HP LaserJet 4345mfp Series Service Manual - ENWW

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8 Parts and diagramsHow to order parts, supplies, and accessories...................................................................................458How to use the parts lists and diagrams.............................................................................................458Screws that are used in the MFP........................................................................................................459Customer-replaceable parts and accessories.....................................................................................460Accessories.........................................................................................................................460Customer-replaceable components (print engine).............................................................462Customer-replaceable components (ADF and scanner)....................................................464Cables and interfaces.........................................................................................................466Control panel and control-panel overlays...........................................................................468Memory...............................................................................................................................470Print cartridge and maintenance kits..................................................................................472Documentation, software, and training material..................................................................................474Assembly locations..............................................................................................................................476External components...........................................................................................................................480Print-engine internal components........................................................................................................482Upper-plate assembly.........................................................................................................482Internal components (1 of 5)...............................................................................................484Internal components (2 of 5)...............................................................................................486Internal components (3 of 5)...............................................................................................488Internal components (4 of 5)...............................................................................................490Internal components (5 of 5)...............................................................................................492Electrical/forward assembly................................................................................................494Main drive assembly...........................................................................................................496Paper-pickup-drive assembly.............................................................................................498Lifter-drive assembly...........................................................................................................500Cassette..............................................................................................................................502Paper-feed roller assembly.................................................................................................504Registration assembly........................................................................................................506Multipurpose assembly.......................................................................................................508Reverse assembly..............................................................................................................510Reverse-separation-guide assembly..................................................................................512Delivery assembly...............................................................................................................514Fuser...................................................................................................................................516ADF components.................................................................................................................................518ADF assembly.....................................................................................................................518ADF internal components (1 of 3).......................................................................................520ADF internal components (2 of 3).......................................................................................522ADF internal components (3 of 3).......................................................................................524ADF input tray.....................................................................................................................526ADF separation pad............................................................................................................528ADF separation-pad case...................................................................................................530ADF pickup-roller assembly................................................................................................532ADF pickup-roller cover......................................................................................................534ADF mylar-holder assembly...............................................................................................536ADF mylar replacement kit.................................................................................................538Scanner components...........................................................................................................................540Scanner glass and cover....................................................................................................540Scanner-base components.................................................................................................542Scanner flatbed-unit assembly...........................................................................................544xiv
Scanner covers...................................................................................................................546Scanner-carriage-lock assembly........................................................................................548Scanner-open-sensor assembly.........................................................................................550Scanner-motor fan..............................................................................................................552Scanner motor....................................................................................................................554Scanner-belt assembly.......................................................................................................556Scanner slide-rail................................................................................................................558Scanner optical assembly...................................................................................................560500-sheet feeder components.............................................................................................................562Assembly locations.............................................................................................................562External components..........................................................................................................564500-sheet feeder main body (1 of 2)..................................................................................566500-sheet feeder main body (2 of 2)..................................................................................568500-sheet feeder lifter-drive assembly...............................................................................570500-sheet feeder cassette..................................................................................................572Optional devices..................................................................................................................................574Duplex-printing accessory..................................................................................................574Stapler/stacker....................................................................................................................5763-bin mailbox.......................................................................................................................578Alphabetical parts list...........................................................................................................................580Numerical parts list..............................................................................................................................593Index....................................................................................................................................................................607xv
Page 3 and 4: HP LaserJet 4345mfp SeriesService M
Page 5 and 6: Table of contents1 Product informat
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: To print an information page.......
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
Page 254 and 255:
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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HP LaserJet 4345mfp Series Service Manual - ENWW

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