Brother MFC Series Service Manual page 62

■ 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.
2-30
LCD
Solution
LCD
Solution
Confidential