Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-19. PS Testing and Troubleshooting – Continued
Malfunction
Test procedure
Normal indication
indication/corrective action
2bt.
2bu.
2bv.
2bw.
2bx.
Adjust 0 to +40V external power source
to +28, then to +24 (±0.5)V. Measure
power supply voltage at POWER
SUPPLY PWR IN and PWR RTN test
jacks
Set PS VEHICLE circuit breaker CB2 to
off
Set PS VEHICLE circuit breaker CB2
to on
Press POWER SUPPLY OFF switch.
Set MODE switch to BATT SIM 1A.
Set POWER SUPPLY INTERLOCK
switch to OFF. Connect DVM test
leads to POWER SUPPLY BATT and
PWR RTN test jacks
Set POWER SUPPLY INTERLOCK
switch to ON (wait approximately 14
seconds)
2by. Set MODE switch to BATT SIM 4A
2bz.
2ca.
2cb.
Connect DVM test leads to POWER
SUPPLY PWR IN and PWR RTN test
jacks
Slowly decrease +28V power source
until CHARGE indicator goes off
Set POWER SUPPLY VEHICLE SENSE
switch to OFF. Increase external +28V
power source to +28V
BATTERY indicator goes
off
BATTERY indicator lights
BATTERY indicator goes
off
DVM indicates +22 to
+25V
DVM indicates +26.9 to
+29.1V. CHARGE indi-
cator flashes on then
remains off
DVM indicates +26.9 to
+29.1V CHARGE indicator
lights
DVM indicates +24 to +25V
CHARGE indicator lights
BATTERY indicator lights: Replace
sequence monitor circuit card
assembly A5
BATTERY indicator dots not light:
Replace sequence monitor circuit card
assembly A5
If shutdown occurs, replace sequence
monitor circuit card assembly A5. If
shutdown prevails, replace diode CR3
Voltage out of tolerance: Check R4.
Replace sequence monitor circuit
card assembly A5, then battery
charger circuit card assembly A7
If voltage is within tolerance but
CHARGE indicator stays on, replace
sequence monitor circuit card
assembly A5
If voltage is out of tolerance, replace
sequence monitor circuit card
assembly A5, then battery charger
circuit card assembly A7
If voltage is within tolerance but
CHARGE indicator does not light,
replace sequence monitor circuit card
assembly A5
If voltage is out of tolerance, replace
battery charger circuit card assembly
A7, then sequence monitor circuit
card assembly A5
Same as step 2by
If CHARGE indicator does not light,
replace sequence monitor circuit card
assembly A5, then battery charger
circuit card assembly A7
Change 5
4-117