Brother MFC620CN Service Manual page 325

Error Code
(Hex)
8E Max. speed error in the
paper feed motor.
(Not used.)
8F-A0 Not used.
A1 Scanner cover (scanner
unit) opened.
A2 Document length
exceeding the scan
limitation.
During scanning, 90 cm or
longer of a document is
detected.
During document feeding
or ejecting, 400 cm or
longer of a document is
detected.
A3 The document rear sensor
does not come ON during
document pull-in
operation.
Symptom
9 - 1 2
Probable Cause
Abnormal load applied
to the paper feed roller
PF encoder disk
stained or scratched
PF encoder sensor
defective
Paper feed motor
broken
Main PCB defective
Scanner open sensor
broken
Scanner open sensor
actuator unhooked
Control panel PCB
defective
Document jam
Document rear sensor
actuator caught on the
surrounding parts
Document rear sensor
broken
Document jam
Document rear sensor
actuator caught on the
surrounding parts
Document rear sensor
broken
Solution
Check the PF roller gear
and its related gears.
Replace the PF encoder
disk.
Replace the PF sensor
PCB.
Replace the paper feed
motor.
Replace the main PCB.
Replace the rubber
keypad.
Set the scanner open
sensor actuator into
place.
Replace the control
panel PCB.
Remove the jammed
document.
Correct the surrounding
parts on which the
actuator caught.
Replace the document
rear sensor.
Remove the jammed
document.
Correct the surrounding
parts on which the
actuator caught.
Replace the document
rear sensor.
Confidential