Brother 09055CDN Service Manual page 117

■ Error code A3
(Non Touch panel model)
Document Jam
Clear the scanner jam, then press the Stop Key.
(Touch panel model)
Animation is displayed.
The document first side rear sensor does not detect the leading edge of a document although
the document is fed farther than a designated distance.
<User Check>
- Check if the document is jammed in the ADF. If it is jammed, remove it.
Step
1 Document first side rear actuator
catching on some position
2 Second side rear sensor
catching on some position
3 ADF motor failure
4 Document first side rear
sensor failure
5 Second side rear sensor failure
6 Main PCB failure
7 ADF drive unit failure
■ 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 open sensor failure
5 Main PCB failure
Cause
Cause
2-78
Remedy
Correct catching of the document first side
rear actuator.
Correct catching of the second side rear
sensor.
Replace the ADF motor.
Replace the document first side rear
sensor PCB ASSY.
Replace the second side rear sensor.
Replace the main PCB ASSY.
Replace the ADF unit.
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.
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