TOA Electronics EX-16 - Manual (Page 30)

(3) If the voltage measured is normal at every point, connect one unit
at a time checking the voltage after each connection.
(4) If the voltage is upset after connecting any given unit, the unit is to
be replaced.
(b) If there is no response to dialing:
(1) Disconnect the plug for the particular station from the line and
check the wiring between the exchange and the station.
(2) If no wiring error is detected, test after changing each station.
(3) If preceding steps do not remedy the situation, replace the units
attached to the station in the same order as the LAU-16 and CPU-16
and test again.
(c) In the event of a conversation failure or persistent noise during
conversation,
(1) Disconnect the plug between each station and the exchange and
check the wiring.
(d) If conversation is frequently interrupted:
(1) If speech from A to B is interrupted, turn down the volume control
of speaker at B's station.
(2) If speech from B to A is interrupted, turn down the volume of
speaker at A's station.
(3) If conversation is interrupted both ways or block oscillation
should occur upon ceasing of the ringing tone, turn down the
volume at both stations.
Note 1: The volume control is located at the back of the station. Adjust with
a small (—) screwdriver.
Note 2: The above-mentioned trouble tends to occur when the station is
installed in a room subject to echo or reverberations or when the
station is not located properly with respect to the walls of the room it
is in. Avoid installation of the station in any of the locations illus-
trated in the following diagram.
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