TOA Electronics EX-16 manual Trouble Shooting Guide

4.3.3Relationship Between Ambient Noise and Conversation Mode

The EX-16 system is provided with voice switches for the press-to-talk function which is required when the ambient noise level is high. Below is a guide for using the press-to-talk function.

(Up to 60 phons)	(Hands free)	(Up to 60 phons)
(A)		(B)
	(Hands free)
(Up to 60 phons)	(Hands free)	(Above 60 phons)
(A)		(B)
	(Press-to-talk)

5. Trouble Shooting Guide

Repairing of the EX-16 system is basically done by replacing defective units with good ones. The system's faults in an installation can be divided into the following categories.

1.Faults in an exchange

2.Faults in a station

3.Faults in cable

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. Same symptom in every station.

Fault in specific station only.

Fault in an exchange.

*Power supply

*Plug-in unit (Common control)

Cable fault. Fault in a station.

*Mis-wiring such a short, broken wire, etc.

*Misconnection in station jack.

*Key board switch fault.

*Board assembling fault.

*Speaker, microphone fault.

*Microswitch, connecting cable fault.

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