Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
4-12. Operational Program Loading. (Core memory
only.)
a. General. The PADS operational program must
be loaded into memory after the diagnostic program has
been run. Usually, this will be after the IMU alignment.
If it is known that memory contents were altered by a
problem external to the memory and the IMU calibra-
tion constants checksum is correct, the operational
program may be reloaded without performing an
alignment.
NOTE
Do not attempt to reload the solid state
memory at this time as the operational
program already resides in the solid state
memory and will automatically be de-
faulted to or activated at turnon.
b. Test Equipment and Materials.
(1)
(2)
(3)
(4)
(5)
IMU
PADS test set, consisting of SPU, tape reader,
buffer unit, interconnecting cables, and auxil-
iary equipment.
Teletypewriter. The 100-wpm motor-worm
gear must be installed prior to use. Refer to
TM 11-5815-200-12.
PADS operational program tape.
PADS power supply, computer, pallet frame,
and battery box.
+ 28V power source.
c. Test Procedure. Perform the test in accordance
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.
4-13. Power Supply Testing and Troubleshooting.
a. Test Equipment and Materials.
(1) Power supply test set (PSTS)
(2) Digital Voltmeter AN/GSM-64B
(3) Multimeter AN/USM-223
b. Procedure.
NOTE
When circuit cards are removed during
the troubleshooting process, be sure to
note the serial number of the original
card so it will not be confused with any
new replacements.
Perform PS testing and troubleshooting in accordance
with table 4-19. See figure 4-10 for a testing intercon-
nection diagram. See figure 4-11 for circuit card adjust-
ment locations. See figures 4-19 and 4-20 for location of
circuit cards and components. See figure 4-20, sheets 4
and 6, for relay terminal locations. When the test
procedure has been interrupted or aftter a repair action
has been taken, the complete test (part 2 of table 4-19)
should be performed.
NOTE
Table 4-19 calls for performing various
test subroutines wherever a malfunction
is indicated. These test subroutines are
independent procedures and may be per-
formed in any sequence. The tests most
likely to find the fauls will be listed first.
Some types of faults will prevent the first
routines from working. The operator
should then choose another routine from
the recommended list or from the total
list below. The names of the subroutines
listed below should aid in choosing an
appropriate routine for the circuit area.
In the case where a component is visibly
destroyed, it usually is productive to per-
form the routine that has that component
in its list.
c. PS Test Subroutines.
(1) Input Power Short and 4 Continuity
Checks
(2) Bus Power Short and 1 Continuity
Checks
(3) Relay Checks 4
(4) AUX 24V, and + 12V Checks 4
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