Brother MFC-J6520DW - Head Voltage Drops too Quick; The Purge Cam Switch Is Not Switching ON;OFF

Confidential
2-36

Error Code 4F
Head voltage drops too quick.
User Check
- They may occur due to lower surrounding temperature. Use in warmer surrounding
temperature.
 Error Code 50
The purge cam switch is not switching ON/OFF.
User Check
- Remove the jammed paper in platen part.
Unable to Print 4F 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.
Unable to Print 50 LCD
Step Cause Solution
1 Foreign materials in the
maintenance unit
Remove foreign materials.
2 Purge cam switch harness
connection failure
Reconnect the purge cam switch harness.
3 Paper feed motor defective Replace the paper feed motor.
4 PF encoder sensor defective Replace the PF encoder sensor PCB ASSY.
5 Maintenance unit defective Replace the maintenance unit.
6 Main PCB defective Replace the main PCB ASSY.