Samsung SCX-4200 Printer Manual: 7g-8-4 Temperature Sending Unit Disassembly

Disassembly and Reassembly

5.15 Engine Shield Ass'y

1.Before you remove the Engine Shield Ass'y, you should remove:

-Scanner Unit (Refer to 5.7)

-Fuser Connectors (Refer to 5.10.2)

2.Remove the eleven screws securing the Engine Shield Ass'y and unplug the all connectors. Then remove the Engine Shield Ass'y.

hield Ass'y

5.16 Main PBA

1.Before you remove the Main PBA, you should remove:

-Engine Shield Ass'y (Refer to 5.15)

2.Unplug the Engine Harness and remove the two screws from the Main PBA. Then lift the Main PBA out, as shown below.

Main PBA

Engin

Harness

Service Manual 5-17

Samsung Electronics

Image 74

Samsung SCX-4200 manual Engine Shield Assy, Main PBA

Contents

Key Features Digital Laser MFP Version no Contents Disassembly and Reassembly Troubleshooting Connection Diagram Block diagramExploded Views & Parts List Schematic Diagram Precautions Safety Warning Electric Shock and Fire Safety Precautions Toxic material Handling Precautions Assembly / Disassembly Precautions Ensure the printer is installed safely Be careful with the high temperature partWhen you move the printer Disregarding this warning may cause bodily injury ESD Precautions Super Capacitor or Lithium Battery Precautions Product Specification Product Overview Specifications General Specifications Print Specification Scan Specification Copy Specification Copy Paper Handiling Specification Other Specification Accessory Items System Outline Front View Sensor Control Panel System Layout Scan Part Drive Ass’y Paper Feed MechanismTransfer Ass’y Fixing PartFuser Pressure roller Safety Relevant FactsScanner Unit Scan Image Controller LSU Laser Scanner Unit Toner Cartridge H/W Structure and Descriptions CPU Part Iptop Ope Pannel ConfigurationScan Part Micom controller Printer Section Asic Chorus 2 Block Diagram CPU Unit Copier Part Smps & Hvps Hvps High Voltage Power Supply Smps Switching Mode Power Supply Remark CH1+5V CH2+24V CH3+24VS System Printing Fuser AC Power Control S/W Structure and Descriptions Architecture Engine Print Processing Control Module Power on Initial Module2 S/W Overview Print Interface Module Paper Type Engine Unit Control ModulePaper Size Accumulated Printing Pages Print ModeFunctional Requirements of Fixing Unit Fuser Handling Elapsed Printing Time 3.8Environmental Index 3.6Temperature in the Stand-By modeTemperature in the Warm-Up mode Sequence of LSU module Functional Requirements for LSU ControlLSU Ready Check Transfer Roller Air Temperature Sensor Environment RecognitionFunctional Requirements of Environment Recognition 6.1 MHV Functional Requirements of Power Save ModeFunctional Requirements of Hvps Control 6.2 THV Functional Requirements of Fan Operation Functional Requirements of Toner CartridgeFunctional Requirements of OPC Drum Door Open Paper Jam Checking Paper jamOut Bin Tray Full Paper Jam1 Low Heat Error TemperatureOpen Heat Error Over Heat Error LSU Error Diagnostic Engine Test ModeTo enter the Engine Test Mode To enter the Engine Test mode Paper Path Clearing Paper Jams Paper Tray Paper Exit Area Fuser Area or Around the Toner Cartridge Manual Feeder Clearing the Drum Printing the System Data ListClearing the Memory Consumables and Replacement Parts LCD Status Display by Each Error Periodic Defective Image Roller Defective image Typical defect Error Message Display Meaning Suggested solutions Direct KEY ڌډڞڪګڴٻڟڤڭڠڞگٻڦڠڴ Whenever servicing the machine, you must perform as follows General Precautions on DisassemblyReleasing Plastic Latches 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 Assy Engine Shield Assy Main PBA Smps Crum PCB Transfer Roller Feed Roller Remove the Feed Gear1 Assy, as shown below Pick Up Roller & Solenoid Disassembly and Reassembly Vertical Black Lines and Bands Printing Problems Causes and SolutionsCheck and Cause Solution Vertical White Line Description Digital Printer Horizontal Black BandsBlack/White Spot Light Image Dark Image or a Black Uneven Density Background Ghost Stains on the Face Digital Printer Ghost Stains on Back Blank Page Print out Black Copy Copy ProblemsWhite Copy Abnormal noise Defective Image Quality 2 JAM Paper Feed problems Causes and SolutionsWrong Print Position 3 JAM 4 JAM Multi-Feeding Paper rolled in the fuser Paper rolled on the OPC Drum LSU Error Printer Faults Causes and SolutionsFuser Error Fuser gear melts due to overheating causing Paper Jam Paper Empty Paper Empty without indication Cover Open No error message when the cover is open No Power Defective motor operation Printed Vertical Lines become curved Service for the Life of Toner Cartridge Toner Cartridge ServicePrecautions on Safe-keeping of Toner Cartridge Standard of guarantee for consumable parts Signs and Measures of Poor toner cartridge Fault Signs Cause & Check Solution Fault Signs Cause & Check Solution Ghost & Image Abnormal Printing Software Problems Causes and SolutionsPrinter is not working Spool Error How to delete the data in the spool manager 7Block Diagram 7.1 System Block Diagram OPE Exploded 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 Connection Schematic Diagrams 10.1 Main Board1/7 Main 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 Driver Tool for TroubleshootingVacuum Cleaner Spring Hook Tweezers Acronyms and Abbreviations IPC Select a location for the printer 11.4 A4 ISO 19752 Standard Pattern