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Confidential
2-48
Error Code AC
Level of second side CIS scan result is detected as abnormal during FAX transmission
(first transmission.)
Error Code AF
CIS positioning abnormal (Home position cannot be found.)
Unable to Scan AC
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 AF
LCD
Step
Cause
Solution
1
Scanner belt out of place
Set the scanner belt into place.
2
Document scanner motor
harness connection failure
Reconnect the document scanner motor
harness.
3
First side CIS flat cable
connection failure
Reconnect the first side CIS flat cable.
4
First side CIS flat cable and
second side CIS flat cable are
connected vice versa.
Reconnect the first side CIS flat cable and the
second side CIS flat cable correctly.
5
Black reference tape stained
Clean document cover glass at black reference
tape.
6
First side CIS flat cable
defective
Replace the first side CIS flat cable.
7
First side CIS unit defective
Replace the first side CIS unit.
8
Document scanner motor
defective
Replace the document scanner unit.
9
Main PCB defective
Replace the main PCB ASSY.
Summary of Contents for MFC-J6920DW
Page 123: ...3 3 Confidential 2 PACKING ...
Page 146: ...3 26 Confidential 3 Set the protective part Protective part ...
Page 308: ...5 37 Confidential pfadj2 Pattern ...
Page 315: ...5 44 Confidential Margin Check Pattern ...
Page 362: ...App 3 8 Confidential When the following screen appears click Close to close the screen ...