Confidential
2-53
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 label data.
2 White reference film stained Clean the white reference film of the document
scanner unit.
3 Second side CIS unit defective Replace the second side CIS unit.
4 White reference film damage,
broken
Replace the document scanner unit.
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 Scanner motor harness connection
failure
Reconnect the scanner motor harness.
3 First side CIS flat cable
connection failure
Reconnect the first side CIS flat cable.
4 Black reference film stained Clean document cover glass at black reference film.
5 First side CIS flat cable defective Replace the first side CIS flat cable.
6 First side CIS unit defective Replace the first side CIS unit.
7 Scanner motor defective Replace the document scanner unit.
8 Main PCB defective Replace the main PCB ASSY.
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