Brother DCP6690CW Service Manual page 130

Error Code
Symptom
(Hex)
52 The purge cam switch
does not come ON at
each detection point.
53-56 Not used.
57 The head/carriage unit
does not return to the
home position (capping
position).
Probable Cause
Planetary arm assembly not
engaged correctly
Purge cam switch harness not
connected correctly
PF encoder sensor defective
ASF motor defective
Purge cam switch broken
Gear(s) on the maintenance
unit broken
Abnormal load applied to the
purge cam
Paper feed motor broken
Main PCB defective
Head cap unit, head wiper or
other parts on the
maintenance unit interfering
with the head/carriage unit
ASF motor defective
CR encoder strip stained
Carriage PCB ASSY
defective
Carriage motor defective
Head/carriage unit defective
Main PCB defective
Power supply PCB defective Replace the power supply
4-18
Solution
Set the maintenance unit into
place.
If the planetary arm does not
move smoothly, clean it.
Correct the connection to the
main PCB.
Replace the PF encoder/
registration sensor harness unit.
Replace the ASF motor.
Replace the maintenance unit.
Replace the engine unit.
Replace the main PCB.
Set these parts back into place.
If any part on the maintenance
unit does not operate smoothly,
replace the unit.
Replace the ASF motor.
Replace the CR encoder strip.
Replace the carriage PCB
ASSY.
Replace the carriage motor.
Replace the head/carriage unit.
Replace the main PCB.
PCB.
Confidential