Brother MFC-J6520DW - Black Level Value Abnormal at Scanning

Confidential
2-49

Error Code BC
Level of second side CIS scan result is detected as abnormal during FAX transmission
(after re-try.)
 Error Code BD
Black level value abnormal at scanning.
Unable to Scan BC LCD
Step Cause Solution
1 White level data failure Carry out maintenance 55 to obtain white level
data.
2 White reference tape of
document pressure bar of ADF
cover stained
Clean the white reference tape of document
pressure bar of ADF cover.
3 Second side CIS unit defective Replace the second side CIS unit.
4 White reference tape of
document pressure bar of ADF
cover damage, broken
Replace the ADF cover.
5 Main PCB defective Replace the main PCB ASSY.
Unable to Scan BD LCD
Step Cause Solution
1 Black level data failure Carry out maintenance 55 to obtain white level
data.
2 First side or second side CIS
unit defective
Replace the first side or second side CIS unit.
3 Main PCB defective Replace the main PCB ASSY.