Brother MFC-7450

1-44
Confidential
6.3 Print of the scanning document is light or dark
6.4 Vertical streaks (White or Black vertical streaks)
6.5 Poor fixing
6.6 Image distortion
User Check
• Check if the ADF or FB glass is not stained.
Step Cause Check
Result Remedy
1
Setting of white
level scanning
area malfunction
Is the problem solved
after setting the white
level of scanning?
Ye s
Set the white level
scanning area. (Function
code 55)
2
FB unit failure Is the problem solved by
replacing the FB unit?
Ye s
Replace the FB unit.
3
Main PCB failure Is the problem solved
after replacing the main
PCB ASSY?
Ye s
Replace the main PCB
ASSY.
User Check
• Check if the ADF or FB glass is not stained.
Step Cause Check
Result Remedy
1
Setting of white
level scanning
area malfunction
Is the problem solved
after setting the white
level of scanning?
Ye s
Set the white level
scanning area. (Function
code 55)
2
FB unit failure Is the problem solved by
replacing the FB unit?
Ye s
Replace the FB unit.
User Check
• Check if the ADF or FB glass is not stained.
Step Cause Check
Result Remedy
1
FB unit failure Is the problem solved by
replacing the FB unit?
Ye s
Replace the FB unit.
Step Cause Check
Result Remedy
1
FB unit failure Is the problem solved by
replacing the FB unit?
Ye s
Replace the FB unit.