ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
Table 8-6.1. PADS Test Set Self-Test Procedure Using Tape Reader, Part No. 877406-2 - Continued
Malfunction
Test procedure
Normal indication
indication/corrective action
d. Press SELF TEST switch-indica- Observe that SELF TEST switch-
C. If + 5V is present between W5
e.
f.
g.
h.
tor to on, then off
indicator lights and goes off, ac-
and W6, replace A3 then A1
cordingly
d. If + 5V is not present between
W5 and W6, check 115 VAC in-
put between terminals 1 and 2 of
PS2
e. If 115 VAC is not present, check
K1 for being energized, S4 for
being closed, and R1. Replace if
necessary
f. If 115 VAC is present, disconnect
Z1 from PS2
g. Check for + 5V between termi-
nals W5( + ) and W6(-) of PS2
h. If + 5V is not present, replace
PS2
i. If + 5V is present, adjust Z2 ac-
cording to procedure 8-23f
j. 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
Press SPU ON switch-indicator to SPU ON switch-indicator goes off
SPU ON switch-indicator does not
off
Connect cables W203, W204, and
W209 as shown in figure 8-2
Ensure that tape reader SPL/
LOOP switch is set to LOOP
Press SPU ON switch-indicator to SPU ON switch-indicator
on
IMU FAIL/COMP FAIL
tor mav light. ON or OFF
go off: Check for faulty DS3 and
shorted wiring
lights. Same as step b
indica-
portion
of PADS ON/OFF switch-indica-
tor lights. Blower is operating.
TIME HOURS meter is operating
by observation of comma oscilla-
tion
Change 1
8-54.3
