Troubleshooting For Fax Problems; Fax Cannot Be Sent; Fax Cannot Be Received; Bell Does Not Sound - Brother DCP-8110DN Service Manual

4.13 Troubleshooting for Fax Problems

4.13.1 Fax cannot be sent

<User Check>
- Check that the line cord is inserted into the socket correctly.
- Check that the dial function setting (tone/pulse) is correct.
Step
Connection failure of the NCU PCB
1
harness
2 Rubber key failure
3 Panel PCB failure
4 Touch panel PCB failure
5 NCU PCB failure
First side CIS unit or second side
6
CIS unit failure
7 Main PCB failure

4.13.2 Fax cannot be received

<User Check>
- Check that the line cord is inserted into the socket correctly.
- Check that the receiving mode setting is correct.
Step
Connection failure of the NCU PCB
1
harness
2 NCU PCB failure
3 Main PCB failure

4.13.3 Bell does not sound

<User Check>
- Check that "0" is not set for the number of rings.
- Check that "0" is not set for the bell volume.
Step
Connection failure of the speaker
1
harness
2 Speaker failure
3 NCU PCB failure
4 Main PCB failure

4.13.4 Communication error occurs

<User Check>
- Check whether there is any noise source near the machine.
Step
Connection failure of the NCU PCB
1
harness
2 NCU PCB failure
3 Main PCB failure
Cause
Check the connection of the NCU PCB
harness, and reconnect it if necessary.
Replace the rubber key.
Replace the panel PCB ASSY.
Replace the touch panel PCB ASSY.
Replace the NCU PCB ASSY.
Replace the first side CIS unit or second
side CIS unit.
Replace the main PCB ASSY.
Cause
Check the connection of the NCU PCB
harness, and reconnect it if necessary.
Replace the NCU PCB ASSY.
Replace the main PCB ASSY.
Cause
Check the connection of the speaker
harness, and reconnect it if necessary.
Replace the speaker unit.
Replace the NCU PCB ASSY.
Replace the main PCB ASSY.
Cause
Check the connection of the NCU PCB
harness, and reconnect it if necessary.
Replace the NCU PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
Remedy
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