User Guide

After Sales
Technical Documentation
THA–4S
Troubleshooting Guide
Page 5
Original, 12/95
DC Fault
DC fault
Power consumption
greater than 60ouA
when phone is off
Check voltage
across R131 or
R162 < 2.5mV
Y
N
Check the following:
–voltage across B100,R401;R403,R269
–Switches V221,V216;V217
–Change display – if OK change N203
Check the following:
–XPWON = 0V
–XPWOFF = 0V
–XRES = 0V
If OK change N101