HP LaserJet 4200, 4250, 4300 and 4350 Series printers Service Manual
Copyright and License Trademark Credits © 2004 Copyright Hewlett-Packard Development Company, LP Adobe®, Acrobat®, and PostScript® are trademarks of Adobe Systems Incorporated. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Corel® is a trademark of Corel Corporation or Corel Corporation Limited. The information contained in this document is subject to change without notice.
Table of contents 1 Product information Chapter contents.....................................................................................................................................1 Printer configurations...............................................................................................................................2 Base model.............................................................................................................................2 n model.........................
Envelopes with double side-seams......................................................................35 Envelopes that have adhesive strips or flaps......................................................35 Envelope margins................................................................................................35 Envelope storage.................................................................................................35 Labels ....................................................................
Information menu..................................................................................................................63 Paper-handling menu............................................................................................................64 Configure-device menu ........................................................................................................68 Printing submenu ................................................................................................
Basic operation of the printer..............................................................................................105 Printer operating sequence................................................................................105 Control system overview.....................................................................................................105 Pickup-and-feed system overview......................................................................................
Stacker-feed stationary jam...............................................................................141 Stacker residual-media jam...............................................................................141 Stapler/stacker ...................................................................................................................142 Stapler/stacker feed and delivery.......................................................................142 Staple-mode feed and delivery.....................
Removal and replacement strategy.....................................................................................................168 Required tools.....................................................................................................................168 Before performing service ..................................................................................................169 After completing service .......................................................................................
Tray 1 paper-pickup assembly ..........................................................................................257 Paper-feed assembly..........................................................................................................261 Reinstallation notes for the paper-feed assembly..............................................................262 Main drive assembly...........................................................................................................
Networking tab ..................................................................................................316 Other links .........................................................................................................317 Printer Status and Alerts software .....................................................................................317 To select status messages................................................................................318 To view status messages and information..
Paper-path checklist...........................................................................................369 Paper-path test ..................................................................................................369 To perform a paper-path test.............................................................................370 Jams in tray 1 ....................................................................................................371 Jams in tray 2 ....................................
HP LaserJet 4250 wiring diagram .....................................................................................427 HP LaserJet 4300 wiring diagram .....................................................................................428 HP LaserJet 4350 wiring diagram .....................................................................................429 500-sheet feeder wiring diagram........................................................................................
1 Product information Chapter contents ● Printer configurations ● Model and serial numbers ● Printer overview ● Software components ● Specifications ● Media specifications ● Hewlett-Packard limited warranty statement ● Print Cartridge Limited Warranty Statement ● Service approach ● Regulatory information ● Regulatory statements ● Country-/region-specific safety statements Chapter contents 1
Printer configurations The HP LaserJet 4200, 4250, 4300 and 4350 Series printers are available in a total of six models.
n model Table 1-2 Printer descriptions, n model n model Availability Configuration HP LaserJet 4200n printer (Q2426A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and one 500-sheet tray ■ HP Jetdirect 10/100Base-TX print server for network connection ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and one 500-sheet tray ■ HP Jetdirect 10/100Base-TX print server for network connection ■ 64 MB RAM, expandable to 512 MB ■ One 100-sheet tray and one 500-sheet tray ■ HP Jetd
tn model Table 1-3 Printer descriptions, tn model tn model Availability Configuration HP LaserJet 4200tn printer (Q2427A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect 10/100Base-TX print server for network connection ■ 64 MB RAM, expandable to 512 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect embedded print server for connecting to a 10/100Base-TX network ■ 80 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sh
dtn model Table 1-4 Printer descriptions, dtn model dtn model Availability Configuration HP LaserJet 4200dtn printer (Q2428A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect 10/100Base-TX print server for network connection ■ Duplexer for automatic two-sided printing ■ 80 MB RAM, expandable to 512 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect embedded print server for connecting to a 10/100Base-TX network ■ Duplexer for automa
dtns model Table 1-5 Printer descriptions, dtns model dtns model Availability Configuration HP LaserJet 4200dtns printer (Q2446A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect 10/100Base-TX print server for network connection ■ Duplexer for automatic two-sided printing ■ 500-sheet stacker output accessory ■ 80 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect 10/100Base-TX print server for network conne
dtnsl models Table 1-6 Printer descriptions, dtnsl model dtnsl model Availability Configuration HP LaserJet 4200dtnsl printer (Q2447A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect 10/100Base-TX print server for network connection ■ Duplexer for automatic two-sided printing ■ 500-sheet stapler/stacker output accessory ■ 80 MB RAM, expandable to 512 MB ■ One 100-sheet tray and two 500-sheet trays ■ HP Jetdirect embedded print server for conne
Model and serial numbers The model number and printer serial number are listed on an identification label located under the top cover on the right side of the printer. The model number is alphanumeric, such as Q2431A for the HP LaserJet 4300 product. The serial number contains information about the country/region of origin, as well as the revision level, the production code, and the production number of the printer. An example of a serial number is USBB123456.
Printer overview Hardware components Before working with the printer, familiarize yourself with its parts.
10 9 8 Figure 1-3 Hardware components; rear view 10 8 Interface ports (see Interface ports) 9 Slot for optional duplexer 10 Rear output bin (pull to open) 1 Product information
Interface ports The printer has five ports: two EIO slots and three ports for connecting to a computer or a network. 1 2 3 4 5 6 Figure 1-4 Interface ports (HP LaserJet 4250 is shown) 1 EIO slot 2 2 Diagnostic LED 3 Network connection (HP LaserJet 4250/4350 Series printers only) 4 EIO slot 1 5 IEEE 1284B-compliant parallel port 6 USB port (compatible with USB 2.
Software components The printer comes with helpful software, including printer drivers and optional software. For easy printer setup and access to the full range of printer features, HP recommends that the user install the software that is provided. Check the installation notes and Readme files on the printer CD for additional software and languages. HP software is not available in all languages.
Printer drivers Drivers included Printer drivers provide access to the printer features and allow the computer to communicate with the printer (by using a printer language). Check the install notes, Readme, and late-breaking Readme files on the printer CD for additional software and languages. The following printer drivers are included with the printer. The most recent drivers are available at www.hp.com/go/lj4200_software, www.hp.com/go/lj4250_software, www.hp.com/go/lj4300_software, or www.hp.
Additional drivers The following drivers are not included on the CD, but are available from the Internet. ■ OS/2 PCL 5 or PCL 6 printer driver ■ OS/2 PS printer driver ■ UNIX model scripts ■ Linux drivers ■ HP OpenVMS drivers NOTE The OS/2 drivers are available from IBM and are packaged with OS/2. They are not available for Simplified Chinese, Korean, Japanese, or Traditional Chinese.
Using the printer drivers Use one of the following methods to open the printer drivers from the computer: Operating System To change the settings for all print jobs until the software program is closed To change the print-job default settings (for example, to turn on Print on Both Sides by default) To change the configuration settings (for example, to add a physical option such as a tray or to enable or disable a driver feature such as Allow Manual Duplexing) Windows 98, NT 4.
Operating System 16 To change the settings for all print jobs until the software program is closed To change the print-job default settings (for example, to turn on Print on Both Sides by default) To change the configuration settings (for example, to add a physical option such as a tray or to enable or disable a driver feature such as Allow Manual Duplexing) want on the various pop-up menus.
Software for Macintosh computers The HP installer provides PostScript Printer Description (PPD) files, Printer Dialog Extensions (PDEs), and the HP LaserJet Utility for use with Macintosh computers. The embedded Web server can be used with Macintosh computers if the printer is connected to a network. PPDs Use PPDs in combination with the Apple PS drivers to gain access to the printer features and to allow the computer to communicate with the printer.
Specifications Hardware specifications Table 1-7 Product dimensions 1 Printer model Width Depth Height Weight1 HP LaserJet 4200, 4200n, 4200L, 4200Ln, 4300, and 4300n 418 mm (16.5 inches) 451 mm (17.8 inches) 366 mm (14.4 inches) 20 kg (45 lb) HP LaserJet 4250, 4250n, 4350, and 4350n 418 mm (16.5 inches) 451 mm (17.8 inches) 377 mm (14.8 inches) 20 kg (45 lb) HP LaserJet 4200tn and 4300tn 418 mm (16.5 inches) 451 mm (17.8 inches) 488 mm (19.
Table 1-9 Printer accessories Accessory Width Depth Height Weight 500-sheet feeder 418 mm (16.5 inches) 451 mm (17.8 inches) 121 mm (4.8 inches) 7 kg (15.4 lb) 1,500-sheet feeder 416 mm (16.4 inches) 514 mm (20.2 inches) 286 mm (11.3 inches) 13 kg (28.7 lb) Stacker 211 mm (8.3 inches) 427 mm (16.8 inches) 351 mm (13.8 inches) 4.2 kg (9.3 lb) Stapler/stacker 211 mm (8.3 inches) 427 mm (16.8 inches) 351 mm (13.8 inches) 4.2 kg (9.3 lb) Printer cabinet/stand 660 mm (26.
Electrical specifications WARNING! Power requirements are based on the country/region where the printer is sold. Do not convert operating voltages. This can damage the printer and void the product warranty. Table 1-11 Power requirements, HP LaserJet 4200, 4250, 4300 and 4350 Series printers Specification 110-volt models 220-volt models Power requirements 110 to 127 volts (± 10%) 220 to 240 volts (± 10%) 50/60 Hz (± 2 Hz) 50/60 Hz (± 2 Hz) Rated short-term current, HP LaserJet 4200/4200L/4300 8.
Table 1-14 Power consumption, HP LaserJet 4250 (average, in watts)1 1 2 3 4 Product model Printing2 Ready Sleep4 Off HP LaserJet 4250 675 W3 20 W 18 W 0.2 W HP LaserJet 4250n 675 W3 20 W 18 W 0.2 W HP LaserJet 4250tn 675 W3 20 W 18 W 0.2 W HP LaserJet 4250dtn 675 W3 21 W 19 W 0.2 W HP LaserJet 4250dtnsl 750 W3 22 W 19 W 0.2 W Values subject to change. See http://www.hp.com/support/lj4250 for current infromation.
Acoustic emissions Table 1-17 Sound power and pressure level1, HP LaserJet 42002 1 2 3 Sound power level Declared per ISO 9296 Printing3 (HP LaserJet 4200) LWAd= 6.8 Bels (A) [69 dB(A)] Ready (HP LaserJet 4200) LWAd= 4.0 Bels (A) [40 dB(A)] Sound pressure level Declared per ISO 9296 Printing3 (HP LaserJet 4200) LpAm= 54 dB (A) Ready (HP LaserJet 4200) LpAm= 27 dB (A) Values subject to change. See http://www.hp.com/support/ lj4200 for current information.
Table 1-19 Sound power and pressure level1, HP LaserJet 42502 1 2 3 Sound power level Declared per ISO 9296 Printing3 (HP LaserJet 4250) LWAd= 6.9 Bels (A) [69 dB(A)] Ready (HP LaserJet 4250) LWAd= 4.0 Bels (A) [40 dB(A)] Sound pressure level Declared per ISO 9296 Printing3 (HP LaserJet 4250) LpAm= 55 dB (A) Ready (HP LaserJet 4250) LpAm= 26 dB (A) Values subject to change. See http://www.hp.com/support/ lj4250 for current information.
Print speed specifications Table 1-22 Print speed specifications Printer model Letter A4 HP LaserJet 4200 35 ppm 33 ppm HP LaserJet 4200L 30 ppm 33 ppm HP LaserJet 4250 45 ppm 43 ppm HP LaserJet 4300 45 ppm 43 ppm HP LaserJet 4350 55 ppm 52 ppm Operating environment Table 1-23 Temperature and humidity 24 Environmental condition HP LaserJet 420 0 HP LaserJet 420 0L HP LaserJet 425 0 HP LaserJet 430 0 HP LaserJet 435 0 Printing temperature (printer and print cartridge) 10° to 32°C (
Media specifications This section contains information about the sizes, weights, and amount of media that each tray supports. General guidelines Some print media might meet all of the guidelines in this manual and still not produce satisfactory results. This problem might be the result of improper handling, unacceptable temperature and humidity levels, or other variables over which HP has no control.
■ Guidelines for using paper ■ Paper weight equivalents ■ Labels ■ Overhead transparencies ■ Envelopes ■ Card stock and heavy paper Supported media weights and sizes This section contains information about the sizes, weights, and amount of paper and other print media that each tray supports. Supported-media specifications tables Table 1-24 Tray 1 supported sizes and weights (all models) Size Dimensions1 Weight Capacity2 Letter 216 x 279 mm (8.
Table 1-24 Tray 1 supported sizes and weights (all models) (continued) Size Dimensions1 Envelope, DL ISO 110 x 220 mm (4.3 x 8.7 inches) Envelope, C5 ISO 162 x 229 mm (6.4 x 9.0 inches) Envelope, B5 ISO 176 x 250 mm (6.9 x 9.8 inches) Envelope, Monarch #7-3/4 98 x 191 mm (3.9 x 7.5 inches) Transparencies (only use transparencies that are designed for monochrome HP LaserJet printers) Minimum: 76 x 127 mm (3 x 5 inches) Labels Minimum: 76 x 127 mm (3 x 5 inches) Weight Capacity2 Thickness:0.
Table 1-25 Tray 2 and optional 500-sheet tray supported sizes and weights (all models) (continued) Size Dimensions1 Custom Minimum: 148 x 210 mm (5.8 x 8.3 inches) Weight NOTE For additional information about using custom media, see the notes under Media specifications. Maximum: 216 x 356 mm (8.5 x 14 inches) 1 2 Capacity2 The printer supports a wide range of sizes. Check the printer software for supported sizes.
Table 1-29 Optional stacker or stapler/stacker supported sizes and weights Size Dimensions1 Weight Capacity2 60 to 120 g/m2 (16 to 32 lb) 500 sheets of 75 g/m2 (20 lb) paper Stacker or stacker part of stapler/stacker only Letter 216 x 279 mm (8.5 x 11 inches) A4 210 x 297 mm (8.3 x 11.7 inches) Executive 184 x 267 mm (7.3 x 10.5 inches) Legal 216 x 356 mm (8.5 x 14 inches) B5 (JIS) 182 x 257 mm (7.2 x 10.1 inches) A5 148 x 210 mm (5.8 x 8.3 inches) Custom Minimum: 148 x 210 mm (5.8 x 8.
Paper and print media Category Specifications Acid content 5.5 pH to 8.0 pH Caliper 0.094 to 0.18 mm (3.0 to 7.0 mils) Curl in ream Flat within 5 mm (0.02 inch) Cut-edge conditions Cut with sharp blades, leaving no visible fray Fusing compatibility Must not scorch, melt, offset, or release hazardous emissions when heated to 200° C (392° F) for 0.
% to 55%. The following guidelines should be helpful when evaluating the paper-storage environment: ■ Paper should be stored at or near room temperature. ■ The air should not be too dry or too humid (because of the hygroscopic properties of paper). ■ The best way to store an opened ream of paper is to rewrap it tightly in its moisture-proof wrapping.
Guidelines for using paper For best results, use conventional 75- to 90-g/m2 (20- to 24-lb) paper. Make sure that the paper is of good quality, and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges. If you are unsure what type of paper you are loading (such as bond or recycled), check the label on the package of paper. CAUTION Some paper might cause print-quality problems, jamming, or damage to the printer.
Table 1-30 Paper weight equivalents U.S. postcard1 thickness (mm) 0.18 0.20 0.23 1 2 3 U.S. bond weight (lb) U.S. text/ book weight2 (lb) U.S. cover weight (lb) U.S. Bristol weight (lb) U.S. index weight (lb) U.S.
Envelopes If you do not have an optional envelope feeder, always print on envelopes from tray 1. If envelopes curl or jam, try opening the rear output bin. CAUTION Do not use the duplexer to print on envelopes. Damage to the printer might result. Do not send envelopes to the stacker or stapler/stacker. Damage to the stacker or stapler/ stacker might result. Envelope construction Envelope construction is critical.
Envelopes with double side-seams Double side-seam construction has vertical seams at both ends of the envelope rather than diagonal seams. This style might be more likely to wrinkle. Make sure that the seam extends all the way to the corner of the envelope, as illustrated.
Labels Use tray 1 to print on labels. Labels are multiple-layer media that typically consists of a face sheet (the printable surface), pressure-sensitive adhesive, and a liner (a carrier sheet coated with a release agent). Labels that are used in the HP LaserJet printer must be specifically designed for laser printers. If other labels are used, you risk labels peeling or adhesive contamination that can severely damage the printer.
Card stock and heavy paper Many types of card stock can be printed on from tray 1, including index cards and postcards. Some card stock performs well because its construction is better suited for feeding through a laser printer. For optimum printer performance, do not use media that is heavier than 200 g/m2 (53 lb) in tray 1 or 120 g/m2 (32 lb) in other trays. Paper that is too heavy might cause misfeeds, stacking problems, jams, poor toner fusing, poor print quality, or excessive mechanical wear.
Types of media to avoid The following characteristics can affect the performance of the HP LaserJet 4200, 4250, 4300 and 4350 Series printers printer unless the paper or other print media that is used is specifically designed to work with HP LaserJet printers. ■ Print media that is very rough, highly textured, or heavily embossed. ■ Multipart forms. ■ Print media that offsets materials or discolors. ■ Print media that is damaged, curled, wrinkled, or irregularly shaped.
Hewlett-Packard limited warranty statement PRODUCT DURATION OF LIMITED WARRANTY HP LaserJet 4200, 4200n, 4200tn, 4200dtn, 4200dtns, 4200dtnsL, 4200L, 4200Ln, 4250, 4250n, 4250tn, 4250dtn, 4250dtnsl, 4300, 4300n, 4300tn, 4300dtn, 4300dtns, 4300dtnsL, 4350, 4350n, 4350tn, 4350dtn, and 4350dtnsl One-year HP warrants to you, the end-user customer, that HP hardware and accessories will be free from defects in materials and workmanship after the date of purchase, for the period specified above.
TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.
Print Cartridge Limited Warranty Statement This HP Print Cartridge is warranted to be free from defects in materials and workmanship. This warranty does not apply to print cartridges that (a) have been refilled, refurbished, remanufactured or tampered with in any way, (b) experience problems resulting from misuse, improper storage, or operation outside of the published environmental specifications for the printer product or (c) exhibit wear from ordinary use.
Service approach Repair of the printer normally begins by using the printer's internal diagnostics in conjunction with the troubleshooting procedures that are described in chapter 6. When a faulty part is located, repair is generally accomplished by assembly-level replacement of field-replaceable units (FRUs) (listed in chapter 7). Some mechanical assemblies might be repaired at the subassembly level. HewlettPackard Company does not support replacement of components on printed circuit boards.
Regulatory information This section contains regulatory statements for this product. 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.
Environmental product stewardship program This section explains HP's environmental stewardship initiatives. Protecting the environment Hewlett-Packard Company is committed to providing quality products in an environmentally sound manner. This product has been designed with several attributes to minimize impacts on our environment. Ozone production This product generates no appreciable ozone gas (O3).
HP LaserJet printing supplies In many countries/regions, the printing supplies (for example, print cartridge and fuser) can be returned to HP through the HP Printing Supplies Environmental Program. This easy-to-use and free take-back program is available in more than 30 countries/regions. Multilingual program information and instructions are included in every new HP LaserJet print cartridge and supplies package.
Material safety data sheet Material Safety Data Sheets (MSDS) for supplies that contain chemical substances (for example, toner) can be obtained by contacting the HP Web site at http://www.hp.com/go/msds or http://www.hp.com/hpinfo/community/environment/productinfo/safety. For more information To obtain information about the following environmental topics, visit http://www.hp.com/go/ environment or http://www.hp.com/hpinfo/community/environment/productinfo/safety.
Regulatory statements Declaration of Conformity according to ISO/IEC Guide 22 and EN 45014 Manufacturer's Name: Hewlett-Packard Company Manufacturer's Address: 11311 Chinden Boulevard, Boise, Idaho 83714-1021, USA declares, that the product Product Name: HP LaserJet 4200 Series, HP LaserJet 4200L Series, and HP LaserJet 4300 Series printer Regulatory Model Number3): BOISB-0202-00, BOISB-0204–00 Model Number: Q2425A, Q3993A, Q2431A Product Options: All conforms to the following Product Specificat
Declaration of Conformity Manufacturer's Address: 11311 Chinden Boulevard, Boise, Idaho 83714-1021, USA declares, that the product Product Name: HP LaserJet 4250 and LaserJet 4350 printer Regulatory Model Number : BOISB-0309-00 Model Number: Q5400A, Q5407A 3) Including optional duplex accesssory (Q2439B), optional 500-sheet input tray (Q2440B), optional 1500-Sheet Input Tray (Q2440B), and optional 500-sheet stapler/stacker accessory (Q2443B) Product Options: ALL conforms to the following Product
Country-/region-specific safety statements Laser safety statement The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. The printer is certified as a "Class 1" laser product under the U.S.
Finnish laser statement LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP LaserJet 4200, 4200n, 4200tn, 4200dtn, 4200dtns, 4200dtnsL, 4200L, 4200Ln, 4250, 4250n, 4250tn, 4250dtn, 4250dtnsl, 4300, 4300n, 4300tn, 4300dtn, 4300dtns, 4300dtnsL, 4350, 4350n, 4350tn, 4350dtn, and 4350dtnsl -laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite. Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn laitteen ulkopuolelle.
2 Installation Chapter contents ● Operating environment ● Site requirements ● Software installation Chapter contents 51
Operating environment Place the printer on a sturdy, level surface in a well-ventilated area that meets the following environmental requirements: ■ Temperature: 15° to 32.5°C (59° to 90.
Site requirements The following environmental specifications must be maintained to ensure the correct 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, continuous surface, with all four printer feet level. Do not install on carpet or other soft surfaces. ■ Make sure that adequate power is supplied. Uninterruptible power supplies (UPSs) are not recommended.
Software installation Information about installing and uninstalling the printing system software is available in chapter one of the electronic user guide on the installation cd.
3 Operation Chapter contents ● Using the control panel ● Control-panel menus Chapter contents 55
Using the control panel The following sections describe the use and layout of the printer control panel.
Control-panel lights The control-panel lights provide information about printer status. Light State Indication Ready On The printer is online and ready to accept data to print. Off The printer cannot accept data because it is offline (paused) or has experienced an error. Blinking The printer is going offline. The printer stops processing the current print job and expels all of the active pages from the paper path. On The printer has data to print, but is waiting to receive all of the data.
Control-panel buttons Button Function CANCEL JOB (HP LaserJet 4200/4300 Series printers) ■ STOP (HP LaserJet 4250/4350 Series printers) Cancels the current print job in process and expels all of the active pages from the paper path. The time that it takes to cancel the job depends on the size of the print job. (Press the button only once.) Also clears continuable errors that are associated with the canceled job.
Settings and defaults The printer makes most printing decisions based on either temporary settings or permanent defaults. NOTE Settings that are sent from software programs override printer defaults. Table 3-1 Settings and defaults Setting or default Explanation Temporary setting A value that is set in the software program for the current print job. 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 Most routine printing tasks that the printer performs originate from a computer software program or a printer driver. These two methods are the most convenient way to control the printer, and they override the printer control-panel settings. See the Help file for your program for more information. Printer settings can also be changed by using the printer control panel.
To change a control-panel setting 1 Press 2 Use (UP ARROW button) or press . 3 Some menus might have several submenus. Use want, and then press . 4 Use or to scroll to the setting, and then press . Some settings change rapidly if or is held down. An asterisk (*) appears next to the selection on the display, indicating that it is now the default. 5 Press the PAUSE/RESUME button or the MENU button to close the menu. (SELECT button) or the MENU button to open the menus.
Retrieve Job menu This menu provides a list of the stored jobs in the printer and access to all of the job-storage features. You can print or delete these jobs at the printer control panel. NOTE If you turn the printer power off, all stored jobs are deleted unless an optional hard disk is installed. The section that follows lists the settings and possible values. In the Values column, the default value for each setting is the one that has an asterisk (*) next to it.
Information menu The Information menu contains printer information pages that give details about the printer and its configuration. Scroll to the information page that you want, and then press (SELECT button). Item Explanation PRINT MENU MAP The menu map shows the layout and current settings of the printer-control-panel menu items. For more information, see Printing control-panel menus. PRINT The configuration page shows the current printer configuration.
Paper-handling menu If paper-handling settings are correctly configured at the printer control panel, you can print by selecting the type and size of media in the program or the printer driver. For more information about supported media types and sizes, see Supported media weights and sizes and Paper and print media. Some items on this menu (such as duplex and manual feed) are available in the program or the printer driver (if the appropriate driver is installed).
Item Values Explanation B5 (JIS) EXECUTIVE (JIS) D POSTCARD (JIS) 16K ENVELOPE 10 ENVELOPE MONARCH ENVELOPE C5 ENVELOPE DL ENVELOPE B5 CUSTOM TRAY 1 TYPE *ANY PLAIN PREPRINTED LETTERHEAD TRANSPARENCY PREPUNCHED LABELS Use this item to set the value to correspond with the type of media that is currently loaded in tray 1. ANY: If both the type and size for tray 1 are set to ANY, the printer will pull media from tray 1 first if media is loaded in the tray.
Item Values Explanation *PLAIN PREPRINTED LETTERHEAD TRANSPARENCY PREPUNCHED LABELS BOND RECYCLED COLOR CARDSTOCK > 64 g/m2 ROUGH TRAY [N] TYPE ANY *PLAIN PREPRINTED LETTERHEAD Use this item to set the value to correspond to the type of media currently that is loaded in the specified tray, where [N] is the number of the tray. This item appears only if an optional tray is installed.
Item Values Explanation Y DIMENSION UNIT OF MEASURE: Use this option to select the unit of measure to use when you set custom paper sizes for the specified tray. X DIMENSION: Use this item to set the measurement of the width of the paper (measurement from side to side in the tray). The options are 3.0 to 8.50 INCHES or 76 to 216 MM. Y DIMENSION: Sets the measurement of the length of the paper (measurement from front to back in the tray). The options are 5.0 to 14.00 INCHES or 127 to 356 MM.
Configure-device menu This menu contains administrative functions. Printing submenu Print-quality submenu System Setup submenu Stapler/stacker submenu I/O submenu Resets submenu (HP LaserJet 4250/4350 only) Printing submenu Some items on this menu are available in the program or printer driver (if the appropriate driver is installed). Program and printer-driver settings override control-panel settings. In general, it is better to change these settings in the printer driver, if applicable.
Item Values Explanation EXECUTIVE (JIS) DPOSTCARD (JIS) 16K ENVELOPE 10 ENVELOPE MONARCH ENVELOPE C5 ENVELOPE DL ENVELOPE B5 CUSTOM DEFAULT UNIT OF MEASURE CUSTOM PAPER X DIMENSION SIZE Y DIMENSION PAPER DESTINATION *STANDARD TOP BIN Use this item to set a default custom paper size for tray 1 or any 500-sheet tray. This menu appears only if the CustomStandard switch in the selected tray is set to Custom. Use this item to configure the output bin destination.
Item Values Explanation YES NO: Up to 78 10-pitch characters can be printed on one line YES: Up to 80 10-pitch characters can be printed on one line PRINT PS *OFF ERRORS ON Use this item to select whether or not a PS error page prints or not. OFF: PS error page never prints ON: PS error page prints when PS errors occur PRINT PDF *OFF ERRORS (HP LaserJet 4250/4350 only) ON Use this item to select whether or not a PDF error page prints or not.
Print-quality submenu Some items on this menu are available in the program or printer driver (if the appropriate driver is installed). Program and printer-driver settings override control-panel settings. In general, it is best to change these settings in the printer driver, if applicable. The section that follows lists the settings and possible values. In the Values column, the default value for each setting is the one with an asterisk (*) next to it.
Item Values ROUGH ENVELOPE Explanation CAUTION Do not change the fuser mode for transparencies. Failure to use the LOW 2 setting while printing transparencies can result in permanent damage to the printer and fuser. Always select Transparencies as the Type in the printer driver and set the tray type at the printer control panel to TRANSPARENCY. When selected, RESTORE MODES resets the fuser mode for each media type to its default setting.
Item Values Explanation CAUTION HP does not recommend full-time use of EconoMode. If EconoMode is used full-time, it is possible that the toner supply will outlast the mechanical parts in the print cartridge. TONER 1 to 5 (*3) DENSITY Lighten or darken the print on the page by setting the toner density. Select a setting ranging from 1 (light) to 5 (dark). The default setting of 3 usually produces the best results. NOTE It is best to change the toner density in the program or printer driver.
System Setup submenu Items on this menu affect printer behavior. Configure the printer according to your printing needs. The section that follows lists the settings and possible values. In the Values column, the default value for each setting is the one with an asterisk (*) next to it. Item Values Explanation DATE/TIME (HP LaserJet 4250/4350 only) DATE Use this item to set the date and time settings.
Item Values Explanation PS DEFER MEDIA: Use this item to control whether the PostScript (PS) or HP paper-handling model is used to print jobs. ENABLED causes PS to defer to the HP paperhandling model. DISABLED uses the PS paper-handling model. SIZE/TYPE PROMPT: Use this item to control whether the tray configuration message and its prompts are shown whenever a tray is opened and closed.
Item Values Explanation CARTRIDGE STOP LOW *CONTINUE Use this item to specify how the printer behaves if the print cartridge is low. For the HP LaserJet 4250 Series printer, the message first appears when about 15% (10,000-page cartridge) or about 8% (20,000-page cartridge) of the life remains in the print cartridge. For the HP LaserJet 4350 Series printer, the message first appears when about 25% (10,000-page cartridge) or about 15% (20,000-page cartridge) of the life remains in the print cartridge.
Stapler/stacker submenu Use this submenu to select settings for the optional stapler/stacker, if it is installed. Some items on this menu are available in the program or printer driver (if the appropriate driver is installed). The section that follows lists the settings and possible values. In the Values column, the default value for each setting is the one that has an asterisk (*) next to it. Item Values Explanation STAPLES *NONE Use this item to specify whether print jobs are stapled or not.
Item Values Explanation ADVANCED FUNCTIONS: Turn the bidirectional parallel communication on or off. The default is set for a bidirectional parallel port (IEEE-1284). The function allows the printer to send status readback messages to the computer. (Turning the parallel advanced functions on might slow language switching.) EMBEDDED JETDIRECT MENU (HP LaserJet 4250/4350 only) TCP/IP Use this item to select features in the embedded Jetdirect.
kit should be installed to maintain optimum print quality and feed performance. For more information, see Performing preventive maintenance. To order the printer maintenance kit, see Ordering parts and supplies. SLEEP MODE *ON Turns Sleep Mode on or off.
Diagnostics menu (HP LaserJet 4250/4350 only) Administrators can use this submenu to isolate parts and to troubleshoot jam and print-quality issues. The section that follows lists the settings and possible values. In the Values column, the default value for each setting is the one that has an asterisk (*) next to it. Item Values Explanation PRINT EVENT LOG There is no value to select. Press (SELECT button) to generate a list of the 50 most recent entries in the event log.
4 Maintenance Chapter contents ● Cleaning the printer and accessories ● Performing preventive maintenance ● Maintaining the stapler unit ● Downloading a remote firmware update ● Remote firmware update using FTP through a browser ● Remote firmware update using Fetch (Mac OS 8.6 and OS 9.x only) ● Remote firmware update using the HP LaserJet utility (Mac OS 8.6 and OS 9.
Cleaning the printer and accessories To maintain superior print quality and performance, thoroughly clean the printer and the paperhandling accessories at the following times: ■ Every time you change the print cartridge. ■ After printing approximately 10,000 pages. ■ Whenever print-quality problems occur. Clean the outside surfaces of the printer and accessories by using a water-dampened cloth. Clean the inside parts as indicated, see Table 4-1 Cleaning the printer.
Table 4-1 Cleaning the printer (continued) Component Cleaning method/notes Inside With a dry, lint-free cloth, wipe any dust, spilled toner, and paper particles from the paperpath area, the registration roller, and the print-cartridge cavity. Do not touch the transfer roller with bare hands. Paper-pickup, feed, and separation rollers Use a water-dampened, lint-free cloth. Tray 1 separation pad Use a dry, lint-free cloth. Registration roller Use a dry, lint-free cloth.
5 Use or to scroll to CREATE CLEANING PAGE (LJ 4200/4300) or PROCESS CLEANING PAGE (LJ 4250/4350), and then press . 6 Follow the instructions on the cleaning page to complete the cleaning process (LJ 4200/4300 only). 7 If a duplexer is installed, close the rear output bin. You might need to create and process a cleaning page more than once. When toner has been cleaned from the fuser assembly, shiny black spots appear on the page's black strip.
Running the cleaning page automatically Use the following procedure to set the printer to print cleaning pages automatically at a specified interval. In order for the cleaning page to run without intervention, the selected size and the plain paper type must be available in the printer. The printer will not interrupt a printing job in-process to run a cleaning page. NOTE HP recommends that the cleaning-page interval be set at 2,000 pages (or fewer) to make sure that excess toner is removed from the printer.
Performing preventive maintenance Replace specific parts when the PERFORM PRINTER MAINTENANCE message appears on the printer control-panel display. This helps the printer maintain optimum performance. The maintenance message appears every 200,000 pages on HP LaserJet 4200/4300 Series printers or every 225,000 pages on HP LaserJet 4250/4350 Series printers.
Resetting the maintenance-kit counter (LJ 4250/4350) After a maintenance kit is installed, the maintenance-kit counter must be reset by using the following procedure. 1 Turn the printer off and then on. 2 When 000MB (the beginning of the memory-count) appears on the control-panel display, press and hold down (SELECT button). Continue holding down until all three printer control panel lights flash once, and then stay on. This might take up to 10 seconds.
Expected life of components The following table shows the expected life of certain components in the printer. To order parts, see Ordering parts and supplies.
Maintaining the stapler unit Follow these instructions to maintain the stapler unit. To remove and replace the stapler unit 1 Locate the stapler unit on the right side of the stapler/stacker. 2 Rotate the stapler unit toward the front of the printer until the unit clicks. Hold the stapler unit in this open position. 3 Push down on the tab at the top of the stapler unit. 4 Hold the tab down and pull the stapler unit up and out of the stapler/stacker.
Loading staples Load staples if the printer control-panel display prompts you with a STAPLER LOW ON STAPLES message (the staple cartridge contains fewer than 70 staples) or a STAPLER OUT OF STAPLES message (the staple cartridge contains 15 or fewer staples). For more information see Staple leveldetection. When the stapler runs out of staples, jobs can be delivered to the stapler/stacker (if STAPLES OUT = CONTINUE), but they will not be stapled. For more information see Stapler/stacker submenu.
Downloading a remote firmware update A remote firmware update (RFU) can be downloaded from the following Web sites: http://www.hp.com/go/lj4200_firmware, http://www.hp.com/go/lj4250_firmware, http://www.hp.com/go/ lj4300_firmware, or http://www.hp.com/go/lj4350_firmware. Downloading the new firmware to the printer The printer can receive an RFU update to a printer as long as it is in a Ready state. The printer waits for all of the I/O channels to become idle before performing the update.
Remote firmware update through a local Windows port If the printer is connected through a local port (USB or parallel), then you can send the RFU file directly to the printer by using a Copy command from a command prompt or an MS-DOS window. At the command prompt, perform the following steps for your operating system.
Windows NT 4.0, Windows 2000, Windows XP, or Windows Server 2003 The .rfu file can be sent directly to the printer by typing a copy command at a command prompt or in an MS-DOS window. 1 At a command prompt, type: copy /b where is the name of the .rfu file, including the path, and is the name of the appropriate printer port, such as LPT1. For example, C:\>copy /b c:\4250fw.rfu lpt1.
Windows operating systems 1 Take note of the TCP/IP address on the EIO Jetdirect page. The HP Jetdirect page is the second page of the configuration page printout. NOTE Before connecting to the printer, make sure that the printer is not in PowerSave or Sleep mode. Also, make sure that any error messages are cleared from the control panel. 2 Open a command window on your computer. 3 Type: ftp For example, if the TCP/IP address is 192.168.0.90, type: ftp 192.168.0.
Mac operating systems 1 Take note of the TCP/IP address on the EIO Jetdirect page. The Jetdirect page is the second page of the configuration page printout. 2 Open a Terminal window on the Macintosh. You can find the Terminal Program on the computer hard drive in the Applications/Utilities folder. 3 Type: FTP For example, if the TCP/IP address is 192.168.0.90, type: FTP 192.168.0.90. 4 Press Enter. 5 When prompted for a user name and password, press Enter.
Remote firmware update using FTP through a browser Follow these instructions to use FTP through a browser to update the printer firmware remotely. NOTE The following instructions can be used on Windows or Macintosh operating systems. 96 1 Open a browser window. 2 In the address line of the browser, type: ftp:// where is the TCP/ IP address of your printer. For example, if the TCP/IP address is 192.168.0.90, type: FTP 192.168.0.90 3 Locate the RFU file for the printer.
Remote firmware update using Fetch (Mac OS 8.6 and OS 9.x only) For Mac OS 8.6 through 9.x, a shareware program called Fetch provides FTP control for a Put command. Download and install the program from http://download.cnet.com/ downloads/0-10207-100-5250613.html. Follow these instructions to use Fetch. 1 Start the program by clicking the Fetch icon. 2 Type the IP address of the printer in the Host: box. 3 Click the Put Files button and browse to the location of the RFU file.
Remote firmware update using the HP LaserJet utility (Mac OS 8.6 and OS 9.x only) Follow these instructions to update the firmware by using the HP LaserJet utility. 1 The first step is to make sure that you have the tools and files that are necessary for the update. You will need the HP LaserJet utility and the RFU file, which is the firmware file for the printer. The HP LaserJet utility is on the HP LaserJet 4200/4250/4300/4350 printing-system software CD that came with the printer.
Remote firmware update using the LPR command NOTE This remote firmware update method is for use in Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003. Follow these instructions to update the printer software remotely by using the LPR command.
Using HP Web JetAdmin to download the firmware to the printer The following procedure requires that you install HP Web JetAdmin version 7.0 or later on your computer. Complete the following steps to update a single printer through HP Web JetAdmin after downloading the RFU file from the HP Web site. 1 Start HP Web JetAdmin. 2 Type the TCP/IP address or IP host name of the printer in the Quick Device Find field, and then click Go. The printer Status window appears.
Printer messages during firmware update The printer shows three messages that appear during a normal update process. Table 4-4 Update messages Printer message Explanation RECEIVING UPGRADE Appears when the printer recognizes the start of an RFU update and remains until the printer verifies the validity and integrity of the RFU update. UPRGRADING PRINTER Appears when the printer is reprogramming the firmware.
Troubleshooting a firmware update The following table lists the causes and results of possible interruptions to the firmware update. Table 4-5 Troubleshooting a firmware update Cause Result The control panel cancelled a job. No update occurred. A break in the I/O stream occurred during a send. No update occurred. A power cycle occurred during RECEIVING UPGRADE . No update occurred. A power cycle occurred during UPGRADING PRINTER. No update occurred. Resend the update through a parallel port.
5 Theory of operation Chapter contents ● Introduction ● General descriptions ● Paper-pickup-and-feed system ● Stacker and stapler/stacker ● Image-formation system ● Formatter system Chapter contents 103
Introduction This chapter presents an overview of the relationships among major components in the printer.
Basic operation of the printer Printer operation can be divided into four systems: the control system (which includes the power supply and dc controller PCA), the pickup and feed system (which consists of various rollers and transports the media through the printer), the laser/scanner system (which forms the latent image on a photosensitive drum), and the image formation system (which transfers a toner image onto the print media).
Pickup-and-feed system overview The pickup-and-feed system consists of a motor, various rollers, and sensors that detect the presence of media, transport the media into and through the printer, and deliver the media to an output bin. During the transport process, if the media does not reach specific sensors in a specified time, the microprocessor on the dc controller PCA halts the motor and a jam message appears on the controlpanel display.
General descriptions This section describes the following printer components.
Dc controller PCA The dc controller PCA controls the operation of the printer and its components. The dc controller PCA starts printer operation when the printer power is turned on and the power supply sends dc voltage to the dc controller PCA.
Motor and fan control The HP LaserJet 4200 Series printers contain three dc brushless motors: the main motor, the lifterdriver motor (inside of the lifter-driver assembly), and a fan motor. The main motor is used for image formation (rotating the photosensitive drum in the print cartridge) and paper pickup and feed. The lifter motor raises the plate in the tray cassette. The fan motor rotates the fan blades.
Power supply The power supply consists of the fuser-control circuit, the high-voltage circuit, and the low-voltage circuit. The fuser-control and high-voltage circuits control the temperature of the fuser and generate high-voltage according to signals from the dc controller PCA. The low-voltage circuit generates the dc voltages that other components in the printer use (for example the dc controller PCA, the motors, and fans).
Figure 5-3 Fuser components Fuser over-temperature protection The fusing heater safety circuit is located on the power supply and constantly monitors the fusing temperature. To protect the fuser from excessive temperatures, the printer has the following three protective functions: ■ The CPU monitors the voltage of the thermistor. If the fuser temperature reaches 240°C (464°F) or higher, the CPU turns off the relay (RL101) to interrupt the power to the fusing heater.
Laser/scanner assembly The laser/scanner produces the latent electrostatic image on the photosensitive drum in the print cartridge. The main components of the laser/scanner assembly are the laser driver PCA, the scanner motor, various mirrors, and the focusing lenses. Figure 5-4 Laser/scanner assembly The laser scanner uses two laser diodes to scan two lines simultaneously, producing high-speed laser scanning.
strike the six-sided scanning mirror and are directed through the focusing lenses and onto the photosensitive drum. The modulated laser beams generate the latent electrostatic image on the photosensitive drum according to the image data signals that the dc controller PCA sends. 1 As it receives a print command from the formatter, the dc controller outputs the SCANNER MOTOR SPEED CONTROL signal (/ACC) and rotates the scanner motor in order to rotate the six-sided mirror.
Paper-pickup-and-feed system The pickup-and-feed system consists of various rollers that the printer motors drive. The printer uses tray 1 (the manual feeding tray) and a cassette in tray 2 as media sources. The printed media is delivered to either the rear output bin (straight-through printing) or the top output bin (the default destination). One 500-sheet feeder and one 1,500-sheet feeder can be added to HP LaserJet 4200/4300 Series printers.
Figure 5-5 Printer paper-pickup-and-feed block diagram Paper-pickup-and-feed system 115
Pickup-and-feed block The pickup-and-feed system is divided into two blocks: The pickup-and-feed block and the fuser/ delivery block.
As the pre-feed sensor (PS102) detects the media, the dc controller PCA turns off the clutch, which stops the media. When the dc controller PCA detects that the laser/scanner is ready it activates the feed clutch again. The feed roller moves the media farther into the printer. The registration shutter corrects page skew and the media is transported to the fuser/delivery block. For information about the timing of these operations, see General timing diagrams.
Separation pad Tray 1 pickup roller Tray 1 pickup solenoid Cam Lifter Figure 5-7 Tray 1 pickup 118 5 Theory of operation
Printing from tray 2 When the dc controller PCA receives the print command, the main motor (M101) and scanner motor start their rotation. When the main motor reaches its prescribed speed, the feed roller clutch (CL101) and tray 2 pickup solenoid (SL101) are activated. (The main motor rotation drives the tray 2 pickup roller, tray 2 feed roller, tray 2 separation roller, and paper-feed rollers.) The tray 2 pickup roller, which the pickup solenoid activates, rotates once and picks up the media in the tray.
The tray 2 cassette can detect the media size by using the switches described; however, the user can define the media size for the tray by using the control panel (see Paper-handling menu). In this case, the printer might not detect the media size correctly if the size that the user defined does not match the tray settings. To prevent a false size-detection, the printer measures the time it takes for the media to pass through the printer and determines the size of media that was fed from the tray.
Multiple-feed prevention The printer uses the separation roller in tray 2 to prevent multiple-feeding. Normally, the separation roller rotates in the same direction as the feed roller. The separation roller is equipped with a torque limiter, but because the force of the feed roller exceeds that of the torque limiter, the separation roller is actually driven by the feed roller.
Fuser/delivery block The pickup-and-feed system is divided into two blocks: the pickup-and-feed block and the fuser/ delivery block. Figure 5-9 Pickup-and-feed and fuser/delivery block diagram 1 Fuser/delivery block 2 Pickup-and-feed block The fuser/delivery block consists of rollers, sensors, the fuser, and the output delivery assembly. The rollers transport the media through the fuser/delivery block paper path.
Printer pickup delay jam from tray 1 If the top-of-page sensor (PS103) does not detect the leading edge of the media within a specific period of time after the media is picked up, the microprocessor on the dc controller PCA determines that a pickup jam has occurred. NOTE The printer attempts to pick up the media several times before determining that a pickup jam exists. The number of pickup attempts depends on the source (for example, four attempts occur if tray 1 is the source).
If the fuser delivery sensor (PS108) does not detect the trailing edge of the media within a specified period of time after a printer delivery wrap jam is detected, or if the fuser delivery sensor (PS108) does not detect the trailing edge of the media within a specified period of time after it has detected the leading edge of the media, the microprocessor on the dc controller PCA determines that a printer delivery wrap jam has occurred. The transport process stops and a 13.XX.
Printing from the 500-sheet feeder NOTE HP LaserJet 4200/4300 Series printers support up to two optional 500-sheet feeders. HP LaserJet 4250/4350 Series printers support up to three optional 500-sheet feeders. The paper-feeder driver controls the 500-sheet feeder operation sequences. An 8-bit microprocessor in the paper-feeder driver controls the 500-sheet feeder sequences and the communication with the dc controller PCA. The paper-feeder driver drives the solenoid in response to the pickup command.
500-sheet feeder pickup and feeding Three switches on the paper-feeder driver detect the media size and the presence of the 500-sheet tray. The relationship between the switch combinations and the paper sizes is the same as for the printer. The main motor (M101) drives the paper feeder. When the dc controller PCA sends a print command, the main motor begins to rotate.
Figure 5-11 500-sheet feeder pickup-and-feed diagram Paper-pickup-and-feed system 127
Printing from the 1,500-sheet feeder The paper-feeder driver controls the 1,500-sheet feeder operation sequences. An 8-bit microprocessor in the paper-feeder driver controls the 1,500-sheet feeder sequences and the communication with the dc controller PCA. The paper-feeder driver drives the solenoid in response to the pickup command. The paper-feeder driver also reports the paper-feeder status to the dc controller PCA.
1,500-sheet feeder pickup and feeding Three switches on the paper-feeder driver detect the media size and the presence of the 1,500-sheet tray. The relationship between the switch combinations and the paper sizes is the same as for the printer. The main motor (M101) drives the paper feeder. When the dc controller PCA sends a print command, the main motor begins to rotate.
Figure 5-13 1,500-sheet feeder pickup-and-feed diagram 130 5 Theory of operation
1,500-sheet feeder lifting mechanism The lifting mechanism maintains the media-stack surface at a specific position inside the 1,500-sheet feeder. So that the feeder can perform a stabilized pickup operation regardless of the size of the media in the feeder. Two wire cables lift the lift plate inside of the feeder. A motor (M1) uses pulleys in the feeder to wind the wires.
Envelope feeder The envelope-feeder driver controls the envelope feeder operation sequences. An 8-bit microprocessor in the envelope feeder driver controls the envelope-feeder sequence and the communication with the dc controller PCA. The dc controller PCA sends the pickup command to the envelope-feeder driver with the necessary timing. The envelope-feeder driver activates the solenoid in response to the command.
Figure 5-16 Envelope-feeder pickup-and-feed diagram Envelope feeder jam detection The envelope feeder uses the envelope multiple-feed sensor (PS902) along with sensors in the printer to detect the presence of media and to determine whether the media is feeding correctly or is jamming. If a jam occurs in the envelope feeder, the error message 13.xx.yy appears on the control-panel display. For more information see Numerical printer messages.
Duplexer The duplexer driver controls the duplexer operation. An 8-bit microprocessor in the duplexer driver controls the duplexer sequence and the communication with the dc controller PCA. The duplexer driver drives the solenoid, motors, and fan according to commands that the dc controller PCA sends to the duplexer. The duplexer also communicates its status to the dc controller PCA. The printer delivers a charge of +24 Vdc to the duplexer, which then generates +5 V for the integrated circuits.
Reversing and duplexer pickup The duplexer has two stepping motors: the reversing motor (M701) and the duplex-feed motor (M702). The duplexer driver controls forward and reverse motor rotations. The duplexer solenoid controls the face-up output tray diverter, which feeds paper to the duplexer. NOTE The duplexer cannot be used if the face-up tray is open. When the trailing edge of the media passes the reverse sensor (PS703), the reversing motor changes direction.
Duplexer jam detection The following sensors detect whether or not the print media is present and is feeding normally.
Stacker and stapler/stacker The stacker delivers media from the printer to the stacker delivery bin. The stapler/stacker also delivers media from the printer to the stacker delivery bin, but can staple the media together before delivering it to the stapler/stacker delivery bin. The dc controller PCA controls the stacker and stapler/ stacker.
Figure 5-20 Power-on sequence for the stacker and stapler/stacker 138 5 Theory of operation
Stacker The dc controller PCA controls the stacker and sends signals to the stacker-driver PCA. The stackerdriver PCA then controls the operation of the stacker components such as the stacker motor, solenoid, and sensors. When the printer power is turned on, dc power from the printer low-voltage supply circuit is supplied to the stacker. The stacker performs the power-on sequence and enters the standby mode.
Figure 5-21 Stacker-feed delivery diagram 140 5 Theory of operation
Stacker jam detection The stacker uses the following sensors to detect the presence of media and to verify whether the media is feeding correctly or is jamming. For information about the location of these sensors, see Stacker and stapler/stacker switches and sensors.
Stapler/stacker The dc controller PCA controls the stapler stacker by sending signals to the stapler/stacker PCA. The stapler/stacker PCA controls the stapler/stacker motor, solenoids, sensors, and the stapler unit. When the printer power is turned on, the printer low-voltage supply circuit supplies dc power to the stapler/stacker. The stapler/stacker performs the power-on sequence and enters the standby mode.
Table 5-6 Stapler/stacker components (continued) Component Purpose Staple-presence switch (SW1102) Detects the presence of staples in the stapler cartridge Staple home-position switch (SW1103) Determines whether the stapler cam is in the home position Figure 5-22 Stapler/stacker motors, solenoids, and sensors block diagram Stacker and stapler/stacker 143
Staple-mode feed and delivery In this mode, 2 to 15 pages of media are stapled into one set and the stacks are then delivered to the delivery bin. After the leading edge of the media reaches the fuser-delivery sensor (PS108) in the printer, the dc controller PCA sends a signal to the stapler/stacker-driver PCA.
Figure 5-24 Staple-mode feed and delivery diagram (2 of 6) At a specific time after the paper-inlet sensor (PS1101) detects the leading edge of the media, the stapler/stacker PCA changes the speed of the feed motor (M1103) to synchronize the feed rollers with the speeds of the other stapler/stacker motors and rollers. The stapler/stacker PCA then activates the paddle motor (M1101) counterclockwise to again disengage the upper and lower delivery rollers. The delivery deflector returns to its normal position.
Figure 5-26 Staple-mode feed and delivery diagram (4 of 6) Stapler/stacker operation depends on whether the device detects the final page in the staple job. ■ No. The feed motor (M1101) changes speed and another page enters the stapler/stacker. The stapler/stacker-driver PCA activates the jogger motor and the jogger guide moves to align the media stack horizontally.
(M1102) to move the jogger guide into the turn-out position and allow the stack to drop into the delivery bin.
Stapler unit The major components of the stapler unit are the stapler motor (M104), the staple cartridge, the staple-detection switch, and the staple-module home-position switch. The staple cartridge holds a maximum of 1,000 staples. The stapler/stacker-driver PCA controls the stapler unit.
Stapler-unit operation The stapler unit uses the stapler unit motor (M104), staple cam, staple-press head-plates, staple arm, and support base to staple media together. Use the printer settings to turn on the staple mode (see Stapler/stacker submenu). The stapling procedure begins when media enters the staple guide and the dc controller PCA sends the end-of-job signal to the stapler/stacker-driver PCA.
As staple cam 1 rotates, it raises the staple-press head-plate 1. This forms the flat staple into a "u" shape. While this is happening, the staple arm raises the swing guide. Figure 5-33 Staple operation (2 of 3) As staple cam 2 rotates, it raises staple-press head-plate 2. This pushes the staple up and through the media.
Staple level-detection The stapler/stacker-driver PCA uses the staple-detection switch to detect the presence and number of staples in the stapler unit. A spring on the staple-detection switch holds the staple-detection flag in the raised position. When this flag is fully raised, the switch is open. A slot is cut into the bottom of the staple cartridge. If the staple cartridge is mostly full of staples, the staples block the staple-detection flag movement so that it cannot move to its raised position.
Stapler/stacker jam detection The following sensors detect the presence of media in the stapler/stacker and determine whether the media is feeding correctly or jamming. For information about the location of these sensors, see Stacker and stapler/stacker switches and sensors.
Image-formation system The image-formation system is the main system in the printer. It consists of five stages: ■ Electrostatic latent (potential) image formation During this operation, a uniform negative charge is applied to the surface of the photosensitive drum in the print cartridge. The drum is then exposed to the laser beam from the laser/scanner, which neutralizes portions of the drum to create an invisible electrostatic latent image.
Figure 5-36 Image-formation block diagram 154 5 Theory of operation
Electrostatic latent-image formation Forming the electrostatic latent image on the photosensitive drum requires applying a uniform negative charge (bias) to the surface of the drum and then the exposing it to the laser beam. The laser beam neutralizes the section of the drum that will it attract toner during the developing operation. Primary charging The conditioning process consists of the primary charging roller applying a uniform negative charge to the surface of the drum.
At the beginning of each sweep, the beams strike the beam-detect mirror and, generating the beamdetect (BD) signal. The BD signal is sent to the dc controller PCA, where it is converted to an electrical signal that synchronizes the video data output for one sweep (two scan lines) and diagnoses problems that exist in the laser diode or scanner motor. Developing the image The developing process makes the latent electrostatic image a visible image on the drum.
Transferring the image During the transferring process, the toner image on the drum surface is transferred to the print media. A positive charge that the transfer roller applies to the back of the media causes the negatively charged toner on the drum surface to be attracted to the sheet of media. The small diameter of the drum, combined with the stiffness of the paper, causes the paper to peel away from the drum.
Fusing the image The image is held in place only by electrostatic attraction when it is transferred from the drum to the media. The lightest touch will smear it. During the fusing process, heat and pressure fuse the image to the media to produce a permanent image. The media passes between a heated fusing roller and a soft pressure roller. This melts the toner and presses it into the media. This printer utilizes an on-demand fusing method.
Cleaning the transfer charging roller and photosensitive drum Residual (leftover) toner is cleaned off of the transfer charging roller and photosensitive drum so that subsequent images are crisp and clear. Because not all of the toner is attracted to the media when the image is transferred from the drum, some toner remains on the drum. Toner can also remain on the transfer roller if a jam occurs and the transfer of toner to the media is not completed.
Print-cartridge memory chip The print-cartridge memory chip is a non-volatile memory (NVRAM) device that is built into the print cartridge. It stores information about the cartridge. The dc controller PCA reads and writes memory data to the memory chip at specific times to monitor the print cartridge usage and condition. If the read-write process fails four times in a row, the dc controller PCA detects a print-cartridge memory failure and a 10.00.
Formatter system The formatter is involved in the following procedures: ■ Controlling the PowerSave/Sleep mode ■ Receiving and processing print data from the various printer I/Os ■ Monitoring control-panel functions and relaying printer-status information (through the control panel and the bidirectional I/O) ■ Developing and coordinating data placement and timing with the dc controller PCA ■ Storing font information ■ Communicating with the host computer through the bidirectional interface The f
Resolution Enhancement technology The formatter contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the dc controller PCA to produce "smoothed" line edges. The REt can be turned on or off from the control panel or from some software programs. The default setting is medium. NOTE The REt settings that are sent from software programs or printer drivers override the control-panel settings.
Expanded I/O The optional expanded I/O (EIO) card can be installed in the designated slots on the formatter. It provides automatic I/O switching between multiple computers or networks that are connected to the printer. NOTE Only one slot is available on HP LaserJet 4200L printers. Flash (HP LaserJet 4200/4300 Series printers only) Optional flash is available in 2 MB and 4 MB flash memory DIMMs for storing forms, fonts, and signatures.
store a full page of print-image data before the data is sent to the print engine. Memory capacity can be increased by adding DIMMs to the formatter. Note that adding memory (DIMMs) might also increase the print speed for complex graphics. DIMM slots The DIMM slots can be used to add memory. In HP LaserJet 4200/4300 Series printers DIMM slots can also be used to add fonts or firmware upgrades.
PML The printer management language (PML) allows remote configuration and status readback through the I/O ports. Control panel The formatter sends and receives printer status and command data to and from a control-panel PCA.
166 5 Theory of operation
6 Removing and replacing parts Chapter contents ● Removal and replacement strategy ● User-replaceable parts ● Covers, tray 1, and the rear output bin ● Control-panel display ● Main assemblies ● Motors and fans ● Pickup and feed assemblies ● Sensors and switches ● Solenoids and clutches ● Accessories Chapter contents 167
Removal and replacement strategy This chapter describes how to remove, replace, and reassemble the major assemblies of the printer. Replacement is generally the reverse of removal. To identify the left side and right side of the printer, face tray 1 on the front of the unit. WARNING! Unplug the power cord from the power outlet (at the wall receptacle) before attempting to service the product. If you do not follow this warning, severe injury can result.
Before performing service ■ If possible, print a menu map and configuration page. See Menu map and Configuration page. ■ Remove all of the accessories and print media, the print cartridge, and tray 2 from the product. ■ Unplug the power cord from the power outlet at the wall receptacle. ■ Place the product on an ESD mat, if one is available. If an ESD-protected workstation is not available, discharge body static by grasping the printer chassis before touching an ESD-sensitive component.
Screws used in the printer This table describes the screws that are used in the printer and provides guidelines to help determine where each type of screw is used. The screws can vary in length depending on the thickness of the material that is being fastened. Always note where each type of screw is located and replace each one in its original location. NOTE When you are disassembling the product, place the screws into the chassis holes from which they were removed.
Parts-removal tree Use the following diagram to determine the order in which parts must be removed. NOTE Some components in the parts-removal tree have a superscript number listed next to the component name (for example, "Right-side cover1"). The superscript indicates that this component must be removed before you can gain access to the registration-roller assembly.
Printer input tray, and cabinet wheel locks When the printer and input trays are placed on the cabinet stand, the printer and trays must be locked together to prevent them from tipping over. This is not necessary (but it is recommended) if the printer and trays are placed on a level work surface. When servicing the printer and accessories, unlatch the locking mechanism and separate the printer and its accessory components. The cabinet stand includes locks for the wheels at its base.
Dc controller PCA diagram You must disconnect wires or cables from the dc controller PCA before you can remove or replace many of the printer components. Use the following diagram to assist with disconnecting the cables and wires from the dc controller PCA.
Figure 6-2 Connector locations on the dc controller PCA 174 J71 J88 6-Pin connector; Envelope feeder J72 J89 3-Pin connector; Paper-feed clutch J73 J90 10-Pin connector; Tray 2 media size sensor, Tray 2 paper sensor J77 8-Pin connector; Control panel J91 7-Pin connector; Accessory tray power connector J78 3-Pin connector; Right side fan (HP LJ 4250/4300/4350 only) J92 2-Pin connector; Tray 2 pickup solenoid J79 2-Pin connector; Tray 1 pickup solenoid J93 2-Pin connector; Tray 2 lifter
User-replaceable parts The following sections discuss user-replaceable parts. Print cartridge 1 Open the control-panel door.
2 Firmly grasp the print cartridge and pull it up and out of the printer. CAUTION Do not expose the print cartridge to bright light or direct sunlight for long periods of time. This can damage the cartridge, which will result in print-quality defects. If the cartridge must be removed from the printer for an extended amount of time, cover it and keep it out of bright light or direct sunlight.
Transfer roller 1 Open the control-panel door and tray 1. CAUTION Do not touch the black rubber on the roller. Skin oils on the roller can cause print-quality problems. The use of disposable gloves is recommended when you remove the transfer roller. 2 Use a transfer-roller removal hook (callout 1) to lift the left end of the metal shaft out of place near the blue gear (callout 2). If a removal hook is not available use a flat-blade screwdriver. Slide the transfer roller to the left to remove it.
Fuser WARNING! The fuser might be very hot. After turning off the printer power, allow the fuser to cool for at least 30 minutes before removing it. 1 Remove the rear output bin. See Rear output bin. 2 Squeeze the blue fuser-release tabs (callout 1). 3 Pull the fuser (callout 2) straight back and out of the printer. Figure 6-6 Fuser CAUTION Do not drop or jar the fuser. It can easily be damaged if it is mishandled. Hint When you replace the fuser, make sure that it is fully seated into the printer.
Tray 1 pickup roller NOTE If the optional envelope feeder is installed, press the release button on its left side and remove the feeder. Then proceed to step 2. 1 Remove the front accessory cover (callout 1). NOTE If the printer has an envelope feeder installed, this cover will not be in place.
2 Release the pickup roller by sliding apart the latches that are located on each side at the top of the roller. Lift the roller (callout 3) out of the opening. Figure 6-8 Tray 1 pickup roller (2 of 2) Reinstallation tip When you install the pickup roller, place the two pivot pins in the lower mounting slots (callout 2) and rotate the roller into the printer until it snaps into place.
Tray 1 separation pad NOTE If the optional envelope feeder is installed, press the release button on its left side and remove the feeder. Then proceed to step 2. 1 Remove the front accessory cover (not shown). See Accessory covers and the tray 2 extension door. 2 Insert the tip of a a small flat-blade screwdriver under the tray 1 separation pad. 3 Carefully twist the screwdriver to dislodge the separation pad. Remove the tray 1 separation pad.
Tray 2 feed rollers 1 Remove tray 2 and place it on a level work surface. Locate and open the cover (arrow) that is next to the roller in tray 2.
2 Pinch the blue latch that is on the left side of the roller. Slide the roller off of the shaft (arrows). Figure 6-11 Tray 2 feed rollers (2 of 4) CAUTION When you install this roller, make sure that it locks into place. Verify that the roller is correctly oriented, and that the round, black spacer next to the roller is correctly positioned against the locking pin on the shaft. WARNING! Do not allow the front of the printer to extend beyond the edge of the work surface.
3 Move the front of the printer to the edge of the work surface for better access to the remaining feed rollers. To find the rollers, look up into the inside of the opening that was created when you removed tray 2.
4 Pinch the blue latch on the left side of the feed roller (two rollers are intslled here). Slide the roller off of the shaft. You might need to rotate the roller in order to pinch the latch. Figure 6-13 Tray 2 feed rollers (4 of 4) 5 Repeat the previous step for the remaining pickup roller. Reinstallation tip When you install each of the rollers that you removed in steps 4 and 5, make sure that it locks into place on the tabs that are on the drive gear.
Covers, tray 1, and the rear output bin The following sections describe removal and replacement of the printer covers, tray 1, and the rear output bin.
Accessory covers and the tray 2 extension door NOTE Accessory covers will not be in place if any installed accessories (for example, the optional stapler/stacker) have been removed to service the printer. 1 Grasp the rear accessory cover (the mounting position for the optional stapler/stacker or stacker). Rotate the cover toward the front of the printer to release it, and then lift it up to remove it.
2 Open tray 1. Grasp the front accessory cover (the mounting position for the optional envelope feeder) and pull it straight out of the printer.
3 Grasp the duplexing accessory cover (the mounting position for the optional duplexer) and pull it straight out of the printer. Figure 6-17 Accessory covers (3 of 3) 4 Rotate the tray 2 extension cover to the horizontal position, and then lift up the right side of the cover to unlock its pivot bar.
5 Slide the left-side pivot pin out of its retainer to remove the cover.
Formatter cover 1 Grasp the formatter cover. 2 Pull the cover straight back and away from the printer.
Top cover NOTE If the optional stapler/stacker or stacker accessory is installed, lift it straight up and off of the printer to remove it. Then proceed to step 2. 1 Remove the following: ● Top accessory cover. See Accessory covers and the tray 2 extension door. ● Formatter cover. See Formatter cover 2 Open the rear output bin, the print-cartridge door, and the front cover. 3 Use needle-nose pliers to release the print-cartridge drive-arm tab (callout 1).
4 Remove four mounting screws (callout 3).
5 Grasp the top cover and carefully rotate the left edge up and away from the printer. Do not apply stress to the control-panel wire-harness (callout 4) when rotating the top cover away from the printer. CAUTION The accessory pin (callout 5) is not captive. Do not lose the pin. Figure 6-22 Top cover (3 of 3) 6 Disconnect the control-panel wire-harness (callout 4) from the dc controller PCA. Remove the top cover.
Right-side cover 1 Remove the following assemblies: ● Top cover. See Top cover. ● Formatter cover. See Formatter cover. ● Tray 2. 2 Open the formatter door. 3 Use a small flat-blade screw driver to push in the locking tab at the front of the printer, and then release two additional locking tabs (callout 1).
4 Rotate the right-side cover away from the printer and lift it up to remove it. Figure 6-24 Right-side cover (2 of 2) Reinstallation tip When you reinstall the right-side cover, verify that the power-switch arm (callout 1) locks onto the switch connecting rod (callout 2).
Left-side cover 1 Remove the top cover. See Top cover. 2 Release two locking tabs (callout 1). Figure 6-25 Left-side cover 3 Rotate the top of the cover away from the printer and lift the cover up to remove it. Reinstallation tip When reinstalling the left-side cover, make sure to hook the bottom of the cover first.
Front cover 1 Open the front cover. 2 Remove the tray 1 pins (callout 1) from the hinges on the front cover. Use your fingers to gently pry the paper-guide slide-pin hinges out of the hinge slots on the front cover to release the pins.
3 Slide the front cover toward the right side of the printer to remove it. Figure 6-27 Front cover (2 of 2) Reinstallation tip When you reinstall the front cover, the door-stop pin must be installed in the stop receptacle on the door so that the door opens and closes correctly.
Tray 1 1 Remove the front cover. See Front cover. 2 Open tray 1. 3 Firmly pull both sides of the tray 1 sensor-arm cover down to release it from the shaft. Figure 6-28 Tray 1 (1 of 3) Reinstallation tip After reinstalling the tray 1 sensor-arm cover, verify that the sensor arms move freely. Hint Before you complete step 4, examine the position of the return-spring at the right side of the tray. The return-spring must be positioned correctly upon reinstallation.
4 While holding the return-spring (callout 1), rotate the paper guide down to release the left paperguide hinge (callout 2). Figure 6-29 Tray 1 (2 of 3) Hint Tape the return-spring in place on tray 1 so that you will not lose it.
5 Slide the paper guide to the left to remove it.
Rear output bin NOTE If the duplexer is installed, lift it up slightly and pull it away from the printer to remove it. 1 Open the rear output bin (callout 1). 2 Squeeze the hinge pin (callout 2) out of its mounting hole. Figure 6-31 Rear output bin 3 Rotate the output bin away from the printer until the right hinge pin is released, and then remove the output bin.
Control-panel display The following sections describe removing and replacing parts of the control-panel display. Control-panel overlay 1 Use a small flat-blade screwdriver to carefully pry the top of the control-panel overlay away from the printer. Figure 6-32 Control-panel overlay 2 204 Lift the overlay off of the control panel.
Control-panel assembly CAUTION The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation. CAUTION Always remove the top cover before removing the control panel. If you drop any of the control-panel mounting screws into the printer when you remove the control panel, they might be difficult to recover. Severe damage to the printer can result if the power is turned on when loose screws are inside the printer.
3 Remove four screws (callout 1), and then lift the control-panel cover (callout 2) out of the top cover. NOTE Some models have six screws.
4 Remove the grounding-strip screw (callout 3) and the spacer (callout 4).
5 Unplug the control-panel wire-harness (callout 5), gently pry the front of the print-cartridge door away from the control-panel display to release the retainer clip, and then lift the control panel (callout 6) out of the top cover. Reinstallation tip When you reinstall the control-panel display, verify that the wire-harness is placed in the cable guide under the grounding strip. Reinstallation tip When you reinstall the grounding strip (callout 5), do not forget to replace the protective clip.
Main assemblies The following sections describe the removal and repair of internal printer components.
Firmware DIMM (LJ 4200/4300 only) NOTE The HP LaserJet 4250/4350 Series printers do not use firmware DIMMs. Instead a firmware chip is soldered directly to the formatter in those printers. Firmware upgrades may be performed via an RFU, see Downloading a remote firmware update CAUTION The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation. 1 Remove the formatter cover. See Formatter cover.
Reinstallation tip The firmware DIMM must be installed in slot 1 (formatter PCA location J1; topmost slot). If you are installing additional DIMMs, the second DIMM must be installed in slot 2 (formatter location J2; second slot down from the top). If another DIMM is installed, the third DIMM must be installed in slot 3 (formatter location J3; third slot down from the top). If another DIMM is installed, the fourth DIMM must be installed in slot 4 (formatter location J4; bottom slot).
3 Slide the formatter assembly toward the rear of the printer to remove it. Figure 6-38 Formatter assembly (2 of 2) CAUTION Correct reinstallation of the formatter is critical to correct operation of the printer. If you are installing a new formatter, follow instructions in the reinstallation tips.
After installing a new formatter, complete the following steps: 1 Turn the printer on and then wait for five minutes after the printer reaches the Ready state. NOTE Five minutes is required to allow for NVRAM settings to be written. 2 Turn the printer off. 3 Turn the printer on again, and then wait five minutes after the printer reaches the Ready state. 4 Print a configuration page to verify against original settings.
Output-delivery assembly 1 2 214 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Formatter cover. See Formatter cover Use a small flat-blade screwdriver to release the locking pin on the shaft lock (callout 1), and then rotate the lock toward the rear of the printer until the inner retaining tab (gear side) aligns with the hole in the output delivery assembly frame.
3 Slide the shaft lock to the right and remove it to release the gear shaft from the output-delivery assembly (callout 2). CAUTION Do not break the shaft lock. A replacement is not provided with a new outputdelivery assembly. Figure 6-39 Output-delivery assembly (1 of 2) Hint Snap the shaft lock back into place on the assembly so that you will not lose it. Remove the shaft lock when you reinstall the output-delivery assembly.
4 Lift up the gear end of the output-delivery assembly (callout 5) slightly and slide the assembly toward the formatter assembly to remove it.
Duplexing-pendulum assembly NOTE The duplexing-pendulum assembly is part of the paper-path switching mechanism when the duplexer is installed. 1 2 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Formatter assembly. See Formatter assembly . ● Output-delivery assembly. See Output-delivery assembly . Remove two screws (callout 1).
3 Pull the duplexing-pendulum assembly toward the laser/scanner until the upper gear-drive shaft clears the hole in the chassis, and then remove the assembly. CAUTION The gears in this assembly are not captive and can easily slide off of the shafts. Handle the assembly carefully and place it gear-side-up on your workstation to prevent the gears from sliding off of the shafts.
Laser/scanner assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover 2 Unplug the laser/scanner wire-harness connector (callout 1) from the dc controller PCA (location J84; callout 1). 3 Remove the laser/scanner wire-harness from the wire guide (callout 2).
4 Remove three screws (callout 3) and their grounding clips. 3 Figure 6-44 Laser/scanner (2 of 3) Reinstallation tip The grounding clips are not captive. Make sure that you replace the grounding clips when you reinstall the laser/scanner. NOTE The HP LaserJet 4200/4300 Series printers might have fewer than three grounding clips.
5 Remove a fourth screw (callout 4), and then unplug the laser/scanner wire-harness (callout 5) from the laser/scanner PCA. 5 4 Figure 6-45 Laser/scanner (3 of 3) 6 Carefully lift the laser/scanner up and out of the printer. Make sure that the laser/scanner assembly does not catch or snag the wires along the bottom of the assembly when you remove the assembly. CAUTION When you reinstall the laser/scanner assembly, make sure that the wireharnesses are correctly routed through the cable guides.
Paper-pickup drive assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover ● Formatter. See Formatter assembly ● Tray 2 extension cover and duplexer accessory cover. See Accessory covers and the tray 2 extension door 2 Remove two screws (callout 1).
4 Lift up the power-switch connector-bar (callout 3) and swing it away from the paper-pickup gear assembly. Figure 6-47 Paper pickup-drive assembly (2 of 5) 5 Unplug the solenoid connector from the dc controller PCA (location J92). Unweave the solenoid wire-harness from the wire guide and the cable clips. Hint You might have to remove additional wire-harnesses from the wire guide to gain access to the solenoid wire-harness.
6 Remove one e-clip (callout 4) and the shaft collar (callout 5), and then push the tray drive-gear/ shaft (callout 6) into the tray 2 cavity. NOTE The large gear inside of the paper-pickup drive assembly is not captive and will slide off of the shaft and be loose inside the paper-pickup drive assembly (see Table 6-2 Tray 2 drive gear and shaft). Figure 6-48 Paper pickup-drive assembly (3 of 5) 7 224 Lift the tray drive-gear/shaft out of the tray 2 cavity.
8 Remove four screws (callout 7). Reach inside the printer and push the rear tray 2 feed roller up into its raised position (see Tray 2 feed rollers). This disengages the roller-lifting arm from the clutch gear. Figure 6-49 Paper pickup-drive assembly (4 of 5) 9 Main assemblies Rotate the top of the paper-pickup drive-gear assembly away from the printer, and then lift the assembly out of the printer.
Figure 6-50 Paper pickup-drive assembly (5 of 5) Reinstallation tip When you reinstall the tray 2 drive gears and shaft, verify that the gears are seated on the shaft-locking bars and that the shaft collars are correctly positioned in the paper-pickup drive-gear assembly mounting bracket and printer chassis.
Tray 2 lifter-drive assembly 1 2 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover ● Formatter. See Formatter assembly ● Paper-pickup drive assembly. See Paper-pickup drive assembly.
3 Unhook the tension spring (callout 3) at the lifter-drive assembly, remove one screw (callout 4), and then slide the support plate (callout 5) out of the printer.
4 Rotate the top of the lifter-drive assembly away from the printer to remove it from the printer. NOTE You might have to remove some cable guides to easily remove the lifter-driver assembly.
Dc controller PCA 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover ● Formatter. See Formatter assembly CAUTION The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation.
3 Unweave the flat cables (callout 1) and all other cables (callout 2) from the cable guide (callout 3). 2 1 3 Figure 6-54 Dc controller PCA (1 of 5) Reinstallation tip When replacing the cables to the dc controller PCA, replace the wire cables first, and then replace the flat cables.
4 Remove the two screws (callout 4) that secure the formatter connector bracket to the chassis. Unweave the formatter connector wire-harness from the cable guides (callout 5). NOTE You might have to remove additional wire-harnesses from the wire guide to gain access to the formatter-connector harness. Figure 6-55 Dc controller PCA (2 of 5) CAUTION Do not remove the screws (callout 6) on the interface connector.
5 Remove the flat cable (callout 7) from the flat-cable guide (callout 8).
6 Remove two screws (callout 9) and then lift the dc controller PCA away from the printer. 9 Figure 6-58 Dc controller PCA (5 of 5) CAUTION Correct reinstallation of the dc controller is critical to correct operation of the printer. If you are installing a new dc controller, follow the instructions in the reinstallation tips.
Reinstallation tip Dc controller reinstallation for LJ 4250/4350 only 1 After installing a new dc controller, turn the printer on and wait for five minutes after the printer reaches the Ready state. NOTE Five minutes is required to allow for NVRAM settings to be written. 2 Turn the printer off. 3 Turn the printer on again, and then wait five minutes after the printer reaches the Ready state. 4 Print a configuration page to verify against original settings.
Power supply 1 Remove the following assemblies: ● Rear output bin. See Rear output bin. ● Rear accessory cover and tray 2 extension door. See Accessory covers and the tray 2 extension door. ● Top, right-side, and left-side covers. See Top cover through Left-side cover. ● Fuser. See Fuser. ● Formatter assembly. See Formatter assembly . 2 Remove two screws (callout 1) and then slide the PCA guide (callout 2) toward the rear of the printer to remove it.
4 Remove the power-switch arm (callout 5).
5 Unplug the two power-supply flat cables and the dc controller power connector from the dc controller (locations J80, J81, and J99). Unweave the wire-harness and cables from the cable guide. Hint You might have to remove additional wire-harnesses from the cable guide to gain access to the power-supply harness. CAUTION Note the position of the flat cables and power cables through the bottom of the cable guide.
6 Remove two screws (callout 6) and then remove the fan-cover plate (callout 7).
7 Unplug the left-side fan and thermistor-sensor connectors on the power-supply PCA (callout 8), and then remove three screws (callout 9).
8 Feed the two ribbon cables and the wire-harness through the hole in the right side of the chassis under the power-supply assembly. Pull down on the power-switch connector bar to slide it out of its mounting bracket, and remove it. Figure 6-64 Power-supply assembly (6 of 7) CAUTION Make sure that the four rubber belts and plastic rollers (see Paper-feed belt assembly) remain in place. These belts and rollers can easily become dislodged and you might lose them.
9 Grasp the power-supply assembly (callout 10) and lift it up slightly. Pull it straight out of the chassis. 10 Figure 6-65 Power-supply assembly (7 of 7) Reinstallation tip When you reinstall the power supply, thread the heavy-gauge wireharness through the hole in the chassis first, and then thread the two ribbon cables through the hole. This prevents the harness and cables from crossing over each other when they are placed in the wire guide.
Paper-feed belt assembly 1 Remove the power-supply assembly. See Power supply. 2 Remove three screws (callout 1) at the back of the assembly. 1 Figure 6-66 Paper-feed belt assembly (1 of 2) CAUTION Make sure that the four rubber belts and plastic rollers remain in place. These belts and rollers can easily become dislodged and you might lose them.
3 Release the paper-feed belt assembly alignment pins (callout 2). Rotate the assembly toward the back of the power supply and remove it. 2 Figure 6-67 Paper-feed belt assembly (2 of 2) Reinstallation tip When you reinstall the paper-feed belt assembly, make sure that the alignment pins (on the power-supply side; callout 2) are correctly hooked under the support leg on the power supply.
Motors and fans This section provides instructions for removing and replacing motors and fans.
Main cooling fan (left side) 1 2 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Left-side cover. See Left-side cover. Remove two screws (callout 1), and then remove the power-supply shield (callout 2).
3 After removing the power-supply shield: ● Unplug two cables (callout 3). ● Remove one screw (callout 4). ● Slide the thermistor sensor bar (callout 5) to the right to release it, and then lift the thermistor sensor bar away from the printer. ● Release the two fan-locking tabs, and then slide the fan out of its mounting bracket. 5 4 3 Figure 6-70 Main cooling fan (2 of 2) Reinstallation tip When you reinstall the fan, the air must flow into the printer.
Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only) NOTE This fan is not installed in HP LaserJet 4200/4200L Series printers. To remove the fan from the air duct, complete the following steps. To remove the fan and the air duct together, see Removing the fan and the air duct together. Removing the fan without removing the air duct 1 248 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover.
4 Unweave the cable from the cable guide (callout 3). Hint You might have to unplug connectors or release some wire-harness retainer clips to provide enough slack in the fan cable to remove it from the cable guide.
5 Release the two retaining tabs one at a time (callout 4) and pull the fan out of the duct bracket by rocking it from side to side until it comes free. 4 Figure 6-72 Cooling fan (HP LaserJet 4250/4300/4350 series only; 2 of 2) Reinstallation tip When you reinstall the fan, the air must flow into the printer. Verify that the airflow arrows that are embossed on the fan body point into the printer. Verify that each harness connector on the dc controller PCA is fully seated.
Removing the fan and the air duct together 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover 2 Gently pry back the two retaining tabs (callout 1) and slip the anti-static bar (callout 2) off of them. Rotate the anti-static bar away from the printer remove it from the printer.
6 Lift the fan duct (callout 5) while rotating the top of the fan duct away from the printer to remove it. 5 Figure 6-74 Cooling fan and air duct (HP LaserJet 4250/4300/4350 series only; 2 of 2) Reinstallation tip When you reinstall the fan, the air must flow into the printer. Verify that the airflow arrows that are embossed on the fan body point into the printer. Verify that each harness connector on the dc controller PCA is fully seated.
Print-cartridge motor (HP LaserJet 4250/4300/4350 series printer only) NOTE This motor is not installed on the HP LaserJet 4200/4200L Series printers. 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover 2 Gently pry back the two retaining tabs (callout 1) and slip the anti-static bar (callout 2) off of them.
4 Support the motor (callout 4) while removing three screws (callout 5), and then lift the motor away from the printer. NOTE If the mechanism includes a toroid, remove the toroid from its retainer clip before removing the print-cartridge motor.
Main motor 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover 2 Unplug two flat cables (callout 1) and the main motor-harness connector from the dc controller PCA (locations J80, J81, and J98). 3 Remove the cables from the cable guide (callout 2).
4 Support the main motor (callout 3) while removing three screws (callout 4), and then lift the motor away from the printer.
Pickup and feed assemblies Tray 1 paper-pickup assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door. ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter cover. See Formatter cover ● Left-side cover. See Left-side cover. ● Tray 1. See Tray 1. 2 Gently pry back the two retaining tabs (callout 1) and slip the anti-static bar (callout 2) off of them.
4 Remove three screws (callout 4). 5 Press the upper retainer tab (callout 5) to release the assembly. 6 Lift up the cover to release the lower retaining tab and remove the cover.
7 Unplug the pickup-sensor connector (callout 6), and then remove six screws (callout 7).. 7 8 6 Figure 6-80 Tray 1 pickup assembly (3 of 4) Reinstallation tip One of the screws on the left side (callout 7 in Figure 6-80 Tray 1 pickup assembly (3 of 4)) is longer than the other screws. Make sure that this screw is replaced in the hole from which is was removed. CAUTION Carefully thread the solenoid wire-harness through the hole in the chassis.
8 Rotate the left side of the assembly away from the chassis, and then slide the assembly to the left to remove it. Carefully feed the pickup-assembly-solenoid wire-harness through the opening in the chassis as you remove the assembly. Figure 6-81 Tray 1 pickup assembly (4 of 4) Reinstallation tip Reroute the solenoid wire-harness through the opening in the chassis.
Paper-feed assembly 1 2 Remove the following assemblies: ● Tray 1. See Tray 1. ● Tray 1 pickup assembly. See Tray 1 paper-pickup assembly . Unplug the paper-feed assembly wire-harness connector from the dc controller PCA (location J89), and then unweave the wire-harness from the cable guide. Hint You might have to remove additional wire-harnesses from the wire guides to gain access to the paper-feed assembly wire-harness.
Reinstallation notes for the paper-feed assembly Make sure that the clutch tab on the right side of the paper-feed assembly is inserted into the hole in the plastic frame. Make sure that the wire-harnesses are fed through the hole in the plastic frame. When the paper-feed assembly is installed, the sensor-flag spring must be correctly positioned so that the flag can operate. If a paper-jam error message (13.20.
Main drive assembly 1 2 Remove the following assemblies: ● Top and right-side covers. See Top cover and Right-side cover. ● Right-side fan and fan duct (HP LaserJet 4250/4300/4350 Series printers only). See Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only). ● Print-cartridge motor (HP LaserJet 4250/4300/4350 Series printers only). See steps 1 through 6 of Print-cartridge motor (HP LaserJet 4250/4300/4350 series printer only). ● Main motor.
3 Use a flat-blade screwdriver to release the flat-cable-guide tab (callout 2), and then slide the guide upward to remove it.
4 Use needle-nose pliers to release the lifting-assembly spring (callout 3), lift up the power switch rod and rotate it away from the chassis, and then remove five screws (callout 4). 4 3 Figure 6-87 Main drive assembly (3 of 3) 5 Grasp the main drive assembly and gently slide it straight away from the printer.
Registration assembly 1 Remove the following items: ● Main drive assembly. See Main drive assembly. ● Tray 1 paper-pickup assembly. See Tray 1 paper-pickup assembly . 2 Remove one e-clip retainer (callout 1), and then slide the registration-roller drive gear (callout 2) off of the shaft. 3 Remove one screw (callout 3).
4 Use the green handle (located at the right edge of the registration plate) to raise the registrationroller plate, and then remove five screws (callout 4). NOTE Do not remove the screw shown in callout 5. Figure 6-89 Registration assembly (2 of 2) 5 Lift the registration assembly out of the printer.
Sensors and switches This section provides instructions for removing and replacing FRU sensors and switches.
Tray 2/500-sheet feeder media-size sensor (PS101) Tray 2 and the 500-sheet feeder each contain a media-size sensor. Tray 2 media-size sensor (PS101) 1 Remove the following assemblies: ● Top cover. See Top cover. ● Right-side cover. See Right-side cover. ● Formatter assembly. See Formatter assembly . 2 Unplug the sensor cable (callout 1). 3 Remove two screws (callout 2). 4 Press the locking tab (callout 3), and then slide the sensor toward the front of the printer to release it.
500-sheet feeder media-size sensor 1 Remove the 500-sheet feeder right-side cover. See 500-sheet feeder right-side cover 2 Remove the 500-sheet feeder PCA. See 500-sheet feeder control PCA. 3 Remove two screws (callout 1). 4 Push the locking tab (callout 2) and slide the sensor toward the front of the feeder to release it.
5 Lift the sensor out of the 500-sheet feeder. Figure 6-93 500-sheet feeder media-size sensor (2 of 2) NOTE When you install the media-size sensor, verify that the locator pins are correctly positioned in the corresponding holes in the chassis.
Tray 1 paper sensor (PS105) 1 Remove the tray 1 pickup assembly. See Tray 1 paper-pickup assembly 2 Remove the grounding plate (callout 1). 3 Lift the tray 1 paper sensor (callout 2) away from the printer.
Door switch (SW101) 1 Remove the inner-front right cover according to the tray 1 paper-pickup assembly removal procedures. See Tray 1 paper-pickup assembly . 2 Release two tabs (callout 1) that secure the door switch (callout 2). 1 2 Figure 6-95 Door switch 3 Lift the door switch out of the cover.
Solenoids and clutches This section provides instructions for removing and replacing orderable solenoids and clutches.
Tray 2 pickup solenoid (SL101) 1 Remove the paper-pickup drive assembly. See Paper-pickup drive assembly 2 Remove one screw (callout 1) that secures the tray 2 pickup solenoid (callout 2) to the paperpickup drive assembly. Figure 6-96 Tray 2 pickup solenoid 3 Lift tray 2 pickup solenoid off of the paper-pickup drive assembly.
Tray 1 pickup solenoid (SL102) 1 Remove the tray 1 paper-pickup assembly. See Tray 1 paper-pickup assembly 2 Remove one screw (callout 1) that secures the tray 1 pickup solenoid (callout 2) to the tray 1 paper-pickup assembly. Figure 6-97 Tray 1 pickup solenoid 3 276 Lift the tray 1 pickup solenoid off of the tray 1 paper-pickup assembly.
Feed-roller clutch (CL101) 1 Remove the paper-feed assembly. See Paper-feed assembly 2 Remove one e-ring (callout 1) and slide the gear (callout 2) off of the shaft. 3 Slide the feed-roller clutch (callout 3) off of the shaft.
Accessories The following sections describe the printer accessories. 500-sheet feeder assembly The following sections describe the parts of the 500-sheet feeder assembly. 500-sheet feed rollers NOTE The removal procedure for the two feed rollers in the 500-sheet feeder is the same as the procedure for the tray 2 feed rollers. See Tray 2 feed rollers. 500-sheet feeder right-side cover 1 Remove two screws (callout 1) and the front cover (callout 2).
2 Use a flat-blade screwdriver to release the right-side cover front locking tab. Figure 6-100 500-sheet feeder right-side cover (2 of 5) 3 Depress the edge of the cover and release the three center locking tabs.
4 Use flat-blade screwdriver to release the rear locking tab. Figure 6-102 500-sheet feeder right-side cover (4 of 5) 5 Rotate the top of the cover away from the tray assembly and lift it up to remove it.
500-sheet feeder control PCA CAUTION The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation. If an ESD-protected workstation is not available, discharge body static by grasping the 500-sheet feeder chassis before touching an ESD-sensitive component. Ground the 500-sheet feeder chassis before servicing the product. 1 Remove the 500-sheet feeder right-side cover. See 500-sheet feeder right-side cover.
500-sheet feeder lifter-drive assembly 1 Remove the 500-sheet feeder right-side cover. See 500-sheet feeder right-side cover. 2 Unplug the lifter-drive harness connector from the assembly PCA (location J803; callout 1). Disconnect the tension spring (callout 2) and remove one screw (callout 3). 1 2 3 Figure 6-105 500-sheet feeder lifter-drive assembly (1 of 2) 3 Pull the tray lifter-drive assembly out towards the right side of the chassis until its pivot shaft clears the tray guide.
500-sheet feeder paper-pickup drive assembly 1 2 Remove the following assemblies: ● 500-sheet feeder right-side cover. See 500-sheet feeder right-side cover. ● 500-sheet feeder tray lifter-drive assembly. See 500-sheet feeder lifter-drive assembly. Unplug the main drive solenoid harness connector (callout 1) from the PCA (location J802). Remove the harness from the harness clip (callout 2).
3 Remove two screws (callout 3). Remove the tray-number indicator. 3 Figure 6-108 500-sheet feeder paper-pickup drive assembly (2 of 7) 4 Unplug the accessory-connector wire-harness from the PCA (callout 4).
5 Remove 8 screws (callouts 5, 6, and 7). Remove the chassis gutter (callout 8). 5 6 7 8 Figure 6-110 500-sheet feeder paper-pickup drive assembly (4 of 7) 6 Remove one e-clip and the shaft collar (callout 9).
7 Push the shaft into the paper-pickup drive assembly. Grasp the tray drive gear inside the tray cavity and pull the gear and shaft assembly out of the paper-pickup gear assembly. Figure 6-112 500-sheet feeder paper-pickup drive assembly (6 of 7) CAUTION Some gears are not captive when the paper-pickup assembly is removed. Be careful not to lose these unattached parts. Also, the solenoid is not captive when the paper-pickup assembly is removed.
8 Remove five screws (callout 10). Pull the paper-pickup gear assembly away from the chassis and remove it. 10 Figure 6-113 500-sheet feeder paper-pickup drive assembly (7 of 7) NOTE When you install the tray drive gears and shaft, verify that the gears are seated on the shaft locking bars and that the shaft collars are positioned correctly in the lowergear assembly mounting bracket and 500-sheet feeder chassis.
1,500-sheet feeder assembly The following sections describe the parts of the 1,500-sheet feeder assembly. 1,500-sheet feeder feed rollers NOTE The removal procedure for the two feed rollers in the 1,500-sheet feeder is the same as the procedure for the tray 2 feed rollers. See Tray 2 feed rollers. 1,500-sheet feeder separation roller 1 Open the 1,500-sheet feeder door. Open the feed-roller cover.
2 Pinch the blue latch that is on the side of the feed roller and slide the roller off of the shaft. 2 1 Figure 6-116 1,500-sheet feeder roller (2 of 2) Reinstallation tip This roller must lock into place. Verify that the roller is seated on the locking bars that are located on the round black spacer and that the spacer is seated on the shaft-locking pin (callouts 1 and 2).
1,500-sheet feeder door 1 Remove one screw (callout 1) and remove the door-stop plate (callout 2). 1 2 Figure 6-117 1,500-sheet feeder door (1 of 3) 2 Open the 1,500-sheet feeder door about halfway. Gently pry open the door slide-bar slot and disengage the door slide-bar from the feeder.
3 Lift the door straight up and off of the door hinge pins. 3 Figure 6-119 1,500-sheet feeder door (3 of 3) NOTE The door hinge pins are not captive when the door is removed. If the feeder must be turned on its side or placed upside down, remove the hinge pins and the door spring (callout 2). Place the pins and the spring where you will not lose them. 1,500-sheet feeder rear cover 1 Locate the upper rear-cover locking tabs (callout 1) on each side of the rear cover.
2 Rotate the top of the cover away from the feeder. Lift up on the cover to release it. Figure 6-121 1,500-sheet feeder rear cover (2 of 2) 1,500-sheet feeder right-side cover 1 2 Remove the following assemblies: ● Door. See 1,500-sheet feeder door. ● Rear cover. See 1,500-sheet feeder rear cover. Remove one screw (callout 1).
3 Use a flat-blade screwdriver to release the cover-locking tab (on the door-hinge side; callout 2). 2 Figure 6-123 1,500-sheet feeder right-side cover (2 of 3) 4 Rotate the top of the cover away from the chassis and then lift it up and remove it.
1,500-sheet feeder control PCA 1 2 Remove the following assemblies: ● Door. See 1,500-sheet feeder door. ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder rightside cover. Unplug six wire-harness connectors (callout 1).
3 Remove two screws (callout 2). Use needle-nose pliers to squeeze the top of one of the nylon PCA tabs (callout 3). Gently pop the PCA off of the tab. Repeat the procedure on the remaining tab. Remove the PCA.
1,500-sheet feeder media-size sensor 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door. ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder rightside cover. 2 Unplug the sensor wire-harness at the sensor (callout 1). 3 Remove one screw (callout 2). 4 Remove the sensor. CAUTION Two plastic locator pins are on the back of the sensor. Be careful not to break them when you remove the sensor.
1,500-sheet feeder lifter-drive assembly 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door. ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder rightside cover. 2 Unplug the lifter-drive harness connector from the PCA (location J1003; callout 1). 3 Unplug the lifter-drive sensor-harness from the sensor (callout 2) and remove the sensor harness from the wire clip (callout 3).
4 Remove seven screws (callout 4) and then remove the bracket (callout 5). Slide the spring-gear assembly (callout 6) away from the chassis until the gear shaft clears the hole in the chassis, and then slide the assembly towards the rear of the feeder to remove it. 6 4 5 Figure 6-129 1,500-sheet feeder lifter-drive assembly (2 of 4) 5 Release the lifter-gear shaft-collar locking pin and rotate the collar until the inner locking tabs align with the corresponding holes in the bracket.
6 Slide the lifter-drive assembly away from the chassis until the lifter-drive gear-shaft clears the corresponding hole in the bracket. Remove the assembly.
1,500-sheet feeder paper-pickup drive assembly 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door. ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder rightside cover. 2 Unplug the paper-pickup drive-solenoid harness connector from the assembly PCA (location J1005; callout 1). Remove four screws (callout 2).
7 Troubleshooting Chapter contents ● Introduction ● Troubleshooting process ● Troubleshooting tools ● Control-panel menus ● Printer resets and power-on modes ● Test pages ● Interface troubleshooting ● Display-message troubleshooting ● Paper-path troubleshooting ● Media transport problems ● Image-formation troubleshooting ● Troubleshooting the stacker and the stapler/stacker ● Printer-component locations ● Accessory component locations ● Printer and accessory wiring diagrams ●
Introduction In order to use the information in this chapter, you should have a basic understanding of the laserjet printing process. Explanations of each mechanical assembly, the printer systems, and the basic theory of operation are contained in chapter 5 of this manual. Do not perform any of these troubleshooting processes unless you understand the function of each printer component.
Troubleshooting process When the printer malfunctions or encounters an unexpected situation, information on the printer control panel alerts you to the situation. This section contains an initial troubleshooting checklist that helps to eliminate many possible causes of the problem. The subsequent troubleshooting flowchart helps you to diagnose the cause of the problem. The remainder of the chapter provides steps for correcting the problems that have been identified.
Table 7-1 Initial troubleshooting checklist (continued) ■ Is the media stored correctly and within environmental limits? ■ Is the correct side of the page printed on first? ■ Is long-grain paper being used? ■ Is the correct amount of media loaded in the tray (not stacked above the arrows embossed in the tray)? ■ Is the media placed in the tray correctly? ■ Are the paper guides aligned with the stack? ■ Is the tray cassette installed correctly in the printer? Print cartridge ■ Is the print ca
Troubleshooting flowchart The flowchart highlights the general processes that you can use to isolate and solve printer hardware problems quickly. Each heading depicts a major troubleshooting step. Proceed to the next major step or perform additional testing depending on "yes" or "no" answers. Figure 7-1 Troubleshooting flowchart 1 When you perform a test print, select the same input tray and delivery method that were used when the malfunction occurred.
Power-on checks The basic printer functions should start up as soon as the printer is plugged into an electrical receptacle and the power switch is pushed to the on position. Overview Turn on the printer power. If the control-panel display remains blank, random patterns appear, or asterisks remain on the display, perform power-on checks to locate the cause of the problem. During normal printer operation, the main cooling fan begins to spin briefly after the printer power is turned on.
NOTE It is important to have the printer control panel functional as soon as possible in the troubleshooting process so that the control-panel display can be used to help locate printer errors. If problems with the power-on check perisist refer to table Table 7-2 Power-on defect or blank display. Table 7-2 Power-on defect or blank display Problem Action The power cord is not plugged into the wall receptacle and connected to the printer.
Table 7-2 Power-on defect or blank display (continued) Problem Action 3 Replace the power-supply assembly. See Power supply. 4 Replace the dc controller. See Dc controller PCA. Note: The fan only operates during the initial startup and while printing, and when the temperature inside the printer is too high. If the temperature is too high, the fan turns on to cool the inside of the printer. The fan works, but the control-panel display is blank. 1 Print an engine test. Engine-test page.
Troubleshooting tools Press (SELECT button) or the MENU button to open the menus. Use (UP ARROW button) or (DOWN ARROW button) to scroll through the menus that appear. For more information about control-panel menus, see Control-panel menus.
Information pages 1 Press (SELECT button) or the MENU button to open the menus. 2 Press (DOWN ARROW button) to scroll to INFORMATION. 3 Press to select INFORMATION. 4 Press to scroll to a listed information page. The following pages are available: 5 ● Menu map ● Usage page ● Configuration ● PCL font list ● Supplies status ● PS font list ● File directory Press to select and print the selected information page.
Menu map Use the menu map to help navigate the printer submenus and select configuration settings. Printing a menu map is very helpful when you are changing numerous printer settings. 1 Press 2 Use . (UP ARROW button) or 3 Use or (SELECT button) or the MENU button to open the menus. (DOWN ARROW button) to scroll to INFORMATION, and then press to scroll to MENU MAP, and then press .
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), trays, and printer languages. The content of the configuration page varies, depending on the options currently installed in the printer. To decode the service identification information on the configuration page, see Converting the Service ID to an actual date.
4 Memory Lists the printer memory and I/O buffering and resource saving information 5 Security Lists the status of the control-panel lock, control-panel password, and any disk drives 6 Paper trays and options Lists the size and type settings for all trays and lists optional paper-handling accessories that are installed Troubleshooting tools 313
Supplies status page Use the supplies status page to obtain information about the print cartridge that is installed in the printer, the amount of life left in the print cartridge, and the number of pages and jobs that have been processed. The page also lets you know when you should perform the next preventive maintenance. 1 Press 2 Use . (UP ARROW button) or 3 Use or (SELECT button) or the MENU button to open the menus.
Embedded Web server When the printer is directly connected to a computer, the embedded Web server is supported for Windows 95 and later. In order to use the embedded Web server with a direct connection, you must select the Custom installation option when you install the printer driver. Select the option to load Printer Status and Alerts. The proxy server is installed as part of the Printer Status and Alerts software.
■ Supplies Status. Shows the life that remains in HP supplies (0% represents that a supply is empty). This page also provides supplies part numbers. To order new supplies, click Order Supplies in the Other Links area on the left side of the window. To visit this or any Web site, you must have Internet access. ■ Event log. Shows a list of all printer events and errors. ■ Usage page.
Other links This section of the embedded Web server contains links that connect you to the Internet. You must have Internet access in order to use any of these links. If you use a dial-up connection and did not connect when you first opened the embedded Web server, you must connect before you can visit these Web sites. Connecting to the Internet might require that you close your Web browser and reopen it. ■ HP Instant Support connects to the HP Web site to help you find solutions.
To select status messages 1 Open Printer Status and Alerts in one of these ways: ● Double-click the Printer Status and Alerts tray icon, which is near the clock in the Tray Manager. ● On the Start menu, click Programs, click Printer Status and Alerts, and then click Printer Status and Alerts. 2 Click the Options icon on the left side of the window. 3 In the For field, select the printer driver for this printer, or select All Printers.
Control-panel menus Use the control-panel menus to control various printer functions. For example, you can use the RESETS submenu to quickly reset and restore most of the factory default printer settings. Not all of the available menus are described in this manual. For more information about control-panel menus, see Control-panel menus. Using control-panel menus 1 Press 2 Use ( UP ARROW button) or then press . 3 Some menus might have several submenus. Use want, and then press .
Resets submenu To find the RESETS submenu, use the control panel to open the CONFIGURE DEVICE menu (see Using the control panel. Items on the Resets submenu are used to return settings to the defaults and to change settings such as PowerSave/Sleep. The following section lists the settings and their possible values in the RESETS submenu. The default value for each setting is the one that has an asterisk (*) next to it.
Diagnostics menu Administrators can use this menu to isolate parts and to troubleshoot jam and print-quality issues. The following section lists the settings and their possible values in the DIAGNOSTICS menu. The default value for each setting is the one that has an asterisk (*) next to it. Table 7-4 Diagnostics menu Item Values Explanation PRINT EVENT LOG No values available Press (SELECT button) to generate a list of the 50 most recent entries in the event log.
Table 7-4 Diagnostics menu (continued) Item Values Explanation ■ Determine whether or not the paper goes through the duplexer during the paper path test. This item is available only if the duplexer is installed. ■ 322 DUPLEX ■ *OFF ■ ON COPIES ■ *1 ■ 10 ■ 50 ■ 100 ■ 500 Set how many sheets of paper are used from each tray during the paperpath test. If you are testing the stapling function of the optional stapler/stacker (DESTINATION item OPTIONAL BIN 1), you must select 10 copies.
Service menu (service PIN codes) Authorized HP service technicians can use this menu to gain access to printer settings that are reserved for service personnel. The service menu is protected by use of a personal identification number (PIN). When you select SERVICE from the list of menus, you are prompted to type an eightdigit PIN code. NOTE The printer automatically exits the service menu after about one minute if no menu items are selected or changed.
Service ID When printing from an HP LaserJet 4200 and 4300 Series printer this information appears on the configuration page (see Configuration page), which eliminates the need for customers to keep paper receipts for proof of the warranty. Because the printer does not have an internal clock, the availability of the service ID date depends on the printer being connected to a source that can provide the date, in this case a time server on the same network as the printer.
Printer resets and power-on modes The following sections describe the types of printer resets and power-on modes. Cold reset A cold reset unlocks menus that have been previously locked and returns all of the control panel menu items (including EIO settings) to the factory defaults. However, it does not clear the values in the service menu (such as the serial number and page counts). NOTE Before performing a cold reset, print a menu map and a configuration page (see Menu map and Configuration page).
NVRAM initialization CAUTION Initializing the NVRAM resets the serial number, the event log, the page counts, the EIO card, and the embedded print server. Initializing the NVRAM also resets service-menu values to factory defaults. Use the service menu to restore the serial number and page counts. Also reconfigure any computers that print to this printer so that the computers can recognize the printer. Initialize the NVRAM only when absolutely necessary.
Hard-disk initialization CAUTION A hard-disk initialization erases and reformats the printer hard disk. Perform a hard-disk initialization only if an error code on the control panel indicates an EIO disk error. Always try initializing the hard disk before replacing it. NOTE Before performing a hard-disk initialization, print a menu map and a configuration page (see Menu map and Configuration page).
Power-on bypass When the power is turned on the printer begins the power-on sequence. By performing a power-on bypass, you can cause the printer to resume the power-on sequence but not to recognize any installed EIO hard disk (skip-disk load procedure). This can be helpful in isolating EIO hard-disk errors.
Test pages Printing test pages helps you determine whether or not the printer engine and the formatter are functioning. Engine-test page To verify that the printer engine (all printer components except the formatter, formatter DIMMs, EIO products, and the stacker or stapler/stacker) is functioning, print an engine-test page. Use a small, non-metallic, pointed object to depress the test-page switch, which is located on the right side of the printer (callout 1).
Formatter test page To verify that the formatter is functioning, print a configuration. 330 1 Press ( SELECT button) or the MENU button to open the menus. 2 Press ( DOWN ARROW button) to scroll to INFORMATION. 3 Press to select INFORMATION. 4 Press to scroll to PRINT CONFIGURATION. 5 Press to select PRINT CONFIGURATION.
Interface troubleshooting The following sections provide instructions for interface troubleshooting. Communications checks NOTE Communication problems are normally the customer's responsibility. Time spent attempting to resolve these problems might not be covered by the Hewlett-Packard product warranty. Refer the customer to the network administrator for assistance in troubleshooting network problems. If the printer is not connected directly to a Windows or MS-DOS-based host, see EIO troubleshooting.
Jetdirect page/Embedded Jetdirect page (HP LaserJet 4250/4350 Series printers) hp LaserJet 4250/4350 series 1 1 2 5 6 3 7 4 8 Figure 7-6 Jetdirect page/Embedded Jetdirect page (HP LaserJet 4250/4350 Series printers) 332 1 HP Jetdirect Configuration indicates I/O card status status, model number, hardware firmware version, port select, port configuration, auto negotiation, manufacturing identification, and manufactured date.
Display-message troubleshooting The following tables explain the messages that might appear on the control-panel display or in the event log. Alphabetical printer messages and their meanings are listed in Alphabetical printer messages, and numerical printer messages are listed in Numerical printer messages. NOTE Not all messages are described in the tables; the messages that are not listed are self-explanatory. Status messages Status messages reflect the current state of the printer.
Alphabetical printer messages Table 7-6 Alphabetical printer messages Control panel message Description Recommended action Access denied An attempt has been made to modify a printer menu item, but the network systems administrator has enabled the control-panel security mechanism. The message will disappear shortly, and the printer will return to the ready state. Contact the network system administrator to change settings. The duplexer is not functioning. 1 Turn off the printer.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action CHOSEN PERSONALITY The printer job language (PJL) encountered a request for a personality that did not exist in the printer. The job is aborted and no pages print. 1 Press ( HELP button) for detailed information. 2 Press ( UP ARROW button) and (DOWN ARROW button) to step through the instructions. The top cover is open or the top-cover switch (SW101) is defective.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action The printer received a PJL file system command that attempted to store something on the file system. The attempt was unsuccessful because the file system is full. 1 Use the device storage manager in the HP Web Jetadmin software to delete files from the EIO disk drive and then try again.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action FLASH FILE The printer received a PJL file system command that attempted to perform an illogical operation (for example, a command to download a file to a non-existent directory). 1 Printing can continue. 2 Turn the printer off and then on to delete the message from the display. 3 If the message reappears, a problem might exist with the software program.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action 5 If the tray settings on the configuration page are correct, verify that the tray paper-out sensor is operating. See Printer switches and sensors, 500sheet feeder switches, sensors, solenoids, and PCAs or 1,500-sheet feeder switches, sensors, solenoids, and PCAs. 1 Insert the cartridge, or make sure that the cartridge is fully seated.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action LOAD TRAY XX Tray XX is either empty (based on the operation of the paper sensor) or configured for a type and size other than that specified in the job. 1 Press ( HELP button) for detailed information. 2 Press ( UP ARROW button) and (DOWN ARROW button) to step through the instructions. 3 Print a configuration page and verify that the tray settings are correctly set. See Configuration page.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action MANUALLY FEED configuration page (see Configuration page) to see if the printer tray setting differs from the paper size and type in the tray. To continue press NON HP CARTRIDGE DETECTED The printer has detected that a nonHP print cartridge is currently installed. 4 Check the tray size sensor switches if the configuration page indicates a different size than that in the tray.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action NOTE Printer repairs that are required as a result of using nonHP print cartridges are not covered under the HP warranty. OUTPUT BIN 1 FULL Remove all paper The stacker or stapler/stacker output bin is full and must be emptied in order to continue printing. 1 Remove the media from the output bin.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description RAM DISK FILE The printer received a PJL file system 1 command that attempted to perform an illogical operation (for example, a command 2 to download a file to a nonexistent directory). OPERATION FAILED alternates with Recommended action Printing can continue. Turn the printer off and then on to delete the message from the display. 3 If this error persists, a problem might exist with the software program.
Table 7-6 Alphabetical printer messages (continued) Control panel message Resend Description Recommended action 3 Press (UP ARROW button) and (DOWN ARROW button) to step through the instructions. 4 Supplies-ordering information is also available from the embedded Web server. 5 If this error persists, replace the powersupply assembly. See Power supply. The firmware upgrade was not completed successfully. Attempt the upgrade again.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action STAPLER LOW ON STAPLES Fewer than 70 staples remain in the optional stapler/stacker staple cartridge. Printing will continue until the STAPLER OUT OF STAPLES message appears on the printer control-panel display. 1 Press ( HELP button) for detailed information. 2 Press ( UP ARROW button) and (DOWN ARROW button) to step through the instructions.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action TRAY XX EMPTY The specified tray is empty, but the current job does not require this tray in order to print correctly. 1 Refill the indicated tray. 2 If the error persists, verify that the paper-out sensor (PS105,PS101, PS801, or SR3) for the indicated tray is functioning correctly.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action TRAY XX The printer is reporting the current configuration of tray XX. The tray switch is in the Standard position. 1 To change the media type, press (SELECT button). Use (UP ARROW button) and (DOWN ARROW button) to to scroll to the type, and then press select it.
Table 7-6 Alphabetical printer messages (continued) Control panel message Description Recommended action Unable to store job A job cannot be stored because of a memory, disk, or configuration problem. 1 Install additional memory in the printer, or install a disk drive in the printer. See Firmware DIMM (LJ 4200/4300 only). 2 If a disk drive is installed, delete the previously stored print jobs to increase the disk storage space.
Numerical printer messages When resolving printer messages, perform all listed actions in the order until the message is resolved. Numerical printer messages Table 7-7 Numerical printer messages Control panel message Description Recommended action 10.XX.YY SUPPLY10.XX.YY SUPPLY The printer canot read the electronic information (e-label) on the print cartridge in order to keep track of the page count for the print cartridge. 1 Open the top cover, remove the print cartridge, and then reinstall it.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action the print cartridge opens as you insert the cartridge. Replace any defective print cartridge. 4 For information about how to resolve a jam, see the specific numerical error codes in this table. 5 See Paper-path troubleshooting in this chapter. 13.01.00. or 13.03.00JAM IN TRAY x A page is jammed in tray X. 1 For help press A 13.01.
Table 7-7 Numerical printer messages (continued) Control panel message Description 4 Replace the paper-feed assembly. See Paper-feed assembly. 5 Verify that the top-of-page sensor (PS103) is operating correctly and that the sensor flag can freely move. Replace the sensor if it is not operating correctly. See Printer switches and sensors. 6 Replace the dc controller PCA. See Dc controller PCA. A jam exists in the top-cover area. 1 A 13.02.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action verify that the sensor arms move freely. (See Printer switches and sensors.) 13.12.07 jam in stapler A jam exists in the staple cartridge (the stapler did not finish stapling but was able to return to its home position). NOTE: The stapler/stacker LED blinks in amber (this error applies to the stapler/ stacker only).
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action 3 Remove all of the pages from the output bin. 4 Open the jam-access door and remove all of the pages. Close the access door. 5 If this error message persists, replace the stapler/stacker. 1 Press ( HELP button) for detailed information. 2 Press ( UP ARROW button) and (DOWN ARROW button) to step through the instructions. 3 Open the jam-access door and remove all of the pages.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action 13.13.00 A page is jammed inside of the duplexer. 1 Press ( HELP button) for detailed information about clearing the jam. 2 Press ( UP ARROW button) and (DOWN ARROW button) to step through the instructions. 3 Check the inside of the duplexer for scraps of media that might have been torn off when a jam was cleared. 4 Turn the power off. Remove the duplexer and turn the power on.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action 21 PAGE TOO COMPLEX The printer cannot process the page quickly enough. 1 ( SELECT button) to process Press the page. For help press NOTE occur. alternates with 21 PAGE TOO COMPLEX A loss of data will 2 Make the page contents less complex and re-send the print job. 1 ( SELECT button) to resume Press printing.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action 41.3 UNEXPECTED The media that is loaded is longer or shorter in the feed direction than the size that is configured for the tray. 1 If the incorrect size was selected, cancel the job or press ( HELP button) to gain access to help. 2 Press ( UP ARROW button) and (DOWN ARROW button to step through the instructions.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action appears only with a certain software program or print job, contact the software vendor for assistance. 49.XXXX PRINTER ERROR To continue turn off then on A critical firmware error has occurred that caused the processor on the formatter to abort the operation. This type of error can be caused by invalid print commands, corrupt data, or invalid operations.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action 50.X FUSER ERROR A fuser error has occurred. 1 Turn the printer off and allow it to cool down. X Description 2 Verify that the correct model of fuser is installed. 3 Verify that the correct voltage fuser is installed. 4 Reinstall the fuser, and check the connection between the fuser and the printer. Replace the connector if it is damaged. 5 Replace the fuser.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action Y Device Location 1 DIMM Slot 1 2 DIMM Slot 2 3 DIMM Slot 3 4 DIMM Slot 4 ZZ Error Number 0 unsupported memory 1 unrecognized memory 2 unsupported memory size 3 failed RAM test 4 exceeded maximum RAM size 6 invalid DIMM speed 54.1 The print cartridge was installed with the sealing tape in place. 1 Remove the sealing tape from the print cartridge. 2 Replace the print cartridge.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action PRINTER ERROR X Description 57.3 Cartridge fan error (F2) To continue turn off then on 3 Cooling fan, right side (LJ 4250/4300/4350 only) 1 or Reconnect the connector between the fan and the dc controller PCA (location J78). 4 Main cooling fan, left side 2 Replace the fan. See Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only). 3 Replace the dc controller PCA.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action 59.XY A printer-motor error has occurred. 59.00, 59.10, 59.20 Motor failure PRINTER ERROR 1 Turn the printer off and then on. 2 Reconnect the main-motor wireharness on the dc controller PCA (location J98) 3 Replace the main motor. See Main motor. 4 print-cartridge-motor error (LJ 4250, 4300, 4350 only) 4 Replace the dc controller PCA. See Dc controller PCA.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action 60.2 The tray 2 lifter-motor is not functioning. 1 Turn the printer off and then on. 2 If the error persists, turn the printer off. 3 Verify that the tray 2 lifter wire-harness is full seated in its connector on the dc controller PCA (location J93). 4 Replace the tray 2 lifter-driver assembly. See Tray 2 lifter-drive assembly. 5 Replace the dc controller PCA. See Dc controller PCA.
Table 7-7 Numerical printer messages (continued) Control panel message 64 Description A scan-buffer error has occurred. PRINTER ERROR Recommended action 4 Replace the formatter assembly. See Formatter assembly . 1 Turn the printer off and then on. 2 If the message persists, replace the formatter assembly. See Formatter assembly . 1 Turn the printer power off. 2 Verify that the stacker or stapler/ stacker is installed correctly. 3 Turn the printer power on.
Table 7-7 Numerical printer messages (continued) Control panel message Description Recommended action PERMANENT STORAGE ERROR 0 onboard NVRAM 5 Replace the formatter assembly. See Formatter assembly . To continue press 1 flash DIMM or hard drive 68.X PERMANENT A nonvolatile storage device is full. (SELECT button) should clear Pressing the message. Printing can continue, but the printer might behave unexpectedly in response to the changed settings. 1 Press 2 For 68.
Table 7-7 Numerical printer messages (continued) Control panel message Description To continue turn off then on 8X.YYYY EIO ERROR 364 The EIO accessory card in slot X has encountered a critical error. Recommended action 3 Reseat the formatter. 4 Go to www.hp.com/go/lj4200_software, www.hp.com/go/lj4250_software, www.hp.com/go/lj4300_software, or www.hp.com/go/lj4350_software. Select Download Drivers and Software. Check for the latest firmware image version at the bottom of the page.
Paper-path troubleshooting The following sections describe how to troubleshoot problems in the paper path. Overview If a jam message appears on the printer control-panel display, look for jammed paper or other print media in the locations that are indicated in the following figure. Then see the tables in this section for information about clearing the jam. You might need to look for media in locations other than those specified in the jam message.
Jam recovery This printer can automatically provide jam recovery. You can use the jam-recovery to automatically reprint jammed pages. Select whether or not you want the printer to attempt to reprint jammed pages. ■ AUTO Printer will attempt to reprint jammed pages. ■ OFF Printer will not attempt to reprint jammed pages. NOTE To improve print speed and increase memory resources, you might want to disable the jam recovery.
Avoiding jams Use this table to help avoid specific types of jams. Table 7-8 Common causes of paper jams Cause Solution The print media does not meet HP recommended media storage and use specifications. Use only media that meets HP specifications. See chapter 1 in this manual or the HP print media guide (available at http://www.hp.com/support/ljpaperguide) for media recommendations. A supply item is installed incorrectly, which causes repeated jams.
Persistent jams If jams occur repeatedly, use the information in this section to diagnose the root cause of the problem. The tables in this section list possible causes and recommended solutions for jams in each area of the paper path. The information is listed in the order in which you conduct the investigation. In general, items at the beginning of the list are relatively minor repairs. Items at the end of the list are more significant repairs.
■ Try printing from all of the available input trays and to all of the available output bins to identify whether the problem is isolated to one tray. ■ Print the job in both the simplex and duplex mode to identify whether the problem occurs only in one mode or the other. ■ Try printing on paper from an unopened ream that has been stored correctly. If the jam does not occur with this media, then the customer's media might be causing the problem.
To isolate a jam, you can specify which input tray to use, which output bin to use, whether to use the duplex path, and the number of pages to print. Printing multiple pages helps to isolate intermittent jam problems. The following options are available for this test. ■ Print test page. This option uses factory default settings to run the paper path test. The page starts from tray 2, does not use the duplex path, and prints a single page. The user can specify the number of pages to be printed. ■ Source.
Jams in tray 1 Table 7-9 Causes of tray 1 jams Cause Solution The pickup roller is dirty, worn, or damaged. Clean the pickup roller. If it is dirty after cleaning, or if it is worn or damaged, replace the pickup roller. The separation pad is dirty, worn, or damaged. Clean the separation pad. If it is dirty after cleaning, or if it is worn or damaged, replace the separation pad. The drive gears are damaged. Check the drive gears in the tray 1 pickup assembly.
Jams in tray 2 Table 7-10 Causes of tray 2 jams 372 Cause Solution The feed or separation rollers are dirty, worn, or damaged. Clean the rollers. If they are dirty after cleaning, or if they are worn or damaged, replace the rollers. The pickup roller is worn or damaged. Replace the pickup roller. The tray 2 paper pickup assembly drive gears are damaged or the assembly is defective. Check the drive gears in the paper pickup drive assembly. Replace the pickup drive assembly if the gears are damaged.
Jams in tray 3 or tray 4 Table 7-11 Causes of tray 3 and or tray 4 jams Cause Solution The feed or separation rollers are dirty, worn, or damaged. Clean the rollers. If they are dirty after cleaning, or if they are worn or damaged, replace the rollers. See 500-sheet feed rollers or 1,500-sheet feeder feed rollers, or 1,500-sheet feeder separation roller. The pickup roller is worn or damaged. Replace the pickup roller. The drive transmission gear is damaged.
Jams in the paper path NOTE Avoid using odd-sized media. Odd-sized media might not travel between the transfer roller and the fuser without getting jammed. Avoid using short-grain paper. Short-grain paper might curl excessively and become jammed. This type of jam is often found between the fuser and the output destination or in the duplexer. Table 7-12 Causes of paper-path jams Cause Solution The cartridge shutter open/close mechanism is damaged.
Media transport problems If media is feeding incorrectly, use the information in this section to identify and resolve the problem. Multiple pages feed Table 7-14 Causes for multiple pages feeding Cause Solution The tray 1 separation pad is worn. Replace the separation-pad assembly. Too much media (particularly envelopes) is loaded in tray 1. Remove some of the media and resend the print job. The separation rollers in the tray are worn or damaged Replace the rollers.
Media is skewed Table 7-17 Causes for skewed media 376 Cause Solution Paper dust or dirt has accumulated on the tray feed roller or separation roller. Clean or replace the rollers. The tray feed roller and separation roller are worn irregularly. Replace the affected roller. The registration assembly is defective. Replace the registration assembly. See Registration assembly. The cassestte separation claw does not move smoothly or is deformend. Replace the side guide plate.
Image-formation troubleshooting The image-formation system is the central hub of the printer. During image formation, an image is formed with toner and then fused onto the paper.
Overhead transparency defects Overhead transparencies can show any of the image-quality problems that appear in other types of media in addition to defects that are specific to transparencies. Also, because transparencies are pliable, they can be affected by the media-handling components in the paper path. NOTE Allow transparencies to cool at least 30 seconds before handling them. ■ On the printer driver Paper tab, select Transparency as the media type.
Image defects This section helps you define print-quality problems and solutions. Often, print-quality problems can be resolved by making sure that the printer is correctly maintained, using print media that meets HP specifications, or running a cleaning page. NOTE Do not use letterhead paper that is printed with low-temperature inks, such as those that are used in some types of thermography. Do not use raised letterhead. The printer uses heat and pressure to fuse toner to the media.
Check the print cartridge Image-formation defects are often the result of problems with the print cartridge. If you suspect that the print cartridge is the source of the problem, replace the print cartridge before troubleshooting image defects. Use the following list to make sure that the print cartridge is still operable. ■ Check the print cartridge to see if it has been disassembled or refilled. ■ Inspect the cartridge for toner leaking through worn seals.
Half self-test functional check The electrophotographic process can be subdivided into the following stages: ■ Cleaning (removes excess toner from the drum surface) ■ Conditioning (places a uniform electrical charge on the drum) ■ Writing (the laser strikes the surface of the drum to create an electrostatic image) ■ Developing (forms the toner image on the drum) ■ Transferring (charges transfer the image to the print media) ■ Fusing (heat and pressure produces a permanent image) The purpose of t
Image defect tables Compare a printed sample of the image quality to these defect tables in order to determine a remedy. Table 7-19 Print-quality image defects See Table 7-20 Light print (partial page). See Table 7-21 Light print (entire page). See Table 7-22 Specks or dots. See Table 7-22 Specks or dots. See Table 7-22 Specks or dots. Aa BbCc Aa BbCc Aa BbCc Aa BbCc Aa BbCc See Table 7-23 Drop outs and character voids. See Table 7-23 Drop outs and character voids.
Table 7-19 Print-quality image defects (continued) Aa BbCc Aa BbCc Aa BbCc Aa BbCc Aa BbCc See Table 7-32 White lines. See Table 7-33 Smudged lines (either direction). See Table 7-34 White spots on black. See Table 7-35 Scattered lines. See Table 7-36 Blurred print. See Table 7-39 Dark print. See Table 7-37 Black page. See Table 7-38 Blank page. Table 7-20 Light print (partial page) Possible cause Recommended action(s) The print cartridge is not installed correctly.
Table 7-21 Light print (entire page) Possible cause Recommended action Begin by performing the half self-test functional check (see Half self-test functional check). If the image on the print drum is light, proceed with actions 1, 2, 3, 6, and 7. If the drum image is normal, proceed with actions 5, 6, and 8. The toner supply is low. Shake the print cartridge gently to redistribute the toner, or replace the cartridge. EconoMode is on. EconoMode saves toner by reducing the dot density.
Table 7-22 Specks or dots Possible cause Recommended action Specks The interior of the printer is dirty. NOTE Specks might appear onthe page after a jam has been cleared. Print two or three more pages and see if the specks diappear. 1 Print a few more pages and see if the problem corrects itself. 2 Clean the inside of the printer (see chapter 3). 3 Process a printer cleaning page. See Running the cleaning page manually. The print cartridge is damaged. Replace the print cartridge.
Table 7-23 Drop outs and character voids 386 Possible cause Recommended action(s) The user is printing on the wrong side of the paper. The label on the ream of paper indicates which side to print on. The different surface properties of some papers might cause problems if the paper is loaded incorrectly. 1 Check the arrow on the paper wrapper. From tray 1, the printer prints on the side of the paper that faces up. From the other trays, the printer prints on the side of the paper that faces down.
Table 7-23 Drop outs and character voids (continued) (Continued) Possible cause Recommended action(s) The fuser setting is incorrect for the media type. Open the configure-device menu at the control panel and change the fusermode setting or select another media type. See Configure-device menu. The transfer roller is damaged, has finger oils on its surface, or is dirty or worn. Clean the transfer roller by using a dry, lint-free cloth. Do not touch the transfer roller with your fingers.
Table 7-24 Lines (continued) Possible cause Recommended action(s) Horizontal lines (parallel to the paper-path direction) Aa BbCc Aa BbCc Aa BbCc Aa BbCc Aa BbCc If the lines are repeated at a consistent interval down the page, a repetitive defect exists. Use the repetitive defect ruler to determine the cause of this defect. See Repetitive-defects troubleshooting. Sharp, random lines indicate a problem with the laser/scanner control circuitry.
Table 7-25 Grey background (continued) Possible cause Recommended action(s) The customer is printing on the envelope seams. (Printing on an envelope seam can cause a background-scatter problem.) Move the text to an area that has no seams. The toner-density setting is wrong. Open the print-quality menu at the control panel and adjust the tonerdensity setting. See Print-quality submenu. Make sure that EconoMode is off. The high-transfer setting is turned off.
Table 7-26 Loose toner or toner smear (continued) Possible cause Recommended action(s) The fuser is defective. The print will smear if the fuser does not heat sufficiently to bond the toner to the paper. Replace the fuser. See Fuser. The dc controller PCA is defective. The dc controller PCA regulates the fuser roller temperature. Replace the dc controller PCA. See Dc controller PCA.
Table 7-28 Distorted images AaBbCc AaBbCc Possible cause Recommended action(s) The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray. Also try rotating the media 180°. 2 Check the media type and quality. Replace the media if it does not meet specifications, and advise the customer to use the HPrecommended media and to store it correctly. See Media specifications.
Table 7-29 Skew (continued) 392 Possible cause Recommended action(s) The media is not loaded correctly or the trays are not adjusted correctly. Make sure that the media is loaded correctly and that the guides fit snugly against the stack. The registration assembly is not installed correctly or is damaged. Make sure that the registration assembly is installed correctly. If necessary, replace the registration assembly. See Registration assembly.
Table 7-30 Curl or wave Possible cause Recommended action(s) The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray. Also try rotating the media 180°. 2 Check the media for type and quality. Replace the media if it does not meet specifications, and advise the customer to use the HPrecommended media and to store it correctly. See Media specifications. The operating environment does not meet specifications.
Table 7-31 Creases Possible cause Recommended action(s) The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray. Also try rotating the media 180°. 2 Check the media for type and quality. Replace the media if it does not meet specifications, and advise the customer to use the HPrecommended media and to store it correctly. See Media specifications. The operating environment does not meet specifications.
Table 7-32 White lines (continued) Possible cause Recommended action(s) The fuser roller is damaged. ■ Process a printer cleaning page. See Running the cleaning page manually. ■ If the problem persists, replace the fuser. See Fuser. 1 Check the cables between the dc controller and the laser/scanner assembly. 2 If the cables are not connected, connect the cables.
Table 7-33 Smudged lines (either direction) Aa BbCc Aa BbCc Aa BbCc Aa BbCc Aa BbCc Possible cause Recommended action(s) The paper path is contaminated or damaged. 1 Perform the half self-test functional check. See Half self-test functional check. If the drum is damaged, replace the print cartridge. 2 Process a printer cleaning page. See Running the cleaning page manually. If the problem persists, replace the fuser. See Fuser. 3 Check the tray 1 feed roller and the rollers in the other trays.
Table 7-35 Scattered lines Possible cause Recommended action(s) The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray. Also try rotating the media 180°. 2 Check the media for type and quality. Replace the media if it does not meet specifications, and advise the customer to use the HPrecommended media and to store it correctly. See Media specifications. The operating environment does not meet specifications.
Table 7-36 Blurred print (continued) Possible cause Recommended action(s) The high-transfer setting is turned off. Open the print-quality menu at the control panel (see Print-quality submenu). Select OPTIMIZE and set HIGH TRANSFER=ON. The line-detail setting is turned off. Open the print-quality menu at the control panel (see Print-quality submenu). Select OPTIMIZE and set LINE DETAIL=ON. Possible cause Recommended action(s) The print cartridge is defective. Replace the print cartridge.
Table 7-38 Blank page Possible cause Recommended action(s) The software configuration is incorrect (intermittent problem). Make sure that the software program is not sending incorrect page-length requests or extra page-eject commands. The network configuration is incorrect. Some sharing devices on networks might generate a blank page as a printjob separator. Check with the network administrator. Multiple feeds are occurring.
Table 7-39 Dark print Possible cause Recommended action(s) The toner-density setting is incorrect. Open the print-quality menu at the control panel and adjust the tonerdensity setting. See Print-quality submenu. The print cartridge drum is close to the end of its expected life. Replace the print cartridge. The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray. Also try rotating the media 180°. 2 Check the media for type and quality.
Table 7-40 Repetitive defects (continued) Roller Distance between defects Replacement part Photosensitive drum 94.2 mm (3.75 inches) Print cartridge *The developer-roller circumference is 62.8 mm (2.5 inches). A defect that is related to the developing roller will most likely repeat at intervals of 54.0 mm (2.125 inches) because of the way the roller is geared. NOTE Defects on the tray pickup rollers or the tray 1 pickup roller do not cause a repetitive defect.
Troubleshooting the stacker and the stapler/stacker When troubleshooting problems are related to the stacker or stapler/stacker, you might find that it is difficult to distinguish whether the malfunction relates to the stacker, the stapler/stacker, or the printer. The troubleshooting procedures in this section assume that the stacker or stapler/stacker is installed on a printer that is working normally. Always correct any printer errors before attempting to troubleshoot the stacker or stapler/stacker.
Jam errors The following sections describe stacker and stapler/stacker jam errors.
Stacker paper-path test Use the following procedure to perform a stacker paper-path test. 1 Press 2 Use (UP ARROW button) or 3 Use or 4 Use or press . 5 Use or to scroll to COPIES then press and then press . 6 Use or to scroll to PRINT TEST PAGE, and then press number of pages and send them to the stacker. (SELECT button) or the MENU button to open the menus.
Table 7-41 Printer-connection-area jam troubleshooting (continued) Possible cause Recommended action(s) The inlet-sensor (PS1101) arm cannot move freely or is damaged. Inspect the inlet sensor (PS1101). See Stacker and stapler/ stacker switches and sensors. Verify that the sensor arm can move freely. If necessary, replace the stacker or stapler/ stacker. The inlet-sensor (PS1101) spring is defective or damaged. Reseat the inlet-sensor (PS1101) spring.
Paper-transport errors Table 7-43 Paper-transport-error troubleshooting Possible cause Recommended action(s) The rollers are worn, dirty, or defective. Inspect all of the stacker or stapler/stacker rollers. Clean any dirty rollers. If necessary, replace the stacker or stapler/ stacker. The feed guide is damaged, causing the leading edge of the media to bend Inspect the feed guide. If, necessary, replace the stacker or stapler/stacker. An obstruction in the paper path causes skewed print.
Component errors NOTE When component errors occur, a control-panel message appears on the controlpanel display. For more information about these messages, see Alphabetical printer messages and Numerical printer messages. Table 7-45 Component-error troubleshooting Possible cause Recommended action(s) The jogger mechanism or motor (M1102) is defective (stapler/stacker only). Inspect the jogger mechanism. See Stacker and stapler/ stacker motors and solenoids. If necessary, replace the stapler/stacker.
Table 7-45 Component-error troubleshooting (continued) Possible cause Recommended action(s) The OUTPUT PAPER PATH OPEN message appears on the control-panel display, but the jam access and stapler unit doors are closed. ■ The door-open switch (SW1101) is damaged or defective. See Stacker and stapler/stacker switches and sensors. Replace the stacker or stapler/stacker. ■ The stapler/stacker PCA is defective. Replace the stacker or stapler/stacker.
Printer-component locations The following sections describe the printer-component locations.
2 3 4 1 Figure 7-11 Location of the main printer parts (2 of 4) 410 1 Registration assembly 2 Delivery assembly 3 Fuser assembly 4 Tray 1 pickup assembly 7 Troubleshooting
2 1 3 Figure 7-12 Location of the main printer parts (3 of 4) 1 Transfer roller 2 Tray 1 pickup roller 3 Separation pad Printer-component locations 411
1 2 3 Figure 7-13 Location of the main printer parts (4 of 4) 412 1 Pickup roller 2 Feed roller 3 Separation roller (in the tray) 7 Troubleshooting
Printer switches and sensors PS104 SW102 SW101 TH2 PS108 PS106 PS109 PS103 PS102 PS101 PS107 PS105 Figure 7-14 Location of the printer switches and sensors SW101 Top-cover-open switch SW102 Paper-size switch PS101 Tray 2 paper sensor PS102 Pre-feed sensor PS103 Top-of-page sensor PS104 Output-bin-full sensor PS105 Tray 1 paper sensor (on the tray 1 pickup assembly) PS106 Paper-width sensor #1 PS107 Paper-stack-position sensor PS108 Fuser-assembly-delivery sensor PS109 Paper-wid
Printer motors and fans 2 3 4 1 5 Figure 7-15 Location of the printer motors and fans 414 1 Main cooling fan 2 Main drive motor 3 Right-side cooling fan (HP LaserJet 4250/4300/4350 only) 4 Print-cartridge motor (HP LaserJet 4250/4300/4350 only) 5 Lifter-drive motor 7 Troubleshooting
Printer PCAs 2 1 Figure 7-16 Location of the printer PCAs 1 Power-supply assembly (high-voltage and low-voltage circuits) 2 Dc controller PCA Printer-component locations 415
Accessory component locations The following sections describe the component locations within the printer accessories.
500-sheet feeder switches, sensors, solenoids, and PCAs 2 1 3 4 5 Figure 7-18 Location of the 500-sheet paper feeder switches, sensors, solenoids, and PCAs 1 500-sheet feeder paper-size switch (SW801) 2 500-sheet feeder control PCA 3 500-sheet feeder paper-stack-position sensor (PS802) 4 500-sheet feeder paper-pickup solenoid (SL801) 5 500-sheet feeder paper sensor (PS801) Accessory component locations 417
1,500-sheet feeder main parts 1 2 Figure 7-19 Location of the 1,500-sheet paper feeder main parts (1 of 2) 418 1 1,500-sheet feeder lifter-drive assembly 2 1,500-sheet feeder pickup-gear assembly 7 Troubleshooting
1 2 3 Figure 7-20 Location of the 1,500-sheet paper feeder main parts (2 of 2) 1 1,500-sheet feeder feed roller 2 1,500-sheet feeder pickup roller 3 1,500-sheet feeder separation roller (in the door) Accessory component locations 419
1,500-sheet feeder switches, sensors, solenoids, and PCAs 3 2 4 5 1 6 Figure 7-21 Location of the 1,500-sheet switches, sensors, solenoids, and PCAs 420 1 1,500-sheet feeder paper-stack-position sensor (SR2) 2 1,500-sheet feeder paper-size sensor (SW1) 3 1,500-sheet feeder control PCA 4 1,500-sheet feeder paper sensor (SR3) 5 1,500-sheet feeder paper-pickup solenoid (SL1) 6 1,500-sheet feeder door sensor (SR1) 7 Troubleshooting
Stapler/stacker stapler assembly 1 Figure 7-22 Location of the stapler/stacker stapler unit 1 Stapler unit (stapler/stacker accessory only) Accessory component locations 421
Stacker and stapler/stacker switches and sensors 4 5 3 6 2 1 7 Figure 7-23 Location of the stacker and stapler/stacker switches and sensors 422 1 Delivery-roller disengaging sensor (stapler/stacker only; PS1104) 2 Paddle home-position sensor (stapler/stacker only; PS1103) 3 Paper-delivery sensor (PS1102) 4 Paper-full sensor (PS1106) 5 Jogger home-position sensor (stapler/stacker only; PS1105) 6 Door-open switch (SW1101) 7 Paper-inlet sensor (PS1101) 7 Troubleshooting
Stacker and stapler/stacker motors and solenoids 3 4 2 1 5 Figure 7-24 Location of the stacker and stapler/stacker motors and solenoids 1 Deflector solenoid (SL1101) 2 Paddle mechanism and motor (stapler/stacker only; M1101) 3 Jogger mechanism and motor (stapler/stacker only; M1102) 4 Clamp solenoid (stapler/stacker only; SL1102) 5 Feed mechanism and motor (M1103) Accessory component locations 423
Stacker and stapler/stacker PCAs 2 1 Figure 7-25 Location of the stacker and stapler/stacker PCAs 424 1 Stacker or stapler/stacker driver PCA 2 Stacker or stapler/stacker LED PCA 7 Troubleshooting
Printer and accessory wiring diagrams The following sections contain wiring diagrams for the printer and its accessories.
HP LaserJet 4200 wiring diagram Figure 7-26 HP LaserJet 4200 wiring diagram 426 7 Troubleshooting
Printer and accessory wiring diagrams 427 Figure 7-27 HP LaserJet 4250 wiring diagram SW102 Paper size switches J90 J120 6 5 4 3 2 1 4 3 2 1 1 2 3 4 1 24R 2 /SEL2 3 GND 4 OPSOUT 5 OPSIN 6 OPSCLK M103 M 12 J71 9 8 7 6 5 4 3 2 1 J1001(1500F) J105LA J105DA B6 A6 Paper feeder or Paper deck J105LB J105D J105L J91 J80 B6 A6 6 5 4 3 2 1 1 2 3 1 2 3 4 5 6 1 2 3 1 2 1 2 M102 Drum motor M J121 J128DDW J128LDW 2 J136M 1 J134M TB28 HEATER1 1 FUSERBIAS2 J50 H2 1 H1 1 2 1 J136F
HP LaserJet 4300 wiring diagram Figure 7-28 HP LaserJet 4300 wiring diagram 428 7 Troubleshooting
Printer and accessory wiring diagrams 429 Figure 7-29 HP LaserJet 4350 wiring diagram SW102 Paper size switches J90 J120 6 5 4 3 2 1 4 3 2 1 1 2 3 4 1 24R 2 /SEL2 3 GND 4 OPSOUT 5 OPSIN 6 OPSCLK M103 M 12 J71 9 8 7 6 5 4 3 2 1 J1001(1500F) J105LA J105DA B6 A6 Paper feeder or Paper deck J105LB J105D J105L J91 J80 B6 A6 6 5 4 3 2 1 1 2 3 1 2 3 4 5 6 1 2 3 1 2 1 2 M102 Drum motor M J121 J128DDW J128LDW 2 J136M 1 J134M TB28 HEATER1 1 FUSERBIAS2 J50 H2 1 H1 1 2 1 J136F
500-sheet feeder wiring diagram Figure 7-30 500-sheet feeder wiring diagram 430 7 Troubleshooting
1,500-sheet feeder wiring diagram Figure 7-31 1,500-sheet feeder wiring diagram Printer and accessory wiring diagrams 431
Duplex accessory wiring diagram Figure 7-32 Duplex-accessory wiring diagram 432 7 Troubleshooting
Envelope-feeder-accessory wiring diagram Figure 7-33 Envelope-feeder-accessory wiring diagram Printer and accessory wiring diagrams 433
Stacker-accessory wiring diagram Figure 7-34 Stacker-accessory wiring diagram 434 7 Troubleshooting
Stapler/stacker-accessory wiring diagram Figure 7-35 Stapler/stacker-accessory wiring diagram Printer and accessory wiring diagrams 435
Dc controller connectors diagram Figure 7-36 Dc controller connectors diagram 436 7 Troubleshooting
General timing diagrams The following sections contain timing diagrams for the printer.
HP LaserJet 4200 general timing diagram 438 7 Figure 7-37 HP LaserJet 4200 general timing diagram Troubleshooting
General timing diagrams Video (VDO1, /VDO1,VDO2, /VDO2) Main motor (M101) Drum motor (M102) Scanner motor Laser Cooling fan #1 (FN101) Cooling fan #2 (FN103) 3 4 5 6 7 8 9 25 fuser heater (H1, H2) 24 Pressure roller bias 23 fuser film bias 22 Transfer charging bias 21 Developing bias (DC) 20 Developing bias (AC) 19 Primary charging bias (DC) 18 Primary charging bias (AC) 17 Face-down tray paper full sensor (PS104) 16 fuser unit delivery paper sensor (PS108) 15 Paper width sensor (PS
HP LaserJet 4300 general timing diagram 440 7 Figure 7-39 HP LaserJet 4300 general timing diagram Troubleshooting
General timing diagrams Video (VDO1, /VDO1,VDO2, /VDO2) Main motor (M101) Drum motor (M102) Scanner motor Laser Cooling fan #1 (FN101) Cooling fan #2 (FN103) 3 4 5 6 7 8 9 25 fuser heater (H1, H2) 24 Pressure roller bias 23 fuser film bias 22 Transfer charging bias 21 Developing bias (DC) 20 Developing bias (AC) 19 Primary charging bias (DC) 18 Primary charging bias (AC) 17 Face-down tray paper full sensor (PS104) 16 fuser unit delivery paper sensor (PS108) 15 Paper width sensor (PS
Stapler/stacker timing diagram Figure 7-41 Stapler/stacker timing diagram 442 7 Troubleshooting
8 Parts and diagrams Chapter contents ● Ordering parts and supplies ● Consumables and accessories ● Covers ● Internal components ● Accessories ● Alphabetical parts list ● Numerical parts list Chapter contents 443
Ordering parts and supplies This section contains information about how to order parts and supplies for this device. Parts This chapter contains field replaceable unit (FRU) and accessory part numbers. Replacement parts can be ordered from the HP Services. Go to http://www.hp.com/go/parts/ for information about ordering service parts in your area. Go to http://www.hp.com/go/partsinfo/ for the online HP service parts identification tool (HP PartSurfer).
HP provides free telephone support during the product warranty period. When you call, you will be connected to a responsive team waiting to help you. For the number you should call in your country/ region, see the support sheet that came in the box with your printer.
Supplies See Ordering parts and supplies. Consumables are available directly from HP at the following numbers: ■ US: 1-800-HPINVENT ■ Canada: 1-800-474-6836 ■ United Kingdom: 0734-441212 ■ Germany: 0130-3322 Contact your local HP Parts Coordinator for other local phone numbers.
Consumables and accessories Consumables 3 Figure 8-1 Consumables Table 8-2 Consumables Ref Item Product number Service/exchange number 1 10,000-page print cartridge, LJ 4250/4350 printers Q5942A Q5942-67901 1 12,000-page print cartridge, LJ 4200/4200L printers Q1338A Q1338-67901 1 18,000-page print cartridge, LJ 4300 printers Q1339A Q1339-67901 1 20,000-page cartridge, LJ 4250/4350 printers Q5942X Q5492-67902 2 Preventive maintenance kit, LJ 4200/4200L printers, 110-127 V Q2429A Q242
Accessories Figure 8-2 Accessories 448 8 Parts and diagrams
Table 8-3 Accessories Ref Accessory Product number Service/exchange number 1 500-sheet tray and feeder Q2240B Q2440-67903 2 1,500-sheet tray and feeder Q2444B Q2444-67902 3 Duplexer Q2439B Q2439-67902 4 75-sheet envelope feeder Q2438B Q2438-67902 5 500-sheet stapler/stacker Q2443B Q2443-67908 6 500-sheet stacker Q2442B Q2442-67902 7 Printer stand Q2445B Q2445-60102 Consumables and accessories 449
Memory, fonts, and mass storage Figure 8-3 Memory, fonts, and mass storage Table 8-4 Memory, fonts, and mass storage Ref Item Product number Service/exchange number 1 Firmware DIMM (LJ 4200, base model) Q2453-67925 1 Firmware DIMM (LJ 4200, all models except for base model) Q2453-67906 1 Firmware DIMM (LJ 4200L) Q2453-67932 1 Firmware DIMM (LJ 4300) Q2453-67915 1 SDRAM DIMM, 8 MB (LJ 4200/4300) C7842-67901 1 SDRAM DIMM, 16 MB (LJ 4200/4300) C7843-67901 1 SDRAM DIMM, 32 MB (LJ 4200/43
Table 8-4 Memory, fonts, and mass storage (continued) Ref Item Product number 3 Flash DIMM, 8 MB (LJ 4200/4300) C8530A 3 Flash DIMM, 12 MB (LJ 4200/4300) C7867A Consumables and accessories Service/exchange number 451
Cables and connectivity Figure 8-4 Cables and connectivity Table 8-5 Cables and connectivity 452 Ref Item Product number Service/exchange number 1 HP Jetdirect 615n Fast Ethernet internal print server (for HP LaserJet 4200/4300 printers only) J6057A J6057-69001 1 HP Jetdirect 620n Fast Ethernet internal print server for HP LaserJet 4250/4350 printers J7934A J7934-61001/J7934-69001 1 HP Jetdirect 625n Gigabit internal print server for HP LaserJet 4250/4350 printers J7960A J7960-61001 1 HP
Formatters, laser/scanners, power supplies, and fusers Table 8-6 Formatters, laser/scanners, power supplies, and fusers Item Product number Service/exchange number Q9652A C9652-67902/C9652-69001 Formatters Formatter, LJ 4200 Formatter, LJ 4200L C9652-67903/C9652-69003 Formatter, LJ 4300 Q9651A C9651-67901/C9651-69001 Formatter, LJ 4250/4350 (base models) Q3653A Q3653-67901/Q3653-69001 Formatter, LJ 4250/4350 (network models) Q3652A Q3652-67901/Q3652-69001 Laser/scanners Laser/scanner, LJ 420
Assembly locations (1 of 3) 454 Ref. Description Details 1 500-sheet universal replacement tray See Figure 8-14 500-sheet feeder (1 of 2). 2 Feed roller assembly See Figure 8-11 Feed roller assembly. 3 Registration assembly See Figure 8-6 Internal components (1 of 3).
Assembly locations (2 of 3) Ref. Description Details 4 Power-supply assembly See Figure 8-9 Electrical components. 5 Delivery assembly See Figure 8-8 Internal components (3 of 3). 6 Fuser assembly See Figure 8-8 Internal components (3 of 3). 7 Tray 1 pickup assembly See Figure 8-12 Tray 1 pickup assembly.
Assembly locations (3 of 3) 456 Ref. Description Details 8 Duplexing-pendulum assembly See Figure 8-8 Internal components (3 of 3). 9 Main-drive assembly See Figure 8-10 Main drive assembly 10 Paper-pickup-drive assembly See Figure 8-7 Internal components (2 of 3). 11 Lifter-drive assembly See Figure 8-8 Internal components (3 of 3).
Consumables and accessories 457
Covers Figure 8-5 Covers 458 8 Parts and diagrams
Table 8-7 Covers Covers Ref Description Part number Qty 1 Cover, left (LJ 4200/4300) RC1-0287-020CN 1 1 Cover, left (LJ 4250/4350) RM1-1077-000CN 1 2 Cover, formatter RC1-0288-000CN 1 3 Cover, paper-handling RC1-0289-000CN 1 4 Cover, legal (LJ 4200/4300) RC1-0290-000CN 1 4 Cover, legal (LJ 4250/4350) RC1-3282-000CN 1 5 Cover, duplexing (LJ 4200/4300) RC1-0291-000CN 1 5 Cover, duplexing (LJ 4250/4350) RC1-3280-000CN 1 6 Cover assembly, right (LJ 4200/4300) RM1-0046-000
460 Ref Description Part number Qty 13 Overlay, control panel, CS/HU/PL/EL (LJ 4250/4350) Q5400-60103 1 13 Overlay, control panel, NO/SV/FI (LJ 4250/4350) Q5400-60104 1 13 Overlay, control panel, ES/PT/IT (LJ 4250/4350) Q5400-60105 1 13 Overlay, control panel, EN/RU/TR (LJ 4250/4350) Q5400-60106 1 13 Overlay, control panel, EN/AR (LJ 4250/4350) Q5400-60107 1 13 Overlay, control panel, EN/DE/FR/NL (LJ 4250/4350) Q5400-60108 1 13 Overlay, control panel, FR (LJ 4250/4350) Q5400-6
Covers 461
Internal components Figure 8-6 Internal components (1 of 3) 462 8 Parts and diagrams
Table 8-8 Internal components (1 of 3) Ref Description Part number Qty 2 Spring, torsion RC1-0061-000CN 1 3 Transfer roller, LJ 4200/4300 RM1-0699-020CN 1 3 Transfer roller, LJ 4250/4350 RM1-1110-000CN 1 4 Guide, flat cable RC1-0269-020CN 1 5 Guide, flat cable RC1-0270-020CN 1 6 Motor, print cartridge (M102), 8–pin (LJ 4250/4350) RK2-0274-000CN 1 6 Motor, print cartridge (M102), 8–pin (LJ 4300) RH7-1576-020CN 1 7 Motor, main (M101), 10–pin (LJ4200/4300) RH7-1570-000CN 1 7
464 Ref Description Part number Qty 501 Screw, tapping, pan head, m4x10 XB4-7401-007CN 14 502 Screw, w/washer, m3x6 XB2-7300-607CN 2 8 Parts and diagrams
Internal components 465
Figure 8-7 Internal components (2 of 3) 466 8 Parts and diagrams
Table 8-9 Internal components (2 of 3) Ref Description Part number Qty 1 Rod, switch RC1-0268-000CN 1 2 Guide, scanner cable RC1-0340-020CN 1 3 Guide, scanner cable RC1-0385-000CN 1 4 Gear, 18t RU5-0045-020CN 1 5 Shaft, retard drive RL1-0264-000CN 1 6 Sensor, top-bin-full/stack (PS 104/PS 107), LJ 4200/4300 WG8-5362-000CN 1 6 Sensor, stack (PS 107), LJ 4250/4350 WG8-5624-000CN 1 7 Gear, 23t RU5-0040-000CN 1 8 Bushing RC1-0206-000CN 1 9 Laser/scanner assembly (LJ 4200
468 Ref Description Part number Qty 31 Sheet, solenoid damper RC1-0330-020CN 1 32A Cable, feeder connector (LJ 4200/4300) RG1-4223-000CN 1 32A Cable, feeder connector (LJ 4250/4350) RM1-1192-000CN 1 33 Kicker assembly RL1-0015-000CN 1 35 Size-sensing assembly, tray 2 RM1-0041-020CN 1 36 Foot RB1-8107-000CN 2 37 Guard, right-edge RC1-0242-000CN 1 38 Guide, ECU, rear RC1-0244-000CN 1 39 Guard, left-edge RC1-0247-000CN 1 41 Screw, tapping, m3x6 XA9-1503-000CN 3 42
Internal components 469
Figure 8-8 Internal components (3 of 3) 470 8 Parts and diagrams
Table 8-10 Internal components (3 of 3) Ref Description Part number Qty 1 Support, lifter-drive assembly RC1-0200-020CN 1 2 Duct, fan 2 (right side) (LJ 4300) RC1-0272-000CN 1 2 Duct, fan 2 (right side) (LJ 4250/4350) RC1-3338-000CN 1 3 Guide, left RC1-0273-000CN 1 4 Guide, right RC1-0274-020CN 1 5 Holder, thermistor (plastic) RC1-0342-020CN 1 6 Holder, thermistor (metal) RC1-0343-020CN 1 7 Cover, fan connector RC1-0344-020CN 1 8 Guide, connecting cable RC1-0386-000CN
472 Ref Description Part number Qty 26 Cable, fuser (LJ 4300) RG1-4231-000CN 1 27 Paper-delivery assembly RM1-0026-040CN 1 28 Duplexing-pendulum assembly RM1-0002-020CN 1 29 Lifter-drive assembly (LJ 4200/4300) RM1-0033-020CN 1 29 Lifter-drive assembly (LJ 4250/4350) RM1-1074-000CN 1 30 Tray 1 pickup assembly (LJ 4200/4300) (also see Figure 8-12 Tray 1 pickup assembly) RM1-0004-060CN 1 30 Tray 1 pickup assembly (LJ 4250/4350) (also see Figure 8-12 Tray 1 pickup assembly) RM1-1
Internal components 473
Figure 8-9 Electrical components 474 8 Parts and diagrams
Table 8-11 Electrical components Ref Description Part number Qty 1 Power-supply assembly, 110-127 V (LJ 4200) RM1-0019-050CN 1 1 Power-supply assembly, 220-240 V (LJ 4200) RM1-0020-000CN 1 1 Power-supply assembly, 110-127 V (LJ 4250/4350) RM1-1070-000CN 1 1 Power-supply assembly, 220-240 V (LJ 4250/4350) RM1-1071-000CN 1 1 Power-supply assembly, 110-127 V (LJ 4300) RM1-0107-000CN 1 1 Power-supply assembly, 220-240 V (LJ 4300) RM1-0108-000CN 1 2 Feed assembly RM1-0025-040CN 1
1 Figure 8-10 Main drive assembly 476 8 Parts and diagrams
Table 8-12 Main drive assembly Ref 1 Internal components Description Part number Qty Main drive assembly (LJ 4200/4300) RM1-0001-030CN 1 Main drive assembly (LJ 4250/4350) RM1-1066-000CN 1 Arm, cartridge-release RC1-0003-000CN 1 477
Figure 8-11 Feed roller assembly 478 8 Parts and diagrams
Table 8-13 Feed roller assembly Ref Description Part number Qty Feed-roller assembly RM1-0012-020CN 1 1 Clutch (CL101) (LJ 4200/4300) RH7-5358-000CN 1 1 Clutch (CL101) (LJ 4250/4350) RK2-0349-000CN 1 2 Gear, 30t RU5-0050-000CN 1 3 E-ring (LJ4200/4300) XD9-0137-000CN 1 3 E-ring (LJ4250/4350) XD9-0234-010CN 1 Internal components 479
1 3 2 4 Figure 8-12 Tray 1 pickup assembly 480 8 Parts and diagrams
Table 8-14 Tray 1 pickup assembly Ref Description Part number Qty Tray 1 pickup assembly (LJ 4200/4300) RM1-0004-060CN 1 Tray 1 pickup assembly (LJ 4250/4350) RM1-1097-000CN 1 1 Tray 1 RM1-0005-020CN 1 2 Separation pad RL1-0007-000CN 1 3 Solenoid, tray 1 pickup (LJ 4200/4300) RH7-5357-000CN 1 3 Solenoid, tray 1 pickup (LJ 4250/4350) RK2-0276-000CN 1 4 Roller, pickup RL1-0019-000CN 1 Internal components 481
Figure 8-13 PCAs 482 8 Parts and diagrams
Table 8-15 PCAs Ref Description Part number Qty 1 Dc controller (LJ 4200) RG1-4236-040CN 1 1 Dc controller (LJ 4250/4350) RM1-1108-000CN 1 1 Dc controller (LJ 4300) RG1-4237-040CN 1 (not shown) Formatter assembly (LJ 4200 printer) C9652-67902 1 (not shown) Formatter assembly (LJ 4200L printer) C9652-67903 1 (not shown) Formatter assembly (LJ 4250/4350 printer, base model) Q3653-67901 1 (not shown) Formatter assembly (LJ 4250/4350 printer, network models) Q3652-67901 1 (not sh
Accessories Figure 8-14 500-sheet feeder (1 of 2) 484 8 Parts and diagrams
Table 8-16 500-sheet feeder (1 of 2) Ref Accessories Description Part number Qty 500-sheet feeder and tray Q2440-67903 1 1 Lifter-drive assembly, 500-sheet feeder RM1-1094-000CN 1 2 Paper-pickup-drive assembly, 500-sheet feeder RM1-0056-000CN 1 3 500-sheet universal replacement tray (LJ 4200/4300) RM1-0028-060CN 1 3 500-sheet universal replacement tray (LJ 4250/4350) RM1-1088-000CN 1 (not shown) Stop, detent RC1-3303-000CN 1 (not shown) Limiter, torque RC1-3335-000CN 1 485
Figure 8-15 500-sheet feeder (2 of 2) 486 8 Parts and diagrams
Table 8-17 500-sheet feeder (2 of 2) Accessories Ref Description Part number Qty 1 Cover, front upper, 500-sheet feeder RC1-0486-020CN 1 2 Cover, left, 500-sheet tray RC1-0487-020CN 1 3 Cover, right, 500-sheet tray RC1-0488-020CN 1 4 Cover, number-display plate, 500-sheet tray RC1-0500-000CN 1 7 Cover, legal RC1-0509-000CN 1 11 Number, display, optional feeder (LJ 4250/4350) RC1-3304-000CN 1 (not shown) PCA, 500-sheet feeder RM1-1122-000CN 1 (not shown) Cable, interface, u
Figure 8-16 1,500-sheet feeder (1 of 2) 488 8 Parts and diagrams
Table 8-18 1,500-sheet feeder (1 of 2) Ref Accessories Description Part number Qty 1,500-sheet feeder Q2444–67902 1 1 Paper-pickup assembly, 1,500-sheet feeder RM1-1134-000CN 1 2 Cover assembly, front, 1,500-sheet feeder RM1-0273-070CN 1 3 Pickup drive assembly, 1,500-sheet feeder RM1-1133-000CN 1 4 Lifter-drive assembly, 1,500-sheet feeder RM1-1136-000CN 1 489
Figure 8-17 1,500-sheet feeder (2 of 2) 490 8 Parts and diagrams
Table 8-19 1,500-sheet feeder (2 of 2) Accessories Ref Description Part number Qty 1 Cover, right, 1,500-sheet feeder RC1-0661-000CN 1 2 Cover, left, 1,500-sheet feeder RC1-0662-000CN 1 3 Cover, rear, 1,500-sheet feeder RC1-0663-000CN 1 8 Screw, B, M4X8 XA9-1523-010CN 1 9 Screw, w/washer, M3X8 XA9-1420-010CN 4 11 Cover assembly, front, 1,500-sheet feeder RM1-0273-070CN 1 (not shown) PCA, 1,500-sheet feeder RG1-4374-000CN 1 (not shown) Cable, interface, 1,500-sheet feeder
1 2 3 5 4 5 Figure 8-18 Stapler/stacker, stacker, and stapler 492 8 Parts and diagrams
Table 8-20 Stapler/stacker, stacker, and stapler Accessories Ref Description Part number Qty 1 Stapler unit only RM1-1164-000CN 1 2 1,000-staple cartridge (3-pack) Q3216-60500 1 3 Stacker Q2442-67902 1 4 Stapler/stacker Q2443-67908 1 5 Output bin (fits stapler, stapler/stacker, or stacker) RM1-0248-000CN 1 (not shown) Cover, rear assembly, stacker RM1-0237-000CN 1 493
Alphabetical parts list Table 8-21 Alphabetical parts list 494 Description Part number Table and page 1,000-staple cartridge (3-pack) Q3216-60500 Stapler/stacker, stacker, and stapler 1,500-sheet feeder Q2444–67902 1,500-sheet feeder (1 of 2) 500-sheet feeder and tray Q2440-67903 500-sheet feeder (1 of 2) 500-sheet universal replacement tray (LJ 4200/4300) RM1-0028-060CN 500-sheet feeder (1 of 2) 500-sheet universal replacement tray (LJ 4250/4350) RM1-1088-000CN 500-sheet feeder (1 of 2)
Table 8-21 Alphabetical parts list (continued) Description Part number Table and page Cable, laser (LJ 4250/4350) RM1-1198-000CN Internal components (2 of 3) Cable, media-size sensor, 1,500-sheet feeder RG1-4240-000CN 1,500-sheet feeder (2 of 2) Cable, power-supply inlet, 110-127 V (LJ 4200/4300) RG1-4209-000CN Electrical components Cable, power-supply inlet, 110-127 V (LJ 4250/4350) RM1-1218-000CN Electrical components Cable, power-supply inlet, 220-240 V (LJ 4200/4300) RG1-4230-000CN Elec
Table 8-21 Alphabetical parts list (continued) Description Part number Table and page Cover, left (LJ 4200/4300) RC1-0287-020CN Covers Cover, left (LJ 4250/4350) RM1-1077-000CN Covers Cover, left, 1,500-sheet feeder RC1-0662-000CN 1,500-sheet feeder (2 of 2) Cover, left, 500-sheet tray RC1-0487-020CN 500-sheet feeder (2 of 2) Cover, legal RC1-0509-000CN 500-sheet feeder (2 of 2) Cover, legal (LJ 4200/4300) RC1-0290-000CN Covers Cover, legal (LJ 4250/4350) RC1-3282-000CN Covers Cover,
Table 8-21 Alphabetical parts list (continued) Description Part number Table and page Feed-roller assembly RM1-0012-020CN Feed roller assembly Flag, paper feed sensor RC1-0060-000CN Internal components (1 of 3) Flag, paper sensing RC1-0209-000CN Internal components (2 of 3) Foot RB1-8107-000CN Internal components (2 of 3) Formatter assembly (LJ 4200 printer) C9652-67902 PCAs Formatter assembly (LJ 4200L printer) C9652-67903 PCAs Formatter assembly (LJ 4250/4350 printer, base model) Q36
Table 8-21 Alphabetical parts list (continued) 498 Description Part number Table and page Guide, tray 2 RC1-0153-030CN Internal components (2 of 3) Holder, paper pickup arm RC1-0212-000CN Internal components (2 of 3) Holder, paper sensing RC1-0208-030CN Internal components (2 of 3) Holder, thermistor (metal) RC1-0343-020CN Internal components (3 of 3) Holder, thermistor (plastic) RC1-0342-020CN Internal components (3 of 3) Kicker assembly RL1-0015-000CN Internal components (2 of 3) La
Table 8-21 Alphabetical parts list (continued) Description Part number Table and page Output bin (fits stapler, stapler/stacker, or stacker) RM1-0248-000CN Stapler/stacker, stacker, and stapler Overlay, control panel, AR (LJ 4250/4350) Q5400-60111 Covers Overlay, control panel, CS/HU/PL/EL (LJ 4250/4350) Q5400-60103 Covers Overlay, control panel, EN (LJ 4250/4350) RC1-3356-000CN Covers Overlay, control panel, EN/AR (LJ 4200/4300) Q2431-60112 Covers Overlay, control panel, EN/AR (LJ 4250/43
Table 8-21 Alphabetical parts list (continued) 500 Description Part number Table and page Power-supply assembly, 110-127 V (LJ 4250/4350) RM1-1070-000CN Electrical components Power-supply assembly, 110-127 V (LJ 4250/4350) (also see Figure 8-9 Electrical components) RM1-1070-000CN Internal components (1 of 3) Power-supply assembly, 110-127 V (LJ 4300) RM1-0107-000CN Electrical components Power-supply assembly, 110-127 V (LJ 4300) (also see Figure 8-9 Electrical components) RM1-0107-000CN Int
Table 8-21 Alphabetical parts list (continued) Description Part number Table and page Screw, tapping, truss head, m4x16 XB4-7401-605CN Internal components (3 of 3) Screw, tapping, truss head, m4x8 XB4-7400-809CN Internal components (2 of 3) Screw, w/washer, m3x6 XB2-7300-607CN Internal components (1 of 3) Screw, w/washer, M3X8 XA9-1420-010CN 1,500-sheet feeder (2 of 2) Screw, w/washer, m3x8 XA9-1420-000CN Electrical components Screw, w/washer, m4x6 XB2-7400-606CN Electrical components S
Table 8-21 Alphabetical parts list (continued) 502 Description Part number Table and page Support, lifter-drive assembly RC1-0200-020CN Internal components (3 of 3) Swing plate assembly RM1-0043-020CN Internal components (2 of 3) Thermistor (LJ 4200/4300) RH7-7116-000CN Internal components (3 of 3) Thermistor (LJ 4250/4350) RK2-0359-000CN Internal components (3 of 3) Transfer roller, LJ 4200/4300 RM1-0699-020CN Internal components (1 of 3) Transfer roller, LJ 4250/4350 RM1-1110-000CN I
Numerical parts list Table 8-22 Numerical parts list Part number Description Table and page C9651-67901 Formatter assembly (LJ 4300 printer) PCAs C9652-67902 Formatter assembly (LJ 4200 printer) PCAs C9652-67903 Formatter assembly (LJ 4200L printer) PCAs Q2425-67901 Name plate kit, LJ 4200 Covers Q2431-40021 Overlay, control panel, Turkish (LJ 4200/4300) Covers Q2431-40022 Overlay, control panel, Hebrew (LJ 4200/4300) Covers Q2431-40023 Overlay, control panel, Greek (LJ 4200/4300) Cov
Table 8-22 Numerical parts list (continued) 504 Part number Description Table and page Q5400-60108 Overlay, control panel, EN/DE/FR/NL (LJ 4250/4350) Covers Q5400-60109 Overlay, control panel, FR (LJ 4250/4350) Covers Q5400-60111 Overlay, control panel, AR (LJ 4250/4350) Covers Q5400-67911 Name plate kit, LJ 4250 Covers Q5406-67912 Name plate kit, LJ 4350 Covers RB1-8107-000CN Foot Internal components (2 of 3) RC1-0003-000CN Arm, cartridge-release Main drive assembly RC1-0019-000CN
Table 8-22 Numerical parts list (continued) Part number Description Table and page RC1-0288-000CN Cover, formatter Covers RC1-0289-000CN Cover, paper-handling Covers RC1-0290-000CN Cover, legal (LJ 4200/4300) Covers RC1-0291-000CN Cover, duplexing (LJ 4200/4300) Covers RC1-0307-000CN Spring, leaf grounding, top Cover (LJ 4250/4350 only) Covers RC1-0320-000CN Cover, envelope Internal components (3 of 3) RC1-0330-020CN Sheet, solenoid damper Internal components (2 of 3) RC1-0340-020CN
Table 8-22 Numerical parts list (continued) 506 Part number Description Table and page RC1-3356-000CN Overlay, control panel, EN (LJ 4250/4350) Covers RG1-4201-000CN Cable, interface, upper, 500-sheet feeder (LJ 4200/4300) 500-sheet feeder (2 of 2) RG1-4202-000CN Cable, interface, lower, 500-sheet feeder (LJ 4200/4300) 500-sheet feeder (2 of 2) RG1-4204-000CN Cable, size-sensor, 500-sheet feeder 500-sheet feeder (2 of 2) RG1-4205-000CN Cable, fuser (LJ 4200/4200L) Internal components (3 o
Table 8-22 Numerical parts list (continued) Part number Description Table and page RK2-0269-000CN Solenoid, tray 2 pickup (LJ 4250/4350) Internal components (2 of 3) RK2-0272-000CN Motor, main (M101), 10–pin (LJ4250/4350) Internal components (1 of 3) RK2-0274-000CN Motor, print cartridge (M102), 8–pin (LJ 4250/4350) Internal components (1 of 3) RK2-0276-000CN Solenoid, tray 1 pickup (LJ 4250/4350) Tray 1 pickup assembly RK2-0278-000CN Fan, left (LJ 4250/4350) Internal components (3 of 3) R
Table 8-22 Numerical parts list (continued) 508 Part number Description Table and page RM1-0027-020CN Cover, rear output bin Covers RM1-0028-060CN 500-sheet universal replacement tray (LJ 4200/4300) 500-sheet feeder (1 of 2) RM1-0033-020CN Lifter-drive assembly (LJ 4200/4300) Internal components (3 of 3) RM1-0034-040CN Pickup drive assembly Internal components (2 of 3) RM1-0036-000CN Roller, paper-pickup Internal components (2 of 3) RM1-0037-020CN Roller, paper-feed Internal components
Table 8-22 Numerical parts list (continued) Part number Description Table and page RM1-1066-000CN Main drive assembly (LJ 4250/4350) (also see Figure 8-10 Main drive assembly) Internal components (1 of 3) RM1-1066-000CN Main drive assembly (LJ 4250/4350) Main drive assembly RM1-1067-000CN Laser/scanner assembly (LJ 4250/4350) Internal components (2 of 3) RM1-1070-000CN Power-supply assembly, 110-127 V (LJ 4250/4350) (also see Figure 8-9 Electrical components) Internal components (1 of 3) RM1-
Table 8-22 Numerical parts list (continued) 510 Part number Description Table and page RM1-1193-000CN Cable, envelope-feeder-connecting (LJ 4250/4350) Internal components (2 of 3) RM1-1195-000CN Control-panel assembly (LJ 4250/4350) Covers RM1-1198-000CN Cable, laser (LJ 4250/4350) Internal components (2 of 3) RM1-1216-000CN Cable, fuser (LJ 4250/4350) Internal components (3 of 3) RM1-1218-000CN Cable, power-supply inlet, 110-127 V (LJ 4250/4350) Electrical components RM1-1219-000CN Cab
Table 8-22 Numerical parts list (continued) Part number Description Table and page XB4-7300-809CN Screw, tapping, truss head, m3x8 Internal components (2 of 3) XB4-7400-809CN Screw, tapping, truss head, m4x8 Internal components (2 of 3) XB4-7401-007CN Screw, tapping, pan head, m4x10 Covers XB4-7401-007CN Screw, tapping, pan head, m4x10 Internal components (1 of 3) XB4-7401-007CN Screw, tapping, pan head, m4x10 Internal components (2 of 3) XB4-7401-007CN Screw, tapping, pan head, m4x10 In
512 8 Parts and diagrams
Index Symbols/Numerics 1,500-sheet feeder registration settings 71 1,500-sheet tray component locations 418 control PCA, removing 294 door, removing 290 feed rollers, removing 288 jams 373 lifter-drive assembly, removing 297 media size detection 119 media-size sensor, removing 296 paper-pickup drive assembly, removing 300 part numbers 489 pickup and feed operations 114, 128 printing from 74 rear cover, removing 291 right-side cover, removing 292 separation roller, removing 288 wiring diagram 431 1200 dpi r
classes 444 cleaning page automatic 73, 85 manual 83 cleaning stage, image-formation operations 159 cleaning the printer 82 clearable warnings setting 75 clutches pickup and feed operations 116 removing 277 tray 2 operations 119 cold reset 325 communication 162 communications troubleshooting 331 communications settings 77 CompactFlash cards accessing 9 models supporting 163 component locations 409, 454, 462 configuration page 63, 312 Configure Device menu 68 consumables.
E e-mail alerts 315, 317 EconoMode 162, 380 EconoMode setting 72 EIO cards configuration page 312 operations 163 part numbers 452 settings 77 EIO slots 163 electrical specifications 20 electrostatic discharge (ESD) 168 embedded Web server 315 energy specifications 20 ENERGY STAR compliance 44 engine-test page 329 envelope feeder envelope specifications 28 jam detection operations 133 pickup and feed operations 132 settings 64 wiring diagram 433 envelopes default size, setting 68 margins 35 specifications 26
HP Printing Supplies Returns and Recycling Program 45 HP Technical Training 444 HP Web JetAdmin firmware updates 100 HP-authorized resellers and support 445 humidity specifications paper, storing 30 printer requirements 24 I I/O menu 77 IBM OS/2 drivers 14 image quality. See print quality image-formation operations 106 image-formation system operations 153 Information menu 63 information pages 310 input trays. See trays input/output operations 162 installing printer 52 interface ports.
jam detection operations, trays 122 labels 36 letterhead 32 lifter-driver operations 120 multiple pages feeding, troubleshooting 375 pickup and feed operations 114 print quality, troubleshooting 377 selecting 25 size detection operations 119 sizes supported 26 skew prevention operations 121 skew, troubleshooting 376, 391 specifications 25, 30 stacker operations 137 stapler/stacker operations 142 storing 30 transparencies 36 tray 1 feeding operations 117 tray 1, types supported 26 tray 2 feeding operations 1
out of toner 76 output bins locating 9 paper path test 80, 369 removing rear 203 settings 69 output quality black pages 398 blank pages 399 blurred print 397 cleaning page 83 dark print 400 defect examples 382 distorted images 391 dots 385 dropouts 386 grey background 388 jams 378 light print 383 line 387, 396, 397 media problems 377, 379 print cartridge checks 380 repeating defects 390, 400 settings 72 toner smear 389 transparencies 378 troubleshooting 379 white lines 394 white spots 396 output-delivery as
HP-authorized resellers and support 445 service agreements 445 supplies ordering 446 photosensitive drum image-formation operations 106, 153 troubleshooting 380 physical specifications 18, 52 pickup roller, replacing tray 1 179 pickup-and-feed system operations 1,500-sheet tray 128 500-sheet feeder 125 about 106, 114 duplexer 134 envelope feeder 132 fuser/delivery block 122 jam detection, duplexer 136 jam detection, envelope feeder 133 jam detection, stacker 141 jam detection, stapler/stacker 152 jam detect
R RAM disk settings 76 Ready light 57 rear output bin locating 9 removing 203 settings 69 recovery, jam 76, 366 recycling 45 registration assembly operations 121 removing 266 registration settings 71 registration-roller assembly, locating 410 regulatory statements Canadian DOC statement 49 Declaration of Conformity 47 FCC 43 Finnish laser statement 50 Japanese VCCI statement 49 Korean EMI statement 49 laser safety 49 remote firmware updates downloading 91 FTP 93 HP LaserJet Utility 98 HP Web JetAdmin 100 LP
operating systems supported 12 solenoids 1,500-sheet tray 420 500-sheet feeder 417 removing 274 stacker and stapler/stacker 423 stacker operations 137 tray 2 operations 119 space requirements 18, 52 special media envelopes 34 labels 36 transparencies 36 specifications 1,500-sheet tray 28 accessories 19 acoustic emissions 22 card stock 37 electrical 20 envelope feeder 28 envelopes 34 environmental 52 labels 36 media 25 operating environment 24 paper 30 physical 18 speed 24 transparencies 36 trays, media supp
top output bin locating 9 settings 69 transfer roller image-formation operations 153 locating 411 operations 106 replacing 177 transparencies fuser modes 71 print quality, troubleshooting 378 specifications 36 tray 1 custom-size settings 69 jam detection operations 123 jams 371 locating 9 paper sensor (PS105), removing 272 paper supported 26 paper-pickup assembly, removing 257 pickup and feed operations 114, 117 pickup assembly 410 pickup assembly, diagrams and part numbers 480 pickup roller, locating 411 p
parts ordering 444 UNIX and Linux drivers 13 weight, paper specifications 1,500-sheet tray 28 500-sheet tray 27 duplexer 28 envelope feeder 28 equivalence table 32 stapler/stacker 29 tray 1 26 tray 2 27 white lines, troubleshooting 394 white spots, troubleshooting 396 Wide A4 settings 69 Windows downloading firmware 91 drivers supported 13 FTP firmware updates 93 local port firmware updates 92 LPR command firmware updates 99 network firmware updates 93 versions supported 12 wiring diagrams 425 wrinkled medi
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