Advertisement
SECTION 512-700-100
Transferring from speakerphone to handset
3.06
operation. Lift handset during speakezi>hone
operation to automatically transfer to handset
operation.
When it is necessary to transfer back
to speakerphone, refer to 3.05 to prevent disconnect.
4.
MAINTENANCE
Remove power from
set before attempting any maintenance
of speakerphone components.
Tests and Adjustments
When system is installed or maintenance is
4.01
performed on any component, make the
following tests of speakerphone operation:
(1) Place a speakerphone call to the testdesk.
(2) Adjust loudspeaker volume to moderately
loud listening level.
(3) Have test center repeat the question "In
what suburb does Joe live?" several times.
(4) If choppiness is detected in the sentence,
particularly in the first b in
the t in
what,
the transmitter and loudspeaker set.
(5) Repeat this test at a high listening level by
turning the volume control to maximum
volume.
If voice-switching caused by external telephone
4.02
audible signaling devices is encountered:
(1) Place audible signaling devices away from
transmitter unit, if possible.
(2) Lower volume of audible signaling devices
to level that will not cause voice-switching
feature to operate.
(3) Install audible signal cutoff using the "RING
CUTOFF" or "A UX RELAY" option as
needed. Use the leads to common signal control
Page 6
BSP S12-700-100-i01_1973-05-06.jpg
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Mar 02, 2012 23:14:30
108A
loudspeaker
suburb
increase the distance between
and common ringer or buzzer circuit for this
cutoff feature.
If speakerphone fails to operate properly,
4.03
refer to Table A for trouble analysis.
Cleaning
Clean plastic covers and housings with water
4.04
dampened KS-2423 cloth or equivalent.
not use scouring powders or cleaners.
Removal of Plastic Parts
Do not attempt any changes or repairs
to either the
loudspeaker set other than to replace
the loudspeaker set mounting cord or
the respective plastic parts for either
the transmitter or loudspeaker set.
The plastic housing on the 108A loudspeaker
4.05
set is held in place by two screws located
on the bottom of the set.
housing, remove the two screws from the bottom
of the set and slide the cover off the chassis
(Fig. 3).
Do not remove the circuit board from
Note:
the chassis.
and
The plastic covers on the 680A transmitter
4.06
snap into place. First, remove the stationary
cover by squeezing with fingers on the front and
back surface and lifting gently.
the rocker cover with fingers, lifting along the
edge adjacent to the thumb wheel.
Change of Loudspeaker Set Cord
First remove housing as in 4.05.
4.07
loosen the screws that hold the spade tips,
and remove the spade tips.
screw that fastens the stay band of the cord. Slide
the spade tips and wafers out the hole in the
bottom of the plastic chassis.
cord, reverse the procedures.
Be careful not to damage the circuit
Note:
board, particularly the flexible areas of the
bends.
Do
680A
108A
transmitter or
To remove the plastic
Second, pry up
Next,
Next remove the
To install the new
Advertisement
