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Confidential
3.12.6 Dialing function does not switch between “Tone” and “Pulse”
3.12.7 A communication error occurs
3.12.8 Reception mode cannot be changed
3.12.9 Caller ID are not displayed
Step Cause Remedy
1 Connection between main
PCB and NCU PCB
Connect the connector between the main
PCB ASSY and NCU PCB ASSY correctly.
2 NCU PCB failure Replace the NCU PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 NCU PCB failure Replace the NCU PCB ASSY.
2 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.