Brother DCP-8085DN Service Manual page 142

■ Speed dialing and One-touch dialing can't be used.
Step Possible cause
Speed dialing
keys or one-
1
touch dialing
keys
Dialing mode
Setting
2
Connection
between main
3
PCB and NCU
PCB
Harness
between main
4
PCB and NCU
PCB
Connection
between main
5
PCB and control
panel PCB
Harness
between main
6
PCB and control
panel PCB
Contact of rubber
7 key
NCU PCB
8
Control panel
9 PCB
■ FAX can't be received.
<User Check>
- Verify that the telephone cord is securely inserted into the right socket.
Step Possible cause
Receive mode
1 setting
NCU PCB
2
Main PCB
3
Check
Can a fax transmission
be made using the
numeric keys?
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?
Is the harness
damaged?
Are the main PCB and
control panel PCB
connected properly?
Is the harness
damaged?
Is the problem solved
after replacing the
rubber key?
Is the problem solved
after replacing the NCU
PCB ASSY?
Is the problem solved
after replacing the
control panel PCB?
Check
Is the receive mode set
to automatic receive
mode?
Is the problem solved
after replacing the NCU
PCB ASSY?
Is the problem solved
after replacing the main
PCB ASSY?
3-70
Result Remedy
Replace the main PCB
ASSY.
Yes
Check the dialing mode
setting at customer's
again.
Yes
Check the telephone line
cord between machine and
socket.
Reconnect the connector
properly.
No
Replace the harness with a
normal one.
Yes
Reconnect the connector
properly.
No
Replace the harness with a
normal one.
Yes
Replace the rubber Key.
Yes
Replace the NCU PCB
Yes ASSY.
Replace the control panel
Yes PCB.
Result Remedy
Set the receive mode to
No automatic receive mode.
Replace the NCU PCB
Yes ASSY.
Replace the main PCB
Yes ASSY.
Confidential