Horizontal Stripes - Brother DCP-9010CN Service Manual

■ Horizontal stripes

<User Check>
Step Cause
1 Dirt on the charged
electrode
2 Bend of tray ground
spring
3 Toner attached on
the develop roller
4 Scratch on the heat
roller
5 HVPS control PCB
failure
- Clean the inside of the machine and the corona wire in the drum unit.
- Replace the drum unit with a new one.
Are the electrodes on
the drum unit and
machine body dirty?
Is the tray ground spring
bent? (Refer to
Fig. 3-10
Are the horizontal
stripes at 31 mm
(develop roller
circumference)
intervals?
Are the horizontal
stripes at 78 mm (heat
roller circumference)
intervals?
Is the problem solved
after replacing the HVPS
control PCB ASSY?
3-72
Check
Result
Yes
Yes
(P3-70))
Yes
Yes
Yes
Remedy
Clean both electrodes.
(Refer to Fig. 3-3
(P3-33) and Fig. 3-6
(P3-34))
Replace the paper tray.
This problem will
disappear by printing
approximate 10 pages.
If the same problem
occurs, replace the
toner cartridge.
Replace the fuser unit.
Replace the HVPS
control PCB ASSY.
Confidential