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Cause and Check Point Solution
Bad contacts from OPC drum and/or toner cartridge to
ground.
Check the terminal for the Ground-OPC.
The LSU is not working Check the connecter for the LSU
The developing bias voltage on HVPS is not working.
Check the HVPS B’d and replace it.
Note: Ensure your meter is capable of reading the
voltages you are trying to check.
Description
Blank page is printed.
Uneven Density
Cause and Check Point Solution
The pressure force on the front to rear springs of the
transfer roller is not even, the springs are damaged,
the transfer roller is improperly installed
Replace the PTB Unit
The toner layer is not even across the developing roller
due to the damaged doctor blade or low toner level.
Replace the toner cartridge
The toner cartridge.tension springs are weakened. Replace the toner cartridge
The life of the Toner Cartridge has expired. Replace the toner cartridge
Description
Print Density is uneven between front to rear.
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