Samsung ML-1700 specifications Horizontal Black Band, Black/White Spot

Page 67

T RO U B L E S H O OT I N G

7.1.3 Horizontal Black Band

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

1.Dark or blurry horizontal stripes occur in the printing periodically. (They may not occur periodically.)

Check and Cause

 

Solution

 

 

 

1. Bad contacts of the voltage terminals to

1.

Clean each voltage terminal of the Charge,

developer.

 

 

 

Supply, Develop and Transfer roller.

 

 

 

 

(remove the toner particles and paper par-

 

 

 

 

ticles)

2. The rollers of developer may be stained.

2.

Clean the right Gear that has relatively

Charge roller

=

37.7mm

 

small gap of the teeth in the OPC.

Supply roller

=

37mm

 

 

Develop roller =

35.3mm

 

 

Transfer roller

=

45.3mm

 

 

 

 

 

3.

If the malfunction persists, replace the

 

 

 

 

developer.

 

 

 

 

 

7.1.4 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. Run OPC cleaning Mode Print and run the

cally, the rollers in the Developer may be

Self-test 2 or 3 times.

contaminated with foreign matte or paper

 

particles.

 

( Charge roller : 37.7 mm interval

 

OPC drum : 75.5 mm interval)

 

2. If faded areas or voids occur in a black

2. In case of 75.5 mm interval unremovable in

image at intervals of 75.5 mm, or black

1, cleanly remove foreign substances stuck

spots occur elsewhere, the OPC drum

on the OPC location equivalent to black

surface is damaged.

spots and white spots with a dry duster.

3. If a black image is partially broken, the

3. The transfer roller guarantees 60.000

transfer voltage is abnormal or the trans-

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

fer roller's life has expired.

replace it.

 

4. In case of 37.7 mm interval unremovable in

 

1, take measures as to replace the develop-

 

er cartridge and try to print out.

 

5. Clean the inside of the set against the paper

 

particles and foreign matter in order not to

 

cause the trouble.

 

 

Service Manual

7-2

Samsung Electronics

Page 66 Page 68
Image 67
Page 66 Page 68
Contents Block Diagram PrecautionsSpecifications TroubleshootingElectronics 2003 Precautions Precaution related electric shock or fire Precaution related noxious materialPrecaution when assembly/disassembly Precaution related handling the machineESD Precautions DCUDiagnostic Control Unit Driver Tool for TroubleshootingLSU Acronyms and Abbreviations1 A4 5% Pattern Sample Pattern for the Test2 A4 2% Pattern 3 A4 IDC Pattern Samsung Electronics General Specifications SpecificationsElectrical Specification Controller SpecificationEnvironmental Range Toner Cartridge Developer Paper Handling SpecificationsSpecifications Front View Printer ComponentsInside View Rear ViewControl Panel On Line/Error and Toner Save LEDsPrinting demo Cancel buttonFuser System LayoutFixing PartFuser Feeding PartTransfer Ass’y Driver Ass’yLSU Laser Scanner Unit Safety Relevant FactsToner Cartridge Main Pbaspl Model Sensor input circuit Asic JupiterFlash Memory SdramDC FAN / Solenoid Driving Paper Feeding, Toner Cartridge SensingPaper Exit Sensing Cover Open SensingSdram Regulator Clock Generator Buffer Motor Drive Main PBA PCL ModelML-1710 ML-1510 ML-1750 Memory AsicSPGPmAHB BUS SPGPm Internal Block DiagramSmps & Hvps HVPSHigh Voltage Power Supply Length of Power Cord 1830 ± 50mm Power Switch Use SMPSSwitching Mode Power SupplyRated Power Output Consumption PowerFuser AC Power Control Feeding Engine F/WDrive TransferHeat Lamp Method FusingPID Method 5 LSU What is the Q-PID Method?Releasing Plastic Latches General Precautions on DisassemblyWhenever servicing the machine, you must perform as follows Top Cover FuserHeat Lamp Type FuserFuserQ-PID Type Unplug Thermister Harness from the Fuser cover LSU Exit RollerDriver Ass’y FanMain PBA Engine Shield Ass’ySmps Transfer Roller Feed Roller Pick Up Roller & Solenoid DCU Setup How to use DCUCode Error CodeNormal Code Code Description Self Diagnostic Mode13 THV+ TRIGGER. ALL HV Functi on Enter Up/ Dow n Stop Remar k Self Test ButtonPaper OutFace Up Paper PathPaper Exit Area JAM2 Clearing Paper JamsAround the Toner Cartridge JAM1 Paper Feed Area JAM0Tips for Avoiding Paper Jams Printing a Demo Sample PatternPrinting a cleaning sheet LED Status Display by Each Error Consumables and Replacement PartsRoller Defective image Typical defect Periodic Defective ImageSamsung Electronics Vertical Black Line and Band Bad imageVertical White Line Black/White Spot Horizontal Black BandDark Image or a Black Light ImageBackground Uneven DensityGhost Satins on the Face Blank Page Print out Satins on BackWrong Print Position Bad discharge2 JAM 4 JAM 3 JAMPaper rolled in the Fuser Multi-FeedingPaper rolled in the Toner Cartridge OPC Drum All LEDs blinking Scan Error All LEDs blinking Fuser ErrorMalfunction Paper Empty Not function of the gear of the fuser due to melting awayPaper Empty without indication Cover Open No lamp on when the cover is openDefective motor operation No PowerVertical Line Getting Curved Redistributing Toner Toner Cartridge ServicePrecautions on Safe-keeping of Toner Cartridge Service for the Life of Toner CartridgeImage Signs and Measures at Poor toner cartridgeFault Signs Cause & Check Solution White Black spot Printer is not working Bad Environment of The SoftwareUtilities program Abnormal Printing How to delete the data in the spool manager Spool ErrorExploded Views and Parts List 11-1 11-2 11-3 Main Assembly Parts List Unit Assembly Frame Unit Assembly Parts List Frame Unit Assembly Parts ListCont Drive Unit Assembly Parts List Drive Unit AssemblyCassette Unit Assembly Cassette Unit Assembly Parts List Fuser Unit Assembly Fuser Unit Assembly Parts List Samsung Electronics 9Block Diagram 9.1 PCL Model Motor DR PART’S SPL ModelPCL Model Connection DiagramComputer PCL Main Circuit Diagram 1/7 Schematic DiagramsPCL Main Circuit Diagram 2/7 PCL Main Circuit Diagram 3/7 PCL Main Circuit Diagram 4/7 PCL Main Circuit Diagram 5/7 PCL Main Circuit Diagram 6/7 PCL Main Circuit Diagram 7/7 SPL Main Circuit Diagram 1/5 SPL Main Circuit Diagram 2/5 SPL Main Circuit Diagram 3/5 SPL Main Circuit Diagram 4/5 SPL Main Circuit Diagram 5/5 THV Hvps Circuit Diagram 1/24KV Hvps Circuit Diagram 2/2Smps Circuit Diagram 110V 1/2 CON2-14MANUAL CON2-25EXIT Smps Circuit Diagram 110V 2/2
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