Brother MFC-J6935DW - A Communications Error Occurs; Fax Problems; No Faxes Can be Received; No Faxes Can be Sent

Confidential
2-89
4.9 Fax Problems
4.9.1 No faxes can be sent
< User Check >
- Check that the line cord is inserted correctly into the socket.
- Check that the dialing function setting (tone/pulse) is correct.
- Check that the phone cord is not connected to EXT terminal.
4.9.2 No faxes can be received
< User Check >
- Check that the line cord is inserted correctly into the socket.
- Check if the receiving mode setting is correct.
- Check that the phone cord is not connected to EXT terminal.
4.9.3 A communications error occurs
< User Check >
- Change the “compatibility” of the function menu to see if the error is cleared.
- Check that there is no noise source around this machine body.
Step Cause Solution
1 Modem PCB harness
connection failure
Reconnect the modem PCB harness.
2 Control panel ASSY defective Replace the control panel ASSY.
3 Modem PCB defective Replace the modem PCB ASSY.
4 First side or second side CIS
unit defective
Replace the first side or second side CIS unit.
5 Main PCB defective Replace the main PCB.
Step Cause Solution
1 Modem PCB harness
connection failure
Reconnect the modem PCB harness.
2 Modem PCB defective Replace the modem PCB ASSY.
3 Main PCB defective Replace the main PCB.
Step Cause Solution
1 Modem PCB harness
connection failure
Reconnect the modem PCB harness.
2 Modem PCB defective Replace the modem PCB ASSY.
3 Main PCB defective Replace the main PCB.