Sony PCS-1500 Service Manual page 137

Symptom: Cannot connect to line (ISDN).
SS-08
Contents of the dial
list setup and system
setup are correct?
YES
Modular cable is
connected correctly?
YES
When all the ISDN
lines are disconnected, picture
and sound of the local station
are output from the
2B loop back
YES
When all the ISDN
lines are disconnected, picture
and sound of the local station
are output from the
6B loop back
YES
When IF-744 board is not used
When line is
connected to the port A
only, picture and sound of the local
station are output from the
2B telephone office
loop back
YES
Picture and sound
of the local station are
output from the 6B
loop back
YES
When IF-744 board is not used
The remote station
is defective
PCS-1500/1500P
NO
Set it correctly
NO
Connect it correctly
NO
A-6
NO
normally when the IF-744
NO
A-6 Replace the IF-744 board
NO
Replace the IF-744 board
. 2B loop back
Press the START button after the system has started up
normally, input "1L" to A1 and A2, and make a dial.
. 6B loop back
Press the START button after the system has started up
normally, input "1L" to A1, A2, B1, B2, C1, and C2 and
make a dial.
. 2B Telecommunication Company loop back
Press the START button, and input the loop back
number of Telecommunication Company to A1 and A2,
and make a dial.
. 6B Telecommunication Company loop back
Press the START button, and input the loop back
number of Telecommunication Company to A1, A2, B1,
B2, C1, and C2 and make a dial.
The system operates
NO
board is replaced
YES
4-1. Check Items Before Starting Self-diagnostics
A-6
4-7