Brother MFC-9130CW Service Manual page 157

■ Completely blank
<User Check>
Step
1 White level calibration data
failure
2 First side or second side CIS
unit failure
3 Main PCB failure
■ Vertical streaks
Step
1 First side or second side CIS
unit failure
■ White vertical streaks
<User Check>
Step
1 First side or second side CIS
unit failure
- Check if the first side and second side of the document are reversed.
Cause
<User Check>
- Clean the ADF glass or document glass.
- Clean the document hold.
Cause
- Clean the ADF glass or document glass.
- Clean the document hold.
Cause
2-118
Remedy
Perform the acquisition of white level data.
(Function code 55)
Replace the first side or second side CIS
unit.
Replace the main PCB ASSY.
Remedy
Replace the first side or second side CIS
unit.
Remedy
Replace the first side or second side CIS
unit.
Confidential