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HP LaserJet 4345mfp Series
Service Manual
Copyright and License © 2004 Copyright Hewlett-Packard Development Company, L.P. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained in this document is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Part number Q3942-90950 Edition 1, 11/2004
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Table of contents
1 Product information HP LaserJet 4345mfp configurations......................................................................................................2 HP LaserJet 4345mfp (Q3942A--base model)......................................................................2 HP LaserJet 4345x mfp (Q3943A)..........................................................................................2 HP LaserJet 4345xs mfp (Q3944A)........................................................................................ 3 HP LaserJet 4345xm mfp (Q3945A)......................................................................................3 Features and benefits of the MFP...........................................................................................................4 Functions.................................................................................................................................4 Speed and throughput............................................................................................................4 Resolution...............................................................................................................................4 Memory...................................................................................................................................4 User interface..........................................................................................................................5 Language and fonts ..............................................................................................................5 Copying and sending..............................................................................................................5 Print cartridge..........................................................................................................................5 Paper-handling .......................................................................................................................6 Connectivity.............................................................................................................................6 Environmental features........................................................................................................... 6 Security features..................................................................................................................... 7 Minimum system requirements for e-mail functionality..........................................................7 MFP parts and accessories..................................................................................................................... 8 MFP parts................................................................................................................................8 Interface ports....................................................................................................................... 0 1 Model and serial numbers....................................................................................................10 Accessories and supplies.....................................................................................................11 Parts compatibility with other HP LaserJet products............................................................12 Moving the MFP.................................................................................................................... 4 1 Locking and unlocking optional accessories........................................................................14 Site requirements...................................................................................................................................15 Physical specifications.......................................................................................................... 5 1 Environmental specifications................................................................................................16 MFP specifications................................................................................................................................17 Electrical specifications.........................................................................................................17 Acoustic specifications..........................................................................................................18 Image area............................................................................................................................ 8 1 Skew specifications...............................................................................................................18 Media specifications..............................................................................................................................19 Printing and paper-storage environment..............................................................................19 Envelopes.............................................................................................................................20 Envelopes that have double side seams.............................................................21
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Envelopes that have adhesive strips or flaps......................................................21 Envelope margins................................................................................................21 Envelope storage.................................................................................................21 Labels....................................................................................................................................22 Label construction................................................................................................22 Transparencies.....................................................................................................................22 Supported types and sizes of print media............................................................................23 Regulatory information..........................................................................................................................28 FCC and Telecom regulations..............................................................................................28 FCC regulations...................................................................................................28 Telecom................................................................................................................28 Environmental Product Stewardship program......................................................................29 Protecting the environment..................................................................................29 Ozone production................................................................................................. 9 2 Energy consumption............................................................................................29 HP LaserJet printing supplies..............................................................................29 Material safety data sheet....................................................................................30 For more information............................................................................................31 Country-/region-specific safety statements..........................................................................32 Laser safety statement......................................................................................... 2 3 Canadian DOC statement....................................................................................32 Japanese VCCI statement...................................................................................32 Korean EMI statement.........................................................................................32 Finnish laser statement........................................................................................33 Australia...............................................................................................................33 Declaration of conformity (HP LaserJet 4345mfp)................................................................................34 Declaration of conformity (HP LaserJet 4345x mfp, 4345xs mfp, and 4345xm mfp)...........................35 2 Service approach Service approach...................................................................................................................................38 Ordering parts, accessories, and supplies............................................................................................39 Ordering directly from HP.....................................................................................................39 Ordering directly through the embedded Web server (for MFPs that are connected to a network).............................................................................................................................39 To order directly through the embedded Web server..........................................39 Ordering directly through the HP Toolbox software (for MFPs that are directly connected to a computer).....................................................................................................39 Hewlett-Packard Limited Warranty Statement......................................................................................40 Print Cartridge Limited Warranty Statement.........................................................................................41 Availability of support and service.........................................................................................................42 HP maintenance agreements................................................................................................................ 2 4 Priority Onsite Service..........................................................................................................42 Next business day.................................................................................................................42 Installation and maintenance-kit replacement......................................................................42 3 Installation and configuration Installation checklist...............................................................................................................................44 Connecting to a computer or network...................................................................................................46 Network connection..............................................................................................................46 Parallel connection................................................................................................................46
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Fax connection......................................................................................................................47 Analog faxing........................................................................................................47 Connecting the fax accessory to a phone line....................................47 Configuring and using the fax features...............................................47 Digital faxing.........................................................................................................48 Optional output and input devices.........................................................................................................49 Security features....................................................................................................................................50 Securing the embedded Web server....................................................................................50 To secure the embedded Web server..................................................................50 Foreign Interface Harness (FIH)...........................................................................................50 Requirements.......................................................................................................50 Using the FIH.......................................................................................................50 To enable the FIH portal......................................................................50 To disable the FIH portal ....................................................................51 Secure Disk Erase................................................................................................................51 Data affected........................................................................................................52 Gaining access to Secure Disk Erase..................................................................52 Additional Information..........................................................................................52 Job-storage features............................................................................................................. 2 5 HP DSS authentication.........................................................................................................52 Locking the control-panel menus.......................................................................................... 2 5 Locking the formatter cage...................................................................................................53 4 Maintenance Cleaning the MFP.................................................................................................................................. 6 5 Cleaning the outside of the MFP..........................................................................................56 Cleaning the touchscreen.....................................................................................................56 Cleaning the scanner glass..................................................................................................56 Cleaning the fuser ................................................................................................................56 Running the cleaning page .................................................................................57 To run the cleaning page.....................................................................57 Cleaning the ADF delivery system........................................................................................58 To clean the ADF delivery system.......................................................................58 To clean the ADF rollers......................................................................................59 Calibrating the scanner..........................................................................................................................62 To print the calibration target................................................................................................62 Performing preventive maintenance......................................................................................................63 Printer preventive maintenance ...........................................................................................63 To reset the maintenance-kit counter..................................................................63 The ADF maintenance kit.....................................................................................................64 Managing the print cartridge..................................................................................................................65 HP print cartridges................................................................................................................65 Non-HP print cartridges........................................................................................................65 Print-cartridge authentication................................................................................................ 5 6 Print-cartridge storage..........................................................................................................65 Print-cartridge life expectancy..............................................................................................65 Checking the supply level.....................................................................................................66 To check the supply level by using the control panel..........................................66 To check the supply level by using the embedded Web server..........................66 To check the supply level by using the HP Toolbox software.............................66
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To check the supply levels by using HP Web Jetadmin......................................66 Cartridge-low and cartridge-out conditions...........................................................................66 When the cartridge is low on toner or drum life...................................................66 When the cartridge is out of toner or drum life.....................................................67 Setting the real-time clock.....................................................................................................................68 Setting the date and time...................................................................................................... 8 6 To set the date format..........................................................................................68 To set the date.....................................................................................................68 To set the time format..........................................................................................68 To set the time......................................................................................................69 Setting the wake time............................................................................................................69 To set the wake time............................................................................................69 Setting the sleep delay.........................................................................................................70 To set the sleep delay..........................................................................................70 Configuring and verifying an IP address...............................................................................................71 TCP/IP assignment............................................................................................................... 1 7 Automatic discovery.............................................................................................71 Dynamic host configuration protocol (DHCP)......................................................71 Verifying the TCP/IP configuration........................................................................................71 Changing an IP address.......................................................................................................71 To change an IP address by using HP Web Jetadmin........................................71 To change an IP address by using the embedded Web server..........................72 To change an IP address by using the control panel..........................................72 Upgrading the firmware.........................................................................................................................73 Determining the current level of firmware.............................................................................73 Downloading the new firmware from the HP Web site.........................................................73 Transferring the new firmware to the MFP...........................................................................73 Using FTP to upgrade the firmware on a network connection.............................73 To upgrade the firmware on a network connection by using FTP......74 Using HP Web Jetadmin to upgrade the firmware...............................................75 Using MS-DOS commands to upgrade the firmware..........................................75 Upgrading the HP Jetdirect firmware....................................................................................76 5 Theory of operation Basic operation...................................................................................................................................... 8 7 Sequence of operation (printer)............................................................................................78 Sequence of operation (scanner).........................................................................................79 Formatter system...................................................................................................................................80 Sleep mode........................................................................................................................... 0 8 Resolution Enhancement technology (REt)..........................................................................80 EconoMode........................................................................................................................... 1 8 Input/output........................................................................................................................... 1 8 CPU.......................................................................................................................................81 Memory.................................................................................................................................81 Hard disk..............................................................................................................81 Random-access memory.....................................................................................81 DIMM slots...........................................................................................................81 Flash memory.......................................................................................................82 Firmware flash memory card...............................................................................82 Nonvolatile memory.............................................................................................82
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HP Memory Enhancement technology................................................................82 PJL overview.........................................................................................................................82 PML.......................................................................................................................................82 Control panel.........................................................................................................................82 Scanner interface..................................................................................................................83 Engine-control system........................................................................................................................... 4 8 DC controller PCA.................................................................................................................84 Motors and fans....................................................................................................................86 Motor and fan functions........................................................................................86 Ambient-temperature detection............................................................................87 Engine power supply circuit..................................................................................................87 Fuser control......................................................................................................................... 8 8 Fuser over-temperature protection......................................................................89 High-voltage power supply...................................................................................................91 Low-voltage power supply ...................................................................................................92 Overcurrent/overvoltage protection......................................................................................94 Toner detection..................................................................................................................... 4 9 Cartridge detection................................................................................................................94 Laser/scanner system...........................................................................................................................95 Laser/scanner control...........................................................................................................96 Image-formation system........................................................................................................................ 8 9 Print cartridge........................................................................................................................99 Cartridge memory................................................................................................99 Image-formation process....................................................................................................100 Pickup, feed, and delivery system....................................................................................................... 02 1 Pickup-and-feed block........................................................................................................105 Printing from tray 1.............................................................................................106 Printing from tray 2.............................................................................................107 Media-size detection.........................................................................108 Cassette media-size detection.........................................108 Media-length detection.....................................................108 Media-width detection.......................................................108 Cassette pickup operation.................................................................108 Lifter-driver operation........................................................................110 Multifeed prevention..........................................................................110 Distance-between-pages adjustment................................................111 Media-skew prevention......................................................................................112 Feed-speed control............................................................................................114 Fusing and reversing/delivery block...................................................................................115 Fusing.................................................................................................................115 Face-down delivery............................................................................................115 Face-up delivery.................................................................................................116 Jam detection......................................................................................................................118 Pickup delay jam from tray 1..............................................................................118 Pickup delay jam from tray 2..............................................................................118 Pickup stationary jam.........................................................................................118 Fuser-delivery delay jam....................................................................................119 Fuser wrapping jam............................................................................................119 Fuser-delivery stationary jam when feeding regular-size media.......................119 Fuser-delivery stationary jam when feeding custom-size media.......................119
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Reversing delay jam (face-down delivery only).................................................119 Reversing stationary jam (face-down delivery only)..........................................120 Delivery delay jam during face-down delivery...................................................120 Delivery delay jam during face-up delivery........................................................120 Delivery stationary jam during face-down delivery............................................120 Delivery stationary jam during face-up delivery.................................................120 Door-open jam...................................................................................................120 Residual-media jam...........................................................................................121 Printing from the 500-sheet feeder.....................................................................................122 500-sheet feeder pickup and feeding................................................................123 Duplex-printing unit............................................................................................................. 25 1 Reversing/duplexing pickup...............................................................................125 Duplex printing jam detection.............................................................................126 Duplex-unit-pickup delay jam............................................................127 Duplex-unit stationary jam.................................................................127 Duplex-unit delay jam........................................................................127 3-bin mailbox feed and delivery system.............................................................................128 Stacker mode.....................................................................................................130 Mailbox mode..................................................................................................... 30 1 Function-separator mode...................................................................................130 Jam detection..................................................................................................... 30 1 Feed-delay jam..................................................................................130 Feed-stationary jam...........................................................................131 Residual-media jam...........................................................................131 Stapler/stacker feed and delivery system...........................................................................132 Staple mode.......................................................................................................134 Stacker mode.....................................................................................................134 Staple-jam detection..........................................................................................134 Feed-delay jam..................................................................................134 Feed-stationary jam...........................................................................135 Delivery-stationary jam......................................................................135 Residual-media jam...........................................................................135 Stapler unit.........................................................................................................135 Scanner system................................................................................................................................... 37 1 Electrical system................................................................................................................. 37 1 Motors and fans..................................................................................................................139 Optical assembly.................................................................................................................139 ADF feed system................................................................................................................141 Jam detection......................................................................................................................141 Residual-media jam...........................................................................................141 ADF pickup jam.................................................................................................. 42 1 ADF jam.............................................................................................................142 Registration sensor jam.....................................................................142 Read sensor jam...............................................................................142 Exit sensor jam..................................................................................142 ADF cover open jam..........................................................................................142 ADF open jam....................................................................................................142 6 Removal and replacement Removal and replacement strategy.....................................................................................................144
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Required tools..................................................................................................................... 44 1 Before performing service...................................................................................................145 After completing service.....................................................................................................145 Screws that are used in the MFP........................................................................................146 User-replaceable parts........................................................................................................................147 Print cartridge......................................................................................................................148 Control-panel overlays........................................................................................................ 48 1 Control panel.......................................................................................................................149 Transfer roller......................................................................................................................150 ADF input tray..................................................................................................................... 51 1 ADF pickup and feed rollers...............................................................................................153 ADF separation pad............................................................................................................ 54 1 ADF delivery guide (clear mylar sheet)..............................................................................155 Output-bin assembly........................................................................................................... 57 1 Duplex-printing unit............................................................................................................. 58 1 Fuser-entrance guide..........................................................................................................159 Fuser................................................................................................................................... 60 1 Tray 2, 3, 4, or 5 pickup and feed rollers............................................................................161 Tray 1 pickup roller.............................................................................................................162 Scanner filter cover and scanner filter................................................................................163 ADF-hinge flap.................................................................................................................... 64 1 Formatter cover and formatter............................................................................................166 Hard drive...........................................................................................................................168 DIMMs.................................................................................................................................170 Flash memory card (firmware)............................................................................................ 71 1 Fax accessory..................................................................................................................... 72 1 Covers, doors, and external panels.....................................................................................................173 Top-cover flatbed flange.....................................................................................................174 Front cover.......................................................................................................................... 75 1 Back cover..........................................................................................................................179 Internal assemblies..............................................................................................................................181 Reversing-separation-guide assembly ..............................................................................182 Reversing assembly............................................................................................................183 Main fan (FN101) and reversing-unit fan (FN103).............................................................188 Thermistor (TH3).................................................................................................................193 Tray 2 jam-access-cover switch (SW105)..........................................................................195 Tray 1 assembly..................................................................................................................197 Front-cover support.............................................................................................................200 Tray 1 feed-assembly.........................................................................................................201 Feed-roller assembly..........................................................................................................208 DC controller....................................................................................................................... 11 2 Main motor (M101)..............................................................................................................214 DC controller fan (FN104)...................................................................................................215 Print-cartridge fan (FN102).................................................................................................217 Print-cartridge motor (M102)...............................................................................................219 Top-cover switch (SW101).................................................................................................221 Registration assembly........................................................................................................223 Paper-pickup-drive assembly ............................................................................................227 Lifter-drive assembly...........................................................................................................231 Power-factor-correction (PFC) power supply.....................................................................234
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Engine power supply...........................................................................................................239 Paper-feed assembly.......................................................................................................... 45 2 Tray 2 detection switch.......................................................................................................247 Paper-size-detection switch (SW102)................................................................................248 Tray 2 paper-present sensor (PS101)................................................................................249 Laser/scanner.....................................................................................................................250 Output-bin-full sensor.........................................................................................................252 ADF and scanner components............................................................................................................ 54 2 ADF assembly.....................................................................................................................254 Scanner assembly..............................................................................................................256 Scanner glass.....................................................................................................................261 Optical unit.......................................................................................................................... 64 2 Scanner bulb....................................................................................................................... 68 2 Inverter PCA.......................................................................................................................270 Scanner fan.........................................................................................................................271 Scanner home-position sensor...........................................................................................272 Scanner-controller PCA......................................................................................................274 ADF components................................................................................................................................. 75 2 ADF output-bin extension...................................................................................................276 ADF white mylar-backing.................................................................................................... 78 2 ADF front cover................................................................................................................... 80 2 ADF rear cover ...................................................................................................................281 ADF left-side cover.............................................................................................................282 ADF jam-access cover and latch........................................................................................284 ADF leading-edge and paper-present sensors..................................................................286 ADF hinges.........................................................................................................................287 500-sheet feeder components.............................................................................................................289 500-sheet-feeder pickup and feed rollers...........................................................................289 500-sheet-feeder rear cover...............................................................................................290 500-sheet-feeder right cover...............................................................................................291 500-sheet-feeder front cover..............................................................................................292 500-sheet-feeder upper-left cover......................................................................................294 500-sheet-feeder left-side cover.........................................................................................295 500-sheet-feeder number-plate assembly..........................................................................296 500-sheet-cassette front cover...........................................................................................297 500-sheet-feeder PCA........................................................................................................298 500-sheet-feeder lifter-drive assembly...............................................................................299 500-sheet-feeder paper-size switch...................................................................................300 500-sheet-feeder jam-access-cover-open switch...............................................................302 7 Troubleshooting Troubleshooting process.....................................................................................................................304 Initial troubleshooting checklist...........................................................................................304 Troubleshooting checklist..................................................................................304 Troubleshooting flowchart...................................................................................................306 Power-on checks................................................................................................................308 Power-on troubleshooting overview...................................................................308 Control-panel messages......................................................................................................................310 Using the MFP help system................................................................................................ 10 3 Resolving control-panel messages.....................................................................................310
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Accessory lights for the 3-bin mailbox and stapler/stacker.................................................................332 Accessory lights ................................................................................................................. 32 3 Formatter lights....................................................................................................................................333 Copy-board LED.................................................................................................................333 HP Jetdirect LEDs...............................................................................................................333 Heartbeat LED....................................................................................................................334 Fax LED.............................................................................................................................. 34 3 Jams....................................................................................................................................................335 Clearing jams from the top-cover and print-cartridge areas...............................................337 Clearing jams from the optional envelope-feeder area......................................................339 Clearing jams from the tray 1 area.....................................................................................341 Clearing jams from the tray 2, 3, 4, or 5 areas...................................................................343 Clearing jams from the optional duplexer...........................................................................345 Clearing jams from the output areas..................................................................................347 Clearing jams from the fuser...............................................................................................349 To clear jams from the fuser..............................................................................349 Clearing jams from the ADF...............................................................................................353 Clearing staple jams...........................................................................................................354 Solving repeated jams........................................................................................................356 Causes of persistent jams..................................................................................................357 Jams in the top-cover and print-cartridge area..................................................357 Jams in the envelope-feeder area and the tray 1 area......................................358 Jams in the tray 2 area and the optional 500-sheet feeder areas.....................358 Jams in the duplexing area................................................................................359 Jams in the output area......................................................................................359 Jams in the fuser................................................................................................361 Jams in the ADF.................................................................................................361 Using the paper-path test...................................................................................................362 Using the scanner tests......................................................................................................362 Image-formation troubleshooting.........................................................................................................363 Media-related print-quality problems..................................................................................363 Overhead transparency defects..........................................................................................364 Print-quality problems that are related to the environment................................................364 Print-quality problems that are related to jams...................................................................364 Image-defect examples......................................................................................................365 Light print (partial page) ....................................................................................367 Light print (entire page) .....................................................................................368 Specks or dots ..................................................................................................369 Dropouts ............................................................................................................ 70 3 Lines .................................................................................................................. 72 3 Horizontal lines...................................................................................................373 Gray background ...............................................................................................374 Loose toner or toner smear ...............................................................................375 Repeating defects and repeating images .........................................................376 Misformed characters ........................................................................................377 Page skew..........................................................................................................378 Curl or wave ......................................................................................................379 Wrinkles or creases ...........................................................................................380 Vertical white lines ............................................................................................381 Horizontal white lines.........................................................................................382
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Tire tracks ..........................................................................................................383 White spots on black .........................................................................................384 Scattered lines ..................................................................................................385 Blurred print .......................................................................................................386 Random image repetition ..................................................................................387 Blank page (ADF)...............................................................................................388 Page skew (ADF)...............................................................................................389 Vertical lines (ADF)............................................................................................390 Image shifted (ADF)...........................................................................................391 Unexpected image (ADF)...................................................................................391 Repetitive defect ruler......................................................................................................... 92 3 Media-transport problems....................................................................................................................394 E-mail problems...................................................................................................................................396 To validate the SMTP gateway address.............................................................................396 To validate the LDAP gateway address.............................................................................396 Fax problems....................................................................................................................................... 97 3 Network connectivity problems............................................................................................................397 Troubleshooting network printing problems .......................................................................397 Loopback test......................................................................................................................397 Ping test.............................................................................................................................. 98 3 Functional checks................................................................................................................................ 99 3 Engine test.......................................................................................................................... 99 3 Formatter test......................................................................................................................399 Half self-test........................................................................................................................ 00 4 Drum-rotation test...............................................................................................................400 MFP resets..........................................................................................................................................401 Cold reset............................................................................................................................401 NVRAM initialization...........................................................................................................401 Hard-disk initialization......................................................................................................... 02 4 Tools for troubleshooting..................................................................................................................... 03 4 Using the embedded Web server.......................................................................................403 Opening the embedded Web server..................................................................403 Information tab...................................................................................................404 Settings tab........................................................................................................404 Digital Sending tab.............................................................................................405 Networking tab ..................................................................................................405 Other links..........................................................................................................405 Using the HP Toolbox......................................................................................................... 07 4 Supported operating systems............................................................................407 Supported browsers...........................................................................................407 Opening the HP Toolbox....................................................................................408 Status tab...........................................................................................................408 Alerts tab............................................................................................................408 Set up Status Alerts page..................................................................409 Administrative settings page.............................................................409 Device Settings window.....................................................................................409 Toolbox links......................................................................................................409 Other links..........................................................................................................409 Using HP Web Jetadmin software......................................................................................410 Information pages...............................................................................................................411
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To print an information page..............................................................................411 Menu map..........................................................................................................411 Configuration pages...........................................................................................412 Configuration page............................................................................412 HP Jetdirect page..............................................................................414 Finding important information on the configuration pages................415 Supplies status page..........................................................................................417 Usage page........................................................................................................ 18 4 PCL or PS font list.............................................................................................. 19 4 Diagnostics menu...............................................................................................................420 Individual component diagnostics.......................................................................................423 Paper-path-sensor test.......................................................................................423 Manual sensor test.............................................................................................424 Scanner tests.....................................................................................................425 Component test.................................................................................................. 25 4 Service menu...................................................................................................................... 26 4 Service ID...........................................................................................................................428 Restoring the Service ID....................................................................................428 Converting the service ID to an actual date.......................................................428 Troubleshooting the embedded HP Jetdirect print server..................................................429 Firmware-stack trace..........................................................................................................429 Diagrams for troubleshooting..............................................................................................................430 DC controller connections...................................................................................................430 Scanner-controller PCA connections..................................................................................432 Locations of major components.......................................................................................... 33 4 Sensors and switches........................................................................................435 Cassette sensors...............................................................................435 Sensors in the print-cartridge area....................................................436 Sensors on the reversing unit (top side)...........................................437 Sensors in the interior of the MFP.....................................................438 Output-bin detection switch, SW103.................................................439 Tray 1 paper-present sensor, PS105................................................439 Top-cover switch, SW101.................................................................440 Tray 2 jam-access-cover switch, SW105..........................................440 Motors, fans, solenoids, and clutch....................................................................441 Front-side fans...................................................................................441 Rear-side fans...................................................................................442 Rear-side motors (1 of 2)..................................................................443 Rear-side motors (2 of 2)..................................................................444 Rear-side solenoid............................................................................444 Reversing-unit motors and solenoids................................................445 Right, rear corner components (1 of 2).............................................446 Right, rear corner components (2 of 2).............................................447 Scanner and ADF components..........................................................................448 ADF output-bin-full sensor.................................................................448 ADF pickup assembly sensors..........................................................449 ADF motors, solenoid, and sensors..................................................450 General timing chart............................................................................................................451 General circuit diagrams..................................................................................................... 53 4
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8 Parts and diagrams How to order parts, supplies, and accessories...................................................................................458 How to use the parts lists and diagrams.............................................................................................458 Screws that are used in the MFP........................................................................................................459 Customer-replaceable parts and accessories.............................................................................