3-72
Confidential
■ 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.
(Refer to Fig. 3-3
(P3-33) and Fig. 3-6
(P3-34))
2 Bend of tray ground
spring
Is the tray ground spring
bent? (Refer to
Fig. 3-10 (P3-70))
Yes Replace the paper tray.
3 Toner attached on
the develop roller
Are the horizontal
stripes at 31 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 heat
roller
Are the horizontal
stripes at 78 mm (heat
roller circumference)
intervals?
Yes Replace the fuser unit.
5 HVPS control PCB
failure
Is the problem solved
after replacing the HVPS
control PCB ASSY?
Yes Replace the HVPS
control PCB ASSY.
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