Troubleshooting Of Fax Functions; Fax Can't Send It - Brother MFC-9320CW Service Manual

9.

TROUBLESHOOTING OF FAX FUNCTIONS

9.1

FAX can't Send it.

<User Check>
- Verify that the telephone cord is securely inserted into the right socket.
Step
1 Dialing mode
setting
2 Connection
between main PCB
and NCU PCB
3 Connection
between main PCB
and panel PCB
4 Contact of rubber
key
5 NCU PCB
6 Panel PCB
7 Main PCB
Cause
Does a dialing signal
(PB or DP) come out
normally in each mode?
(Use telephone line
emulator.)
Are the main PCB and
NCU PCB connected
properly?
Are the main PCB and
panel PCB connected
properly?
Does the rubber key
work correctly?
Is the problem solved
after replacing the NCU
PCB ASSY?
Is the problem solved
after replacing the
panel PCB ASSY?
Is the problem solved
after replacing the main
PCB ASSY?
Check
Result
Yes
No
No
No
Yes
Yes
Yes
3-95
Remedy
Check the dialing mode
setting at customer's
again. Check the
telephone line cord
between machine and
socket.
Reconnect the
connector properly.
Reconnect the
connector properly.
Replace the rubber Key.
Replace the NCU PCB
ASSY.
Replace the panel PCB
ASSY.
Replace the main PCB
ASSY.
Confidential