Sony PCS-1500 Service Manual page 170

4-2. Self-diagnostics Function
V.35-4
Connect the IF-745 board and
the terminal adapter using the
V.35 cable and start up the
application
Enter the loop back number of
the telephone office to A1 of
dial list, select "V.35 with
RS-366" as I/F and make a
transmission
Picture of the
local station is displayed
on monitor, and voice of the
local station is heard
at the local
station?
YES
Repair of the control signal
system is complete
4-40
NO
Transceiver block is defective
[Replace IC202 and C220 to C224]
[Replace IC203 and C225 to C229]
[Replace FL219 and FL220 to
FL223]
V.35-4
PCS-1500/1500P