Brother DCP-7055 Service Manual page 94

■ Error code A4
Cover is Open
Close the ADF Cover.
The ADF cover is open.
<User Check>
• Close the ADF cover.
Step
Coming off of document detection
1
actuator/ADF cover open actuator
Harness connection failure of
2 document detection sensor/ADF
cover open sensor PCB
Deformation and/or breakage of
3
ADF cover
ADF cover open sensor failure
4
5 Main PCB failure
■ Error code A5
Scan Unable A5
Remove the original document. Turn the power off, then on again.
Scanning failure upon FAX transmission. (Scanning unit failure for the first time.)
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
■ Error code A6
Scan Unable A6
See Troubleshooting and routine maintenance chapter in User's Guide.
Scanning failure upon FAX transmission. (Scanning unit failure for the second time or later.)
Step
White level data failure
1
2 Document scanner unit failure
3 Main PCB failure
■ Error code A7
Print Unable A7
Turn the power off and then back on again.
Scanning color parameter file failure.
Cause
Cause
2-57
Remedy
Re-assemble the document detection
actuator/ADF cover open actuator.
Check the harness connection of the
document detection sensor/ADF cover
open sensor PCB and reconnect it.
Replace the ADF cover ASSY.
Replace the document detection sensor/
ADF cover open sensor PCB ASSY.
Replace the main PCB ASSY.
Remedy
Execute the "Acquisition of white level data
(Function code 55)".
Replace the document scanner unit.
Replace the main PCB ASSY.
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