GAI-Tronics 12599-002 Hot Standby Amplifier Module - Manual (Page 16)

Pub. 42004-412A
Model 12599-002 Hot Standby Amplifier Module Page: 16 of 17
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06/08
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 15.
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 input jumper clips (J1–J12) are set to the correct
position for either wet or dry mode, based on the fault output type
produced by amplifier.
Unused circuits are energized. Set the designated input jumper clips to the dry position (as
defined on page 2) and install a jumper across any/all unused
fault inputs.
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 (backup) 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 in the
Theory of Operation section.
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 in the
Theory of Operation section.
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 as described
in the Theory of Operation section.
Amplifiers on the second
(cascaded) module operate
independently. In a cascade arrangement, switch S1 must be set to the 1ST
position at the first module, and the 2ND+ position at the second
module, and all subsequent modules, as described in the Theory
of Operation section.
Also, be sure wiring at the IN/OUT CNTL terminals at TB26
conforms to Figure 5 or Figure 6 respectively.
After performing all wiring checks,
trouble-shooting, etc. as described
in this section, the module still does
not function properly. Contact GAI-Tronics service for repair or replacement of the
module in accordance with the information provided on page 15.