W820 (4025-xxx)

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<strong>4025</strong>-XXXI/O PWB+24VDCSW1 (CRU Interlock)EP CartridgeSW2 (Left Cover Interlock)Left CoverMCU PWB+24VDCFront Cover InterlockFront CoverGround Fault InterrupterMain Power SwitchHOTNGround FaultInterrupter(GFI)Left Front CoverInterlock Switch1-14 Service Manual
<strong>4025</strong>-XXXPrinter ControlPrinter control is a broad term that is used to describe the printer resources that monitorand control the actions and operations of the print engine - from warm-up, through theprint cycle, to machine error detection. The center of printer control for the base engine isthe Machine Control Unit PWB, or MCU PWB. The MCU PWB provides the logic andinformation processing that is necessary for the printer to function. Almost every electricalcomponent within the printer is connected either directly or indirectly to the MCU PWB orto the I/O PWB. The MCU polls the status of sensors in the printer and compares thatinformation to timing tables that are stored in onboard memory. Acting on the results ofthe comparison, the MCU sends commands to various printer components or to the I/OPWB; switching on motors, switching off voltages, signaling statuses. Non-Volatile RAMon the MCU PWB stores adjustable operation parameters, such as fuser temperature andlaser intensity, that are used as reference values during printer operation.General Information 1-15
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: 4025-XXX7. PSHV-R2Takes the +24VDC
Page 35 and 36: 4025-XXXPrinter Control ComponentsT
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
Page 89 and 90:
4025-XXXImage Registration and Repr
Page 91 and 92:
4025-XXXGlossary of Terms, Acronyms
Page 93 and 94:
4025-XXXInterlockIOTInterlock switc
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4025-XXXVDCVolts - Direct CurrentW-
Page 97 and 98:
4025-XXX2. Diagnostic InformationSt
Page 99 and 100:
4025-XXXAccessing Additional Debug
Page 101 and 102:
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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Page 177 and 178:
4025-XXX3. Diagnostic AidsDiagnosti
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4025-XXXTop-level MenuIntermediate
Page 181 and 182:
4025-XXXTop-level MenuBASE SENSOR T
Page 183 and 184:
4025-XXXPrint TestsThe Diagnostic I
Page 185 and 186:
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
Page 195 and 196:
4025-XXXFinisher TestsStaple TestTh
Page 197 and 198:
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
Page 203 and 204:
4025-XXXWhen Select is pressed afte
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4025-XXXClearing the Error LogTo cl
Page 207 and 208:
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
Page 215 and 216:
4025-XXXRemoval1. Open the Front Co
Page 217 and 218:
4025-XXXRear Cover AssemblyRemoval1
Page 219 and 220:
4025-XXXOperator PanelRemoval1. Rem
Page 221 and 222:
4025-XXXTray 1 Lift MotorRemoval1.
Page 223 and 224:
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
Page 229 and 230:
4025-XXXReplacement1. Reinstall Tra
Page 231 and 232:
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
Page 241 and 242:
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
Page 251 and 252:
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
Page 267 and 268:
4025-XXXEP CartridgeRepair Informat
Page 269 and 270:
4025-XXXBTR AssemblyRepair Informat
Page 271 and 272:
4025-XXXToner SensorRemoval1. Remov
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4025-XXXFuser AssemblyCAUTION: The
Page 275 and 276:
4025-XXXRemoval1. Remove the Fuser
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4025-XXXOffset/Exit AssemblyRepair
Page 279 and 280:
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
Page 291 and 292:
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.
Page 307 and 308:
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
Page 329 and 330:
4025-XXXBD6 Printhead↔MCU PWBThe
Page 331 and 332:
4025-XXXBD7 Main Motor↔Interlocks
Page 333 and 334:
4025-XXXBD8 Tray 1 Feeder↔I/O PWB
Page 335 and 336:
4025-XXXBD10 ESS Fan↔MCU PWBBD10
Page 337 and 338:
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
Page 347 and 348:
4025-XXX7. Parts CatalogHow to Use
Page 349 and 350:
4025-XXXAssembly 1: Top Cover Assem
Page 351 and 352:
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
Page 403 and 404:
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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