3
OPERATION
General
The V-9945A is a horn speaker containing circuitry to
generate single and dual electronic tones, as well as a
5 Watt amplifier and volume control. It also contains
a timer to interrupt the warble tone signal (1 second
on, 5 seconds off). When the red and green leads are
connected together (Through a contact closure), the
warble tone and interrupter circuits are activated.
When the brown and green leads are connected, the
circuitry for the single tone is activated. If both
closures are applied, the single tone will be sent.
TECHNICAL ASSISTANCE
When trouble is reported, verify that power is being
supplied to the unit and there are no broken
connections. Check voltages for proper polarity on
the crossconnect block.
A lineman's test set, several clip leads and a VOM
may be necessary to effectively troubleshoot the unit
.
Table 1 identifies symptoms of some possible
problems with solutions. If your problem is listed,
perform the actions indicated.
If the trouble has not been located, continue to
troubleshoot by substitutin g a spare unit for the
suspected unit.
Assistance in troubleshooting is available from the
factory. When calling, you should have a VOM and a
test set available and be calling from the job site. Call
(540) 563-2000 and ask for Technical Support or call
(540) 767-1555 for Valcom 24-hour Faxback System or
visit our website at http://www.valcom.com.
Valcom equipment is not field repairable. Valcom, Inc.
maintains service facilities in Roanoke, VA. Should
repairs be necessary, attach a tag to the unit cle arly
stating your company name, address, phone number,
contact person and the nature of the problem. Send
the unit to:
Valcom, Inc.
Repair and Return Dept.
5614 Hollins Road
Roanoke, VA 24019-5056
Table 1 - Troubleshooting Chart
1. No output.
A. Verify -24 Volts on white lead and ground (+)
on black lead.
B. Verify volume control turned up (Clockwise).
C. Try shorting red and green or brown and green
at horn and listen for output.
