Fax Cannot Be Transmitted And Received; No Bell Ring; Speaker Is Silent During On-Hook Dialing - Brother DCP-9055CDN Service Manual

3.12.3 FAX cannot be transmitted and received.

<User Check>
- Verify that the telephone cord is securely inserted into the right socket.
- Check the dial mode setting again.
Step
1
2
3

3.12.4 No bell ring

<User Check>
- Set a value other than "0" to the number of bell rings.
- Set a value other than "OFF" to the bell volume.
Step
1
2
3
4
5

3.12.5 Speaker is silent during On-hook dialing

Step
1
2
3
4
5
6
Cause
Connection between main
PCB and NCU PCB
NCU PCB failure
Main PCB failure
Cause
Harness connection failure of
speaker
Connection between main
PCB and NCU PCB
Speaker failure
NCU PCB failure
Main PCB failure
Cause
Harness connection failure of
speaker
Speaker failure
Connection between main
PCB and NCU PCB
Connection between main
PCB and panel PCB
NCU PCB failure
Main PCB failure
Connect the connector between the main
PCB ASSY and NCU PCB ASSY correctly.
Replace the NCU PCB ASSY.
Replace the main PCB ASSY.
Check the harness connection of the speaker
and reconnect it.
Connect the connector between the main
PCB ASSY and NCU PCB ASSY correctly.
Replace the speaker unit.
Replace the NCU PCB ASSY.
Replace the main PCB ASSY.
Check the harness connection of the speaker
and reconnect it.
Replace the speaker unit.
Connect the connector between the main
PCB ASSY and NCU PCB ASSY correctly.
Connect the connector between the main
PCB ASSY and panel PCB ASSY correctly.
Replace the NCU PCB ASSY.
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
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