Manual Part No. C4110-91033 Printed on at least 50%Total Recycled Fiber with at least 10% Post-Consumer Paper *C4110-91033* *C4110-91033* C4110-91033 HP LaserJet 5000, 5000 N and 5000 GN Printers Service Manual Copyright© 1998 Hewlett-Packard Co.
HP LaserJet 5000, 5000 N, and 5000 GN Printers Service Manual _____________
© Copyright Hewlett-Packard Company 1998 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Publication number C4110-91033 First Edition Warranty Trademark Credits The information contained in this document is subject to change without notice. PostScript™ is a trademark of Adobe Systems Incorporated which may be registered in certain jurisdictions.
Contents 1 Printer Description Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Printer Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Model and Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Site Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Printer Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Control Panel Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Control Panel Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Control Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Settings and Defaults . . . . . . . . . . .
5 Functional Information Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Printer Subsystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Power Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 AC/DC Power Distribution. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Overcurrent Overvoltage Protection . . . . . . . . . . . . . . . . . . . 5-5 High Voltage Power Distribution . . . . . . .
6 Removing and Replacing Parts Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 User Installable Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Removal and Replacement Strategy. . . . . . . . . . . . . . . . . . . . . . 6-7 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 Removing Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10 Rear Door / Rear Output Bin. . .
Optional 500-sheet Tray Disassembly . . . . . . . . . . . . . . . . . . . 6-74 Tray Indicator Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-76 Left Front Corner Cover Installation . . . . . . . . . . . . . . . . . . 6-77 Paper Size Spring Assembly . . . . . . . . . . . . . . . . . . . . . . . 6-78 D-roller and Feed Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-79 Gear Assembly and PCA . . . . . . . . . . . . . . . . . . . . . . . . . . 6-81 Power Connector . . . . . . . .
6 Contents EN
1 Printer Description Overview This chapter discusses the following: EN ● Printer Features ● Identification ● Site Requirements ● Paper Specifications ● Safety Information Overview 1-1
Printer Features Table 1-1. Printer Features Speed 17 pages per minute (ppm), A4 paper or 16 ppm, letter paper 100 MHz RISC microprocessor First Page Out = 13 sec.
Table 1-1. Printer Features (continued) Paper Trays 100-sheet Tray 1 Size: 3 by 5 in (76 by127 mm) to 12.28 by 18.5 in (312 by 470 mm) Optional 250-sheet Tray 2 supports Size: 5.8 by 8.2 in (149 by 210 mm) to 11 by 17 in (279 by 432) Optional Universal 500-sheet Tray supports standard and custom sizes from 5.8 by 8.
Table 1-2. Comparison of HP LaserJet 5000 Series Printers HP LaserJet 5000 HP LaserJet 5000 N HP LaserJet 5000 GN optional standard standard 4 4 4 Standard RAM 4 MB internal 8 MB1 12 MB1 250-sheet Tray 1 standard 1 optional 1 standard 1 optional 1 standard 1 optional 500-sheet Universal Tray optional standard standard 1.
Identification Model and Serial Numbers The model number and serial numbers are listed on identification labels located on the rear left side of the printer. The serial number is alphanumeric, such as USB0000146 for the HP LaserJet 5000 N printer. The serial number contains information about the Country of Origin, the Revision Level, the Production Code, and Production Number of the printer. The rear labels also contain power rating and regulatory information as shown in Figure 1-1.
Site Requirements The following environmental specifications must be maintained to ensure the proper operation of the printer. Consider the following points before installing the printer: ● Install in a well-ventilated, dust-free area. ● Install on a hard, flat and continuous surface, with all four printer feet level. Do not install on carpet or other soft surfaces. ● Ensure adequate power is supplied. Printer power requirements are listed in Table 1-3.
Space Requirements 55 in (139.8 cm) 24.6 in (62.5 cm) 11.9 in (30.3 cm) 18.7 in (47.5 cm) 18.5 in (47.0 cm) 18.6 in (47.3 cm) 10.6 in (27.0 cm) 18.5 in (47.0 cm) Figure 1-2 EN 4.3 in (11.
55 in (139.8 cm) 24.6 in (62.5 cm) 11.9 in (30.3 cm) 18.5 in (47.0 cm) 10.6 in (27.0 cm) 24.4 in (62.0 cm) 6.1 in (15.
55 in (139.8 cm) 24.6 in (62.5 cm) 11.9 in (30.3 cm) 18.5 in (47.0 cm) 6.5 in (16.6 cm) 10.6 in (27.0 cm) 29.7 in (75.
Environmental Requirements Table 1-4. Printer and Toner Cartridge Environmental Conditions Item Operating Storage Temperature 50-91° F (10-32° C) -4 to 140°F (-20 to 60°C) Relative Humidity 20-80% RH (with no condensation) 10% TO 95% RH Table 1-5. Acoustic Emissions (Per ISO 9296) Printer State Sound Power Printing, 16 pages per minute (ppm) Lwad= 6.6 bels (A) Printing, 8 ppm Lwad= 6.3 bels (A) PowerSave Lwad= 4.
Paper Specifications The following tables show paper specifications for the printer. Table 1-6. Paper Specifications, Tray 1 Supported Paper Dimensions1 Minimum Size (custom) 3 by 5 in (76 by 127 mm) Maximum Size (custom) 12.28 by 18.5 in (312 by 470 mm) Transparencies Labels Envelopes Same as minimum and maximum paper sizes listed above. Capacity2 Weight 16 to 53 lb (60 to 199 g/m2) 100 sheets of 20 lb (75 g m2) paper Thickness: 0.0039 in to 0.0045 in (0.099 to 0.
Table 1-7. Paper Specifications, Tray 2 or Optional 250-sheet Tray Supported Paper Dimensions1 Letter 8.5 by 11 in (216 by 279 mm) A4 8.3 by 11.7 in (210 by 297 mm) Executive 7.3 by 10.5 in (191 by 267 mm) Legal 8.5 by 14 in (216 by 356 mm) B5 (JIS) 7.2 by 10 in (182 by 257 mm) A5 5.8 by 8.2 in (148 by 210 mm) 11 x 17 11 by 17 in (279 by 432 mm) A3 11.7 by 16.5 in (297 by 420 mm) B4 (JIS) 10.1 by 14.
Table 1-8. Paper Specifications, Optional 500-sheet Tray Supported Paper Dimensions1 Letter Letter-R3 8.5 by 11 in (216 by 279 mm) A4 A4-R3 8.3 by 11.7 in (210 by 297 mm) Executive 7.3 by 10.5 in (191 by 267 mm) Legal 8.5 by 14 in (216 by 356 mm) B5 (JIS) 7.2 by 10 in (182 by 257 mm) A5 5.8 by 8.2 in (148 by 210 mm) 11 by 17 11 by 17 in (279 by 432 mm) A3 11.7 by 16.5 in (297 by 420 mm) B4 (JIS) 10.1 by 14.3 in (257 by 364 mm) Custom4 5.8 by 8.2 to 11.
Table 1-9. Paper Specifications, Optional Duplex Printing Accessory (Duplexer) Dimensions1 Minimum Maximum Weight 5.8 by 8.3 inches (148 by 210 mm) 16 to 28 lb (60 to 105 g/m2) 11.7 by 17 inches (297 by 432 mm) 1. The printer supports a wide range of media sizes. Check the printer software for supported sizes.
Guidelines for Using Paper For best results, use conventional 20 lb (75 g/m2) paper. Make sure the paper is of good quality and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges. Some paper causes print quality problems, jamming, or damage to the printer. For more specific information, see “Image Defects” on page 7-50. Table 1-10. Guidelines for Using Paper Symptom Problem with Paper Solution Poor print quality or toner adhesion. Problems with feeding.
Note Do not use letterhead paper that is printed with low-temperature inks, such as those used in some types of thermography. Do not use raised letterhead. The printer uses heat and pressure to fuse toner to the paper. Make sure that any colored paper or preprinted forms use inks that are compatible with the printer’s temperature (392° F or 200° C for 0.1 second).
Paper Weight Equivalence Table Use this table to determine approximate equivalent points in weight specifications other than U.S. bond weight. For example, to determine the equivalent of 20 lb U.S. bond weight paper in U.S. cover weight, locate the bond weight (in row 3, second column) and scan across the row to the cover weight (in the fourth column). The equivalent is 28 lb. Shaded areas indicate a standard weight for that grade. Table 1-11. Paper Weight Equivalence U.S. Post Card1 thickness (mm) U.S.
Labels CAUTION To avoid damaging the printer, use only labels recommended for use in laser printers. If you have problems printing labels, use Tray 1 and open the rear output bin. Never print on the same sheet of labels more than once. Label Construction When selecting labels, consider the quality of each component: ● Adhesives: The adhesive material should be stable at 392° F (200° C), the printer’s maximum temperature. ● Arrangement: Only use labels with no exposed backing between them.
Envelopes Envelope Construction Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. Successful printing on envelopes depends upon the quality of the envelopes. When selecting envelopes, consider the following components: ● Weight: The weight of the envelope paper should not exceed 28 lb (105 g/m2), or jamming may result. ● Construction: Prior to printing, envelopes should lie flat with less than 0.
Envelopes with Adhesive Strips or Flaps Envelopes with a peel-off adhesive strip or with more than one flap that folds over to seal must use adhesives compatible with the heat and pressure in the printer. The extra flaps and strips might cause wrinkling, creasing, or jams. Envelope Margins The following table gives typical address margins for a Commercial #10 or DL envelope. Table 1-12. Envelope Margins Type of Address Top Margin Left Margin Return Address 0.6 in (15 mm) 0.
Card Stock Construction ● Smoothness: 36-53 lb (135-199 g/m2) card stock should have a smoothness rating of 100-180 Sheffield. 16-36 lb (60-135 g/m2) card stock should have a smoothness rating of 100-250 Sheffield. ● Construction: Card stock should lie flat with less than 0.2 in (5 mm) of curl. ● Condition: Make sure card stock is not wrinkled, nicked, or otherwise damaged. ● Sizes: Use only card stock within the following size ranges: • minimum: 3 by 5 in (76 by 127 mm) • maximum: 12.28 by 18.
Safety Information 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.
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.
Laser statement for Finland Luokan 1 laserlaite Klass 1 Laser Apparat HP LaserJet 5000, 5000 N, 5000 GN -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.
Varning! Om laserprinterns skyddshölje öppnas då apparaten är i funktion, utsättas användaren för osynlig laserstrålning. Betrakta ej strålen. Tiedot laitteessa käytettävän laserdiodin säteilyominaisuuksista: Aallonpituus 775-795 nm Teho 5 mW Luokan 3B laser Material Safety Data Sheet The Toner Cartridge/Drum MSDS can be obtained by calling the U.S. HP FIRST (Fax Information Retrieval Support Technology) at (1) (800) 231-9300.
Environmental Product Stewardship Protecting the Environment Hewlett-Packard Company is committed to providing quality products in an environmentally-sound manner. The printer has been designed to minimize impacts on the environment. The printer design eliminates: Ozone Production The printer does not use high-voltage corona wires in the electrophotographic process and therefore generates no appreciable ozone gas (O3).
2 Service Approach Overview This chapter discusses the following: EN ● Service Approach ● Parts and Supplies ● Warranty Statement Overview 2-1
Service Approach Repair of the printer normally begins with use of the printer’s internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly level replacement of Field Replaceable Units (FRUs). Some mechanical assemblies may be repaired at the subassembly level. PCA component replacement is not supported by Hewlett-Packard.
Parts and Supplies Ordering Information Field replaceable and accessory part numbers are found in Chapter 8 of this manual. Replacement parts may be ordered from HP’s Support Materials Organization (SMO) or Support Materials Europe (SME). Use only accessories specifically designed for this printer. Accessories can be ordered from an authorized service or support provider. See page 2-5 and page 8-4 for more information.
Helpful Documentation Table 2-1 lists part numbers to order documentation. Table 2-1. Helpful Documentation Item Description or Use Part Number HP LaserJet Printer Family Paper Specification Guide A guide to using paper and other print media with HP LaserJet printers. 5021-8909 PCL 5/PJL Technical Reference Documentation Package A guide to using printer commands with HP LaserJet printers. 5021-0330 HP LaserJet 5000, 5000 N, and 5000 GN Printers User’s Guide An additional copy of the user’s guide.
Phone Numbers for Ordering ● SMO (Support Materials Organization) 1-800-227-8164 (U.S. only) ● SME (Support Materials Europe) (49 7031) 142253 Exchange Program HP offers remanufactured assemblies for some parts. These are identified in Chapter 8 and can be ordered through Support Materials Organization (SMO), or Support Materials Europe (SME). Consumables Paper and Toner Cartridges can be ordered directly from HewlettPackard. See Chapter 8 for ordering information.
HP FIRST HP FIRST (Fax Information Retrieval Support Technology) is a phone-in fax service that provides technical information for HP LaserJet users as well as service personnel. Receiving a fax requires a group 3 facsimile machine or fax card.
North American Response Center (NARC) The North American Response Center (NARC) is available to assist service technicians. The NARC can be reached at 1-800-544-9976. Other Areas Outside of North America and Europe, contact your local HP sales office for assistance in obtaining technical support.
Toner Cartridge Information The Toner Cartridge is designed to simplify replacement of the major “consumable” parts. The Toner Cartridge contains the printing mechanism and a supply of toner. At 5% page coverage, a Toner Cartridge will print approximately 10,000 pages. However, a Toner Cartridge should print more pages if regularly printing pages with less coverage, such as short memos. The cartridge may print fewer pages if routinely printing dense print.
Warranty Statement This warranty gives specific legal rights. There may also be other rights which vary from area to area. Refer to the User’s Guide for further warranty information, or see the warranty card included with the printer.
2-10 Service Approach EN
3 Printer Operation Overview This chapter discusses the following: EN ● Using the Control Panel ● Control Panel Menus ● Service Mode ● Testing the Printer ● Resetting the Printer ● System Configuration ● Printer I/O Configuration Overview 3-1
Using the Control Panel Control Panel Layout The printer’s Control Panel consists of the following: READY 2-line display Ready Data Attention Go Menu Item - Value + Cancel Job Figure 3-1 Select Control Panel Layout Control Panel Lights Table 3-1. Control Panel Lights Light Indication Ready The printer is ready to print. Data The printer is processing information. Attention Action is required. See the Control Panel display.
Control Panel Keys Table 3-2. Control Panel Keys Key Function [Go] ● ● ● ● ● ● ● ● Places the printer either online or offline. Prints any data residing in the printer’s buffer. Allows the printer to resume printing after being offline. Clears most printer messages and places the printer online. Allows the printer to continue printing with an error message such as TRAY x LOAD [TYPE] [SIZE] or UNEXPECTED PAPER SIZE.
Settings and Defaults The printer makes most printing decisions based on either temporary settings or permanent defaults. Note Settings sent from software applications override printer defaults. Table 3-3. Settings and Defaults Setting or Default Explanation Temporary Setting A value set for the current print job by the software application. For example, a request from the software to print three copies instead of the Control Panel default value of one copy is a temporary setting.
Control Panel Menus Press [Menu] for access to all Control Panel menus. When additional trays or other accessories are installed in the printer, new menu items automatically appear. To change a Control Panel setting: Note 1 Press [Menu] until the desired menu appears. 2 Press [Item] until the desired item appears. 3 Press [- Value +] until the desired setting appears. 4 Press [Select] to save the selection.
Information Menu This menu contains printer information pages that give details about the printer and its configuration. To print an information page, scroll to the desired page and press [Select]. Table 3-4. Information Menu Item Explanation PRINT MENU MAP The menu map shows the layout and current settings of the Control Panel menu items. PRINT CONFIGURATION The Configuration Page shows the printer’s current configuration.
Paper Handling Menu When paper handling settings are correctly configured through the Control Panel, you can print by choosing the type and size of paper from the printer driver or software application. Some items in this menu (such as duplex and manual feed) can be accessed from a software application, or from the printer driver (if the appropriate driver is installed). Printer driver and software application settings override Control Panel settings. Table 3-5.
Table 3-5. Paper Handling Menu (continued) Item Values Explanation TRAY 4 TYPE= PLAIN For supported paper types see page 1-14. This item appears only when a fourth paper tray is installed. Set the value to correspond with the paper type currently loaded in Tray 4. MANUAL FEED=OFF OFF ON Feed the paper manually from Tray 1, rather than automatically from a tray. When MANUAL FEED=ON and Tray 1 is empty, the printer goes offline when it receives a print job and displays MANUALLY FEED [PAPER SIZE].
Table 3-5. Paper Handling Menu (continued) Item Values CONFIGURE FUSER MODE NO MENU=NO YES Explanation Configure the fuser mode associated with each paper type. (This is only necessary if you are experiencing problems printing on certain paper types.) NO: The fuser mode menu items are not accessible. YES: Additional items appear (see below). Note To see the default fuser mode for each paper type, select YES, scroll back to the Information Menu, and print a menu map (page 3-6).
Print Quality Menu Some items in this menu can be accessed from a software application, or from the printer driver (if the appropriate driver is installed). Printer driver and software application settings override Control Panel settings. Table 3-6. Print Quality Menu Item Values Explanation RESOLUTION= FASTRES 1200 300 600 FASTRES 1200 PRORES 1200 Select the resolution from the following values: 300: Produces draft print quality at the printer’s maximum speed (16 ppm).
Table 3-6. Print Quality Menu (continued) Item Values Explanation RET=MEDIUM OFF LIGHT MEDIUM DARK Use the printer’s Resolution Enhancement technology (REt) setting to produce print with smooth angles, curves, and edges. REt does not affect print quality when the print resolution is set to ProRes 1200. All other print resolutions, including FastRes 1200, benefit from REt. Note It is best to change the REt setting from the printer driver or software application.
Table 3-6. Print Quality Menu (continued) Item Values Explanation TONER DENSITY=3 1 2 3 4 5 Lighten or darken the print on the page by changing the toner density setting. The settings range from 1 (light) to 5 (dark), but the default setting of 3 usually produces the best results. Use a lower toner density setting to save toner. Note It is best to change the toner density from the printer driver or software application. (Driver and software settings override Control Panel settings.
Printing Menu Some items in this menu can be accessed from a software application, or from the printer driver (if the appropriate driver is installed). Printer driver and software application settings override Control Panel settings. Table 3-7. Printing Menu Item Values Explanation COPIES=1 1 to 999 Set the default number of copies by selecting any number from 1 to 999. Press [-Value+] once to change the setting by increments of 1, or hold down [-Value+] to scroll by increments of 10.
Table 3-7. Printing Menu (continued) Item Values Explanation UNIT OF MEASURE=INCHES INCHES MILLIMETERS This item appears only when (110 V printers) or MILLIMETERS measurement for the custom paper size. (220 V printers) X DIMENSION= 12.28 INCHES (110 V printers) or 312 MILLIMETERS CONFIGURE CUSTOM PAPER=YES. Select the unit of 3.00 to 12.28 INCHES (110 V printers) or 76 to 312 MILLIMETERS (220 V printers) This item appears only when CONFIGURE CUSTOM PAPER=YES.
Table 3-7. Printing Menu (continued) Item Values Explanation PCL FONT SOURCE=INTERNAL INTERNAL SOFT SLOT 1, 2, or 3 INTERNAL: Internal fonts. SOFT: Permanent soft fonts. SLOT 1, 2, or 3: Fonts stored in one of the three DIMM slots. PCL FONT NUMBER=0 0 to 999 The printer assigns a number to each font and lists them on the PCL Font List. The font number appears in the Font # column of the printout. PCL FONT PITCH= 10.00 0.44 to 99.99 This item might not appear, depending on the font selected.
Table 3-7. Printing Menu (continued) Item Values Explanation COURIER=REGULAR REGULAR DARK Select the version of Courier font to use: REGULAR: The internal Courier font available on the HP LaserJet 4 series printers. DARK: The internal Courier font available on the HP LaserJet III series printers. Both fonts are not available at the same time. WIDE A4=NO NO YES The Wide A4 setting changes the number of characters that can be printed on a single line of A4 paper.
Configuration Menu Items in this menu affect the printer’s behavior. Configure the printer according to your printing needs. Table 3-8. Configuration Menu Item Values Explanation POWERSAVE= 30 MINUTES OFF 15 MINUTES 30 MINUTES 1 HOUR 2 HOURS 3 HOURS Set the printer to enter PowerSave after it has been idle for a specified amount of time. Turning PowerSave off is not recommended. The PowerSave feature does the following: 1. Minimizes the amount of power consumed by the printer when it is idle. 2.
Table 3-8. Configuration Menu (continued) Item Values RESOURCE SAVE= OFF OFF ON AUTO PCL MEMORY= 400K 0K and up 3-18 Printer Operation Explanation Dedicate printer memory to save each language’s permanent resources. (You might need to add memory to the printer in (8 MB total is required to order for this item to appear.) The amount of memory set aside can be different for see this message.) each installed language.
Table 3-8. Configuration Menu (continued) Item Values Explanation PS MEMORY= 400K 0K and up (This value depends on the amount of installed memory. 8 MB total is required to see this message.) This item appears only when RESOURCE SAVE=ON. Select the amount of memory used for saving PS resources. Printer default is the minimum amount of memory needed to perform resource saving for PS. Press [-Value+] to change settings by increments of 10 (up to 100 KB) or by increments of 100 (above 100 KB).
Table 3-8. Configuration Menu (continued) Item Values Explanation AUTO CONTINUE= ON ON OFF Determine how the printer reacts to errors. ON: If an error occurs that prevents printing, the message will display, and the printer will go offline for 10 seconds before returning online. OFF: If an error occurs that prevents printing, the message will remain on the display and the printer will remain offline until [Go] is pressed.
Table 3-8. Configuration Menu (continued) Item Values Explanation MOPIER MODE=STANDARD STANDARD ENHANCED OFF Determine how the mopier functions behave. This item appears only when there is at least 8 MB of memory or an optional hard disk is installed. STANDARD: This option is available if there is either a hard disk installed or a RAM disk configured in memory. This option uses I/O data stored in printer memory for generating multiple original prints.
Table 3-8. Configuration Menu (continued) Item Values RAM DISK SIZE=xxxK 0K and up Explanation Determine the size of the RAM disk. This (This value depends on item appears if RAM DISK=ON or AUTO. the amount of installed Press [-Value+] to change settings by memory.) increments of 100. Note This setting cannot be changed if RAM DISK=AUTO. Changing this value will cause the printer to reinitialize when it becomes idle.
Table 3-8. Configuration Menu (continued) Item Values Explanation MAINTENANCE MESSAGE=OFF OFF This item appears only after the PERFORM PRINTER MAINTENANCE message displays. OFF: The PERFORM PRINTER MAINTENANCE message will be cleared and will not be displayed again until the next maintenance is due. The message should not be turned off unless the printer maintenance has been performed. If the required maintenance is not performed, the printer’s performance will degrade.
I/O Menu Items in the I/O (input/output) Menu affect the communication between the printer and the computer. Table 3-9. I/O Menu Item Values Explanation I/O TIMEOUT=15 5 to 300 Select the I/O timeout period in seconds. (I/O timeout refers to the time, measured in seconds, that the printer waits before ending a print job.) This setting allows you to adjust timeout for best performance. If data from other ports appear in the middle of your print job, increase the timeout value.
Table 3-9. I/O Menu (continued) Item Values Explanation I/O BUFFER SIZE= 100K 10K and up This item appears only when I/O BUFFER=ON. Specify the amount of memory for I/O buffering. The maximum amount of memory available for I/O buffering is determined by the amount of memory installed in the printer, the languages installed in the printer, and by other memory allocations that must be made. Press [-Value +] to change settings by increments of 10 (up to 100 KB) or by increments of 100 (above 100 KB).
Table 3-9. I/O Menu (continued) Item Values Explanation SERIAL ROBUST XON=ON ON OFF This item appears only when SERIAL PACING=XON/XOFF. Select the method for generating XONs. ON: The printer sends an XON when the printer is online and when sufficient buffer space is available. If the host does not receive data within approximately one second, the printer will transmit additional XONs at one-second intervals until the host receives data.
EIO Menu (Networked Printers) EIO (Enhanced Input/Output) Menus depend on the particular accessory product installed in an EIO slot of the printer. If the printer contains an HP JetDirect print server EIO card, you can configure basic networking parameters using the EIO Menu. These and other parameters can also be configured through HP JetAdmin. Table 3-10. EIO Menu Item Values Explanation CFG NETWORK=NO NO YES NO: The JetDirect Menu is not accessible. YES: The JetDirect Menu appears.
Table 3-10. EIO Menu (continued) Item Values Explanation CFG TCP/IP=NO NO YES NO: The TCP/IP Menu is not accessible. YES: The TCP/IP Menu appears. In the TCP/ IP Menu, you can specify BOOTP=YES for TCP/IP parameters to be automatically loaded from a bootp or DHCP server when the printer is turned on. If you specify BOOTP=NO, you can manually set selected TCP/IP parameters from the Control Panel.
Resets Menu Use this menu with caution. You can lose buffered page data or printer configuration settings when you select these items. Only reset the printer under the following circumstances: ● You want to restore the printer’s default settings. ● Communication between the printer and computer has been interrupted. ● You are using both the serial and parallel I/O ports, and one of the ports is having problems.
Service Mode Service Mode should be used only by authorized service personnel. While in Service Mode, you can: ● Verify and set the page count and serial number. These are displayed on the Configuration Page. ● Set the Cold Reset Default. (This sets the factory default paper size to either Letter or A4). ● Turn the Diagnostic Functions on or off (for developers only). ● Clear the event log. ● Set the interval at which the PERFORM PRINTER MAINTENANCE message appears on the control panel.
Service Menu Figure 3-2 Service Menu Setting the Page Count, Maintenance Count, and Serial Number The page count and serial numbers are stored in Non-Volatile Memory. If it is necessary to replace the Formatter PCA, the page count should be set to the current value to reflect the age of the print engine. The procedure for setting the serial number is similar to setting the page count.
Page Count The page count stored in NVRAM and displayed on the Configuration Page printout represents the number of pages which the printer has printed (excluding engine test prints). If it becomes necessary to repair a printer by installing a new Formatter, the page count must be reset so that it represents the age of the printer’s engine rather than the age of the Formatter. The page count value is changed using a different method than is used for other control panel values.
Table 3-12. Changing the Page Count Key Press Display Description SERVICE MODE [Menu+] SERVICE MENU [Item+] PAGES=0000000 * Enter the SERVICE MENU. Advance to the first item in the SERVICE MENU. [Select] PAGES=0000000 * Advance the cursor one digit to the right. [Select] PAGES=0000000 * Advance the cursor one digit to the right. [Value+] PAGES=0010000 * Increase the value of the third digit by one.
Maintenance Page Count The maintenance page count should be reset only after a maintenance kit has been installed. This will reset the maintenance counter so that the message PERFORM PRINTER MAINTENANCE will display another 150,000 pages later (default). ● Hold down the [Item-] and [Value-] keys. ● Turn the printer on. ● Wait for RESET MAINTENANCE COUNT to be displayed and then release both keys.
Testing the Printer When you print a Configuration Page, the printer checks its internal controller and I/O interface, and then prints a test page. You can review the Configuration Page printout to verify proper installation of such options as paper trays or printer languages. For more information, see page 7-45. Engine Test The engine test print can be used to verify that the print engine is functioning correctly. For more information, see page 7-9.
Resetting the Printer Cold Reset Cold Reset clears all data from the printer memory and sets all the defaults back to the factory settings. CAUTION Performing a Cold Reset resets the JetDirect configuration. To avoid making changes to your configuration, remove the JetDirect card before performing a cold reset. If possible, print a Configuration Page prior to performing a Cold Reset. This will document current settings for later reference. To perform a cold reset: 1 Turn off the printer.
System Configuration MS-DOS System Configuration To communicate properly with the printer, the MS-DOS environment requires the addition or modification of MODE commands in the AUTOEXEC.BAT file. Add or modify the MODE command(s), depending on the interface configuration, as follows: Parallel DOS Commands Most IBM and AT compatible computers default to a parallel printer port.
Serial MS-DOS Commands Most IBM compatible computers default to a parallel printer port. To ensure that information is sent to the serial printer port, type the following MS-DOS commands at the MS-DOS prompt, or include them in the AUTOEXEC.BAT file: MODE COM1: 9600, N, 8, 1, B MODE LPT1: =COM1 Note These examples assume that you are using serial printer COM1. If you are using COM2 or COM3, replace COM1 with the printer port that you are using.
Printer I/O Configuration Parallel Menu The default setting for the HIGH SPEED PARALLEL I/O is YES. If it is set to NO, the interface runs at a slower speed that is compatible with older computers. When the default is set to YES, the parallel interface runs at a higher rate supported by newer computers. Advanced Functions The ADVANCED FUNCTIONS feature of the printer enables bidirectional communications between the printer and the host. The default setting is ON.
Pacing (Handshaking) Pacing (or “handshaking”) is a type of communication between the printer and the computer. This is an important setting in the printer because it allows the printer to tell the computer when to send information. If the printer is unable to receive information, for example, when the print buffer is full or when the printer is out of paper, a signal is sent to the computer to stop sending information.
4 Printer Maintenance Overview This chapter discusses the following: EN ● Cleaning the Printer and Accessories ● Preventative Maintenance Overview 4-1
Cleaning the Printer and Accessories To maintain high print quality and performance, thoroughly clean the printer and the paper handling accessories: ● Every time you change the Toner Cartridge (run a cleaning page). ● After printing approximately 15,000 pages. ● Whenever print quality problems occur. Clean the outside surfaces with a lightly water-dampened cloth. Clean the inside parts as indicated in Table 4-1. Observe the warning and caution below.
Table 4-1. Cleaning the Printer Component Cleaning Method / Notes Outside Covers Use a water-dampened cloth. Do not use solvents or ammoniabased cleaners. Inside General With a dry lint-free cloth, wipe any dust, spilled toner, and paper particles from the paper path area, the registration roller, and the Toner Cartridge cavity. Paper Pickup, Feed, and Separation Rollers Use a water-dampened, lint-free cloth. Separation Pad Use a dry, lint-free cloth.
Using the Printer Cleaning Page If toner specks appear on the front or back side of your print jobs, follow the procedure below. From the printer’s control panel, do the following: Note 1 Press [Menu] until PRINT QUALITY MENU appears. 2 Press [Item] until CREATE CLEANING PAGE appears. 3 Press [Select] to create the cleaning page. 4 Follow the instructions on the cleaning page to complete the cleaning process.
Preventative Maintenance The preventative maintenance cycle for this printer, conducted by service personnel, is every 150,000 pages. To order the maintenance kit see page 8-4. The kit contains one Fuser, one Transfer Roller, one Tray 1 Pickup Roller, one Tray 1 Separation Pad, two 250-sheet Tray Pick Rollers, two 250-sheet Tray Separation Pads and Springs, four 500-sheet Tray Pick D-Rollers, and two 500-sheet Tray Feed/ Separation Rollers.
Table 4-2. Life of Components (continued) Part name Part No.
5 Functional Information Overview This chapter discusses the following: EN ● Power Supply Subsystem ● DC Controller Subsystem ● Formatter PCA ● Control Panel ● Interface PCA ● Image Formation System ● Paper Feed System ● Basic Sequence of Operation Overview 5-1
Printer Subsystems This chapter presents a generalized functional overview of the printer and the printing processes.
Power Supply System AC/DC Power Distribution The AC line voltage for the printer is applied through the main switch (SW101) and supplied to the low-voltage power supply circuit through the fuse (FU1). The low-voltage power supply divides the AC voltage to +24 VDC, +5 VDC and +3.4 VDC and supplies them to the DC controller PCA. This circuit generates a zero-cross signal (ZEROX) and supplies it to the DC controller PCA. +3.4 VDC is supplied to ICs on the DC controller PCA and the BD PCA.
Figure 5-2 Low Voltage Power Supply Circuit If a short circuit or other problems on the load side cause an excessive current flow from the +24 VDC or +3.4 VDC power supplies or generate abnormal voltage, the excess-current protection system and excess-voltage protection system automatically shut off the output voltage to protect the power supplies.
Overcurrent Overvoltage Protection This circuit located on the DC controller PCA always monitors an abnormal rise of the fusing roller temperature. If an error occurs, this circuit outputs a signal to turn the relay (RL1) off and interrupt the power to the fusing roller heater. The circuit operates as follows. When the fusing roller heater temperature rises and the output voltage of the thermistor exceeds about 0.5 V (230°C), pin 7 of the comparator (IC304) goes “L.
High Voltage Power Distribution Figure 5-3 High Voltage Power Supply Circuit In response to the instructions from the microprocessor (CPU: IC301) on the DC controller, this circuit applies the superimposed voltage of DC voltage and AC voltage to the primary charging roller and developing cylinder, and a positive or negative DC voltage to the transfer charging roller.
Toner Cartridge Detection The Toner Cartridge has a toner sensor. The circuit compares the output value of the developing AC bias and the output value (ANT) from the antenna inside the cartridge, and outputs the toner detection signal. The CPU detects the remaining toner level and the presence of the cartridge when the developing bias is applied to the developing cylinder. The remaining toner level is always detected when the developing bias is applied.
Figure 5-4 DC Controller PCA Laser and Scanner Drive Based on information received from the Formatter, the DC Controller Board sends signals to the Laser/Scanner Assembly to modulate the laser diode on and off and to drive the Laser/Scanner motor. See “Image Formation System” on page 5-18 for more information.
Paper Motion Monitoring and Control The DC Controller Board controls paper motion by continuously monitoring the various paper sensors, and coordinating paper movement with the other print processes. For more information, see “Paper Feed System” on page 5-29. Solenoids, Sensors, Clutches, and Switches See “DC Controller PCA Inputs and Outputs” on page 7-107. Engine Test Print See “Engine Test” on page 7-9.
Motors See “Timing Diagram” on page 5-47 for specific timing details for the printer motors. The Main Motor, MT1, is controlled by the DC Controller Board. The Main Motor drives the main Gear Assembly and rotates during the Initial Rotation period (following power-on), the Print period, the Last Rotation period, or whenever the printer’s Top Cover is opened and closed. Figure 5-5 Main Motor Control The Main Motor is a DC brushless motor with hall elements, and is unified with the motor drive circuit.
The Scanner Motor is controlled and monitored by the DC Controller Board. It rotates the scanner mirror during the Initial Rotation period and the print period. The fan motor is a two-phase, four-pole DC brushless motor containing a hall element and forms a unit along with the motor drive circuit. When the printer turns on, the CPU (IC301) on the DC controller PCA makes pin 99 (/HALFFAN) “H” and runs the fan motor half a turn.
Formatter System The Formatter PCA is responsible for the following: ● Controlling the PowerSave mode. ● Receiving and processing print data from the various printer interfaces. ● Monitoring Control Panel inputs and relaying printer status information (through the Control Panel and the Bidirectional I/O). ● Developing and coordinating data placement and timing with the print engine. ● Storing font information. ● Communicating with the host computer through the Bidirectional Interface.
The printer exits PowerSave mode and enters the warm up cycle when any of the following occurs: Note ● A print job, valid data, or a PML or PJL command is received at the parallel port or an EIO card. ● A Control Panel key is pressed. ● The top cover is opened and then closed. ● A paper tray is opened and then closed. ● The Engine Test button is pressed. Printer error messages override the PowerSave message.
Input/Output Parallel Interface The Formatter PCA receives incoming data through its bidirectional interface (IEEE 1284). The I/O provides high speed and two way communication between the printer and the host, allowing the user to change printer settings and monitor printer status from the host computer. The user may configure the HIGH SPEED item in the Control Panel menu. The default setting, YES, allows the I/O to run at the higher speeds supported by most newer computers.
Printer Memory Note If the printer encounters difficulty managing available memory, a clearable warning message will be displayed on the Control Panel. Some printer messages are affected by the Auto Continue and Clearable Warning settings from the Configuration Menu in the printer’s Control Panel. If CLEARABLE WARNING=JOB is set on the Control Panel, warning messages display on the Control Panel until the end of the job from which they were generated.
DIMM Slots The DIMM slots may be used to add memory, fonts, or firmware upgrades. Note that DIMMs and SIMMS are not compatible. There are two types of DIMMs supported: EDO DIMMs are 32-bit, 100-pin, 60nsec. SDRAM DIMMs are 32-bit, 100-pin, 66MHz. Non-Volatile Memory (NVRAM) The printer uses NVRAM to store I/O and information on the print environment’s configuration. The contents of NVRAM are retained when the printer is turned off or disconnected.
PJL Overview Printer Job Language (PJL) is an integral part of configuration, in addition to the standard Printer Command Language (PCL). With standard cabling, PJL allows the printer to perform functions such as: ● Two-way communication with the host computer through a Bidirectional Parallel connection. The printer can tell the host such things as the Control Panel settings, and allows the Control Panel settings to be changed from the host. ● Dynamic I/O switching.
Image Formation System The image formation system is the main part of the printer, and consists of six stages: 1. Cleaning 2. Conditioning 3. Writing 4. Developing 5. Transferring 6. Fusing When the Formatter Board sends the print signal to the DC Controller Board, it drives the main motor to rotate the photosensitive drum, the developing cylinder, the primary charging roller, and the transfer charging roller.
Figure 5-6 Image Formation System After the image has been transferred to the paper, it is then fused onto the paper by heat and pressure at the Fuser.
Toner Cartridge A major portion of the Image Formation system is contained in the cartridge as shown in the figure below. The Toner Cartridge is the “heart” of the Image Formation System. It houses the cleaning, conditioning, and developing steps of the process. The Toner Cartridge contains the photosensitive drum, primary charging roller, developing station, toner cavity, and cleaning station.
Photosensitive Drum The special properties of the photosensitive drum allow an image to be formed on the drum surface and then transferred to paper. The drum is an aluminum cylinder. The outside of the cylinder is coated with a layer of organic-photoconductive material (OPC) which is nontoxic. The OPC material has properties similar to a photo-resistor. It becomes electrically conductive when exposed to light.
Cleaning the Drum In the transfer stage, not all the toner is transferred to the paper, but some remains on the photosensitive drum. In this stage, the residual toner is cleaned so that the next print image will be clear and distinct. Figure 5-9 Cleaning the Drum The residual toner on the drum surface is scraped away with the cleaning blade to clean the drum surface in preparation for the next print. The removed toner is collected into the cleaner container.
Conditioning the Drum After the drum is cleaned, it must be conditioned. This process consists of applying a uniform negative charge on the surface of the drum with the primary charging roller. The primary charging roller is coated with conductive rubber with an AC bias applied to erase any residual charges and maintain a constant drum surface to create a uniform negative potential on the drum surface. The amount of DC voltage is modified by the print density setting.
Writing the Image During the writing process, a modulated laser diode projects the beam onto the rotating six-sided scanning mirror. As the mirror rotates, the beam reflects off the mirror, through a set of focusing lenses, through a slot in the rear of the Toner Cartridge, and onto the photosensitive drum. The beam sweeps the drum from left to right, discharging the negative potential wherever the beam strikes the surface.
Developing the Image The developing process develops the latent electrostatic image into a visible image on the drum. The developing unit consists of a metallic cylinder that rotates around a fixed magnetic core inside the toner cavity. Toner is a powdery substance made of black plastic resin bound to iron particles, which is uniformly attracted to the magnetic core of the cylinder.
Transferring the Image During the transferring process the toner image on the drum surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the negatively charged toner on the drum surface to be attracted to the page. The small diameter of the drum, combined with the stiffness of the paper, causes the paper to peel away from the drum. The static eliminator teeth also help separate the paper from the drum.
Image Fusing/Variable Fusing Temperature During the fusing process, the toner is fused into the paper by heat and pressure to produce a permanent image. The paper passes between a heated fusing roller and a soft pressure roller. This melts the toner and presses it into the paper. The fusing roller contains a ceramic heating element that provides heat for the fusing process. Fusing temperature is monitored by the DC Controller Board, via the thermistor TH1303.
Variable Fusing Temperature Figure 5-15 Fusing Temperature Control Variable Fusing Temperature is a feature that gives the user or service technician the ability to adjust the fusing temperature based on the media being used in the printer. The default mode is Normal and should be optimal for most users. There is an optional Vellum, Low, Normal, and High Fuser Mode selection. If very heavy or rough media is being used, then High Fuser Mode is beneficial.
Paper Feed System Figure 5-16 Paper Path The paper in Tray 1 is detected by the Tray 1 paper sensor (PS401). The paper in Tray 2 is detected by the Tray 2 paper sensor (PS301). The size of the paper in Tray 2 and the presence of Tray 2 installed in the printer are detected by four switches (SW403, SW404, SW405, and SW406) on the terminal PCA. When the paper is fed from Tray 2, the Tray 2 pickup solenoid (SL306) and the feed roller clutch (CL406) turn on while the main motor (M1) is rotating.
The paper passes through the registration roller paper sensor (PS403) and stops at the registration roller to loop the leading edge and its skew is corrected. Then the registration clutch (CL405) turns on to restart paper feed. The DC controller PCA sends the top of page signal (/TOP) to the Formatter PCA within a specified period of time after the top of page sensor (PS402) detects the leading edge of the paper.
Printing from Tray 1 The presence of paper in Tray 1 is detected by the Tray 1 Paper Sensor (PS401). When the Formatter PCA sends the /PRNT (print signal) to the printer, the CPU turns the Tray 1 pickup solenoid (SL404) on within the specified period of time for the main motor (M1) and the scanner motor to start and the printer to be ready to print. This turns the cam on and lifts the middle plate where the paper is loaded. The paper touches the Tray 1 feed roller.
Figure 5-17 Tray 1 Pickup 5-32 Functional Information EN
Printing from Tray 2 When the Formatter PCA sends the /PRNT (print signal) to the printer, the CPU turns the Tray 2 pickup solenoid (SL306) on about 0.15 seconds after the main motor (M1) starts rotating, then turns on the feed roller clutch (CL406). The main motor rotates the Tray 2 pickup roller and feed roller. The Tray 2 pickup roller rotates a full circle with the Tray 2 pickup solenoid (SL306) and picks up one sheet of paper from the tray. The paper is fed into the printer as the feed roller rotates.
Figure 5-19 Paper Skew Loop-forming 5-34 Functional Information EN
Printing from the Optional 500-sheet and 250-sheet Trays There are two kinds of paper feeders: 250-sheet and 500-sheet. The paper feeder operation sequence is controlled by the paper handling PCA. The paper handling PCA has the 8-bit microcomputer, and controls the serial communications between the operation sequence control of the paper handling and the DC controller PCA of the printer. The paper handling PCA drives motors and solenoids with various commands from the DC controller PCA.
Figure 5-21 500-sheet Paper Feeder 5-36 Functional Information EN
Paper Jam To detect the presence of paper and whether the paper has been correctly fed, the following paper sensors are installed: ● Registration roller paper sensor (PS403) ● Top of page sensor (PS402) ● Fuser paper delivery sensor (PS1306) If the paper does not reach or pass through any of the sensors within the specified period of time, the microprocessor (CPU) on the DC Controller PCA notifies the Formatter of a paper jam.
Duplexer This function is to reverse the one side printed paper from the printer and refeed it into the printer. The Duplexer operation sequence is controlled by the duplex driver PCA. The duplex driver PCA has the 8-bit microcomputer, which controls the serial communications between the operation sequence control of the duplexing unit and the DC controller PCA of the printer. The duplex driver PCA drives motors and solenoids with various commands from the DC controller PCA.
Figure 5-22 EN Paper Feed for the Duplexer Paper Feed System 5-39
Reversing System The duplexing driver PCA receives the duplex admission command from the printer first. It turns on the Duplexer deflector drive solenoid (SL1701), and the Duplexer deflector in the printer then starts to send the paper into the Duplexer. Within a specified period of time after receiving the command, the duplexing driver PCA also drives the reversing motor (PM1701) in straight rotation, and the reversing rollers 1, 2, and 3 in XX direction.
Figure 5-24 EN Duplexing Unit Paper Feed System 5-41
Uncurling Function This printer has the function to minimize a paper from wrinkle and paper edge crease due to curl. The printer sends the command to the duplexing driver PCA by receiving the uncurling command sent from the formatter PCA. The duplexing driver PCA executes one of the operations below by the command sent from the printer. 1 Skips uncurling operation 2 Executes pause operation 3 Executes dance operation Pause Mode Pause mode reduces paper curl.
Figure 5-25 Pause Mode Dance Mode Dance mode reduces paper curl by refeeding paper into the duplexing unit three times. The paper refeeds into the duplexing unit about 30 mm by using the pause mode. Then the duplexing driver PCA rotates the reversing motor (PM1701) counter clockwise (CCW), and the reversing rollers 1, 2, and 3 rotate in reverse. In this way, the paper comes out from the duplexing unit about 125 mm and pauses. Then, the duplexing driver PCA rotates PM1701 clockwise (CW).
Figure 5-26 Dance Mode Paper Jam in the Duplexer The following sensors are located to detect the presence of paper and to determine whether the paper is correctly fed. ● reversing unit paper sensor (PS1701) ● refeed paper sensor (PS1703) If the paper does not reach or pass through any of the sensors within the specified period of time, the microprocessor (CPU) on the DC Controller PCA notifies the Formatter of a paper jam.
Basic Sequence of Operation The Formatter PCA and the DC Controller Board share information during printer operation. The Interface PCA forms a link which operates as a serial data bus. This allows printer status, command, and dot-image data to be passed between the two PCAs. Table 5-1 shows the general timing of the printer events. The following events take place during normal printer operation: Table 5-1.
Table 5-1. Printer Timing Period Timing LSTR (last rotations) After the primary DC voltage Delivers the final page turns off until the Main Motor and cleans the transfer charging roller. stops. 5-46 Functional Information Purpose Remark As soon as the /PRNT signal is input from the Formatter PCA, the printer enters the INTR period.
Figure 5-27 EN Timing Diagram Basic Sequence of Operation 5-47
5-48 Functional Information EN
6 Removing and Replacing Parts Overview This chapter discusses the following: EN ● User Installable Accessories ● Removal and Replacement Strategy ● Removing Covers ● Removing Assemblies Overview 6-1
User Installable Accessories Memory Upgrade CAUTION Static electricity can damage dual inline memory modules (DIMMs). When handling DIMMs, either wear an antistatic wrist strap or frequently touch the surface of the DIMM’s antistatic package, then touch bare metal on the printer. If you have not already done so, print a configuration page to find out how much memory is installed in the printer before adding more memory. 6-2 Removing and Replacing Parts 1 Turn the printer off.
6 Slide the formatter board back into the printer and tighten the two screws. 7 If an optional duplexer is installed, reattach the cable tray and the rear section of the duplexer. Reattach any interface cables and the power cord. Turn the printer on and test the DIMM. Note Single in-line memory modules (SIMMs) used on previous HP LaserJet printers are not compatible with the printer.
If an optional duplexer is installed: 6-4 Removing and Replacing Parts 1 Slide the rear section of the duplexer away from the printer. 2 Remove the rear section of the duplexer by lifting and rotating the rear section to clear all of the tabs in the grooves, as illustrated. 3 Unplug the power cord and disconnect any cables. 4 Remove the cable tray by lifting it out of position, as illustrated. 5 Reverse these steps to install the cable tray and the rear section of the duplexer.
Checking Memory Installation Follow this procedure to verify that DIMMs are installed correctly: 1 Check that the printer’s control panel displays READY when the printer is turned on. If an error message appears, a DIMM might have been incorrectly installed. Check the printer messages. 2 Print a new configuration page. 3 Check the memory section on the configuration page and compare it to the configuration page printed before the DIMM installation.
Figure 6-1 Installing EIO Cards or Mass Storage Devices 6-6 Removing and Replacing Parts EN
Removal and Replacement Strategy This chapter documents removal and replacement of major assemblies. Replacement is generally the reverse of removal. Occasionally, information is included to provide direction for difficult or critical replacement procedures. WARNING! Unplug the power cord from the power outlet before attempting to service the printer. If this warning is not followed, severe injury may result.
Phillips Figure 6-2 Posidriv Phillips vs. Posidriv Screwdrivers Table 6-1. Screws Used in the Printer Drawing and Description Purpose Used to fasten metal to metal when good electrical contact is needed. Threaded Phillips with captive star washer Used to fasten metal or plastic to plastic mainframes. Silver Self-tapping Phillips screw Used to fasten metal or plastic to plastic mainframes.
Table 6-1. Screws Used in the Printer (continued) Drawing and Description Purpose Used to fasten metal or plastic to threaded plastic or metal. Threaded Phillips screw with lock and flat washer Used to ground and align the DC Controller pan. Spring Screw Used to fasten the DC Controller.
Removing Covers Rear Door / Rear Output Bin 1 Figure 6-3 Face the rear of the printer. Press the two locking tabs toward the center of the printer, releasing the Rear Door. Rear Door/Rear Output Bin .
2 Figure 6-4 Support Strap 3 Hint EN The plastic support strap is located on the left side of the printer. To release the strap, pinch the top of the strap with your index finger underneath the strap, and your thumb on top of the tab. Squeeze and lift up from the bottom, while pulling out (Figure 6-4). Slide the door to the left, and then remove it from the printer. For reassembly, insert the pin on the left side of the cover first.
Top Cover Facing the front of the printer, open the Top Cover and remove the Toner Cartridge. CAUTION To prevent damage to the toner cartridge, do not expose it to light for more than a few minutes. Figure 6-5 Toner Cartridge Engagement Arm 1 Release the Toner Cartridge Engagement Arm from the inside of the Top Cover (Figure 6-5). The shaft of the Engagement Arm fits through a molded plastic ring on the left side of the Top Cover.
CAUTION EN It is critical that step 1 be performed before you attempt to remove the Top Cover. If you damage the Arm, the printer will not operate. A Top screws B Toner Cartridge Drive Arm C Rear screws 2 Remove the two self-tapping screws on the top of the chassis. 3 Remove the two self-tapping screws on the top portion of the back of the printer. (The Rear Cover needs to be opened or removed for the screws to be accessible.
4 Figure 6-6 The cable connecting the Control Panel to the printer chassis is on the left side of the Top Cover. Tilt the cover to the left as you lift it. Be careful not to stress the cable as you loosen the cover. Control Panel Cable 5 Disconnect the Control Panel cable from the printer chassis by grasping the wires and gently pulling the connector straight up. 6 Remove the Top Cover.
Control Panel Overlay and Control Panel Figure 6-7 EN 1 Remove the Top Cover (page 6-12). 2 The Control Panel Overlay is held in place on the Top Cover by two tabs on each side. Slide a small flat-blade screwdriver along the outside edge of the Control Panel Overlay, to disengage the two tabs on the outside of the cover. 3 Lift the Overlay off of the Control Panel. Releasing Control Panel Overlay 4 Remove the single self-tapping screw holding the Control Panel to the underside of the Top Cover.
Figure 6-8 Back Side of Top Cover Item Explanation A Direction to slide control panel out B Screw 6-16 Removing and Replacing Parts EN
Toner Cartridge Door Assembly Figure 6-9 EN 1 Remove the Top Cover (page 6-12). 2 Remove the Control Panel from the Top Cover (page 6-15). (The Control Panel must be removed before you can separate the Toner Cartridge Door from the Top Cover.) 3 Disengage the pins (A) by pressing outward, as shown below.
Front Cover and Tray 1 Front Cover and Tray 1 must be removed individually. See Figure 6-10. Figure 6-10 1 Open the Front Cover door. 2 Disengage the Tray 1 Guide pins from inside the Front Cover by pushing the Guides (C) outward. The Cover and Tray 1 will be separated. Press Tray 1 Guide against the printer. Front Cover Item Explanation A Front Cover B Tray 1 Guide C Guides 3 Release the Front Cover, allowing it to pivot freely on its keyed pins.
Figure 6-11 Tray 1 4 EN Release the Tray 1 Guide by allowing the guide to slide off the keyed pins at its lowest position (Figure 6-11).
Front Cover Pins Figure 6-12 Hint 1 Remove the Front Cover and Tray 1 (page 6-18). 2 Remove the screws (A) to free the Front Cover Pins. Front Cover Pins Item Explanation A Screws To install a self-tapping screw, first turn it to the left until it clicks, indicating the threads are seated. Then, turn it to the right to tighten. Do not over-tighten. If a self-tapping screw-hole becomes stripped, repair of the screw-hole or replacement of the affected assembly is required.
Face Down Assembly Figure 6-13 EN 1 Remove the Top Cover (page 6-12). 2 Face the back of the printer. 3 Squeeze the locking tabs inward, one side at a time, to release the Face Down Assembly. See Figure 6-13 4 Lift slightly and then remove the Assembly with a rolling motion away from you. Be careful not to break the two locator pins on the front of the Assembly.
Figure 6-14 Face Down Assembly Item Explanation A Locator Pins 6-22 Removing and Replacing Parts EN
Left and Right Side Covers The removal procedure is the same for both the left and the right side covers. See Figure 6-15. Figure 6-15 Hint EN 1 Remove the Top Cover (page 6-12). 2 Locate the tab in the top middle of the cover. Release the tab by pushing down on it. 3 Grab the side cover at the top by the front edge. With your other hand, grab the lower edge of the back. Rock the cover gently until it comes loose, and remove the cover. 4 Repeat the steps above for the other side cover.
Tray 1 Inner Cover 1 CAUTION Be sure to locate the Paper Sensor Flag on the left side of the Cover, before proceeding to step 3. It rests in an indention in the left side of the chassis and is easily broken. See Figure 6-16. 2 Figure 6-16 The Tray 1 Inner Cover is a plastic tray located at the top front of the printer. Remove the two self-tapping screws, (A) in Figure 6-17, holding the Cover to the front of the chassis.
Figure 6-17 Hint EN Tray 1 Inner Cover (front of printer) Item Explanation A Screws An extension of the Paper Sensor Flag fits into a slot in the Tray 1 Lift Plate (page 6-56). Orient the flag so that it aligns with both the slot and the indentation in the left side of the chassis.
Right and Left Corner Covers These covers are each secured by one self-tapping screw. Remove the screw, and lift off the cover.
Removing Assemblies Internal assemblies are shown in Figure 6-19. All references to the right and left are assumed to be relative to the front of the printer, unless otherwise specified.
Transfer Roller Assembly CAUTION Never touch the transfer roller with your fingers. Use unpowdered latex gloves if possible. Roll it up in a clean sheet of paper to protect it after removal. 1 Figure 6-20 Face the front of the printer, and lift the small green handle on the right side of the Registration Assembly, exposing the Transfer Guide (the metal plate that rests against the Transfer Roller). Remove the two self-tapping screws and carefully lift out the Transfer Guide.
Figure 6-21 Note EN Right Side of Transfer Roller Item Explanation A Clip B Cleaning Brush The Transfer Roller is held on the right side by a hinged clip. 2 Free the Transfer Roller from the hinged clip by lifting straight up using the blue cleaning brush located inside of the top cover (Figure 6-21). 3 Free the left side of the Transfer Roller by lifting straight up. Remove the Transfer Roller, being careful not to touch the roller with your fingers.
Fuser 1 Remove the Rear Door and Rear output bin (page 6-10). 2 Facing the back of the printer, remove the two machine screws holding the Fuser in the chassis. See Figure 6-22. 3 Using a small, flat bladed screw driver, lift at “D” to disengage the Fuser Assembly detents. Grasp the green Pressure Release Handles and pull the Fuser out of the chassis. Note The fuser power connection is on the left side of the assembly.
Paper Handling PCA Figure 6-23 Hint EN 1 Remove the Top Cover (page 6-12) and Left Side Cover (page 6-23). 2 Facing the left side of the printer, disconnect the ribbon cable from the PCA. 3 Remove two self-tapping screws and two machine screws from the PCA. 4 Rotate the PCA outward, and disconnect the five cables. See Figure 6-23.
Top Margin Adjustment When the terminal PCA is replaced in the field, the top margin needs to be re-adjusted. Also, if the top margin of test prints made after laser/scanner unit replacement is not 2.0 mm, this adjustment is necessary. The adjustment procedures are shown below. Figure 6-24 1 After setting the VR401 on the terminal PCA to the center position (+/-0), set A4-sized paper in the tray. Press the test print switch to make several test prints.
Figure 6-25 EN Location of VR401 Removing Assemblies 6-33
Main Gear Assembly Figure 6-26 1 Remove the Top Cover (page 6-12) and the Left Cover (page 6-23). 2 The Main Motor is located on a PCA (see Figure 6-26) on the back side of the Gear Assembly. Disconnect the Main Motor Cable. 3 Remove five self-tapping screws and the grounding screw (spring-loaded machine screw) that hold the Gear Assembly to the chassis.
Figure 6-27 Removing the Main Gear Assembly Item Explanation A Locating Tab B Engagement Arm 4 Rotate the bottom of the assembly out (Figure 6-27), and then lower it to release the Locating Tab (A) and remove the Main Gear Assembly. CAUTION Use caution when removing the assembly. The Toner Cartridge Engagement Arm may break if not handled carefully. Hint Remember to reconnect the cable at the top of the Main Gear Assembly after reinstalling it.
Pickup Gear Assembly Figure 6-28 1 Remove the Top Cover (page 6-12), Left Side Cover (page 6-23), and the Paper Handling PCA (page 6-31). 2 Remove the four self-tapping screws from the Gear Assembly. Figure 6-28 shows the Assembly and the location of the screws. 3 Release the small spring (B) on the gear. 4 Remove the Gear Assembly from the chassis.
Hint EN Item Explanation A Paper Feed Roller Assembly Gear B Location to Release Spring C Tray 2 Shaft Gear D Wire Clip E Screws Before replacing the Pickup Gear Assembly, route the cables through the wire clip behind the Left Corner Cover. Reattach the spring from the Tray 2 Shaft Gear to the Paper Feed Roller Assembly Gear.
Tray 1 Pickup Solenoid Figure 6-29 1 Remove the Pickup Gear Assembly (page 6-36). 2 Remove the Tray 1 Solenoid by removing one black machine screw and sliding the Solenoid assembly away from the Pickup Gear Assembly.
Fan Figure 6-30 EN 1 Remove the Top Cover (page 6-12) and Right Side Cover (page 6-23). 2 Disconnect the cable that supplies power to the fan. 3 Remove the two self-tapping screws securing the fan to the chassis. 4 Remove the fan from the chassis.
Formatter Assembly 1 Print a Configuration Page, if possible, to use as a reference when reinstalling the new formatter. 2 Remove any EIO accessories from the EIO slots. 3 Facing the back of the printer, loosen the two thumbscrews and slide the Formatter Assembly out. 4 Remove any DIMMs from the DIMM slots. Figure 6-31 Formatter Assembly Hint After reinstalling the formatter, update the printer configuration if necessary, comparing the configuration to the Configuration page printed in step 1.
Tray 1 Roller 1 Open the Top Cover and remove the Toner Cartridge. 2 Facing the front of the printer, raise the green center handle of the Registration Assembly. 3 Depress the locking tab on the right side roller cam, and slide the cam to the right. 4 Remove the D-Roller from the shaft. Cam Locking Tab Figure 6-32 Tray 1 Roller Hint To reassemble the roller, orient the D-Roller so that the thumb grip is on the left. Then, slide the Roller between the two cams.
Tray 2 Roller Figure 6-33 Hint 1 Remove the Paper Tray, and tilt the printer backwards, with the front of the printer facing up. 2 Depress the tab (A) on the right side cam, and slide the cam and the bushing to the right. 3 Rotate the D-Roller 180o and remove it from the shaft. Tray 2 Roller (bottom view of printer) Item Explanation A Tab is behind this cam. B Cam C Bushings To reassemble the roller, orient the pin on the D-Roller so that it lines up with the hole on the right side cam.
Paper Feed Roller Assembly Figure 6-34 EN 1 Remove the Top Cover (page 6-12), Left Side Cover (page 6-23), Main Gear Assembly (page 6-34), Paper Handling PCA (page 6-31), and Pickup Gear Assembly (page 6-36). 2 Remove the Paper Feed Roller Clutch (C) located on the left side of the Paper Feed Roller Assembly, below the Registration Assembly Clutch. Remove the E-Clip on the clutch, and slide the clutch off the shaft.
3 Figure 6-35 Remove the two machine screws in the center of the printer, under the Registration Assembly Roller Guide. See Figure 6-35. Location of two “common” screws (inside printer) Item Explanation A Screws 4 Remove the paper tray, and tilt the printer back, with the front facing up. 5 Remove the five self-tapping screws that hold the Paper Feed Roller Assembly to the chassis. They are located on the bottom of the printer. See Figure 6-36.
Figure 6-36 Paper Feed Roller Assembly (bottom view of printer) Item Explanation A Screws 6 EN Remove the Paper Feed Roller Assembly from the chassis, while feeding the cable back through the hole in the chassis.
DC Controller Board and Power Supply This assembly contains two PCAs. One houses the DC Controller and the High-Voltage Power Supply, and the other contains the LowVoltage Power Supply. 1 Remove the Top Cover (page 6-12), Left and Right Side Covers (page 6-23), and the Formatter Assembly (page 6-40). 2 Disconnect four cables on the right side of the chassis. (The fourth may have been disconnected during fan removal (page 6-39) already.
Figure 6-37 EN DC Controller Assembly (rear view of printer) Item Explanation A Machine Screws B Self-tapping Screws C Lock Washer/Grounding Wire Removing Assemblies 6-47
Figure 6-38 DC Controller Assembly (long screws) Item Explanation A Long Screws 5 Remove the two screws (A) (Figure 6-38) located at the back of the DC Controller Assembly, inside the chassis. These are long screws; their position requires the use of a magnetized screwdriver. 6 Facing the rear of the printer, remove the two spring-loaded machine screws closest to the ground wire removed in step 4 above. Remove the spring-loaded machine screw closest to you on the right side.
8 Figure 6-39 Hint EN The boards are linked by a ribbon cable and held onto the tray with four screws each. Carefully remove the ribbon cable that connects them, and loosen the screws on the board you wish to remove. DC Controller Assembly Item Explanation A Power Supply PCA B Ribbon Cable C DC Controller PCA To prevent damage to the high voltage contacts, the Paper Feed Belt Assembly needs to be installed before the DC Controller is reinstalled.
Paper Feed Belt Assembly 1 Remove the Top Cover (page 6-12), Left Cover (page 6-23), and Main Gear Assembly (page 6-34), DC Controller (page 6-46), and Transfer Roller Assembly (page 6-28). 2 Facing the front of the printer, remove the machine screws on each side of the Belt Assembly. 3 Raise the Registration Assembly by the small green handle, and lift out the Belt Assembly. 4 Remove the plastic guide (A) in Figure 6-41 and replace the belts if necessary.
Figure 6-41 Note EN Paper Feed Belt Assembly (removed) Item Explanation A Location where guide snaps out with two tabs on bottom B This edge has a metal ridge with sharp teeth. Use Caution. To prevent damage to the high voltage contacts, the Feed Belt Assembly MUST be reinstalled prior to the installation of the DC Controller.
Tray 1 Shaft Figure 6-42 1 Remove the Top Cover (page 6-12), Left and Right Side Covers (page 6-23), Pickup Gear Assembly (page 6-36), and Paper Handling PCA (page 6-31). 2 Raise the green center handle of the Registration Assembly. 3 Remove the plastic collar on the right, outside the chassis, by pulling outward on the collar’s release tab and sliding the collar off the shaft.
Hint EN 5 Release the tabs of the gear on the left side of the shaft, outside the chassis, and slide the gear off. 6 Slide the shaft to the right, and then angle it out of the chassis. Item Explanation A Tray 1 Shaft Gear B Tray 1 Release Tabs Make sure that the Tray 1 Lift Plate (with spring) is pressed down before installing the Tray 1 Shaft. The Shaft captivates the Tray 1 Lift Plate, and must be installed on top of it.
Tray 2 Shaft Figure 6-43 1 Remove the Top Cover (page 6-12), Left and Right Side Covers (page 6-23), Pickup Gear Assembly (page 6-36), and Paper Handling PCA (page 6-31). 2 Remove the spring from the gear on the left side of the shaft. 3 Align the solenoid arm (B) (see Figure 6-43) with the gap in the gear (on the left side of the printer). 4 Press the release tabs (A) outward, and slide the gear off the shaft.
Reassembly Steps: Figure 6-44 EN 1 Tip the printer back, so that the front faces up. 2 Insert the shaft into the fitting on the right side. Then, angle the shaft into the other side. 3 Place the bushing on the right end of the shaft, and push until the tab locks in the indentation in the shaft. 4 Facing the left side of the printer, orient the shaft so that the open end points away from the solenoid. See Figure 6-44. 5 Depress the solenoid arm, and slide the gear into place.
Tray 1 Lift Plate Figure 6-45 1 Remove the Front Cover (page 6-18), Tray 1 Shaft (page 6-52), Top Cover (page 6-12), Left and Right Side Covers (page 6-23). 2 Rotate the Tray 1 Lift Plate until the opening of the hook faces up. Then, press down on each hook until it slips off the shaft on which it is mounted. When you remove the Lift Plate, be careful not to lose the spring, as it is not captive.
Tray 1 Separation Pad Figure 6-46 EN 1 Rotate the Separation Pad 90o toward you, so that it is oriented up. 2 Lift the assembly out of the slots. Be sure not to lose the spring, which is not captive.
Paper Guide Figure 6-47 1 Lift the green handle in the middle of the Registration Assembly. 2 Release the Guide by freeing the end pins and the clips in the middle, then lift the Paper Guide out.
Paper Path Detect Sensor Figure 6-48 EN 1 Remove the Paper Tray. Remove the Top Cover (page 6-12), Left Side Cover (page 6-23), Pickup Gear Assembly (page 6-36), and Paper Handling PCA (page 6-31). 2 Remove the two screws securing the Sensor to the chassis. 3 Remove the Sensor, feeding the cable through the opening in the chassis.
Face Down Bin Full Sensor Figure 6-49 1 Remove the Top Cover (page 6-12), Rear Door/Rear Output Bin (page 6-10), and Left and Right Side Covers (page 6-23). 2 The Face Down Bin Full Sensor is located on the top of the Upper Delivery Assembly. Release the two clips (A) (Figure 6-50), and slide the Sensor to the right to remove it.
Figure 6-50 EN Detail of Bin Full Sensor Item Explanation A Clips Removing Assemblies 6-61
Power Connection Figure 6-51 1 Remove the Top Cover (page 6-12), Left Side Cover (page 6-23), and Rear Door / Rear Output Bin (page 6-10). 2 Disconnect the two cables from the Power Connection. 3 Remove the two self-tapping screws. 4 Remove the Power Connection.
Registration Assembly Figure 6-52 EN 1 Remove the Top Cover (page 6-12), Left Side Cover (page 6-23), Pickup Gear Assembly (page 6-36), and the Main Gear Assembly (page 6-34). 2 Release the E-ring on the Registration Assembly Clutch, and remove the Clutch (Figure 6-34 on page 6-43). 3 Remove the two “common” machine screws in the top middle of the printer. (These screws are already removed if you have removed the Paper Feed Roller Assembly.
Figure 6-53 Hint Registration Assembly Clutch Item Explanation A Flat B Alignment Tab C Stabilizer When reinstalling the clutch, orient the shaft with the flat spot up. When the clutch slides on, the slotted metal alignment tab will seat onto a plastic stabilizer. Make sure that the cable is situated away from the Registration Assembly before you reinstall the Assembly.
Upper Delivery Assembly 1 Figure 6-54 Upper Delivery Assembly (rear left view of printer) Item Explanation A Upper Delivery Assembly B Delivery Roller 2 EN Remove the Top Cover (page 6-12), Rear Door/Rear Output Bin (page 6-10), and Left and Right Side Covers (page 6-23), Main Gear Assembly (page 6-34),. Face the left side of the printer. The Delivery Assembly is secured with tabs on each side. Use a screwdriver to gently release the tab on the inside, and then lift the assembly out.
Figure 6-55 Upper Delivery Assembly Tabs 3 Hint The Face Down Bin Full Sensor is on the left side of the Upper Delivery Assembly (page 6-60). Be careful not to damage it as you slide the Delivery Assembly out of the chassis. To reassemble the Upper Delivery Assembly, slide the unit straight down to lock it in place. Make sure the Face Down Bin Full Sensor is free to move on the left side.
Delivery Roller Removal 1 Figure 6-56 EN Remove the Top Cover (page 6-12) the Left and Right Side Covers (page 6-23), Rear door/Rear Output Bin (page 6-10), Main Gear Assembly (page 6-34), and the Upper Delivery Assembly (page 6-65).
Figure 6-57 Hint Right Delivery Roller Tab 5 The Lower Delivery Rollers may fall out. When you replace them, make sure they align with the indentations in the chassis. 6 Individual Rollers, located above the Lower Delivery Rollers, may be removed by using a flat-blade screwdriver to push gently on the top side of the Roller. The Roller will be released by the action of the spring. When reinstalling the roller, re-align the Lower Delivery Rollers after you reinstall the Delivery Roller.
Laser Scanner Assembly Figure 6-58 EN 1 Remove the Top Cover (page 6-12) and the Face Down Assembly Base (page 6-21). 2 Facing the back of the printer, remove the four black screws holding the assembly to the chassis. 3 Disconnect the cables B, C, and D on each side of the assembly. 4 Remove the protective plastic and disconnect the 4-pin connector on the back of the Laser Scanner Assembly. 5 Lift the Laser Scanner Assembly out of the chassis.
Main Motor Figure 6-59 1 Remove the Main Gear Assembly (page 6-34). 2 Remove the three screws securing the motor to the back of the Main Gear Assembly. 3 Carefully separate the motor from the Gear Assembly.
Toner Cartridge Guides Figure 6-60 Hint EN 1 Remove the Top Cover (page 6-12) and Left and Right Side Covers (page 6-23). 2 Release the “leading” tab (A) first. See Figure 6-60. 3 Rotate the Guide in the direction shown to unlock the remaining two tabs. 4 Slide the Guide out of the chassis Toner Cartridge Guide Item Explanation A Leading Tab B Tabs To reinstall the Guide, insert the two “non-leading” tabs (B) first. Twist counter-clockwise to lock.
Power Inlet Assembly Figure 6-61 1 Remove the Top Cover (page 6-12) and the Right Side Cover (page 6-23). 2 Remove the Switch Rod by flexing it slightly and unhooking it from the switches on each end. 3 Remove the three self-tapping screws (B) from the Power Inlet housing. 4 Remove the machine screw (A) and grounding wire.
Optional 500-sheet Tray Disassembly Figure 6-62 EN 1 Using a flathead screwdriver, release the locking tabs by pressing down in the locking tab location slots. 2 Remove the right and left auxiliary covers, and the front cover.
Figure 6-63 500-sheet Tray (top view with covers removed) A 3 Self-tapping screws Remove the nine self-tapping screws.
Tray Indicator Assembly Figure 6-64 EN 1 Remove the left front corner cover screw. 2 Remove the cover. 3 Remove the Tray Indicator Assembly.
Left Front Corner Cover Installation 1 Install the Tray Indicator Assembly. 2 Depress the indicator to ensure the Tray Indicator Limit Tab is between the upper and lower limit stops. Note Ensure that the Tray Indicator operates correctly.
Paper Size Spring Assembly Figure 6-66 1 Remove the Paper Size Spring Assembly by disengaging the locking tabs from the left frame assembly. 2 Lift straight up to separate the internal component assembly from the frame assembly.
D-Roller and Feed Roller Feed Roller Removal 1 Pinch the Feed Roller Tab and slide it off of the shaft. D-Roller Removal Figure 6-67 1 Disengage the Spring (B). 2 Remove the Pickup Roller Shaft from the Retaining Clips. 3 Depress the Locking Tab on the D-Rollers and remove it from the shaft.
Gear Assembly and PCA Figure 6-68 EN 1 Remove the Gear Assembly by removing the six small selftapping screws. 2 Remove the 500-sheet Feeder PCA by removing the two machine screws (C). 3 Remove the Paper Size Switch PCA by removing the two machine screws.
Power Connector 1 Figure 6-69 Remove the Power Connector by removing the two screws (A).
Separation Roller Figure 6-70 EN 1 Lift the Return Cover. 2 Pinch the Separation Roller Tab. 3 Slide the Separation Roller off of the shaft and remove.
6-82 Removing and Replacing Parts EN
7 Troubleshooting Overview This chapter discusses the following: EN ● Troubleshooting Process ● Troubleshooting the Printing System ● General Troubleshooting Information ● Reference Diagrams Overview 7-1
Troubleshooting Process The troubleshooting process is a systematic approach that addresses the major problems first, then other problems as you identify the causes for printer malfunctions and errors. The Troubleshooting Process Flow on page 7-4 illustrates the major steps for troubleshooting the printing system. Each heading depicts a major troubleshooting step. A YES answer to the questions allows you to proceed to the next major step. A NO answer indicates that additional testing is needed.
Table 7-1. Major Steps for Troubleshooting (continued) Image Quality (page 7-48) Does the print quality meet the customer’s expectations? This section gives Toner Cartridge checks, information on EconoMode, image defect examples, and the repetitive defect ruler. Interface Troubleshooting (page 7-76) Can the customer print from the host system successfully? This section describes how to determine if the printer is communicating properly with the host system.
Troubleshooting Process Flow 7-4 Troubleshooting EN
EN Troubleshooting Process 7-5
Troubleshooting the Printing System Preliminary Operating Checks Prior to troubleshooting a specific printer problem, you should ensure that: Note ● The printer is being maintained on a regular basis as described in Chapter 4. ● The customer is using acceptable paper as specified in the HP LaserJet Printer Family Paper Specifications Guide. ● The printer is positioned on a solid, level surface.
Power On It is important to have the printer’s Control Panel functional as soon as possible in the troubleshooting process so that the printer’s diagnostics can assist in locating printing errors. Table 7-2. Power on Defect or Blank Display Problem Action Is the power cord plugged into the wall and the printer? Is AC and DC power available? Verify. See table 7-3, “No AC Power,” on page 7-8 and table 7-4, “No DC Power,” on page 7-9. Is the power switch set to on? Set the switch to the on position.
Table 7-3. No AC Power Cause Action No correct voltage present at the outlet. Plug the power cord into another AC circuit outlet. Inform the customer that the correct line voltage is not available at the outlet. The power cord is not firmly plugged into the printer and the outlet. Insert the power plug firmly. Blown fuse. 1. Check the fuse (F1) on the Power Supply. 2. Replace the fuses if necessary. Defective power switch. Remove the DC Controller Assembly.
Table 7-4. No DC Power Cause Action No AC power is supplied. Check the AC power supply. See table 7-3, “No AC Power,” on page 7-8 The overcurrent/overvoltage detection circuit activated. If the problem is not rectified after the power switch is turned off and on again, find the cause of activation of the overcurrent/ overvoltage detection circuit in the power supply. Wait for more than two minutes before turning the printer back on. Blown fuse. 1. Check the fuses (F2) on the Power Supply. 2.
Engine Test Button Location The engine test verifies that the print engine is functioning correctly. The Formatter PCA is completely bypassed during an engine test. This test is very useful for isolating printer problems. The engine test prints a full page of lines across the entire printable area, and is also useful for checking and adjusting registration. Note Engine test will print from the last input tray used.
Display The Control Panel should display READY, OFFLINE, or POWERSAVE ON. For information about errors displayed, access the Event Log. If the display is blank, see “Preliminary Operating Checks” on page 7-6.
Event Log Use the Event Log to diagnose and troubleshoot printer errors and intermittent failures. You can either display or print the Event Log. Access the Event log from the Control Panel’s Information Menu. (Select PRINT EVENT LOG or SHOW EVENT LOG.) The Event Log retains the printer’s last 30 error messages. See the tables starting on page 7-16 for more information about correcting Event Log messages on the printer.
Figure 7-2 EN Event Log Page Troubleshooting the Printing System 7-13
Display the Event Log If the printer cannot print or move any paper, follow these steps to display the Event Log. 1 Press [Menu] until INFORMATION MENU appears. 2 Press [Item] until SHOW EVENT LOG appears. 3 Press [Select] to show the Event Log. 4 Press [+] to scroll through the Event Log. 5 Write down the error messages. 6 Check the Event Log for specific error trends in the last 10,000 printed pages. 7 Ask the customer for any observed error trends.
The Event Log may record errors in a different format than the Control Panel Display. For example, should a 50.1 FUSER ERROR / CYCLE POWER be displayed on the Control Panel, the Event Log will record a 50.02.01 error, with the 02 signifying that 2 sensors were blocked. Likewise, when a 13.1 through 13.9 are displayed on the Control Panel, the Event Log will record a 13.0x.01 through 13.0x.09, where x= the number of sensors blocked in the printer. Hint Whenever a 13.
Printer Messages The following table explains messages that might display on the printer’s Control Panel. Alphabetical printer messages and their meanings are listed in Table 7-5, and numerical printer messages are listed in Table 7-6. Hint If the message persists requesting that you load a tray, or if a message indicates that a previous print job is still in the printer’s memory, press [GO] to print or press [Cancel Job] to clear the job from the printer’s memory.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action BAD OPT TRAY CONNECTION The optional tray is not connected properly. CANNOT DUPLEX REAR BIN OPEN The printer cannot duplex Close the rear output bin. because the rear output bin is open. CHECK INPUT DEVICE The optional input tray cannot feed paper to the printer because a door or tray is open. 1. Check the doors and trays. 2.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action DISK FILE OPERATION FAILED The requested operation could not be performed. You might have attempted an illegal operation, such as trying to download a file to a non-existent directory. 1. Check the filename and directory name. 2. Retry the task. DISK FILE SYSTEM IS FULL The disk is full. 1. Delete files from the EIO disk and then try again, or add a flash DIMM. 2.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action FLASH FILE SYSTEM IS FULL The flash DIMM is full. 1. Delete files from the Flash DIMM or add another DIMM. 2., Download or delete files from HP JetAdmin, and download or delete fonts from HP FontSmart. (See the software help for more information.) FLASH IS WRITE PROTECTED The flash DIMM is protected, and no new files can be written to it.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action INSTALL TRAY x The printer is unable to print the current job because the specified tray (x) is open or not inserted correctly. LOADING PROGRAM Wait for the program to Programs and fonts can be stored on the printer’s load. file system. At bootup time these entities are loaded into RAM.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action MEMORY FULL STORED DATA LOST There is no available memory in the printer. The current job might not print correctly and some resources (such as downloaded fonts or macros) might have been deleted. The customer might want to add more memory to the printer, or simplify the print job.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action PERFORM PRINTER MAINTENANCE To ensure optimum print quality, the printer prompts the customer to have routine maintenance performed every 150,000 pages. Install the Printer Maintenance Kit. Be sure to reset the Maintenance Page Count when you install the PM Kit. See page 3-34 for information on resetting the Maintenance Page Count.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action RAM DISK IS WRITE PROTECTED The RAM disk is protected, and no new files can be written to it. Disable the write protection through HP JetAdmin. TRAY x EMPTY The specified tray is empty, but the current job does not need this tray in order to print correctly. If this message appears and the tray contains paper, a sensor could be damaged. PS301 detects paper in Tray 2.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action TRAY x LOAD [TYPE] [SIZE] One of the following occurred: There is no paper loaded in the specified tray, or the paper is not the size requested, or the Control Panel is not set for the size of paper loaded. The tray is not properly adjusted for size. The default paper size is set incorrectly.
Table 7-5. Alphabetical Printer Messages (continued) Control Panel Message Event Log Explanation Message Recommended Action USE [TYPE] [SIZE] INSTEAD? If the requested paper size or type is not available, the printer asks if it should use another paper size or type instead. WAIT FOR PRINTER TO REINITIALIZE The RAM disk setting has Wait for the printer to reinitialize. been changed from the printer’s Control Panel. This change will not take effect until the printer reinitializes. EN 1.
Table 7-6. Numerical Printer Messages Control Panel Message Event Log Message Explanation Recommended Action 13.x PAPER JAM [LOCATION] 13.xx Paper is jammed at the specified location (and possibly at other locations). If the message persists after all jams have been cleared, a sensor might be stuck or broken. For all paper jam messages, do the following: 1. Remove jammed paper from the specified location. Check the entire paper path for other pieces of paper in the path. 2.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message Event Log Message Explanation Recommended Action 13.5 PAPER JAM 13.05 Paper delay jam at Fuser. 13.6 PAPER JAM 13.06 Paper stopped jam at Fuser. For 13.5 and 13.6: 1. Check the Transfer Roller and Small Media Belt to ensure they are operating and can feed paper. 2. Check the paper path for obstructions at the Transfer Roller and Toner Cartridge, at the Paper Feed Guide, and at the Fuser. 3. Check PS1307 for proper operation.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message Event Log Message Explanation Recommended Action 13.20 PAPER JAM 13.20 or 13.32 Paper stopped jam in the paper path. 13.21 PAPER JAM 13.21 or 13.33 Door open jam. For 13.20 and 13.21: 1. Check the entire paper path for obstructions such as paper in the path, registration area, transfer area, paper feed, and Fuser. 2. Check that all assemblies are seated and doors are closed. 3.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message 22 EIO x BUFFER OVERFLOW alternates with PRESS GO TO CONTINUE 22 PARALLEL I/O BUFFER OVERFLOW alternates with PRESS GO TO CONTINUE 22 SERIAL I/O BUFFER OVERFLOW alternates with PRESS GO TO CONTINUE EN Event Log Message Explanation Recommended Action Too much data was sent to Press [Go] to clear the the EIO card in the message. (Data will be lost.) specified slot (x). Too much data was sent to the parallel port.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message 40 BAD SERIAL TRANSMISSION alternates with PRESS GO TO CONTINUE 40 EIO x BAD TRANSMISSION alternates with PRESS GO TO CONTINUE 7-30 Troubleshooting Event Log Message Explanation Recommended Action The printer encountered an error while transferring data from the computer. The error might have occurred for several reasons: The computer was powered on or off while the printer was online.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message Explanation Recommended Action 41.3 UNEXPECTED PAPER SIZE The paper size you are trying to print is not the same as the settings for the tray. 1. Make sure that all trays are correctly adjusted for size.The size displayed on the front of the paper tray must match the size of paper loaded in the tray. (The printer will continue trying to print the job until size settings are correct.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message Event Log Message 50.x FUSER ERROR Figure 7-3 Explanation Recommended Action A Fuser error has occurred. X Description 1 Low Fuser temperature. 2 Fuser warm up service. 3 High Fuser temperature. 4 Faulty Fuser. 5 Inconsistent Fuser. 1. Turn the printer off for a minimum of 20 minutes to clear the error. 2. Reseat the Fuser. 3. Turn the power off and remove the Fuser. Check continuity between connectors J1307-1 and J1307-2.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message Explanation Recommended Action 51.x PRINTER ERROR A loss of beam detect occurred. X Description 1 Beam detect error. 2 Laser error. 1. Press [Go]. The page containing the error will automatically be reprinted. 2. Turn the printer off and then on. 3. Reseat the cables. 4. Replace the Laser Scanner. 52.x PRINTER ERROR The Laser Scanner speed is incorrect. X Description 1 Scanner start-up error. 2 Scanner rotation error. 1.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message 53.xy.zz PRINTER ERROR Event Log Message Explanation Recommended Action There is a memory error with an accessory. The DIMM that caused the error will not be used. Values of x, y, and zz are as follows: x=DIMM type 0=ROM 1=RAM 1. Turn the printer off, and reseat or replace the specified DIMM. 2. Try the DIMM in another slot. 3. Replace the DIMM that caused the error.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message 55 PRINTER ERROR alternates with PRESS GO TO CONTINUE 56.x PRINTER ERROR Event Log Message Explanation Recommended Action An internal communication 1. Press [Go]. The page error occurred. containing the error will automatically be reprinted. 2. Check power at the site. 3. Replace the Formatter PCA. 4. Replace the DC Controller. A temporary printing error occurred. X Description 1 Illegal input. 2 Illegal output. 1. Press [Go].
Table 7-6. Numerical Printer Messages (continued) Control Panel Message Event Log Message Explanation Recommended Action 62.x PRINTER ERROR There is a problem with the Reseat or replace the specified DIMM. printer’s memory. The x value refers to the location of the problem: 0 = Internal memory 1 to 3 = DIMM slots 1, 2, or 3 64.x PRINTER ERROR A scan buffer error occurred. 1. Turn the printer off, then turn the printer on. 2. Replace Formatter PCA. 66.xx.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message Explanation Recommended Action 68 NVRAM FULL CHECK SETTINGS An error occurred in the printer’s nonvolatile memory (NVRAM) and one or more printer settings has been reset to its factory default. 1. Print a Configuration Page and check the printer settings to determine which values have changed. 2. Hold down [Cancel Job] while turning the printer on. This will clean up the NVRAM by removing old areas that are not being used. 69.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message 79.xxxx PRINTER ERROR Event Log Message Explanation Recommended Action The printer detected an error. The numbers (xxxx) indicate the specific type of error. 1. Turn the printer off, and then turn the printer on. 2. Try printing a job from a different software application. If the job prints, go back to the first application and try printing a different file.
Table 7-6. Numerical Printer Messages (continued) Control Panel Message 8x.yyyy EN Event Log Message Explanation Recommended Action The EIO accessory in slot x has encountered a critical error as specified by yyyy. X Description 1 EIO slot 1 - The printer detected an error with the EIO card. 2 EIO slot 2 - The printer detected an error with the EIO card. 6 EIO slot 1 - The EIO card detected an error. The EIO card may be defective. 7 EIO slot 2 - The EIO card detected an error.
General Paper Path Troubleshooting Paper jams occur in the printer when paper does not either reach or clear a photosensor along the printer’s paper path in a specific amount of time. If a paper jam occurs, a 13.xx PAPER JAM message is displayed on the printer’s Control Panel. The following table contains general questions you may ask and topics to explore prior to troubleshooting. See the 13.xx section in the Event Log for specific error codes. Table 7-7.
Table 7-7. General Paper Path Troubleshooting Questions (continued) Problem Action Is the customer loading the paper trays correctly? Observe the customer loading paper. Do not fan paper. Refer to proper paper handling procedures in the Paper Specification Guide. Is the customer overfilling the paper trays? Ensure paper is NOT over the maximum fill marks in the paper trays. Observe the customer loading paper in trays.
Paper Path Test To perform a Paper Path Test: 1 Press [Menu] until INFORMATION MENU appears 2 Press [Item] until PRINT PAPER PATH TEST appears. 3 Press [Select]. 4 Press [+] to cycle selections until the desired paper tray appears. 5 Press [Select]. 6 Press [+] until the desired output bin appears (open the rear output bin to print to it) 7 Press [Select]. 8 Press [+] until the desired duplex mode (on or off) appears. 9 Press [Select].
Information Pages From the printer’s control panel you can print pages that give details about the printer and its current configuration. The following information pages are described here: ● Menu Map ● Configuration Page ● PCL or PS Font List For a complete list of the printer’s information pages, print a Menu Map and see the Information Menu listed.
Figure 7-4 Menu Map 7-44 Troubleshooting EN
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. Note If an HP JetDirect print server EIO card is installed, a JetDirect Configuration Page will print out as well. To print a Configuration page: 1 Press [Menu] until INFORMATION MENU appears. 2 Press [Item] until PRINT CONFIGURATION appears.
Figure 7-5 Configuration Page 7-46 Troubleshooting EN
Verify installed options Under “Installed Personalities” on the Configuration page, look for options such as hard disk or DIMM types and sizes. Verify that the options which are installed in your printer are reflected in the Configuration Page. If an installed device is not shown, reseat the device and print a new Configuration Page.
Image Quality When you are working with customers, obtain a print sample before you begin troubleshooting their printer. Ask the customer to explain the quality they expect from the printer. The print sample will also help clarify the customer’s explanation. Table 7-8. Image Quality Checks Image Quality Checks Action Does the problem repeat on Use the Repetitive Defect Ruler on page 7-73.
Use the following list to ensure that the Toner Cartridge is still operable. Note ● Ensure that the Toner Cartridge has toner. Full Toner Cartridge weight = 1880 grams (66.3 oz.) Empty Weight = 1450 grams (51.1 oz.) ● Check the expiration date of the Toner Cartridge (stamped on the cartridge’s box). ● Check the Toner Cartridge to see if it has been disassembled or refilled. ● Ensure that the Toner Cartridge is seated properly in the printer cavity.
Image Defects The quality of the printer’s output is subject to the judgment of the user. This section of the manual helps you define print quality defects and understand what factors affect print quality. The print samples shown in the following figures illustrate some print quality defects. Keep copies of print quality defects encountered in the field with an explanation of their causes for future reference. The image defects listed below are covered in the following tables.
Table 7-9. Black Lines (perpendicular path) Possible Cause Action Defective Toner Cartridge. Inspect the Toner Cartridge for a scratched photosensitive drum or toner leaking through worn seals. Replace as necessary. Fusing Assembly is contaminated or damaged. Inspect the Fusing Assembly for toner build-up or scratches on the fuser rollers. Try cleaning with alcohol. Replace the Fusing Assembly if damaged. Static Eliminator teeth are contaminated or defective.
Table 7-10. Black Page (continued) Possible Cause Action Defective Toner Cartridge. Replace the Toner Cartridge. Light is leaking into the printer. Ensure all covers are in place. High voltage power supply circuit is defective (not supplying the correct negative voltage). Replace the High Voltage Power Supply PCA. Remove the DC Controller Board and check the The High Voltage connectors for damage. Reseat the DC Controller Power Supply is installed improperly.
Table 7-10. Black Page (continued) Possible Cause Action Defective Toner Cartridge. Replace the Toner Cartridge. Light is leaking into the printer. Ensure all covers are in place. Connectors between Inspect and reseat the connectors. Replace cables as necessary. the Laser/Scanner unit and DC Controller are not seated properly or are defective. Table 7-11. Blank Page Possible Cause Action Software Configuration.
Table 7-11. Blank Page (continued) Possible Cause Action Empty or defective Toner Cartridge. 1. If unsure, weigh the cartridge: • Full weight = 1880 grams (66.3 oz) • Empty weight = 1450 grams (51.5 oz) Note: Some toner may reside in the waste toner cavity, affecting the weight of the cartridge. 2. Perform the Half Self-Test Functional Check (page 7-74) or try a known good toner cartridge. Replace the Toner Cartridge if necessary. Laser/Scanner door not opening properly. 1.
Table 7-11. Blank Page (continued) Possible Cause Action DC Controller PCA is Replace the DC Controller PCA. defective. The DC Controller supplies the proper voltage to the High Voltage Power Supply PCA. No Developing Bias. 1. Clean the High Voltage Power Supply contacts. With no Developing Bias charge, toner is not attracted to the drum. 2. Replace the Engine Controller Board. No drum ground path. With no ground path the drum cannot discharge.
Table 7-12. Blank Spots (continued) Possible Cause Action Dirty or deformed Transfer Roller. Replace the Transfer Roller. See also “Dropouts” on page 7-60. Table 7-13. Character Voids Possible Cause Action User paper with correct finish (smoothness) meeting Paper surface too rough. Toner migrates HP specifications (see HP LaserJet Printer Family to low spots, leaving Paper Specifications Guide). higher areas void. Printing on wrong side Check for the arrow on the paper wrapper. Be sure of paper.
Table 7-13. Character Voids (continued) Possible Cause Action Bad Transfer Roller. If the Transfer Roller has finger oils on its surface, is dirty or worn out, this problem can result. Clean the Transfer Roller using a dry, lint-free cloth. DO NOT touch the Transfer Roller with your fingers. If the problem persists, replace the Transfer Roller Assembly. Table 7-14. Creases Possible Cause Action Paper does not meet printer specifications or is stored improperly. 1.
Table 7-15. Curl Possible Cause Action Paper does not meet printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself. 2. Turn over the stack of paper in the tray. Also try rotating the paper 180°. 3. Check the paper (or other print media) type and quality. Replace the paper, and advise the customer to use the recommended paper and store it properly.
Table 7-16. Dirt on Back Possible Cause Action Dirt inside printer (Tray Separation Roller, Feed Roller, Transfer Roller, Fuser, Toner Cartridge). 1. Print at least 10 pages to see if the problem goes away. 2. Print a cleaning page (page 4-4). Identify and clean the dirty part according to the “Repetitive Defect Ruler” on page 7-72. If dirt cannot be removed, replace the dirty part. 3. Check for toner leaks. Paper does not meet printer specifications or is stored improperly. 1.
Table 7-17. Distorted Image (continued) Possible Cause Action Poor connection of cables to the Laser Scanner. Reseat the cables connected to the Laser Scanner. Poor connection of cables to the DC Controller Assembly. Reseat the cables connected to the DC Controller Assembly. Defective Laser Scanner. Replace the Laser Scanner. Defective Engine Controller Board. Replace the Engine Controller Board. Table 7-18. Dropouts Possible Cause Action Paper might be too smooth.
Table 7-18. Dropouts (continued) Possible Cause Action Paper does not meet Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide). specifications. The paper moisture content, conductivity, or surface finish may not work correctly with the electrophotographic process. DC Controller Replace the DC Controller. defective (low primary voltage). High Voltage Power Replace the High Voltage Power Supply PCA. Supply PCA defective. Transfer Roller defective.
Table 7-19. Faded Print/Bubbles (continued) Possible Cause Action Turn EconoMode off. EconoMode is on. EconoMode saves toner by reducing the dot density. This may appear to be a print quality problem in some cases. Paper does not meet Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide). specifications. The moisture content, conductivity, or surface finish may not work correctly with the electrophotographic process.
Table 7-19. Faded Print/Bubbles (continued) Possible Cause Action High Voltage Power Supply PCA is defective. Replace the High Voltage Power Supply PCA. DC Controller PCA is Replace the DC Controller PCA. defective. The DC Controller supplies the proper voltage to the High Voltage Power Supply PCA. Table 7-20. Gray Background Possible Cause Action Paper does not meet printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself. 2.
Table 7-20. Gray Background (continued) Possible Cause Action Wrong toner density setting. From the Print Quality Menu on the Control Panel, adjust the toner density setting. Make sure EconoMode is off. Faulty Toner Cartridge. Replace the Toner Cartridge. See also “Light Print, Dark Print, or Fade” on page 765. Table 7-21. Horizontal Smudges Possible Cause Action Paper path contamination or damage. 1. Check the Toner Cartridge and replace it if necessary. 2.
Table 7-22. Horizontal White Lines Possible Cause Action Lack of toner or faulty Redistribute the toner in the Toner Cartridge. If the Toner Cartridge. problem continues, replace the Toner Cartridge. Dirt in the laser path. Clean the laser path. (Remove the Laser Scanner Assembly and clean the lens.) Defective Fuser. Replace the Fuser Assembly. Dirty mirror in the Laser Scanner. Replace the Laser Scanner. Table 7-23.
Table 7-23. Light Print, Dark Print, or Fade (continued) Possible Cause Action Poor contact to the Engine Controller Board. 1. Clean the contacts if they are dirty. If the problem remains after cleaning, or if parts are damaged or deformed, replace them. 2. Replace the Engine Controller Board if necessary. Defective Laser Scanner. Replace the Laser Scanner. Defective High Replace the High Voltage Power Supply PCA. Voltage Power Supply. See also “Faded Print/Bubbles” on page 7-61. Table 7-24.
Table 7-25. Repetitive Defects Possible Cause Action Inspect the drum for scratches or damage. Replace Toner Cartridge is the Toner Cartridge. damaged. The circumference of the photoconductive drum inside the toner cartridge is 94 mm (3.7 inches). If the defect repeats at this interval, the defect is associated with the drum. Dirty Rollers. Any dirty Examine and clean rollers in the paper path. roller in the paper path may result in a repetitive print defect. Clean the Fusing Assembly using alcohol.
Table 7-26. Skew Possible Cause Action Paper does not meet printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself. 2. Turn over the stack of paper in the tray. Also try rotating the paper 180°. 3. Check the paper (or other print media) type and quality. Replace the paper, and advise the customer to use the recommended paper and store it properly.
Table 7-27. Toner Smear (continued) Possible Cause Action Wrong Fuser setting for paper type. From the Paper Handling Menu on the Control Panel, change the Fuser Mode setting or choose another paper type from the printer driver. Replace the Fusing Assembly. Fusing Assembly is defective. The print will smear if the Fusing Assembly is not heated sufficiently to bond the toner image to the paper. The Static Eliminator is dirty or is not grounded, allowing a static charge to remain on the page.
Table 7-28. Toner Specks (continued) Possible Cause Action Paper does not meet printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself. 2. Turn over the stack of paper in the tray. Also try rotating the paper 180°. 3. Check the paper (or other print media) type and quality. Replace the paper, and advise the customer to use the recommended paper and store it properly.
Table 7-30. Vertical Dots Possible Cause Action Dirty static eliminator teeth. Clean the static eliminator. Poor contact between Clean the contacts, if dirty. If the problem remains the Static Eliminator after cleaning, or if parts are damaged or deformed, replace them. and the Engine Controller Board. Deformed or deteriorated Transfer Roller. Replace the Transfer Roller. Defective DC Controller Assembly. Replace the DC Controller Assembly. Table 7-31.
Repetitive Defect Ruler Repetitive print defects usually are associated with a specific roller within the printer or the Toner Cartridge. Use Figure 7-1 to isolate the cause of repetitive print defects. Align the first occurrence of the defect with the top of the “ruler” (at the top or bottom of the misprinted page), and measure to the next occurrence of the defect to determine the roller in question.
Figure 7-6 EN Repetitive Defect Ruler Troubleshooting the Printing System 7-73
Image System Troubleshooting Half Self-Test Functional Check The electrophotographic process can be subdivided into the following stages: ● Cleaning (removes excess toner from drum surface) ● Conditioning (places a uniform electrical charge on drum) ● Writing (laser strikes surface of drum to create latent image) ● Developing (forms the toner image on drum) ● Transferring (charges transfer the image to paper) ● Fusing (heat and pressure produces a permanent image) The purpose of the Half Self Te
Drum Rotation Functional Check The photosensitive drum, located in the Toner Cartridge, must rotate for the print process to work. The photosensitive drum receives its drive from the Main Drive assembly. To verify whether the drum is rotating: Note EN 1 Open the top cover. 2 Remove the Toner Cartridge. 3 Mark the cartridge’s drive gear with a felt-tipped marker. Note the position of the mark. 4 Install the Toner Cartridge and close the top cover.
Interface Troubleshooting This section provides an overview of the printer’s interface requirements. Communications Check Note Communication problems are normally the customer’s responsibility. Time spent attempting to resolve these problems may not be covered by the product’s Hewlett-Packard warranty. Refer the customer to the network administrator for assistance in troubleshooting network problems.
Network statistics I/O card status IP address Node name Figure 7-7 EN Novell status JetDirect Configuration Page Troubleshooting the Printing System 7-77
JetDirect Configuration ● If the EIO JetDirect Card has successfully powered up and completed its internal diagnostics, the I/O CARD READY message appears. If communication is lost, an I/O NOT READY message appears followed by a two digit error code. See the HP JetDirect Network Interface Configuration Guide for further details and recommended action. ● The “Network Statistics” column indicates that network activity has been occurring.
Reference Diagrams Locations of Components Figure 7-8 EN Paper Path Reference Diagrams 7-79
Figure 7-9 250-sheet Paper Feeder 7-80 Troubleshooting EN
Figure 7-10 EN 250-sheet Paper Feeder Reference Diagrams 7-81
Figure 7-11 Tray 2 Paper Path 7-82 Troubleshooting EN
Figure 7-12 EN 500-sheet Paper Feeder Reference Diagrams 7-83
Figure 7-13 500-sheet Paper Feeder 7-84 Troubleshooting EN
Figure 7-14 EN Duplexing Unit Reference Diagrams 7-85
Figure 7-15 Duplexing Unit 7-86 Troubleshooting EN
Figure 7-16 EN Duplexing Unit Reference Diagrams 7-87
Sensors and Signals The drawing below shows key components, sensors, and switches that control the operation of the printer. The table on page 7-90 shows the name of each sensor, as well as the signal name and its destination or source.
Figure 7-18 EN Paper Path (dashed lines represent duplexer path) Reference Diagrams 7-89
Table 7-32.
Table 7-32.
Figure 7-19 Location of Sensors and Switches 7-92 Troubleshooting EN
Reversing unit paper sensor Side registration guide home position sensor Deflector drive solenoid Refeed paper sensor Figure 7-20 EN Duplexer Sensors and Switches Reference Diagrams 7-93
Figure 7-21 Motors 7-94 Troubleshooting EN
Figure 7-22 EN Motors (Duplexing unit) Reference Diagrams 7-95
Figure 7-23 Connectors 7-96 Troubleshooting EN
Figure 7-24 EN Connectors (Duplexing Unit and 250-sheet Paper Feeder) Reference Diagrams 7-97
Figure 7-25 PCA’s 7-98 Troubleshooting EN
Figure 7-26 EN PCA (Duplexing Unit) Reference Diagrams 7-99
Figure 7-27 Clutches and Solenoids 7-100 Troubleshooting EN
Figure 7-28 EN Clutches and Solenoids (Duplexing Unit) Reference Diagrams 7-101
Figure 7-29 Switches 7-102 Troubleshooting EN
Figure 7-30 EN Switches (500-sheet Paper Feeder) Reference Diagrams 7-103
Figure 7-31 DC Controller Board Test Points and Switches 7-104 Troubleshooting EN
Figure 7-32 EN 250-sheet Paper Feeder Sensors Reference Diagrams 7-105
7-106 Troubleshooting EN
DC Controller PCA Inputs and Outputs Figure 7-33 EN DC Controller PCA I/O (1 of 4) Reference Diagrams 7-107
Figure 7-34 DC Controller PCA I/O (2 of 4) 7-108 Troubleshooting EN
Figure 7-35 EN DC Controller PCA I/O (3 of 4) Reference Diagrams 7-109
Figure 7-36 DC Controller PCA I/O (4 of 4) 7-110 Troubleshooting EN
8 Parts and Diagrams Overview The figures in this chapter identify and locate the printer’s major subassemblies and replacement parts.
How To Use the Parts Lists and Diagrams The figures in this chapter illustrate the major subassemblies in the printer and their component parts. A table accompanies each exploded view diagram. Each table lists the item number for the replaceable part, the associated part number for the item, the quantity, and a description of the part.
Contact your local HP Parts Coordinator for other local phone numbers. Note EN Parts that have no item number or part number listed are not field replacement parts and cannot be ordered.
Accessories and Supplies The following items are available through your local authorized HP dealer. To find a dealer near you, call the HP Customer Information Center (800) 752-0900. Note See page 2-4 for documentation product numbers. Table 8-1. Accessories and Supplies Description Part No. Exchange No. Product No.
Table 8-1. Accessories and Supplies (continued) Description Part No. Exchange No. Product No.
Common Hardware and Replacement Cables Table 8-2. Screws Used in the Printer Description Part No.
Illustrations and Parts Lists Upper Delivery Roller Assembly Paper Feed Belt Assembly Paper Feed Roller Assembly DC Controller Assembly Printer Drive Assembly EN Pickup Drive Assembly Illustrations and Parts Lists 8-7
Registration Roller Assembly Fuser Toner Cartridge Paper Pickup Roller Assembly Figure 8-1 Paper Tray Assembly Location Diagram Table 8-4. Assemblies Listed Alphabetically and Their Part Numbers Description Part No. Exchange No.
Table 8-4. Assemblies Listed Alphabetically and Their Part Numbers (continued) Description Part No. Paper Feed Roller Assembly RG5-3522-000CN Figure 8-11 Paper Feed Belt RG5-3526-000CN Figure 8-10 Registration Roller Assembly RG5-3524-000CN Figure 8-12 EN Exchange No.
7 5 A B E D G 1 F C H 8 B C I 3 A 2 6 6 9 4 10 Figure 8-2 External Covers and Panels Table 8-5. External Covers and Panels Item No. Part No.
Table 8-5. External Covers and Panels (continued) Item No. Part No.
2 4 5 1 3 Figure 8-3 Upper Cover Assembly Table 8-6. Top Cover Assembly Item No. Part No.
Table 8-6. Top Cover Assembly (continued) Item No. Part No.
20 18 1 10 11 3 12 9 6 7 13 8 2 19 26 17 5 22 15 4 Screws: M4x10, Tapping, Pan Head unless otherwise indicated 23 21 24 16 14 25 Figure 8-4 Internal Components (1 of 4) Cables are listed in Table 8-3 on page 8-6. Table 8-7. Internal Components (1 of 4) Item No. Part No.
Table 8-7. Internal Components (1 of 4) (continued) Item No. Part No.
22 17 24 9 8 20 18 19 23 25 7 24 13 12 12 13 21 10 15 16 1 14 11 2 3 1 6 5 4 Screws M4x10, Tapping, Pan Head unless otherwise noted Figure 8-5 Internal Components (2 of 4) 8-16 Parts and Diagrams EN
Table 8-8. Internal Components (2 of 4) Item No. Part No.
1 5 10 3 6 9 4 2 8 7 Figure 8-6 Internal Components (3 of 4) 8-18 Parts and Diagrams EN
Table 8-9. Internal Components (3 of 4) Item No. Part No.
5 3 1 4 Figure 8-7 2 Internal Components (4 of 4) 8-20 Parts and Diagrams EN
Table 8-10. Internal Components (4 of 4) Item No. Part No.
2 3 7 8 5 6 4 1 Figure 8-8 Upper Delivery Assembly Table 8-11. Upper Delivery Assembly Item No. Part No.
1 7 3 8 4 2 5 9 6 Figure 8-9 Tray 2 Paper Pickup Roller Assembly Table 8-12. Tray 2 Paper Pickup Roller Assembly Item No. Part No.
6 2 3 5 4 7 8 12 11 9 10 1 Figure 8-10 Paper Feed Belt Assembly 8-24 Parts and Diagrams EN
Table 8-13. Paper Feed Belt Assembly Item No. Part No.
2 4 3 5 1 Figure 8-11 Paper Feed Assembly 8-26 Parts and Diagrams EN
Table 8-14. Paper Feed Assembly Item No. Part No.
1 Figure 8-12 Registration Roller Assembly 8-28 Parts and Diagrams EN
Table 8-15. Registration Roller Assembly Item No. Part No.
2 4 3 5 1 Figure 8-13 250-sheet Tray 8-30 Parts and Diagrams EN
Table 8-16. 250-sheet Tray Item No. Part No.
3 4 2 1 Figure 8-14 Main Drive Assembly 8-32 Parts and Diagrams EN
Table 8-17. Main Drive Assembly Item No. Part No.
3 2 1 Figure 8-15 Pickup Drive Assembly Table 8-18. Pickup Drive Assembly Item No. Part No.
3 2 1 Figure 8-16 PCA Assembly Locations Table 8-19. PCA Assembly Locations Item No. Part No.
1 2 3 Figure 8-17 Printer Controller Assembly Table 8-20. Printer Controller Assembly Item No. Part No.
1 Figure 8-18 Fuser Table 8-21. Fuser Item No. Part No.
2 4 3 10 8 13 9 5 1 11 7 11 6 12 Figure 8-19 12 500-sheet Feeder 8-38 Parts and Diagrams EN
Table 8-22. 500-sheet Feeder Item No. Part No. Quantity Description 1 RB2-3211-000CN 1 Right Mount 2 RB2-3235-000CN 1 Front Cover 3 RB2-3236-000CN 1 Right Auxiliary Cover 4 RB2-3237-000CN 1 Left Auxiliary Cover 5 RB2-3238-000CN 1 Right Cover 6 RB2-3239-000CN 1 Left Cover 7 RB2-3284-000CN 1 Leaf Spring 8 RB2-3213-000CN 1 Inner Cover 9 RB2-3286-000CN 1 Leaf Spring 10 RG5-4180-000CN 1 Left Frame Assembly 11 XB1-2300-407CN 1 Screw, Mach.
1 2 3 4 9 8 5 7 6 Figure 8-20 500-sheet Feeder 8-40 Parts and Diagrams EN
Table 8-23. 500-sheet Feeder Item No. Part No.
Alphabetical Parts List Description Part Number Table Number and Page 250-sheet Universal Paper Tray C4116A Table 8-16 on page 8-31 Cable (Fuser AC) RG5-3561-000CN Table 8-10 on page 8-21 Cable (Scanner) RG5-3562-000CN Table 8-10 on page 8-21 Cable, Display, Accessory Power, Photo Sensor RG5-3557-000CN Figure 8-4 on page 8-14 Cable, Paper Sensor RG5-3554-000CN Figure 8-4 on page 8-14 Cable, Paper Sensor RG5-3558-000CN Figure 8-4 on page 8-14 Cable, Ribbon, from Paper PCA to Controller
Description Part Number Table Number and Page Feeder Controller PCA Assembly, 500-sheet Feeder RG5-4211-000CN Table 8-23 on page 8-41 Flat Cable RH2-5337-000CN Table 8-20 on page 8-36 Formatter Assembly C3974-69001 Front Cover, 500-sheet Feeder RB2-3235-000CN Front Cover Assembly RG5-3549-000CN Table 8-5 on page 8-10 Front Cover Pin RB2-1745-000CN Table 8-5 on page 8-10 Front Inner Cover Assembly RG5-3547-000CN Table 8-5 on page 8-10 Fuser (100 - 120 V) RG5-3528-000CN Table 8-21 on p
Description Part Number Table Number and Page Lower Delivery Roller Spring RB1-6252-000CN Table 8-9 on page 8-19 Lower Delivery Shaft Gear RS6-0357-000CN Table 8-7 on page 8-14 M3x6 Screw, Mach.
Description Part Number Table Number and Page Rear Door Sensor Assembly RG5-3553-000CN Table 8-7 on page 8-14 Registration Roller Assembly RG5-3524-000CN Table 8-15 on page 8-29 Return Cover, 500-sheet Feeder RB2-3262-000CN Figure 6-70 on page 6-81 Right Auxiliary Cover, 500-sheet Feeder RB2-3236-000CN Table 8-22 on page 8-39 Right Bushing RB2-1986-000CN Table 8-11 on page 8-22 Right Bushing Lower Delivery Roller RB2-1988-000CN Table 8-7 on page 8-14 Right Corner Cover RB2-1755-000CN
Description Part Number Table Number and Page Static Charge Eliminator RB2-1981-000CN Table 8-11 on page 8-22 Switch Rod RB2-1731-000CN Table 8-8 on page 8-17 Tension Spring, 500-sheet Feeder RF5-2632-000CN Table 8-23 on page 8-41 Toner Cartridge Door Assembly RG5-3556-000CN Table 8-6 on page 8-12 Toner Cartridge Engagement Arm RB2-1856-000CN Table 8-17 on page 8-33 Transfer Guide Assembly RG5-3525-000CN Table 8-9 on page 8-19 Transfer Roller Assembly RG5-3579-000CN Table 8-10 on page
Numerical Parts List Part Number Description Table Number and Page C3974-69001 Formatter Assembly C4116A 250-sheet Universal Paper Tray Table 8-16 on page 8-31 C4110-40004 Control Panel Overlay (English) Table 8-6 on page 8-12 RB1-2190-000CN Tray 2 Hook Table 8-8 on page 8-17 RB1-6130-000CN Tray 1 Pickup Gear Table 8-8 on page 8-17 RB1-6134-000CN Tray 1 Sensor Arm Table 8-5 on page 8-10 RB1-6136-000CN Tray 1 Sensor Arm Spring Table 8-5 on page 8-10 RB1-6141-000CN Grounding Plate Tab
Part Number Description Table Number and Page RB2-1781-000CN Paper Sensor Lever Table 8-7 on page 8-14 RB2-1782-000CN Paper Sensor Lever Table 8-7 on page 8-14 RB2-1783-000CN Paper Sensor Lever Spring Table 8-7 on page 8-14 RB2-1784-000CN Paper Sensor Lever Spring Table 8-7 on page 8-14 RB2-1790-000CN Sensor Mount (Rear of Controller Pan) Table 8-20 on page 8-36 RB2-1791-000CN Sensor Lever RB2-1796-000CN Cam Left Table 8-8 on page 8-17 RB2-1797-000CN Cam Right Table 8-8 on page 8-17
Part Number Description Table Number and Page RB2-1989-000CN Left Bushing Lower Delivery Roller Table 8-7 on page 8-14 RB2-1990-000CN Grounding Plate Table 8-7 on page 8-14 RB2-1991-000CN Right Latch Block Table 8-5 on page 8-10 RB2-1992-000CN Left Latch Block Table 8-5 on page 8-10 RB2-1996-000CN Face Down Guide Roller Table 8-9 on page 8-19 RB2-1997-000CN Roller Holder Table 8-9 on page 8-19 RB2-2020-000CN Tray Extension Table 8-16 on page 8-31 RB2-2037-000CN Tray Cover, 250-sheet
Part Number Description Table Number and Page RG5-3519-000CN Tray 1 Pickup Roller Assembly Table 8-8 on page 8-17 RG5-3520-000CN Tray 1 Paper Guide Plate Assembly Table 8-7 on page 8-14 RG5-3521-000CN Paper Pickup Roller Assembly (Tray 2) Table 8-12 on page 8-23 RG5-3522-000CN Paper Feed Roller Assembly RG5-3523-000CN Sensor Cable Table 8-14 on page 8-27 RG5-3524-000CN Registration Roller Assembly Table 8-15 on page 8-29 RG5-3525-000CN Transfer Guide Assembly Table 8-9 on page 8-19 RG5
Part Number Description Table Number and Page RH2-5338-000CN Cable, Ribbon, from Paper PCA to Controller Figure 8-4 on page 8-14 RH3-2195-000CN Power Supply (100 - 120 V) Table 8-19 on page 8-35 RH3-2196-000CN Power Supply (220 - 240 V) Table 8-19 on page 8-35 RH7-1354-000CN Fan Table 8-8 on page 8-17 RH7-1356-000CN Main Motor Table 8-17 on page 8-33 RH7-5192-000CN Paper Feed Clutch Table 8-7 on page 8-14 RH7-5193-000CN Pickup Solenoid Table 8-18, on page 8-36 RH7-5195-000CN Paper P
8-52 Parts and Diagrams EN
Index Numerics D 500-sheet Feeder PCA, removing and replacing 681 500-sheet Tray, disassembly 6-74 DC Controller Board, removing and replacing 6-47 Delivery Roller Removal, removing and replacing 668 diagrams reference 7-80 DIMM slots 5-16 documentation 2-4 drives laser 5-8 scanner 5-8 D-roller, removing and replacing 6-79 drum cleaning 5-22 conditioning 5-23 Duplexer 5-38 duplexer paper jam 5-44 refeed system 5-38 reversing system 5-38 A AC/DC power distribution 5-3 accessories 8-4 assemblies, removing
H P heavy paper 1-20 page count 3-31 page protect 5-16 paper heavy 1-20 motion control 5-9 specifications 1-11 Paper Feed Belt Assembly, removing and replacing 6-51 Paper Feed Roller Assembly, removing and replacing 6-44 Paper Feed System 5-29 Paper Guide, removing and replacing 6-59 Paper Handling menu 3-7 Paper Handling PCA, removing and replacing 6-31 paper jam 5-37 duplexer 5-44 paper path cleaning 4-4 troubleshooting 7-41 Paper Path Detect Sensor, removing and replacing 6-60 Paper Size Spring Assemb
Print Quality menu 3-10 printer features 1-2 messages 7-16 model numbers 1-5 serial numbers 1-5 subsystems 5-2 testing 3-35 weight 1-9 printing engine test 3-35 interface 7-77 operating checks 7-6 Optional 250-sheet Tray 5-35 Optional 500-sheet Tray 5-35 Tray 1 5-31 Tray 2 5-33 Printing menu 3-13 Product Stewardship, power consumption 1-26 R Random Access Memory (RAM) 5-15 Rear Door/Rear Output Bin, removing and replacing 6-10 recycling toner cartridges 2-8 refeed system 5-38 Registration Assembly, removin
Tray Indicator Assembly, removing and replacing 676 troubleshooting 7-1 configuration page 7-46 display 7-11 engine test 7-9 Event Log 7-12 flowchart 7-4 general paper path 7-41 image quality 7-49 image system 7-75 information pages 7-44 interface 7-77 menu map 7-44 power on 7-7 preliminary operating checks 7-6 printer messages 7-16 printing system 7-6 troubleshooting process 7-2 U Upper Delivery Assembly, removing and replacing 6-66 V variable fusing temperature 5-28 vellum 1-18 W warranty statement 2-9
