hp color LaserJet 3500/3550 and 3700 series printer service
HP Color LaserJet 3500/3550 and 3700 series printers Service Manual
© 2004 Copyright Hewlett-Packard Development Company, L.P. Reproduction, adaptation or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty.
Conventions This manual uses the following conventions: Color is used to emphasize items that are important to the material under discussion. Bold is used for menu items to click and for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or emphasis. DISPLAY type indicates text as seen on the printer control panel display. Commands you use on a computer keyboard or on the printer control panel are shown in Keycap.
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Table of contents 1 Printer description Chapter contents .......................................................................................................................1 Printer configurations ................................................................................................................3 HP Color LaserJet 3500/3550 printer .................................................................................3 HP Color LaserJet 3500n/3550n printer .......................................
Canadian DOC regulations ...............................................................................................37 EMI statement (Korea) .....................................................................................................37 VCCI statement (Japan) ...................................................................................................37 Laser statement for Finland ..............................................................................................
Installing memory and font DIMMs .........................................................................................79 Enabling memory ..............................................................................................................83 Enabling the language font DIMM (HP color LaserJet 3700 only) ...................................83 Checking DIMM installation (HP color LaserJet 3700 only) .............................................
Paper feeder ..........................................................................................................................197 Pickup/delivery sequence ...............................................................................................198 Paper jam detection ........................................................................................................199 6 Removal and replacement Chapter contents .............................................................................
Fuser front paper sensor (PS6) removal ........................................................................256 Fuser delivery paper sensor (PS7) removal ...................................................................256 Face-down delivery paper sensor (PS8) removal ..........................................................257 Reversed paper sensor (PS9) removal (HP 3700 only) .................................................257 Duplex feed delivery paper sensor (PS10) removal (HP 3700 only) ........
7 Troubleshooting Chapter contents ...................................................................................................................303 Introduction ............................................................................................................................306 Troubleshooting process .......................................................................................................307 Pre-troubleshooting checklist ........................................................
Image defects ........................................................................................................................390 Light image ....................................................................................................................391 Light color .......................................................................................................................392 Dark image ................................................................................................
Event log .........................................................................................................................431 Diagnostics ............................................................................................................................433 Diagnostics flowchart ......................................................................................................433 Engine diagnostics ..........................................................................................
List of tables Table 1-1. Table 1-2. Table 1-3. Table 1-4. Table 1-5. Table 1-6. Table 1-7. Table 1-8. Table 1-9. Table 1-10. Table 1-11. Table 1-12. Table 1-13. Table 2-1. Table 3-1. Table 3-2. Table 3-3. Table 3-4. Table 4-1. Table 4-2. Table 4-3. Table 5-1. Table 5-2. Table 5-3. Table 5-4. Table 5-5. Table 5-6. Table 6-1. Table 6-2. Table 6-3. Table 7-1. Table 7-2. Table 7-3. Table 7-4. Table 7-5. Table 7-6. Table 7-7. Table 7-8. Table 7-9. Table 7-10. Table 7-11. Table 7-12. Table 7-13. Table 7-14.
Table 7-16. Table 7-17. Table 7-18. Table 7-19. Table 7-20. Table 7-21. Table 7-22. Table 7-23. Table 7-24. Table 7-25. Table 7-26. Table 7-27. Table 7-28. Table 7-29. Table 7-30. Table 7-31. Table 7-32. Table 7-33. Table 7-34. Table 7-35. Table 7-36. Table 7-37. Table 7-38. Table 7-39. Table 7-40. Table 7-41. Table 7-42. Table 7-43. Table 7-44. Table 7-45. Table 7-46. Table 7-47. Table 7-48. Table 7-49. Table 7-50. Table 8-1. Table 8-2. Table 8-3. Table 8-4. Table 8-5. Table 8-6. Table 8-7. Table 8-8.
Table 8-22. Table 8-23. Table 8-24. Table 8-25. Table 8-26. Table 8-27. Table 8-28. ENWW Left swing frame assembly ...........................................................................529 Fuser assembly .............................................................................................531 500-Sheet paper feeder main body ..............................................................533 500-Sheet paper feeder paper pick-up drive assembly ................................
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List of figures Figure 1-1. Figure 1-2. Figure 1-3. Figure 1-4. Figure 1-5. Figure 1-6. Figure 1-7. Figure 1-8. Figure 1-9. Figure 1-10. Figure 1-11. Figure 1-12. Figure 1-13. Figure 1-14. Figure 3-1. Figure 3-2. Figure 3-3. Figure 3-4. Figure 3-5. Figure 3-6. Figure 4-1. Figure 4-2. Figure 4-3. Figure 5-1. Figure 5-2. Figure 5-3. Figure 5-4. Figure 5-5. Figure 5-6. Figure 5-7. Figure 5-8. Figure 5-9. Figure 5-10. Figure 5-11. Figure 5-12. Figure 5-13. Figure 5-14. Figure 5-15. Figure 5-16. Figure 5-17.
Figure 5-20. Figure 5-21. Figure 5-22. Figure 5-23. Figure 5-24. Figure 5-25. Figure 5-26. Figure 5-27. Figure 5-28. Figure 5-29. Figure 5-30. Figure 5-31. Figure 5-32. Figure 5-33. Figure 5-34. Figure 5-35. Figure 5-36. Figure 5-37. Figure 5-38. Figure 5-39. Figure 5-40. Figure 5-41. Figure 5-42. Figure 5-43. Figure 5-44. Figure 5-45. Figure 5-46. Figure 5-47. Figure 5-48. Figure 5-49. Figure 5-50. Figure 5-51. Figure 5-52. Figure 5-53. Figure 5-54. Figure 5-55. Figure 5-56. Figure 5-57. Figure 5-58.
Figure 6-8. Figure 6-9. Figure 6-10. Figure 6-11. Figure 6-12. Figure 6-13. Figure 6-14. Figure 6-15. Figure 6-16. Figure 6-17. Figure 6-18. Figure 6-19. Figure 6-20. Figure 6-21. Figure 6-22. Figure 6-23. Figure 6-24. Figure 6-25. Figure 6-26. Figure 6-27. Figure 6-28. Figure 6-29. Figure 6-30. Figure 6-31. Figure 6-32. Figure 6-33. Figure 6-34. Figure 6-35. Figure 6-36. Figure 6-37. Figure 6-38. Figure 6-39. Figure 6-40. Figure 6-41. Figure 6-42. Figure 6-43. Figure 6-44. Figure 6-45. Figure 6-46.
Figure 6-64. Figure 6-65. Figure 6-66. Figure 6-67. Figure 6-68. Figure 6-69. Figure 6-70. Figure 6-71. Figure 6-72. Figure 6-73. Figure 6-74. Figure 6-75. Figure 6-76. Figure 6-77. Figure 6-78. Figure 6-79. Figure 6-80. Figure 6-81. Figure 6-82. Figure 6-83. Figure 6-84. Figure 6-85. Figure 6-86. Figure 6-87. Figure 6-88. Figure 6-89. Figure 6-90. Figure 6-91. Figure 6-92. Figure 6-93. Figure 6-94. Figure 6-95. Figure 6-96. Figure 6-97. Figure 6-98. Figure 6-99. Figure 6-100. Figure 6-101. Figure 6-102.
Figure 6-120. Figure 6-121. Figure 6-122. Figure 6-123. Figure 6-124. Figure 6-125. Figure 6-126. Figure 6-127. Figure 6-128. Figure 6-129. Figure 6-130. Figure 6-131. Figure 6-132. Figure 6-133. Figure 6-134. Figure 6-135. Figure 6-136. Figure 6-137. Figure 6-138. Figure 6-139. Figure 6-140. Figure 6-141. Figure 6-142. Figure 6-143. Figure 6-144. Figure 6-145. Figure 6-146. Figure 6-147. Figure 6-148. Figure 6-149. Figure 6-150. Figure 6-151. Figure 6-152. Figure 6-153. Figure 6-154. Figure 6-155.
Figure 7-18. Figure 7-19. Figure 7-20. Figure 7-21. Figure 7-22. Figure 7-23. Figure 7-24. Figure 7-25. Figure 7-26. Figure 7-27. Figure 7-28. Figure 7-29. Figure 7-30. Figure 7-31. Figure 7-32. Figure 8-1. Figure 8-2. Figure 8-3. Figure 8-4. Figure 8-5. Figure 8-6. Figure 8-7. Figure 8-8. Figure 8-9. Figure 8-10. Figure 8-11. Figure 8-12. Figure 8-13. Figure 8-14. Figure 8-15. Figure 8-16. Figure 8-17. Figure 8-18. Figure 8-19. Figure 8-20. Figure 8-21. Figure 8-22. Figure 8-23. Figure 8-24. Figure 8-25.
1 Printer description Chapter contents This chapter contains the following sections. Chapter contents .......................................................................................................................1 Printer configurations ................................................................................................................3 HP Color LaserJet 3500/3550 printer .................................................................................
Media weight .....................................................................................................................29 Environmental product stewardship program .........................................................................31 Protecting the environment ...............................................................................................31 Declaration of Conformities .....................................................................................................
Printer configurations HP Color LaserJet 3500/3550 printer Figure 1-1. HP Color LaserJet 3500/3550 printer The HP Color LaserJet 3500 printer is a four-color laser printer that prints 12 pages per minute (ppm) in both monochrome (black and white) and color. The HP Color LaserJet 3550 printer prints 16 pages per minute (ppm) in both monochrome (black and white) and color. Trays.
HP Color LaserJet 3700 printer Figure 1-3. HP Color LaserJet 3700 printer The HP Color LaserJet 3700 printer is a four-color laser printer that prints 16 ppm in both monochrome and color. Trays. The printer comes with a multipurpose tray (Tray 1) that holds up to 100 sheets of various paper types and sizes or 10 envelopes, and a 250-sheet paper feeder (Tray 2) that supports various paper sizes. It supports an optional 500-sheet paper feeder (Tray 3). See Print media specifications for more information.
HP Color LaserJet 3700dn printer Figure 1-5. HP Color LaserJet 3700dn printer The HP Color LaserJet 3700dn printer includes the features of the HP Color LaserJet 3700n printer, automatic two-sided (duplex) printing, and a total of 128 MB of SDRAM. HP Color LaserJet 3700dtn printer Figure 1-6. HP Color LaserJet 3700dtn printer The HP Color LaserJet 3700dtn printer includes the features of the HP Color LaserJet 3700dn printer, with an additional 500-sheet paper feeder (Tray 3).
Printer features Table 1-1. Features Feature HP Color LaserJet 3500/3550 series printer HP Color LaserJet 3700 series printer Performance ● ● 16 ppm (in both monochrome and color). If the performance of the printer is less than this, see the HP Color LaserJet 3550 and 3700 series printer User Guide for factors affecting printer performance. ● Prints on a variety of media. For more information see Print media specifications. Prints on a variety of media.
Table 1-1. Features (continued) Feature HP Color LaserJet 3500/3550 series printer HP Color LaserJet 3700 series printer Fonts ● ● 80 internal fonts available for both PCL and PostScript emulation. ● 80 printer-matching screen fonts in TrueTypeTM format available with the software solution. ● Prints on paper from 76 x 127 mm (3 x 5 inches) up to 215 x 355 mm (8.5 x 14 inches). Paper handling Accessories ENWW Not applicable.
Table 1-1. Features (continued) Feature HP Color LaserJet 3500/3550 series printer HP Color LaserJet 3700 series printer Connectivity ● High-speed universal serial bus (USB) 2.0 cable interface. ● ● HP Jetdirect en3700 external print server; standard on theHP Color LaserJet 3500n/3550n printer. Standard, bidirectional, parallel cable interface (IEEE-1284 compliant) for backward compatibility. ● Universal serial bus (USB) cable interface.
Printer assemblies Front and rear features The two figures below show the location of each major assembly in the printer. These assemblies are described in the Installation and configuration chapter. Figure 1-7.
Figure 1-8.
Site requirements The printer must be kept in a proper location to maintain the performance level that has been set at the factory. In particular, be sure that the environment adheres to the specifications listed in this chapter. Below are recommendations for the printer location and placement. Make sure the printer has the following: ● a well-ventilated, dust-free area ● a hard, level surface (not more than a 2° angle) that can support approximately 43.4 kg (95.
Figure 1-10. Space requirements for the HP Color LaserJet 3700 series printer with optional Tray 3 1 2 3 Height: 862 mm (34 in.) Depth: 1480 mm (58.3 in.) Width: 699.5 mm (27.6 in.) Electrical specifications WARNING! Power requirements are based on the country/region where the printer is sold. Do not convert operating voltages. This may damage the printer and void the product warranty. Table 1-2.
Table 1-3. Power consumption for 110 and 220-volt (average in watts)1 (continued) Product Printing2 Ready3 Power Save4 Off Heat outputReady (BTU/ hour) HP Color LaserJet 3700 400 25 25 0.25 85 HP Color LaserJet 3700n 400 26 26 0.25 89 HP Color LaserJet 3700dn 400 26 26 0.25 89 HP Color LaserJet 3700dtn 400 26 26 0.25 89 1 The power consumptions reported are the highest values measured for color and monochrome printing using standard voltages.
Table 1-5. Supply storage requirements (continued) Severe (maximum of 18 days) Severe (maximum of 18 days) High: 35° to 40° C (95° to 104° F) Low: 0° to -20° C (32° to -4° F) Maximum temperature change rate 40° to 15° C (104° to 59° F) within 3 minutes -20° to 25° C (-4° to 77° F) within 3 minutes Humidity Normal (maximum of 2.5 years) 35% to 85% RH Severe (maximum of 18 days) High: 85% to 95% RH Low: 10% to 35% RH Atmospheric pressure 460 to 760 mm Hg (18.1 to 29.9 in Hg) Storage time1 2.
Printer specifications Table 1-6. Physical dimensions Product Height Depth Width Weight HP Color LaserJet 3500/3550 series with print cartridges 467 mm (18.4 in) 447 mm (17.6 in) 499.5 mm (19.67 in) 36.6 kg (80.52 lbs) HP Color LaserJet 3500/3550 series printer with print cartridges and optional Tray 3 603 mm (23.8 in) 447 mm (17.6 in) 499.5 mm (19.67 in) 42 kg (92.4 lbs) HP Color LaserJet 3700 series printer with print cartridges 467 mm (18.4 in) 447 mm (17.6 in) 499.5 mm (19.67 in) 37.
Print media specifications For optimum results, use conventional 75 g/m2 to 90 g/m2 (20 to 24 lb) photocopy paper. Verify that the paper is of good quality and is free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, curls, or bent edges. Supported media weights and sizes Table 1-8. Tray 1 paper sizes1 shows the media types and sizes supported by the printer and the printer accessories. Table 1-8.
Table 1-9. Tray 2 paper sizes1 Media Dimensions Weight or thickness Capacity Letter 216 by 279 mm (8.5 by 11 in) 60 to 105 g/m2 (16 to 28 lb bond) 250 sheets (75 g/m2; 20 lb bond) Legal 216 by 356 mm (8.5 by 14 in) 60 to 105 g/m2 (16 to 28 lb bond) 250 sheets (75 g/m2; 20 lb bond) Executive 184 by 267 mm (7.3 by 10.5 in) 60 to 105 g/m2 (16 to 28 lb bond) 250 sheets (75 g/m2; 20 lb bond) Executive (JIS) 216 by 330 mm (8.
Manual two-sided printing. Any of the supported paper sizes and types listed for printing from Tray 1 can be manually duplexed. See the two-sided (duplex) printing section in the HP Color LaserJet 3550 and 3700 series printer User Guide for more information.
Hewlett-Packard warranty statement HP PRODUCT HP Color LaserJet 3500, 3500n, 3550, 3550n, 3700, 3700n, 3700dn, and 3700dtn printers DURATION OF LIMITED WARRANTY One-year limited warranty HP warrants to you, the end-user customer, that HP hardware and accessories will be free from defects in materials and workmanship after the date of purchase, for the period specified above.
HP's Premium Protection Print Cartridge Warranty Limited Warranty Statement This HP Print Cartridge is warranted to be free from defects in materials and workmanship. This warranty does not apply to print cartridges that (a) have been refilled, refurbished, remanufactured or tampered with in any way, (b) experience problems resulting from misuse, improper storage, or operation outside of the published environmental specifications for the printer product or (c) exhibit wear from ordinary use.
Premium Protection Warranty Color LaserJet Image Fuser Kit and Image Transfer Kit Limited Warranty Statement This HP product is warranted to be free from defects in materials and workmanship until the printer provides a low-life indicator on the control panel.
Identification HP's Product Stewardship program monitors product design to help protect the environment. Model and serial numbers The model number and serial numbers are listed on identification labels located on the rear of the printer. The model number is alphanumeric, such as Q5990A for the HP Color LaserJet 3550 printer. The serial number contains information about the country/region of origin, the printer version, production code, and the production number of the printer (see Figure 1-11.
CAUTION Converting the voltage on the printer can damage the printer. Do not use any voltage other than the operating voltage. Any attempt to convert operating voltages will void the product warranty (for example, attempting to change a 110V printer to a 220V printer). Figure 1-12.
Selecting paper You can use many types of paper and other print media with this printer. This section provides guidelines and specifications for selecting and using different print media. Before purchasing any paper or specialized forms in quantity, verify that your paper supplier obtains and understands the print media requirements specified in the HP LaserJet Printer Family Print Media Specification Guide.
ENWW ● Do not use paper that is embossed or coated, and that is not designed for the temperatures of the HP Color LaserJet 3500/3550 and 3700 series printer image fusers. Select paper that can tolerate temperatures of 190°C (374°F) for 0.1 second. HP produces a selection of paper that is designed for the HP Color LaserJet 3500/3550 and 3700 series printer. ● Do not use letterhead paper with low-temperature dyes or thermography.
Printing on special media Use these guidelines when printing on special types of media. Transparencies When printing on transparencies, use the following guidelines: CAUTION ● Handle transparencies using the edges. Oils from your fingers deposited on the transparency can cause print quality problems. ● Use only overhead transparencies recommended for use in this printer. Hewlett-Packard recommends using HP Color LaserJet Transparencies with this printer.
Envelopes NOTE Envelopes can be printed only from Tray 1. Set the tray media size to the specific envelope size. Adhere to the following guidelines to help ensure proper printing on envelopes and to help prevent printer jams: NOTE ● Do not load more than ten envelopes into Tray 1. ● The weight rating of envelopes should not exceed 90 g/m2 (24 lb bond). ● Envelopes should be flat. ● Do not use envelopes with windows or clasps. ● Envelopes must not be wrinkled, nicked, or otherwise damaged.
Heavy paper When printing on heavy paper, use the following guidelines: CAUTION ● Any tray will print most heavy media that does not exceed 105 g/m2 (28 lb bond). ● Use cardstock only in Tray 1 (135 g/m2to 216 g/m2; 50 to 80 lb cover). ● In either the software application or the printer driver, select HEAVY (106 g/m2 to 163 g/ m2; 28 to 43 lb bond) or CARDSTOCK (135 g/m2 to 216 g/m2; 50 to 80 lb cover) as the media type, or print from a tray that is configured for heavy paper.
Recycled paper This printer supports the use of recycled paper. Recycled paper must meet the same specifications as standard paper. See the HP LaserJet Printer Family Print Media Specification Guide. Hewlett-Packard recommends that recycled paper contain no more than five percent ground wood. Media weight Table 1-13. Weight equivalence table shows equivalent weights for different grades of paper. A boldface type value indicates a commonly available standard weight for that grade.
Table 1-13.
Environmental product stewardship program Environmental protection for this product is described in this section. Protecting the environment Hewlett-Packard Company is committed to providing quality products in an environmentally sound manner. This product has been designed with several attributes to minimize impacts on the environment. Ozone production This product generates no appreciable ozone gas (O3).
HP LaserJet printing supplies In many countries/regions, this product’s printing supplies (for example, print cartridges) can be returned to HP through the HP Printing Supplies Returns and Recycling Program. An easy-to-use and free takeback program is available in more than 30 countries/regions. Multilingual program information and instructions are included in every new HP LaserJetprint cartridge and supplies package.
Extended warranty HP SupportPack provides coverage for the HP hardware product and all HP-supplied internal components. The hardware maintenance covers a three-year period from date of the HP product purchase. The customer must purchase the HP SupportPack within 90 days of the HP product purchase. For more information, contact the HP Customer Care Service and HP Customer Support group. See Hewlett-Packard warranty statement.
Declaration of Conformities Declaration of Conformity according to ISO/IEC Guide 22 and EN 45014 Manufacturer’s Name: Manufacturer's Address: Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714-1021, USA declares, that the product Product Name: Regulatory Model Number:3) Product Options: HP Color LaserJet 3500 HP Color LaserJet 3550 BOISB-0302-01 All conforms to the following Product Specifications: SAFETY: IEC 60950:1999 / EN60950: 2000 IEC 60825-1:1993 + A1:1997 +A2:2001 / EN 60825-1:1
Declaration of Conformity according to ISO/IEC Guide 22 and EN 45014 Manufacturer’s Name: Manufacturer's Address: Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714-1021, USA declares, that the product Product Name: Regulatory Model Number4) Product Options: HP Color LaserJet 3700/3700n/3700dn/3700dtn BOISB-0302-00 Including Q2486A - Optional 500-Sheet Input Tray All conforms to the following Product Specifications: SAFETY: IEC 60950:1999 / EN60950: 2000 IEC 60825-1:1993 + A1:1997 +A2:
Declaration of Conformity according to ISO/IEC Guide 22 and EN 45014 Manufacturer’s Name: Manufacturer's Address: Hewlett-Packard Company 8000 Foothills Blvd.
Safety statements Laser safety statement The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. The printer is certified as a “Class 1” laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968.
Laser statement for Finland Luokan 1 laserlaite Klass 1 Laser Apparat HP Color LaserJet 3550, 3550n, 3700, 3700n, 3700dn, 3700dtn, laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite. Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn laitteen ulkopuolelle. Laitteen turvallisuusluokka on määritetty standardin EN 60825-1 (1994) mukaisesti.
FCC Regulations This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy. If this equipment is not installed and used in accordance with the instructions, it may cause harmful interference to radio communications.
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2 Service approach Chapter contents This chapter contains the following sections. Chapter contents .....................................................................................................................41 Search approach .....................................................................................................................42 Parts and supplies ...................................................................................................................43 Ordering parts ...
Search approach Printer repair normally begins by using the printer internal diagnostics and the three-step process below. 1. Isolate the problem to the major system (for example, the host computer, the network or server, or the printer system). 2. Determine if the problem is located in an accessory or in the printer engine. 3. Troubleshoot the problem. Once a faulty part is located, the printer can usually be repaired at the assembly level by replacing field-replaceable units (FRUs).
Parts and supplies This section identifies parts and supplies ordering information and how to obtain HP assistance. Ordering parts Field-replaceable and accessory part numbers are found in chapter 8 of this manual. Order replacement parts from Hewlett-Packard Customer Support-Americas (HPCS-A) or HewlettPackard Customer Support-Europe (HPCS-E). NOTE Use only accessories specifically designed for this printer. Accessories can be ordered from an authorized service or support provider.
Exchange program HP offers remanufactured assemblies for some parts. These are identified in chapter 8 and can be ordered from Hewlett-Packard Customer Support-Americas (HPCS-A) or HewlettPackard Customer Support-Europe (HPCS-E). Supplies Paper and print cartridges can be ordered directly from Hewlett-Packard. See chapter 8 for ordering information. World Wide Web Printer drivers, updated HP printer software, and product and support information can be obtained from the following website: In the U.S.
HP service agreements Call (800) 743-8305 in the U.S. or (800) 268-1221 in Canada. Other areas Outside of North America and Europe, contact the local HP sales office for assistance in obtaining technical support for resellers and service technicians. Ordering related documentation and software Table 2-1. Related documentation and software shows where to order related documentation and software.
HP maintenance agreements HP has several types of maintenance agreements that meet a wide range of support needs. Maintenance agreements are not part of the standard warranty. Support services may vary by area. Check with your local HP dealer to determine the services available to you. On-site service agreements To provide you with the level of support best suited to your needs, HP has on-site service agreements with a selection of response times.
3 Installation and configuration Chapter contents This chapter contains the following sections: Chapter contents .....................................................................................................................47 Checking the package contents ..............................................................................................48 Unpacking the printer ..............................................................................................................
Checking the package contents Figure 3-1. HP Color LaserJet 3500/3550 printer package contents 1 2 3 4 5 6 7 Figure 3-2.
NOTE The items listed here are for the external print server connection. Figure 3-3. HP Color LaserJet 3700, 3700n, or 3700dn printer package contents 1 2 3 4 5 6 Figure 3-4.
Unpacking the printer NOTE Save all the packing materials in case you need to repack and transport the printer at a later date. WARNING! The printer weighs approximately 33.5 kg (73.3 lbs). HP recommends having two or more people lift or move the printer. 1. Prepare the location by selecting a sturdy, level surface in a well-ventilated, dust-free area. Make sure there is enough space around the printer so that the air vents on the left side and rear of the printer are not blocked.
2. Lift the printer from the packing pallet and place it in the prepared location. Two people must lift and move the printer. WARNING! Do not lift the printer by the Tray 2 handle. 3. If you are using an optional 500-sheet paper feeder, lift the printer using the handles and align the pegs on Tray 3. Lower the printer onto the tray. NOTE ENWW Only one Tray 3 (500-sheet input tray) can be installed.
4. Remove all external orange tape, orange protectors, and other packaging material. 5. Open Tray 2 and Tray 3 (if necessary), and remove the orange shipping lock inside each tray.
6. Open the lower rear door, and make sure that the two blue pressure release lever actuators are in the upright position. The two release levers are located on the left and right side of the lower rear door. 7. Close the lower rear door. 8. Lift the front door handle, and pull down the front door. NOTE When you open the front door, you will hear components clicking. CAUTION Do not place anything on the transfer unit.
9. Remove the orange tape and orange shipping locks on the rear, left, and right sides of the transfer unit. Remove any remaining tape from the printer.
Installing the print cartridge 1. Remove a new print cartridge from the bag. 2. Grasp both sides of the print cartridge and distribute the toner by gently rocking the cartridge from side to side. 3. Remove and discard the orange shipping tape and the shipping locks from the new print cartridge. NOTE ENWW Discard the shipping tape and the shipping locks according to local regulations.
4. Locate the color slot for the print cartridge. 5. Align the print cartridge with the tracks inside the printer and, using the handle, insert the cartridge. Repeat this procedure for the remaining three cartridges. 6. Firmly close the front door.
Loading paper into Tray 3 (optional) 1. Pull the tray out of the printer. 2. Adjust the length guides. ● Letter-size paper: Raise the blue rear stop. ● A4-size paper: Lower the blue rear stop. 3. Adjust the width guides. ENWW ● Letter-size paper: Press the center of the side width guides outward as far as possible. ● A4-size paper: Press the blue ridges on the outside of the side width guides inward as far as possible.
4. Load the paper into the tray. If this is special paper, such as letterhead, load it with the side to be printed down and the top edge toward the front of the tray. NOTE Do not fan paper before loading. 5. Make sure the stack of paper is flat in the tray at all four corners, and keep it below the height tabs. 6. Slide the tray back into the printer.
Loading paper into Tray 2 1. Pull Tray 2 out of the printer. 2. Move the side width guides until the blue arrows on the width guides point to the size of paper you are loading. 3. On the back of the tray, press the blue ridges and slide the length guides until the arrow symbol points to the paper size you are loading.
4. Load the paper into the tray. If this is special paper, such as letterhead, load it with the side to be printed down and the top edge toward the front of the tray. NOTE Do not fan the paper before loading. 5. Push down on the stack of paper to lock the metal lift plate into place. Make sure that the stack of paper is flat and that the paper is below the height tabs. 6. Slide the tray back into the printer. Raise the output bin extension.
Loading paper into Tray 1 (optional procedure) 1. Open Tray 1, and raise the output bin extension. NOTE If printing special media, such as envelopes, use Tray 1. 2. Slide out the tray extender and, if necessary, open the additional tray extender. 3. Slide the width guides slightly wider than the print media. Remove any unused print media, and close the tray when finished printing.
Connecting power 1. Connect the AC power cord to the printer and to a power outlet. NOTE Do not connect the printer to the computer or to the network at this time. 2. Turn the printer on. After a minimum of two minutes, the green ready light turns on.
Installing a new control panel overlay (optional) Overlays are available for several languages and come shipped with the printer. If you are setting up a printer for a language other than English, complete the following procedure. 1. Select the language from the sheet of adhesive control panel overlays. 2. Position the new overlay over the top of the control panel. Set the overlay in place by pressing down on the overlay and smoothing it across its surface.
Testing the printer operation Print a demo page to ensure the printer is working properly. 1. Press MENU to enter the MENUS. 2. Press to highlight Information. 3. Press to select Information. 4. Press to highlight PRINT DEMO. 5. Press to select PRINT CONFIGURATION. After printing the demo page, the printer control panel displays the Ready message.
Using PowerSave Time The adjustable PowerSave Time feature reduces power consumption when the printer has been inactive for an extended period. You can set the length of time before the printer goes into PowerSave mode to 1 MINUTE, 15 MINUTES, 30 MINUTES, or to 1 HOUR, 1.5 HOURS, 2 HOURS, or 4 HOURS. The default setting is 30 MINUTES. NOTE The printer display appears dimmed when the printer is in PowerSave mode.
USB configuration All printer models support USB connections. The USB port is on the back of the printer. Connecting the USB cable Plug the USB cable into the printer. Plug the other end of the USB cable into the computer. Figure 3-5.
Parallel configuration (HP Color LaserJet 3700 series printer only) TheHP Color LaserJet 3700 printer supports network and parallel connections at the same time. A parallel connection is made by connecting the printer to the computer using a bidirectional parallel cable (IEEE-1284 compliant) with a b-connector plugged into the printer parallel port. The cable can be a maximum of 10 meters (or (30 feet)) long.
Network configuration NOTE The network configuration feature is available for the HP Color LaserJet 3700 series printer when an EIO device is installed. You might need to configure certain network parameters on the printer. You can configure these parameters from the printer control panel, the embedded Web server, or for most networks, from the HP Web Jetadmin software or the HP Toolbox. NOTE For more information about using the embedded Web server, see Using the embedded Web server in the user guide.
Enhanced I/O (EIO) configuration (HP color LaserJet 3700 series printer only) This printer comes equipped with one enhanced input/output (EIO) slot. This slot holds compatible external devices, such as the HP Jetdirect print server network cards or other devices. EIO network cards can maximize printer performance when printing from a network. In addition, they provide the ability to place the printer anywhere on a network.
NetWare networks When using Novell NetWare products with an HP Jetdirect print server, Queue Server mode provides improved printing performance over Remote Printer mode. The HP Jetdirect print server supports Novell Directory Services (NDS), as well as bindery modes. For more information, see the HP Jetdirect Print Server Administrator’s Guide. For Windows 98, Me, NT 4.0, 2000, and XP systems, use the printer installation utility for printer setup on a NetWare network.
Printer software Included with the printer is a CD-ROM containing the printing system software. The software components and printer drivers on this CD-ROM help you use the printer to its fullest potential. See the getting started guide for installation instructions. NOTE For the latest information about the printing system software components, view the Readme files on the CD-ROM. This section summarizes the software included on the CD-ROM.
Table 3-2. Printer drivers for the HP Color LaserJet 3700 series printer Operating system1 PCL 6 PS Emulation Windows 98, Me Windows NT 4.0 NOTE Windows NT does not support USB. Windows 20002 Windows XP (32-bit)2 Windows XP (64-bit)23 Windows Server 2003 (32-bit) Windows Server 2003 (64-bit) Macintosh OS 1 Not all printer features are available from all drivers or operating systems. See the online Help in your driver for availability of features.
HP Web Jetadmin HP Web Jetadmin allows you to manage HP Jetdirect-connected printers within your intranet using a browser. HP Web Jetadmin is a browser-based management tool and should be installed only on the network administrator computer. It can be installed and run on a variety of systems. To download a current version of HP Web Jetadmin and, for the latest list of supported host systems, visit HP Customer Care Online at http://www.hp.com/go/webjetadmin.
HP Toolbox The HP Toolbox is an application that you can use for the following tasks: ● Check the printer status. ● Configure the printer settings. ● View troubleshooting information. ● View online documentation. ● Print internal printer pages. You can view the HP Toolbox when the printer is directly connected to your computer or when it is connected to a network. You must have performed a complete software installation to use the HP Toolbox.
Other components and utilities Several software applications are available for Windows and Macintosh OS users, as well as for network administrators. These programs are summarized below. Table 3-3.
Setting security on the printer This printer features control panel locking, which allows network administrators to prevent users from changing certain printer control panel settings. When a menu is locked, unauthorized users trying to change settings in the printer control panel will receive the following message: Access Denied MENUS LOCKED You can use HP Web Jetadmin software, the HP LaserJet Utility for Macintosh, or an ASCII escape sequence to perform this procedure.
Use HP Web Jetadmin software, HP LaserJet Utility for Macintosh, or an ASCII escape sequence to set security. HP software, which comes on the software CD-ROM, is easier to use than an ASCII escape sequence. For instructions about locking the control panel by using either HP Web Jetadmin software or the HP LaserJet Utility for Macintosh, go to the online Help for that software.
Printer memory for the HP Color LaserJet 3700 series printer The printer has three DIMM slots. The bottom slot is for the firmware DIMM. NOTE For maximum flexibility in DIMM support, the formatter is designed with three 168-pin DIMM slots and a fourth 100-pin DIMM slot.
Installing memory and font DIMMs You can install more memory for the printer, and you can also install a font DIMM to allow the printer to print characters for languages such as Chinese or the Cyrillic alphabet. NOTE Static electricity can damage DIMMs. When handling DIMMs, either wear an antistatic wrist strap, or frequently touch the surface of the DIMM antistatic package and then touch bare metal on the printer. 1. Turn the printer off. 2. Disconnect all power and interface cables.
3. Open the DIMM access door by gently prying it with a flat-bladed screwdriver. Remove the door by pulling the door toward the back of the printer. 4. Loosen the screws that hold the formatter door to the printer and remove the formatter door. 5. Remove the DIMM from the antistatic package. Locate the alignment notches on the bottom edge of the DIMM.
6. Holding the DIMM by the edges, align the notches on the DIMM with the bars in the DIMM slot. 7. Firmly press the DIMM straight into the slot. Close the locks on each side of the DIMM until they snap into place. NOTE ENWW If you have difficulty inserting the DIMM or closing the latches, make sure the notches on the bottom of the DIMM are aligned with the bars in the slot. If the DIMM still does not go in, make sure you are using the correct type of DIMM.
8. Align the formatter door in the tracks at the bottom of the slot, and turn the screws to secure the formatter door to the printer. 9. Replace the DIMM access door by inserting the tabs on the door into the slots on the printer. Swing the door shut. 10. Reconnect the power cable and the USB/parallel cable.
11. Turn the printer on. 12. If you installed a memory DIMM, go to Enabling memory. If you installed a language font DIMM, go to Enabling the language font DIMM (HP color LaserJet 3700 only). Enabling memory If you installed a memory DIMM, set the printer driver to recognize the newly added memory. To enable memory for Windows 1. On the Start menu, point to Settings, and click Printers or Printers and Faxes. 2. Select this printer and select Properties. 3. On the Configure tab, click More. 4.
To enable fonts from the PCL 6 printer driver for Windows 1. On the Start menu, point to Settings, and click Printers. 2. Select this printer and select Properties. 3. On the Configure tab, click More. 4. Select the Font DIMM check box. 5. In the Configure Font DIMMs dialog box, click Add to add the font file. 6. In the Add Font DIMM dialog box, browse to the location of the font file, select the font file, and click OK. 7. In the Configure Font DIMMs dialog box, select the installed DIMM. 8. Click OK. 9.
Installing an HP Jetdirect print server card in the HP color LaserJet 3700 series printer You can install an HP Jetdirect print server card in the base model printer, which comes with an open EIO slot. To install the HP Jetdirect print server card 1. Turn the printer off. 2. Disconnect all power and interface cables.
3. Locate the EIO slot. Loosen and remove the two retaining screws holding the EIO slot cover to the printer and remove the cover. You will not need these screws and cover again. 4. Firmly insert the HP Jetdirect print server card into the EIO slot. Insert and tighten the retaining screws that came with the print server card. 5. Connect the network cable.
6. Reconnect the power cable and turn the printer on. 7. Print a configuration page. In addition to a printer configuration page and a Supplies Status page, an HP Jetdirect configuration page that contains network configuration and status information should also print. If it does not print, uninstall and reinstall the print server card to ensure that it is completely seated in the slot. 8. Perform one of these steps: Choose the correct port.
Installing an HP Jetdirect en3700 external print server 1. Attach the HP Jetdirect en3700 external print server to a 10Base-T or to a 100Base-T local network by plugging the network cable into the network port on the rear panel. 2. Attach the print server to the printer using the USB cable. Insert the DC power cord from the power module into the power connector on the rear panel, and then insert into a power outlet.
3. The 10 or the 100 LED turns on, indicating a network connection, and the power/status LED blinks. After 15 seconds, the power/status LED light and the USB printer LED light appear green. The power/status LED will blink if there is network activity. 4. Press the test button on the back of the external print server to print an HP Jetdirect configuration page. Note the IP address for reference.
90 Chapter 3 Installation and configuration ENWW
4 Printer maintenance Chapter contents This chapter contains the following sections. Chapter contents .....................................................................................................................91 Cleaning the printer and accessories ......................................................................................92 Cleaning spilled toner .......................................................................................................92 Managing supplies ...............
Cleaning the printer and accessories Clean the outside surfaces with a water-dampened cloth. Observe the warning and caution below. WARNING! Before you begin these steps, turn the printer off and unplug all power cords to avoid shock hazard. Be careful when cleaning around the fuser area. It might be hot. CAUTION To avoid permanent damage to the print cartridge, do not use ammonia-based cleaners on or around the printer.
Cleaning mode During the printing process, paper, toner, and dust particles can accumulate inside the printer. Over time, this buildup can cause print-quality problems, such as toner specks or smearing. This printer has a cleaning mode that can correct and prevent these types of problems. Figure 4-1. Toner specks Figure 4-2. Toner smearing To clean the printer using the printer control panel: 1. Press MENU to enter the MENUS. 2. Press to highlight Configure Device. 3.
Managing supplies Using, storing, and monitoring print cartridges can help ensure quality printer output. Supplies life The life of the print cartridge depends on usage patterns and the amount of toner that print jobs require. For example, when printing text at 5% coverage, an HP print cartridge lasts an average of 4,000 or 6,000 pages, depending on the printer model. (A typical business letter is about 5% coverage.
Table 4-3. Approximate replacement intervals Item Printer message Page count Approximate time period1 Print cartridges REPLACE BLACK CARTRIDGE 6,000 pages2 4 months Color cartridge REPLACE CARTRIDGE 6,000 pages2 4 months Image transfer kit REPLACE TRANSFER KIT 75,000 pages3 50 months Image fuser kit REPLACE FUSER KIT 75,000 pages3 50 months 1 Approximate life is based on 1,500 pages per month.
Locating supplies and parts Supplies and parts are identified by labeling and by blue plastic handles. The following graphic shows the location of each supply item and part. Figure 4-3.
Replacing supply items Carefully follow the guidelines in this section when replacing printer supplies or parts. Replace a print cartridge when the printer control panel displays a REPLACE CARTRIDGE message. The control panel display will also indicate the color that should be replaced (unless a genuine HP print cartridge is not currently installed). 1. Lift the front door handle and pull down the front door.
3. Remove the new print cartridge from the bag. Place the used print cartridge in the bag for recycling. 4. Grasp both sides of the cartridge and distribute the toner by gently rocking the cartridge from side to side. 5. Remove the orange shipping locks and the orange shipping tape from the new print cartridge. Discard the shipping tape and shipping locks according to local regulations.
6. Align the print cartridge with the tracks inside the printer, and using the blue handle, insert the print cartridge until it is firmly seated. 7. Firmly close the front door. After a short calibration time, the control panel should display Ready. NOTE If a cartridge is in the wrong slot or the wrong type for the printer, the control panel will display the message, INCORRECT or Incorrect supplies. 8. Installation is complete.
1. Lift the front door handle and pull down the front door. WARNING! Do not place anything on the transfer unit. Do not touch the top of the transfer unit or the contacts on the left side of the transfer unit. 2. Grasp the right blue handle. Press and hold down the blue button. Slightly lift the right side of the transfer unit.
3. Grasp the left blue handle and lift to remove the transfer unit from the printer. NOTE For information on how to properly dispose of the used transfer unit, go to http://www.hp.com/ recycle. 4. Using handles, remove the new transfer unit from the bag. Use the blue handles on both sides to hold the transfer unit. 5. Place the new transfer unit on a flat surface. Remove the orange shipping locks.
6. Guide the left side of the transfer unit into the front door of the printer. Insert the two pegs on the left side into the holes, and then lower the right side into the door. 7. Make sure that the blue button on the right blue handle has released (popped up). If the button has not released, grasp the right blue handle and pull the transfer unit toward you. 8. Firmly close the front door. 9.
NOTE If the old transfer unit was not at end-of-life when it was replaced (for example, if it was damaged), the transfer unit count must be reset using the printer control panel. Replacing the transfer unit when it is not at end-of-life If you replace the transfer unit when it is not at the end-of-life, for instance if it is defective, you will need to reset the transfer unit count and then calibrate the printer, through the control panel. To reset the transfer unit count, do the following: 1.
To replace the fuser 1. Turn the printer off. WARNING! The fuser might be hot. Wait 10 minutes before proceeding. 2. Open the lower rear door (rear output bin). 3. Slide out the lower rear door (rear output bin) tray extender.
4. Lift and pull the lower rear door (rear output bin) while using your finger to press the tab with ridges on the left side of the door. Remove the lower rear door (rear output bin). 5. Place your thumbs on the blue ridges (near warning label) and, using fingers, pull up on the blue latches. 6. Pull the fuser out of the printer. NOTE ENWW For information on how to properly dispose of the fuser, go to http://www.hp.com/recycle.
7. Remove the new fuser from the bag. 8. Hold the fuser with your thumbs on the blue ridges and fingers on the blue latches. Push both sides of the fuser into the printer. 9. Press the black ridges on the front of the fuser until the fuser clicks into place.
10. Rotate the green levers to the up position. 11. To reattach the lower rear door (rear output bin), hold the door at a 45° angle, and fit the peg into the round hole on the right side.
12. Press the ridges on the tab on the left side of the door, and fit the peg into the round hole. 13. Close the lower rear door (rear output bin). NOTE After replacing the fuser, you must also replace the pickup roller. See To replace the pickup roller for instructions. To replace the pickup roller NOTE 108 The printer should still be turned off.
1. Remove Tray 2 and place it on a flat surface. 2. Use one finger to push on the blue side of the pickup roller until the peg comes out of the right hole. 3. Pull down gently on the pickup roller to remove the left peg of the pickup roller from the printer.
4. Remove the new pickup roller from the bag. NOTE For information on how to properly dispose of the used pickup roller, go to http://www.hp.com/ recycle. 5. Hold the blue side of the pickup roller, and insert the left peg into the round hole in the printer. 6. Push in on the pickup roller while lifting up on the right side of the pickup roller, so the pin goes into the hole.
7. Rotate the blue side of the pickup roller until it clicks into place. 8. Replace Tray 2. 9. Turn the printer on. After a short time, the printer control panel should display the message NEW FUSER KIT. 10. If the message NEW FUSER KIT appears, go to step 11. If the message does not appear, you must reset the fuser count. See To reset the fuser count. 11. On the printer control panel, press to highlight YES, and then press fuser count is reset and the printer is ready to use. to select it.
112 Chapter 4 Printer maintenance ENWW
5 Theory of operation Chapter contents This chapter contains the following sections. Chapter contents ...................................................................................................................113 Basic operation .....................................................................................................................114 Operation sequence .......................................................................................................114 Power-on sequences .......
Basic operation The HP Color LaserJet 3500/3550 and 3700 series printer functions are divided into four systems: 1. Engine control system 2. Laser/scanner system 3. Image formation system 4. Pickup/feed system Upon receipt of printing commands from the external device via the formatter, the engine control system provides control for the laser/scanner system, the image formation system, and the pickup/feed system and performs print operations.
Table 5-1. Basic operation sequence Period WAIT (wait period) From the time the power switch is turned on until the ITB cleaning is completed. Purpose Remark Clear the charge from the drum surface and clean the ITB. Detect the presence of the cartridge and the environmental conditions. Control the color misregistration and the image stability as required.
Power-on sequences The figure below shows the sequence from the time the power is switched on until STBY period. Figure 5-2. Power-on sequence Figure notes 1. See Developing engaging/disengaging unit, later in this chapter. 2. See Secondary transfer roller engaging/disengaging control. 3. The sequences inside the dotted-line box are performed when required.
4. The color misregistration control controls the correction of both horizontal and vertical misregistration. See Color misregistration control, later in this chapter, for more information. 5. The image stabilization control controls the correction of the high-voltage bias output value and VIDEO signal PWM value for a stable image. See Image stabilization control, later in this chapter, for more information.
Figure 5-3.
Engine control system The engine control system functions as the brain of the printer. It controls the laser/scanner system, the image formation system, and the pickup/feed system according to the commands received from the formatter. The engine control system consists of the following: ● DC controller printed circuit board (PCB) assembly ● High-voltage power supply PCB ● Low-voltage power supply PCB The block diagram below illustrates the engine control system.
NOTE See the General circuit diagram in Chapter 7, for detailed information on the printer circuitry. Figure 5-5.
Block functions CPU (IC1001) The 16-bit single-chip microcomputer that constitutes the CPU incorporates ROM and RAM and controls the following operations of the printer according to the control programs stored in the ROM: 1. Printer engine sequence 2. Fuser heater drive circuit/fuser safety monitor circuit 3. Solenoids 4. Clutches 5. Sensors/switches ASIC (IC1002) The application specific IC (ASIC) is used to interface to the IC, the memory, the external devices, and so on.
Table 5-2. Motor Functions 122 Name Function Type Direction of rotation Speed switching Failure detection M1 Feed motor Drives the pick-up roller, feed roller, duplexing feed roller, and fuser. Stepping motor Clockwise 4-speed (full, 1/2, 1/3, 1/4) No M2 Delivery motor Drives the feed roller, developing engaging clutch (CL3)/drive assembly, and output delivery rollers.
Figure 5-6. Motor locations Table 5-3. Function of solenoids Name Function SL2 Tray 2 (cassette) pick-up solenoid Drives the Tray 2 (cassette) pick-up roller. SL1 Tray 1 (multipurpose tray) pick-up solenoid Drives the Tray 1 (multipurpose tray) pick-up roller. SL4 Secondary transfer roller engaging solenoid Engages and disengages the secondary transfer roller. SL5 Duplexing feed solenoid (Not available for the HP 3500/3550) Drives the Tray 1 (multipurpose tray) pick-up roller. Table 5-4.
Figure 5-7. Solenoid and clutch locations Drum motor control The drum motor control controls the drive of the drum motor (M3). The drum motor is a three-phase, eight-pole DC motor with a built-in drive circuit. The drum motor drives the four color photosensitive drums, the K (black) developing cylinder, and the ITB. The drum motor operates under the control of the DRUM MOTOR ACCELERATION signal (/DRMITBACC) and the DRUM MOTOR DECELERATION signal (/DRMITBDEC) from the DC controller. Figure 5-8.
Under the following conditions, the DC controller judges the drum motor faulty and sends an error message to the formatter: ● Drum motor start abnormality: The interval of the /DRMITBFG signals does not become regular in 1000 ms from the drum motor start. ● Drum motor rotation abnormality: The interval of the /DRMITBFG signal stays irregular for 100 ms or more after it has become regular. Developing motor control This developing motor control controls the drive of the developing motor (M4).
The DC controller monitors the FAN ROTATION DETECTION signal (/FANS) to control the RPM of the fan. The /FANS signal outputs (turn “L”) when the fan rotates at the speed of the specified RPM: when the DC controller judges the fan normal. The DC controller judges the fan faulty and sends the error message to the formatter when the /FANS signal has not been input (turns “H”) for 10 seconds or more.
Fuser control circuit The fuser control circuit controls the temperature of the fuser. The following figure shows the ceramic heater fusing method used by this printer. Figure 5-12. Ceramic heater fusing method The fuser control circuit has three main components: ● Fuser heater (H1): A ceramic heater that heats the fuser sleeve. ● Thermistors (TH1, TH2): Two thermistors monitor temperature: ● ● Main thermistor (TH1): Monitors print temperature and between-sheets temperature (contact type).
The heater temperature control controls the drive signals of the fuser heater to monitor and maintain the surface temperatures of the fuser sleeve and the fuser heater at the target temperature. Figure 5-13. Heater temperature control circuit Two thermistors monitor fuser (fixing) heater temperature: ● Main thermistor (TH1): Monitors the print temperature and the between-sheets temperature. It is placed in contact with the inside surface of the fuser sleeve and monitors the sleeve temperature.
● Print temperature control: Maintains the fuser heater in the printer at the target temperature. The CPU raises the target temperature in stages in one sprinting process to prevent the fuser sleeve temperature from falling as the paper goes through. During printing of multiple pages, the target temperature also varies in stages depending on the number of pages printed.
NOTE The thermoswitch is some distance away from the fuser heater. The actual temperature of the fuser heater is about 50˚ C (122˚ F) higher than the temperature read by the thermoswitch. Failure detection If the CPU judges the fuser faulty, it performs the following tasks: 1. It stops the output of the FUSER DRIVE signal (FSRD) (turn “L”). 2. It sets the RELAY DRIVE signal (RLD) to stop (turn “H”). 3. It sends an error message to the formatter.
Low-voltage power supply circuit This circuit converts AC voltage from the power supply receptacle to DC power and supply each load. Figure 5-14. Low-voltage power supply circuit When the power switch (SW3001) is turned on, the AC power is supplied to the low-voltage power supply circuit, where it is converted to +24 V, +5 V, and +3.3 V DC power required inside the printer.
The major recipients of the +24 V, +5 V, and +3.3 V DC power are listed below. ● +24 V: motors, solenoids, clutches, high-voltage power supply PCB, memory controller PCB, and optional parts ● +5 V: laser driver PCB, high-voltage power supply PCB, formatter, and sensors (except for the photo interrupter) ● +3.
The DC controller controls the high-voltage power supply circuit and generates the highvoltage bias. See Image formation system for the details on image formation. Figure 5-15. High-voltage power supply circuit Primary charging bias generation The primary charging biases (PR11, PR12, PR13, PR14) are used to charge the photosensitive drum surface with negative potential to prepare for image formation.
Primary transfer bias generation The primary transfer biases (TR11, TR12, TR13, TR14) are output to transfer the toner on the photosensitive drum to the ITB. They are the DC positive biases, one for each color (C, Y, M, K), generated in the primary transfer high-voltage generation circuit in the high-voltage power supply circuit. The high-voltage power supply circuit applies them to the primary transfer charging rollers in each cartridge at the specified time.
Video interface control The video interface enables communication between the formatter and the DC controller. The formatter uses the video interface to monitor the printer status continuously. It sends the VIDEO signal via the video interface when the printer is ready for printing. The DC controller turns the laser on/off according to the VIDEO signal. Figure 5-16. Video interface Operational description The VIDEO INTERFACE signal is exchanged as follows during print: 1.
8. The DC controller re-feeds the paper after a specified time from /TOP signal output and transfers the toner image from the ITB onto the paper. This aligns the leading edge of the paper and the top of the image. 9. The paper, having had the toner image fixed on it, is delivered to the delivery tray when the print is completed. Printing continues when the DC controller receives another print command from the formatter during the first print. See Image formation system and Pickup/feed system.
The types and purposes of the VIDEO INTERFACE signals are described below. ● NOTE The abbreviations Bk and K are used interchangeably and refer to the black toner developing operations. ● Figure 5-18. ENWW VDO1, /VDO1, VDO2, /VDO2, VDO3, /VDO3, VDO4, /VDO4, (VIDEO) signals (formatter output): These signals are the information of the image the printer engine is going to print. The laser drivers turn the laser diode on or off based on these signals. This printer has four laser units, one for each color.
/BD1, /BD2, /BD3, /BD4 (HORIZONTAL SYNCHRONOUS) signals (formatter input): This signal synchronizes the horizontal (main) scanning line: the reference signal in the horizontal direction of the laser beam. When the /TOP signal is received, the formatter counts the /BD signals of each color and sends each color’s VIDEO signal synchronized with each /BD signal corresponding to the specific number of scanning in sequence to the DC controller. This justifies the writing position of the image.
Laser/scanner system The laser/scanner system forms latent images on the photosensitive drum according to the VIDEO signals sent from the formatter. The laser/scanner unit is illustrated below. Figure 5-20. Laser/scanner unit The laser/scanner unit is controlled by the DC controller and consists of four laser units and two laser driver PCBs (two each of the units sitting on one laser driver), and two scanner motors (one scanner mirror reflects two colors’ laser beams).
1. Upon receiving a print command from the formatter, the DC controller outputs the SCANNER MOTOR SPEED CONTROL signals (Y/M: /ACC1, /DEC1 C/Bk: /ACC2, / DEC2) and rotates the scanner motor to rotate two four-faced mirrors. NOTE The abbreviations Bk and K are used interchangeably and refer to the black developing operation. 2. When the scanner motor starts rotating, the DC controller outputs LASER CONTROL signals (CTRL10~40, CTRL11~41) and emits a laser beam to input BD INPUT signals (/ BD21, /BD41).
The laser driver PCB is divided into two. One is for Y/M, and the other for C/K. The Y/M laser driver PCB only is described here, as both are identical. Figure 5-21. Laser control block diagram The DC controller sends the VIDEO signals (VDO, /VDO) for forming images and the LASER CONTROL signals (CTRL0, CTRL1) for switching the operation modes of the laser driver circuit to each laser driver IC (IC101, IC102).
● Horizontal synchronization control ● Image masking control The LASER CURRENT OUTPUT signal (PDOUT) is an analog signal generated by transforming the amount of laser to a current value. The DC controller obtains each laser’s light amount based on the PDOUT signal and passes such information on to the formatter, while the formatter adjusts the PWM (adjusts the laser emission timing according to the halftone).
5. Upon receipt of /BD1 and /BD2 signals, the formatter sends the VIDEO signals (VDO1, / VDO1, VDO2, /VDO2) to the DC controller to align the scanning starting position of the image horizontally. Image mask control This control prevents laser beam emission in a non-image area except during the unblanking interval. The DC controller puts the laser driver circuit to Force LD OFF mode to force the LD OFF while the laser beam scans a non-image area except during the unblanking interval.
Failure detection This control monitors any failure of the laser diode. The laser IC converts the laser current of the LD to voltage during initial APC and sends the PDOUT signal to the CPU. When the voltage of the PDOUT signal is below a specified value, the CPU judges the laser faulty and informs the formatter. Scanner motor control This control rotates the scanner motor to strike the laser beam at the correct position on the photosensitive drum.
Speed control The speed control maintains the scanner motor rotation at a specified speed. The following is the sequence of steps performed by the speed control. 1. The DC controller sends the /ACC1 signal to the scanner driver IC at the scanner motor startup to rotate the motor. 2. The DC controller forces the laser on and monitors the revolutions of the scanner motor by comparing the intervals between the BD INPUT signal (/BD2I) and the reference clock. 3.
Image formation system The image formation system, which serves as the nerve center of the printer, forms a toner image on paper. The DC controller controls the image formation system, which consists of units such as the developing section (four cartridges and the developing disengaging unit), the transfer section (transfer unit and secondary transfer roller), and the fuser.
Figure 5-25. Image formation system (signal paths) Print process The print process can be divided into nine steps, which are executed in five blocks. A toner image is formed on paper as it goes through each process.
The print process blocks and the steps performed in them are listed below. Refer to Figure 5-26. Print process diagram to see the placement of the blocks. ● ● Electrostatic latent image formation block: Forms an electrostatic latent image on the photosensitive drum. ● Primary charging ● Laser beam exposure Developing block: Makes the electrostatic latent image on the photosensitive drum visible by applying the toner on top of the image using the contact development method.
● Fuser block: Fixes or fuses a toner image on paper. ● ● Figure 5-26. ENWW Fuser Cleaning block: Clears the residual toner on the photosensitive drum and the ITB.
Electrostatic latent image formation block This block consists of two steps, where an electrostatic latent image is formed on the photosensitive drums. The drum surface carries negative electrical charges in areas that are not exposed to the laser beam through the steps in this block. The image with negative charges on the drum is called an electrostatic latent image, as it is invisible to the human eyes. Figure 5-27.
An electrostatic latent image is formed on the photosensitive drum in this step. As the laser beam scans the negatively charged drum surface, the negative potential on the exposed area gets neutralized and forms an electrostatic latent image. Figure 5-29. Laser beam exposure Development block The electrostatic latent image on the photosensitive drum surface is made visible by applying the toner using the contact development method in this process.
Contacting the photosensitive drum, the negatively charged toner sticks to the area exposed to the laser beam. This is because the exposed area has higher (less negative) potential than the developing cylinder, while the toner has almost the same potential as the cylinder. This is called the phenomenon of contact, which makes visible the electrostatic latent image on the drum. Photosensitive drum Blade Stirrer Developing cylinder Toner feed roller DC bias Figure 5-30.
The toner image on the photosensitive drum is transferred onto the ITB in this step. (The ITB is a thin seamless belt made of resins. It is of low resistance and eliminates the applied bias by itself.) As a positive DC bias is applied to the transfer roller opposite the drum to charge the ITB positive, a negatively charged toner on the drum is transferred onto the ITB. Each color’s toner image is transferred in order of Y, M, C, and K and forms one toner image, overlaying one color’s image on another.
The static charge on the back of the paper is decreased with the static charge eliminator to reduce static cling and make it easy to separate the paper. Figure 5-34. Separation Fuser block A toner image is fixed, or fused, onto paper in this block. The toner image transferred on top of the paper through the transfer block can be smeared easily by hands since it is only attracted to paper by static electricity. The toner image on paper is fused by pressure and heat to permanently print it on paper here.
A positive DC bias is applied to the pressure roller to enhance the power to hold the toner on paper and prevent the toner from being attracted to the fuser sleeve (offset). Figure 5-35. Fusing Cleaning block This block consists of two steps and clears the residual toner from the ITB, photosensitive drum, and the primary charging roller. During the transfer step, not all toner is transferred from the ITB and the drums onto the paper but some remains on top of them.
The residual toner on the drum is scraped away with a cleaning blade and delivered to the waste toner container inside the cartridge afterwards. This cleans the surface of the photosensitive drum. Waste toner container Cleaning blade Residual (waste) toner Photosensitive drum Figure 5-37. Drum cleaning Developing section The developing section consists of four cartridges and the developing engaging unit.
Each cartridge has a built-in memory tag, into which the memory controller PCB reads/writes data. Figure 5-38. Cartridge diagram Figure notes: ● M3: Drum motor ● M4: Developing motor ● CL2: K developing clutch Developing engaging/disengaging unit The developing engaging unit has a developing engaging lever which shifts up and down as the developing engaging clutch is engaged or disengaged, being driven by the delivery motor (M2).
1. Memory tag control 2. Cartridge presence detection 3. Cartridge life detection 4. Developing cylinder engaging/disengaging control 5.
6. The above operations are detailed in the following sections. NOTE The cartridges are driven by two motors so the K cartridge can be driven independently for monochrome operations thus preventing wear of the other cartridges (photosensitive drums). Figure 5-39.
Memory tag control The memory tag is a nonvolatile memory built in the print cartridge. The cartridge usage condition is monitored by reading/writing the data stored in the memory tag. The cartridge usage condition is stored in the memory tag as a memory data. The memory controller reads/writes a memory data into the tag at the specified timing upon receipt of a command from the DC controller.
The DC controller judges the cartridge presence based on the primary transfer current. The DC controller measures the primary transfer current when the power is turned on or a door is closed. When the measurement is over the specified value, the DC controller judges it “no cartridge” and sends the error message to the formatter. Figure 5-41.
The DC controller detects the end of toner by monitoring the amount of time it takes for light to pass through the cartridge during printing. There is a memory controller PCB with light emitter (LED) and light receiver (PD) on the back of the cartridge. When a print operation starts, the DC controller emits light from the LED with TONER LEVEL DETECTION LED DRIVE signal (TONLED). The light enters the toner container through the light guide attached to the cartridge.
1. The DC controller turns ON the developing engaging clutch (CL3). 2. When the CL3 stays engaged for specified time, the drive of delivery motor (M2) raises the developing engaging lever up. 3. The developing engaging lever then raises the bottom of the cartridge in the back and disengages the developing cylinder from the photosensitive drum.
The DC controller disengages the developing cylinder to start this control and apply two negative biases alternately to the primary charging roller. This attracts the toner away from the primary charging roller to the photosensitive drum. The toner on the photosensitive drum is then scraped off the drum by the cleaning blade to be delivered to the waste toner container. Figure 5-43.
1. ITB cleaning control 2. Waste toner level monitor 3. Primary transfer roller engaging/disengaging control 4. Secondary transfer roller engaging/disengaging control 5.
The above operations are discussed in the following sections. Figure 5-44.
ITB cleaning control This controls the removal of the residual toner from the ITB to prevent an image defect. The following is the sequence of this control. 1. The cleaning blade on the ITB is always in contact with the ITB and scraping the residual toner off the ITB. (See callout A in figure Figure 5-45. ITB cleaning control, below.) 2. The toner scraped off the ITB is transferred onto the waste toner conveyor belt by the ITB cleaning screw. 3.
The waste toner container has a light guide and a waste toner level sensor (PS13) on the top. The light from the light emitter on the PS13 is let in to the waste toner container through the light guide attached to the cartridge. It passes through the container and goes back through the light guide when the light receiver on the PS13 detects the light. Upon detection of light, the receiver sends a WASTE TONER FULL DETECTION signal (/WTNSNS) to the DC controller.
If neither the PS12 or the PS13 receives light, the DC controller judges that the “transfer unit is not present, OUT” and sends an error message to the formatter. Figure 5-47. Transfer unit detection NOTE If light is received only at one of the light receivers on the PS12 or P13, it will not be judged as ITB unit OUT, but will be judged as the following errors.
NOTE The accumulated rotation time of the drum motor can be cleared by the formatter. Remember to reset the transfer unit life expectancy value (accumulated rotation time of the drum motor) using the control panel when replacing the ITB unit. ITB self-aligning mechanism This printer automatically aligns the position of the ITB to prevent tearing of the belt due to its misalignment.
This mechanism functions whenever the ITB rotates to prevent misalignment of the ITB. Figure 5-49. ITB self-aligning mechanism Primary transfer roller engaging/disengaging control This controls the disengagement of the primary transfer roller from the photosensitive drum to transfer only K (black) toner onto ITB for monochrome print. The DC controller sends a control command and drives the primary transfer roller engaging motor (M5). The following is the sequence of this control. 1.
The primary transfer rollers engage back with the drums when the M5 is turned counterclockwise and the cam pushes the holder up. Figure 5-50. Primary transfer roller engaging/disengaging control NOTE The opposite photosensitive drums (Y, M, and C) stop when the primary transfer rollers are disengaged. Secondary transfer roller engaging/disengaging control This controls the engagement of the secondary transfer roller with the ITB to transfer toner on the ITB to the paper.
The secondary transfer roller disengages from the ITB when the DC controller turns the SL4 again for 0.5 second and rotates the cam a half turn. Figure 5-51. Secondary transfer roller engaging/disengaging control Secondary transfer roller engaging/disengaging detection The DC controller monitors the secondary transfer roller engaging sensor (PS16) when the secondary transfer is completed. The secondary transfer roller engaging cam has the secondary transfer roller engaging flag on its shaft.
The DC controller judges the engagement/disengagement mechanism faulty and sends the error message to the formatter when the T2SNS signal is not input/output within a specified time during the engagement/disengagement operation. Figure 5-52. Secondary transfer roller engaging/disengaging detection Color misregistration control This controls the correction of color misregistration caused by the variation of cartridges and the laser/scanner unit.
2. The DC controller measures each color’s misregistration based on the positions of the patterns detected by the misregistration detection (See Color misregistration control). 3. The measured information is then sent to the formatter. 4. The formatter controls each color’s VIDEO signals according to such information, making an adjustment to the horizontal scan starting position, horizontal scanning scale, or scan starting position.
NOTE The horizontal scanning scale is the size of the image in horizontal scanning. Every color has its own photosensitive drum in each cartridge in this printer. The positions of each drum differ and the laser beam lengths vary because of the variations among the cartridges; that is, the horizontal scanning area depends on the color. This can cause a color misregistration at the edge of the image. Figure 5-53.
The DC controller monitors the color misregistration sensors (PS12) during the foregoing color misregistration control. There are two units of PS12 on the ITB, each having one light emitter (LED) and one light receiver (PD). The following is the sequence of this control. 1. The DC controller sends LED DRIVE signal (REGLED) and lets the LED emit light. 2. The light of the LED is reflected off the ITB and received by the PD on the sensor.
There are three kinds of controls executed as necessary. Figure 5-55. ● Environmental change control: The environmental condition sensor (PS15) controls the bias according to the environmental conditions. ● Image density control (D-max): The color misregistration sensor (PS12) calibrates the bias value when the image density is at max. ● Image halftone control (D-half): The color misregistration sensor (PS12) calibrates the halftone data in the formatter.
The environmental conditions sensor (PS15) on top of the fan detects the temperature and the humidity. The PS15 sends this information to the DC controller in the form of the TEMPERATURE DETECTION signal (TEMSNS) and the HUMIDITY DETECTION signal (HUMSNS). The DC controller monitors the environmental conditions of the printer based on these two signals. The DC controller controls the following biases to prevent image defects when it detects an environmental change upon receipt of these two signals.
2. The DC controller detects the density of the density detection patterns on the ITB by the image density detection and sends the data back to the formatter. (See Figure 5-56. Image density detection, below) 3. The formatter calibrates the halftone based on such data to obtain an ideal halftone image. Image density detection The density of all four colors’ image density detection patterns formed on the ITB is detected to adjust the image density.
The DC controller notifies the formatter of each error when the following errors are found during image density detection. The initial value is reset to the new image density adjustment value when an error occurs. ENWW ● Image density sensor abnormality warning: No light is received at the light receivers. ● Image density out of guaranteed range warning: The measurement is found to be out of specified range.
Pickup/feed system The pickup/feed system, being comprised of various feed rollers, picks up and feeds a sheet of paper. This printer has two pickup trays (the Tray 2 (cassette) and the Tray 1 (multipurpose), and two delivery trays (the face-down tray and the face-up tray). The Tray 1 (multipurpose tray) paper sensor (PS1) detects the presence of paper on the Tray 1 (multipurpose tray) and the Tray 2 (cassette) paper sensor (PS2), and detects the presence of paper in Tray 2.
NOTE The terms fixing and fuser refer to the same operation (or assembly) and are used interchangeably in this document. Also, ITB unit and transfer unit refer to the same assembly and are used interchangeably throughout this document. Figure 5-57.
2. Fuser/delivery unit: fuser to delivery source 3. Duplexing feed unit (3700 printer only): fuser delivery source to registration roller inlet Figure 5-58. Pickup/feed system blocks Pickup/feed unit The pickup/feed unit, being comprised of the pickup unit and feed unit, picks up paper from the Tray 2 (cassette) or Tray 1 (multipurpose tray) pickup tray one-by-one and feeds it into the printer until it reaches the fuser. Figure 5-59. Pickup/delivery unit block diagrams the pickup/feed unit.
1. The printer controls the fuser heater temperature and drives the scanner motor upon receipt of a print command from the formatter. 2. When the fuser heater reaches a specified temperature, it drives the feed motor (M1). 3. The solenoid at each paper pickup source is turned on after a specified period from the scanner motor drive start.
9. The toner is transferred onto the paper on the ITB and the paper is then fed to the fuser/ delivery unit. Figure 5-59.
Table 5-5.
1. The registration shutter stops the fed paper and evens up the edge of the paper along the shutter. 2. As the feed roller continues rotating, the paper is pushed against the shutter and gets warped. 3. The force of paper being warped lifts up the shutter and the paper goes through the shutter. This corrects the position of skewed paper. Figure 5-60.
Media detection This printer detects the media type to prevent a fuser defect. The DC controller controls the media sensor (PS5) for this detection. The PS5 has a light emitter (LED) and a light receiver (CMOS sensor). The light from the emitter is reflected off the media surface and received at the receiver.
2. The paper is pressed between the fuser sleeve and the pressure roller to fuse the toner on top and then delivered out of the fuser. 3. When the leading edge of the paper is detected by the fuser delivery paper sensor (PS7), the delivery motor (M2) drives and rotates the delivery roller.
4. When the paper end is detected by the fuser delivery paper sensor (PS7), the M2 rotates at double-speed and delivers the paper out to the face-down tray at high speed. NOTE The feed speed is accelerated after paper passes away from the fuser when delivering from the face-down tray because the fuser is far from the tray. Figure 5-62.
Duplexing feed unit (HP 3700 printer only) The duplexing feed unit reverses the paper after one side is printed and re-feeds it to the pickup/feed unit for printing the other side. The following is the sequence of paper feed at the duplexing feed unit. 1. The paper passes through the fuser after the front side is printed. 2. The delivery motor (M2) rotates counterclockwise after a specified period of time from when the paper has passed the fuser and delivers the paper to the duplexing feed unit.
7. The paper, after re-correction of skew by the registration roller, is fed to the delivery tray for printing the other side. NOTE Two stationary A4 or letter size papers may be inside the printer during duplex printing; only one legal size paper may be inside the printer during duplex printing. Figure 5-63.
3. As it rotates counterclockwise by the M2, the delivery roller turns the paper around. The reversed paper is fed to the duplex delivery unit by the guide at the reverse unit. Figure 5-64. Reverse control Duplex feed mode The printer has the following 3 different feed modes for duplex printing. The possible feed modes depend on the print mode and paper size. 1. 1 sheet feed: Print 1 sheet two-sided page in 1 duplex print operation. 2.
Table 5-6. Conditions of available duplex feed Paper size Print mode Duplex feed mode A4, Letter Plain paper 1 sheet feed Gloss paper Gloss film Legal Plain paper 2 sheets feed Thin paper Alternate feed Plain paper, Thin paper 1 sheet feed The duplex feed mode can be selected by command from the formatter. Please note that the duplex print is available only for the media in the print mode (plain, thin, gloss paper, gloss film) shown in the table.
6. Delivery stationary jam: When the paper does not reach the face-down paper sensor (PS8) within the allotted amount of time after paper has reached the fuser delivery paper sensor (PS7), the CPU judges it a delivery stationary jam. 7. Duplexing feed delay jam (3700 printer only): When the paper does not reach the reversed paper sensor (PS9) within the allotted amount of time after the delivery motor has started rotating counter-clockwise, the CPU judges it a duplexing feed delay jam. 8.
Paper feeder The paper feeder is an optional unit that is installed at the bottom of the printer. It picks up and delivers a sheet of paper to the printer. Figure 5-65. Paper feeder illustrates the paper path. Figure 5-65. Paper feeder The paper feeder is controlled by the DC controller. The DC controller drives each load (solenoids, clutches) at the required timing via the paper feeder PCB. The paper sensor detects the presence of paper.
Figure 5-66. Paper feeder PCB signal flow illustrates the flow of signals to and from the paper feeder PCB. Figure 5-66. Paper feeder PCB signal flow Pickup/delivery sequence The paper feeder is driven by the feed motor (M1) via a gear. The following is the sequence of paper pickup at the paper feeder. 1. The printer controls the fuser heater temperature and drives the scanner motor upon receipt of a print command from the formatter. 2.
6. The paper, having had the image on the ITB transferred on it, is fed to the fuser/delivery unit. Figure 5-67. Pickup/delivery sequence Paper jam detection A paper jam at the paper feeder during pickup/delivery is detected in the same way as a paper jam at the printer. See the Paper jam detection section for details.
200 Chapter 5 Theory of operation ENWW
6 Removal and replacement Chapter contents This chapter contains the following sections: Chapter contents ...................................................................................................................201 Introduction ............................................................................................................................204 Removal and replacement strategy ................................................................................204 Repair notices ............
Swing guide removal, right .............................................................................................242 Swing guide removal, left ...............................................................................................245 Switches ................................................................................................................................250 Door Switch (SW1) removal ...........................................................................................
500-Sheet paper feeder internal parts ..................................................................................298 Pick-up roller removal - 500-sheet paper feeder ............................................................298 Separation pad removal - 500-sheet paper feeder ........................................................299 Pick-up drive unit removal - 500-sheet paper feeder .....................................................299 500-Sheet paper feeder sensor/solenoid/motor/PCB ..........
Introduction Removal and replacement procedures are provided for all replaceable parts in the printer. Removal and replacement strategy This chapter explains how to remove and replace major printer components. (HP does not support repairing individual subassemblies or troubleshooting to the component level.) Replacement is generally the reverse of removal. Occasionally, directions for difficult or critical replacement procedures are included.
NOTE All components in the HP Color LaserJet 3500/3550 and 3700 series printers use Phillipshead screws that require a #2 Phillips screwdriver. Ensure that you have a Phillips screwdriver and not a Posidriv screwdriver. Figure 6-1 (below) shows the difference between a Phillips and a Posidriv screwdriver. Note that the Phillips tip has more beveled surfaces. Figure 6-1.
Table 6-1. Common fasteners (continued) Illustration Description Size Part number Use SCREW, RS M3X6 XA9-1499-000C N Secures metal to metal. SCREW, RS M3X8 XA9-1445-000C N Secures any material (except metal) to metal. XB4-7300-805C N Secures sensor PCB to plastic (environmental, toner full, color misregistration, and media). SCREW, TP 206 SCREW,TAPPING,TRUSS HEAD M4X10 XB4-7401-005C N Secures anything to plastic. SCREW, STEPPED M4X4.
Supplies The customer replaces print cartridges, the fuser, and the transfer unit as they are depleted. Chapter 4 explains when to replace supplies and provides instructions on replacing them. NOTE The printer tracks the amount of use on the customer-replaceable supplies by keeping a page count. Swapping supplies between printers might cause a misrepresentation of supply life values and is not recommended.
Table 6-3. Approximate replacement intervals for supply items (continued) Supply item Printer message HP 3500Page counts HP 3550/3700 Page counts Approxima te time period1 To install Image fuser kit REPLACE FUSER KIT 60,000 pages2 75,000 pages2 HP 3500 = 60 months See Fuser removal. HP 3550/3 700 = 50 months 1 Approximate life is based on: 1,000 pages per month for the HP Color LaserJet 3500 series printer and 1500 pages per month for the HP Color LaserJet 3550/3700 series printer.
Covers The following procedures describe removal of the printers external covers. Figure 6-2. Cover locations 1 2 3 4 5 6 7 8 9 10 Left cover Top cover Front door Tray 1 (multipurpose tray) Left front door (includes control panel) DIMM cover (HP 3700 only) Right cover Upper rear door Rear cover Lower rear door (rear output bin) Front door removal 1. Open the front door. 2. Remove the transfer unit and the print cartridges. See Transfer unit removal and Print cartridge removal. 3.
6. Remove two screws (2) from the right hinge (3). Figure 6-3. Front door removal (1 of 2) 7. Remove two screws (1) from the left hinge (2). Figure 6-4. Front door removal (2 of 2) 8. Lifting up slightly on the front door to relieve the pressure on the hinges, pull the hinges out and then remove the front door. Reinstallation tip Each hinge is keyed and will only fit into the side from which it was removed. You may want to initial the hinge with an "R" or "L" to identify them. Left cover removal 1.
2. Slide the cover back in the direction of the arrow (2) about one inch, and then pull it out away from the printer to remove it. Figure 6-5. Left cover removal Left front cover removal 1. Remove left cover. See Left cover removal. 2. Open the front door and remove the transfer unit. See Transfer unit removal. 3. Disconnect the control panel connector (1) and remove one screw (2). Cut the cable tie that is connected around the cable ferrite bead (3) and the cable harness (4). Figure 6-6.
5. If necessary to better access the area, remove the toroid from the cable. To remove the toroid, lift up on the strip (1) and swing the top cover (2) open and then remove the toroid from the wires. Figure 6-7. Left front cover removal (2 of 4) 6. Unhook one claw (3) from the bottom of the cover and pull out the bottom of the cover to loosen it. Reinstallation tip Remember to put the switch rod back into the switch button. Figure 6-8.
7. Unhook three more claws by pressing in or squeezing, at the indicated locations (1), working up from the bottom, to remove the cover (2) from the printer. Figure 6-9. Left front cover removal (3 of 3) Right cover removal 1. Open the rear output bin and the upper rear door. 2. Remove three screws (1). 3. Pull down and out on the bottom edge of the cover (2) to release two claws, then pull out on the front edge (3) to release the additional claws and remove the cover (4). Figure 6-10.
Top cover removal 1. Open the printer front door and remove the transfer unit. See Transfer unit removal. 2. Remove the right cover. See Right cover removal. 3. Remove the left cover. See Left cover removal. 4. Remove four screws (1), unhook one claw (2), and lift the cover off the printer. Figure 6-11. Top cover removal Upper rear door removal 1. Open the upper rear door. 2.
Rear cover removal 1. Release two claws on the right side of the rear cover by inserting a flat-blade screwdriver into each claw location (1) and twist the screwdriver to release each claw, then pull the cover out and to the right (2) to remove it. Figure 6-13. Rear cover removal Lower rear door (rear output bin) removal 1. Open the lower rear door. 2. Press in on the left hinge (1) pushing towards the right to release the pin, then pull the left side of the tray out and to the left (2) to remove it.
Tray 1 (multipurpose) removal 1. Open the Tray 1. 2. Remove two pins (1) by flexing the slotted rail (2) to release the pin. 3. Press in on the left hinge at the base as shown by the arrow, then pull the left side of the tray out and to the right to remove the tray (3). Figure 6-15.
Main Assemblies The following procedures describe removal of the printer's major internal mechanical assemblies. Figure 6-16.
Transfer unit removal CAUTION Do not touch the surface (5), shown in the figure below, of the image transfer belt (ITB) since it can cause an image defect. NOTE If the transfer unit failed or has been replace for some reason other than reaching its end-oflife (end-of-life is indicated by a control panel message stating that the transfer unit requires replacement) then, in addition to replacing the unit, a configuration procedure must be performed.
2. Hold the blue handles (1) on both sides of the transfer unit. With your right thumb, press and hold the lever (2) on the right side handle then lift the handle up (3), followed by the left side (4) to remove the unit. Figure 6-17. Transfer unit removal Reinstallation tip When reinstalling the transfer unit, align the two pins (1) on the left side of the door with the two holes (2) in the left side of the transfer unit. Figure 6-18. Transfer unit installation Print cartridge removal 1.
When performing any servicing inside the printer, all four print cartridges should be removed. NOTE 2. Do not touch the surface of the print cartridge drum (2). The cartridges have flaps that close when the front door is opened to protect the print drum. However, if the flaps do not close, flip them down to cover the exposed area of the print drum. Figure 6-19. Print cartridge removal Grasp the blue handle (1) of a cartridge and pull it slightly upward and out to remove it.
2. Hold the release tabs on each side of the fuser by placing your thumbs on the top tabs (1) and your forefingers on the lower tabs (2). Press up on the bottom tabs (2) to release the assembly and pull it toward you to remove it. Figure 6-20. Fuser removal Face-down delivery assembly removal 1. Remove the following covers: a. Upper rear door, see Upper rear door removal. b. Rear cover, see Rear cover removal. c. Lower rear door, see Lower rear door (rear output bin) removal. d.
3. Pull the face-down assembly out slightly, disconnect one connector (2) from the back, and then remove the assembly (3). Figure 6-21. Face-down delivery assembly removal Laser/scanner assembly removal CAUTION Do not disassemble the laser/scanner assembly. It is not adjustable. Do not touch the lens on the front of the laser/scanner assembly when holding it. 1. Remove the face-down delivery assembly. See Face-down delivery assembly removal. 2. Remove the exhaust fan (FAN1) assembly.
4. Remove six screws (2) and pull the laser/scanner assembly out slightly, disconnect two flat cables (3), and remove the assembly. Figure 6-22. Laser/scanner assembly removal Reinstallation tip Connect the connectors (see callout (3) above) first, then install the laser/scanner assembly. Ensure that the top of the laser/scanner fits into the slots first before installing the remainder of the unit. Image drive assembly removal CAUTION Do not disassemble the image drive assembly. 1.
4. Remove five screws (3) and remove the image drive assembly (4). Figure 6-23. Image drive assembly removal Reinstallation tip When replacing the image drive assembly ensure that the engaging pins are in the "engaged" position (1), as shown below. They should not be in the disengaged position (2). If the pins are not in the disengaged position, turn the gear (3) in the direction of the arrow (4) until it stops.
Developing engaging drive assembly removal 1. Remove the laser/scanner assembly. See Laser/scanner assembly removal. 2. Disconnect one connector (1). 3. Remove two screws (2) and remove the developing engaging drive assembly (3). Reinstallation tip Gear (4) may come off during this disassembly. Make sure to replace it when reassembling. Figure 6-24. Developing engaging drive assembly removal Pick-up/feed assembly removal 1. Remove the right cover. See Right cover removal. 2.
4. Remove two screws (1) and disconnect the right rod bracket (2) from the front door. Figure 6-25. Pick-up/feed assembly removal (1 of 13) 5. Remove two screws (1) and disconnect the left rod bracket (2) from the front door. Figure 6-26.
6. Remove two screws (1) and remove the right swing rod arm (2). Figure 6-27. Pick-up/feed assembly removal (3 of 13) Reinstallation tip When installing the swing rod arm assembly, make sure the short rod is positioned as shown below (1). Figure 6-28.
7. Push the engaging rack (1) all the way back, as shown by the arrow (2), until it stops. Figure 6-29.
8. Remove two screws (3) and remove the swing rod/lock guide (4), shown in the above figure. Reinstallation tip When reassembling the swing rod guide, the engaging rack (callout (1) below) should be positioned to the back (to the right) with respect to the printer, as shown below. The engaging rack will normally be in this back position due to the tension of the spring. Also, the gear behind the engaging rack should be turned all the way clockwise (2).
9. Disconnect one connector (1), remove two screws (2), remove the clutch plate (3), and remove the clutch (4). Reinstallation tip When reinstalling the clutch, insert the clutch onto the clutch shaft. Make sure that the slotted tab on the clutch fits into the tab (6) on the clutch plate. Also, ensure that the white shaft bushing (5), which is keyed, is correctly seated into the notch on the clutch plate. Figure 6-33. Pick-up/feed assembly removal (5 of 13) 10. Disconnect three connectors (1). 11.
12. Remove six screws (4) and remove the main gear plate (5). Figure 6-34. Pick-up/feed assembly removal (6 of 13) Reinstallation tip If the gears come off the gear plate, reinstall them as shown in the figure below. However, when reinstalling the gear plate, it is easier to install the larger gear (callout (1) into the printer, and then install the gear plate and remaining gears. Figure 6-35. Gear plate gear locations replacement 13.
14. Remove two screws (2) and lay the solenoid cover plate (3) down (it will still be connected to the solenoid). Reinstallation tip The solenoid plate has three tabs at the bottom, one tab (5) slips under the printer sheet metal base and the other two tabs (6) fit over the base. Figure 6-36. Pick-up/feed assembly removal (7 of 13) 15. Disconnect one spring (1). 16. Remove two screws (2) and remove the gear unit (3). Figure 6-37. Pick-up/feed assembly removal (8 of 13) 17. Remove two screws (1).
18. Unhook one claw (2) and pull the Tray 2 pick-up gear (3) off the shaft. Reinstallation tip When installing this gear (3) it may be necessary to hold the pick-up feed roller steady while inserting the gear onto the shaft. 19. Remove one screw (4) and remove the solenoid cover and solenoid (5). Figure 6-38. Pick-up/feed assembly removal (9 of 13) 20.
22. Push the right swing guide (1) all the way back. 23. Unhook two claws (2) and remove the connector cover (3). (It may be easier to unhook the upper claw from the other side of the printer frame.) 24. Release one claw (4) and remove the right swing guide rail (5). (It may be easier to unhook the claw from the other side of the frame.) Reinstallation tip The swing guide rail is also secured with a screw, located on the other side of the frame, which was removed in a previous step. Figure 6-40.
26. Disconnect three connectors (1). 27. Remove eight screws (2) and un-route the cable (3). 28. For the HP Color LaserJet 3500/3550 series printers, remove the pick-up/feed assembly (5); for the HP Color LaserJet 3700 series printers, release the duplex pan by pulling out on the green button (4), and then remove the pick-up/feed assembly (5). Figure 6-42.
Main assembly parts The following procedures describe removal of parts located on or around the major internal mechanical assemblies. Figure 6-43.
Tray 1 pick-up roller removal 1. Remove the transfer unit. See Transfer unit removal. 2. Unhook one claw (1) and slide the idler roller (2) in the direction of the arrow. 3. Rotate the Tray 1 pick-up roller (3) upwards to release it from the shaft and lift the roller out. Figure 6-44. Tray 1 pick-up roller removal NOTE Replace the separation pad whenever you replace the pick-up roller. . Tray 1 separation pad removal 1. Remove the Tray 1 pick-up roller. See Tray 1 pick-up roller removal, above. 2.
Tray 2 pick-up roller removal 1. Remove Tray 2. 2. Push the roller (1) in the direction of the arrow, then remove it by pulling the right side out (2) first. Figure 6-46. Tray 2 pick-up roller removal Tray 2 separation pad removal 1. Remove Tray 2. 2. Remove any paper from the tray. 3. Push the lifting plate (1) down. 4. Unhook two claws (2) by pressing in on them, then lift up on the separation pad (3) to remove it. Figure 6-47.
Secondary transfer charging roller removal 1. Remove the transfer unit and the print cartridges. See Transfer unit removal and Print cartridge removal. CAUTION When handling the secondary transfer charging roller, hold the shaft and bushing; do not hold the sponge part of the roller. 2. Lift the blue handle (1) straight up, once the right side is out, continue lifting to release the left side and remove the roller (2). Figure 6-48.
Feed guide unit removal 1. Release the right and left rod brackets from the front door. See Pick-up/feed assembly removal removal procedure, steps 1 through 5. 2. Push the swing guides all the way back. 3. Remove the secondary transfer charging roller. See Secondary transfer charging roller removal. 4. Remove the fuser. See Fuser removal. 5.
6. Push both swing guides all the way back (1), remove four screws (2), and remove the feed guide (3). Figure 6-50. Feed guide removal (2 of 2) Reinstallation tip Make sure that the drive shaft (1) on the feed guide fits correctly into the drive shaft in the printer (2). Figure 6-51.
Swing guide removal, right 1. Open the front door and remove the transfer unit and the print cartridges. See Transfer unit removal and Print cartridge removal. 2. Remove the top cover. See Top cover removal. 3. Remove the print cartridges. See Print cartridge removal. 4. Remove two screws (1) from the right rod bracket (2) to release the bracket from the door. Figure 6-53. Right swing guide removal (1 of 4) 5. Remove two screws (1) and remove the swing rod arm (2). Figure 6-54.
6. Push the swing guide (1) in as far as it will go. Figure 6-55. Right swing guide removal (3 of 4) 7. Remove one spring (1) and then pull the developing (drum) lock arm (2) off its shaft. Figure 6-56. Right swing guide removal (4 of 4) 8. Remove the right, front swing guide rail, see Pick-up/feed assembly removal, step 24. Make sure to remove the screw that secures the rail (screw (1) mentioned in step 19 of the Pick-up/feed assembly removal procedure).
9. Pull the swing guide (1) toward you as far as it will go. Then move it slightly to the left (this allows it to be pulled forward a little more), and pull it forward until it stops. Now, pull the swing guide to the left to remove it. The swing guide should pull out easily. Do not force the guide because it is fragile. NOTE The swing guide has a retainer (1) that holds the swing guide shaft (2) in place.
Swing guide removal, left 1. Remove the high-voltage power supply PCB. See High-voltage power supply PCB removal. 2. Remove the cables (1) from the cable harness (2). 3. Remove the screw (4) from the bracket (3), and remove the metal bracket. Figure 6-59.
4. Remove three screws (1) and swing the cable harness (2) to the right. The cable harness does not need to be completely removed to remove the transfer contact assembly. However, if the cable harness needs to be removed, disconnect the cable connector (3) from the back of the harness to remove the harness. Reinstallation tip The power switch rod (4) rides in a slot at the bottom of the cable harness. When reinstalling the cable harness, make sure the switch rod is inserted in this slot. Figure 6-60.
6. Remove two screws (1) and remove the left swing rod arm (2). Figure 6-62. Left swing guide removal (4 of 6) 7. Push the left swing guide (1) in, as far as it will go (2). Figure 6-63.
8. Remove one spring (1) and remove the developing (drum) lock arm (2). Figure 6-64. Left swing guide removal (6 of 6) 9. Remove the white left swing guide rail. See Pick-up/feed assembly removal, step 25. 10. Pull the left swing guide (1) toward the front of the printer.
11. Remove the swing guide by pulling it to the right, being careful not to force it. The guide must be positioned all the way forward to release the catch on the shaft, which will allow the swing guide to be removed. Reinstallation tip Make sure the projected part at the bottom of the swing guide is placed into the guide rail. Reinstallation tip Make sure the developing (drum) lock arms (1) are in the upright, latched (2) position (as shown in the figure below), before reinstalling the swing guide.
Switches Figure 6-66. Switch locations SW1 Door switch SW1001Test print switch SW3001Power switch Door Switch (SW1) removal 1. Refer to the left swing guide removal procedure, steps 1 through 5, and remove the transfer contact assembly. See Swing guide removal, left. 2. Remove the door switch (1) by sliding it out. Figure 6-67.
Test print switch (SW1001) removal Replacing the test print switch requires the replacement of the DC controller PCB. See DC controller PCB removal. Power switch (SW3001) removal Replacing the power switch requires replacement of the low-voltage power supply PCB. See Low-voltage power supply PCB removal.
Sensors Figure 6-68.
Tray 1 (multipurpose tray) paper sensor (PS1) removal Replacement of the Tray 1 paper sensor requires replacement of the entire pick-up/feed assembly. See Pick-up/feed assembly removal. Tray 2 (cassette) paper sensor (PS2) removal 1. Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. 2. Turn the pick-up/feed assembly over. 3. Remove the Tray 2 pick-up roller (1) by pushing in on the right side (2) of the roller unit and then pull it out and to the right (3) to remove it. Figure 6-69.
5. Unhook two claws (1) and pull the paper sensor (2) out, disconnecting the connector (3) once the sensor is pulled away from the assembly. Figure 6-71. Tray paper sensor removal (3 of 3) Reinstallation tip When reinstalling the sensor, connect the connector first then, install the sensor. Registration paper sensor (PS4) removal 1. Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. 2. Remove one screw (1) and remove the registration paper sensor holder (2). Figure 6-72.
3. Unhook two claws (1), disconnect one connector (2), and remove the registration paper sensor (3) from the sensor holder. Figure 6-73. Registration paper sensor removal (2 of 2) Media sensor (PS5) removal NOTE When the media sensor is replaced, in addition to replacing the sensor, a configuration procedure must be performed. For information on this configuration, refer to Chapter 8, Replacement parts configuration. 1. Remove the color misregistration sensor.
Fuser front paper sensor (PS6) removal 1. Remove the feed guide unit. See Feed guide unit removal. 2. Disconnect one connector (1), unhook two claws (2), and remove the sensor (3). Figure 6-75. Fuser front paper sensor (PS6) removal Fuser delivery paper sensor (PS7) removal 1. Remove the fuser. See Fuser removal. 2. Move the two green levers down (1). 3. Remove two screws (2) and remove the lower fuser cover (3). Figure 6-76.
4. Disconnect one connector (1), unhook two claws (2), and remove the fuser delivery paper sensor (3). Figure 6-77. Fuser delivery paper sensor removal (2 of 2) Face-down delivery paper sensor (PS8) removal 1. Remove the face-down (output bin) delivery assembly. See Face-down delivery assembly removal. 2. Unhook two claws (1) and remove the face-down delivery paper sensor (2). Figure 6-78. Face-down (output bin) delivery paper sensor removal Reversed paper sensor (PS9) removal (HP 3700 only) 1.
3. Loosen the right printer Tray 2 guide. See Cassette (Tray 2) guide, right, removal (HP 3500/3550). Figure 6-79. Reversed paper sensor removal (1 of 2) 4. Remove one connector (1), unhook two claws (2), and remove the sensor (3). In this illustration below the Tray 2 right rail guide is shown attached but is loose, allowing you to remove it to access the back side of the sensor to release the two claws from behind. Figure 6-80.
3. Unhook two claws from the back and remove the sensor (4). Figure 6-81. Duplex feed delivery paper sensor removal Rear output bin paper sensor (PS11) removal 1. Remove the face-down delivery assembly. See Face-down delivery assembly removal. 2. Disconnect one connector (1) and unhook two claws (2).
Color misregistration sensor (PS12) removal When the color misregistration sensor is replaced, in addition to replacing the sensor, a configuration procedure must be performed. For information on this configuration, refer to Chapter 8, Replacement parts configuration. NOTE 1. Refer to the pick-up/feed unit removal procedure, steps 1 through 5, and release the right and left slide rods from the front door. See Pick-up/feed assembly removal. 2. Push the swing guides in as far as they will go. 3.
3. Remove one screw (2) and remove the waste toner level sensor (3). Figure 6-84. Waste toner level sensor removal Developing engaging sensor (PS14) removal 1. Remove the laser/scanner assembly. See Laser/scanner assembly removal. 2. Disconnect one connector (1), unhook two claws (2), and remove the developing engaging sensor (3). Figure 6-85. Developing engaging sensor removal Environment sensor (PS15) removal 1. Remove the left cover. See Left cover removal.
2. Remove one (1) screw and remove the sensor (2). Disconnect the connector (3) while removing the sensor. Figure 6-86. Environmental sensor removal Secondary transfer roller engaging sensor (PS16) removal 1. Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. 2. Turn the assembly upside down. 3. Remove the cable (1) from the cable guides. Using one hand, gently push two claws (2) apart. With your other hand, pull the sensor (3) out by holding the cable connector (4).
Solenoids and Clutches Figure 6-88.
2. Remove one screw (1), disconnect one connector (2), and remove the Tray 1 pick-up solenoid (3). Figure 6-89. Tray 1 pick-up solenoid removal Tray 2 pick-up solenoid (SL2) removal 1. Remove the right cover. See Right cover removal. 2. Refer to the Pick-up/feed assembly removal procedure, steps 4 and 6 through 10, and remove the paper drive gear plate. 3. Remove two screws (1), disconnect one connector (2), and remove the cover plate (3). Figure 6-90.
4. Remove one screw (1) and remove the solenoid (2). Figure 6-91. Tray 2 pick-up solenoid removal (2 of 2) Secondary transfer roller engaging solenoid (SL4) removal 1. Remove the pick-up/feed assembly. See Pick-up/feed assembly removal. 2. Remove five screws (1), the gear side plate (2), plate (3), solenoid (4), and the connector cover (5). Figure 6-92.
3. Disconnect one connector (1), remove one screw (2), and remove the secondary transfer roller engaging solenoid (3). Figure 6-93. Secondary transfer roller engaging solenoid removal (2 of 2) Duplex feed solenoid (SL5) removal (HP 3700 only) 1. Remove the right 250-sheet tray guide. See Cassette (Tray 2) guide, right, removal (HP 3700). 2. Disconnect one connector (1), remove one screw (2), and remove the duplex feed solenoid (3). Figure 6-94.
2. Disconnect one connector (1), remove two screws (2), and remove the plate (3). Figure 6-95. Registration clutch removal (1 of 2) 3. Remove the bushing (1) and remove the registration clutch (2). The bushing needs to be used for the replacement clutch. Figure 6-96. Registration clutch removal (2 of 2) Reinstallation tip Do not forget to reinstall the bushing (1) removed from the previous clutch. The bushing is keyed and fits into the clutch plate one way.
2. Disconnect one connector (1), remove the e-clip (2), and remove the black development clutch (3). Figure 6-97. Black development clutch removal (2 of 2) Developing engaging drive clutch (CL3) removal 1. Remove the developing engaging drive assembly. See Developing engaging drive assembly removal. 2. Remove the e-ring (1) and remove the developing engaging drive clutch (2). Figure 6-98.
Motor and fans Figure 6-99. Motor and fan locations M1 M2 M3 M4 M5 FAN1 Feed motor Delivery motor Drum motor Developing motor Primary transfer roller engaging motor Exhaust fan Feed motor (M1) removal 1. Remove the right swing guide. See Swing guide removal, right. 2. Remove the feed guide. See Feed guide unit removal.
3. Press down on the motor cover claw (1) and lift up on the cover (2) to remove it. If possible, release the cover claw (1) from the other side of the frame. Figure 6-100. Feed motor removal (1 of 3) 4. Disconnect one connector (1) and release the cable guide (2) by pressing in on the claw (3). Move the guide to the side (the cables can remain in the guide). Figure 6-101.
5. Remove two screws (1) and remove the feed motor (2). Figure 6-102. Feed motor removal (3 of 3) Delivery motor (M2) removal 1. Remove the right cover. See Right cover removal. 2. Remove one connector (1). 3. Remove two screws (2) and remove the delivery motor (3). Figure 6-103. Delivery motor removal Drum motor (M3) removal 1. Remove the image drive assembly. See Image drive assembly removal.
2. Remove five screws (1), remove the gear plate (2), and remove two gears (3). Figure 6-104. Drum motor removal (1 of 3) 3. Remove the face-down delivery assembly. See Face-down delivery assembly removal. 4. Remove the laser/scanner assembly. See Laser/scanner assembly removal. 5. Disconnect two connectors (1), remove two screws (2), and remove the developing engaging sensor unit (3) located next to the drum motor (4). Figure 6-105.
6. Remove four screws (1) and remove the drum motor (see callout (4) in the previous figure). Figure 6-106. Drum motor removal (3 of 3) Developing motor (M4) removal 1. Remove the image drive assembly. See Image drive assembly removal. 2. Remove the face-down delivery assembly. See Face-down delivery assembly removal. 3. Remove the laser/scanner assembly. See Laser/scanner assembly removal. 4. Remove the e-ring (1) and one gear (2). Figure 6-107.
5. Remove four screws (1). Figure 6-108. Developing motor removal (2 of 3) 6. Disconnect one connector (1) and remove the developing motor (2). Figure 6-109. Developing motor removal (3 of 3) Primary transfer roller engaging motor (M5) removal 1. Remove the image drive assembly. See Image drive assembly removal. CAUTION It is important to refer to the image driver assembly removal procedure's "Reinstallation notes" to ensure correct installation of this assembly.
3. Refer to the pick-up/feed guide assembly removal procedure, steps 1 through 12, and remove the right side gear plate. See Pick-up/feed assembly removal. CAUTION It is important to refer to the pick-up/feed assembly removal procedure's "Reinstallation notes" to ensure correct installation of this assembly. If reassembly is not performed correctly, it can result in damage to the print cartridge drive pins, the image drive assembly drive pins, and the swing guide mechanism. 4.
7. Remove the motor cover (4) by pressing down on the tab (5) while pulling the cover slightly to the left and up, then pull it and out to remove it. Figure 6-111. Primary transfer roller engaging motor removal (2 of 4) 8. Remove the gear (1) and then remove two screws that secure the motor. Reinstallation tip When reinstalling the gear (1), insert the gear with shaft that was removed in the previous step (callout (3) in the figure above) from inside the printer, through this gear. Figure 6-112.
9. Disconnect one connector (1) and lift the primary transfer roller engaging motor (2) up slightly, and then pull it to the left to remove it. Figure 6-113. Transfer roller engaging motor (4 of 4) Exhaust fan (FAN1) removal 1. Remove the left cover. See Left cover removal. 2. Remove two connectors (1) from the DC controller PCB. 3. Unhook four claws (2) and pull the fan motor (3) out to remove it. Figure 6-114.
Circuit Boards Figure 6-115. Circuit board locations 1 2 3 4 5 6 DC controller PCB Memory controller PCB High-voltage power supply PCBs Low-voltage power supply PCB Formatter PCB Control panel PCB DC controller PCB removal NOTE When the DC controller PCB is replaced, in addition to replacing the PCB, a configuration procedure must be performed. For information on this configuration, refer to Chapter 8, Replacement parts configuration. 1. Remove the left cover. See Left cover removal. 2.
3. Remove four screws (1) and remove the PCB (2). Figure 6-116. DC controller PCB removal Formatter PCB removal The HP Color LaserJet 3500/3550 series printer and the HP Color LaserJet 3700 series printer have different formatter PCBs and formatter enclosures. The removal procedure for the PCB is different as described below. NOTE When the formatter PCB is replaced, in addition to replacing the PCB, a configuration procedure must be performed.
a. Disconnect two connectors (1), remove five screws (2), and remove the formatter enclosure cover (3). Figure 6-117. Formatter PCB (HP 3500/3550) removal (1 of 2) b. Remove seven screws (1) and remove the formatter PCB (2). Figure 6-118. Formatter PCB (HP 3500/3500) removal (2 of 2) c. 280 Remove the network interface card (if installed).
d. Disconnect one connector (1), remove two screws (2), and remove the formatter cover (3). Figure 6-119. Formatter PCB (HP 3700) removal (1 of 2) 3. Disconnect one connector (1), remove six screws (2), and remove the formatter PCB (3). Figure 6-120. Formatter PCB (HP 3700) removal (2 of 2) High-voltage power supply PCB removal 1. Remove the top cover. See Top cover removal. 2. Remove the upper rear door. See Upper rear door removal. 3. Remove the rear cover. See Rear cover removal. 4.
5. Disconnect two cables (1). (The formatter cage removal for the HP Color LaserJet 3500/3550 and 3700 series printers is slightly different. (Refer to the figure below, either HP 3500/3550 or the HP 3700 for the specific printer formatter cage being removed.) 6. Remove four screws (2) from the side of the cage. Figure 6-121. HP 3500/3550 and HP 3700 Figure 6-122. High-voltage power supply PCB removal (1 of 5) 7.
8. Remove the formatter cage (3) (while removing the cage for the HP 3500/3550, release the cable tie (4). Figure 6-123. High-voltage power supply PCB removal (2 of 5) 9. Disconnect two connectors (1), remove two screws (2), press down on the claw (3), and pull the fan assembly (4) out from the printer. Figure 6-124. High-voltage power supply PCB removal (3 or 5) 10.
11. Remove four screws (2) and remove the DC controller PCB/plate (3) from the printer. While removing the controller PCB/plate, remove the cables from the remaining harness clamps. Figure 6-125. High-voltage power supply PCB removal (4 of 5) 12. Remove three screws (1), unhook eight claws (2) (working from the top down), pull out on the bottom sides of the PCB to release two pins (3), and then lift up to release it from the lower support (4).
Low-voltage power supply PCB removal 1. Remove the formatter. See Formatter PCB removal. 2. Remove two screws (1). 3. Pull the low-voltage power supply PCB toward you about two inches. Disconnect the switch rod (2) from the power switch on the PCB as you pull it out. Reinstallation tip Remember to put the switch rod back into the power switch when reassembling the power supply unit. Figure 6-127.
4. Disconnect four connectors (1) and remove the power supply (2). Figure 6-129. Low voltage power supply PCB removal (2 of 2) Memory controller PCB removal 1. Open the front door, remove the transfer unit, and the print cartridges. See Transfer unit removal and Print cartridge removal. 2. Disconnect the left rod bracket from the front door by removing two screws from the bracket. See Pick-up/feed assembly removal, step 4. 3. Remove two screws (1) and pull the shield plate (2) out.
4. Release one claw (1) at the top of the PCB (2) and swing the right side of the PCB out (3). Then pull it to the right to free it from the retainer tab (4) and support tab (5). Disconnect the cable (6) at the top as you remove the PCB. Reinstallation tip When installing the memory controller PCB, install the cable first, then set the PCB on the bottom tab (5) (shown in the figure above).
Miscellaneous parts This section describes replacement for those parts not described in other sections. Swing rod guide, left removal 1. Remove the left swing guide. See Swing guide removal, left. 2. Remove the ground (1) wire from the guide. Use needle-nose pliers to pull the ground wire out of the contact (2). Reinstallation tip Remember to reconnect the ground wire to the contact (2). Use needle nose pliers to insert the wire back into the clip. 3. Remove the cables (3) from the guide. 4.
2. Remove three springs (1) from inside, located under the left swing guide. (The left swing guide is not shown for illustration purposes only.) Remove these springs carefully; they are delicate and can be easily damaged. Figure 6-133. Developing contact assembly removal (1 of 3) 3. Remove the plastic cover (1) by pressing in on two tabs (2) and pulling the cover out of the printer. Figure 6-134. Developing contact assembly removal (2 of 3) 4.
5. Pull out on the top of the assembly while pressing in on two tabs (2). Once the top is released, pull up slightly and outward to remove the developing contact assembly (3). As you remove the assembly, unroute the grounding wire (4). Reinstallation tip When installing the developing contact assembly, install the tab at the bottom of the assembly into the slot in the frame, then insert and latch the two tabs (2) at the top. Figure 6-135.
Tray 2 (cassette) parts removal The following section describes the removal procedures for Tray 2 and associated parts, including the right guide in the printer. Tray 2 (cassette) The separation pad and the end plate are the only replaceable components on the tray. Replacement of any other component requires replacement of the entire tray. For replacement of the separation pad, see Tray 2 separation pad removal.
8. Remove eight screws (1) from the printer's bottom plate (2) and remove the plate. Figure 6-137. Right Tray 2 guide removal (2 of 6) 9. Release the duplex guide pan by lifting up on the release lever (1), then swing the pan (2) down. Observe the grounding spring (3) while swinging the pan down. The spring should slide out of the slot (4). Figure 6-138.
10. Lower the duplex guide pan (1) until it is perpendicular with the base of the printer and pull it straight out (2) to remove it. Reinstallation tip Ensure that the grounding spring (3) on the left side is connected to the contact (4). Figure 6-139. Right Tray 2 guide removal (4 of 6) 11. Remove two screws (1) from the duplex position guide assembly (2) and remove it. Figure 6-140.
12. Remove two screws (1) and remove the tray guide (2). Figure 6-141. Right tray guide removal (6 of 6) Cassette (Tray 2) guide, right, removal (HP 3500/3550) 1. Remove Tray 2. 2. Remove two screws (1) and remove the duplex guide (2) from the back of the printer. Figure 6-142. Right Tray 2 guide removal (1 of 3) 3. Turn the printer on its back.
4. Remove eight screws (1) from the bottom plate (2) and remove the plate. Figure 6-143. Right Tray 2 guide removal (2 of 3) 5. Remove two screws (1) from the right tray guide and remove the guide (2). Figure 6-144.
500-Sheet paper feeder (Tray 3) covers This section describes the removal and replacement procedures for the 500-sheet paper feeder covers. Figure 6-145. 500-Sheet feeder cover locations 1 2 3 Right cover Left cover Front cover Front cover removal - 500-sheet paper feeder 1. Remove Tray 3. 2. Remove the 500-sheet paper feeder right and left covers. See Right cover removal - 500sheet paper feeder and Left cover removal - 500-sheet paper feeder. 3.
Right cover removal - 500-sheet paper feeder 1. Remove Tray 3. 2. Lift up to release two pins (1) and pull the top edge of the cover (2) in the direction of the arrow to remove the cover (3). Figure 6-147. 500-sheet paper feeder right cover removal Left cover removal - 500-sheet paper feeder 1. Remove Tray 3. 2. Lift up on the top edge of the cover to release two pins (1) and pull the edge in the direction of the arrow (2) to remove the cover (3). Figure 6-148.
500-Sheet paper feeder internal parts 1 2 3 500-Sheet paper feeder pick-up roller 500-Sheet paper feeder pick-up drive unit 500-Sheet paper feeder separation pad Pick-up roller removal - 500-sheet paper feeder 1. Remove Tray 3. 2. Turn the 500-sheet paper feeder over. 3. Move the left side of the roller unit (1) to the left (2), then pull it out and to the right (3). Figure 6-149.
Separation pad removal - 500-sheet paper feeder 1. Remove Tray 3. 2. Push the lifting plate (1) down. 3. Unhook the two claws (2) and remove the separation pad (3). Figure 6-150. 500-sheet paper feeder separation pad removal Pick-up drive unit removal - 500-sheet paper feeder 1. Remove the right cover. See Right cover removal. 2. Disconnect two connectors (1). 3. Release the cables from the cable guide (2). 4. Remove four screws (3) and remove the pick-up drive unit (4). Figure 6-151.
500-Sheet paper feeder sensor/solenoid/motor/PCB Figure 6-152. 500-Sheet paper feeder sensor/solenoid/motor/PCB locations 1 2 3 4 500-Sheet paper feeder PCB 500-Sheet paper feeder pick-up clutch (CL4) 500-Sheet paper feeder pick-up solenoid (SL3) 500-Sheet paper sensor (PS3) 500-Sheet paper feeder PCB removal - 500-sheet feeder 1. Remove the right cover. See Right cover removal. 2. Disconnect four connectors (1), remove one screw (2), and remove the 500-sheet feeder PCB (3). Figure 6-153.
Pick-up clutch (CL4) removal - 500-sheet feeder 1. Remove the right cover. See Right cover removal. 2. Disconnect one connector (1) and one spring (2). 3. Remove three screws (3) (look under the metal bracket for two of the three screws), and remove the sheet metal bracket (4). 4. Remove the swing unit (5). Figure 6-154. 500-Sheet paper feeder pick-up clutch removal NOTE The entire unit needs to be replaced for replacement of the pick-up clutch. Pick-up solenoid (SL3) removal - 500-sheet feeder 1.
Paper sensor (PS3) removal - 500-sheet feeder 1. Remove Tray 3. 2. Turn the 500-sheet paper feeder over. 3. Remove two screws (1) and remove the lower front frame (2). Figure 6-156. 500-Sheet paper feeder front frame removal (1 of 3) 4. Press in on one claw by inserting a flat-blade screwdriver into the slot (1), at the same time, pry up at slot (2) to release the cover (3), then swing the left side of the cover out to remove it. Figure 6-157. 500-Sheet feeder paper sensor removal (2 of 3) 5.
7 Troubleshooting Chapter contents This chapter contains the following sections: Chapter contents ...................................................................................................................303 Introduction ............................................................................................................................306 Troubleshooting process .......................................................................................................
Calibrating the printer .....................................................................................................383 Using Color ...........................................................................................................................384 HP ImageREt 2400 .........................................................................................................384 Paper selection ......................................................................................................
Printing a menu map ......................................................................................................407 Information menu ............................................................................................................407 Paper handling menu .....................................................................................................408 Configure device menu ...................................................................................................
Introduction This troubleshooting chapter assumes the reader has a basic understanding of the color laser printing process. Explanations of each mechanical assembly, printer system, and the basic theory of operation are found in Chapter 5. Do not perform any of these troubleshooting processes without fully understanding the function of each mechanism. This chapter contains the following sections: 306 ● Troubleshooting process includes a pre-troubleshooting checklist and a troubleshooting flowchart.
Troubleshooting process When the printer malfunctions or encounters an unexpected situation, the printer control panel alerts you of the situation. This section contains a pre-troubleshooting checklist to filter out many possible causes of the problem. A troubleshooting flowchart helps you diagnose the root cause of the problem. The remainder of this chapter provides steps for correcting problems.
Table 7-1. Pre-troubleshooting checklist (continued) Transfer unit and fuser ● Are the transfer unit and fuser properly installed? Covers ● Is the front door closed? Condensation ● Does condensation occur following a temperature change (particularly in winter following cold storage)? If so, wipe affected parts dry or leave the printer on for 10 to 20 minutes.
A “no” answer indicates that additional testing is needed. Proceed to the referenced section in this chapter, and follow the instructions. After completing this additional testing, proceed to the next major step in the troubleshooting flowchart.
NOTE If the printer’s display is blank, but the power-on checks pass, try printing an engine test page to determine whether the problem is with the engine/display or with the formatter. See Engine test page for instructions. Troubleshooting power-on When you turn on the printer, if it does not make any sound or if the control panel display is blank, check the following items: 1.
6. Make sure the control panel display is connected. 7. Check the two fuses on the power supply. 8. If necessary, replace the power supply. 9. If necessary, replace the DC controller.
Printer error troubleshooting The following tables explain messages that might appear on the printer control panel. Alphabetical printer messages and their meanings are listed in the Table 7-2. Alphabetical printer messages table, and numerical printer messages are listed in the Table 7-3. Numerical printer messages table. NOTE Not all messages are described in the tables; those messages that are not listed are selfexplanatory. Status messages Status messages reflect the current state of the printer.
Table 7-2. Alphabetical printer messages Message Description Action Access Denied An attempt has been made to modify a menu item while the control panel security mechanism is enabled by the printer administrator. The message will disappear shortly, and the printer will return to the Ready or BUSY state. Contact the printer administrator to change settings. Calibrating... The printer is calibrating. No action necessary. Calibrating... The printer is calibrating the media sensor.
Table 7-2. Alphabetical printer messages (continued) Message Description Action Clearing paper path HP 3700 only. No action necessary. The printer detected jammed or misplaced paper when turned on and is attempting to eject jammed pages. Close front door. The front door needs to be closed. 1. Close the front door. Damaged door open detection switch actuator. 2. Replace the door open detection switch actuator (the switch arm for the front cover and right frame). 3.
Table 7-2. Alphabetical printer messages (continued) Message Description Action FLASH FILE HP 3700 only. 1. SYSTEM IS FULL The printer received a PJL file system command that attempted to store something on the file system but was unsuccessful because the file system is full. Use HP Web Jetadmin software to delete files from the Flash Memory and try again. 2. To remove this message from the display, press . 3. See HP Web Jetadmin, Chapter 3. 1.
Table 7-2. Alphabetical printer messages (continued) Message Description Action INCORRECT CARTRIDGE A color cartridge is installed in an incorrect slot or the cartridge is the wrong type, and the cover is closed, or either the memory controller PCB or the DC controller PCB are defective. 1. alternates with For help press Incorrect supplies For status press At least one supply item is incorrectly positioned in the printer and another supply item is missing, incorrectly placed, out, or low.
Table 7-2. Alphabetical printer messages (continued) Message Description Action INSTALL FUSER The fuser is either not installed or not correctly installed in the printer, the connector between the fuser and the printer is not connected properly, there is a break in either the main thermistor or the fuser heater, or the DC controller PCB is faulty. 1. Press 2. Make sure the fuser is correctly seated in its slot. See Fuser removal (in Chapter 6) for more information. 3. Reseat the fuser.
Table 7-2. Alphabetical printer messages (continued) Message Description Action Loading HP 3700 only. No action necessary. program X Programs and fonts can be stored on the printer file system and are loaded into RAM when the printer is turned on. The number X specifies a sequence number indicating the current program being loaded.
Table 7-2. Alphabetical printer messages (continued) Message Description Action No job to cancel This message is displayed when the user presses the Stop key but there is no active job or buffered data to cancel. This message is displayed for two seconds before the printer is returned to the READY state. No action necessary. NON HP SUPPLY Not made by HP. This message is displayed until an HP supply is installed or is pressed. (This message is displayed in the event log as 10.30.xx).
Table 7-2. Alphabetical printer messages (continued) Message Description Action ORDER FUSER KIT The fuser is near end of life. The printer is ready and will continue for the estimated number of pages indicated. Order the fuser kit. Printing can continue until REPLACE FUSER KIT is shown. alternates with LESS THAN X PAGES or Press alternates with for help. See Ordering parts (in chapter 8) for more information. Ready For help press Order Supplies More than one supply item is low. 1.
Table 7-2. Alphabetical printer messages (continued) Message Description Printing... The printer is generating the demo page. No action necessary. The printer will return to the online Ready state when the page is completed. DEMO PAGE Printing... ENGINE TEST Printing... EVENT LOG This message is displayed while the engine test page is being printed, initiated by pressing the engine test button on the DC controller PCB. Action No action necessary.
Table 7-2. Alphabetical printer messages (continued) Message Description Action Processing... The printer has experienced a period of heavy use. To maintain a supported operating temperature, the printer will print and pause in one-minute intervals. No action necessary. The printer is currently processing a job but is not yet picking pages. When paper motion begins, this message will be replaced by a message that indicates which tray the job is being printed from. No action necessary.
Table 7-2. Alphabetical printer messages (continued) Message Description Action Ready The printer is online and ready for data. No action necessary. Diagnostics mode No status or device attendance messages are pending at the display. alternates with To exit press STOP key Ready The printer is online and ready for data. No action necessary. No status or device attendance messages are pending at the display. Receiving A firmware upgrade is in progress.
Table 7-2. Alphabetical printer messages (continued) Message Description Action REPLACE FUSER KIT The fuser is near end of life and the SUPPLIES LOW setting in SYSTEM SETUP is set to STOP. 1. Order the fuser kit. 2. Press to continue printing. Printing can continue until REPLACE FUSER KIT is reached. alternates with To continue press or Press for help. See Ordering parts (in chapter 8) for more information.
Table 7-2. Alphabetical printer messages (continued) Message Description Action Request accepted The printer has accepted a request to print an internal page, but the current job must finish printing before the internal page will print. No action necessary. The firmware upgrade was not completed successfully. Attempt upgrade again. For the HP 3700 printer, you might need to use the parallel port to send the upgrade file. The printer is restoring factory settings. No action necessary. Restoring...
Table 7-2. Alphabetical printer messages (continued) Message Description Action TRAY X OPEN OR EMPTY The specified tray is open or is empty and needs to be filled. If the tray is not open or has paper installed, a problem may exist with the sensor, sensor connections, or the DC controller PCB. If the tray has paper or is closed and the paper guides are in the correct position, perform the following action for the specified tray: Tray 1 (multipurpose tray) 1.
Table 7-2. Alphabetical printer messages (continued) Message Description Action UNAUTHORIZED SUPPLY The printer has detected that a nonHP supply is currently installed and press (override) was pressed. If you believe you purchased an HP supply, please call the HP fraud hotline at 1-877-219-3183. IN USE alternates with Service or repairs required as a result of using non-HP supplies are not covered under HP warranty. Ready UNSUPPORTED DATA ON HP 3700 only.
Table 7-3. Numerical printer messages Message Description Action 10.XX.YY SUPPLY 1. Open and close the front door. 2. Ensure the cartridges are fully seated. alternates with The printer cannot read or write to at least one print cartridge memory tag, or at least one memory tag is missing. 3. For help press XX Description: Swap the cartridge for the color indicated with a cartridge in another slot to determine whether the error follows the cartridge or stays with the slot.
Table 7-3. Numerical printer messages (continued) Message ENWW Description Action Four color slippage bands occur across the ITB belt because the right side cleaning blade shipping tab is out of position. This can cause interference with the yellow cartridge, where the cleaning blade shipping tab contacts the OPC white plastic hub and the OPC ground contact adjacent to the OPC hub.
Table 7-3. Numerical printer messages (continued) Message 330 Chapter 7 Troubleshooting Description Action Error occurs at power up and can be caused by: Perform the following steps: ● Cartridges not seated correctly. ● Damaged cartridge shutter arm. ● Broken ITB coupling lever on the front door (front door engaging tab). ● Broken cartridge alignment knob. ● Left rail guide out of place or missing. ● Left arm drum lock is broken. ● ITB gears are not aligned. 1.
Table 7-3. Numerical printer messages (continued) Message Description Action 1. Check if the left rail guide is in place. If it is not in place, replace it (part number: RC1-1642-000CN. 2. If the left guide is out of place and is put back in place, ensure the left arm guide is working properly (slides in the guide rail). 3. If the Left Guide rail has been replaced, check the left arm drum lock. If the part is broken, it will be in the down position and the cartridge can not be inserted.
Table 7-3. Numerical printer messages (continued) Message Description Action 13.90.00 JAM INSIDE There is a jam inside the front door caused by incompatible transparencies. Press FRONT DOOR alternates with for help. or See Paper path troubleshooting, later in this chapter for more information. REMOVE INCOMPATIBLE CAUTION: Use only transparencies specified for use with HP Color LaserJet printers. Noncompatible transparencies can damage the printer.
Table 7-3. Numerical printer messages (continued) Message Description Action 13.XX.YY JAM IN A page is jammed in tray X. Press for help. TRAY X or alternates with See Paper path troubleshooting, later in this chapter. For help press NOTE Clear jam then press If Jam Recovery is set to OFF some pages will not be reprinted. Re-send the missing pages. 20 INSUFFICIENT MEMORY The printer has received more data from the computer than fits in available memory. 1. Press to continue printing.
Table 7-3. Numerical printer messages (continued) Message Description Action 40 EIO X BAD HP 3700 only when an EIO device is installed. Press TRANSMISSION alternates with To continue press 41.3 UNEXPECTED SIZE IN TRAY X A connection with the card in the EIO slot has been abnormally broken. Paper is loaded that is longer or shorter in the feed direction than the size configured for the tray. alternates with NOTE A loss of data will occur. 1. Load the paper as instructed. 2. Press 3.
Table 7-3. Numerical printer messages (continued) Message Description Action 41.X A printer error has occurred. PRINTER ERROR X Description: 1. Press to continue or press information. alternates with 2 - Beam detect misprint error. To continue press 3 - Media feed error (size) 5 - Media feed error (type) 7 - Feed delay error for more 2. If the message persists after exiting help, turn the printer off and then back on. 3. Perform the following actions for the indicated errors: 41.
Table 7-3. Numerical printer messages (continued) Message Description Action 41.7 error - occurs when a page is jammed in the paper path. See Paper path troubleshooting, later in this chapter. If the error reoccurs, perform the following steps: 1. Check that your paper meets HP specifications, see the Media Specification guide at http://www.hp.com 2. Check the separation pads and replace if worn. Replacement part numbers: 3.
Table 7-3. Numerical printer messages (continued) Message Description Action 49.XXXX A critical firmware error has occurred that caused the processor on the formatter to abort operation. This type of error can be caused by invalid print commands, corrupt data, or invalid operations. In some cases, electrical noise in the cable can corrupt data during transmission to the printer. Other causes include poor quality parallel cables, poor connections, or homegrown applications.
Table 7-3. Numerical printer messages (continued) Message Description Action 50.X FUSER ERROR A fuser error has occurred. alternates with X Description For help press 1 - low fuser temperature WARNING: The fuser is HOT. Turn the printer off and allow it to cool for approximately 10 minutes before removing the fuser. 2 - fuser warmup service 3 - high fuser temperature 4 - faulty fuser 8 - low fuser temperature (subthermistor 9 - high fuser temperature (subthermistor) 50.
Table 7-3. Numerical printer messages (continued) Message 50.X FUSER ERROR Description Action 50.3 error - Fuser Failure (Abnormally High Temperature Main Thermistor) 1. The connector between the fuser and the printer is not connected properly. Reseat the fuser. Check the connector J5013 between the fuser and the printer. Replace it if damaged. 2. Short in the main thermistor. Turn the printer off and remove the fuser.
Table 7-3. Numerical printer messages (continued) Message Description 50.X FUSER ERRORcontinued Action 50.9 error - Fuser Failure (Abnormally High Temperature Sub Thermistor) 1. The connector between the fuser and the printer is not connected properly. Reseat the fuser. Check the connector J5013 between the fuser and the printer. Replace it if damaged. 2. Short in the sub thermistor. Turn the printer off and remove the fuser.
Table 7-3. Numerical printer messages (continued) Message Description Action 53.XY.ZZ CHECK HP 3700 only 1. Press STOP. DIMM A Bank B An error occurred in printer memory. alternates with Values of A and ZZ are: Press STOP to continue A Device Location: See Installing memory and font DIMMs in chapter 3 for DIMM installation information. 1 - DIMM Slot 1 (bottom slot) 2. Check the ZZ error number for the specific DIMM, then: 2 - DIMM Slot 2 - Reseat the DIMM.
Table 7-3. Numerical printer messages (continued) Message Description Action 54.XX PRINTER A printer command error has occurred. 1. Turn the printer off and then back on. ERROR NOTE Some messages are displayed in the event log and some are displayed on both the control panel and in the event log, as identified below. XX Description: (Event log only messages) 01 - humidity environmental sensor error 05 - media sensor error 06 - Dmax density sensor out of range 2.
Table 7-3. Numerical printer messages (continued) Message Description Action 54.XX PRINTER 33.0X Scanner Beam Detect adjustment abnormality warning X is the scanner number: 54.15 ERROR continued 1 = yellow/magenta scanner 2 = cyan/black scanner 54.16 54.17 54.18 54.20 Color misregistration sensor abnormality 1. The connectors between the color misregistration sensor (CPR) and the DC controller PCB are not connected properly.
Table 7-3. Numerical printer messages (continued) Message Description Action 54.31 - Media Sensor Abnormality/ Afteradjustment Value Out of Spec 1. Try to calibrate the media sensor again. 2. Dirty media sensor. Clean the media sensor. 3. The connectors in the media detection signal line are not properly connected. Reseat the media sensor connector J601, relay connector J5026, and DC controller PCB connector J1008. 4. Defective media sensor. Replace the media sensor. 5. Defective DC controller PCB.
Table 7-3. Numerical printer messages (continued) Message Description Action 55.X The DC controller is not communicating with the formatter. The problem could be caused by a timing error or an intermittent connection. 1. Press 2. If the message persists, turn the printer off and then back on. 3. Reseat or replace the connectors between the DC controller and the formatter. 4. If the problem persists, replace the DC controller PCB. 5. Replace the formatter.
Table 7-3. Numerical printer messages (continued) Message Description Action 59.XYcontinued A printer motor error has occurred. X and Y are detailed below. Turn the printer off and then back on. PRINTER ERROR alternates with To continue turn off then on X Description: 5 - Primary transfer roller engaging motor (M5) startup error. 6 - Primary transfer roller engaging motor (M5) rotation error. 7 - Developer motor (M4) startup error. 8 - Developer motor (M4) rotation error.
Table 7-3. Numerical printer messages (continued) Message Description Action 59.7Y Control Panel Message 59.07.00 - (HP 3700 only; event log only) 59.07.ZZ - (HP 3500/3550 only; event log only) ZZ is color: 00 - Black 01 - Cyan 02 - Magenta 03 - Yellow 59.8Y Control Panel Message 59.08.00 - (HP 3700 only; event log only) 59.08.ZZ - (HP 3500/3550 only; event log only) ZZ is color: 00 - Black 01 - Cyan 02 - Magenta 03 - Yellow 1.
Table 7-3. Numerical printer messages (continued) Message Description Action 59.XYcontinued 59.90 and 59.A0 Errors on control panel PRINTER ERROR 59.09.00 (event log only) alternates with To continue turn off then on 59.10.00 (event log only) An error occurred when the drum motor started or while the drum motor was rotating. 1. The connectors in the drum motor drive signal line are not connected properly. Reseat the drum motor connector J5002 and the DC controller PCB connector J1019. 2.
Table 7-3. Numerical printer messages (continued) Message Description Action 59.C0 Error on control panel Unable to move the right swing guide arm all the way back due to a missing "t". If any of these "t's" are missing, replace the right swing guide. These "t's" are white plastic pieces shaped like a "t" inserted into the right swing guide. 59.12.00 (event log only) An error occurred in the developing engaging mechanism. 1. The movement of the developing engaging lever is not smooth.
Table 7-3. Numerical printer messages (continued) Message Description Action 62 NO SYSTEM No system was found. 1. Turn the printer off and then back on. 2. HP 3700 only - reseat the firmware DIMM. Make sure it is in slot 1 (the bottom slot). 3. Download new firmware (HP 3700 - try downloading through the parallel port). 4. Replace the firmware DIMM. 1. Turn the printer off and then back on. For help press 2. Perform a cold reset. alternates with 3.
Table 7-3. Numerical printer messages (continued) Message Description Action 8X.YYYY HP Color LaserJet 3700 series printer only. 1. Turn the printer off and then back on. EIO ERROR 99 ERROR 2. Reseat the EIO card. The EIO accessory card in slot X has encountered a critical error. 3. Replace the EIO card. (Event log only) Resend firmware upgrade. RFU (remote firmware upgrade) failed.
Replacement parts configuration When the parts in the list below are replaced, specific tasks need to be performed.
Formatter (previously installed in another printer) replacement configuration When the formatter PCB is being replaced with one that was installed in another printer, an NVRAM initialization will need to be performed. Before doing an NVRAM INIT, print a configuration page and a supplies status page in the INFORMATION menu to obtain the page counts, counts for any of the supplies, serial number, and the born-on date.
DC Controller (previously installed in another printer) replacement configuration To ensure optimum print quality, the printer needs to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting CONFIGURE DEVICE / PRINT QUALITY / CALIBRATE NOW, see Calibrate Now. Light intensity of the media sensor must be adjusted. Follow the procedure below to adjust the light intensity. 1. Turn the printer OFF. 2. Open the front cover. 3.
Color Misregistration Sensor (PS12) replacement configuration To ensure optimum print quality, the printer will need to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting CONFIGURE DEVICE / PRINT QUALITY / CALIBRATE NOW. Laser/scanner Assembly replacement configuration To ensure optimum print quality, the printer will need to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting CONFIGURE DEVICE / PRINT QUALITY / CALIBRATE NOW.
Paper path troubleshooting Jam error messages occur if paper fails to arrive at or clear the paper path sensors in the allowed time. Dedicated paper sensors detect whether paper is present in the sensor and if paper is fed normally. When the DC controller detects a jam, it immediately stops the printing process and displays the appropriate jam message for the sensor that detects the jam. The location of all paper path sensors is shown in the figure below.
Paper path jam areas Jams occur in the areas shown in the figure below. Jam messages on the control panel correlate with these areas. For instructions on clearing jams, see the following sections in this chapter. Figure 7-1.
Table 7-4. Error messages and associated jam locations Error message Event log code Action Location/ Action Go to jam Location areas: 13.01.00 (HP 3500/3550) 13.01.00 13.20.00 (HP 3700) Pick-up delay jam This printer checks the paper movement at all pickup sources twice, if necessary, since the paper pickup can be delayed due to a pickup error. When paper does not reach the registration paper sensor (PS4) within time T after paper pickup, the CPU judges it the pickup delay jam.
Table 7-4. Error messages and associated jam locations (continued) Error message Event log code Action Location/ Action Go to jam Location areas: 13.0A.00 (HP 3500/3550) 13.0A.00 When the paper does not pass 6 - fuser/facethe face down paper sensor down delivery (PS8) within time T after paper area has reached the fuser delivery paper sensor (PS7), the CPU judges it a delivery stationary jam. 13.10.
Table 7-4. Error messages and associated jam locations (continued) Error message Event log code Action Location/ Action Go to jam Location areas: Note: Residual paper jam n/a If paper is detected by sensors other than PS6 and PS7, the DC controller delivers the paper automatically. check all jam locations Paper path areas jam troubleshooting Paper jam troubleshooting information is provided in this section for the six paper areas identified in Figure 7-1.
Table 7-6. Causes for jams in the Tray 1 pick-up area (continued) Cause Solution Defective feed motor Replace the feed motor. Defective DC controller PCB. Replace the DC controller PCB. Area 2: Tray 2 jam troubleshooting Removing paper jams located in the Tray 2 (cassette) area requires removing the paper tray then removing any paper stuck in the tray input area. Check the area inside the tray opening to ensure that all paper has been removed. Table 7-7.
Table 7-8. Causes for jams in the fuser/face-down delivery area (continued) Cause Solution Defective paper feeder pickup solenoid. Disconnect the paper feeder pickup solenoid connector J4002 from the paper feeder. PCB. Measure the resistance between the connector J4002-1 (SL) and J4002-2 (+24VA). If it is not approx. 160 ohms, replace the paper feeder pickup solenoid. Defective paper feeder pickup clutch. Disconnect the paper feeder pickup clutch connector J4003 from the paper feeder PCB.
1. Open the front door. CAUTION Do not place anything on the transfer unit. Do not touch the top of the transfer unit or the contacts on the left side of the transfer unit. 2. Remove the magenta and yellow print cartridges. 3. If necessary, turn the green roller wheel toward the rear of the printer to advance the paper. Remove any paper. NOTE If the paper tears, make sure that all paper fragments are removed from the paper path before resuming printing. 4.
1. Lift the latch (1) on the printer front door and open the door (2). Figure 7-2. Printer front door CAUTION Do not place anything on the surface of the transfer unit. Also, do not touch the transfer unit contacts located on the left side of the unit. 2. Remove the transfer unit (1) by grabbing the blue handles (2) on both sides of the transfer unit. With your right thumb press and hold the lever (3) on the right side handle then lift the handle up (4), followed by lifting the left side (5).
3. Remove the yellow and magenta cartridges (1) from the printer by grabbing the blue handle (2) on the cartridge and pulling it upward and out. 4. Close the front door approximately half-way, matching the arrow on the right door bracket (1) with the arrow on the inside of the printer (2). 5. Remove any visible paper from inside the printer’s transfer area.
6. Locate the top flat bar (1) and pull up on the white tab marked with black dots (2) to raise the bar to a vertical position (3). The bar will remain vertical. NOTE Do not touch the registration sensor lenses (4). 7. Raise the bottom media sensor bar (1) by pulling on the white tabs marked with the black dots (2), located on either side of the sensor. NOTE 366 Do not touch the registration sensor lenses (3) or the media sensor (1).
8. While holding the media sensor bar upright, remove any visible pieces of paper (1). 9. When the paper is removed, lower the bottom media sensor bar back down into place. 10. Swing the top flat bar down into place over the bottom media sensor bar. 11. Open the front door to its fully open position and reinstall the yellow and magenta cartridges. 12. Reseat the transfer unit by holding the blue handles and inserting the left side first.
To diagnose the cause of wrinkled or folded paper, use the Print/Stop Test in the Diagnostics test menu. Adjust the stop time so the paper stops before it enters the fuser. Open the front door. If paper is wrinkled at this stage, use Table 7-10. Causes for wrinkled or folded paper (paper path entrance), Table 7-10. Causes for wrinkled or folded paper (paper path entrance), to diagnose the problem. If paper is not wrinkled at this stage, use Table 7-11.
Area 5: Duplex jam troubleshooting Table 7-13. Causes for jams in the duplex area (HP 3700 (only) Cause Solution Scratched/Dented duplex feed guide. If damaged or dented, replace the duplex feed guide. Worn/Deformed oblique roller. If worn or deformed, replace the oblique roller. Damaged oblique roller drive gears Check the oblique roller drive gears in the transfer unit block. Replace the gear if damaged or worn. Defective duplex feed paper sensor lever.
3. On the left side of the tray opening, pull the green lever straight forward until the metal paper-access plate (duplex pan) drops. 4. Remove any jammed paper. 5. Press the metal access plate (duplex pan) up until it locks in place. 6. Replace Tray 2. 7. Press to resume printing Area 6: Fuser/face-down delivery jam troubleshooting Table 7-14. Fuser/face-down delivery area 370 Cause Solution If the jam has occurred around the fuser area, a defective fuser delivery sensor is likely.
Table 7-14. Fuser/face-down delivery area (continued) Cause Solution Defective face down delivery sensor lever. Reseat the face-down delivery sensor lever if it does not move smoothly or it is out of position. Replace the lever if damaged or deformed. Defective fuser delivery sensor lever. Reseat the fuser delivery sensor lever if it does not move smoothly or it is out of position. Replace the lever if damaged or deformed. The rotation of the fuser sleeve or pressure roller is not smooth.
2. Open the upper rear door. 3. Remove any paper. 4. Close the rear door. 5. If no paper is visible, open the lower rear door (rear output bin).
6. Press down on the green levers and remove any paper. Return the green levers to the up position after removing the page. 7. Close the lower rear door. Fuser area jams (area 6) 1. Open the lower rear door (rear output bin). NOTE Make sure the green pressure levers are not in the down position. If the green pressure levers are down, they can cause a jam message to display on the printer control panel. 2. If the paper is visible, press down on the green levers and remove the paper.
3. If the paper is not visible, turn the printer off. 4. Slide out the lower rear door (rear output bin) tray extender. 5. Remove the lower rear door (rear output bin) by lifting and pulling the right side of the door while pressing the tab with the ridges on the left side of the door. WARNING! The fuser is hot! Wait ten minutes after turning the printer off before removing the fuser. 6. Place your thumbs on the blue ridges (near the warning label), and using your fingers, pull up on the blue latches.
7. Pull the fuser out of the printer. 8. On the fuser, squeeze and lift the black tabs to open the shutter door. WARNING! Do not open the fuser shutter door while the fuser is in the printer. 9. Remove any jammed paper NOTE If the paper tears, make sure that all paper fragments are removed from the paper path before you resume printing. 10. Hold the fuser with your thumbs on the blue ridges and your fingers on the blue latches. Push both sides of the fuser into the printer.
11. Press the black ridges on the front of the fuser until the fuser clicks into place. 12. To reattach the lower rear door (rear output bin), hold the door at a 45-degree angle, and fit the peg into the round hole on the right side. 13. Press the ridges on the tab on the left side of the door, and fit the peg into the round hole. 14. Close the lower rear door (rear output bin). Turn the printer on. Lower rear door area jams (area 6) 1. Open the lower rear door (rear output bin).
2. Press down on the green levers and remove any paper. 3. Lift the green levers and close the lower rear door. 4. If printing does not resume, press . Paper jam recovery feature This printer automatically provides paper jam recovery, a feature that allows you to set whether the printer should attempt to automatically reprint jammed pages. The options are: NOTE ● AUTO Printer will attempt to reprint jammed pages. ● OFF Printer will not attempt to reprint jammed pages.
Table 7-15. Common causes of paper jams Issue Cause Solution Common causes of paper jams Paper does not meet HPrecommended paper specifications. Use only paper that meets HP specifications. See Supported media weights and sizes. A supply item is installed incorrectly, causing repeated jams. Verify that all print cartridges, the transfer unit, and the fuser are correctly installed. You are reloading paper that has already passed through a printer or copier.
General paper path troubleshooting Use the following suggestions to isolate the cause of the problem. Once you have identified the cause, use the tables that follow to find a recommended solution. NOTE Use the paper path test in the Diagnostics menu to print pages while troubleshooting. See Paper Path Test section later in this chapter for information about the paper path test. ● View or print the event log and determine if a particular jam error occurs more often than others. Try to identify a pattern.
Persistent jams If jams occur repeatedly, use the information in this section to diagnose the root cause of the problem. The tables in this section list possible causes and recommended solutions for jams in each area of the paper path. Items are listed in the order you should investigate. In general, items at the beginning of the list are relatively minor repairs. Items at the end of the list are more significant repairs.
Image formation troubleshooting The section identifies some things that can result in poor print quality. For additional information, refer to the HP LaserJet Printer Family Print Media Guide. Print quality problems associated with media Some print quality problems arise from use of inappropriate paper. ● Use paper that meets HP paper specifications. See Supported media weights and sizes. ● The surface of the paper is too smooth. Use paper that meets HP paper specifications.
NOTE If the printer’s media sensor rejects a supported Color LaserJet transparency, make sure the transparencies are not from an old box. Try transparencies from a new box. ● In the printer driver Paper tab, select Transparency as the paper type. Also, make sure that the tray is correctly configured for transparencies. ● Check that the transparencies meet the specifications for this printer. See Supported media weights and sizes, in chapter 1.
Print quality troubleshooting pages Use the built-in print quality troubleshooting pages to help diagnose and solve print quality problems. 1. Press MENU to enter the MENUS. 2. Press to highlight DIAGNOSTICS. 3. Press to select DIAGNOSTICS. 4. Press to highlight PQ TROUBLESHOOTING. 5. Press to print the pages. The printer returns to the Ready state after printing the print quality troubleshooting pages.
Using Color The HP Color LaserJet 3500/3550 series printer and the HP Color LaserJet 3700 series printer offer great color printing as soon as you set up the printer. They provide a combination of automatic color features to generate excellent color results for the general office user. Also, the HP Color LaserJet 3700 series printer provides sophisticated tools for the professional who is experienced with using color.
NOTE Factors such as the type of monitor you use and the room’s lighting can affect the appearance of colors on your screen. For more information, see Managing color. The latest versions of Adobe PhotoShop®, CorelDRAW, Microsoft Office, and many other applications use sRGB to communicate color.
Managing color Setting color options to Automatic will typically produce the best possible print quality for color documents. However, there may be cases when you want to print a color document in grayscale (black and white) or wish to change one of the printer's color options. Using Windows, print in grayscale or change the color options using settings found on the Color tab in the printer driver.
The Neutral Grays setting determines the method used for creating gray colors used in text, graphics, and photographs. For the HP Color LaserJet 3700 series printer, the following options are available for the Neutral Grays setting: ● Black Only generates neutral colors (grays and black) using only black toner. This guarantees neutral colors without a color cast. ● 4-Color generates neutral colors (grays and black) by combining all four toner colors.
Matching colors The process of matching printer output color to your computer screen is quite complex because printers and computer monitors use different methods of producing color. Monitors display colors by light pixels using an RGB (red, green, blue) color process, but printersprint colors using a CMYK (cyan, magenta, yellow, and black) process. Several factors can influence your ability to match printed colors to those on your monitor.
Adjusting color balance This printer features automatic color calibration to provide high-quality color output. In situations that require critical color control, you can manually adjust the density balance of the printer’s four toner colors. The available range for each color is from -5 to +5. The default value is 0. CAUTION This procedure should only be performed by your network administrator.
Image defects If specific defects occur repeatedly, print a Print Quality Troubleshooting page (see Print quality troubleshooting pages, in this chapter) and follow the instructions on the first page. If you are unable to resolve the problem, use the information in this section to identify the root cause of the problem. Image defects fall into the categories listed in Table 7-16. Image defects. Possible causes and recommended solutions for each of these categories are listed in the tables that follow.
Table 7-16. Image defects (continued) Image defect Description More information Blank spots Blank spots appear in image. See Table 7-31. Causes for blank spots Poor fusing Toner image is not fully fixed on paper. See Table 7-32. Causes for poor fusing Distorted Image Image is distorted. See Table 7-32. Causes for poor fusing Color misregistration Some color is misregistered. See Table 7-34. Causes for smearing Smearing Image smeared in whole or in part. See Table 7-35.
Light color Print out a solid filled image of the problem (light) color using an external device. In the course of printing, turn the printer off and take the problem color’s cartridge out. Manually open the cartridge shutter. If the toner image on the photosensitive drum is not fully transferred to the transfer unit, go to step B in the table below. If the toner image on the drum before transfer is light, go to step A. Table 7-18.
Table 7-19. Causes for dark images (continued) Cause Solution Dirty color misregistration sensor lens. Clean the color misregistration sensor lens. Defective color misregistration sensor. Replace the color misregistration sensor. Defective environmental sensor. Replace the environmental sensor. Defective DC controller PCB. Replace the DC controller PCB. Dark color Table 7-20.
Table 7-22. Causes for an all black or solid colored image (continued) Cause Solution Defective cartridge (primary charging roller). Replace the problem (solid) color’s cartridge. High-voltage PCB is defective. Replace the high-voltage PCB. DC controller PCB is defective. Replace the DC controller PCB. Calibrate the printer after replacing the DC controller. See Calibrate Now, later in this chapter. Dots in vertical lines Table 7-23.
Table 7-25. Causes for dirt on the front of the paper Cause Solution A Defective cartridge (deteriorated toner or scratches on the developing cylinder, photosensitive drum, or primary charging roller). Replace the cartridge of the color that matches the defect. B Repetitive dirt (dirty registration sub roller, fuser sleeve, feed sub roller, or face down delivery roller). Refer to the Table 7-39.
Horizontal line If the line appears in a particular color, go to step A. If it appears in full-color print, go to step B. Table 7-28. Causes for horizontal line A B Cause Solution The developing cylinder is deformed by being left engaged with the photosensitive drum for a long time. Refer to the Table 7-39. Repetitive defect cause table, later in this chapter, to find out if the interval of line agrees with that of a developing cylinder. If so, output about 20 pages of print to solve the problem.
Color missing Table 7-30. Causes for a missing color Cause Solution Defective laser shutter. Check the problem color laser shutter. Clean the shutter if dirty. Replace the shutter if deformed or damaged. Poor developing bias contacts. For the cartridge with the color problem (color missing) color’s cartridge, check the developing bias contacts to the high-voltage PCB. Clean contacts, if dirty. Replace defective parts if the contacts are deformed or damaged.
Table 7-32. Causes for poor fusing (continued) Cause Solution Fuser is not within nip width specifications. Refer to the Table 7-39. Repetitive defect cause, later in this chapter, to find out if the interval of the poorly fixed places agrees with that of a fuser sleeve. If so, replace the fuser sleeve unit. Replace the fuser. Fuser sleeve is scarred or damaged. Replace the fuser. Pressure roller is scarred or damaged. Refer to the Table 7-39.
Table 7-34. Causes for smearing (continued) A B Cause Solution Defective cartridge. Check if the photosensitive drum in the problem (misregistered) color’s cartridge rotates smoothly. If not, replace the cartridge. Worn/Chipped cartridge drive gears. Check drive gears connected into the problem (misregistered) color’s cartridge. If worn or chipped, replace the gear. Dirty color misregistration sensor. Clean the lens of the color misregistration sensor. Defective color misregistration sensor.
Table 7-36. Causes for a misplaced image (continued) Cause Solution DC controller PCB is defective. Replace the DC controller PCB. Calibrate the printer after replacing the DC controller. See Calibrate Now, later in this chapter. Reversed color Table 7-37. Causes for reversed color Cause Solution The FFC (flat cable) that connects the DC controller to the formatter is not correctly connected. Reseat the FFC to the DC controller PCB J1001. Defective DC controller PCB. Replace the DC controller PCB.
Repetitive defects troubleshooting Defects on printer rollers can cause image defects to appear at regular intervals on the page. Use the repetitive defects ruler, see Figure 7-4. Repetitive defects ruler following the table on the next page, to measure the distance between defects that recur on a page. Use Table 7-39. Repetitive defect cause table, below, to determine which roller is causing the defect. To resolve the problem, try cleaning the roller first.
NOTE A problem that appears only at the leading edge of image with no repetition. Figure 7-4. Repetitive defects ruler NOTE Repetitive defects for the transfer unit normally will appear every other page since the transfer belt is longer that a page. However, the distance of the repetitive can vary depending on the type of paper fed. It is possible to see a repetitive defect more than once on the same page.
Interface troubleshooting This section contains information about printer communication troubleshooting. Communications checks NOTE Communication problems are normally the customer’s responsibility. Time spent attempting to resolve these problems might not be covered by the product’s Hewlett-Packard warranty. Refer the customer to the network administrator for assistance in troubleshooting network problems. If the printer is not connected to an MS-DOS-based host, proceed to Table 7-40.
CAUTION HP LaserJet printers are not designed to work with mechanical switch-box products without proper surge protection. These devices generate high transient voltages that cause permanent damage to the formatter PCB. This circumstance is not covered by the HewlettPackard warranty. Figure 7-5. Configuration page AUTOEXEC.BAT standard configurations This section contains information about programming the printer. Parallel DOS commands Ensure that the AUTOEXEC.
@PJL [Enter] LANGUAGE = {PCL/PostScript} [] UEL (universal exit language) This command (also referred to as the universal exit language command) terminates the current printer language and returns control to PJL. It performs the following actions: ● Prints all data received before this command. ● Performs a reset: E in PCL, D in PostScript. ● Turns control over to PJL. This command is also a valid HP-GL/2 terminator.
@PJL JOB This command informs the printer of the start of a PJL job and synchronizes the job status information. The printer counts print jobs, including nested jobs, incrementing the job counter for the @PJL JOB command and decrementing it for @PJL EOJ. The printer accepts the NAME= parameter and returns the name string in the unsolicited JOB start status message (if unsolicited job status is enabled).
Control panel troubleshooting When you press order: to enter the menus, the high-level menus are displayed in the following ● INFORMATION ● PAPER HANDLING ● CONFIGURE DEVICE ● DIAGNOSTICS ● SERVICE A menu map shows how individual items are configured within each of these menus. shows a sample of one page of the menu map. The menu map prints on three pages. Printing a menu map 1. Press Menu to enter the MENUS. Figure 7-6. 2. Press to highlight INFORMATION. 3. Press to select INFORMATION.
Table 7-41. Information menu Menu item Description PRINT MENU MAP Prints the control panel menu map, which shows the layout and current settings of the control panel menu items. PRINT CONFIGURATION Prints the printer configuration page. PRINT SUPPLIES AND STATUS PAGE Prints the estimated remaining life for the supplies; reports statistics on total number of pages and jobs processed, print cartridge manufacture date, serial number, page counts, and maintenance information.
Table 7-42. Paper handling menu (continued) Menu item Value Description TRAY 1 TYPE A list of available types appears. Allows you to configure the media type for Tray 1. The default value is ANY SIZE. See Supported media weights and sizes for a complete list of available types. TRAY 2 SIZE A list of available sizes appears. Allows you to configure the paper size for Tray 2 or Tray 3. The default size is Letter or A4 depending on the country/region.
Table 7-43. Printing menu (continued) Menu item Values Description DUPLEX OFF HP 3700dn and 3700dtn only ON Allows you to enable or disable the duplex function (automatic 2-sided printing). The default is OFF. You can override this setting in the printer driver. LONG EDGE Allows you to choose whether a duplex job will be flipped on the long edge or the short edge.
Table 7-43. Printing menu (continued) Menu item Values Description PCL FORM LENGTH Allows you to configure settings for the printer control language. ORIENTATION FONT SOURCE FONT NUMBER FONT PITCH SYMBOL SET APPEND CR TO LF SUPPRESS BLANKPAGES FORM LENGTH sets the number of lines per page. The default is 0. ORIENTATION determines long-edge versus shortedge page layout. The default is PORTRAIT (HP Color LaserJet 3700 series printer only).
Table 7-44. Print quality menu Menu item Values Description ADJUST COLOR CYAN DENSITY Allows you to modify the halftone settings for each color. The default for each color is 0. MAGENTA DENSITY YELLOW DENSITY BLACK DENSITY RESTORE COLOR VALUES SET REGISTRATION PRINT TEST PAGE SOURCE ADJUST TRAY 1 ADJUST TRAY 2 ADJUST TRAY 3 Allows 1-sided and 2-sided image alignment. The default for SOURCE is TRAY 2. The default for the sub-items ADJUST TRAY 1, ADJUST TRAY 2, and ADJUST TRAY 3 is 0.
Table 7-44. Print quality menu (continued) Menu item Values Description OPTIMIZE T1 UP Allows you to optimize certain parameters for all jobs rather than (or in addition to) optimizing by paper type. The default for each item is OFF. RESTORE OPTIMIZE resets all of the values to OFF.
Table 7-44. Print quality menu (continued) Menu item Values OPTIMIZEcontinued Description FILM OFFSET - Use when fuser electrostatic offset occurs (like fuser hot offset but is caused by an electrostatic charge on the fuser film). GHOST PREVENTION - Use when positive ghost appears. PRE-ROTATION - Use when a repetitive horizontal line occurs every 77 mm due to a print cartridge drum stoppage; or, use to reduce non-uniform color areas in overhead transparencies.
Table 7-45. System setup submenu Menu item Values Description SHOW ADDRESS AUTO AUTO allows the printer's IP address to be shown on the printer control panel, alternating with the Ready message. The default is OFF. OFF This menu item is displayed only if the printer is connected to a network (available for the HP Color LaserJet 3700n, 3700dn, and 3700dtn printer models).
Table 7-45. System setup submenu (continued) Menu item Values Description TRAY BEHAVIOR USE REQUESTED TRAY Allows you to specify settings for the tray selection behavior. (This setting allows you to configure the trays to behave like trays in some previous HP printers.) MANUALLY FEED PROMPT PS DEFER MEDIA The default for USE REQUESTED TRAY is EXCLUSIVELY. The default for MANUALLY FEED PROMPT is ALWAYS. PS DEFER MEDIA affects how paper is handled when printing from an Adobe PS print driver.
Table 7-45. System setup submenu (continued) Menu item Values Description CLEARABLE WARNINGS ON Allows you to set the amount of time that a clearable warning is displayed on the printer control panel. The default is JOB, which is displayed until is pressed. ON is displayed until the end of the job that generated the warning. JOB AUTO CONTINUE ON OFF Determines printer behavior when the system generates an Auto Continuable error. The default is ON.
Table 7-45. System setup submenu (continued) Menu item Values Description RAM DISK AUTO Determines how the RAM disk feature is configured. AUTO allows the printer to determine the optimal RAM disk size based on the amount of available memory. OFF disables the RAM disk, but a minimal RAM disk is still available. The default is AUTO. OFF HP Color LaserJet 3700 series printer only. LANGUAGE A list of available languages appears. Sets the default control panel language.
Table 7-46. I/O submenu (continued) Menu item Values Description EIO 1 Possible values are: HP 3700 only TCP/IP IPX/SPX APPLETALK Allows you to configure EIO devices installed in the EIO slot. See Enhanced I/O (EIO) configuration (HP color LaserJet 3700 series printer only), in chapter 3 for more information.
Table 7-48. Diagnostics menu (continued) Menu item Description SHOW EVENT LOG Displays the last 50 events on the control panel display, starting with the most recent. PQ TROUBLESHOOTING Prints a series of print quality assessment pages that help troubleshoot any print quality problems. DISABLE CARTRIDGE CHECK Allows you to print with one or more print cartridges removed to help troubleshoot many print problems. PAPER PATH SENSORS Shows the values of the sensors.
Table 7-49. Service menu (continued) Menu item Values Description TOTAL COLOR PAGES Range: 0 9999999 Allows you to reset the page count after replacing the formatter. The page count should reflect the number of pages printed on the print engine rather than the formatter. REFURBISH PAGE COUNT Range: 0 9999999 Allows the page count to be reset to the original refurbished page count when the printer is repaired.
Tools for troubleshooting This section contains information about the Printer's embedded Web server. Embedded Web server (HP Color LaserJet 3700 series printer only) Using the embedded Web server (HP Color LaserJet 3700 series printer only) When the printer is directly connected to a computer, use the HP Toolbox to view web pages for the printer status. When the printer is connected to the network, the embedded Web server is automatically available.
Information tab The Information pages group consists of the following pages. ● Device Status. This page displays the printer status and shows the life remaining of HP supplies, with 0 percent indicating that a supply is empty. The page also shows the type and size of print paper set for each tray. To change the default settings, click Change Settings. ● Configuration page.This page shows the information found on the printer Configuration page. ● Supplies Status.
Networking tab This tab allows the network administrator to control network-related settings for the printer when it is connected to an IP-based network. This tab will not appear if the printer is directly connected to a computer, or if the printer is connected to a network using anything other than an HP Jetdirect print server card. Other links This section contains links that connect you to the Internet. You must have Internet access in order to use any of these links.
For Windows ● Microsoft Internet Explorer 5.2 or later ● Netscape Navigator 6 or later ● Opera Software ASA Opera™ For Macintosh ● Microsoft Internet Explorer 5.2 or later ● Netscape Navigator 6 or later ● All pages can be printed from the browser. To view HP Toolbox On the Start menu, select Programs, and then HP toolbox. Double-click the Status Client icon. The HP toolbox opens in a Web browser.
Alerts tab ● The Alerts tab allows you to configure the printer to automatically notify you of printer alerts.
Advanced Printer Settings window When you click the Advanced Printer Settings link, a new window opens.
Printer configuration page Use the configuration page to view current printer settings, to help troubleshoot printer problems, or to verify installation of optional accessories, such as memory (DIMMs), paper trays, and printer languages. 1. Press to enter the MENUS. 2. Press to highlight INFORMATION. 3. Press to select INFORMATION. 4. Press to highlightPRINT CONFIGURATION PAGE. 5. Press to selectPRINT CONFIGURATION PAGE. The message PRINTING...
Figure 7-8. EIO page 1 2 3 4 5 6 7 8 HP JetDirect configuration Security settings Network statistics TCP/IP settings IPX/SPX settings Novell/Netware settings AppleTalk settings DLC/LLC settings Supplies status page The supplies status page illustrates the remaining life for the following printer supplies: ● Print cartridges (all colors) ● Transfer unit ● Fuser To print the supplies status page: 1. Press to enter the MENUS. 2. Press to highlight INFORMATION. 3. Press to select INFORMATION. 4.
NOTE If you are using non-HP supplies, the supplies status page will not show the remaining life for those supplies. Figure 7-9. Supplies status page 1 2 3 4 5 6 Black print cartridge information Cyan print cartridge information Magenta print cartridge information Yellow print cartridge information Transfer unit kit information Image fuser kit information Usage page (HP 3700 only) The usage page lists a page count for each size of media that has passed through the printer.
The message PRINTING... USAGE appears on the display until the printer finishes printing the usage page. The printer returns to the Ready state after printing the usage page. Figure 7-10. Usage page 1 2 3 Printer identification information Usage totals Percent of coverage broken down by color Event log The event log lists the printer events, including printer jams, service errors, and other printer conditions. ENWW 1. Press to enter the MENUS. 2. Press to highlight DIAGNOSTICS. 3.
The message PRINTING... EVENT LOG appears on the display until the printer finishes printing the event log. The printer returns to the Ready state after printing the event log. Figure 7-11.
Diagnostics Additional diagnostic information is provided in this section. Diagnostics flowchart Use this flowchart to help identify the cause of high-level printer problems. These problems are indicated by abnormalities in the printer’s power-on sequence. The LED that the flowchart refers to is on the formatter. Figure 7-13. Formatter LED on the next page indicates where this LED is located. This is a "heartbeat" LED that blinks on and off when the formatter is operating properly. Figure 7-12.
Figure 7-13. Formatter LED Engine diagnostics This section provides an overview of the engine diagnostics incorporated into the HP Color LaserJet 3500/3550 and 3700 series printer. The printer contains extensive internal diagnostics that help in troubleshooting print quality issues, paper path issues, noise issues, component issues, and timing issues. Diagnostics mode Some of the diagnostic tests automatically put the printer into a special diagnostics mode.
When the printer is in the special diagnostics mode, the four tests listed above appear in the menu and are available to be run. To access other diagnostic tests or to leave the special state, press the STOP button, and then select Exit diagnostics. The printer will reset itself, and then return to the normal state. NOTE A good understanding of how the printer operates is required to use the engine diagnostics successfully.
Diagnostics from the Control Panel This section provides information about performing the printer diagnostics. Printer display menu Control Panel Fuel Gauges used to determine if cyan, magenta, yellow, or the black print cartridge is in a low or out condition. Diagnostics test menu Print Event Log This item prints an event log that displays the last 50 entries in the printer’s event log, starting with the most recent.
NOTE The reversed paper sensor (PS9) and duplexing feed delivery paper sensor (PS10) are for the HP Color LaserJet 3700 series printer only Figure 7-14.
Table 7-50.
O: only toggle this switch by opening and closing the front door. Do not toggle this switch with the door open using a screw driver. You can damage the gears on the right side and the print cartridges when closing the front door after the switch has been defeated. If the front door switch is toggled with the front door open, you will not be able to close the front door. If this happens, to close the door you must perform the following steps: 1. Remove the right cover. See Right cover removal, in chapter 6.
Menus cannot be accessed during component tests, so the button serves the same function as the STOP button. There are 18 component tests. Figure 7-15.
Figure 7-16. Location of solenoids and clutches SL1 SL2 SL4 SL5 CL1 CL2 CL3 Tray 1 pick-up solenoid Tray 2 pick-up solenoid (pick-up/feed assembly) Secondary transfer roller engaging solenoid Duplex feed solenoid Registration clutch K development clutch (image drive unit) Developing engaging clutch (developing engaging drive unit) The following 18 tests are available in the component test menu: 1.
8. ALIENATION MOTOR Drives the delivery motor (M2) and the developing engaging clutch (CL3) which rotates the rear output paper path rollers and engages/disengages the CMYK print cartridge developer rollers. This test does not rotate the print cartridge developer rollers. 9. TRANSFER 1 MOTOR Drives the primary transfer roller engaging motor (M5) which engages/disengages the CMYK ITB primary charging rollers. 10.
After the print job completes, press STOP to return to the diagnostic menu before the timer times out. After the timer times out, press STOP. You will have to cycle the door switch by opening and closing the front door to restart the engine and return it to a normal state. When the timer trips, the display shows the message PRINTING STOPPED, PRESS Check TO CONTINUE. Pressing will print the previously selected job. If you do not want the previous job to print, press STOP first, and then press the button.
Set Registration Allows 1 sided and 2 sided image alignment. Create Cleaning Page used to generate a cleaning page to clean spots off the fuser rollers. Process Cleaning Page used to feed a cleaning page to clean spots off the fuser rollers.
Test pages Printing test pages helps you determine whether the printer engine and the formatter are functioning. Engine test page To verify that the printer engine is functioning, print an engine test page. Use a small pointed object to depress the test page switch located on the left side of the printer, as shown in . The test page should have a series of horizontal lines. The test page can use only Tray 2 as the paper source, so ensure paper is loaded in Tray 2. Figure 7-17.
Engine resets This section provides information about the printer's cold reset and the NVRAM initialization. Cold reset A cold reset unlocks menus that have been locked and resets variables in the control panel. However, it does not clear the values in the Service menu (such as the serial number and page counts). To perform a cold reset 1. Turn the printer on. 2. As the printer performs its power-on sequence, press and hold the control panel are lit. 3.
Calibration bypass During certain diagnostic procedures, you will need to bypass the automatic calibration that is performed whenever the printer is turned on. To bypass calibration 1. Turn the printer on and watch the control panel display. 2. When the display begins showing the memory count, press and hold lights on the control panel are lit. 3. Press until all three . 4. Press Menu. The display should show SKIP DISK LOAD. 5. Press until SKIP CALIBRATION is highlighted. 6. Press .
Service menu This section provides information about accessing the service menu and its operation. Accessing the Service menu The Service menu is PIN protected for added security. Only authorized service people have access to the Service menu. When you select SERVICE from the list of menus, you are prompted to enter your 8-digit PIN number. The PIN for the HP Color LaserJet 3500/3550 series printer is 10350003 and for the HP Color LaserJet 3700 series printer is 10370003. 1. Press or 2.
Service ID This item allows the date that the printer was first used to be shown through the control panel, eliminating the need for customers to keep paper receipts for proof of warranty. Because the printer does not have an internal clock, the service ID date’s availability is dependent on the printer being connected to a source that can provide the date, such as the installer, the driver, or the embedded Web server.
Diagrams This section contains printer diagrams for locating parts for troublshooting.
Main parts Bk C M Y Figure 7-18.
Switches Figure 7-19.
Sensors Figure 7-20.
Solenoids and clutches Figure 7-21.
Motors and fans Figure 7-22.
PCBs Figure 7-23.
J1022 J1019 J1012 J1016 J1010 J1014 J1015 J1025 J1005 J1013 J1026 J1008 J1009 J1027 J1011 J1006 J1024 J1023 J1003 CP1015 J1001 J1028 SW1001 Figure 7-24. J1002 J1004 J1028 J1031 Location of DC controller PCB connectors (HP 3700) J1022 J1019 J1012 J1016 J1010 J1014 J1015 J1025 J1005 J1008 J1003 J1026 J1009 J1027 J1011 J1006 J1024 J1023 CP1015 J1001 SW1001 Figure 7-25.
Connector locations J5020 J1005 J1022 J5001B J1013 J5001A J1012 J5007 J5004 J5024 J709 J5025 J5017 J5011 J5008 J5027 J1015 J505B J505A J101B J1027 J101A J1001 J1006 J1011 J1003 J1026 J1004 J5009 J5010 J5028 J9002 J716 J2001 J701 J9006 J702 J704 J3501 J3503 J3502 Figure 7-26.
J714 J5002 J201 J1014 J1019 J5014 J1010 J1024 J1009 J5003 J1025 J5005 J5029 J710 J706 J708 J1015 J1023 J1008 J1002 J1031 J901 J711 J707 J5013 J5026 J601 J3002 Figure 7-27.
J5020 J5004 J1005 J5001B J1022 J5001A J5007 J1012 J5024 J5017 J5008 J5027 J1015 J505B J505A J101B J1027 J101A J1001 J1006 J1011 J1003 J1026 J1004 J5009 J5010 J5028 J9002 J716 J2001 J701 J9006 J702 J704 J3501 J3503 J3502 Figure 7-28.
J714 J5002 J201 J1014 J1019 J5014 J1010 J1024 J1009 J5003 J1025 J5005 J5029 J706 J708 J1015 J1023 J1008 J1002 J1031 J901 J711 J707 J5013 J5026 J601 J3002 Figure 7-29.
500-sheet paper feeder connectors J5012LA J5012LB J4001 J4004 J4003 J4002 Figure 7-30.
General circuit diagram The circuit diagram for the printer is provided in the following two figures. In addition, the 500sheet feeder is also provided following the general circuit diagrams. Figure 7-31.
Figure 7-32.
8 Parts and diagrams Chapter contents This chapter contains the following sections. Chapter contents ...................................................................................................................465 Introduction ............................................................................................................................466 Ordering parts .......................................................................................................................
Introduction The figures in this chapter show the major subassemblies in the printer and their component parts. A table (materials list) follows each exploded assembly diagram. Each table lists the reference designator (item number), the associated part number, and the description of each part. NOTE When looking for a part number, pay careful attention to the voltage listed in the description column to ensure that the part number selected is for the correct printer model.
Ordering parts All standard part numbers are stocked and can be ordered from Hewlett-Packard Customer Support-Americas (HPCS-A) or Hewlett-Packard Customer Support-Europe (HPCS-E). For information about contacting HPCS-A or HPCS-E, see Parts and supplies, in chapter 2. NOTE Parts that have no reference designator or part number are not field replaceable and cannot be ordered. Supplies and accessories The items listed in Table 8-1.
Table 8-1. Supplies and accessories (continued) Part Product number Part number Description Accessories Q2486A Q2486-67901 Optional 500-sheet paper feeder (Tray 3) Internal (EIO) connectivity for the HP Color LaserJet 3700 series printer Internal (EIO) I/O PCB J6057A J6057-69001 HP Jetdirect 615n internal print server (10/100-TX, Ethernet, HISpeed USB 2.
Table 8-1. Supplies and accessories (continued) Part Supplies for the HP Color LaserJet 3500/3550 series printer Supplies for the 3700 series printer Cables Product number Description J6035B HP Jetdirect 175x print server (fast Ethernet 10/100base Tx, USB 1.
Table 8-1. Supplies and accessories (continued) Part Product number Part number C6520A Power cord Paper Reference materials Ferrite Cores Panel overlays 470 Chapter 8 Parts and diagrams Description USB 2.
Table 8-1.
Table 8-1.
Table 8-2. Common fasteners (continued) Illustration Description Size Part number Use SCREW, TP XB4-7300-805CN Secures sensor PCB to plastic (environmental, toner full, color misregistration, and media). SCREW,TAPPING M4X10 ,TRUSS HEAD XB4-7401-005CN Secures anything to plastic. SCREW, STEPPED M4X4.5 RC1-1624000CN Secures the right side of the pick-up/feed assembly to the frame.
Formatter and DC Controller replaced at the same time Do not replace both the formatter and the DC Controller at the same time. Replace one at a time. If the formatter and DC Controller are replaced at the same time in an HP Color LaserJet 3700 series printerthat has the ability to perform duplex printing, this functionality will be lost. To determine if the printer can duplex, print a configuration page from the Information menu and reference Paper Trays and Options.
In addition, the Total Mono Pages, Total Color Pages, Serial Number, Service ID, Cold Reset Paper (if needed), and the Fuser Kit Count will need to be reset using the service menu. The Transfer Kit count will be unaffected by the replacement of a formatter. To ensure optimum print quality, the printer will need to be calibrated by performing 3 Calibrate Now's using the printer control panel by selecting Configure Device / PRINT QUALITY / CALIBRATE NOW.
The Transfer Kit count is set when it is first placed in a printer by a back up value contained on the formatter. If using a DC Controller that was previously installed in another printer, the Transfer Kit count will be set to the count of the first printer the DC Controller was installed in. The Transfer Kit count cannot be reset in the Service Menu. The Transfer Kit count can be reset to zero by setting Configure Device / RESETS / RESET SUPPLIES/ NEW TRANSFER KIT = YES.
If you replace the fuser for any reason before the control panel reads REPLACE FUSER KIT, for instance if the fuser is defective, you will need to reset the fuser count manually through the control panel. The Fuser Kit count can be reset to zero by setting Configure Device / RESETS / RESET SUPPLIES / NEW FUSER KIT = YES. Transfer unit (ITB assembly) replacement configuration Under normal circumstances, the printer will prompt you to order a new transfer unit when the control panel reads ORDER TRANSFER KIT.
Illustrations and parts lists The following illustrations and parts tables list the field replaceable units (FRUs) for this printer. At the end of this chapter are two tables listing all of the parts shown in this chapter. Alphabetical parts list lists the parts in alphabetical order, and Numerical parts list lists the parts in numerical order by part number. Both tables list the appropriate figure in this chapter where the part can be found. Figure 8-1.
Figure 8-2.
Figure 8-3. Main parts (3 of 3) 500-sheet paper feeder Figure 8-4.
Table 8-3.
Figure 8-5.
Table 8-4.
Figure 8-6.
Table 8-5.
Figure 8-7.
Table 8-6.
Figure 8-8.
Table 8-7.
Figure 8-9.
Table 8-8.
Table 8-8.
ENWW Illustrations and parts lists 493
Figure 8-10.
Table 8-9. Internal components (3 of 4) ENWW Ref Description Part number Qty 1 GUIDE, ROD, LEFT RC1-1156-000CN 1 2 SENSOR UNIT, HUMIDITY WP2-5156-000CN 1 3 SPRING, GROUNDING RC1-1177-000CN 1 4 DEV.
Figure 8-11.
Table 8-10.
Figure 8-12.
Table 8-11.
Figure 8-13.
Table 8-12.
Table 8-12.
ENWW Illustrations and parts lists 503
Figure 8-14.
Table 8-13.
Figure 8-15.
ENWW Illustrations and parts lists 507
Figure 8-16.
ENWW Ref Description Part number Qty 1 CLUTCH, MECHANICAL RB2-6324-000CNN 1 2 HOLDER, SENSOR RC1-1496-000CN 1 3 LEVER, SENSOR RC1-1514-000CN 1 4 GUIDE, CABLE RC1-2322-000CN 1 5 GUIDE, CABLE RC1-2323-000CN 1 6 GUIDE, CASSETTE, LEFT RC1-1491-000CN 1 7 MOUNT, SOLENOID (HP3700) RL1-0203-000CN 1 7 MOUNT, SOLENOID (HP3500/3550) RC1-1511-000CN 1 8 DUPLEX GUIDE ASS'Y (HP3700) RM1-0458-000CN 1 9 FOOT ASS'Y RM1-0459-000CN 2 10 PAPER FEED ASS'Y RM1-0460-000CN 1 11 DUPL
Figure 8-17.
Table 8-14.
Figure 8-18.
Table 8-15.
Figure 8-19.
Table 8-16.
Figure 8-20.
ENWW Illustrations and parts lists 517
Figure 8-21.
Table 8-17. Pick-up/Feed assembly Ref ENWW Description Part number Qty PICK-UP/FEED ASS'Y (HP3700) RM1-0449-000CN 1 PICK-UP/FEED ASS'Y (HP3500/3550) RM1-0760-000CN 1 1 SEPARATION PAD ASS'Y RM1-0739-000CN 1 2 SOLENOID RK2-0145-000CN 1 3 TRANSFER ROLLER ASS'Y RM1-0740-000CN 1 4 CLUTCH, MECHANICAL RC1-1433-000CN 1 5 LEVER, SENSOR RC1-1456-000CN 1 6 SPRING, TORSION RC1-1464-000CN 1 7 PAD, SEPARATION RC1-0939-000 1 8 ROLLER, PICK-UP RC1-1535-000CN 1 9 COLOR MIS-REG.
Figure 8-22.
Table 8-18.
Figure 8-23.
Table 8-19.
Figure 8-24.
Table 8-20.
Figure 8-25.
Table 8-21.
Figure 8-26.
Table 8-22.
Figure 8-27.
Table 8-23.
Figure 8-28.
Table 8-24.
Figure 8-29.
Table 8-25.
Figure 8-30.
Table 8-26.
Alphabetical parts list Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Table 8-27.
Numerical parts list Table 8-28.
Table 8-28.
Table 8-28.
Table 8-28.
Table 8-28.
Table 8-28. Numerical parts list (continued) 556 Part number Description Table and page RC1-2330-000CN PAD, CUSHION Table 8-13 on page 505 RC1-2334-000CN GUIDE, CABLE Table 8-8 on page 491 RC1-2339-000CN STOPPER, ARM, RIGHT Table 8-12 on page 501 RC1-2364-000CN COVER, FMTR CABLE (HP3500/3550) Table 8-10 on page 497 RC1-2422-000CN LABEL, HIGH TEMP.
Table 8-28. Numerical parts list (continued) ENWW Part number Description Table and page RL1-0193-000CN PLATE, PAPER FEEDER DRIVE Table 8-8 on page 491 RL1-0203-000CN MOUNT, SOLENOID (HP3700) Table 8-13 on page 509 RL1-0215-000CN STOPPER, FRONT HINGE, LEFT Table 8-7 on page 489 RL1-0216-000CN STOPPER, HINGE, RIGHT Table 8-7 on page 489 RL1-0217-000CN SUPPORT, PICK-UP GEAR Table 8-8 on page 492 RM1-0415-040CN IMAGE DRIVE ASSEMBLY Table 8-14 on page 511 RM1-0419-000CN DEV.
Table 8-28.
Table 8-28.
Table 8-28.
Index Symbols/Numerics 500-sheet feeder paper jams 361 500-sheet paper feeder - see also, tray 3 296 A access denied 76 accessories cleaning 91 ordering 43 adjusting color balance 389 ammonia-based cleaners, avoiding 92 AppleTalk networks 70 ASCII escape sequence 77 assemblies locating 9 remanufactured 44 replacing 42 atmospheric pressure 13 AUTOEXEC.
commands DOS 404 PJL 404 Commercial Service and Support Organization America (CSSO-A) 43 Europe (CSSO-E) 43 compact disc, service parts information 44 components replacing 42 configuration color misregistration sensor (PS12) replacement 355, 476 DC controller PCB replacement 353, 354, 475 DC controller, previously installed, replacement 353, 474 enhanced I/O (EIO) 69 formatter PCB and DC controller PCB replacement at same time 352, 474 formatter PCB replacement 352, 474 fuser replacement 355, 476 laser/scan
developing disengaging assembly, part numbers 506, 508 developing engaging drive assembly removal and replacement 225 developing engaging drive clutch (CL3) removal and replacement 268 developing engaging sensor (PS14) removal and replacement 261 developing motor (M4) removal and replacement 273 developing motor control 125 developing motor control circuit 125 developing section cartridges 156 engaging/disengaging unit 157 memory tag control 160 development block, print process 151 diagnostics control panel
font DIMMs installing 79 formatter PCB removal and replacement 279 replacement configuration 352, 474 replacement configuration, previously installed 353, 474 front cover, 500-sheet paper feeder removal and replacement 296 front door removal and replacement 209 fuel gages 436 functions block 121 failure detection 130 flicker prevention 129 fuser detection 130 motors 121 protective 129, 132 fuser count, resetting 448 covers 91 life 207 removal and replacement 220 replacing 103 warranty 21 fuser block, print
ITB (transfer) unit 164 (transfer) unit, secondary 164 replacing 99 replacing before end of life 103 see, transfer unit 218 J jam - see, paper jams 357 K Korean EMI statement 37 L language changing on display 63 control panel overlay 63 overlays 63 printer job (PJL) 404 language font DIMM enabling 83 laser control 140 laser emission control 142 laser safety statements United States 37 laser/scanner system 139 unit 139 laser/scanner assembly removal and replacement 222 replacement configuration 355, 476 le
modes duplex feed 194 motor delivery (M2) 271 developing (M4) 273 drum (M3) 271 exhaust fan (FAN1 277 feed (M1) 269 functions 121 locations 455 transfer roller engaging (M5) 274 MS-DOS commands 404 MSDS (Material Safety Data Sheet) 32 multifeeds 360 multipart forms, avoiding 24 multipurpose tray - see, tray 1 216 N network configuration 68 troubleshooting 403 networking tab, embedded Web server 424 networks AppleTalk 70 enhanced I/O (EIO) 69 enhanced I/O (EIO) configuration 69 enhanced I/O interfaces 69 HP
parts ordering internet 43 passwords setting 76 PCB control panel 287 DC controller 278 formatter 279 high-voltage power supply 281 low-voltage power supply 285 memory controller 286 replacement configuration requirements 352, 473 PCB, 500-sheet paper feeder removal and replacement 300 PCBs locating 456 perforations 24 phase control 145 phone numbers Commercial Service and Support Organizations 43 pick-up clutch, 500-sheet paper feeder removal and replacement 301 pick-up drive unit, 500-sheet paper feeder r
printer components removal and replacement 201 printer covers removal and replacement 209 printer drivers additional 72 ordering 45 software 71 printer features 6 Printer Job Language (PJL) commands 404 Technical Reference Manual 77 printing four colors 385 grayscale 386 menu map 407 process, print 147 production number 22 protective functions 129, 132 PS1 - see, tray 1 paper sensor 253 PS10 - see, duplex feed delivery paper sensor 258 PS11 - see, rear output bin paper sensor 259 PS12 - see, color misregist
swing guide, left 245 swing guide, right 242 test print switch 251 thermistor, main 239 thermistor, sub 239 thermoswitch 239 transfer roller engaging motor (M5) 274 transfer unit 218 tray 1 216 tray 1 paper sensor (PS1) 251, 253 tray 1 pick-up roller 237 tray 1 pick-up solenoid 263 tray 1 separation pad 237 Tray 2 291 tray 2 end plate 291 tray 2 guide, right (HP 3700) 291, 294 tray 2 paper sensor (PS2) 253 tray 2 pick-up roller 238 tray 2 pick-up solenoid 264 tray 2 separation pad 238 upper rear door 214 wa
printer drivers 71 UNIX 73 utilities 73 solenoid duplex feed (SL5) 266 locations 454 secondary transfer roller engaging solenoid (SL4) 265 special media, printing 26 specifications electrical 12 environmental 13 media 16 preprinted paper 25 print media 16 printer 15 site requirements 11 space requirements 11 speed control 145 spilled toner cleaning 92 standby mode power consumption 12 status messages 312 storing printer 13 supplies 13 subassemblies 42 supplies locating 96 managing 94 ordering 43, 467 part n
tray 1 paper sensor removal and replacement 253 tray 1 pick-up roller removal and replacement 237 tray 1 pick-up solenoid removal and replacement 263 tray 1 separation pad removal and replacement 237 tray 2 end plate, removal and replacement 291 loading paper 59 removal and replacement 291 tray 2 guide, right (HP 3500) removal and replacement 294 tray 2 guide, right (HP 3700) removal and replacement 291 tray 2 paper sensor removal and replacement 253 tray 2 pick-up roller removal and replacement 238 tray 2
voltage power consumption 12 W warranty extended 46 fuser 21 print cartridge 20 statement 19 transfer unit 21 waste toner full detection 167 waste toner level sensor (PS13) removal and replacement 260 Websites printer specifications 13 websites Material Safety Data Sheet (MSDS) 32 printer specifications 15 product and support information 44 service part information 44 572 Index weight media 16, 29 Windows networks 65 70 wrinkled paper 367 ENWW
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