TM 11-6625-1696-12
b. Troubleshooting
Item No.
symptom
Probable cause
Checks and Corrective measure
14
SYNTHESIZER section On
Defective lamp .............................
Check lamp, replace as necessary
indicator does not light.
15
AMPLFREQMULTIPLIER
section SYNC indicator lights.
b. Defective synthesizer...............
16
S12 OSC meter indication abnormal
Defective synthesizer....................
Replace synthesizer (para 5-12).
17
S12 DBLR meter indication abnormal
Defective amplifier-frequency .......
Replace amplifier-frequency multi-
multiplier.
plier (para 5-13).
TEST FACILITY, RECEIVER
TS-2867(V)2/GRM-95(V)2
18
AC,-12 V, +12 V, or +26 V
Defective lamp(s) .........................
Check lamp(s); replace if nec-
indicator does not light; power
essary (para 4-6a).
supply metering normal.
Replace power supply (para 5-26c).
19
Power supply metering abnormal
Defective power supply sub- .........
assembly.
20
MODEM metering abnormal
Defective modem .........................
Replace modem (para 5-20).
21
POWER SUPPLY section in-
Defective lamp .............................
Check lamp; replace if necessary
dicator does not light.
a. Defective lamp ........................
a. Check lamp; replace if necessary
22
RADIO FREQ TUNER section
(para 4-6a).
SYNC indicator does not light.
b. Defective synthesizer...............
23
SYNTHESIZER section in-
Defective lamp .............................
Check lamp, replace as necessary
dicator does not light
24
SYNC indicator lights....................
b. Defective synthesizer...............
25
S6 OSC metering abnormal..........
Defective synthesizer....................
Replace synthesizer (para 5-21).
26
S6 DBLR metering abnormal ........
Defective amplifier-frequency multi-
Replace amplifier-frequency multi-
plier.
plier (para 5-25).
27
ELECTRONIC SWITCH mete ring
a. Defective power supply ...........
Replace power supply (para 5-24).
abnormal.
b. Defective dummy load assembly
b. Replace dummy load assembly
28
ALARM TEST indicator does not...
Defective lamp .............................
Check lamp, replace as necessary
light.
RF MODULES FACILITY
TS-3837(V)2/GRM-95(V)2
29
SUPPLY indicator does not light ...
Defective lamp .............................
Check lamp, replace if necessary.
a. Defective circuit card assembly
a. Replace circuit card assembly
30
Abnormal meter indications ..........
No. 1.
No. 1 (para 5-27).
b. Defective heat sink component
b. Replace heat sink component
assembly.
assembly (para 5-28).
31
12 V indicator does not light........
Defective lamp .............................
Check lamp, replace if necessary.
32
Abnormal meter indications ..........
Defective switch S7 ......................
Higher category maintenance
required.
a. Defective lamp ........................
a. Check lamps and replace as
33
DRIVER FIL or OUTPUT FIL ........
lamp does not illuminate. ..........
...........................................
necessary.
b. Defective voltage regulator ......
34
600 V lamp does not illuminate,....
Defective circuit card assembly ....
Replace circuit card assembly No. 2
M1 on transmitter test facility
No. 2.
indication abnormal.
35
Power meter indication abnormal..
Defective bandpass filter ..............
Replace bandpass filter (para 5-31).
36
12 V lamp does not illuminate
Defective lamp .............................
Check lamp, replace if necessary.
37
Abnormal meter indications ..........
Defective switch S11 ....................
Higher category maintenance
required.
a. Defective IF. Amplifier ............
38
Abnormal power meter indication..
b. Defective circuit card assembly
b. Replace circuit card assembly
No. 3.
No. 3 (para 5-33).
39
+ 28 V lamp does not illuminate....
Defective lamp .............................
Check lamp, replace if necessary.
40
Abnormal meter indication ............
Defective switch S13 ....................
Higher category maintenance re-
quired.
5-12
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