ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
Table 8-6. PADS Test Set Self- Test Procedure
Malfunction indication/
Test procedure
Normal indication
corrective action
NOTE
This procedure uses tape reader,
part no, 877406-1.
a. Check that cable W201 is con-
nected as shown in figure 8-2
b. Press SPU ON switch-indicator
to on
SPU ON switch-indicator lights.
OFF or ON portion of PADS
ON/OFF
lights, Blower is operating.
TIME HOURS meter is operat-
ing by observation of comma
oscillation
c. Turn off any lighted switch-in-
dicator, other than SPU ON or
PADS ON/OFF, by pressing
them
Any
switch-indicator
that
is
lighted will go off when pressed
115 VAC can be lethal. Use extreme
care when measuring.
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
Check + 28V fuse and replace if de-
fective
Verify the 115-VAC primary power is
properly connected and present be-
tween W 1 and W2
Check if 115 VAC is present at termi-
nals 1 and 2 of PS1
If 115 VAC is not present, check R2,
DS3 and input power wiring and re-
pair as necessary
If 115 VAC is present, check for
+ 28V between terminals 4(+) and 5
(-) of PSl
If + 28V is present between terminals
4 and 5 of PS1, check wiring between
terminals 4 and 5 of PS1 and W3 and
W4
If + 28V is not present between ter-
minals 4 and 5 of PS1, disconnect Z1
from PS1
Recheck + 28V between terminals 4
and 5 of PS1
If + 28V is present between terminals
4 and 5 of PS1, adjust Z1 according to
procedure 8-23e
If Z1 cannot be adjusted, replace Z1
If + 28V is not present at terminals 4
and 5 of PS1, replace PS1
No lighted switch-indicator goes off
when pressed:
8-46
Change 1
