Image Defect Troubleshooting (Defect of the Print)
SM 6-51 M085/M086
Trouble –
shooting
6 Image distortion
Possible cause and Remedy
1. Laser unit not assembled correctly
Is the laser unit assembled into the machine securely? (Check if there is no gap.)
No: Assemble the laser unit correctly and secure the screw.
2. Incorrect radiation angle of scanner diode of laser unit.
Scanner motor rotation failure
Is the problem solved after replacing the laser unit?
Yes: Replace the laser unit.
3. Main PCB failure
Is the problem solved after replacing the main PCB ASSY?
Yes: Replace the main PCB ASSY.
7 All black
Possible cause and Remedy
1. Corona wire failure
Are the electrodes on the drum unit and machine body dirty?
Yes: Clean both electrodes. ( p.6-21 "Electrodes location on the drum unit" and
p.6-21 "Electrodes location on the machine")
2. Corona wire failure
Is the corona wire damaged?
Yes: Replace the drum unit.
3. Under FG wire not assembled correctly
Is the under FG wire connected securely?
No: Re-assemble the under FG wire.
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