Samsung SCX-4200 Series Service Manual

Also see for SCX-4200 Series: Specifications Manual Del Usuario User manual User guide Service manual

Contents

Samsung ElectronicsService ManualTroubleshooting6-26.1.3 Horizontal Black Bands• Description 1. Dark or blurry horizontal stripes occur in the printing periodically.(These may occur at regular intervals down the page.)Digital PrinterDigital PrinterDigital PrinterDigital PrinterDigital PrinterCheck and Cause Solution1. Bad contacts on the toner cartridge highvoltage terminals.2. The rollers in the toner cartridge may becontaminated.Charge roller = 37.8 mmSupply roller = 44.9 mmDevelop roller = 35.2 mmTransfer roller = 45.3 mm1. Clean all HV terminals on the cartridge andon the set frame. Ensure all toner or paperdust particles are removed.2. Clean the right Gear that has relativelysmall tooth gap on the OPC.3. If the problem persists replace the tonercartridge.6.1.4 Black/White Spot• Description 1. Dark or blurry black spots occur periodically in the printing.2. White spots occur periodically in the printing.Digital PrinterDigital PrinterDigital PrinterDigital PrinterDigital PrinterCheck and Cause Solution1. If dark or blurry black spots occur periodi-cally, the rollers in the Developer may becontaminated with foreign matte or paperparticles.( Charge roller : 37.8 mm intervalOPC drum : 75.5 mm interval)2. If faded areas or voids occur in a blackimage at intervals of 75.5 mm, or blackspots occur elsewhere, the OPC drumsurface is damaged.3. If a black image is partially broken, thetransfer voltage is abnormal or thetransfer roller's life has expired.1. Print several OPC cleaning Mode Printsand then run the Self-test 2 or 3 times.2. 75.5 mm repetition: Examine the surface ofthe OPC drum and carefully clean with asoft, lint free cloth. If unsuccessful replacethe cartridge.37.8mm repetition: Replace the toner car-tridge3. The transfer roller guarantees 50,000sheets printing. If the roller's life is expired,replace it.Note. Cleaning the inside of the set toremove excess toner particles or paperdust will reduce the occurrence of thisproblem..