HP LaserJet 4345mfp Series Service Manual - ENWW

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Copyright and License© 2004 Copyright Hewlett-PackardDevelopment Company, L.P.Reproduction, adaptation, or translationwithout prior written permission isprohibited, except as allowed under thecopyright laws.The information contained in this documentis subject to change without notice.The only warranties for HP products andservices are set forth in the expresswarranty statements accompanying suchproducts and services. Nothing hereinshould be construed as constituting anadditional warranty. HP shall not be liablefor technical or editorial errors or omissionscontained herein.Trademark CreditsJava is a US trademark of SunMicrosystems, Inc.Linux is a U.S. registered trademark ofLinus Torvalds.Microsoft ® , Windows ® , and Windows NT ®are U.S. registered trademarks of MicrosoftCorporation.PostScript ® is a trademark of AdobeSystems Incorporated.ENERGY STAR ® and the ENERGY STARlogo ® are U.S. registered marks of theUnited States Environmental ProtectionAgency.Part number Q3942-90950Edition 1, 11/2004
Table of contents1 Product informationHP LaserJet 4345mfp configurations......................................................................................................2HP LaserJet 4345mfp (Q3942A—base model)......................................................................2HP LaserJet 4345x mfp (Q3943A)..........................................................................................2HP LaserJet 4345xs mfp (Q3944A)........................................................................................3HP LaserJet 4345xm mfp (Q3945A)......................................................................................3Features and benefits of the MFP...........................................................................................................4Functions.................................................................................................................................4Speed and throughput............................................................................................................4Resolution...............................................................................................................................4Memory...................................................................................................................................4User interface..........................................................................................................................5Language and fonts ..............................................................................................................5Copying and sending..............................................................................................................5Print cartridge..........................................................................................................................5Paper-handling .......................................................................................................................6Connectivity.............................................................................................................................6Environmental features...........................................................................................................6Security features.....................................................................................................................7Minimum system requirements for e-mail functionality..........................................................7MFP parts and accessories.....................................................................................................................8MFP parts................................................................................................................................8Interface ports.......................................................................................................................10Model and serial numbers....................................................................................................10Accessories and supplies.....................................................................................................11Parts compatibility with other HP LaserJet products............................................................12Moving the MFP....................................................................................................................14Locking and unlocking optional accessories........................................................................14Site requirements...................................................................................................................................15Physical specifications..........................................................................................................15Environmental specifications................................................................................................16MFP specifications................................................................................................................................17Electrical specifications.........................................................................................................17Acoustic specifications..........................................................................................................18Image area............................................................................................................................18Skew specifications...............................................................................................................18Media specifications..............................................................................................................................19Printing and paper-storage environment..............................................................................19Envelopes.............................................................................................................................20Envelopes that have double side seams.............................................................21iii
Page 3: HP LaserJet 4345mfp SeriesService M
Page 7 and 8: Fax connection.....................
Page 9 and 10: HP Memory Enhancement technology...
Page 11 and 12: Required tools.....................
Page 13 and 14: Accessory lights for the 3-bin mail
Page 15 and 16: To print an information page.......
Page 17 and 18: Scanner covers.....................
Page 19 and 20: List of tablesTable 1-1 Parts compa
Page 21: Table 8-48 Scanner-belt assembly...
Page 24 and 25: Figure 5-41 ADF paper path and sens
Page 26 and 27: Figure 6-100 Remove the feed-roller
Page 28 and 29: Figure 6-200 Remove the scanner-con
Page 30 and 31: Figure 8-37 ADF pickup-roller assem
Page 32 and 33: HP LaserJet 4345mfp configurationsT
Page 34 and 35: Features and benefits of the MFPThe
Page 36 and 37: Paper-handling■Input■■■■
Page 38 and 39: MFP parts and accessoriesBefore usi
Page 40 and 41: Interface portsThe MFP has five por
Page 42 and 43: Parts compatibility with other HP L
Page 44 and 45: Moving the MFPBefore moving the MFP
Page 46 and 47: Environmental specificationsTable 1
Page 48 and 49: Acoustic specificationsTable 1-7 So
Page 50 and 51: 45% to 55%. The following guideline
Page 52 and 53: LabelsCAUTION To avoid damaging the
Page 54 and 55:
Table 1-9 Tray 1 supported sizes an
Page 56 and 57:
Table 1-13 Optional 3-bin mailbox o
Page 58 and 59:
Regulatory informationFCC and Telec
Page 60 and 61:
Since 1992, HP has offered HP Laser
Page 62 and 63:
Country-/region-specific safety sta
Page 64 and 65:
Declaration of conformity (HP Laser
Page 66 and 67:
36 1 Product information
Page 68 and 69:
Service approachMFP repair normally
Page 70 and 71:
Hewlett-Packard Limited Warranty St
Page 72 and 73:
Availability of support and service
Page 74 and 75:
Installation checklistWhen setting
Page 76 and 77:
Connecting to a computer or network
Page 78 and 79:
troubleshooting problems with the f
Page 80 and 81:
Security featuresSeveral important
Page 82 and 83:
Data affectedData affected (covered
Page 84 and 85:
54 3 Installation and configuration
Page 86 and 87:
Cleaning the MFPTo maintain print q
Page 88 and 89:
Cleaning the ADF delivery systemCle
Page 90 and 91:
4 Close the scanner lid.5 Pull the
Page 92 and 93:
Calibrating the scannerCalibrate th
Page 94 and 95:
The ADF maintenance kitAfter feedin
Page 96 and 97:
Checking the supply levelYou can ch
Page 98 and 99:
Setting the real-time clockUse the
Page 100 and 101:
9 The settings are saved and the co
Page 102 and 103:
3 Click the column header of your c
Page 104 and 105:
To upgrade the firmware on a networ
Page 106 and 107:
Upgrading the HP Jetdirect firmware
Page 108 and 109:
Basic operationAll high-level MFP p
Page 110 and 111:
Formatter systemThe formatter is re
Page 112 and 113:
Flash memoryTwo flash memory slots
Page 114 and 115:
Engine-control systemThe control sy
Page 116 and 117:
Motors and fansThe MFP print engine
Page 118 and 119:
Fuser controlThe fuser-control circ
Page 120 and 121:
Figure 5-4 Fuser circuit90 5 Theory
Page 122 and 123:
electrostatic image on the primary
Page 124 and 125:
Overcurrent/overvoltage protectionI
Page 126 and 127:
photosensitive drum. The modulated
Page 128 and 129:
Image-formation systemThe image-for
Page 130 and 131:
Writing timing■■When printing i
Page 132 and 133:
Pickup, feed, and delivery systemTh
Page 134 and 135:
Figure 5-13 Sensor and switch locat
Page 136 and 137:
Printing from tray 1The tray 1 pape
Page 138 and 139:
Media-size detectionThe MFP has thr
Page 140 and 141:
Lifter-driver operationThe lifter d
Page 142 and 143:
Media-skew preventionThe MFP uses a
Page 144 and 145:
Feed-speed controlTo ensure that th
Page 146 and 147:
Figure 5-24 Face-down delivery: med
Page 148 and 149:
Jam detectionThe MFP uses the follo
Page 150 and 151:
Reversing stationary jam (face-down
Page 152 and 153:
Printing from the 500-sheet feederT
Page 154 and 155:
Figure 5-29 500-sheet feeder pickup
Page 156 and 157:
Figure 5-31 Duplex printing control
Page 158 and 159:
3-bin mailbox feed and delivery sys
Page 160 and 161:
Stacker modeWhen configured for sta
Page 162 and 163:
Stapler/stacker feed and delivery s
Page 164 and 165:
Staple modeWhen the print job speci
Page 166 and 167:
Figure 5-36 Stapler unit operation1
Page 168 and 169:
Figure 5-38 Scanner assembly electr
Page 170 and 171:
Figure 5-40 Scan carriage movement1
Page 172 and 173:
ADF pickup jamIf the leading edge o
Page 174 and 175:
Removal and replacement strategyThi
Page 176 and 177:
Screws that are used in the MFPThe
Page 178 and 179:
Print cartridge1 Open the top cover
Page 180 and 181:
Transfer roller1 Remove the print c
Page 182 and 183:
3 Remove the ADF input tray.Figure
Page 184 and 185:
ADF separation pad1 Open the ADF to
Page 186 and 187:
3 If necessary, pull the ADF delive
Page 188 and 189:
Duplex-printing unit1 Slide the dup
Page 190 and 191:
FuserCAUTION The fuser is very hot.
Page 192 and 193:
Tray 1 pickup roller1 Open tray 1.N
Page 194 and 195:
ADF-hinge flap1 Use a small, flat-b
Page 196 and 197:
Formatter cover and formatter1 Slid
Page 198 and 199:
Hard driveWARNING! The MFP contains
Page 200 and 201:
DIMMsWARNING! The MFP contains comp
Page 202 and 203:
Fax accessoryWARNING! The MFP conta
Page 204 and 205:
Top-cover flatbed flange1 Grasp one
Page 206 and 207:
3 Open the top cover, and remove on
Page 208 and 209:
7 Flex the bottom of the cover away
Page 210 and 211:
4 Release three locking tabs along
Page 212 and 213:
Reversing-separation-guide assembly
Page 214 and 215:
3 Unlock the tab on the right-rever
Page 216 and 217:
5 Push up on the swing-arm-locking
Page 218 and 219:
Main fan (FN101) and reversing-unit
Page 220 and 221:
6 Disconnect one connector (callout
Page 222 and 223:
10 Release the three locking tabs o
Page 224 and 225:
4 Disconnect two locking tabs (one
Page 226 and 227:
4 Disconnect the jam-access-cover-s
Page 228 and 229:
3 Unclip the sensor-flag holder fro
Page 230 and 231:
Front-cover support1 Remove the tra
Page 232 and 233:
3 Remove the shaft from the jam-acc
Page 234 and 235:
7 Remove six screws (callout 2) fro
Page 236 and 237:
11 Remove seven screws (callout 5),
Page 238 and 239:
Feed-roller assembly1 Remove the tr
Page 240 and 241:
6 Reinstallation tip: When the feed
Page 242 and 243:
Page 244 and 245:
Main motor (M101)1 Remove the dc co
Page 246 and 247:
4 Unwind the connector wire from th
Page 248 and 249:
4 Disconnect the fan connector (J78
Page 250 and 251:
Page 252 and 253:
3 Use a small, flat-blade screwdriv
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3 Unhook the lifter-drive-assembly
Page 256 and 257:
7 Remove five screws (callout 5), a
Page 258 and 259:
Page 260 and 261:
8 CAUTION: Do not let the pickup ro
Page 262 and 263:
Page 264 and 265:
Power-factor-correction (PFC) power
Page 266 and 267:
5 Remove one screw (callout 4), pus
Page 268 and 269:
9 Disconnect three connectors (call
Page 270 and 271:
3 Remove seven screws (callout 2),
Page 272 and 273:
7 Remove two screws (callout 10), r
Page 274 and 275:
11 Reach inside the MFP, lift up on
Page 276 and 277:
3 Release the paper-feed-assembly a
Page 278 and 279:
Paper-size-detection switch (SW102)
Page 280 and 281:
Laser/scanner1 Remove the following
Page 282 and 283:
Output-bin-full sensor1 Remove the
Page 284 and 285:
ADF and scanner componentsThe proce
Page 286 and 287:
Scanner assembly1 Remove the ADF as
Page 288 and 289:
5 Close the top cover. Remove two s
Page 290 and 291:
8 Slide the scanner slightly to the
Page 292 and 293:
4 Remove three screws (callout 2).F
Page 294 and 295:
Optical unit1 Remove the following
Page 296 and 297:
5 Flex the side of the scanner chas
Page 298 and 299:
8 When the FCC cable-guide is reins
Page 300 and 301:
Inverter PCA1 Remove the following
Page 302 and 303:
Scanner home-position sensor1 Remov
Page 304 and 305:
Scanner-controller PCA1 Remove two
Page 306 and 307:
ADF output-bin extension1 Open the
Page 308 and 309:
ADF white mylar-backing1 Open the A
Page 310 and 311:
ADF front cover1 Remove the ADF inp
Page 312 and 313:
ADF left-side cover1 Remove the fol
Page 314 and 315:
ADF jam-access cover and latch1 Rem
Page 316 and 317:
ADF leading-edge and paper-present
Page 318 and 319:
3 Remove two screws (callout 2) fro
Page 320 and 321:
500-sheet-feeder rear cover1 Remove
Page 322 and 323:
500-sheet-feeder front cover1 Remov
Page 324 and 325:
500-sheet-feeder upper-left coverRe
Page 326 and 327:
500-sheet-feeder number-plate assem
Page 328 and 329:
500-sheet-feeder PCA1 Remove the 50
Page 330 and 331:
500-sheet-feeder paper-size switch1
Page 332 and 333:
500-sheet-feeder jam-access-cover-o
Page 334 and 335:
Troubleshooting processWhen the MFP
Page 336 and 337:
Troubleshooting flowchartThis flowc
Page 338 and 339:
Power-on checksThe basic MFP functi
Page 340 and 341:
Control-panel messagesMessages appe
Page 342 and 343:
Table 7-2 Control-panel messages (c
Page 344 and 345:
Page 346 and 347:
Page 348 and 349:
Page 350 and 351:
Page 352 and 353:
Page 354 and 355:
Page 356 and 357:
Page 358 and 359:
Page 360 and 361:
Page 362 and 363:
Accessory lights for the 3-bin mail
Page 364 and 365:
Heartbeat LEDThe heartbeat LED indi
Page 366 and 367:
Table 7-3 Control-panel messages fo
Page 368 and 369:
5 Rotate the paper-release guide to
Page 370 and 371:
4 Insert the optional envelope feed
Page 372 and 373:
5 Rotate the paper-release guide to
Page 374 and 375:
5 Slide the tray into the MFP.6 If
Page 376 and 377:
5 Reinstall the duplexer.6 Reinstal
Page 378 and 379:
5 If you are using a 3-bin mailbox,
Page 380 and 381:
6 If you can see either the leading
Page 382 and 383:
14 Reinstall the duplexer or the du
Page 384 and 385:
Clearing staple jamsOccasionally, s
Page 386 and 387:
Solving repeated jamsSituationSolut
Page 388 and 389:
Jams in the envelope-feeder area an
Page 390 and 391:
Table 7-8 Causes of jams in the out
Page 392 and 393:
Using the paper-path testThe paper-
Page 394 and 395:
Overhead transparency defectsOverhe
Page 396 and 397:
Table 7-11 Defects that can occur d
Page 398 and 399:
Light print (entire page)Begin by p
Page 400 and 401:
DropoutsTable 7-16 DropoutsPossible
Page 402 and 403:
LinesAaBbCcAaBbCcAaBbCcAaBbCcAaBbCc
Page 404 and 405:
Gray backgroundPossible cause1 The
Page 406 and 407:
Repeating defects and repeating ima
Page 408 and 409:
Page skewPossible cause1 The media
Page 410 and 411:
Wrinkles or creasesPossible cause1
Page 412 and 413:
Horizontal white linesPossible caus
Page 414 and 415:
White spots on blackPossible cause1
Page 416 and 417:
Blurred printPossible cause1 The me
Page 418 and 419:
Blank page (ADF)First, verify that
Page 420 and 421:
Vertical lines (ADF)Possible causeS
Page 422 and 423:
Repetitive defect rulerDefects on r
Page 424 and 425:
Media-transport problemsThe followi
Page 426 and 427:
E-mail problemsIf you are unable to
Page 428 and 429:
To perform the loopback test1 Disco
Page 430 and 431:
Half self-testUse the half self-tes
Page 432 and 433:
After performing an NVRAM initializ
Page 434 and 435:
Information tabThe Information page
Page 436 and 437:
the embedded Web server, you must c
Page 438 and 439:
Opening the HP ToolboxTo view the H
Page 440 and 441:
■Product Support. Connects to the
Page 442 and 443:
Configuration pagesDepending on the
Page 444 and 445:
HP Jetdirect pageThe second configu
Page 446 and 447:
Table 7-20 Important information on
Page 448 and 449:
Usage pageThe usage page provides i
Page 450 and 451:
Diagnostics menuThe following table
Page 452 and 453:
Item Options Values ExplanationSCAN
Page 454 and 455:
Manual sensor testThe manual sensor
Page 456 and 457:
Service menuAuthorized HP service t
Page 458 and 459:
Service IDThis information appears
Page 460 and 461:
Diagrams for troubleshootingUse the
Page 462 and 463:
Scanner-controller PCA connectionsF
Page 464 and 465:
ComponentReversing intermediate PCA
Page 466 and 467:
Sensors in the print-cartridge area
Page 468 and 469:
Sensors in the interior of the MFPF
Page 470 and 471:
Top-cover switch, SW101Figure 7-10
Page 472 and 473:
Rear-side fansFigure 7-13 Rear-side
Page 474 and 475:
Rear-side motors (2 of 2)Figure 7-1
Page 476 and 477:
Right, rear corner components (1 of
Page 478 and 479:
Scanner and ADF componentsThe photo
Page 480 and 481:
ADF motors, solenoid, and sensorsFi
Page 482 and 483:
Figure 7-24 General timing chart (2
Page 484 and 485:
Figure 7-26 General circuit diagram
Page 486 and 487:
Figure 7-28 Circuit diagram for the
Page 488 and 489:
How to order parts, supplies, and a
Page 490 and 491:
Customer-replaceable parts and acce
Page 492 and 493:
Customer-replaceable components (pr
Page 494 and 495:
Customer-replaceable components (AD
Page 496 and 497:
Cables and interfacesFigure 8-4 Cab
Page 498 and 499:
Control panel and control-panel ove
Page 500 and 501:
MemoryFigure 8-6 Memory470 8 Parts
Page 502 and 503:
Print cartridge and maintenance kit
Page 504 and 505:
Documentation, software, and traini
Page 506 and 507:
Assembly locationsFigure 8-9 Print-
Page 508 and 509:
Figure 8-10 Print-engine assemblies
Page 510 and 511:
External componentsFigure 8-11 Exte
Page 512 and 513:
Print-engine internal componentsUpp
Page 514 and 515:
Internal components (1 of 5)Figure
Page 516 and 517:
Page 518 and 519:
Page 520 and 521:
Page 522 and 523:
Page 524 and 525:
Electrical/forward assemblyFigure 8
Page 526 and 527:
Main drive assemblyFigure 8-19 Main
Page 528 and 529:
Paper-pickup-drive assemblyFigure 8
Page 530 and 531:
Lifter-drive assemblyFigure 8-21 Li
Page 532 and 533:
CassetteFigure 8-22 Cassette502 8 P
Page 534 and 535:
Paper-feed roller assemblyFigure 8-
Page 536 and 537:
Registration assemblyFigure 8-24 Re
Page 538 and 539:
Multipurpose assemblyFigure 8-25 Mu
Page 540 and 541:
Reverse assemblyFigure 8-26 Reverse
Page 542 and 543:
Reverse-separation-guide assemblyFi
Page 544 and 545:
Delivery assemblyFigure 8-28 Delive
Page 546 and 547:
FuserFigure 8-29 Fuser516 8 Parts a
Page 548 and 549:
ADF componentsADF assemblyFigure 8-
Page 550 and 551:
ADF internal components (1 of 3)Fig
Page 552 and 553:
ADF internal components (2 of 3)12F
Page 554 and 555:
ADF internal components (3 of 3)Fig
Page 556 and 557:
ADF input trayFigure 8-34 ADF input
Page 558 and 559:
ADF separation padFigure 8-35 ADF s
Page 560 and 561:
ADF separation-pad caseFigure 8-36
Page 562 and 563:
ADF pickup-roller assemblyFigure 8-
Page 564 and 565:
ADF pickup-roller coverFigure 8-38
Page 566 and 567:
ADF mylar-holder assemblyFigure 8-3
Page 568 and 569:
ADF mylar replacement kitFigure 8-4
Page 570 and 571:
Scanner componentsScanner glass and
Page 572 and 573:
Scanner-base componentsFigure 8-42
Page 574 and 575:
Scanner flatbed-unit assemblyFigure
Page 576 and 577:
Scanner coversFigure 8-44 Scanner c
Page 578 and 579:
Scanner-carriage-lock assemblyFigur
Page 580 and 581:
Scanner-open-sensor assemblyFigure
Page 582 and 583:
Scanner-motor fanFigure 8-47 Scanne
Page 584 and 585:
Scanner motorFigure 8-48 Scanner mo
Page 586 and 587:
Scanner-belt assemblyFigure 8-49 Sc
Page 588 and 589:
Scanner slide-railFigure 8-50 Scann
Page 590 and 591:
Scanner optical assemblyFigure 8-51
Page 592 and 593:
500-sheet feeder componentsAssembly
Page 594 and 595:
External componentsFigure 8-53 500-
Page 596 and 597:
500-sheet feeder main body (1 of 2)
Page 598 and 599:
500-sheet feeder main body (2 of 2)
Page 600 and 601:
500-sheet feeder lifter-drive assem
Page 602 and 603:
500-sheet feeder cassetteFigure 8-5
Page 604 and 605:
Optional devicesDuplex-printing acc
Page 606 and 607:
Stapler/stackerFigure 8-59 Stapler/
Page 608 and 609:
3-bin mailboxFigure 8-60 3-bin mail
Page 610 and 611:
Alphabetical parts listTable 8-59 A
Page 612 and 613:
Table 8-59 Alphabetical parts list
Page 614 and 615:
Page 616 and 617:
Page 618 and 619:
Page 620 and 621:
Page 622 and 623:
Page 624 and 625:
Table 8-60 Numerical parts list (co
Page 626 and 627:
Page 628 and 629:
Page 630 and 631:
Page 632 and 633:
Page 634 and 635:
Page 636 and 637:
606 8 Parts and diagrams
Page 638 and 639:
sensors, diagrams 448sensors, remov
Page 640 and 641:
electrical specifications 17embedde
Page 642 and 643:
embedded Web server settings405erro
Page 644 and 645:
everse-separation-guideassembly 512
Page 646 and 647:
power specifications 17wake time 69
Page 648:
firmware updates 75IP address, chan
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