TOA Electronics TOAEXES-5OOO manual Trouble Shooting Guide

8.TROUBLE SHOOTING GUIDE

Repairing of the EXES-5000 system is basically done by replacing defective units with good ones. The system's faults in an installation can be divided into the fol- lowing categories.

1.Faults in an exchange

2.Faults in a station

3.Cable faults

To make system repairing easier, find which category is

involved, then refer to the chart below for assistance

in fault finding.

All stations do	not operate.	Fault	in specific station
Same symptom in	every station.	only.

Fault in an exchange. Cable fault. Fault in a station.

Power supply	Mis-wiring between exchange
Plug-in unit	and terminal board.
(Common control)	Mis-wiring such as short,
Back wiring on	broken wire,	etc.
frame	Misconnection	in station
	jack.

Key board switch fault. Board assembling fault. Speaker, microphone fault. Microswitch, connecting cable fault.

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