Valcom V-764 Installation Instructions page 2

VALCOM TALKBACK DESK SPEAKER WITH CALL BUTTON
The V-764, Valcom Desk Speaker, is a 45 Ohm talkback speaker with call button
designed to be used with Valcom "handsfree" talkback control units. The volume
may be adjusted with the knob on the front of the housing. The V-764 requires no
additional power.
Model V-764-BK
Model V-764-W
Model V-764-GY
WIRING
Connections are accomplished via an RJ11C connector. A 7 ft. silver satin modular
cord is supplied to accomplish these connections.
Cable runs should be limited to 800 foot maximum from the talkback control unit
using Cat 3 or 5, twisted telephone cable.
Typical Connection
DIMENSIONS/WEIGHT
Dimensions:
Weight:
Black
White
Gray
3.9"H x 5.1"W x 3.2"D
(9.9cm H x 12.9cmW x 8.1cmD)
.7 lbs. (.32 kg)
MOUNTING
The V-764 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-764 to
restrict 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.
OPERATION
Adjust the V-764 volume control to ½ rotation. Adjust transmit/receive
controls on the talkback control, then fine tune the volume control on the
speaker as needed. Typical adjustment of receive volume control is 1/3
rotation and transmit volume control is 2/3 rotation.
NOTE: Adjustment of the volume control raises and lowers the reply voice
level when the page control is in the receive mode. The V-764 will not
increase the transmit or receive level beyond the setting on the page control
unit.
TROUBLESHOOTING CHART
Problems Probable Causes and Corrections
No Sound 1. Check that volume control is turned up.
2. Using a lineman's test set, check for the proper audio level
on the T & R leads, and if necessary also at the source.
Low Volume 1. Check that volume control is turned up.
2. Using a lineman's test set, check for the proper audio level
on the T & R leads, and if necessary also at the source.
Loud Squeal 1. Lower volume of speaker.
(feedback) 2. Aim speaker in different direction.
3. Move speaker to location further from phone.
4. Install confidencer on phone in severe problem area.