Brother MFC-7240 - Page 112

2-75
Confidential
 Ghost
 Fogging
<User Check>
- Check the machine's environment. High temperature and high
humidity or low temperature and low humidity conditions can cause
this problem.
- Choose Reduce Ghosting mode in the driver.
- Replace the drum unit with a new one.
Step Cause Remedy
1
High voltage power supply PCB
failure
Replace the high voltage power supply PCB
ASSY.
2 Main PCB failure Replace the main PCB ASSY.
<User Check>
- This problem may disappear after printing approximately 10 pages
of completely blank sheets.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
- Do not use acid paper.
Step Cause Remedy
1
High voltage power supply PCB
failure
Replace the high voltage power supply PCB
ASSY.
2 Main PCB failure Replace the main PCB ASSY.
CAUTION:
• This problem often occurs when the drum unit or toner cartridge is nearly at the end of
life.