Brother HL 1240 - B/W Laser Printer Service Manual page 149

I-22 Light rain
Possible cause Step
Drum unit failure 1
High-voltage 2
power supply
PCB failure
I-23 Ghost
(1) Check the paper used meets the recommended paper specifications. Damp
paper, thick media or rough surfaced paper can cause the problem.
(2) Check the printer's environment. High temperature and high humidity conditions
can cause the problem.
(3) Check that the appropriate media type is selected in the printer driver.
(4) Try installing a new drum unit.
Possible cause Step
Driver setting 1
Drum unit failure 2
High-voltage 3
power supply
PCB failure
Check
Is the problem solved after
replacing the drum unit?
Is the problem solved after
replacing the high-voltage
power supply PCB?
User Check
Check
Is thin paper such as 64g/m
used under the thick paper
mode?
Is the problem solved after
replacing the drum unit?
Is the problem solved after
replacing the high-voltage
power supply PCB?
Result
Yes
Yes
Result
2
Yes
Yes
Yes
6-39
CHAPTER 6 TROUBLESHOOTING
Remedy
Replace the drum unit.
Replace the high-voltage power
supply PCB.
Remedy
1) Change the current mode to
the normal mode from the
driver setting.
2) Print 5 or 6 blank pages if this
problem occurs.
Replace the drum unit.
Replace the high-voltage power
supply PCB.