Brother DCP-J752DW

2-32
Confidential
■ Error Code 3F
Carriage motor cannot stop.
<User Check>
- Remove the jammed recording paper from the engine part.
■ Error Code 40
Casing internal thermistor problem
When the power was turned on, the casing internal thermistor detected a temperature of -20 degrees
centigrade or lower, or 80 degrees centigrade or higher.
Unable to print 3F
LCD
Step Cause Solution
1 Carriage motor harness
connection failure
Reconnect the carriage motor harness.
2 CR encoder strip stained Clean the CR encoder strip.
3 CR encoder strip defective Replace the CR encoder strip.
4 CR encoder sensor defective Replace the carriage PCB ASSY.
5 Carriage motor defective Replace the carriage motor.
6 Main PCB defective Replace the main PCB ASSY.
Unable to print 40
LCD
Step Cause Solution
1 Casing internal thermistor harness
connection failure
Reconnect the casing internal thermistor harness.
2 Casing internal thermistor
defective
Replace the ink refill ASSY.
3 Main PCB defective Replace the main PCB ASSY.