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18. IF A FAILURE IS DETECTED
18.1. Chairman Unit TS-911/811 and Delegate Unit TS-912/812
Symptom
Cause and Points to Check
Remedy
Cannot turn ON power. Both the Central unit and the Expansion
unit are not powered up.
Switch on the Central unit’s power and
power up the Expansion unit through
the AC adapter.
They are not connected properly.
Check all connections. (Refer to the
No sound output
from the speaker or
headphone.
Monitor Selector switch not correctly
set. (TS-911/912 only)
Set the switch to the position where
sound can be heard.
Central unit’s Microphone Mix/Cut
switch not correctly set.
Monitor volume control not correctly
adjusted.
Adjust the volume to an appropriate
level.
Headphone plug not fully inserted.
Insert the headphone plug fully into the
jack.
Cannot initiate speech. Central Unit’s rear panel-mounted Short
Circuit indicator remains lit.
Check the cable connected to the
Central Unit’s Expansion unit I/O
terminals.
Cannot operate the
Talk key.
Unit address numbers outside range of
001 – 192.
Set the unit address number within
the range of 001 – 192. (Refer to the
They are not connected properly.
Check all connections. (Refer to the
Priority speech is in progress.
Operate the key after the priority speech
is completed.
Indicator on the
microphone goes out
during speech.
Mic-Off function set to ON.
Disable the Mic-Off function if a long
pause is made during speech.
Chime does not
sound when the
Priority Speech key is
pressed.
Central unit’s rear panel-mounted
Priority Chime volume control is set to
the minimum volume position.
Adjust the volume control to an
appropriate level.
The Priority chime mute switch in the
Chairman unit’s bottom is set to ON.
Set the Priority chime mute switch to
OFF.
Mic-Off function does
not work.
High background noise level generated
by such equipment as air conditioners.
In areas where the background noise
level is high, the Mic-Off function may
not work.
Reposition in a low-noise location or
turn off the Mic-Off function.
