Valcom V-9939A Instruction Manual page 6

microphone: if using a low impedance
balanced
microphone, connect (+) lead to LZ1 and
the (-) lead to LZ2.
___c. Connect one side of the microphone push
to talk switch to the V-9939A SW
terminal.
___d. Connect the other side of the push to talk
switch to the GND OUT terminal.
___12. Connect –24 Vdc (BB) signal battery from
the power supply to pin 30 of the V-9937.
___13. Connect signal ground (BG) of the power
supply to pin 29 of the V-9937.
MICROPHONE
SWITCH
AUDIO
GND STRAP
B
PWR MC HZ
PWR LZ1 SW GND
OUT
LZ2
AB AG BB BG
-24VDC POWER SUPPLY
FIGURE 6 - OVERRIDE A SINGLE ZONE WITH A V-9937
15 14
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
V-9939A
S
RING
M TIP
___14. Volume adjustment:
___a. During initial system set up, set the
screwdriver adjustable volume control on
the V-9939A 1/2 turn clockwise.
___b. Speak through the microphone and adjust
the screwdriver adjustable volume
controls on the V-9939A and output 1 of
the V-9937 to the desired page level.
___c. Access zone through the telephone
system; adjust input 3 volume control on
the V-9937 for the desired page level.
13 12 11 10 9 8 7 6
6
TO A ZONE OF A
PAGE CONTROL
UNIT
5 4 3 2 1
ONE-WAY
AMPLIFIED
SPEAKER
ASSEMBLIES
947939A