Brother MFC-8540DN Service Manual

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Confidential
 Error code AE00
Unit home position could not be detected after the power switch was turned ON.
 Error code AF00
Home position is still being detected even after the first side CIS unit was moved.
 Error code B000
Detected that the first side CIS flat cable or second side CIS flat cable was not inserted
correctly when function code 55 was executed.
Step Cause Remedy
1
Incorrect correction data for first
side CIS unit
Execute "Acquire white level data (function
code: 55)".
2
First side CIS unit drive belt
coming off
Reattach the first side CIS unit drive belt.
3 First side CIS unit failure Replace the first side CIS unit.
4 FB motor failure Replace the document scanner unit.
5 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Dust on the CIS guide shaft Remove the dust on the CIS guide shaft.
2 CIS drive belt coming off Reattach the CIS drive belt.
3 CIS carriage coming off Reattach the CIS carriage.
4
Connection failure of the FB
motor harness
Reconnect the FB motor harness.
5 First side CIS unit failure Replace the first side CIS unit.
6 FB motor failure Replace the document scanner unit.
7 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1
Connection failure of the first
side CIS flat cable
Reconnect the first side CIS flat cable.
2
Connection failure of the second
side CIS flat cable
Reconnect the second side CIS flat cable.
3 First side CIS unit failure Replace the first side CIS unit.
4 Second side CIS unit failure Replace the second side CIS unit.
5 Main PCB failure Replace the main PCB ASSY.

Brother MFC-8540DN Specifications

General

Brand	Brother
Model	MFC-8540DN
Category	All in One Printer
Language	English