F-2 - Page 245

Confidential

9-57

F-2 

Speed dialing and One-touch dialing can't be used. 

Possible cause 

Step 

Check 

Result

Remedy 

Speed dialing, 
One-touch dialing 

1 

A fax transmission can 
be made using the key, 
ten? 

Yes  Replace the main PCB. 

Dialing mode 
setting 

2 

Dialing signal (PB or 
DP) comes out normally 
in each mode. 
(Use telephone line 
emulator.) 

Yes  Check the dialing mode setting 

at customer's again. 
Check the telephone line cord 
between machine and socket. 

Connection 
between main 
PCB and NCU 
PCB 

3 

Main PCB and NCU 
PCB are properly 
connected. 

No 

Fix the connection properly. 

Harness between 
main PCB and 
NCU PCB 

4 

Harness is damaged. 

Yes  Replace the harness with a 

normal part. 

Connection 
between main 
PCB and control 
panel PCB 

5 

Main PCB and control 
panel PCB are properly 
connected. 

No 

Fix the connection properly. 

Harness between 
main PCB and 
control panel PCB 

6 

Harness is damaged. 

Yes  Replace the harness with a 

normal part. 

Rubber key 

7 

Replacement of rubber 
key solves the problem. 

Yes  Replace the rubber key with a 

normal part. 

NCU PCB 

8 

Replacement of NCU 
PCB solves the problem. 

Yes  Replace the NCU PCB with a 

normal part. 

Control panel PCB

9 

Replacement of control 
panel PCB solves the 
problem. 

Yes  Replace the control panel PCB 

with a normal part.