Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-6. Computer Diagnostic/Alignment Program — 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. Press REVERSE switch-indicator
to on
3m. Press REVERSE switch-indica-
tor to off
3n. Set tape reader SPOOLING
switch to DISABLE
3o. Remove tape from tape reader
Checksums are equal
NOTE
You may continue performing the
test while the tape is rewinding.
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 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 photocell assembly 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: Adjust tape
reader and reload tape. Thor-
oughly clean or replace tape
Change 1
4-54.1