Head Voltage Does Not Turn Off; Head Thermistor Problem; When The Power Was Turned On, The Head Thermistor Detected A Temperature Of - Brother DCP-J552DW Service Manual

■ Error Code 42
Unable to print 42

Head voltage does not turn OFF.

<User Check>
- This may occur when the surrounding temperature is low. Increase the surrounding temperature
before use.
Step
1 Head flat cable connection failure
2 Carriage flat cable connection
failure
3 Carriage PCB defective
4 Head defective
5 Power supply PCB defective
6 Main PCB defective
■ Error Code 43
Unable to print 43

Head thermistor problem

When the power was turned on, the head thermistor detected a temperature of -20 degrees
centigrade or lower, or 80 degrees centigrade or higher.
Step
1 Carriage flat cable connection
failure
2 Carriage PCB defective
3 Head defective
4 Main PCB defective
Cause
Reconnect the head flat cable.
Reconnect the carriage flat cable.
Replace the carriage PCB ASSY.
Replace the head/carriage unit.
Replace the power supply PCB ASSY.
Replace the main PCB ASSY.
Cause
Reconnect the carriage flat cable.
Replace the carriage PCB ASSY.
Replace the head/carriage unit.
Replace the main PCB ASSY.
2-33
LCD
Solution
LCD
Solution
Confidential