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Troubleshooting of Fax Functions
M085/M086 6-84 SM
6.10.5 SPEAKER IS SILENT DURING ON-HOOK DIALING.
Possible cause and Remedy
1. Connection between main PCB and speaker
Are the main PCB and speaker connected correctly?
No: Reconnect the connector.
2. Speaker
Is the problem solved after replacing the speaker?
Yes: Replace the Speaker.
3. Connection between main PCB and NCU PCB
Are the main PCB and NCU PCB connected correctly?
No: Reconnect the connector.
4. Connection between main PCB and control panel PCB
Are the main PCB and control panel PCB connected correctly?
No: Reconnect the connector.
5. NCU PCB
Is the problem solved after replacing the NCU PCB ASSY?
Yes: Replace the NCU PCB ASSY.
6. Main PCB
Is the problem solved after replacing the main PCB ASSY?
Yes: Replace the main PCB ASSY.