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Intercom System
TOA Electronics
TOAEXES-5OOO
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MEMO
Contents
Main
,
CPU off ?
-61-
on HCU li t as Fig. 1
CPU-
P54 P56
Before power supply check, confirm the following three
1. Is voltage selector set correctly?
2. Is AC power supplied? 3. Is power switch O N ?
Start checking after disconnecting all wiring connected
to DC output of the power supply unit.
Faulty power transformer.
1. Turn off the privacy switch on all stations in the
1-1
1-2 1-3 1-4
1-5
Page
8-3. FAULT IN SPECIFIC STATION ONLY
Find the cause according to the following table if the fault
party.
lies with a specific station only, not with all stations.
be made at privacy
Specific Lamp
Fault in photo coupler PC-504
the speech test for each station can then take place.
The sound volume can be adjusted by the volume on the
The Press-To-Talk bar on the station keyboard must be
in high noise areas (more than 60dB noise).
tone quality, etc.) must be tested with each line in
Secretary Transfer: Is transfer made correctly
sure that the switch works.