Prints Only Single Side Of The Paper When Duplex-Printing - Brother MFC-J3520 Service Manual

4.2.6 Prints only single side of the paper when duplex-printing

User Check
- Set the driver settings to duplex-printing.
- Check if the recording papers are not overlapping each other. Shuffle the papers
thoroughly in the case of overlapping.
Step
1 Switching lever guide defective Replace the maintenance unit.
2 Main PCB defective
Cause
Replace the main PCB ASSY.
2-60
Solution
Confidential