W820 (4025-xxx)

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1-16 Service Manual<strong>4025</strong>-XXX
<strong>4025</strong>-XXXPrinter Control ComponentsThe printer control is made up of the MCU PWB, the I/O PWB, and numerous connectedcomponents.Machine Control Unit PWB (MCU PWB)The printer receives status and command information from the I/O PWB and from theESS PWB and controls most printer operations. The MCU PWB performs nine majorfunctions:1. Communicates with the Printer Controller (ESS).2. Maintains the system clock.3. Controls the printing process.4. Controls the Printhead, the Fuser, and the drive assemblies.5. Distributes +5VDC and +24VDC to various printer components.6. Monitors printer status.7. Maintains a running print count.8. Maintains NVRAM settings.9. Controls printer options.The ESS PWB is connected to the MCU PWB. Video data travels from the ESS PWB,through the MCU PWB to the Laser Diode PWB.General Information 1-17
Page 1 and 2: Lexmark TM W8204025-XXX• Table of
Page 3 and 4: 4025-XXXTable of ContentsNotices an
Page 5 and 6: 4025-XXXHow to Follow a Service Che
Page 7 and 8: 4025-XXXTray 2 Lift Motor . . . . .
Page 9 and 10: 4025-XXXNotices and Safety Informat
Page 11 and 12: 4025-XXXLaser NoticesThe printer is
Page 13 and 14: 4025-XXXLasermeddelelsePrinteren er
Page 15 and 16: 4025-XXXsicurezza di alcune parti n
Page 17 and 18: 4025-XXXPrefaceThis manual describe
Page 19 and 20: 4025-XXX1. General InformationOptio
Page 21 and 22: 4025-XXXSymbols Used in this Manual
Page 23 and 24: 4025-XXXCaution LabelsThroughout th
Page 25 and 26: 4025-XXXSchematic Diagram of Printe
Page 27 and 28: 4025-XXXFusingAfter image transfer,
Page 29 and 30: 4025-XXXPower Supply ComponentsThe
Page 31 and 32: 4025-XXX7. PSHV-R2Takes the +24VDC
Page 33: 4025-XXXPrinter ControlPrinter cont
Page 37 and 38: 4025-XXX16. Fuser Exit SensorMonito
Page 39 and 40: 4025-XXXGeneral Information 1-21
Page 41 and 42: 4025-XXX35. Lift Motor 1Raises the
Page 43 and 44: 4025-XXX2. Processing input informa
Page 47 and 48: 4025-XXXMechanical Drive Components
Page 51 and 52: 4025-XXXPaper PathPaper Path is the
Page 53 and 54: 4025-XXXPaper Path ComponentsThe pa
Page 55 and 56: 4025-XXXMechanical Drive for Paper
Page 57 and 58: 4025-XXXMechanical Drive for Paper
Page 59 and 60: 4025-XXXMechanical Drive for the Dr
Page 61 and 62: 4025-XXXMechanical Drive for Exit D
Page 63 and 64: 4025-XXXPaper Path Component Contro
Page 65 and 66: 4025-XXXPrinthead ComponentsThe Pri
Page 67 and 68: 4025-XXXImage ResolutionThe printer
Page 69 and 70: 4025-XXXLaser HazardsLasers generat
Page 71 and 72: 4025-XXXXerographics OverviewXerogr
Page 73 and 74: 4025-XXX9. Cleaning BladeThe Cleani
Page 75 and 76: 4025-XXXThe Printhead also helps to
Page 77 and 78: 4025-XXX4. TransferAs the paper tra
Page 79 and 80: 4025-XXX7. DischargeAt both the sta
Page 81 and 82: 4025-XXX8. FusingImage fusing is th
Page 83 and 84: 4025-XXXMechanical Drive for the Fu
Page 85 and 86:
4025-XXXFuser ControlLogic circuits
Page 87 and 88:
4025-XXXGeneral SpecificationsCateg
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4025-XXXImage Registration and Repr
Page 91 and 92:
4025-XXXGlossary of Terms, Acronyms
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4025-XXXInterlockIOTInterlock switc
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4025-XXXVDCVolts - Direct CurrentW-
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4025-XXX2. Diagnostic InformationSt
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4025-XXXAccessing Additional Debug
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4025-XXXService Error Code Table9xx
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4025-XXXSymptom Service Check Table
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4025-XXXAttendance MessageClose Doo
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4025-XXXService ChecksBefore enteri
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4025-XXXStep Actions and Questions
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4025-XXXError Code 912There is a pr
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4025-XXXError Code 941There is a Li
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4025-XXXError Code 980There is a co
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4025-XXXAttendance MessagesAttendan
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4025-XXXAttendance Message 204There
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4025-XXXAttendance Message - Close
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4025-XXXSkewed ImageThe image is ei
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4025-XXX3. Diagnostic AidsDiagnosti
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4025-XXXTop-level MenuIntermediate
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4025-XXXTop-level MenuBASE SENSOR T
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4025-XXXPrint TestsThe Diagnostic I
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4025-XXXHardware TestsLCD Hardware
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4025-XXXThe following screen is dis
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4025-XXX• Receive Status Interrup
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4025-XXXOnce this screen is display
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4025-XXXFeed All Bins TestThis test
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4025-XXXFinisher TestsStaple TestTh
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4025-XXXBase Sensor TestUse the Bas
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4025-XXXOnce Go is selected, the fo
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4025-XXXDigit a Bit Position Printe
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4025-XXXWhen Select is pressed afte
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4025-XXXClearing the Error LogTo cl
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4025-XXXViewing and Resetting the M
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4025-XXX4. Repair InformationThis c
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4025-XXXRemoval1. Remove the Mailbo
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4025-XXXRemoval1. Unplug the AC Pow
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4025-XXXRemoval1. Open the Front Co
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4025-XXXRear Cover AssemblyRemoval1
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4025-XXXOperator PanelRemoval1. Rem
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4025-XXXTray 1 Lift MotorRemoval1.
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4025-XXXRemoval1. Remove the Rear C
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4025-XXXFeeder, Nudger, and Retard
Page 227 and 228:
4025-XXXTray 1 Take Away Roll Assem
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4025-XXXReplacement1. Reinstall Tra
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4025-XXXWARNING: Take care not to b
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4025-XXXTray 1 Retard AssemblyRemov
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4025-XXXTray 1 & 2 Level SensorsRep
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4025-XXXTray 1 & Tray 2 Paper Size
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4025-XXXTray 1 & 2 No Paper Sensors
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4025-XXXActuator AssemblyRemoval1.
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4025-XXXTray 2 Feed ClutchRemoval1.
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4025-XXXWARNING: Take care not to b
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4025-XXXTray 2 Retard AssemblyRemov
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4025-XXXMP Feeder Tray AssemblyRepa
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4025-XXXMP Feeder Support AssemblyR
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4025-XXXRemoval1. Remove the MP Fee
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4025-XXXLeft Lower Cover Pinch Roll
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4025-XXXLeft Lower Cover Interlock
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4025-XXXRegistration ClutchRemoval1
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4025-XXXRegistration Roll AssemblyR
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4025-XXXPrinthead AssemblyRepair In
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4025-XXXEP CartridgeRepair Informat
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4025-XXXBTR AssemblyRepair Informat
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4025-XXXToner SensorRemoval1. Remov
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4025-XXXFuser AssemblyCAUTION: The
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4025-XXXRemoval1. Remove the Fuser
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4025-XXXOffset/Exit AssemblyRepair
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4025-XXXExit Drive AssemblyRemoval1
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4025-XXXOffset MotorRemoval1. Remov
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4025-XXXRemoval1. Remove the Exit D
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4025-XXXFace Up Exit SensorRemoval1
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4025-XXXMain Drive AssemblyRepair I
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4025-XXXReplacement1. Push all of t
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4025-XXXRemoval1. Remove the Top Co
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4025-XXXRemoval1. Remove the Top Co
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4025-XXXRemoval1. Remove the I/O PW
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4025-XXXI/O PWBRemoval1. Remove the
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4025-XXXRemoval1. If you are able t
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4025-XXXRemoval1. Remove the interf
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4025-XXX220VAC TransformerRemoval1.
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4025-XXX5. Connector LocationsP/J L
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4025-XXXP/J Map & Number Connected
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4025-XXXP/J Map & Number Connected
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4025-XXXP/J Location Map 2Connector
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4025-XXXConnector Locations 5-15
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4025-XXXBD1 AC in↔Noise Filter↔
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4025-XXXSignal NameRLY$FUSERDescrip
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4025-XXXBD5 HVPS↔I/O PWBThe follo
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4025-XXXBD6 Printhead↔MCU PWBThe
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4025-XXXBD7 Main Motor↔Interlocks
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4025-XXXBD8 Tray 1 Feeder↔I/O PWB
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4025-XXXBD10 ESS Fan↔MCU PWBBD10
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4025-XXXBD11 MP Feeder↔I/O PWBThe
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4025-XXXBD13 I/O PWB↔MCU PWB (2 o
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4025-XXX6. Preventative Maintenance
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4025-XXX7. Parts CatalogHow to Use
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4025-XXXAssembly 1: Top Cover Assem
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4025-XXXAssembly 2: Front CoverAsm-
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4025-XXXAssembly 3: Rear, Left, and
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4025-XXXAssembly 4: Tray Unit - Pap
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4025-XXXAssembly 5: Tray InterfaceA
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4025-XXXAssembly 6: Paper Pick UpAs
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4025-XXXAssembly 7: Retard and Take
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4025-XXXAssembly 8: Retard and Take
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4025-XXXAssembly 9: Feed Drive Tran
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4025-XXXAssembly 10: Multi Purpose
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4025-XXXAssembly 11: Tray 1 Frame a
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4025-XXXAssembly 12: Tray 2 Frame a
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4025-XXXAssembly 13: RegistrationAs
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4025-XXXAssembly 14: Left Upper Cov
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4025-XXXAssembly 15: Printhead Asse
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4025-XXXAssembly 16: Xerography and
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4025-XXXAssembly 17: Fuser Assembly
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4025-XXXAssembly 18: Exit Lower Chu
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4025-XXXAssembly 19: Exit Drive Ass
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4025-XXXAssembly 20: Main Drive Ass
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4025-XXXAssembly 21: Fuser Drive As
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4025-XXXAssembly 22: Power UnitAsm-
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4025-XXXAssembly 23: HVPS and I/O P
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4025-XXXAssembly 24: ESS AssemblyAs
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4025-XXXAssembly 25: HarnessAsm-Ind
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4025-XXXAssembly 26: MiscellaneousA
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4025-XXXIndexAAttendance Message Ta
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4025-XXXRRemoval and Replacement Pr
Page 405 and 406:
4025-XXX12G4083 7-4512G4084 7-4512G
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W820 (4025-xxx)

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