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10. IF A FAILURE IS DETECTED
10.1. Infrared Chairman Unit TS-901/801 and Infrared Delegate Unit TS-902/802
Symptom
Cause and Points to Check
Remedy
Cannot turn ON power. (When using the lithium-ion battery)
Battery not charged.
Batteries are not charged as shipped
from the factory. Be sure to fully charge
the battery before use. (Refer to the
separate Installation manual.)
(When using the AC adapter)
Power cord or DC input plug not
connected.
Connect the power cord (supplied
with the AC adapter) and the DC input
plug correctly. (Refer to the separate
Installation manual.)
No sound output
from the speaker or
headphones.
Monitor Selector switch not correctly
set. (TS-901/902 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 Infrared Transmitter/
Receiver unit I/O terminals.
Live Status indicator on the Infrared
Transmitter/Receiver unit remains dark.
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
separate Installation manual.)
Infrared emitter/detector exposed to
direct sunlight or spotlight.
Reposition in a location not exposed
to direct light. (Refer to the separate
Installation manual.)
Infrared Transmitter/Receiver units
and Conference units not positioned
to permit their infrared emitter/detector
sections to be in sight of each other.
TS-905 or TS-907 Infrared Transmitter/
Receiver units not correctly selected to
match the ceiling height and installed so
that all the Conference units are in the
communications service area.
(If both the Power and Speech indicators
simultaneously flash, this indicates
the unit is out of the communications
service area.)
Install all the units so that they are in
clear view of each other, and select
and install the Infrared/ Transmitter/
Receiver units correctly for the ceiling
height.
(Refer to the separate Installation
manual.)
Cable between the Infrared Transmitter/
Receiver unit and the Central Unit not
connected.
Connect the cable.
Priority speech is in progress.
Operate the key after the priority speech
is completed.
