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Page Title:
Table 4-18. TROUBLESHOOTING CHART |
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|  TM 11-5895-1141-34
Table 4-18. TROUBLESHOOTING CHART
Item
Fault
Check/Corrective Action
General
1
Equipment inoperative,
Fuse F1201 is open. Isolate
fuseholder lamp is lit.
cause of overload to particular module. Pull
connectors J106, J107, J108 and J102.Replace
F1201 and then reconnect the connectors in
sequence until the fuse blows and the offending
module is isolated. Trace the +24 v bus in that
module until the "short" is located.
2
Equipment inoperative. No
a. Does DSLO1 the POWER ON
transmit or receive func-
indicator light on closing
tion.
switch S101?. If not, check connector J105 for
loose connection to P105. Also check for
presence of +24 v from Dower source or a
defective S101.
b. If DS101 lights, then check connectors P301
and J101 for proper mating. Also check J102
and P204 for proper mating.
Lamp Monitors
3
No indicator lamps operate
a. Check for presence of
in selector module.
unfiltered +24 v in selector
DS101 lit.
module.
b. Check for open Q1007 in
selector module.
4
Indicator lamps light but
Check for shorted Q1205 for
brightness cannot be
microphone amp/lamp bright-
controlled.
ness module.
4-50
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