Install guide

ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-14.1. IMU Testing, Alignment, and Troubleshooting Using Tape
Reader, Part No. 877406-2 - Continued
Malfunction
Test procedure
Normal indication
indication/corrective action
1i.
Lift tape reader read head cover;
install IMU alignment data tape,
for IMU being tested, on tape
reader. Tape is located in stor-
age container on IMU connector
2J2. Be careful not to tangle the
coiled tape. Gently lower read
head cover
No. 10 LED indicator lights steady
Ensure that tape reader FAST/
SLOW switch is set to SLOW
1j.
1k.
MEMORY LOAD switch-indicator
lights. Tape reader reads tape and
stops at end of tape
Tape stops in middle or does not stop
at end Rewind tape and reload.
Make sure tension is applied to
the front of the tape to ensure the
sprocket wheel is properly engaged
Press MEMORY LOAD switch-
indicator to on
MEMORY LOAD switch-indicator
goes off
1l.
1m.
1n.
Press MEMORY LOAD switch-
indicator to off
Deleted
Press REVERSE switch-
indicator to on
REVERSE switch-indicator lights.
Tape rewinds and stops near
beginning
REVERSE switch-indicator goes off
Press REVERSE switch-
indicator to off
Press VERIFY switch-indicator
to check tape against memory
contents
1o.
1p.
Tape does not stop at end: Rewind
tape and verify
Tape stops before end and VERIFY
ERROR indicator lights: Rewind
tape, reload and verify
VERIFY switch-indicator lights. Tape
reader reads tape and stops at end
of tape
VERIFY switch-indicator goes off
Press VERIFY switch-indicator
to off
1q.
1r. Lift tape reader read head cover
and remove tape from tape
reader and store in container on
IMU connector 2J2
PADS ON/OFF switch-indicator goes
off
PADS turn off
1s. Press PADS ON/OFF switch-
indicator, then ENTER
Set PS BATTERY and VEHI-
CLE circuit breakers CB1 and
CB2 to OFF. Set TTY MOTOR
Switch to OFF
1t.
SPU ON switch-indicator goes off
Press SPU ON switch-indicator
to OFF
Change 7
4-90.3