Brother DCP-L8400CDN Service Manual page 107

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Error code A400
Cover is Open
Close the ADF Cover. / Close the ADF Cover, then press Stop[X].
The ADF cover sensor detected that the ADF cover was opened.
< User Check >
- Firmly close the ADF cover.
Step
1 ADF cover actuator caught on
some position
2 ADF cover/document detection
sensor PCB installation failure
3 Connection failure of the ADF
cover/document detection sensor
PCB harness
4 ADF cover damaged
ADF cover sensor failure
5
6 Main PCB failure
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Error code A500
Scan Unable
Remove the original document. Turn the power off, then on again.
Upon scanning a fax, the first side CIS white or black calibration data was not within the
normal range.
Error code A600
Scan Unable A6
Turn the power off and then back on again.
Though a fax was scanned again after A500 error, the first side CIS white or black calibration
data was not within the normal range.
Step
1 First side CIS unit calibration
data error
2 First side CIS flat cable damaged
3 First side CIS unit failure
4 Main PCB failure
Cause
Re-assemble the ADF cover actuator.
Re-assemble the ADF cover/document
detection sensor PCB ASSY.
Reconnect the ADF cover/document
detection sensor PCB harness.
Replace the ADF cover.
Replace the ADF cover/document
detection sensor PCB ASSY.
Replace the main PCB ASSY.
Cause
Perform
"1.3.19 Acquisition of white level data and
setting of CIS scanning area (Function
code 55)" in this
Replace the first side CIS flat cable.
Replace the first side CIS unit.
Replace the main PCB ASSY.
2-77
Remedy
Remedy
"Function code 55". (Refer to
chapter.)
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