Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-6.1. Computer Diagnostic/Alignment Program Using Tape Reader, Part No. 877406-2 – Continued
Malfunction
Test procedure
Normal indication indication/corrective action
3k. Compare printed checksum to
checksum written on the front
of the PADS diagnostic align-
ment tape number 877418-5
3l. Set tape reader FAST/SLOW
switch to FAST
3m. Press REVERSE switch-indica-
tor to on
3n. Press REVERSE switch-indica-
tor to off
SELECT TEST MODE
Checksums are equal
NOTE
You may continue performing
test while the tape is rewinding.
the
If a computer test is not required:
press EXECUTE switch-indicator to
off; sequentially press PADS ON/
OFF switch-indicator and ENTER
switch to turn off computer; and go
to table 4-11 or 4-14.1 to perform a
CDU or IMU test, respectively.
REVERSE switch-indicator lights.
Tape rewinds and stops at begin-
ning of reel
REVERSE switch-indicator goes off
Checksum is incorrect: Inspect tape
reader and tape for dirt. Clean as
required
Reload complete diagnostic program
If new checksum is correct, continue
with test. If new checksum is
same as the old (wrong) check-
sum: Perform PADS test set self-
test and take indicated corrective
action
Replace computer card assemblies in
the order shown in step 2h and
reload tape after each card is re-
placed
If new checksum differs from the old
(wrong) checksum: reload tape,
Thoroughly clean or replace tape
3o. Lift tape reader read head cover
and remove tape from tape
reader
4-54.10
Change 1