Faulty Registration - Brother DCP-7030 Service Manual

<Location of the laser beam window>

■ Faulty registration

Step Cause
Registration rear
actuator catching
1
in some position
■ Dark
Step Cause
The developing
bias voltage
1 failure
HVPS PCB
2 failure
Main PCB failure Is the problem solved
3
Fig. 1-6
User Check
• Check that the appropriate media type is selected in the
printer driver.
Check
Does the registration
rear actuator move
smoothly?
User Check
• Check the machine's environment. High temperature and high
humidity conditions can cause this problem.
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
Check
Is the problem solved
after resetting the
developing bias
counter?
Is the problem solved
after replacing the
HVPS PCB ASSY?
after replacing the main
PCB ASSY?
1-31
Result Remedy
Re-assemble the
registration rear actuator
No
and ensure smooth
operation.
Result Remedy
Reset the developing bias
counter. (Refer to
Yes Resetting the developing
bias voltage counter"
Chapter 5)
Replace the HVPS PCB
Yes ASSY.
Replace the main PCB
Yes ASSY.
"2.2
in
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