Brother MFC640CW Service Manual page 261

Error Code
(Hex)
81 Recording paper jam.
(The paper width sensor
keeps detecting paper
even after completion of
paper ejection.)
82 Recording paper jam in
paper pull-in operation.
(The paper width sensor
fails to detect the leading
edge of paper.)
83 Recording paper jam.
(The registration sensor
detects paper abnormally
early in paper feeding
operation.)
Symptom
9 - 1 0
Probable Cause
Foreign materials in the
paper path
The paper ejection
roller does not rotate
correctly
Paper width sensor
broken
Main PCB defective
Foreign materials in the
paper path.
Paper not loaded
correctly in the paper
tray
Head flat cable
connection failure
Paper width sensor
defective
Main PCB defective
Paper is not correctly
set in the paper tray
Separation pad
damaged
Registration sensor
actuator unhooked
Main PCB defective
PF encoder sensor
defective
Solution
Remove foreign
materials.
Replace the paper
ejection roller.
(Engine unit)
Replace the carriage
PCB ASSY.
Replace the main PCB.
Remove foreign
materials.
Reload paper.
Insert the head flat
cables correctly.
Replace the carriage
PCB ASSY.
Replace the main PCB.
Reload paper.
Replace the paper tray.
Set the registration
sensor actuator into
place.
Replace the main PCB.
Replace the PF sensor
PCB.
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