Valcom V-763-W Installation Instructions page 2

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
Model V-763-W
Model V-763-GY
NOMINAL SPECIFICATIONS
Input Impedance:
Input level:
Current at -24VDC:
Dimensions:
(9.91cm H x 12.95cm W x 8.13cm
Weight:
WIRING
Make connections as shown below using standard, twisted telephone cable.
Limit the number of speakers to five (5) per 500 foot run.
Typical Connections
Tip/A
Page
Ring/B
Out
-24VDC
Gnd
Valcom Page
Control
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.
Black
White
Gray
600 Ohm nominal
-10dBm nominal
45mA
3.90" H x 5.10" W x 3.20" D
D)
.6 lbs. (.27 kg)
Ground - Black
One-Way
-24VDC - Yellow
Amplified
Tip - Green
Speaker
Ring - Red
Valcom -24VDC
Power Supply
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.
Connector Pin-Out
TROUBLESHOOTING CHART
Problems Probable Causes and Corrections
No Audio from 1. Check that volume control is turned up
Speaker (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 1. Check that volume control is turned up.
from the 2. Check voltage at the speaker when in use (-18 to -
Speaker 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 1. Lower volume of speaker.
(feedback) 2. Move speaker to location further from phone.
3. Install confidencer on phone in severe problem
area.