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Page Title:
Table 7-2. Troubleshooting Communications Control Console OA-7735/G (Cont) |
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 TM 32-5895-227-14&P
Table 7-2. Troubleshooting Communications Control Console OA-7735/G - Continued
Item
Trouble symptom
Probable trouble
Corrective action
number
4
Inability to transmit
Faulty electrical connections
Check that all connectors on rear panel
and receive
are mated properly.
individual stations
Defective switches
Refer to FO-5. Check electrical
continuity and proper operation of
switches that are in inoperative mode.
Remove and replace defective switches.
Faulty electrical connections at
Check that all connectors corresponding
outstations
to inoperative stations are secure.
5
Inability to transmit
Defective amplifier board No. 1
Trouble in amplifiers may be isolated by
to all stations.
substituting suspected amplifier board
with a board that is known to be
operable.
Amplifier boards No. 1, No. 2, and No.
3 are interchangeable.
Refer to FO-5. Check continuity from
No continuity between microphone jack
J28 pin 1 to amplifier board No. 1,
J28 on OA-7735/G console and amplifier
socket K.
board No. 1
No continuity between amplifier board
Refer to FO-5. Check continuity from
and intercom switch S 1
amplifier board No. 1, socket D, to inter-
com switch S1.
Defective microphone
Substitute suspected microphone with a
microphone that is known to be
operable.
If all stations operate normally, first
microphone or its cable is defective.
6
Inability to receive
Defective amplifier board No. 2
Trouble in amplifiers may be isolated by
all stations.
substituting suspected amplifier board
with a board that is known to be
operable. Amplifier boards No. 1, No. 2
and No. 3 are interchangeable.
Defective headset
Substitute suspected headset with a
headset that is known to be operable. If
all stations operate normally, first
headset or its cable is defective.
No continuity between headset jack J28
Refer to FO-5. Check continuity from
on OA-7735/G console and amplifier
J28 pin 2 to amplifier board No. 2,
board No. 2
socket D.
No continuity between amplifier board
Refer to FO-5. Check continuity from
No. 2 and intercom switch S1
amplifier Board No. 2, socket K, to inter-
com switch S 1.
7-7
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