TM 11-6625-2440-12
Seq
Symptom
Corrective action
No.
b. Primary power circuitry faulty. ................. b. Refer to higher category of main-
b. Voltage indicated for PLAT-
FORM SCAN switch position
tenance.
1, 2, or 3 is not in proper
phase or is out of tolerance.
3
Voltage indicated is out of tole-
26 v, 400-Hz circuitry faulty ......................... Refer to higher category of maintenance.
rance
4
a. 28 VDC indicator does not light
a. Lamp burned out..................................... a. Replace lamp (para 4-20).
b. TEST SET indicator lights
b. Power supply 1A1PS1 faulty................... b. Replace power supply 1A1PS1 (para 4-19).
c. C-D ELAPSED TIME meter
c. Power supply 1A1PS1 faulty ................... c. Perform procedure in sequence No.
fails to run and 115 VAC in
dicator does not light.
d. Lamp burned out..................................... d. Replace lamp (para 4-20).
d. 115 VAC indicator does not
light.
e. ELAPSED TIME meter fails to
e. ELAPSED TIME meter faulty .................. e. Refer to higher category of main-
run.
tenance.
f. SELF TEST indicator does not
f. Lamp burned out or circuit card ............... f. Replace lamp (para 4-20). If this
light.
1A1A3, 1A1A2, or 1A1A1
fails to correct the trouble, replace
faulty.
circuit cards in the following order
until faulty circuit card is located:
1A1A3, 1A1A2, 1A1A1 (para 4-18).
5
a. Voltage for TEST SET SCAN
a. Circuit card 2A1A16 faulty ...................... a. Replace circuit card 2A1A16 (para 4-18).
switch position 1, 2, or 3 is
indicated on scope but not DVM.
b. Voltage indicated for TEST
b. Power supply 1A1PS1 faulty................... b. Replace power supply 1A1PS1 (para 4-19).
SET SCAN switch position
1, 2, or 3 is out of tolerance.
6
a. PLATFORM, MONITOR,
a. Lamp burned out or circuit card
a. Replace lamp (para 4-20). If this
OVERTEMP, MAG HDG
1A1A3 faulty.
fails to correct the trouble, replace
SERVO, or GSP TEST
rcircuit card 1A1A3 (para 4-18).
indicator does not light.
b. CAGE, LEVEL, GC1, GC2,
b. Lamp burned out or circuit card
b. Replace lamp (para 4-20). If this
or COARSE HEATER indi-
1A1A3 or 1A1A2 faulty.
fails to correct the trouble, replace
If trouble is still present, replace
circuit card 1A1A3 (para 4-18).
c. PLATF PWR indicator does
c. Lamp burned out or circuit card
c. Replace lamp (para 4-20). If this
not light.
1A1A3, 1A1A2, or 1A1A1
fails to correct the trouble, replace
faulty
circuit cards in the following order
until faulty circuit card is located:
1A1A3, 1A1A2, 1A1A1 (para 4-18).
7
a. PLATFORM, MONITOR,
a. Circuit card 1A1AS faulty ........................ a. Replace circuit card 1A1A3 (para 4-18).
OVERTEMP, MAG HDG
SERVO, or GSP TEST indicator
light does not go out.
b. CAGE, LEVEL, GC1, or
b. Circuit card 1A1A3, 1A1A2, or
b. Replace circuit cards in the following
GC2 indicator does not go out. 2A1A10 faulty
order until faulty circuit card is located:
1A1A3, lAlA2, 2AlA10 (para 4-18).
c. COARSE HEATER indicator
c. Circuit card 1A1A2 or 1A1A3
c. Replace circuit card 1A1A2 (para 4-18).
does not go out.
Faulty
If this fails to correct the trouble,
replace circuit card 1A1A3 para 4-18).
d. PLATF PWR indicator does
d. Circuit card 1A1A2, 1A1A1, or
d. Replace circuit cards in the following
not go out.
1A1A3 faulty.
order until faulty circuit card is
located: 1A1A2, 1A1A1, 1A1A3,
4-4
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