No bell ring.

Step

Possible cause

Check

Result

Remedy

 

 

 

 

 

1

Ring delay

Ring delay is set to “0”.

Yes

Change the ring delay

 

 

 

 

settings to another value.

2

Ring volume

Ring volume is set to

Yes

Change the ring volume

 

 

“OFF”.

 

setting to another value.

3

Connection

Are the main PCB and

No

Reconnect the connector

 

between main

NCU PCB connected

 

properly.

 

PCB and NCU

properly?

 

 

 

PCB

 

 

 

4

Harness between

Is the harness damaged?

Yes

Replace the harness with

 

main PCB and

 

 

a normal one.

 

NCU PCB

 

 

 

5

Speaker

Is the problem solved

Yes

Replace the Speaker.

 

 

after replacing the

 

 

 

 

speaker?

 

 

6

NCU PCB

Is the problem solved

Yes

Replace the NCU PCB

 

 

after replacing the NCU

 

ASSY.

 

 

PCB ASSY?

 

 

7

Main PCB

Is the problem solved

Yes

Replace the main PCB

 

 

after replacing the main

 

ASSY.

 

 

PCB ASSY?

 

 

 

 

 

 

 

1-68

Confidential