Confidential
1-51
Vertical streaks in a light background
User Check
- Clean the inside of the machine and the corona wire in the drum unit.
- Replace the toner cartridge with a new one.
Step Cause
Check Result Remedy
1 Drum unit failure Is the problem solved after
replacing the drum unit?
Yes Replace the drum unit.
Horizontal stripes
User Check
- Clean the inside of the machine and the corona wire in the drum unit.
- Replace the drum unit with a new one.
Step Cause
Check Result Remedy
1 Dirt on the
charged electrode
Are the electrodes on the
drum unit and machine
body dirty?
Yes Clean both electrodes
2 Paper tray ground
terminal provided
in the machine
body
Is the paper tray ground
terminal bent, which is
provided in the machine
body? (Refer to Fig. 1-4.)
Yes Correct bending of paper
tray ground terminal.
3 Toner attached on
the develop roller
Are the horizontal stripes
at 37.4 mm (develop roller
circumference) intervals?
Yes This problem will disappear
by printing approximate 10
pages. If the same problem
occurs, replace the toner
cartridge.
4 Scratch on the
exposure drum
Are the horizontal stripes at
75.0 mm (exposure drum
circumference) intervals?
Yes Replace the drum unit.
5 Scratch on the
heat roller
Are the horizontal stripes
at 78.5mm (heat roller
circumference) intervals?
Yes Replace the fuser unit.
6 Transfer HVPS
PCB failure
Is the problem solved after
replacing the transfer
HVPS PCB ASSY?
Yes Replace the transfer
HVPS PCB ASSY.
7 Charge HVPS
PCB failure
Is the problem solved after
replacing the charge
HVPS PCB ASSY?
Yes Replace the charge
HVPS PCB ASSY.
Fig. 1-4
Paper tray ground terminal
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