Samsung SCX-4200 manual Disassembly and Reassembly, Troubleshooting

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5.Disassembly and Reassembly

5.1General Precautions on Disassembly 5-1

5.2Front Cover 5-2

5.3Rear Cover 5-3

5.4DC Fan5-4

5.5Right Side Cover5-5

5.6Left Side Cover 5-6

5.7Scanner Unit 5-7

5.8OPE Unit 5-10

5.9Middle Cover Unit 5-11

5.10Fuser 5-12

5.11Exit Roller5-14

5.12LSU 5-15

5.13Fan 5-16

5.14Drive Ass'y 5-16

5.15 Engine Shield Ass'y

5-17

5.16Main PBA 5-17

5.17SMPS 5-18

5.18CRUM PCB5-19

5.19Transfer Roller5-20

5.20Feed Roller 5-21

5.21Pick Up Roller & Solenoid 5-23

6.Troubleshooting

6.1	Procedure of Checking the Symptoms	6-1
6.2	Solution of Image Problem	6-5

6.3Paper Feeding Problems and Troubleshooting6-10

6.4Symptoms of Bad Operation and Troubleshooting 6-13

6.5Treatment of Error Message 6-17

Image 4

Contents Key Features Digital Laser MFPVersion no Contents Disassembly and Reassembly TroubleshootingBlock diagram Exploded Views & Parts ListConnection Diagram Schematic DiagramPrecautions Safety WarningElectric Shock and Fire Safety Precautions Toxic materialHandling Precautions Assembly / Disassembly PrecautionsBe careful with the high temperature part When you move the printerEnsure the printer is installed safely Disregarding this warning may cause bodily injuryESD Precautions Super Capacitor or Lithium Battery PrecautionsProduct Specification Product OverviewSpecifications General SpecificationsPrint Specification Scan SpecificationCopy Specification CopyPaper Handiling Specification Other Specification Accessory ItemsSystem Outline Front ViewSensor Control Panel System Layout Scan PartPaper Feed Mechanism Transfer Ass’yDrive Ass’y Fixing PartFuserSafety Relevant Facts Scanner UnitPressure roller Scan Image ControllerLSU Laser Scanner Unit Toner Cartridge H/W Structure and Descriptions CPU PartIptop Configuration Scan PartOpe Pannel Micom controllerPrinter Section AsicChorus 2 Block Diagram CPU UnitCopier Part Smps & HvpsHvps High Voltage Power Supply Smps Switching Mode Power Supply RemarkCH1+5V CH2+24V CH3+24VS System PrintingFuser AC Power Control S/W Structure and Descriptions ArchitecturePower on Initial Module 2 S/W OverviewEngine Print Processing Control Module Print Interface ModulePaper Size Engine Unit Control ModulePaper Type Print Mode Functional Requirements of Fixing Unit Fuser HandlingAccumulated Printing Pages Elapsed Printing TimeTemperature in the Warm-Up mode 3.6Temperature in the Stand-By mode3.8Environmental Index LSU Ready Check Functional Requirements for LSU ControlSequence of LSU module Functional Requirements of Environment Recognition Air Temperature Sensor Environment RecognitionTransfer Roller Functional Requirements of Power Save Mode Functional Requirements of Hvps Control6.1 MHV 6.2 THVFunctional Requirements of Toner Cartridge Functional Requirements of OPC DrumFunctional Requirements of Fan Operation Door OpenChecking Paper jam Out Bin Tray FullPaper Jam Paper Jam1Temperature Open Heat ErrorLow Heat Error Over Heat ErrorLSU Error Engine Test Mode To enter the Engine Test ModeDiagnostic To enter the Engine Test modePaper Path Clearing Paper Jams Paper TrayPaper Exit Area Fuser Area or Around the Toner Cartridge Manual FeederClearing the Memory Printing the System Data ListClearing the Drum Consumables and Replacement Parts LCD Status Display by Each ErrorPeriodic Defective Image Roller Defective image Typical defectError Message Display Meaning Suggested solutionsDirect KEY ڌډڞڪګڴٻڟڤڭڠڞگٻڦڠڴ Releasing Plastic Latches General Precautions on DisassemblyWhenever servicing the machine, you must perform as follows Front Cover Rear Cove DC Fan Right Side Cover Left Side Cover Scanner Unit Remove the two screws securing the Scan Upper Unit Scan Motor Assy OPE Unit Middle Cover Unit Fuser Unwrap the Thermistor Harness, as shown below Exit Roller 12 LSU 13 Fan Drive AssyEngine Shield Assy Main PBASmps Crum PCB Transfer Roller Feed Roller Remove the Feed Gear1 Assy, as shown below Pick Up Roller & Solenoid Disassembly and Reassembly Printing Problems Causes and Solutions Check and Cause SolutionVertical Black Lines and Bands Vertical White LineBlack/White Spot Horizontal Black BandsDescription Digital Printer Light Image Dark Image or a BlackUneven Density BackgroundGhost Stains on the Face Digital Printer GhostStains on Back Blank Page Print outWhite Copy Copy ProblemsBlack Copy Abnormal noise Defective Image QualityWrong Print Position Paper Feed problems Causes and Solutions2 JAM 3 JAM 4 JAMMulti-Feeding Paper rolled in the fuserPaper rolled on the OPC Drum Fuser Error Printer Faults Causes and SolutionsLSU Error Fuser gear melts due to overheating causing Paper Jam Paper EmptyPaper Empty without indication Cover OpenNo error message when the cover is open No Power Defective motor operationPrinted Vertical Lines become curved Toner Cartridge Service Precautions on Safe-keeping of Toner CartridgeService for the Life of Toner Cartridge Standard of guarantee for consumable partsSigns and Measures of Poor toner cartridge Fault Signs Cause & Check Solution Fault Signs Cause & Check Solution Ghost & Image Printer is not working Software Problems Causes and SolutionsAbnormal Printing Spool Error How to delete the data in the spool manager7Block Diagram 7.1 System Block Diagram OPEExploded Views and Parts List SCX-4200/XAX Main Exploded View Housing Base Exploded View 24 22 Fuser Unit Exploded View Drive Assembly Exploded View Scan Assembly Exploded View OPE Assembly Exploded View Cassette Assembly Exploded View Service Parts ListModel SCX-4200/XAX HOUSING-M-TERMINAL R2SCX-4920N,ABSNH-1 ROLLER-M-EXIT F/UPML-1710,PCGE EXL-911 SCREW-TAPTITEPWH,+,B,M3,L10,NI PLT,SWRC LABELP-NOMBOXCOMMON,XAX,ART,100G,0 CBF HARNESS-PTLML-1710,CBF,UL 1061,2P,2 LCD-DISPLAYXEVVHX1620BHRC9,SCX-5312F Diagram 9Connection 9.1 SCX-4200 ConnectionSchematic Diagrams 10.1 Main Board1/7Main Board2/7 Main Board3/7 Main Board4/7 Main Board5/7 Main Board6/7 Main Board7/7 OPE Circuit Diagram SMPS-110V1/4 SMPS-110V2/4 SMPS-110V3/4 SMPS-110V4/4 SMPS-220V1/4 SMPS-220V2/4 SMPS-220V3/4 SMPS-220V4/4 Tool for Troubleshooting Vacuum Cleaner Spring HookDriver TweezersAcronyms and Abbreviations IPC Select a location for the printer 11.4 A4 ISO 19752 Standard Pattern

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