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Page Title:
Table 2-2. System Troubleshooting Chart (continued) |
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|  TM11-5830-263-20&P
Table 2-2. System Troubleshooting Chart (continued)
Test Number
Symptom
Probable Causes
Corrective Measures
14
FFCS operates
Defective FFCS
Replace defective FFCS.
incorrectly based on
WORK, MONITOR,
VOLUME, and/or
INTERCOM switch
settings.
15
Field Lines not heard on a. Field wire cable not
See figure 2-48.
intercom.
properly connected.
b. Defective field wire.
c. Defective MCS.
16
Intercom not heard at
Defective MCS.
Replace defective MCS.
remote end of field lines
when LINES switch is
ON.
17
Vehicle alarms not heard a. Defective alarm
See figure 2-49.
on intercom.
generation equipment.
b. Defective alarm cable.
c. Defective MCS.
18
No loudspeaker
a. Defective loudspeaker
See figure 2-50.
monitoring when
cable.
LOUDSPEAKER switch
b. Defective loudspeaker.
ON MCS is set to INT or c. Defective MCS.
RADIO.
19
Loudspeaker output
Defective MCS.
Replace defective MCS.
heard when
LOUDSPEAKER switch
on the MCS is set to
OFF.
20
Problem in headset.
a. Defective earcup
See figure 2-51.
assemblies.
b. Defective microphone
assembly.
2-44
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