Samsung SCX-4200 manual Horizontal Black Bands, Black/White Spot, Description Digital Printer

Page 83

Troubleshooting

6.1.3 Horizontal Black Bands

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

1.Dark or blurry horizontal stripes occur in the printing periodically. (These may occur at regular intervals down the page.)

Check and Cause

 

Solution

 

 

 

1. Bad contacts on the toner cartridge high

1.

Clean all HV terminals on the cartridge and

voltage terminals.

 

 

on the set frame. Ensure all toner or paper

 

 

 

 

dust particles are removed.

2. The rollers in the toner cartridge may be

2.

Clean the right Gear that has relatively

contaminated.

 

 

 

small tooth gap on the OPC.

Charge roller

=

37.8 mm

 

 

Supply roller

=

44.9 mm

 

 

Develop roller =

35.2 mm

 

 

Transfer roller

=

45.3 mm

 

 

 

 

 

3.

If the problem persists replace the toner

 

 

 

 

cartridge.

 

 

 

 

 

6.1.4 Black/White Spot

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

1.Dark or blurry black spots occur periodically in the printing.

2.White spots occur periodically in the printing.

Check and Cause

Solution

 

 

1. If dark or blurry black spots occur periodi-

1. Print several OPC cleaning Mode Prints

cally, the rollers in the Developer may be

and then run the Self-test 2 or 3 times.

contaminated with foreign matte or paper

 

particles.

 

( Charge roller : 37.8 mm interval

 

OPC drum : 75.5 mm interval)

 

2. If faded areas or voids occur in a black

2. 75.5 mm repetition: Examine the surface of

image at intervals of 75.5 mm, or black

the OPC drum and carefully clean with a

spots occur elsewhere, the OPC drum

soft, lint free cloth. If unsuccessful replace

surface is damaged.

the cartridge.

 

37.8mm repetition: Replace the toner car-

 

tridge

3. If a black image is partially broken, the

3. The transfer roller guarantees 50,000

transfer voltage is abnormal or the

sheets printing. If the roller's life is expired,

transfer roller's life has expired.

replace it.

 

Note. Cleaning the inside of the set to

 

remove excess toner particles or paper

 

dust will reduce the occurrence of this

 

problem..

 

 

6-2Service Manual

Samsung Electronics

Page 82 Page 84
Image 83
Page 82 Page 84
Contents Digital Laser MFP Key FeaturesVersion no Contents Troubleshooting Disassembly and ReassemblySchematic Diagram Block diagramExploded Views & Parts List Connection DiagramSafety Warning PrecautionsToxic material Electric Shock and Fire Safety PrecautionsAssembly / Disassembly Precautions Handling PrecautionsDisregarding this warning may cause bodily injury Be careful with the high temperature partWhen you move the printer Ensure the printer is installed safelySuper Capacitor or Lithium Battery Precautions ESD PrecautionsProduct Overview Product SpecificationGeneral Specifications SpecificationsScan Specification Print SpecificationCopy Copy SpecificationPaper Handiling Specification Accessory Items Other SpecificationFront View System OutlineSensor Control Panel Scan Part System LayoutFixing PartFuser Paper Feed MechanismTransfer Ass’y Drive Ass’yScan Image Controller Safety Relevant FactsScanner Unit Pressure rollerLSU Laser Scanner Unit Toner Cartridge CPU Part H/W Structure and DescriptionsIptop Micom controller ConfigurationScan Part Ope PannelAsic Printer SectionCPU Unit Chorus 2 Block DiagramSmps & Hvps Copier PartHvps High Voltage Power Supply Remark Smps Switching Mode Power SupplyPrinting CH1+5V CH2+24V CH3+24VS SystemFuser AC Power Control Architecture S/W Structure and DescriptionsPrint Interface Module Power on Initial Module2 S/W Overview Engine Print Processing Control ModulePaper Type Engine Unit Control ModulePaper Size Elapsed Printing Time Print ModeFunctional Requirements of Fixing Unit Fuser Handling Accumulated Printing Pages3.8Environmental 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 6.2 THV Functional Requirements of Power Save ModeFunctional Requirements of Hvps Control 6.1 MHVDoor Open Functional Requirements of Toner CartridgeFunctional Requirements of OPC Drum Functional Requirements of Fan OperationPaper Jam1 Checking Paper jamOut Bin Tray Full Paper JamOver Heat Error TemperatureOpen Heat Error Low Heat ErrorLSU Error To enter the Engine Test mode Engine Test ModeTo enter the Engine Test Mode DiagnosticPaper Path Paper Tray Clearing Paper JamsPaper Exit Area Manual Feeder Fuser Area or Around the Toner CartridgeClearing the Drum Printing the System Data ListClearing the Memory LCD Status Display by Each Error Consumables and Replacement PartsRoller Defective image Typical defect Periodic Defective ImageDisplay Meaning Suggested solutions Error MessageDirect 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 Drive Assy 13 FanMain PBA Engine Shield AssySmps Crum PCB Transfer Roller Feed Roller Remove the Feed Gear1 Assy, as shown below Pick Up Roller & Solenoid Disassembly and Reassembly Vertical White Line Printing Problems Causes and SolutionsCheck and Cause Solution Vertical Black Lines and BandsDescription Digital Printer Horizontal Black BandsBlack/White Spot Dark Image or a Black Light ImageBackground Uneven DensityGhost Digital Printer Ghost Stains on the FaceBlank Page Print out Stains on BackBlack Copy Copy ProblemsWhite Copy Defective Image Quality Abnormal noise2 JAM Paper Feed problems Causes and SolutionsWrong Print Position 4 JAM 3 JAMPaper rolled in the fuser Multi-FeedingPaper rolled on the OPC Drum LSU Error Printer Faults Causes and SolutionsFuser Error Paper Empty Fuser gear melts due to overheating causing Paper JamCover Open Paper Empty without indicationNo error message when the cover is open Defective motor operation No PowerPrinted Vertical Lines become curved Standard of guarantee for consumable parts Toner Cartridge ServicePrecautions on Safe-keeping of Toner Cartridge Service for the Life of Toner CartridgeSigns 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 How to delete the data in the spool manager Spool ErrorOPE 7Block Diagram 7.1 System Block DiagramExploded 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 9Connection 9.1 SCX-4200 Connection Diagram10.1 Main Board1/7 Schematic DiagramsMain 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 Tweezers Tool for TroubleshootingVacuum Cleaner Spring Hook DriverAcronyms and Abbreviations IPC Select a location for the printer 11.4 A4 ISO 19752 Standard Pattern
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