VALCOM ONE-WAY AMPLIFIED DESK SPEAKER
Valcom Desk Speaker, V-763, is self-amplified and may be used to provide paging
from any one-way or talkback page control. The volume may be adjusted with the
knob on the front of the housing. The V-763 requires -24VDC, 50mA (1 Valcom
power unit).
Model V-763-BK
Black
Model V-763-W
White
Model V-763-GY
Gray
NOMINAL SPECIFICATIONS
Input Impedance:
600 Ohm nominal
Input level:
-10dBm nominal
Current at -24VDC:
45mA
Dimensions:
3.90" H x 5.10" W x 3.20" D
(9.91cm H x 12.95cm W x 8.13cm D)
Weight:
.6 lbs. (.27 kg)
WIRING
Make connections as shown below using standard, twisted telephone cable. Limit the
number of speakers to five (5) per 500 foot run.
NOTE: Do not connect this speaker directly to 25/70/100V amplifier
as damage to both the amplifier and speaker may occur. A V-1095
may be used to allow the use of Valcom self-amplified speakers on
70V speaker lines.
MOUNTING
The V-763 can be used on a desk or wall mounted. The front cover may be rotated
to match positioning. Four rubber feet are included with the V-763 to prevent
movement on a desk surface.
Key hole patterns are located on the inside rear surface of the enclosure for wall
mounting. When wall mounting, remove the front cover, mount and replace the front
cover. Use a 11/32" drill bit to drill the center hole and a 3/16" bit to drill either of
the outer holes.
TROUBLESHOOTING CHART
Problems
Probable Causes and Corrections
No Audio from
Speaker
1.
Check that volume control is turned up (Clockwise).
2.
Using a lineman’s test set, check for the proper audio
level on the Tip/A & Ring/B leads, and if necessary at
the source.
Low Volume from
the Speaker
1.
Check that volume control is turned up.
2.
Check voltage at the speaker when in use (-18 to -24
VDC required).
3.
Using a lineman’s test set, check for proper audio level
on the Tip/A & Ring/B leads. It is possible some low
level audio will be heard with only one side of Tip/A
and Ring/B connected.
Loud Squeal
(feedback)
1.
Lower volume of speaker.
2.
Move speaker to location further from phone.
3.
Install confidencer on phone in severe problem area.
Valcom Page
Control
Page
Out
One-Way
Amplified
Speaker
Tip/A
Ring/B
-24VDC
Gnd
Valcom -24VDC
Power Supply
Ground
-24VDC
Tip
Ring
- Black
- Yellow
- Green
- Red
Typical Connections
