Samsung SLM2830DW

4. Black and White spot

• Description : Dark or blurry black spots occur periodically in the printing.

Probable Cause	Solution
If dark or blurry black spots occur periodically, the rollers in the Imaging unit may be contaminated with foreign matte or paper particles. • OPC Drum = 75.4 mm • Charge Roller = 26.7 mm • Developing Roller = 36.75 mm	Clean each voltage terminal of the Charge, Developing roller and Transfer roller. (remove the toner particles and paper particles)
If faded areas or voids occur in a black image at intervals of 76 mm, the OPC drum surface is damaged.	Replace the laser toner cartridge or imaging unit.
If a black image is partially broken, the transfer voltage is abnormal or the transfer roller’s life has expired.	• If the transfer roller’s life is expired, replace it. • Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble

5. Light image

• Description : The printed image is light, with no ghost.

Probable Cause	Solution
Toner cartridge life is expired.	Replace the toner cartridge.
HVPS terminal is contaminated.	Clean the contaminated terminal.
The output from the HVPS is abnormal.	Replace the HVPS board.

6. Dark or Black page

• Description : The printed image is dark or black.

Probable Cause	Solution
Check if the high voltage terminal is contaminated.	Clean the high voltage terminal.
The charging roller is defective.	Replace the laser toner cartridge or imaging unit.
The output from the HVPS is abnormal.	Replace the HVPS board.