User Guide

5-15 Flow chart of trouble shooting and Circuit Diagram
5-9 Ring Indicator
Ring Indicator LED does not
work
GPO2 by Test S/W
Q101 pin 2 = "H"?
Q101 pin 3 = "L"?
CN503 pin 3 = "L"?
Replace Q101
END
Resolder CN503, LED
Yes
No
Yes
Yes
No
No
Key PCB is OK?
Replace the Key PCB
Yes
No