Brother DCP-9055CDN Service Manual page 116

■ Error code A4
Cover is Open
Close the ADF Cover, then press the Stop Key.
The ADF cover is open.
<User Check>
- Close the ADF cover.
Step
1 Coming off of document front/
ADF open actuator
2 Harness connection failure of
document front/ADF open
sensor PCB
3 Deformation and/or breakage of
ADF cover
4 ADF cover open sensor failure
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. (First side) (Scanning unit failure for the first time.)
Step
1
Scanning error
■ Error code A6
Scan Unable A6
See Troubleshooting and routine maintenance chapter in User's Guide.
Scanning failure upon FAX transmission. (First side) (Scanning unit failure for the second time
or later.)
Step
1 Document scanner unit failure
(First-side)
2 Main PCB failure
Cause
Cause
Cause
2-78
Remedy
Re-assemble the document front/ADF
open actuator.
Check the harness connection of the
document front/ADF open sensor PCB
open and reconnect it.
Replace the ADF cover ASSY.
Replace the document front/ADF open
sensor PCB ASSY.
Replace the main PCB ASSY.
Remedy
Turn the power switch OFF and ON.
Then, try scanning again.
Remedy
Replace the document scanner unit.
Replace the main PCB ASSY.
Confidential