Samsung SCX-6545N Service Manual page 243

Error
[Description]
[Wrong Part]
[Check and Cause]
[Solution]
Error
[Description]
[Wrong Part]
[Check and Cause]
[Solution]
Error
[Description]
[Wrong Part]
[Check and Cause]
[Solution]
Service Manual
Alignment & Troubleshooting
Dark Image or black
The printed image is dark.
1. HVPS
1. No charge voltage in the HVPS board.
2. Charge voltage is not turned on due to the bad contacts between power supply
in the side of the drum cartridge and charge terminal of HVPS.
1. Clean the high voltage charge terminal.
2. Check the state of the connector which connects the engine board and HVPS.
3. Replace the HVPS if not solved by the above direction 1 and 2.
Background
Light dark background appears in whole area of the printing.
1. HVPS
2. Low Q/M of developer (High T/C of developer)
1. Does recycle paper be used?
2. Has the life of the developer(carrier+toner) ended?
3. Is the HVPS normal?
1. The Drum cartridge is basically designed to print 60K sheets with simplex
mode. If it prints more than 60K sheets, (around 50K sheets) a background can
be occurred.
2. The drum cartridge is not guaranteed if using recycle paper.
3. Replace the drum cartridge when the life of it has been ended.
4. Clean the bushing part of the transfer roller.
5. If the problem is still not solved, replace the drum cartridge.
Toner Supply Error
The poor supply of toner in the printing.
1. Toner feed roller
2. Toner supply DC motor
1. The state of rotation of toner feed roller
2. Is the toner supply motor normal?
1. Replace the toner cartridge.
2. Replace the toner supply motor.
4-119
Samsung Electronics