ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
card so it will not be confused with any
new replacements.
only.)
a. General. The PADS operational program must
Perform PS testing and troubleshooting in accordance
be loaded into memory after the diagnostic program has
with table 4-19. See figure 4-10 for a testing intercon-
been run. Usually, this will be after the IMU alignment.
nection diagram. See figure 4-11 for circuit card adjust-
If it is known that memory contents were altered by a
ment locations. See figures 4-19 and 4-20 for location of
problem external to the memory and the IMU calibra-
circuit cards and components. See figure 4-20, sheets 4
tion constants checksum is correct, the operational
and 6, for relay terminal locations. When the test
program may be reloaded without performing an IMU
procedure has been interrupted or aftter a repair action
alignment.
has been taken, the complete test (part 2 of table 4-19)
should be performed.
NOTE
NOTE
Do not attempt to reload the solid state
memory at this time as the operational
program already resides in the solid state
test subroutines wherever a malfunction
memory and will automatically be de-
is indicated. These test subroutines are
faulted to or activated at turnon.
independent procedures and may be per-
b. Test Equipment and Materials.
formed in any sequence. The tests most
likely to find the fauls will be listed first.
PADS test set, consisting of SPU, tape reader,
(1)
Some types of faults will prevent the first
buffer unit, interconnecting cables, and auxil-
routines from working. The operator
iary equipment.
should then choose another routine from
Teletypewriter. The 100-wpm motor-worm
(2)
the recommended list or from the total
gear must be installed prior to use. Refer to
list below. The names of the subroutines
TM 11-5815-200-12.
listed below should aid in choosing an
PADS operational program tape.
appropriate routine for the circuit area.
(3)
In the case where a component is visibly
PADS power supply, computer, pallet frame,
(4)
destroyed, it usually is productive to per-
and battery box.
form the routine that has that component
(5)
+ 28V power source.
in its list.
c. Test Procedure. Perform the test in accordance
c. PS Test Subroutines.
with table 4-18 or 4-18.1. Table 4-18 uses PADS test set
tape reader, part no. 877406-1 and table 4-18.1 uses
tape reader, part no. 877406-2.
-13d
(1) Input Power Short and 4 Continuity
a. Test Equipment and Materials.
Checks
(1) Power supply test set (PSTS)
-13e
(2) Bus Power Short and 1 Continuity
Checks
-13f
(3) Relay Checks 4
b. Procedure.
-13g
NOTE
(4) AUX 24V, and + 12V Checks 4
When circuit cards are removed during
the troubleshooting process, be sure to
note the serial number of the original
4-100
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