Service manual

Troubleshooting of Fax Functions
SM 6-85 M085/M086
Trouble –
shooting
6.10.6 DIALING FUNCTION DOES NOT SWITCH BETWEEN
"TONE" AND "PULSE".
Possible cause and Remedy
1. Connection between main PCB and NCU PCB
 Are the main PCB and NCU PCB connected correctly?
No: Reconnect the connector.
2. NCU PCB
 Is the problem solved after replacing the NCU PCB ASSY?
Yes: Replace the NCU PCB ASSY.
3. Main PCB
 Is the problem solved after replacing the main PCB ASSY?
Yes: Replace the main PCB ASSY.