Brother MFC-J6520DW - Head Voltage Fails to be Turned off

Confidential
2-33

Error Code 3F
Carriage motor cannot stop.
 Error Code 40
Casing internal thermistor defective
Casing internal thermistor detects -20 °C or less and 80 °C or more when power is ON.
 Error Code 42
Head voltage fails to be turned OFF.
User Check
- They may occur due to lower surrounding temperature. Use in warmer surrounding
temperature.
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 ASSY.
6 Main PCB defective Replace the main PCB ASSY.
Unable to Print 40 LCD
Step Cause Solution
1 Casing internal thermistor
defective
Replace the ink cartridge PCB ASSY.
2 Main PCB defective Replace the main PCB ASSY.
Unable to Print 42 LCD
Step Cause Solution
1 Head flat cable connection
failure
Reconnect the head flat cable.
2 Carriage flat cable connection
failure
Reconnect the carriage flat cable.
3 Carriage PCB defective Replace the carriage PCB ASSY.
4 Head defective Replace the head/carriage unit.
5 Power supply PCB defective Replace the power supply PCB ASSY.
6 Main PCB defective Replace the main PCB ASSY.