Brother MFC-9125CN - Page 163

3-71
Confidential
■ Vertical streaks in a light background
<User Check>
- Clean the inside of the machine and the corona wire in the drum unit.
- Clean the LED array with a soft lint-free cloth.
- Replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
■ Vertical streaks in a dark background
<User Check>
- Clean the inside of the machine and the corona wire in the drum unit.
- Clean the LED array with a soft lint-free cloth.
- Replace the toner cartridge with a new one.
Memo:
You can check this image defect with the function code 71.
(Refer to “1.4.21 Color test pattern (Function code 71)” in Chapter 7)
Step Cause Check
Result
Remedy
1 LED ASSY failure Is the problem solved
after replacing the
LED
ASSY
?
Yes Replace the LED ASSY.
Step Cause Check
Result
Remedy
1 LED ASSY failure Is the problem solved
after replacing the
LED
ASSY
?
Yes Replace the LED ASSY.