Printing Problems Causes and Solutions | Samsung SCX-4200 specification

Troubleshooting

66. Troubleshooting

6.1 Printing Problems – Causes and Solutions

6.1.1 Vertical Black Lines and Bands

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

1.Straight thin black vertical lines occur in the printing.

2.Dark black vertical bands occur in the printing.

	Check and Cause		Solution

1.	Damaged developer roller, deformed	1.	Replace the toner cartridge and test
	Doctor-blade in the Toner cartridge.		again.
2.	Scratched surface of the charge roller in	2.	Replace the toner cartridge and test
	the toner cartridge.		again.

6.1.2 Vertical White Line

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

White vertical voids in the image.

	Check and Cause		Solution

1.	1. Contamination of the window or	1.	Clean the LSU window with recommended
	internal lenses of LSU mirror.		cleaner (IPA) Clean the window with a
			clean cotton swab. If dirt is inside the LSU
			– replace LSU.
2.	Foreign object inside the toner cartridge	2.	Replace the toner cartridge.
	or low toner.
3.	Foreign object, contamination or burr on	3.	Clean the exposure window.
	the edge of the toner cartridge window.
4.	If the fuser is defective, voids occur	4.	Open the front cover and check the ribs
	periodically at the top of a black image.		that correspond to the position of the
			voids. Remove if found.
5.	Contamination of the OPC drum.	5.	If the problems are not solved, replace
			the toner cartridge.

	Service Manual	6-1
Samsung Electronics		6-1
Samsung Electronics

Image 82

Samsung SCX-4200 Printing Problems Causes and Solutions, Vertical Black Lines and Bands, Vertical White Line, Description

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 Size Engine Unit Control ModulePaper Type Accumulated Printing Pages Print ModeFunctional Requirements of Fixing Unit Fuser Handling Elapsed Printing Time Temperature 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 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 Memory Printing the System Data ListClearing the Drum 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 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 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 Black/White Spot Horizontal Black BandsDescription Digital Printer 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 White Copy Copy ProblemsBlack Copy Abnormal noise Defective Image Quality Wrong Print Position Paper Feed problems Causes and Solutions2 JAM 3 JAM 4 JAM Multi-Feeding Paper rolled in the fuser Paper rolled on the OPC Drum Fuser Error Printer Faults Causes and SolutionsLSU 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 Printer is not working Software Problems Causes and SolutionsAbnormal Printing 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