TOA Electronics TOAEXES-5OOO manual

TOA EXES-5OOO

INTERCOM SYSTEM

TROUBLE SHOOTING GUIDE

TOA ELECTRIC CO., LTD.

KOBE, JAPAN

INTERCOM SYSTEM

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.