Sony PCS-1500 Service Manual page 138

4-1. Check Items Before Starting Self-diagnostics
Symptom: Cannot connect to the circuit (V.35).
SS-09
Contents of the dial
list setup and system
setup are correct?
YES
Cable connections,
TA setup and NCU setup
are correct?
YES
When the loop
back number of Telecommunication
Company is dialed up, the
line is connected?
NO
The loop back
number of Telecommunication
Company can be called by
manual dialing?
YES
The system operates
normally when the IF-745
board is replaced
YES
Replace the IF-745 board
4-8
NO
Set them correctly
NO
Connect and set them correctly
YES
Remote station is defective, or
their setup is incorrect
NO
Line is defective, or TA or
NCU is defective
NO
0-0
PCS-1500/1500P