GAI-Tronics 12599-001 Hot Standby Amplifier Module - Manual (Page 10)

Pub. 42004-375A
Model 12599-001 Hot Standby Amplifier Module Page: 10 of 11
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09/05
Maintenance
The Hot Standby Amplifier Module does not contain any user serviceable parts. Do not attempt to make
any repairs to the module.
If the module requires service, contact your Regional Service Center for a return authorization number
(RA#). The module should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the module is under warranty, repairs or a replacement will be made in
accordance with GAI-Tronics’ warranty policy. Please include a written explanation of all defects to
assist our technicians in their troubleshooting efforts.
Call 800-492-1212 inside the USA or 610-777-1374 outside the USA for help identifying the Regional
Service Center closest to you.
Troubleshooting
Problem Solution
Module is damaged. Do not attempt to repair the module.
Contact GAI-Tronics service for repair or replacement of the
module in accordance with the information provided on page 10.
Module does not switch to backup
amplifier when any of the primary
amplifiers fail or are powered-
down. Check polarity of wiring between fault inputs at the module, and
the fault outputs at each amplifier. If using an amplifier equipped
with a RJ-11 fault output connector, a reversal of the cable leads
should correct the problem.
Also, be sure the amplifier fault outputs are ground (dc common)
referenced, and function as described on page 8.
Unused circuits are energized. Install a jumper across any/all unused fault inputs, as described
on page 2.
Relay switching activity can be
heard on the module and output
contacts are functioning.
But the associated LED does not
illuminate and the primary audio
lines are not switching to the
standby (back-up) amplifier.
If the module is used standalone or is the first in a cascade, set the
BRD
CNTL switch S1 to the 1ST position, as described on
page 9.
Amplifier 4 switches when
amplifier 1 fails. Likewise,
amplifier 5 switches when amplifier
2 fails, and amplifier 6 switches
when amplifier 3 fails. Be sure switches S2 through S5 are set to the 1CH position when
using single-channel (monaural) amplifiers, as described on
page 9.
Both channels of the amplifiers are
not switching simultaneously when
faulted. Be sure switches S2 through S5 are set to the 2CH position when
using dual-channel (stereo) amplifiers, as described on page 9.