Brother MFC5490CN Service Manual page 110

Error Code
Symptom
(Hex)
8F The paper feed motor is
being driven and cannot
be stopped.
90-A0 Not used.
A1 Scanner cover (scanner
unit) opened
A2 During scanning or
ejecting, a document of
90 cm* or longer is
detected.
A3 The document rear
sensor does not come
ON during document
pull-in operation.
* This value is default and can be modified by WSW16, selector 7.
Probable Cause
Software malfunction
Paper feed motor harness not
connected correctly
Main PCB defective
Scanner cover sensor (carbon
switch) broken
Scanner cover sensor
actuator unhooked
Rubber keypad defective
Control panel PCB defective Replace the control panel PCB.
Main PCB defective
Document jam
Foreign materials in the
machine
Document rear sensor
actuator caught on the
surrounding parts
Document rear sensor broken Replace the document sensor
Document ejection roller
defective or not rotating
Main PCB defective
Document jam
Foreign materials in the
machine
Document rear sensor
actuator caught on the
surrounding parts
Document rear sensor broken Replace the document sensor
ADF motor defective
ADF-related gear(s) broken
Main PCB defective
4-20
Solution
Open and close the scanner
cover.
Unplug and plug the AC cord.
Correct the connection.
Replace the main PCB.
Replace the control panel PCB.
Set the scanner cover sensor
actuator into place.
Replace the rubber keypad.
Replace the main PCB.
Remove the jammed
document.
Remove foreign materials.
Correct the surrounding parts
on which the actuator caught.
PCB.
Replace the ADF unit.
Replace the main PCB.
Remove the jammed
document.
Remove foreign materials.
Correct the surrounding parts
on which the actuator caught.
PCB.
Replace the ADF motor.
Replace the ADF unit.
Replace the main PCB.
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