Instruction/ maintenance manual of the product C3952A HP (Hewlett-Packard)
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Combined Service Manual HP LaserJet 4 / 4M (C2001A / C2021A) HP LaserJet 4 Plus / 4M Plus (C2037A / C2039A) HP LaserJet 5 / 5M /5N (C3916A/C3917A/ C3952A).
© Copyright Hewlett-Pack ard Company 1996 All Rights Reserved. Reproduction, adapt ation, or translation without prior writ ten per mission is prohibited, except as allowed under the copyright laws.
Conventions This manual uses the following conventions: Unless specifically stated otherwise, information applies to all seven printer models (LaserJet 4/4 Plus/4 M/4 M Plus/5/5 M/5 N). Most procedures are combined for all pr inters, except where they differ substantially .
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Contents 1 Product Information Product Family Information . . . . . . . . . . . . . . . 1-2 Identification . . . . . . . . . . . . . . . . . . . . . . . 1-3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . 1-5 HP LaserJet 4 and 4 Plus . .
Control Panel Key s . . . . . . . . . . . . . . . . . . . 3-2 Reset Menu . . . . . . . . . . . . . . . . . . . . . . . 3-5 Control Pa nel Menus . . . . . . . . . . . . . . . . . . . 3-6 Printer Feat ures . . . . . . . . . . . . . . . . . . . . . . 3-13 Page Protection (HP LaserJet 4 only) .
Printer Drivers . . . . . . . . . . . . . . . . . . . . . . . 3-41 Install Printer Drivers and Utilities . . . . . . . . . 3-41 How to Obtain Printer Drivers . . . . . . . . . . . . . 3-41 DOS Utilities . . . . . . . . . . . . . . . . . . . . . . . . 3-42 Packing the Printer .
Removing th e Transfer Ro ller . . . . . . . . . . . . 4-16 Replacing th e Transfer Roller . . . . . . . . . . . . 4-16 5 Functional Overview Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 DC Controller System . . . . . . . . . . .
6 Removal and Replacement Required Tools . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Hardware Rev iew . . . . . . . . . . . . . . . . . . . . . . 6-2 Removing the Covers . . . . . . . . . . . . . . . . . . . . 6-4 Right Side Co ver Removal . .
Removing the High Volta ge Contact Assembly and Feed Guide Assembly . . . . . . . . . . . . . . . . 6-67 Replacing the High Voltage Contact Assembly/Feed Guide Assembly . . . . . . . . . . 6-68 Interconnect PCA Removal . . . . . . . . . . . . . . . 6-69 7 Troubleshooting LaserJet 5 Error Map .
Drum Rotation Functional Check . . . . . . . . . . . 7-50 High Voltage Power Supply Assembly . . . . . . . . 7-51 Interface Troubleshooting . . . . . . . . . . . . . . . . . 7-52 Communications Check . . . . . . . . . . . . . . . . 7-52 Test Message .
Removing th e Paper Guid e Assembly . . . . . . . . . A-16 Removing the Paper Roller . . . . . . . . . . . . . . A-17 Removing the Control PCA . . . . . . . . . . . . . . A-20 Removing th e Power PCA . . . . . . . . . . . . . . . A-22 Removing the Holding Tray Center Paper Guide .
To Print Using the Infrared Port . . . . . . . . . . . . B-36 Troubleshooti ng IR Printing P roblems . . . . . . . . B-38 Infrared Port Not Respond ing .
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1 Product Information Features HP LJ 4 HP LJ 4M HP LJ 4 Plus HP LJ4M Plus Model C2001A C20 21A C2037A C2039A Printer Speed 8 ppm 8 ppm 12 ppm 12 ppm Resolution 300/600 dpi 300/600 dpi 300/600 dpi 300/.
Product F amily Information The model HP C2021A is identic al to the model HP C2001A fr om a hardware standpoint, as is the model HP C2039A to the model HP C2037A.
Identification The model number is on a label p laced on the ou tside, rear c over of the printer. The model num ber (C2001A, C 2021A, C203 7A or C2039A) is found at the top of the label. The model number is the base number for all printers. The serial number contains information about the printer Country of Origin.
Figure 1-2 Printer I dentification Lab el for the HP La serJet 4/4M 1-4 Product Information.
Specifications HP LaserJet 4 and 4 Plus Dimension HP LaserJet 4/4M (C2001A/C2021A) HP LaserJe t 4 Plus HP LaserJet 4 M Plus (C2037A/C2039A) Width 16.4 in (416 mm) 16.4 in (416 mm) Depth 15.9 in (403 mm) 15.9 in (403 mm) Height 11.7 in (297 mm) 11.7 in (297 mm) W eight (with toner car tr idge) 37 lbs.
Status 100/115 V 4/4M 4 Plus/4M Plus 220/240 V 4/4M 4 Plus/4M Plus Product Rating 6.4 amps 7.8 amps 3.1 amps 4.0 amps P eak Inr ush Current 22 amps 22 amps 22 amps 22 amps 25% Deca y Time 13 msec 18 m.
Related Documentation The following manuals can be ordered from Hewlett-Packard’s Support Mate rials Organi zation (SMO). The ph one number for SMO is (800) 22 7-816 4.
Safety Information Product and Laser Safety HP printer s are UL 1950 listed, CSA 22.2 950 certified, and manufactured in accordance with DIN IEC 950. The printers are certified as “ Class 1 ” laser products under th e U.
FCC RFI Statement This equipment has been tested and found to c omply 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 when the equipment is operated in a commercial envi ronment.
Laser Statement (Swede n/Finland) LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP LaserJet(s) 4/4M, 4 Plus/4M Plus laserkirjoitin on k ä ytt ä j ä n kannalta turvallinen luokan 1 laserlaite. Normaalissa k ä yt ö ss ä kirjoittimen suojakotelointi est ää lasers ä teen p ää syn laitteen ulkopuolelle.
T oner Safety Note Toner may stain clothing. Skin an d clothing a re best cleaned by rem oving as much toner as possible with a dry tissue, then washing with cold water.
Doing Business with HP T echnical Assistance HP ASAP 1-800-333-1917 (U .S.) HP ASAP (Automated Support Access Program) pr ovides free technical support information 24 hours a day, 7 days a week. The ASAP system includes HP FIRST an d HP AUDIO-TIPS, both explained b elow.
HP AUDIO-TIPS HP AUDIO-TIPS, available within HP ASAP, is an interactive voice response sy stem providin g pre-recor ded answers to the questions most frequently asked by HP LaserJet printer users. Helpful “ System Maps ” to the HP AUDIO-T IPS recordings a re available by fax through HP FIRST.
European Customer Support Center The HP Europe an Customer Supp ort Center, located in Amsterdam, Holland, is op en from 8:30 am t o 6:00 pm central European time (Wednesdays until 4:00 pm). Multilingual customer support representatives can answer technical questions similar to the U.
2 Site Planning and Requirements Site Requirements The environmental specifications, listed in the Specifications section of Chapter 1, must be maintained to ensure the proper operation of th is printer. Consider the following points before installing the printer: • Install the printer in a well-ventilated area.
Printer Space Requireme nts Figure 2-1 Space Requirements 2-2 Site Planning and Requir ements.
Print Media Specifications The complete media specifications are listed in the HP LaserJet Family Paper Spe cification s Guide (part no. 5961-0920), that came with thi s manual.
Note Printing heavy p aper stock (gr eater than 24 l b. (90 g/m 2 ) from the 500-sheet Lower Cassette specifically is not supported. Media S ize Capacity Weight/Thickness Range P aper Letter , A4, Exe.
Adhesive Labels Note Printing labels u sing the Duplex Assembly , the 500-sheet Lower Cassette (Tray 3) or the PC tray (Tray 2) specifically is not supported.
Overhead T ransparencies Note Printing overhead transparencies using the Duplex Assembly, the 500-sheet Lower Cassette (Tray 3) or PC tray (Tray 2) specifically is not supported. Overhead transparencies used in HP LaserJet printers must be able to withstand the 392 ° F (200 ° C) temperature encountere d in the pri nter ’ s fusing process.
Envelope Construction The following table list s the kinds of en velopes you ca n print in the MP Tray (Tray 1). See the HP LaserJ et Family Paper Specificatio ns Guide for more information. Item Specific ations Minimum envelope siz e 3.5 in x 7 in (86 m m x 178 m m) Maximum envelope size 7.
2-8 Site Planning and Requir ements.
3 Configuration Introduction The Configuration of the printer consists of setting hard and soft user defaults, and setting up the host computer to communicate with the printer (System Configuration). For installation instructions refer to Installation in the Getting Started Manual that is shipped wit h the prin ter.
Using The Control P anel (See Appendix B for LaserJet 5 i nformation.) The control pa nel (see Figure 3-1) consists of eight keys, t hree indicator ligh ts , and a 16-character display panel. The thr ee indicator lights are described in Table 3-1. Control Pane l Keys There are two ro ws of control pa nel keys.
Indicator Mode Description Ready On: Ready to print. Flashing: Processing a print job. Do not take off line or switch off. Off: Not ready; see displa y for message. On Line On: Ready to receive data. Flashing: Going from on line t o off line. Off: Off line.
Key Function [On Line] Switches the pr inter between ON LINE (communicating with the computer or other data source) and OFF LINE (not communicat ing). For the printer to receive data, both the On Line a nd Ready indicator lights must be on. [Form Feed] Prints any data rema ining in pr inter’ s buff e r .
Reset Menu Use Reset Menu function with caution. It can result in loss of buffered page data or printer configuration data. Reset Menu is activated by holding down both [Shift] and [Menu] for up to 10 seconds until RESET=MENU * appears. Use [+] or [-] to cy cle through items and [Enter] to select the item.
Control P anel Menus Figure 3-2 shows t he menus and men u items available with the basic printer configuration. Not all menu items are discussed in this section. Only those items of specific interest from a service standpoint, or items new to the printers are discusse d in this section.
Figure 3-2 Control Panel Map Configuration 3- 7.
Item Optio ns Explan ation COPIES 1* to 999 Select any number from 1 to 999. PAPER ENVELOPES LETTER* (110V printers), LEGAL , A4* (220V printers) EXEC COM10 * (110V printe rs), MONARCH, DL* (220V printers), C5, B5 Sets def ault ima ge siz e, unless software setting ov errides it.
Item Optio ns Explan ation FONT SOURCE I* C S Mn (1-4) Inter nal fonts* Car tridge fonts P er manent soft fonts SIMM Modul e: n =s lot number . T ypefaces stored in one of the four ROM SIMM slots (M1=slot 1, for example). FONT NUMBER 0* to 999 Number assigned to e ach typef ace.
Item Optio ns Explan ation MP TRAY FIRST* CASS MANUAL P ape r is selected first. Operates as a PC tray . Operates as a manual feed tray . LOCK NONE* MP PC LC and combination s No tra ys are lo c ked out. The MP tray is lock ed out. The PC tray is loc ked out.
Item Options Explanation IO BUFFER AUTO* OFF ON Memor y is automatically determ ined by the printer . No memor y is set aside. Size can be manually adjusted IO SIZE 10K an d up With IO BUFER ON , adjust size in increments of 10. RESRCSAVE AUTO* OFF ON Sav es resources and extra memor y and personality SIMM a re installed in printer.
Item Options Explanati on SERIAL RS-232* RS-422 (HP LJ 4 only) U se the RS-422 whe n a longer cable is needed. PACING DTR/DSR* XON/XOFF Use if the compute r requires hardware flow control.
Printer F eatures Some of the important f eatures of th e HP LaserJet 4, 4 Plu s, and LaserJet 5 printers are described below. P age Protection (HP LaserJet 4 only) Note The defa ult is PAGE PROTECT=OFF*. Unless you frequently get 21 PRINT OVERRUN messages, you may not need to set a value for page protection.
Resource Saving (HP LaserJ et 4 Plus and 5 only) Resource Saving gives the printer the ability to save certain entities such as permanent soft fonts, macros, symbol sets and user-defined g raphics patter ns when th e printer changes personalities, resolutions or page protect modes.
I/O Buffering (HP LaserJet 4 Plus and 5 only) I/O buffering allows the user to allocate printer memory to hold the job while it prints, freeing up the host system sooner, like a print spooler.
EconoM ode (HP LaserJet 4 Plus and 5 on ly) The EconoMode setting uses approximately 50% less toner than standard mode pr inting by redu cing dot density .
Memory Enhancement technology (MEt) (HP LaserJet 4 Plus and 5 only) HP Memory Enhancement technology (MEt) effectively doubles the pri nter ’ s standard memor y through a va riety of fo nt and data compression methods. MEt also automatically compresses fonts for desktop publishing applications.
Network Security The HP LaserJet 4 Plus and 5 printers allow the System Administrator to lock out other user ’ s ability to change most printer control panel settings. This is done by setting a password and turnin g LOCK on. The message MENU LOCKED will appear when a user tries to change the printer control panel settings.
5 Under the Extras menu, select Set Printer Password . On the Printer Security screen, enter the new password (numeric values can be set f rom 0 to 65535) , and click on th e OK button. HP JetAdmin Utility (Novell Networks) 1 Run JETADMIN. 2 Select the printer you wa nt to confi gure.
Service Mode (Refer to Appendix B for LaserJet 5 information.) The Service Mode s hould be used only by authorized s ervice personnel. Th e following can be executed wh ile in the Servic e Mode: • Print a Service Mode Self Test. • Verify the Page Count, (the page count also is displayed on the standard self test).
Setting the P age Count The page count is stored in the printer ’ s Non-Volatile Memory (NVRAM). If it is necessary to replace the Formatter PCA, the page count should be reset to the printer ’ s original page count to reflect the age of the print engine.
Setting the Cold Reset Default The default paper size outside of the U.S. is typically A4. Therefore, when replacing Formatters where the desired default is A4, the Customization Variable must be set to A4. This prevents the Cold Reset procedure from resetting the paper size to Letter.
Cold Reset The Cold Reset feature of the printers allows the printer to be returned instantly to the factory default configu ration settings. This feature is valuable bec ause the the D ynamic I/O and PJL features of the prin ter enable any user connected to any I/O t o access and change the default configuration as applications require.
Understanding the PCL Self T est Printout (Refer to Appendi x B for Las erJet 5 informatio n.) Item Figure 3-3 Explanation 1 Standard Menu Selection s: Shows standard m enu selections, such as Printing Menu and PCL M enu, and menu items, such as Copies and MP tray , in the order they appear in the contro l panel display .
2 1 2 3 4 5 6 7 8 9 1 1 10 Figure 3-3 HP LaserJet 4/4M PC L Self Test P rintout Configura tion 3-25.
Item Figure 3-4 Explanation 1 Standar d menu selections: Lists selections in the order in which they appear in the cont rol panel display . 2 Optional menus: Shows optional menu selections, such as the P ostScript Menu, and menu item s, in the order in which they appear in the control panel display .
Figure 3-4 HP LaserJet 4 Pl us/4M Plus PCL Se lf Test Printout Configura tion 3-27.
Changing the Control P anel Display Language The default control panel display language is set for English. Supported languages are: English, French, German, Italian, Spanish, Finnish, Danish, Dutch, S wedish, No rwegian, and Portuguese. Follow these instructions to change the display language.
T est Print Button The Test Print button access hole is located on th e side of the printer. Press the Test Print button using a tool similar to a paper clip (see Fig ure 3-5).
Pressing the Test Print button wil l initiate a 15 ENGINE TEST . This is an engine test only. The Format PCA is bypassed while printing this test, although a formatter problem can interfere with this test . A page of vertical lines is printed if the print engine is operating cor rectly (see Figur e 3-6).
System Config uration MS-DOS System Configuration To communicate properly with the p rinter, the MS-DOS environment requires the addition or modification of MODE commands in the AUTOEXEC.
Serial MS-DOS Commands Most IBM compatible computers default to a parallel printer port. To ensure that infor mation is sent to your serial printer por t, type the following MS-DOS commands at your MS-DOS prompt, or include them in your AUTOEXEC.BAT file.
Printer I/O Configuration P arallel Menu The default setting for t he High Speed Parallel I/O is YES. If it is set to NO, the interface runs at a slower speed that is compatible with older computers. When the default is set to YES, the parallel interface runs at a hi gher rate supported by newer com puters.
Pacing (Handshaking) Pacing (or “ handshaking ” ) is a type of c ommunication between the printer and the computer. This is an important item in the printer because it allows the printer to tell the computer when to send information.
Serial Cable Pin-outs The following cable diagrams show the cable pinouts for the most common serial configurations. DB-9 RS-232 Serial Connection — HP LaserJet 4 If the computer has a serial port with 9 pins, use the cab le or equivalent for the HP LaserJet 4.
DB-25 RS-232 Serial Connection — HP LaserJet 4 Plu s/5 If the computer has a serial port with 9 pins , use the C2932A or equivalent cable for the HP LaserJet 4 Plus.
DB-25 Seria l Connection — HP Las erJet 4 If the computer has a seria l port with 25 pins, use the 17255D cable or eq uivalent f or the HP LaserJet 4.
DB-25 RS-232 Serial Connection — HP LaserJet 4 Plu s/5 If the computer has a serial port with 25 pi ns, use the C2933A or equivalent cable for the HP LaserJet 4 Plus.
RS-422A Serial Connection (Not available on the HP LaserJet 4 Plus or 5 printe rs) If you are configuring the computer to use an RS-422A serial port, you need a special cable . Contact the comput er or printer network manufacturer to see if an RS-422A cable is a vailable.
Modular I/O Configuration The printers are equipped with a modular I/O slot. A m odular I/O interface card can be plugged into that slot to increase the number of interfaces available. A modular I/ O card can pr ovide incr eased printer performance when printin g from a networ k.
Printer Drivers Install Printer Drivers and Utilities Printer drivers are specialized programs designed to allow specific software applications to function with the HP LaserJet printers.
DOS Utilities Use the DOS Utilities to install printer drivers for MS-DOS applications. Printer driver software for some common software applications are included the DOS Utilities. See the Doing Business With HP section of Chapter 1 for information on software drivers not included with the LaserJet DOS Utilities.
P acking the Printer Repackaging Instructions The printer wa rranty is for one -year and m ust be returned t o an Authorized HP service c enter for service . If the or iginal packa ging material is no longer a vailable, replace ment packing and shipping material is available from HP ’ s Support Material Organization (SMO) for a charge.
Installing The Optional Lower Cassette Note Please see also the Service Notes section for proper use a nd adjustment of the lower cassette. These printers have an optional 500-sheet Lower Cassette which is installed in the field. Follow these instruc tions to install the Lower Cassette.
Loading P aper into the Optional Lower Cassette Figure 3-13 Pull the cassette tray stra ight out of the pri nter. Figure 3-14 Adjust the cassette for the paper siz e you want to load.
Figure 3-15 Slide about 450 sheets of p aper into the tray, up against the adjustable brack et that sets the paper length. Figure 3-16 Press down on the stack of paper until the top of the stack fits under the top edge of the back green bracket.
Figure 3-17 Push down the left corner of the st ack until t he paper is secured undered the metal clip. LETTER EXEC A4 LEGA L Figure 3-18 Set the knob on the top right of the cassette to the paper size you have loaded.
Figure 3-19 Note: cassette MUS T be full before adjusting the tension. To adjust the tension, tap the stack of paper several times and turn the leftmost knob on the cassette until t he arrows on the i ndicator align. Tap the stack again and verify the arrow s are still aligned.
Envelope F eeder Installation For complete information about installing the Envelope Feeder, see Envelope Feeder User’s Guide . T his guide is provided with the envelope feeder . The instruc tions below are not intended to replace the information of the Envelope Feeder User’s Guide .
4 Insert the Envelope Feed er firmly into the pr inter (see Figure 3-22) . 5 Turn ON th e printer. LaserJ et 4 and 4 Plus The envelope size ( EE TRAY= ) appears on the display when the envelope feeder is installed and loaded with envelopes. The envelope size can be selected through the Control Panel.
SIMM Installation SIMM installation is covered in detail in the the printer ’ s User ’ s Manual and in th e kit that acc ompanies the SI MM. The instructions sh own here are not intended to rep lace these source s. Follow these instructions to install memory, language, and flash SIMM boards.
Any SIMM board can be installed i n any of the four SIMM slots. Because the slots are close together, we recom mend installing them from right to left, starting with slot 1 and ending with slot 4.
Memory Requirements A page ’ s complexity (rules, graph ics, or dense text) may excee d the pri nter ’ s ability to create the im age rapidly enough to keep pace with the printing process. If a page is too complex, only part of the page prints, and some print data loss is likely.
Caution When removing a boa rd from the ant istatic package, avoid touching the metal traces on the SIMM board . For memory boards, compare the part number on the outside of the package to the pa rt number in the table below . If you have not received t he correc t board, notif y your a uthorized Hewlett-Packard dealer immediately.
Accessing the SIMM Slots Please refer to Chapt er 6, Removal and Replacement, fo r instructions on removing the SIMMS door to access the slots. Note that access to the SIMM s lots are slightly differe nt for the various printer models.
3 Hold the SIMM board at a 30-degree angle to the slot a nd push the edge of the board evenly and firmly into the slot (see Figure 3-25 callout (A) ). 4 Rotate the SIMM board to the right until the board “ clicks ” into the metal locking tabs, securing the board into place (see Figure 3-25 callout (B) ).
T esting a SIMM Board Use the procedures below to print a self-test page to verify SIMM board installation. Procedures are given for both memory and PostScript SIMMs. Memory SIMM Note For the LaserJet 5/ 5M/5N, the On Line key ha s been replaced by the Go key.
P ersonality S IMM (P ostScript) A personality (printer language) SIMM installation can be verified as outlined below (a PostScript S IMM is used in this example ). Note For the LaserJet 5/5M/5N, the On Line key has been replaced by the Go key. The Enter key has been replaced by the Select key.
T roubleshooting a SIMM Board For more information about the service/error messages below, see Chapter 7, Troubleshooti ng . Service / Error Mes sages One of two messages can be generated when your printer is checking its SIMM in ternal memory. 61.X SERVICE where X = 1, 2, 3 , or 4 This error indicates a SIMM parity error.
3-60 Configuration.
4 Preventive Maintenance Introduction The printer requires minimum routine m aintenance. Us e this chapter for information on: • Service Checkpoin ts. These are th e items that must be cleaned and c hecked when the T oner Cartri dge is replace d, or before performing periodic maintenance.
Life Expectancy of Consumables Always inspect the c omponents listed in Table 4-1 for wear when servicing th e printer. Rep lace these componen ts as needed, b ased on printer failures or wear, not strictly on usage. DESCRIPTION QTY EST. LIFE (pages) REMARKS 1.
Service Checkpoints This is a fold-out pag e 3 panels wide. Figure 4-1 Maintenance Checkpoints Preventiv e Maintenan ce 4-3.
Cleaning Y our Printe r When it is time to replace the toner cartridge, perform the cleaning procedures outlined in Figure 4-1. 4-4 Preventive Main tenance.
T oner Cartridge The toner cartridge i n your printer contains the printing mechanism and a supply of toner. Your toner cartri dge life depend s on the amount of ton er your jobs requ ire. Wh en you print word-processed text, a toner cartridge lasts approximately 6,800 pages, printed at 5% coverage.
Saving T oner with EconoMode (HP LaserJe t 4 Plus and 5 Only) Toner cartridge life can be extended dramatical ly by using the EconoMode pr inting featu re of the p rinter. Econ oMode can be turned on or off via the printer control panel, through HP ’ s Remote Control Panel or through a software application with the appropriate p rinter driv er.
Installing the T oner Cartridge The toner cartridge is empty and must be replaced w hen the toner low message cannot be cleared, as described in “ Clearing the 16 TONER LOW Mess age ” later in this section. To replace the toner cartridge: 1 Open the pr inter ’ s top cover and remo ve the em pty toner cartridg e.
3 Remove the sealing tape b y firmly grasping the tab on the right side of the toner cartridge and pulling it straight out the side of the ca rtridge. (See Figure 4-3. ) Note Pulling the toner cartridge at an a ngle may damage the toner cartridge seals.
Non-HP T on er Cartridges While Hewlett-Packard does not prohibit the use of Non-HP toner cartridges during the warranty period or while under a maintena nce contract, we do not rec ommend their use.
Clearing the TONER LOW Message If the 16 TONER LOW message appears in the control panel display, the toner level in the toner cartridge is getting low. The print becomes lighter and white streaks may appear. (This message means that it is t ime to replac e the toner car tridge).
P eriodic Maintenance Procedures Each paper source has a Paper Pickup Roller that should be replaced when paper no longer feeds reliably. The MP Tray (Tray 1) Paper Pickup Roller is shown in Figure 4-5. The PC tray (Tray 2) Pickup Rol ler is s hown in Fi gure 4-7, t he LC (Tray 3) Pi ckup Roller is shown in Figure 4-8.
4 Insert a small screwdriver into the indent at the front of the separation pad and gently lift the pad from its s eat (see Figure 4-6). 5 Discard the used roller and pad.
Removing the PC (Tray 2) Pickup Roller The PC Pickup Roller is underneath the printer (see Figure 4-7). To remove the Picku p Roller: 1 Turn OF F and unpl ug the powe r cord from the re ar of t he printer. If your interface cable is long eno ugh, it may stay attached, if not, remove it also.
Removing the Lower Cassette (LC) or (T ray 3) Pickup Roller If your printer is equipped with the Lower Cassette Assembly, proceed as follows: 1 Remove the Lower Cassette Tray. 2 Press the retainers that hold the roller in place (see Figure 4-8 ). 3 Slide the Pickup Roller off the shaft.
Removing and Replacing the Transfer Rolle r The Transfer Roller is the black sponge-rubber roller located inside the printer just to the front of the black plastic Paper Feed Guide (see Figure 4-9). To re move and replac e the Transfer Roller, follow these steps.
Removing the Tra nsfer Roll er 1 Turn OFF and unpl ug the printer. 2 Open the printer ’ s top cover. 3 Remove the Toner Cartr idge. 4 Use the hook inside the top cover to remove the Transfer Roller as follows. Hook the left side of the chrome rod beside the sponge roller, and lift the roller out.
5 Functional Overview Introduction This section of th e manual presents a function al overview of th e printers. I t provides the Service Represen tative with a n understanding of the printing process. Re fer to the block diag ram of Figure 5-1 to see the relationship of the parts as a whole.
DC Controller System The DC Controller PCA is respon sible for coordinatin g all activities involved in the printing process. The DC Controller enables the dri ve circuitry for the laser b eam, and c oordinates print d ata from the Formatter PCA with pa per size, laser beam motion, the high voltage system, fuser temperature, and motors.
DC Controller Loads Figure 5-1 DC Controller Loads Functional Overview 5-3.
Serial Data Communication The printer communicates with and controls the Paper Feeder, the Lower Cassette Assembly, and the Envelope Feeder through serial data lines SLI and SLO. In addition, the DC Controller uses information encoded on SLI from the High Voltage Transformer to m onitor the toner lev el.
Solenoids Solenoids are co ntrolled by th e DC Control ler. Each solen oid drives a specific roller (see Table 5-1). The DC Controller outputs +24B VDC to energize th e solenoids at the pr oper time. When either of the doors are ope n, the +24B VDC is remo ved and the solenoids are disabled.
Photose nsors Photosensors, monitored by the DC Controller, are responsible for detecting the presence of paper, paper motion, and timing. (See Table 5-2.
Sensor Descrip tion PCA PS1 Input/Registratio n Sensor - detects pap er in pickup area Paper Control PCA (J605) PS2 PC tra y (T ray 2) P aper-out Senso r - detects the presence of pa per in the PC tray . Paper Control PCA (J605) PS3 Output/Fuser Exit Senso r - detects paper in fuser .
Microswitches All microswitch conditions are monitored by the DC Controller over serial data lines SLI and SLO. The Sta te Machines on the individual c ontrol PCAs, (for example the Paper Control PCA) convert the switch condition to a digital logic level, and encode that information on the data stream for th e DC Controller t o use.
PC (Tray 2) and LC (T ray 3) T ray Size Sensing System Trays inserted into the printer trigger specific microswitches, which define the tray size (see Table 5-4).
Motors The DC Controller c ontrols the Exhaust Fan, th e Main Motor, and the Laser/Scanner Motor. The remaining motors and solenoids are controlled by State Machines on the motor’s assembly. The condition of these motors and solenoids is monitored by the DC Controller through serial data lines.
P aper Jam D etection The Input/ Registration Sensor (PS1) and the Paper Ex it Sensor (PS3) detect paper moving through the printer. If a paper jam is detected, the DC Controller PCA immediately stops the printing process and 13 PAPER JAM or REMOVE PAPER JAM message is displayed.
F ormatter System The formatter is responsible for the following: • Receiving and processing ASCII data from printer interfaces. • Monitoring front panel input and relaying printer status information (through the front panel and bi-directional I/O).
Figure 5-5 For matter PCA—Funct ional Areas Functional Overview 5-13.
Memory Management The printer uses several di fferent types o f memory. T his memory can be divided into two different categories, Read Only Memory (ROM) and Random Acc ess Memory (RAM). ROM memory consists of the m emory located on the Fo rmatter PCA a nd any font cartridges that may be installed in the printer.
PJL Overview Printer Job Language (PJL) is an integral part of configuration, in addition to the standard Printer Command Language. With standard I/O cabling, PJL allows the printer to perform functions such as: • Allowing the printer to talk to the host computer through a Bi-directional parallel connection.
Image F o rmatio n System Laser printing requires the interac tion of several different technologies (such as electron ics, optics, and electro-photog raphics) t o provide a prin ted page. Ea ch process functions independently an d must be coordinated with all other printer processes.
Photosensitive Drum The photosensitive drum is the “ heart ” of the Image Formation System. The special properties of this drum allow an im age to be formed on the drum ’ s surface and then transferred to paper. The drum is an extruded aluminum cylinder.
Cleaning Stage During the cleaning stage of the image formation process, the drum ’ s surface is physically cleaned, prepar ing it to hold an image. During printing, th e drum is rotating c onstantly making several complete rotations per printed page.
Conditioning Stage After the drum is physically cleaned, it must be conditioned. This process consists of applying a uniform negative charge on the surface of the drum with the primary charging roller, located in the toner cartridge.
Writing Stage At the writing station, the laser beam is used to discharge the drum ’ s negative poten tial by focusin g laser light on to areas of the photosensitive drum. This creates a latent electrostatic image, which later is developed into a visible image.
At the be ginning of eac h sweep (b efore the beam reache s the drum), the beam is reflected off the beam detect mirror. The momentary puls e of light is sent to the DC Controller, w here it is converted to an electrical signal used to synchronize the output of data ( VDO) for one sweep (scan l ine).
Developing Stage The developing station develops the latent electrostatic image into a visible image on the drum. The developing unit consists of a metallic cylinder that rotates around a fixed magnetic core inside the toner cavity.
The DC bias of the developing cylinder is adjusted to change the force of at traction between the toner a nd drum by changing th e print density setting from the control panel. A change in DC bias causes either more or les s toner to b e attracted to the drum, which in turn either increases or decreases the print density.
T ransferring Stage At the transferring station, the toner image on the drum ’ s surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the ne gatively charged toner on the drum ’ s surface to be attracted to the page.
Fusing Stage At the fusing station , the toner is fused in to the paper by heat and pressure to prod uce a perm anent image . The paper passes between a heated fusing roller and a soft pressure roller. This melts the toner and presses it into the paper.
P aper F eed System Note The LJ 5 printer design ators differ a s follows. LJ 4 / 4 Plus Multipur pose (MP) T ray Paper Cassette (PC) T ray Lower Cassette (LC) T ray LJ 5 T r a y 1T r a y 2T r a y 3 T.
The Paper Feed Assembly perfor ms horizonta l registration of the print media through the Oblique Rollers. As the print media passes through the Ob lique Rollers, the media is moved uniformly to the left sid e of the print path. The movement ensures that each print image is orient ed properly on the horizontal axis.
Figure 5-17 Paper Feed Assembly (Sectional V iew) Part Descriptio n PS1 Leading E dge Regist ration Sensor PS2 PC T ray (T ray 2) P aper Out Sens or PS3 Exit Sensor PS4 MP T ra y (T ra y 1) P aper Out.
Printing from the MP T ray (Tray 1) MP tray selection is provided b y the Formatter PCA, as configured by the operator ’ s control panel or by a so ftware application. The MP tray (Tray 1) feed system ’ s paper motion begins when the DC Con troller PCA, after receiv ing a PRNT signal, starts the Scanner Motor (M5) and the Main Motor (M1).
Printing from the PC T ray (T ray 2) PC tray selection is provided by the Formatter PCA, as configured by the control panel or by software. When the DC Controller PCA receives a PRNT signal, it s tarts the Scanner Motor (M5) and the Main Motor (M1).
Po w e r S y s t e m When the main power s witch is turned ON, the AC Power S upply provides AC voltage to the DC Power Supply and the fuser assembly heat lamp. The paper path doors must be closed to activate the AC power supply door switches before voltage is provided to the heat lamp.
Figure 5-20 Power System Block Diagram 5-32 Functional Overview.
Basic Sequence of Operation The Formatter PCA and the DC Controller PCA share information during printer operation. Con nector J7 on the formatter and connector J207 on the DC controller form a link which operates as a serial data bus. This allows printer status, command information, and dot-image data to be passed between both controllers.
6 Each time the for matter receive s a synchron ized BD signal from the DC controller, t he formatter sends a VI DEO data stream ( VDO) to the DC controller. 7 After the DC controller rec eives the VD O data, the DC controller transla tes it into a VIDEO OUT signal ( VDOUT) that switches the las er diode ON and OFF.
This a 2 panel pu ll-out. Figure 5-21 MP Tray Timing Diagra m — HP LaserJ et 4/4M Functional Overview 5-35.
This a 2 panel pu ll-out. Figure 5-22 MP (Tray 1) Timing Di agram — HP L a serJet 4 Plus/4M Pl us/5/5M/5 N 5-36 Functional Overview.
W armup P eriod The Warmup period begins when the printer ’ s power is turned ON, and ends when the f using roller temperature reaches 1 72 ° C. When the printer is switched ON, the exhaust fan (FM1 ) begins low-speed rotation and the fusin g roller maintain s 172 ° C.
Initial Rotation P eriod When the DC controller recei ves a PRINT signa l ( PRNT) from the formatter, the DC controller allows the fusing roller to begin warming up to approximately 183 ° C, and starts t he main m otor (M1), the pickup motor (M2), and scanner motor (M5).
If a failure occurs during this period, the following errors may be displayed : 50 SERVICE This error occurs when the fusing roller fails to reach the correct temperature in the required time (see “ 50 SERVICE ” ) in Chapter 7).
Print P eriod When the leading edge o f the paper activates the input/registration sensor (PS1), the DC controller forces the laser diode ON until a BD signal is r eceived. Next, th e DC contro ller receives a VIDEO data stream ( VDO) from the formatter.
The formatter then sends VDO data to the DC controller. The DC controller translates the V DO signal into a VIDEO OUT signal ( VDOUT), which mod ulates the laser diode ON an d OFF, creating intermittent bursts of laser light that are reflected off the scanner mirror and onto the photosensitive drum to form a latent electrostatic image.
Last Rotation P eriod After printing is complete, the Last Rotation period begins, during which residual static charges are eliminated from the photosensitive drum to prepare for the next printed page. About 1.7 seconds after the Last Rotation period begins, a nominal standby voltage is applied to the transfer roller to stop the toner attraction.
6 Removal and Replacement This chapter describes the complete disassembly of the printer from the beginning. In every instance, tasks that must be performed before beginning the procedure are listed first. Remove the assemblies in the order listed to prevent damage during re -assembly.
Required T ools Hardware Review All screws used in the printer are Phillips head, which require a Phillips screwdriver. Figure 6-1 shows the difference between a Phillips and a Pozidriv screwdriver. Note that the Phillips tip has more beveled su rfaces.
Table 6-2 describes th e screws used in the print ers, and p rovides guidelines to help determine where each type of screw is used. The screws can va ry in length de pending on the t hickness of the material being fastened.
Removing the Covers Right Side Cover Removal LJ 4/4 Plus 1 Open the Top Cover an d release the Righ t Side Cover by pressing at the points shown in Figure 6-2. 2 Fold the cover away from the printer to release the bottom supports and lift the door off of the printer frame.
T op Cover Removal 1 Open the Top Co ver. 2 Remove the Right Side Cover. 3 Open the Rea r Door. 4 Remove the (3) screws shown in Figure 6-3, callout 1 . 5 Release the (2) latch points with a flat screwdriver while lifting the Top Cover (see callout 2 .
7 Disconnect the Control Panel Ribbon Cable and remove the top cover (see F igure 6-4). Figure 6-4 Control Panel Cable 6-6 Removal and Replacement.
Left Side Cover Removal 1 Remove the Right Side Cover an d the Top Cover. 2 Release the 2 latch points on th e Left Side Cover (fr ont latch first) see Figure 6-5.
Rear Door Removal 1 Remove the PC tray (T ray 2). 2 Open the Rear D oor. Support the do or with one hand. 3 Release the door support fr om the rear of the print er frame a s follows: (see Figure 6-6) a Using needle-nose pliers, squeeze th e tabs on the end of th e retaining strap.
4 LaserJet 4/5: Flex the Rear Door to r elease it from its hing es. Press the middle of t he door while li fting either side (Figure 6-7a). LaserJet 4 Plus: Remove the Rear Door Attaching Clip (Figure 6-7b, callouts 1 through 3 ). Slide the Rear Door as far as possible toward the left, t hen rotate to remov e (Figure 6-7b, callouts 4 and 5 ).
F ont Door Cover Removal (LJ 5 Right F ront Cover Removal) LJ 4/4 Plus 1 Remove the Right Side Cover, the Top Cover, and the PC Tra y. 2 Release the top latch (see Figure 6-8, c allout 1 ). 3 Release the (2) lower latches th rough the access hole in the metal cover (see Figure 6-8, callout 2 and Figure 6-9, ca llout 1 ).
Figure 6-9 Font Door Cover Latches Removal and Replac ement 6-11.
Multi-Purpose (MP) Tray (Tray 1) Door Removal 1 Remove the PC Tray. 2 Open the MP Tray door and extend the MP Tray. 3 Bend the Door Slides out to r elease the tray from th e door slides (see Figure 6-10). Plac e the inner door in the “ up ” position.
Multi-Purpose (MP) Tray (T ray 1) Removal 1 Remove the Right Side Cover, Top Cov er, Left Side Cover, MP Tray Door (Tray 1), and the Fon t Door Cover . 2 Remove the PC Tray (Tray 2). 3 Remove the (2) screws in the Cross-mem ber Bracket as s hown in Figure 6- 11, callout 1 .
4 On the LJ 4+ and LJ 5 you must release the tray tension spring located at the left side of the tray. Use a pair of needlenose pliers to remove the spring from the tray. 5 Rotate the tray down until it slides off its s lotted hinges (about 120 ° )(see Figur e 6-12).
Assemblies Removal P ower Supply Removal 1 Remove the Right Side Cover. 2 Remove the (3) or (2) scr ews from the metal cover at the lower right corner of the printer (see Figu re 6-13a or b, callout 1 .
4 Remove the (2) screws fro m the bottom fram e (see Figure 6-14, callout 1 ). 5 Slide the power supply out the right side of the printer to access the power su pply connector s.
6 Remove the (2) connec tors (6 wire and 3 wire) . (See Figure 6-15, callou t 1 .) Squeeze t he release tab on the 6-wire connector. Pull the 3-wire connecto r straight up. 7 Remove the power supply. Note When replacin g the power supp ly, be sur e to use the screws with the star washers to ensure proper grounding and RFI shielding.
P aper F eed A ssembly Removal 1 Remove the Right Side Cover, the MP opening c over, (see Figure 6-17 ), the Top Cover and t he Left Side Cover, th e Font Door Cover , and the PC tray (T ray 2). T he MP tray nee d not be remove d, but is shown rem oved for clarity.
(continued on nex t page) Figure 6-17 MP Tray Opening Cover Removal and Replac ement 6-19.
5 Remove the (3) screws from the left side of the printer (see Figure 6-18, callout 1 ). 6 Remove the Paper Feed Assem bly by lifting it and sliding it out the fro nt of the p rinter. Note Replace the scr ews in order as shown. (1-2- 3 is also scr ibed on th e pr int er ch assis.
High V oltage P ower Supply (HVPS) Removal 1 Remove the Toner Cart ridge and PC tray. 2 Lay the printer on its left side. (Place a cloth under the printer to prevent marking the cover.) 3 Remove the (2) s crews that hold t he HVPS in place (see Figure 6-19, callout 1 ).
Fuser Assembly R emoval Caution The Fuser Assembly may be hot . Allow plenty of time for the fuser to cool before beginning the fuser removal procedure. 1 Open the r ear door. 2 Remove the (2) screws that hold the Fuser to the printer frame (see Figure 6-20, callou t 1 ).
Control P anel and Overlay Removal 1 Remove the Right Side Cover an d the Top Cover. 2 Turn the Top Cover over and place it on flat surface. 3 Release the (3) latches that cont ain the Contr ol Panel (see Figure 6-21, callout 1 ). 4 Carefully pivot the Control Panel away from the Top Co ver.
5 If you must replace the Control Panel Overlay, release the (2) retainin g tabs from the Contr ol Panel and separat e the overlay from the Control Panel (see F igure 6-22, callout 1). 6 Squeeze the sides of t he Control Pan el Overlay to r elease the (2) tabs (see Figur e 6-22, callou t 1 ).
Removing the SIMMs Door 1 Remove the Right Side Cover. LaserJet 4: 2 Remove the (2) screws that hold the S IMMs cover (s ee Figure 6-23a, callout 1 ). 3 Open the SIMMs cover, lift the door slightly to remove the door from the hinge.
LaserJet 4 Plus/5 : 2 Remove the (1) scre w that holds the SIM Ms cover (see Figure 6-23b, callout 1 ). 3 Swing open the SIMMs co ver. Figure 6-23b Opening the SIMMs Door (LaserJet 4 Plus) 6-26 Remova.
F ormatter Cage Remo val Note You may wisht to re move the metal cov er (on the lower right side) and the power supply for easier access to the Formatter Cage screws. 1 Remove the Right Side Cover an d the Top Cover. 2 LaserJet 4 and 5: Remove the (7) scre ws (6 screws in the LJ 5) shown in Fig ure 6-24a.
Figure 6-24b Formatter Cage Scr ew s (Ri ght Side View - LaserJet 4 Plus) Figure 6-24c Formatter C age Screws (R ear View - LaserJet 4 Plus) 6-28 Removal and Replacement.
F ormatter PCA Removal Caution The Formatter PCA is very sensitive to Electro- static Discharge ( ESD) damage. Obser ve proper ESD procedures when se rvicing the printer. Note Before removing the old For matter PCA, print a 05 SELF TEST to check the current printer page count, if possible.
LaserJet 4 Forma tter PCA: 1 Remove any MIO or SIMM modules fr om the Formatte r Assembly. 2 Remove the (2) black scr ews from the side of the Formatt er Cage (see Figure 6-25a, callout 1 ). 3 Remove the MIO Connector Support Bracket (see Figure 6-25a, callout 2 ).
5 Remove the (4) Interface Connector Support S crews from the rear of the Formatter Cover. The RS-232 connector is held with 5mm hex-head cap screws (see Figure 6 -25b, callou t 1 ). The parallel connector (see Figure 6-25b, callout 2 .) is held in place with Phillips screws.
LaserJet 4 Plus and 5 Formatter PCA 1 Remove any MIO or SIMM modules fr om the Formatte r Assembly. 2 Remove the MIO Connector Support Bracket ( see Figure 6-25a, callout 2 ). 3 Remove the (4) I/O screw s (see Figure 6-26 callout 1 ). 4 Remove the (2) Formatter PCA mounting screws (see Figure 6-26 callout 2 ).
DC Controller Removal Note Note the cable routing before be ginning this disassembly proc edure. Be ca reful not to damag e the cables du ring re-assembly. 1 Remove the Right Side and the Top Cover As semblies. 2 Remove the Formatter Cage Assem bly. 3 Remove the 6-wire connec tor from the Power Supply.
Figure 1-27b DC Controller Connect or s/Retaining Clip s (LaserJet 4 P lus/5) 6-34 Removal and Replacement.
DC Controll er Instal lation Caution When reinstalling the DC Controller PCA it is extremely importan t that all cables be properly routed. If cables are n ot routed pr operly, it is difficult to reinstall the Formatter Cage and cable damage may result.
Figure 1-28 Leading Edge Registration Adjustment Dimensions Figure 1-29 VR202 Settin gs (LaserJ e t 4 sh own) 6-36 Removal and Replacement.
Main Motor Assembly R emoval 1 Remove the Right Side Cover, Top Cover, an d the Formatter Cage Assembly. 2 Unplug the Main Moto r connector from the Main Motor Assembly (see Fi gure 6-30, callout 1 ). 3 Remove the (4) Main Motor screws (see Figure 6-30, callout 2 ).
Gear Assembly Removal 1 Remove the Top Cover, th e Right Side Cover, the Fuser Assembly, and the F ormatter As sembly. 2 Remove the Main Motor Assembly (see Figure 6-30) . 3 Remove the (2) screws t hat hold the Gear Assembly (see Figure 6-31 callout 1 ).
F an Removal Note Note the cable routing before be ginning this disassembly proc edure. Be ca reful not to damag e the cables du ring re-assembly. 1 Remove the Right Side Cover, th e Top Cover, and the Formatter Ca ge Assembl y. 2 Unplug the fan connector (J20 9 on the L aserJet 4, J211 on the LaserJet 4+/5).
3 Remove the RFI shield (LJ 4 only) by releasing the retaining tab and sliding the shield up (see Figure 6-33, callout 1) . 4 Laser Jet 4: Release th e (4) clips fr om the fan ductin g to provide clearance and remove the fan from th e top of the printer (see Figure 6-33, callout 2 ).
Output Assembly Removal 1 Remove the Right Side Cover, th e Top Cover, and the Lef t Side Cover. 2 Release the ground ing strap fro m the left side of the frame. 3 Rotate the top of the Output Assembly toward the front of the printer while relea sing the two retain ing latches (see Figure 6-34, callout 1) until the locating tabs are free.
P aper Exit Sensor (PS3) Removal 1 Remove the Right Cover , Top Cover, and the Out put Assembly. 2 Disconnect the Sensor Cable. 3 Lift the S ensor Retaining L atch and slide the sensor forward (see Fi gure 6-35).
Scanner Assembly Removal 1 Remove the Right Side Cover, Top Cover, Left Side Cover, and the Output Assembly. 2 Remove all cables from the Scanner retaining clips. 3 Remove the (3) connectors ( see Figure 6-36, callout 2 ). Note Be careful not to flex the Laser PCA when removing or installing the cables.
Lower Cassette Assemblies The field-replaceable assemblies of the L ower Cassette are: • Lower Cassette Sensor P CA Assembly • Lower Cassette Pickup Motor Assembly Lower Cassette Sensor PC A Removal 1 Release the Sen sor PCA cover la tches (see Figure 6 -37 callout 1 ).
Lower Cassette Pickup Motor Removal 1 Open the sens or cover and disconnect the center and re ar connectors (see Figur e 6-37, callout 2 ). 2 Release the (2) tabs t hat hold the Upper Fron t Cover (acc ess the tabs through the slots with a small screwdriver - see Figure 6-38 callout 1 ).
5 Lift the motor assembly str aight up out of the the Lower Cassette Base (see Figure 6-39). Note Note the ground connector underne ath the Motor Assembly.
Replacing Fuser Assembly P arts The following procedures describe the removal and replacement of major Fuser Assembly Components (Fusing Roller, T hermistor, Thermoswitch, and Heater Lamp). When performing these procedures, note t he order in which the parts were removed and their orientation.
Fuser Assembly Configurati on Figure 6-40 provides an overview of the orientation of the major Fuser Assembly com ponents. Before beginning the fuser disassembly procedures , become familiar with the location and orientation of the various Fuser Assembl y parts (see Table 6-1).
Removing the Fuser Rol ler Heat Lam p 1 Laser Jet 4 only : Remov e the (2) latche s that hold the right side cover. (Th ere is a gear exp osed on the r ight side of th e fuser, see Figure 6-41, callout 1 .) 2 Release the (7 ) latches on the Laser Jet 4 or the (5) latches on the LaserJe t 4 Plus that hold the wire cover to the Fuser Assembly.
3 LaserJet 4 : With a screwdriver, release the latches by first pressing to clear the lo wer latch, then lif ting to release the upper latch (see F igure 6-42a). LaserJet 4 Plus : With a screwdriv er, releas e the latches by first pressing to clear the lower latch, then lifting to release the upper latch.
(continued on nex t page) Figure 1-42b Fuser Cover End Latches (LaserJe t 4 Plus) Figure 1-42c Fuser Wire Harness C over Removal (LaserJet 4 Plus) 6-51 Removal and Replacement.
5 Remove the (1) Heat Lamp lead (ther moswitch screw)(see Figure 6-43 callout 1 ). 6 Press the thermoswitch tab towards the paper exit flag to release the tab (see Figure 6-43 callout 2 ). Slide the Thermoswitch off the fuser frame (see Figure 6-43, callout 3 ).
Note LaserJet 4 and 5 only: Note the orientation of the bushing on th e left side of the Fusing Roller. 8 Squeeze the l amp connector to rel ease the slip- on connector locking tab from the right side of the heat lamp (see Figure 6-44, callou t 1 ).
Note Before removing the gear cover, note the rou ting of the wires in the gear cover slots. 9 Remove t he (2) screws from the r ight side gear cover (see Figure 6-45, callouts 1 and 2 ). Note the wavy washer on the (1) screw (c allout 1 ) touching the copper conta ct.
Fuser Assembly Thermoswitch Removal Note Six of the seve n latches are accessed from the top of the wire cover. T hese latches are beneath the felt pad. The slot on the front left side of the wire harness cover is the bes t place to begin rem oving the cover.
Thermistor Removal 1 Remove the Wire Harness Cover as shown in F igure 6-47. 2 Remove the (2) screws from the thermoswitch connector (see Figure 6-47, callout 1 ). 3 Release the thermoswitch latch from the paper sensor flag side of the Fuser Assembly (behind the side cover, see Figure 6-47, callout 2 ).
5 Release the (2) springs fr om the Upper Fusing Frame (see Figure 6-48a, callout 1 ). 6 Release the tabs that ho ld the Upper Fusing Frame t o the Fuser Body (see Fi gure 6-48a). Rotate the Upper F rame backwards to release and access the Thermistor (see Figure 6-48b, callout 1 ).
7 Remove the (1) screw that holds the Thermistor (see Figure 6-48b, callout 2 ). Note Ensure the thermistor cable is routed correctly when assembling the fuser (see Figure 6-47).
P aper Control PCA Removal 1 Remove the Right Side, Top, Left Side, and Font Doo r Covers, then Paper Feed Assembly. 2 Disconnect the c ables from the senso rs (see Figure 6-49, callout 1 ). 3 Remove the (2) self-tap ping screws from the Paper Control PCA (see Figure 6-49, callout 2 ).
Sensor PCA Removal 1 Remove the Right, Le ft, Top, and F ont Door covers. You need not remove the MP Tray. 2 Perform the P aper Control PC A removal procedure, as shown in the prec eding section. 3 Disconnect the connectors for SL1, SL 2, and M2 from the left end of the Sensor PCA.
PS1 and PS2 Sensor Assembly Removal The PS1 and PS2 sensors ar e located under the Pape r Feed Assembly. 1 Remove the Paper Feed Assembly and place it on a flat surface, with the MP Tray side down. Note You need not remo ve the MP Tray from the Pap er Feed Assembly.
High V oltage Contact Plate (HVCP) and P aper Guide Removal This procedure involv es removing many subassemblies and difficult disassembly processes. Because this procedure is complex, it is separated into three sec tions: • Accessing the HVCP and Feed Guide Assembly.
After removing the Fuser Assembly, remove the conta ct plate from the rear of the printer, as follows: 1 Remove the (1) screw from the sheet metal Guide Plate Cover.
3 Remove the (6) rollers from the High Voltage Contact Plate (see Figure 6-53 callout 1 ). (continued on next page) Figure 6-53 Paper Guide Rollers 6-64 Removal and Replacement.
4 From the front o f the printer, rem ove the (2) black self-tap ping screws that hold the Inner Cross-member . Remove the cross-member (see Figure 6-54 callout 1 ).
5 From the left side of the printer, remove the (1) or (2) black, self-tapping screw(s) that holds the Left Toner Cartridge Guide Plate (see Figure 6-55, callout 1 ).
Removing the High V oltage Contact Assembly and F eed Guide Assembly Note The following procedures are difficult and the component s are damag ed easily. The toleranc es between the parts are clos e and several attem pts may be necessary before the procedure is complete.
Replacing the High V o ltage Contact Assembly/F eed Guide A ssembly The Toner Cartridge Guide Plate and the High Voltage Contact Assembly/Feed Guide Assem bly must be installed together. Allow plenty of time to perform this procedure because several iterations of the process may be necessary.
Interconnect PCA Remo val The Interconnect PCA is a connector board that connects the Power Supply and the DC Controller with t he the Fuser Assembly. The Fuser Assembly connects directly into the Interconnect PCA. Th e Power Supp ly and the D C Controller h ave wiring harnesses that connect them to the Interconnect PCA.
Note Access the I nterconn ect PCA Housing by laying the printer on the rear of th e printer chassis. 4 Disconnect the Interconnect Cable connector from the DC Controller (J210 on LJ4, J2 13 on LJ4+ /5).
Note The AC Connector has polarity. Note the orientation of the A C Connector before rem oving it. This is required in order to install the connector with the same polarity dur ing assembly (see Figure 6-60) . 7 Release the AC Connector fr om the sheet metal with needle-nose pliers.
6-72 Removal and Replacement.
7 LaserJ et 5 Error Map The LaserJet 5/5M/5N printer has error messa ges that are similar to the LaserJet 4/4M/4+/4M+. Use the following table to look up the L J5 error a nd take the recom mended action.
Message on LJ 5/5M/5N Rec ommendations INCOMPATIBLE TRAY 3 INSTALLED Indicate s that a lower cassette has b een installed that is not compatible with the LJ5. Press GO to clear the error . The tray will not appear in any control p anel or PJL m essages .
Message on LJ 5/5M/5N Recommendations REMOVE PAPER JAM See 13 PAPER JAM REQUESTED LANGUAGE NOT AVAILABLE See W2 INVALID PERS RESETTING ACTIVE I/O See 07 RESET RESETTING ALL I/O See 07 RESET RESTORING .
7-D LaserJet 5 Error Map.
7 T roubleshooting Pre-T roubleshooting Procedures Preliminary Operating Checks Prior to troubleshooting a specific printer problem, you should ensure that: • The printer is being maintained on a regular basis as described in Chapter 4. • The customer is using acceptable media as specified in the User ’ s Manual.
Printer Message Troubleshooting Printer Message Summary T able Table 7-1 is a list o f all status, att endance, erro r, and service messages affectin g the printer s. The table also ident ifies the action required to correct the situatio n identified by the messag e.
Message Symptoms and Recommendations 07 RESET RESETTING [xxx] Retur ns a ll printe r settings to Pr inting Menu setting s, and clears buff ered pag es, temporary sof t fonts , and macros . W ait for the printe r to display the 00 READY message. See the Reset M enu section in Chapte r 3 for more details.
Messag e Sy mp toms and Reco mmendat ions 18 AUX IO INIT This message is displa yed when the MIO ( AUX IO ) card is in the process of initializing. Dur ing initialization the MI O is not active, b u t since the printe r suppor t s I/O switching, the printer rem ains on line and this becomes a statu s message.
Message Symptoms and Recommendations 22 ERROR 22 SERIAL I/O ERROR 22 PARALLEL I/O ERROR 22 HP MIO ERROR F or serial/Bi-T ronics parallel configuration, the computer and printer are not communicating because of improper signal protocols. This is an I/O buff er o verrun e rror .
Note Refer to the “ Product Family Compatibility Matrix ” in Chapter 1, or for the LaserJet 5, Appendix B to veri fy correct memory for t he printer.
Message Symptoms and Recommendations 55 ERROR 55 PRINTER ERROR Indicat es a communications problem between th e DC Controller PCA and the Formatter PCA. Pressing [Continue] * clears the error and resumes printing. P erform th e T est Pr int operation to verify DC Controller functionality .
Messag e Sy mp toms and Reco mmendat ions 64 SERVICE 64 PRINTER ERROR 65 SERVICE 67 SERVICE The printer id entified an in terna l ser vice error . If this error appears, tur n the pr inter OFF , and then back ON. If the problem persists, replace the F ormatter PCA.
Message Symptoms and Recommendations FR REMOVE CART An accessory car tridge was installed while the prin ter was in an err or s tate . T o clear this m essag e, r e mo ve the car tr idge, clear the pending error condition, then install the car tr idge.
Clearable W arnings A clearable warning indicates a transient condition in the printer. The printer continues on line while the message is displayed in place of 00 READY .
Message Display ed Meaning W1 IMAGE ADAPT MEMORY LOW, PAGE SIMPLIFIED The print er received a graphics print file tha t was too complex to print at the reque sted resolutio n. The pr inter automatically processed th e file in the highest resolut ion possible with the memor y installed.
Printer Message T roubleshooting Procedures When the following procedures require removing and replacing an assembly or PCA, refer to the applicable section in Chapter 6 for instructions. Blank Display Checks Act ion Is the power on? 1. 2. Check the ON/OFF sw itch and verify the pow er is plugged in.
MP/PC/LC (Tray 1/2/3) LOA D Message The conditions that result in MP/PC/LC LOAD or ( TRAY 1/2/3 ) messages are: • The absence of any in put tray . • The absence of media in either tray . • The tray size switches may be defective and not recognize the presenc e of the paper tray.
Checks Ac tion Is media present in t he tray(s ). Install media. Are the proper t rays fully inserte d in the printer? Reseat the cassettes. Make sure each cassette is fully seated int o the printer . Ensure that the Univers al P aper tra y selector knob setting matches th e installed paper.
Cassette Size Swi tches (SW603, SW 604, SW605) Func tional Check Before beginning this test, remove the Lower Cassette Base and the Envelope Feede r. Also, PS2 (PC or Tray 2 Paper Ou t sensor) must be engaged for this tes t to be performed reliably. Push PS2 up towards the re ar of the printer with your hand .
Paper Size Sensin g Lower Cassette The operator must set the appropriate paper size for the Lower Cassette using a dial which, in turn, activates switches on the cassette base. This setting is sent to the DC Controller on the serial data bus (SLI). The printer posts a 41.
PC Empty Sensor (PS2) Functional Check 1 Power on the printer with the PC tray (Tray 2) empty . 2 After the 05 SELF TEST an d the 02 WARMING UP cycles, the PC LOAD LETTER (or A4 ) or TRAY 2 EMPTY message appears. 3 Add paper to the PC tray and re-install the tray.
12 Printer Op en Messag e The 12 PRINTER OPEN (or CLOSE PRINTER COVER ) display tells the operator to close the printer ’ s top co ver. The DC Controller detects the Printer Open condition through the position of SW601, which is located on the Paper Feed Assembly PCA .
SW601 Functi onal Chec k 1 Open the Top Co ver Assembly. 2 The message 12 PRINTER OPEN (or CLOSE PRINTER COVER ) should ap pear. 3 Close the top cover.
13 P APER JAM Message Paper jams occur when paper fails to arrive at or clear the paper path sensors in the allotted time. Paper movement is monitored primarily by two paper sensors. These are described below and illustrated in Figure 7-3). 1 PS1, the Input/Registration Sensor, located in the Paper Feed Assembly.
Jam Location Checks and Action Required Input Area Jams (Sensed by PS1.) 1. Check that the T ransfer Roller is fully s eated and shows no sign of wear . 2. Check that the T oner Car tr idge is fully seated . 3. Check that the cassettes are not overfull and the m edia is loaded correctly .
PS1 (Input/Registration Sensor) Che ck 1 Power ON t he printer with t he top cover open . Wait for the 12 PRINTER OPEN (or CLOSE PRINTER COVER ) mess age. 2 Engage PS1 by tap ing it down . a For the Las erJet 5, i nstall the toner cartridge . 3 Close the top cover .
PS3 (Ex it Senso r) Ch eck 1 Open the r ear door ( cover) of th e printer. 2 The display should read 13 PAPER JAM (or REMOVE PAPER JAM ) immediately after the door is opened. 3 Close the rear cover. The display should change from 02 WARMING UP to 00 READY .
Lower Cassette Functiona l Check When troubleshooting a Lower Cassette failure, always prove the failure by removing the Lower Cassette from the printer. Next, test the printer ’ s ability to move and print media satisfactorily without the Lower Cassette installed.
14 NO EP CART Message The printer detects the pr esence of th e Toner Cart ridge and the level of toner present in the cartridge through the condition of the ANTIN signal. The ANTIN signal becomes part of the serial data stream used to communicate with the DC Controller (see Figure 7-5 for cartridg e components).
1 2 4 5 6 3 Figure 7-5 Toner Cartridge Components Callout Assembly 1 T o ner Low V olt age Cont act 2 Dev eloper Roller High V oltag e Contact 3 De v eloper Roller 4 Photoconducti ve Drum 5 Cha rge Ro.
41.X ER ROR Message A 41.X ERROR (misprint) indicates that a tempor ary malfunction has occurred with the pri nt engine (NOT a Formatter error). Occasional occurre nces of this mes sage can be ex pected. However, persistent 41 ERROR messages indicate a problem requiring attention.
Error Message Rec ommended Action 41.1 ERROR Noisy V er tical Sync (VS) Reseat a ll connectors on th e DC Controller , the Laser Drive PCA, the Scanner Connector and the Bea m Detect Connector . 41.2 ERROR Beam Detect (BD) weak or unstable. Reseat all connecto rs on the DC Contro ller .
50 SERVICE Error - Fuser Malfunction Warning The Fuser Assembly is HOT. Allow the assembly time to cool before servicing. The purpose of the fusing system is to maintain a constant temperature on the fus er roller. A hig h intensity fusing lamp, located inside the fuser roller, provides the high temperature required for the fusing process.
Note The 50 SERVICE error message can be c leared immediately by shorting the C202 leads on the HP LaserJet 4/4M (or the C205 leads on th e HP LaserJet 4 Plus/4M Plus/5/5M/5N) on the DC Controller. Remov e the Formatter P CA to acces s the DC Controller as sh own in Chapter 6.
51 ERROR Message The 51 ERROR , and the 41.2 ERROR are caused by Beam Detect failures. If the beam detect signal is lost for more than 2 seconds the error is posted as a 51 ERROR . The 41.2 ERROR can be cleared by pressing [Continue] (or Go ). The 51 ERROR may be cleared by power cyclin g the printer.
52 ERROR Scanner Malf unction The scanner motor is a flat, brushless, DC motor. Motor operation is completely controlled by the DC Controller. The scanner motor is en abled when the printer is p owered-up (during the printer ’ s power-on self test) , or whenev er the PRINT command is receiv ed by the Format ter PCA.
57 (or 57.1) SERVICE Message (Main Motor Fa i l u r e ) The 57 SERVICE indicates that the DC Controller PCA detected a general motor failure. The Main Motor drives all moving components in the printing proc ess. The Main Motor is a 4-ph ase, DC servo motor controlled by t he DC Controller PCA.
58 (or 57.2) SERVICE (F an F ailure) The 58 SERVICE indicates that the DC Controller detected a failure in the Exhaust Fan (FM1) in the printer or the optional duplexer. When troubleshooting this problem, perform the following steps in the order given.
Image Defect Summary The quality of the printer ’ s o utput is subjec t to the judg ment of the user. This s ection of the ma nual helps yo u define pri nt quality defects, and understand what factors affect print quality. The print samples shown in the following figur es illustrate some print quality defects.
Figure 7-7 Image Defect Summary 7-36 Troubleshooting.
Figure 7-8 Im age Defect Summary Troubleshooting 7-37.
Possib l e Caus e Action The HVPS connections are dir ty . Clean the HVPS term inals (see Figure 7-18 for la yout). The HVPS is installed improperl y . If the HVPS has been removed and replaced, it may not be seated proper ly . Remove the HVPS, and chec k the connectors for damage.
Possibl e Cau se Action P aper. The surface of the paper may be too smooth for the pickup roller to mo v e the paper through the paper path. Change pap er .
Possib l e Caus e Action No toner availabl e for print. Shake/replace the EP T on er Car tridge. Laser shutter may be b loc king the beam Ensure that t he mechanism that lifts the shutter is functiona l, for e xample, the shutter doesn ’ t stick in its trav el, an d is lifted ev enly .
For further information on interval dimensions, refer to the Repetitive Defect Ruler, Figure 7-19. Possibl e Cau se Action T oner Car tridge. The circum ference of the photoconductive drum is 3.75 inches (94mm). The circumference of the dev elope r roller is 2 inches (51mm).
Possib l e Caus e Action Fuser lev ers no t in place. (All LJ4, some LJ4+, N/A on LJ5) The Fuser Assembly has sh ipping lev ers that must be lowered dur ing the setup process. See Chapter 3 for ins truction on how to lower the fusing le vers . Media. The m edia may not be acceptable for laser printing.
Possibl e Cau se Action Laser/Scanning Assembly or DC Controller PCA. Replace the La ser/Scanning Assem bly follo wed by the DC Controller PCA, if necessar y (see Figure 7-12 for locations). Table 7-22 Bl ack Pages with Horizon tal White Str ips Possibl e Cau se Action Input/Registration Sensor (PS1).
PS5 Check (MP Tray Pa per End Sensor) Functio nal Test 1 Make a test sheet by cutting a notch in the trailing edge of a sheet of paper as shown in Figure 7-9. 2 Perform the set u p procedur es listed for the PS4 che ck (MP Tray Empty S ensor) on p age 7-17, and put the tes t sheet into the MP tray when the display reads XX LOAD LEGAL .
Figure 7-9 PS 5 Test Sheet Troubleshooting 7-45.
Possib l e Caus e Action Dir ty Pr imar y Charge ro ller . Change the T o ner Cartr idge. Bad T oner Car tr idge. Replace the T oner Car tr idge. Incompatible media. During media manufacture, inks, or other finishing processes ma y interfere wi th the electro-photographic or fusing process.
Possibl e Cau se Action Defectiv e T oner Car tr idge. The T oner Car tr idge may be internally dam aged. Replace the T oner Car tridge. Bad paper lot. The paper moisture content, conductivity , or surfac e finish may be incompatible with the electro-photographic process.
Possib l e Caus e Action Defectiv e laser shutter. Chec k the laser shutter for free ope ration when inser t ing the EP T oner Car tr idge. EP Car tr idge Suppor t damaged , improperly po sitioned, or missing.
Image F ormation T roubleshooting Half Self-T est Functional Check The electro-photographic process can be subdivided into the following stages: • Cleaning (Physical and Electrostatic). • Conditioning (Primary Charge Roller). • Writing (Laser Modu lation).
Drum Rotation Functio nal Check The photoconductive drum, located in the Toner Cartridge, must rotate for the print process to work. The photoconductive drum receives its drive from the Main Motor gear tr ain. To veri fy whether the drum is rotating: 1 Open the printer ’ s Top Cover Assembly.
High Voltage Powe r Supply Assembly The High Voltage Pow er Supply Assembly pr ovides the nece ssary voltages for the printer ’ s electro-ph otographic processes.
Interface T roubleshooting This section provides an overview of the printer interface requirements. Refer to Chapter 3 for detailed information about the printer interfaces and configuration. Communications Check Note Communication problems are normally the customer ’ s responsibility.
A UTOEXEC.BA T Standard Configurations Parallel DOS Commands If the previous check did not produce the desired result, ensure that the AUTOEXEC.BAT file contains th e following statemen ts for parallel interface communications: MODE LPT1:,,P For MS-DOS version 4.
Communications Checks Checks Ac tion Is your co mputer configured to t he parameters de scribed in th e configuration instr uctions? These parameters are required to communicate with the pr inter . V erify your computer ’ s communications por t configuration matches these param eters.
If the host sy stem and pr inter still are not communicating, and steps 1 through 9 have been completed, replace the Formatter PCA and the MIO c ard, and reconfigure the printer . If the problem persists, a protocol analyzer may be needed to find the source of the problem.
MIO T roubleshooting The Self Test Printout a nd explanation shown on the following pages contain valuable information regarding the current status of the MIO. Before attempting to troubleshoot a network problem or notifying your network co nsultant of a problem , always o btain a Self Test Printout.
Explanation of Self Test Printout 1 Multiple Environment Information. General information about your JetDirect MIO. 2 JetDirect Card Status. I/O CARD READY indicates the interface is correctly configured and capable of communicating. I/O CARD NOT READY indicates th ere is a problem with the interface, configuration, or server.
Figure 7-10 MIO Staus Inform ation on the Sel f Test Printout 7-58 Troubleshooting.
T roubleshooting Aids Component Locations The following illustrations help you quickly find the parts discussed i n this chapter. 1 2 3 4 5 5B 5A 5C Figure 7-11 Major Assembly and Connector Locations .
1 2 3 4 5 6 Fi gu r e 7 - 12 Major Assembly and Conn ector Locations (2 of 3) Number Pa rt 1 Laser/S canner Ass embly 2 DC Contr o ller PCA 3 Interconnect PCA Assem b ly 4 P aper Control P CA 5 High V.
1 2 3 4 Figure 7-13 Major Assembly and Connector Locations (3 of 3) Number Pa rt 1 P ow er Supply Asse mbl y 2 Env elope F eeder Main Moto r (M4) 3 Lowe r Cassette Driv e PCA 4 Lower Ca ssette Mai n M.
Figure 7-14 Switch Locations Number Pa rt SW101 AC Input ON/O FF Switch (P ower Supply Assemb ly) SW 601 T op Cover Open Sensing Sw itch SW602 TEST PRINT Switch SW603 PC (T ray 2) T ray Size Switches .
Figure 7-15 Optional 500 Shee t Lower Cassette Number Part SW851 Optional 500 Sheet Paper F eeder P ape r T ray (T ra y 3) Size Switches SW852 SW853 Table 7-35 Troubleshooting 7-63.
5 V R202 J206 J203 J204 J205 61 1 8 1 1 7 1 2 1 3 1 J202 J201 13 1 3 J21 2 CP 202 16 T B201 CP 201 J211 4 1 10 1 J21 0 3 1 J209 4 1 3 1 25 26 J21 3 J208 J207 Figure 7-16 DC C ontroller PC A Layout—L.
5 J204 15 1 1 9 2 1 J206 J205 V R201 1 13 31 17 J201 J21 2 31 J21 5 T B201 6 1 J21 4 10 1 J21 3 3 1 J211 3 J21 0 1 8 1 1 7 J209 J208 J207 31 32 Figure 7-17 DC Controller PCA Layout — LaserJet 4 Plus.
T B403 TB404 T B405 T B406 V R401 J402 3 1 J401 5 1 A B A B T B402 T B401 Figure 7-18 High Voltage PCA Layout Number Pa rt J401 High V oltage PS Con nection T o DC Co ntroller PCA via Intercon ne ct P.
Repetitive Defect T emplate Repetitive print defects usually are associated with a specific roller within the printer, or the Toner Car tridge. The following templates are provided to help quickly isolate the cause of repetitive print defects.
Figure 7-20 Main Wiring Diagram (LJ 4+/5 only) 7-68 Troubleshooting.
V oltage T est P oints The operating voltages of the printer can be verified by: 1 Listening for the exhaust fan. A rotating fan indicates that the +5 VDC and +24A VDC voltages are present. (The fan run s on +24A VDC. The +5 VDC enables the +24A VDC.) 2 Listen for the Main Motor.
7-70 Troubleshooting.
8 P arts and Diagrams How T o Use the P arts Lists The figures in this chapter illustrate the major subassem blies and component parts of the HP LaserJet 4/4M, LaserJet 4 Plus/ 4M Plus, and LaserJet 5/5M/5N printers.
P arts Lists and Illustrations Figure 8-1a Field-Replace able Assembli es (1 of 2) 8-2 Parts and Diagrams.
Figure 8-1b Field- R eplaceable Asse mblies ( 2 of 2) Parts and Diagrams 8-3.
Part # Ref Exchng # Description Fig. # RG5-0454-000CN RG5-0879-130CN 1 C2001-690 03 C2037-69001 Fusing Ass’y (100/1 10V) LaserJet 4 LaserJet 4 Plus/5 8-10 RG5-0455-000CN RG5-0880-130CN 1 C2001-690 0.
Part # Ref Exchng # Des cription Fig. # C2085B C2085E C3925A 13 PC T ray (T ray 2) (ltr) LaserJet 4 LaserJet 4 Plus LaserJet 5 8-14 C2085C C2085F C3926A 13 PC T ray (T ray 2) (A4) LaserJet 4 LaserJet .
Figure 8-2 C overs and Panels 8-6 Parts and Diagrams.
Ref Part # Notes Description 1 RB1-2143-000CN RB1-3558-000CN RB1-7885-000CN LJ4 LJ4+ LJ5 MP T ray Extender 2 RB1-2346-000CN RB1-3470-000CN RF5-1644-000CN LJ4 LJ4+ LJ5 Right Cov er 3 RB1-2347-000CN RB1.
Figure 8-3a Top Cover Assembly for LaserJet 4/4+ 8-8 Parts and Diagrams.
Ref Part # Notes Description 1 RB1-233 0-000CN S Spr ing, Leaf 3 RG5-0458-000CN RG5-0872-000CN LJ4 LJ4+ Upper Cov e r Assembly 3A RB1-2322-000CN RB1-3474-000CN LJ4 LJ4+ T op Cover Door 3B RB1-2323-0 00CN H inge , Brack et 3C RB1-232 4-000CN 2 ea.
Ref Part # Notes Description 4A C2037-40001 C2037-40002 C2037-40003 C2037-40004 C2037-40005 C2037-40006 C2037-40007 C2037-40008 C2037-40009 C2037-40010 C2037-40011 C2037-40012 C2037-40013 C2037-40014 .
Figure 8-3b Top Cover Assembly for LaserJet 5 Parts and Diagram s 8 -11.
Ref Part # Notes Description 1 RB1-7895-000CN T ool, Hook 2 RB1-789 3-000CN S Spr ing, Leaf 3 R G5-2186-0 00CN Upper Cover Assembly 3A RB1-7894-0 00CN Hinge Stop 3B RB1-7883-0 00CN T op Cover Door 3C .
Figure 8-4a Internal Components (1 of 4) Ref Part # Notes Description 1 RB1-2080-0 00CN Sh utter , laser 2 RB1-2100-000CN RB1-5730-000CN LJ4/4+ LJ5 Guide, Car tridge 3 RB1-2101-020CN Guide, Car tridge.
7 RB1-2111-030CN Shutter , arm 8 RB1-2114-000CN Qty 5 Foot 9 RS5-2218-0 00CN Spr ing, Comp ression 10 RB1-2122 -000CN Shutter Spring , T orsion 11 RB1-5732 -000CN Spring, T orsion 12 RB1-2141-000CN RB.
Figure 8-4b Int ernal Components (2 of 4) Parts and Diagram s 8 -15.
Ref Part # Notes Des cription 1 RB1-2112-000CN RB1-3544-000CN LJ4 LJ4+/ 5 Exhaust Duct 2 RB1-2113-000CN RF5-0748-000CN LJ4 LJ4+/ 5 Exhaust Duct Co ve r 3 RB1-2350-000CN RB1-3547-000CN LJ4 LJ4+/ 5 Exha.
Figure 8-4c Internal Components (3 of 4) Parts and Diagram s 8 -17.
Ref Part # Notes Description 1 RS5-8219-000CN S Label 2 RB1-2357-000-CN RB1-7897-000CN LJ4/4+ LJ5 Cov er , Co nnector 4 XA9-0584-000CN XA9-0670-000CN LJ4 LJ4+/5 Screw , w/ spr ing washer 5 XA9-05 74-0.
Ref Part # Notes Description 22 C2002-67901 C2038-60004 C3919-67901 LJ4 LJ4+ LJ5 F ormatter PCA 22 C2002-69001 C2038-69004 C3919-69001 LJ4 LJ4+ LJ5 F orm atter PCA (Exchange) 23 RB1-3494-000CN RB1-789.
Figure 8-4d Internal Components (4 of 4) 8-20 Pa rts and Diagram s.
Ref Part # Notes Description 1 RB1-2236-0 00CN Guide, F eeder 2 RB1-2253-000CN Roller , Guides (6) 3 XA9-06 23-000CN He x Head Screw 4 RG5-0468-0 00CN RG5-2192-0 00CN LJ4/4+ LJ5 T ransf er Bloc k Ass ’y 5 RB1 - 22 5 1-00 0 C N Blo ck, Conne ct ing 6 RG5-0521-0 00CN RG5-0979-0 00CN LJ4 LJ4+/5 Cab l e, D .
Figure 8-5 Main Switc h Assembly 8-22 Pa rts and Diagram s.
Ref Part # Notes Description 1 RB1-2118-000CN RB1-7906-000CN LJ4/4+ LJ5 S Base, Switch Mounting 2 RB1-2119-000CN RB1-7907-000CN LJ4/4+ LJ5 S Switch 3 RB1-2345-000CN S Cov e r (LJ4/4+ only) 4 RG5-0524-.
Figure 8-6a Paper Feed Assembly (1 of 2) 8-24 Pa rts and Diagram s.
Figure 8-6b Paper Feed A ssembly (2 of 2) Parts and Diagram s 8 -25.
Ref Part # Notes Descr i p t ion RG5-0451-000CN RG5-0877-000CN RG5-2195-000CN LJ4 LJ4+ LJ5 P aper Feed Assembly C2001-6900 5 C2037-6900 3 C3916-6900 5 LJ4 LJ4+ LJ5 P aper Feed Ass ’ y (exc hng) 1 RB.
Figure 8-7 MP Tray (Tray 1) Assembly Part # Notes Description RG5-0472-000CN RG5-0888-000CN RG5-2199-000CN LJ4 LJ4+ LJ5 Multi-Pur pose T ray Assemb ly Tr a y 1 A s s e m b l y Table 8-7 MP Tray (Tray .
Figure 8-8 Paper Output Assembly Ref Part # Notes Description RG5-0456-000CN RG5-0886-000CN RG5-2189-000CN LJ4 LJ4+ LJ5 P ap er Output Assembly 2 RB1-2299-030CN 4 ea. Rollers, Deliv ery 3 RB1-2302-000CN 4 ea. Spring, Rolle r 7 RF5-04 25-040CN 4 ea . Holder , Roller 13 RS5-2185-000CN RS5-2267-000CN LJ4 LJ4+/5 4 ea.
Figure 8-9 Delivery S ensor Assembly Ref Part # Notes Description RG5-0475 -060 C N Assembly , De li ver y Senso r 5 WG8-02 91-000CN Pho tosensor , (PS3) 6 RG5-0522-0 00CN RG5-0980-0 00CN LJ4 LJ4+/5 C.
Figure 8-10 Fuser Assembly 8-30 Pa rts and Diagram s.
Ref Part # Notes Description RG5-0454-000CN RG5-0879-130CN LJ4 LJ4+/5 Fuser Assembly 110/115V C2001-69003 C2037-69001 LJ4 LJ4+/5 Fuser Assembly (Exchange) 110/115V RG5-0455-000CN RG5-0880-130CN LJ4 LJ.
Ref Part # Notes Description 20 RS5-0232-000CN RS5-0393-000CN LJ4 LJ4+/5 S Gear , 23T 21 RS5-1063-000CN RS5-1097-020CN LJ4 LJ4+/5 Bushing, Roller 22 RS5-1064-000CN RS5-1098-000CN LJ4 LJ4+/5 S Bushing,.
Accessory P arts Figure 8-11 Lower Cassette Base Assembly Parts and Diagram s 8 -33.
Ref Part # Notes Description C2083A L J4 LC Base Assembly w/non-Legal Cassette C2083B C2083D C3921A LJ4 LJ/4+ LJ5 LC Base Assembly with Legal Universal Cassette Tr a y 3 4 RB1-2606-000CN RB1-7977-000C.
Figure 8-12 Lower Cassette Drive A ssembly Ref Part # Notes Description 1 RG5-0481-0 00CN RG5-1099-0 00CN RG5-2209-0 00CN LJ4 LJ4+ LJ5 Drive Assembly , Lower Cassette Drive Assembly , T ra y 3 1a RB1-.
Figure 8-13 Lower Cassette Assembly Ref Part # Notes Description 1 C2084A C2084C LJ4 LJ44+ Universal 500 sheet Lower Cassette T ray (non-Legal) 1 C2084B C2084D C3923A LJ4 LJ4/4+ LJ5 Universal 500 shee.
Figure 8-14 Universal Cas set te Parts and Diagram s 8 -37.
SIMM Memory Ref Part # Notes Description C2085A C2085D C3924A LJ4 LJ4+ LJ5 250 sheet Universal T ray (Legal, Letter , Exec , A4) C2085B C2085E C3925A LJ4 LJ4+ LJ5 250 sheet PC T ra y (letter) C2085C C.
Miscellane ous Parts a nd Ac cesso r i es Part # Notes Description 92298A T one r Car tr idge J2341A J2552A (J2552 -6 9001) LJ4 LJ4+/ 5 AppleT alk MIO Interface J2550A (J2550-69001) LJ5 10-BaseT MIO I.
P arts List Description Part # Fig. # Printer 10-BaseT MIO Interface J2550A (J2550-6 9001) 5 16 Mbytes C3146A 4+/5 250 Sheet PC T ray (A4) C2085C 8-14 4 250 Sheet PC T ray (A4) C2085F 8-14 4+ 250 Shee.
Description Part # Fig. # Printer Base, Switch Mounting RB1-2118-0 00CN 8-5 4/4+ Base, Switch Mounting RB1-7906-0 00CN 8-5 5 Belt, Timing XF9-0410-000CN 8-8 4/ 4+/5 Block, Connecting RB1-2251-000CN 8-.
Description Part # Fig. # Printer Cable, P aper Feed RG1 -0542-020CN 8-11 4/ 4+/5 Clamp, Plate Release RB1-2284-000CN 8-10 4/ 4+ Clic k, Spring RF5-0374-000CN 8-11 4/4+/5 Clic k, T ray 1 Door (Qty 2) .
Description Part # Fig. # Printer Cov er , Uppe r RF5-0732-000CN 8-3 a 4+ Cov er , Uppe r RF5-1643-000CN 8-3 b 5 Cov er , Wire RF5-0535-000CN 8-10 4 Cov er , Wire RF5-0738-000CN 8-10 4+/5 DC Controlle.
Description Part # Fig. # Printer Env elope Feeded (exc hange) C2082-69 001 4/4+ Env elope Feeded (e xc hange) C3927-69 001 5 Env elope Feeder (new) C2082B 4/4+ Env elope Feeder (new) C3827A 5 Exhaust.
Description Part # Fig. # Printer Fuser Assembly (100/115V) C2 037-69001 4+/5 Fuser Assembly (220/240V) C2 001-69004 4 Fuser Assembly (220/240V) C2 037-69002 4+/5 Fuser Assembly (220/240V) RG5-0 455-0.
Description Part # Fig. # Printer Guide, Lower Separation RB1-2272-00 0CN 8-10 4 Guide, Lower Separation RB1-3526-00 0CN 8-10 4+/5 Guide, P aper Entrance RB1-2265-000CN 8 -1 0 4 Guide, P aper Entrance.
Description Part # Fig. # Printer Inner Cover Assemb ly RB1-2609-000CN 8-11 4+ Inner Cover Assemb ly RB1-7978-000CN 5 Inner Cover Assemb ly RG5-0487-000CN 8-11 4 Label RS5 -8219-0 00CN 8-4c 4/4+/5 Lab.
Description Part # Fig. # Printer Lower Cassette T ray , Univ . 500 sheet C2 084A 8-13 4 Lower Cassette T ray , Univ . 500 sheet C2 084C 8-13 4+/5 Lower Cassette T ray , Univ . 500 sheet Legal C2084 B 8-13 4 Lower Cassette T ray , Univ . 500 sheet Legal C2084 D 8 -13 4+/5 Lower Cassette T ray , Univ .
Description Part # Fig. # Printer Overlay (Cz echoslov akian) C3916 -40023 8-3b 5 Overlay (Danish) C2001-40 008 8-3a 4 Overlay (Danish) C3916-40 011 8-3b 5 Overlay (Dutch) C2001 -40010 8-3 a 4 Overlay.
Description Part # Fig. # Printer Ov erlay (Sp anish) C3916-400 09 8-3b 5 Overla y (Sw edish) C2001-40007 8-3a 4 Overla y (Sw edish) C3916-40016 8-3b 5 Overla y (Thai) C3916-40025 8-3b 5 Overla y (T r.
Description Part # Fig. # Printer P ape r Feed Assembly RG5-0451-000CN, 4 P ape r Feed Assembly RG5-0451-000CN 8-6 4 P ape r Feed Assembly RG5-0877-000CN 8-6 4+ P ape r Feed Assembly RG5-0877-000CN 4+.
Description Part # Fig. # Printer Plate, Grounding RB1-2647-000CN 8-11 4/4+/5 Plate, Length Adjustment RB 1-2370-02 0CN 8-14 4/4+/5 Plate, PCA Holding RB1-2 365 -000CN 8-4c 4 Plate, PCA Holding RB1-3 .
Description Part # Fig. # Printer P ower Supply (100/110 V) RG5-0531-00 0CN 8-1a 4+/5 P ower Supply (100/110 V) RG5-05 31-000CN 8-1a 4 P ower Supply (100/110 V) RG5-2499-00 0CN 8-1a 4+ P ower Supply (.
Description Part # Fig. # Printer Roller , Lower RB1-3517-030CN 8-10 4+/5 Roller , Lower Delivery RF5-0438-000CN 8-8 4 Roller , Lower Delivery RF5-1077-030CN 8-8 4+/5 Rolle r , MP T ray Pi c kup R B 1.
Description Part # Fig. # Printer Screw , w/Sprin g W asher XA9-05 84-000CN 8-4c 4 Screw , w/Spring W asher XA9-06 70-000CN 8 -4c 4+/5 Screw , w/W asher, 2 ea XA9-02 67-000CN 8 -4b 4+/5 Screw , w/W asher, 4 ea.
Description Part # Fig. # Printer Suppor t, Car tridg e RB1 -2 105 -03 0CN 8-4a 4/ 4+/ 5 Switc h RB1- 2119-0 00CN 8-5 4 /4+ Switc h RB1-79 07-000CN 8-5 5 Thermistor RH7-7045-000CN 8-10 4 Thermistor RH.
A Duplexer This Appendix contains a functional overview of the Optional Duplexer, as well as step-by- step Installation and Removal & Replacement instru ctions. The Optional D uplexer, when used with the LaserJet 4 P lus/5 printer, allows printing on both sides of the paper.
Functional Overview The Duplexer consists of two major assemblies; the Switchback Assembly that is attached t o the back of the printer and the Holding Tray located direc tly under the printe r (see Figure A-1.
Duplex Printing Note The bol d text and numbers in th e following description refer t o parts s hown in F igure A-2. When the printer is operating in duplex mode, the print images are printed in reverse order. Page two prints on the first pass of the paper through the pr inter and page one prints on the second pass through.
As the paper moves f rom the Switchbac k Assembly, it is picked up by the r ollers that a re operated b y the Holding Tr ay Inpu t Stepper Motor. The Input Stepper Motor moves the paper into the Holding Tra y.
Electrical Overview The block diag ram in Fig ure A-3 shows th e Duplexer elec trical component s. AC PO W E R SUP P L Y DUP L EXER CONT ROL PC A AC PO W E R TO PR I N TE R INP UT AC PO W E R TO PR I .
Installing the Optional Duplexer The optional Duplexer can be installed by the customer. There are no fastener s securing the u nits together . The print er simply rests in place on top of the Duplexer, which, in turn, rests on top of the optional 500-sheet Lower Cassette, if used.
7 6 5 2 4 3 1 2 3 1 2 1 1 2 Figure A-4 Duple xer Installati on/Removal Duplexer A -7.
Removal and Replacement This section describes the complete disassembly of the Duplexer. Tasks that must be performed before beginning the procedure are listed first. Remove the assemblies in the order listed to prevent damage. The assembly proce dure is the r everse of the removal pr ocedure, except where specific instructions are provided.
Removing the Covers Removing the Switchback Covers 1 Remove the (2) screws shown in Figure A-5, callout 1. 2 Lift the cover off the Switch back Assembly.
Removi ng the Si de Cov er on Powe r Side 1 Open the front door. 2 Remove the (1) screw sh own in Figure A-6, callou t 1. 3 Release the (3) latch points with a flat screwdriver and rotate the cover d ownward ( see Figure A-6, c allout 2).
Remov ing the Side Co ver on G ear Si de 1 Remove the (2) screws on top and the ( 1) screw on the front (see Figure A- 7, callout 1). 2 Turn the Duplexer on its side to access the latch location on the underside. 3 Release the (1 ) latch point w ith a flat scr ewdriver a nd lift th e cover off (see Fig ure A-8).
Figure A-8 Latch Locati on on Underside of Duplexer A -12 Duplex er.
Remov ing the Back Co ver 1 Place t he duplexer o n a table or b ench so that the back overhangs the edge b y a few inches. 2 Release the (2) locatin g pins as shown in Figure A-9. 3 Rotate the cover downward until it is free. Removing the Front Cover With the side covers removed, the front cover is only attached by the holding tray arm.
Removing Internal Duplexer Components Removing the Fan/Motor/Solenoid/Sensor Access to the electronic components of the switchback assem bly is easy once th e covers are removed. Note th e location of the switchback stepper motor (Figure A-10, callout 1), the switchback fan assembly (callout 2 ) and the switc hback solenoid ( callout 3).
Removing the Switchback Paper Guide 1 Remove the (1) E-clip from the shaft on the stepper motor side shown in Figur e A-11, callou t 1. 2 Pull the shaft toward the left and out of its track. 3 Rotate the shaft 90 degrees to remove it from the metal paper guide solenoid a rm.
Removing the Paper Gui de Assembly 1 Remove the (4) screws show n in Figure A-11, c allout 2. 2 Lift the switchback assembly and clear the wires. 3 Remove the assembly. Note: When re-assem bling, verify proper wire routing as shown in Figure A-12, callout 1.
Removing the Paper Roller 1 Remove the (1) screw below the Switc hback Solenoid Arm on the gear side as shown in Figure A-13, callout 1 . 2 Remove the sensor, squ eezing the ta bs on the u nderside of th e sensor (see Figur e A-13, callout 2 ).
3 Remove the (1) screw shown previously in Figure A-1 2, callout 2 . Remove the upper switchback paper guide by releasing its latch with a flat screwdriver and pushing to the side. 4 Remove the (4) screws on top of the sheet m etal part of the upper paper guide shown in Figu re A-14, callout 1 .
5 Remove the (1) E-clip from the gears on the shaft on the Power PCA side shown in Figure A-15, callout 1 . 6 Rotate the bushings and lift the roller out.
Remov ing the Co ntrol PC A 1 Remove the (2) screws show n in Figure A-16, c allout 1 . 2 Remove the cover plate. (continued on next page) Figure A-16 Cover Plate A -20 Duplex er.
3 Unplug all connect ors from the Control PCA. Note The Control PCA connectors are keyed. 4 Remove the (4) screws shown in Figure A-1 7. 5 Disconnect the connector from the power supply.
Removing the Power PC A 1 Remove the (6) cover screws, (4) on the top and (2) on the side. Remove the cover. 2 Remove the (4) screws fr om the Power PCA (see Figur e A-18, callout 1 ). 3 Unplug the connector (s ee Figure A-18, callout 2 ). 4 Lift the Power PCA out o f the duplexer.
Removing the Holding Tra y Center Paper Gui de 1 Remove the Control PCA as described earlier. 2 Remove the (2) screws from the pla te located on the pow er PCA side of the du plexer (se e Figure A-19, ca llout 1 ).
Removing the H olding Tray Be lt 1 Remove all the screws securing the plate (see F igure A-20, callout 1). 2 Remove (1) E-clip shown in Figure A-20, callout 2 . 3 Remove the bushing underneath the E-clip. 4 Release (2) latch points shown in Figure A-20, callout 3 .
6 Remove the (1) one-way gear shown in Figure A-21, callou t 1 . Note The one-way gear must be reassembled correctly. With the gear on the shaf t, turn the gea r clockwise. The sh aft should move the belt. Turning the gear counter clockwise should res ult in no movement of the shaft and belt.
Removing the Holding Tray Paper Sensor 1 Release the outpu t holding tray. 2 Remove t he (2) screws from the s tepper m otor mo unt and remove mount. (This provides access to the paper sensor latches.) 3 Squeeze the ( 2) latch poin ts of the paper sensor to release (see Figure A -22).
Removing the Switchback Assembly 1 Pull out the pin located on the Power PCA side (see Figur e A-23, callout 1 ). 2 Release the (1) E-clip on the upper pin near the retaining arm (see Figure A-23, callou t 2 ). 3 Pull the reta ining arm off the pin. 4 Rotate the switchback assembly and remove.
P arts and Diagrams for the Duplexer The figures in this section illustrate the major subassemblies and component p arts of the H P LaserJet 4+/5 Duplexer.
Figure A-24 Duplex External Covers Duplexer A -29.
Ref P art # Notes Description 1 RA2-2061-000CN RA2-2231-000CN LJ4+ LJ5 F ront Cov er 2 RA2-2096-000CN RA2-2232-000CN LJ4+ LJ5 Left Cov er 3 RA2-2097-000CN RA2-2233-000CN LJ4+ LJ5 Right Cov er 4 RA2-20.
Figure A-25a Duplex Feeder Assembly (1 of 2) Duplexer A -31.
Figure A-25b Duplex Feeder A ss embly (2 of 2) A -32 Duplex er.
Ref P art # Notes Description 1 RA2-2069-000CN LJ4+/ 5 PCA Shield Plate 2 RA2-2070-000CN LJ4+/5 Static Elim in ato r sml 3 RA2-2072-000CN LJ4 +/5 Timing Belt 4 RA2-2076-000CN LJ4+/5 Sensor Ar m 5 RA2-.
Ref Part # N otes Descripti on 25 RS1-2406-000CN LJ4+/5 T orsion S pring (Qty 3) 26 RS1-2407-000CN LJ 4+/5 T orsion S pring 27 RS1 -2409-00 0C N LJ4 +/5 T ension Spring 28 RS1-7010-000CN LJ 4+/5 Shaft.
Figure A-26a Duplex Switchback A ssembly (1 of 2) Duplexer A -35.
Figure A-26b Duplex S witchback Asse m bly (2 of 2) A -36 Duplex er.
Ref Part # Notes Description 1 RA2-2083-000CN LJ 4+/5 Static E liminator 2 RA2-2087-000CN LJ4+/5 Deflector Linkag e 3 RA2-2094-000CN LJ4+/ 5 Up per Feed Guide 4 RA2-2095-000CN LJ4+/ 5 Lower F eed Guide 5 RA2-2112-000CN LJ4+/5 Cable Cov er 6 RA2-2116-000CN LJ4+/5 Stepped Screw 3 B y 6.
Ref Part # Notes Description 25 RS1-059 1-000CN LJ4+/ 5 G ear 39T/22T (Qty 2) 26 RS1-0592-000CN LJ4+ /5 Gear 2 9T/54T 27 RS1-2408-0 00CN LJ4+/5 Switch back T ension Spr ing 28 RS1-241 0-000CN LJ4+/ 5 .
B LaserJet 5/5M/5N Printer The Combined S ervice Manual contains information to be used with the LaserJe t4/4+/4M/4M+/5 /5M/5N. In spe cial circumstances, the information in Chapters 1 and 3 will not pertain specifi cally to the Lase rJet 5/5M/5N pr inter (such as the control panel information).
Product Information Features HP LJ 4+ HP LJ4M+ HPLJ5 HPLJ5M HPLJ5N Model C 2037A C2039A C 3916A C3917A C3952 A Printer Speed 12 ppm 12 ppm 12 ppm 12 ppm 12 ppm Resolution 300/600 dpi 300/6 00 dpi 300/.
Product F amily Information The model HP C3916A, C3917A, and C3952A are very similar from a hardwar e service standpoint. T he models HP C2039A and C3917A printers add the following features: • Post.
Accessory D escriptio n Work in the LaserJet 4? Work in the LaserJet 4 Plus? Work in the LaserJet 5? C2082A Envelope Feeder Yes No No C2082B Envelope Feeder Yes Yes No C3927A Envelope Feeder No No Yes.
Identification The model number is on a label p laced on the ou ts ide, rear cover of the printer. The model num ber (C3916A, C 3917A, or C3 952A) is found at th e top of the la bel. The model number is the base number for all printers. The serial number contains information about the printer.
Specifications HP LaserJ et 5 / 5M / 5N Dimension HP LaserJet 5 Width 16.4 in (415mm) Depth 15.9 in (403 mm) Height 11.7 in (297 mm) W eight (with toner car tr idge) 3 7 lbs.
Status 100/115 V 220/240 V Recomm ended Minimum Circuit Capacity 11.2 amps 5.0 amps P eak Inrush Current 19-34 amps 17-40amps 25% Decay Time 8.7-1 6.9 ms 1.4-9.9 ms P eak Fuser Current 65-71 amps 29-34 amps Retur n-to A verage Time 375-475 ms 220-300 ms Table B-6 Electrical S pecificati ons Operating Environment T emperature: 10 ° C to 32.
Related Documentation The following manuals can be ordered from Hewlett-Packard’s Support Materials Organization (SMO). The phone number for SMO is ( 800) 227-8164.
Laser Statement (Sweden/Finland) LASERTURVALLISUUS LUOKAN 1 LASE RLAITE KLASS 1 LASER APPARAT HP LaserJet(s) 5/5M/5N laserkirjoitin on k ä ytt ä j ä n kannalta turvallinen luokan 1 laserlaite. Normaalissa k ä yt ö ss ä kirjoittimen suojakotelointi est ää lasers ä teen p ää syn laitteen ulkopuolelle.
Control P anel Layout The LaserJet 5 control panel consists of a 16-character scrolling display panel a nd six keys, thr ee of which have forwa rd and backward scrolling f unctions. Figure B-2 shows th e display panel. Control P anel Keys The table on the following page explains how the control panel keys work.
Key Explanati on Go The Go ke y replaces the On Line, Form Feed, and Continue ke ys from pre vi ous HP LaserJet printers. The Go k ey perf or ms fiv e main functions: Switches the state of communication be tween computer and print er either on (on line) or of f (off line).
Key Explanati on Item Press Item to cycle through the selected menu ’ s item s. Press the > end of the k e y to m ove f orward through the items. Press the < end of the ke y to m ove bac kward through the items. Menu items var y depending on options inst alled and configuration of other menu choices.
Control P anel Menus Figure B-3 shows the menus and menu items available with the basic printer configuration. Not all menu items are discussed in this section. Only those items of specific interest from a service standpoint, or items new to the printers are dis cussed in this section.
Figure B-3 Control Panel Menu Ma p B-14 LaserJet 5/5M/5N Printer.
Printing Menu Item Options Explanation PRINT MENU MAP No options availab le When PRINT MENU MAP is displa y ed, press Select to print a configuration page and a menu map. The messa ge PRINTING CONFIGURATION PAGE is displa y ed. PWRSA VE OFF , 15 MIN, 30 MIN*, 1 HR, 2 HRS, 3 HRS PWRSAVE stands f or P owerSav e.
Item Options Explanation ORIENT A TION P* L P stands for portrait (ver tical) and L stands for landscape (horizontal) or ientat ion of type on the page. FORM (5 T O 128 LINES) 60* (110V pr inters) 64* (220V printers) Sets vertical spa cing, from 5 to 128 lines, for default paper size.
PCL F onts Menu Item Options Explanation PCL FONT LIST No options avai la bl e Press Select to p rint a l ist of the P CL f onts. SOURCE INTE RNAL* SOFT SLO T N Inter nal fonts* P er manent soft fonts SIMM Mod ule: n=slo t number . T ypefaces stored in one of the f our R OM SIM M slots (SLO T=sl ot 1, f or example).
P ostScript Menu J ob Menu Item Options E xplanation PS FONT LIST No options av a ilable Press Sel ect to print a list o f the fonts. While the list is being printe d, the me ssage PRINTING FONT LIST is display ed. PRT PS ERRS OFF* ON PRT PS ERRS stands f or PRINT POSTSCRIPT ERRORS .
Configuration Menu Item Options Explanation TRA Y 1 FIRST* CASSETTE When set to FIRST , T ra y 1 is configured as the default tra y and will be used first d uring printing if any media is load ed into the tray . TRAY 1=FIRST is not recommended for networked (shared) environments.
Item Options Explanation AU TO CONT OFF* ON Determine s how the printer reacts to d ata errors and printer e rrors. When aut o continue is set to OFF , the pr inter displays an error me ssage and go es off line un til you press Go .
Memory Configuration Menu Item Options Explanation I/O BUFFE R A UT O* OFF ON Memor y set aside for I/O buff ering is automatically deter mined by the printer . No memor y is set aside for I/O b u ffers . Size can be manually adjusted. I/O SIZE 10K and up When IO BUFFER is set to ON , this item app ears in the menu .
P arallel Menu Serial Menu Item Options Explanation HIGH SPEED YES* NO The speed at which d ata is transmitted to th e printe r . If the default value (YES ) results in I/O errors or no communications, set this v alue to NO . Sets the parallel interf ace to run at a higher data rate Sets the parallel interf ace to run at a slower speed.
Resets Menu Note The control panel resets will clear all memory in the printer, while the Job Cancel feature only clears the current job. Menu Selection Printer Response E xplanation MEMOR Y RESET CLEARING MEMORY Press Select to perform a MEMORY RESET .
Te s t M e n u Item Explanation PRINT SELF TEST When PRINT SELF TEST is display ed, press Select to print a self test. PRINT LJ5 DEMO Prints a page that illustrates the LJ5 pr inter features. PRINT CONFIG Pr ints a P o stScript configuration page. PRINT LJ5M DEMO Pr ints a page that illu strates the LJ5M pr inter features.
Service Mo de The Service Mode sho uld be used only by aut horized service personnel. The following can be executed while in the Service Mode: • Print a Service Mode Self Test . • Verify the Page Count, (the page count also is displayed on the standard s elf test).
Setting the P age Count The page count is stored in the printer ’ s Non-Volatile Memory (NVRAM). If it is necessary to replac e the Formatter PCA, the page count should be reset to the printer ’ s original page count to reflect the age of the print engine.
Setting the Cold Reset De fault A Cold Reset procedure returns most user-selectable Control Panel Menu selections to their factory defaults, in cluding Paper Size and Tray 1 Size settings. All 220/240 printers are set from the factory to default to A4 paper size settings when the user performs either a Cold Reset or Factory Default Reset procedure.
Skip Demo If set to TRUE, will disable any test and demo pages containing the HP logo. This setting should only be used by OEMs not wishing to give user-access to t hese pages . Big Data This item will allow a user to increase the amount of status readback buffer if the item is set to ON.
Programming a Flash SIMM A flash SIMM may be programmed while installed in the printer. To program a flash S IMM. 1 Hold down the Menu> , Item< , Value+ , and Select keys while powering on t he printer. 2 The printer will display “ PROGRAM SLOT 4 ” .
Changing the Control P an el Display Language The default control p anel display language is set for English. Supported language s are: English, Fren ch, German, Ita lian, Spanish, Finnish, Danish, Dutch, Swedish, Norwegian, Turkish, Polish, and Portuguese.
NVRAM Init NVRAM Init clears the NVRAM to its initial state. This reset is used when the NVRAM becomes full an d the user would like to add additional personalities.
Understanding the PCL Self T est Printout Reference Explanation (Refer to Figure B-4) 1 Print er Informatio n lists pr inter speci fic statist ics. F or matter Number shows the un i q ue n um b e r assi gned to the formatter bo ard. Fir mware Dat ecode is t he eight-d igit date (YYYY MMDD) code of the Format ter ROM.
Figure B-4 H P LaserJet 5 PCL S elf Test P rintout LaserJet 5/5M/5N Printer B-33.
Infrared Communication The HP LaserJet 5, 5M, and 5N printers are equipped with an Infrared Datalink Associati on (IrDA) com pliant port. The IrDA specification allows “ wireless ” transmission of print data between a wide variety of hosts (primary) and peripheral (secondary) devices.
System Requirements • Hardware • Both the primary and secondary devi ces must be equipped with an I rDA-comp liant IR c omponent. Olde r, non-IrDA-compliant devices may not be compatible with the HP Lase rJet 5/5M/ 5N printers.
T o Print Using the Infrared P ort The C2929A Infrared Transceiver must be plugged into the infrared (IR) port on your HP LaserJ et 5, 5M, or 5N printer, located at the rear of th e printer (Figure B-6). This po rt is compliant with th e specifications determined by the Infrared Data Association (IrDA).
3 Send the print job. The status light on top of the IR pod turns on. (Printing a complex document or using a s oftware print spooler on your PC may delay the time it takes for the IR status light to tur n on.
If you still ha ve problems printing, make sure you are us ing an IrDA-compliant device and proper software and have selected the proper port for printing . Note The IrDA standard for infrared communications represents an emer ging technology. Older non-IrDA-compliant portable devices may not be compatible with your HP LaserJet 5/5M/5N printer.
If all these elements are properly installed and configured, use the IR test tool to test the IrDA protocol transmission and device operation. This tool for troubleshooting IR comm unication problems, shown in Figure 10, has been developed by Genoa Technology, Inc.
On HP Laser-Jet printers , a self-test page wil l be initiated by the test. If the “ TEST ” LED goes out a nd the “ PASS ” LED fails to light, the printer ’ s IR port is not functioning correctly; check the operator ’ s instructions included with the IR test tool.
Infrared P ort Not Responding Situat ion Solu tion The connection cannot be estab lished or the t ransm ission seems to b e taking longer than usual. Make sure the device you are using is IrD A-compliant; look for an IrDA symbol on the device or refer to the manual for the device for IrD A specif ications.
Situation S olution The pr inter pr ints only par t of a page or docum ent. The connection has been brok en during t ransmission. If you move the por table de vice dur ing transm ission, the conn ection c an be broken. I rD A -compliant de vices are design ed to recover from temporar y connection interruption s .
Index ! 12 PRINTER OPEN 7-18 13 PAPER JAM 7-20 14 NO EP CART 7-25 16 TONER LOW 4-10, 7-25 21 PRINT OVERRUN 3-53 41.1 ERROR 7-28 41.2 ERROR 7-28, 7-31 41.
defect Ruler 7-67 defect template 7-67 developing stat ion, drum 5-22 DHHS laser safety 1 -8 Diagnostics B-28 diagrams, timing 5-34 disassembly, fuser 6-47 display language, changing 3-28, B-30 distor.
high voltag e contact assembly 6-68 cont act p late 6-62 contactor removal 6-62 cont acto r/pap er g uide remo val 6- 62 High Voltage Power Supply assembly 7-51 checks 7- 51 removal 6-21 trouble sho o.
lower cassette assemblies removal 6-44 assembly 5-4 drive motor (M 3) 5-10 functional check 7 -24 installing 3-44 paper loading 3-45 pickup motor 7-24 pickup motor removal 6-45 sensor board removal 6-.
paper feed assembly removal 6-18 paper feed guide removal 6-62 paper feed system 5-1, 5-26 paper jam 7-20 detec tion 5- 11 PS1 7-20 trouble sho oting 7-20 paper motion 5-2 paper path MP tray 5-29 PC t.
PS5 check 7-44 MP tray trailing edge sensor 5-7 PS6, lower cassette paper-out s ensor 5-7 PS7, envelope feeder paper- out senso r 5-7 R RAM s ize 3-24 Random Horizontal Black Lines 7-40 READY 7-B rear.
service checkpoint s 4-1, 4-3 Service Mode 3-20, B-25 service/error messages 3-59 setting the cold reset B-27 setting the page count 3-21, B-26 setting up the envelope feeder 3-50 settings, tray swit .
Erro r me ssage s 7- 2 general information 7-1 infrared B- 38 Message Summary T able 7-2 mess ages 7-2 prelimina ry 7-1 Printer messages 7-2 quick checks 7-1 Status message s 7-2 Troubleshooting, IR p.
SN-1 Servi ce No tes.
SN-2 Service Notes.
SN-3 Servi ce No tes.
SN-4 Service Notes.
SN-5 Servi ce No tes.
SN-6 Service Notes.
SN-7 Servi ce No tes.
SN-8 Service Notes.
Copyright © 1996 Hewlett-P ackard Company Printed in USA 3 /96 Manual P art No . C3916-90984 *C3916-90984* *C3916-90984* C3916-90984.
An important point after buying a device HP (Hewlett-Packard) C3952A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought HP (Hewlett-Packard) C3952A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data HP (Hewlett-Packard) C3952A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, HP (Hewlett-Packard) C3952A you will learn all the available features of the product, as well as information on its operation. The information that you get HP (Hewlett-Packard) C3952A will certainly help you make a decision on the purchase.
If you already are a holder of HP (Hewlett-Packard) C3952A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime HP (Hewlett-Packard) C3952A.
However, one of the most important roles played by the user manual is to help in solving problems with HP (Hewlett-Packard) C3952A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device HP (Hewlett-Packard) C3952A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
