ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
Table 8-6. PADS Test Set Self- Test Procedure - Continued
Malfunction indication/
Test procedure
Normal indication
corrective action
c. 1 Press SELF TEST switch-indi-
Observe that SELF TEST switch- a. Check + 5V fuse; replace if necessary
d.
e.
f.
g.
cater to on then off
Press SPU ON switch-indicator
to off
Connect cables W203, W204,
and W209 as shown in figure
8-2
Check that tape reader SPOOL-
ING switch is set to DISABLE
Press SPU ON switch-indicator
to on
.
indicator lights and goes off, ac-
cordingly
b. Check PS2 output voltage between
W5 (+) and W6(-) for +5V
c. If + 5V is present between W5 and
W6, replace A3 then A1
d. If + 5V is not Present between WS
e.
f.
g.
h.
i.
j
and W6, check-115 VAC input be-
tween terminals 1 and 2 of PS2
If 115 VAC is not present, check K1
for being energized, S4 for being
closed, and R1. Replace if necessary
If 115 VAC is present, disconnect Z2
from PS2
Check for + 5V between terminals
W5 ( + ) and W6 (–) of PS2
If + 5V is not present, replace PS2
If + 5V is present, adjust Z2 accord-
ing to procedure 8-23f
If Z2 cannot be adjusted, replace Z2
Only one of the switch-indicators does
not go off when pressed: Check switch
that is affected for being defective
SPU ON switch-indicator goes off
SPU ON switch-indicator does not go
off: Check for faulty DS3 and shorted
wiring
SPU ON switch-indicator lights. Same as step b
IMU FAIL/COMP FAIL indi-
cator may light. ON or OFF
portion
of PADS ON/OFF
switch-indicator lights. Blower
is operating. TIME HOURS me-
ter is operating by observation
of comma oscillation
8-47
