Brother DCP-7030, Service Manual

Page: 49 / 315

1-31
Confidential
<Location of the laser beam window>
Fig. 1-6
■
Faulty registration
■
Dark
User Check
• Check that the appropriate media type is selected in the
printer driver.
Step Cause Check Result Remedy
1
Registration rear
actuator catching
in some position Does the registration
rear actuator move
smoothly?
No
Re-assemble the
registration rear actuator
and ensure smooth
operation.
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.
Step Cause Check Result Remedy
1
The developing
bias voltage
failure Is the problem solved
after resetting the
developing bias
counter?
Yes
Reset the developing bias
counter. (Refer to
"2.2
Resetting the developing
bias voltage counter"
in
Chapter 5)
2
HVPS PCB
failure Is the problem solved
after replacing the
HVPS PCB ASSY?
Yes
Replace the HVPS PCB
ASSY.
3
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.