User Guide

After Sales
Technical Documentation
THA–4S
Troubleshooting Guide
Page 12
Original, 12/95
Call Setup Fault
N
Y
Does
Call Setup
fault
Y
Y
Y
N
N
Subscriber data
RSSI operating?
Data detection
If programming is not possible
the phone
assume SERV
mode?
OK?
check
–MBUS circuit (V121)
–D102 control line soldering
check operation of:
–ST signal
–SAT/DSAT signal
–Transmitter
–Synthesiser
–VCO
if all OK change D100
Replace D100
check
–D101/pin 54 A/D con
–N201/pin 12 for RSSI
check
–D100/pin 27 for data signal
–D201/pin 9 for signal
of D100/pin 27?
N