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
DVM indicates 0
VDC
Measure voltage between K2-X1 and
2r Connect DVM test leads to POWER
K2-X2. If less than 10V, replace K2;
SUPPLY HTR 1 and PWR RTN test jacks
if greater than 10V, replace sequence
monitor circuit card assembly A5
DVM indicates 0
VDC
Same as 2r
2s. Connect DVM test leads to POWER
SUPPLY HTR 2 and PWR RTN test jacks
If incorrect, replace power inverter
Multimeter indicates 85 to
2t. Set multimeter to AC volts and connect
115 VAC
assembly A6
test leads to POWER SUPPLY 115V /0
and PWR RTN test jacks
Multimeter indicates 100 to
Same as step 2t
2u. Connect multimeter test leads to POWER
121 VAC
SUPPLY 115V
and PWR RTN test
jacks
If incorrect, replace power inverter
Multimeter indicates 45 to
2v. Connect multimeter test leads to POWER
65 VAC
assembly A6, then C2
SUPPLY COMP BLO and PWR RTN test
jacks
Multimeter indicates 45 to
If incorrect, replace power inverter
2w . Connect multimeter test leads to POWER
65 VAC
assembly A6, then C3
SUPPLY IMU BLO and PWR RTN test
jacks
Multimeter indicates 25.5 to
If the voltage is out of tolerance,
2x. Connect multimeter test leads to POWER
replace power inverter assembly A6
28.4 VAC
SUPPLY 26V
and PWR RTN test
jacks
2y. Disconnect multimeter PSTS and press
POWER SUPPLY OFF switch; then set
MODE switch to FULL LOAD
Voltage out of tolerance; replace 28V
DVM indicates +26 to +30V
2z. Press POWER SUPPLY ON switch. Set
converter-regulator circuit card
DVM to DC volts and connect DVM to
assembly A3
POWER SUPPLY +28V and PWR RTN
test jacks
Same as step 2z
DVM indicates -24V to -28V
Press POWER SUPPLY OFF switch, set
2aa.
FUNCTION switch to -28V, press
POWER SUPPLY ON switch, and connect
DVM to POWER SUPPLY -28V and PWR
RTN test jacks
Disconnect DVM from PSTS
2ab.
Voltage out of tolerance; replace power
Set multimeter to AC volts. Press POWER Multimeter indicates 95 to
2ac.
125 VAC
inverter assembly A6
SUPPLY OFF switch, set FUNCTION
press POWER SUP-
switch to 115V
NOTE
PLY ON switch, and connect multimeter
to POWER SUPPLY 115V
and PWR
If voltage is out of tolerance,
RTN test jacks
check input power before
taking corrective action, step
2c.
4-113
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