ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-19. PS Testing and Troubleshooting Continued
Malfunction
Normal indication
indication/corrective action
Test procedure
2bd. Set FUNCTION switch to PS 115V
PS FAIL fault indicator DS2
2be. Set POWER SUPPLY FLAG switch to
RESET
goes black
OVERLOAD FAIL indicator lights:
PS ON indicator goes off
2bf. Press INITIATE switch
PS FAIL fault indicator
Replace power inverter assembly A6,
then sequence monitor circuit card
DS2 goes white
assembly AS
2bg. Set FUNCTION switch to PS AMB
PWR and MODE switch to OVERVOLT
2bh. Press POWER SUPPLY ON switch
PS ON indicator lights
2bi. Set POWER SUPPLY FLAG switch to
PS FAIL fault indicator DS2
RESET
goes black
2bj. Press INITIATE switch
PS ON indicator goes off
OVERLOAD FAIL indicator lights:
PS FAIL fault indicator
Replace sequence monitor circuit
DS2 goes white
card assembly A5
2bk. Press POWER SUPPLY ON switch
PS ON indicator lights
2bl. Momentarily set POWER SUPPLY FLAG
PS FAIL fault indicator DS2
Same as step 2ax
switch to RESET
goes black
PS ON indicator remains on: Replace
PS ON indicator goes off
2bm. Momentarily set POWER SUPPLY IMU
OVERTEMP switch to ON
PS FAIL fault indicator
sequence monitor circuit card
assembly A5
DS2 goes white
2bn. Set MODE switch to NO LOAD
2bo. Press POWER SUPPLY ON switch
Indicator(s) does not light: Replace
CHARGE and BATTERY
indicators do not light
sequence monitor circuit card
assembly A5
PS FAIL fault indicator DS2
2bp. Set POWER SUPPLY FLAG switch to
RESET
goes black
2bq. Set POWER SUPPLY INTER LOCK
BATTERY indicator lights
Battery indicator does not light:
switch to OFF
Replace sequence monitor circuit card
assembly A5
2br. Set POWER SUPPLY INTER LOCK
BATTERY indicator goes off
switch to ON
2bs. Adjust 0 to +40V external power source
BATTERY indicator flashes
BATTERY indicator does not flash off
to +19.0 (0.5)V. Measure power supply
and on: Replace sequence monitor
on and off
voltage at POWER SUPPLY PWR IN and
circuit card assembly A5
PWR RTN test jacks
4-116
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