Brother mfc8440 Service Manual page 238
Hide thumbs
Also See for mfc8440:
- User manual (426 pages) ,
- Software user's manual (183 pages) ,
- Quick setup manual (52 pages)
Table of Contents
Advertisement
F-2
Speed dialing and One-touch dialing can't be used.
Possible cause
Step
Speed dialing,
1
One-touch
dialing
Dialing mode
2
setting
Connection
3
between main
PCB and NCU
PCB
Harness
4
between main
PCB and NCU
PCB
Connection
5
between main
PCB and control
panel PCB
Harness
6
between main
PCB and control
panel PCB
Connection of
7
FPC key
FPC key
8
NCU PCB
9
Control panel
10
PCB
F-3
FAX can't be received.
User Check
(1) Verify that the telephone cord is securely inserted.
Possible cause
Step
Receive mode
1
setting
NCU PCB
2
Main PCB
3
Check
A fax transmission can be
made using the key, ten?
Dialing signal (PB or DP)
comes out normally in each
mode.
(Use telephone line emulator.)
Main PCB and NCU PCB are
properly connected.
Harness wire is damaged.
Main PCB and control panel
PCB are properly connected.
Harness wire is damaged.
FPC key is properly
connected.
Replacement of FPC key
solves the problem.
Replacement of NCU PCB
solves the problem.
Replacement of control panel
PCB solves the problem.
Check
Receive mode is set to
automatic receive mode.
Replacement of NCU PCB
solves the problem.
Replacement of main PCB
solves the problem.
6-31
MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN
Result
Remedy
Yes
Replace the main PCB.
Yes
Check the dialing mode
setting at customer's again.
Check the telephone line
cord between machine and
socket.
No
Fix the connection properly.
Yes
Replace the harness with a
normal part.
No
Fix the connection properly.
Yes
Replace the harness with a
normal part.
No
Fix the connection properly.
Yes
Replace the FPC key with a
normal part.
Yes
Replace the NCU PCB with
a normal part.
Yes
Replace the control panel
PCB with a normal part.
Result
Remedy
No
Set the receive mode to
automatic receive mode.
Yes
Replace the NCU PCB with
a normal part.
Yes
Replace the main PCB with
a normal part.
SERVICE MANUAL
Advertisement
Chapters
Table of Contents
Troubleshooting
