Brother MFC-9125CN - Dialing Function Does Not Switch between Tone and Pulse

3-99
Confidential
9.6 Dialing Function does not Switch between “Tone” and
“Pulse.”
Step Cause Check
Result
Remedy
1 Connection
between main
PCB and NCU PCB
Are the main PCB and
NCU PCB connected
properly?
No Reconnect the
connector properly.
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.