TroubleshootingService Manual 7-11Samsung Electronics7.3.5 Light Image• Description The printed image is light, with no ghost.Digital PrinterDigital PrinterDigital PrinterDigital PrinterDigital PrinterCheck and Cause Solution1. Toner Save mode enabled2. Develop roller is contaminated or thetoner cartridge is almost empty.3. Ambient temperature is below than 10°C.4. Bad contact caused by dirty terminals onthe toner cartridge or set.5. Abnormal output from the HVPS.(Run EDC mode – see sections 6.5.1and 6.5.3)1. Ensure the Toner Save mode is off. Checkset and driver settings.2. Replace the toner cartridge and try to printout again.3. Wait 30 minutes after printer is powered onbefore you start printing.4. Clean the cartridge and set contacts.Generally clean dirt from inside the set.5. Replace the HVPS if the problems are notsolved by the above four instructions.7.3.6 Dark Image or a Black• Description The printed image is dark.Digital PrinterDigital PrinterDigital PrinterDigital PrinterDigital PrinterCheck and Cause Solution1. No charge voltage in the engine board.2. Charge voltage fault due to bad contactbetween toner cartridge and set contacts.3. VD0 signal of the Main PBA is Low state.1. Check the state of the connector whichconnects the engine board and HVPS.2. Clean the high voltage charge terminals.Note if 1 and 2 do not resolve the problemand the problem persists replace theHVPS.3. Replace the LSU Unit or Main PBA.
