HP LaserJet 4345mfp Series Service Manual - ENWW

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MFP parts and accessoriesBefore using the MFP, familiarize yourself with the parts of the MFP.MFP parts1 ADF assembly2 ADF top cover3 ADF input tray4 Top cover (provides access to the print cartridge)5 Top-cover lever6 Tray 1 (multipurpose tray)7 Jam-access lever (for tray 2)8 Tray-number indicator9 Paper-level indicator10 Control-panel keypad11 Control-panel display12 Control-panel status lights13 Scanner lock (raise the ADF for access)8 1 Product information
14 Output bin15 Optional duplexer16 On/off switch17 Power connection18 Interface ports19 Formatter cover (provides access to the flash memory cards and the hard disk)MFP parts and accessories 9
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 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 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
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4 Close the scanner lid.5 Pull the
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Calibrating the scannerCalibrate th
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The ADF maintenance kitAfter feedin
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Checking the supply levelYou can ch
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Setting the real-time clockUse the
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9 The settings are saved and the co
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3 Click the column header of your c
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To upgrade the firmware on a networ
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Upgrading the HP Jetdirect firmware
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Basic operationAll high-level MFP p
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Formatter systemThe formatter is re
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Flash memoryTwo flash memory slots
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Engine-control systemThe control sy
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Motors and fansThe MFP print engine
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Fuser controlThe fuser-control circ
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Figure 5-4 Fuser circuit90 5 Theory
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electrostatic image on the primary
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Overcurrent/overvoltage protectionI
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photosensitive drum. The modulated
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Image-formation systemThe image-for
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Writing timing■■When printing i
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Pickup, feed, and delivery systemTh
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Figure 5-13 Sensor and switch locat
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Printing from tray 1The tray 1 pape
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Media-size detectionThe MFP has thr
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Lifter-driver operationThe lifter d
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Media-skew preventionThe MFP uses a
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Feed-speed controlTo ensure that th
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Figure 5-24 Face-down delivery: med
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Jam detectionThe MFP uses the follo
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Reversing stationary jam (face-down
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Printing from the 500-sheet feederT
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Figure 5-29 500-sheet feeder pickup
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Figure 5-31 Duplex printing control
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3-bin mailbox feed and delivery sys
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Stacker modeWhen configured for sta
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Stapler/stacker feed and delivery s
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Staple modeWhen the print job speci
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Figure 5-36 Stapler unit operation1
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Figure 5-38 Scanner assembly electr
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Figure 5-40 Scan carriage movement1
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ADF pickup jamIf the leading edge o
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Removal and replacement strategyThi
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Screws that are used in the MFPThe
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Print cartridge1 Open the top cover
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Transfer roller1 Remove the print c
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3 Remove the ADF input tray.Figure
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ADF separation pad1 Open the ADF to
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3 If necessary, pull the ADF delive
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Duplex-printing unit1 Slide the dup
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FuserCAUTION The fuser is very hot.
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Tray 1 pickup roller1 Open tray 1.N
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ADF-hinge flap1 Use a small, flat-b
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Formatter cover and formatter1 Slid
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Hard driveWARNING! The MFP contains
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DIMMsWARNING! The MFP contains comp
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Fax accessoryWARNING! The MFP conta
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Top-cover flatbed flange1 Grasp one
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3 Open the top cover, and remove on
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7 Flex the bottom of the cover away
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4 Release three locking tabs along
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Reversing-separation-guide assembly
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3 Unlock the tab on the right-rever
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5 Push up on the swing-arm-locking
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Main fan (FN101) and reversing-unit
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6 Disconnect one connector (callout
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10 Release the three locking tabs o
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4 Disconnect two locking tabs (one
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4 Disconnect the jam-access-cover-s
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3 Unclip the sensor-flag holder fro
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Front-cover support1 Remove the tra
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3 Remove the shaft from the jam-acc
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7 Remove six screws (callout 2) fro
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11 Remove seven screws (callout 5),
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Feed-roller assembly1 Remove the tr
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6 Reinstallation tip: When the feed
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Main motor (M101)1 Remove the dc co
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4 Unwind the connector wire from th
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4 Disconnect the fan connector (J78
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3 Use a small, flat-blade screwdriv
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3 Unhook the lifter-drive-assembly
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7 Remove five screws (callout 5), a
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8 CAUTION: Do not let the pickup ro
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Power-factor-correction (PFC) power
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5 Remove one screw (callout 4), pus
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9 Disconnect three connectors (call
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3 Remove seven screws (callout 2),
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7 Remove two screws (callout 10), r
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11 Reach inside the MFP, lift up on
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3 Release the paper-feed-assembly a
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Paper-size-detection switch (SW102)
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Laser/scanner1 Remove the following
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Output-bin-full sensor1 Remove the
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ADF and scanner componentsThe proce
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Scanner assembly1 Remove the ADF as
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5 Close the top cover. Remove two s
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8 Slide the scanner slightly to the
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4 Remove three screws (callout 2).F
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Optical unit1 Remove the following
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5 Flex the side of the scanner chas
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8 When the FCC cable-guide is reins
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Inverter PCA1 Remove the following
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Scanner home-position sensor1 Remov
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Scanner-controller PCA1 Remove two
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ADF output-bin extension1 Open the
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ADF white mylar-backing1 Open the A
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ADF front cover1 Remove the ADF inp
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ADF left-side cover1 Remove the fol
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ADF jam-access cover and latch1 Rem
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ADF leading-edge and paper-present
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3 Remove two screws (callout 2) fro
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500-sheet-feeder rear cover1 Remove
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500-sheet-feeder front cover1 Remov
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500-sheet-feeder upper-left coverRe
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500-sheet-feeder number-plate assem
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500-sheet-feeder PCA1 Remove the 50
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500-sheet-feeder paper-size switch1
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500-sheet-feeder jam-access-cover-o
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Troubleshooting processWhen the MFP
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Troubleshooting flowchartThis flowc
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Power-on checksThe basic MFP functi
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Control-panel messagesMessages appe
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Table 7-2 Control-panel messages (c
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Accessory lights for the 3-bin mail
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Heartbeat LEDThe heartbeat LED indi
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Table 7-3 Control-panel messages fo
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5 Rotate the paper-release guide to
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4 Insert the optional envelope feed
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5 Rotate the paper-release guide to
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5 Slide the tray into the MFP.6 If
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5 Reinstall the duplexer.6 Reinstal
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5 If you are using a 3-bin mailbox,
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6 If you can see either the leading
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14 Reinstall the duplexer or the du
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Clearing staple jamsOccasionally, s
Page 386 and 387:
Solving repeated jamsSituationSolut
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Jams in the envelope-feeder area an
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Table 7-8 Causes of jams in the out
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Using the paper-path testThe paper-
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Overhead transparency defectsOverhe
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Table 7-11 Defects that can occur d
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Light print (entire page)Begin by p
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DropoutsTable 7-16 DropoutsPossible
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LinesAaBbCcAaBbCcAaBbCcAaBbCcAaBbCc
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Gray backgroundPossible cause1 The
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Repeating defects and repeating ima
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Page skewPossible cause1 The media
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Wrinkles or creasesPossible cause1
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Horizontal white linesPossible caus
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White spots on blackPossible cause1
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Blurred printPossible cause1 The me
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Blank page (ADF)First, verify that
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Vertical lines (ADF)Possible causeS
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Repetitive defect rulerDefects on r
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Media-transport problemsThe followi
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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
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Item Options Values ExplanationSCAN
Page 454 and 455:
Manual sensor testThe manual sensor
Page 456 and 457:
Service menuAuthorized HP service t
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Service IDThis information appears
Page 460 and 461:
Diagrams for troubleshootingUse the
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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
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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
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Figure 7-26 General circuit diagram
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Figure 7-28 Circuit diagram for the
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How to order parts, supplies, and a
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Customer-replaceable parts and acce
Page 492 and 493:
Customer-replaceable components (pr
Page 494 and 495:
Customer-replaceable components (AD
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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-
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Figure 8-10 Print-engine assemblies
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External componentsFigure 8-11 Exte
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Print-engine internal componentsUpp
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Internal components (1 of 5)Figure
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Page 520 and 521:
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Electrical/forward assemblyFigure 8
Page 526 and 527:
Main drive assemblyFigure 8-19 Main
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Paper-pickup-drive assemblyFigure 8
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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
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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
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ADF componentsADF assemblyFigure 8-
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ADF internal components (1 of 3)Fig
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ADF internal components (2 of 3)12F
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ADF internal components (3 of 3)Fig
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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-
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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
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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
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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
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Table 8-59 Alphabetical parts list
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Table 8-60 Numerical parts list (co
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606 8 Parts and diagrams
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sensors, diagrams 448sensors, remov
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electrical specifications 17embedde
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embedded Web server settings405erro
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everse-separation-guideassembly 512
Page 646 and 647:
power specifications 17wake time 69
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firmware updates 75IP address, chan
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HP LaserJet 4345mfp Series Service Manual - ENWW

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