ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-14. IMU Testing, Alignment, and Troubleshooting Continued
Malfunction
indication/corrective action
Normal indication
Test procedure
NOTE
TEST NUMBER X IN PROGRESS
NOTE
000000. 000000 will print out peri-
Do not move PADS again until in- odically during test to indicate the
structed to do so.
start of a subtest. The time since
start may also be printed.
If a failure occurs, the number will
be nonzero and IMU, CMP, or PSU
FAILURE will print. A set of failure.
subcodes will then be printed which
provide useful information for depot
repair of the IMU and computer.
Replace or repair the computer or
power supply as appropriate. Return
a failed IMU to depot with a copy of
the TTY printout.
2f. Type XXX XX XX.X RDY for TTY prints out:
degrees, minutes, and seconds of RDY
latitude. Leave a space between
ENTER ELEVATION: (FT) RDY
each numerical grouping
2g. Type XXX.X RDY for correct TTY prints out:
elevation in feet
RDY
ENTER DATE: (JULIAN) RDY
2h. Type XXXX RDY for correct TTY prints out:
Julian data
RDY
ENTER SER NO: (DIGITS) RDY
TTY prints out:
2i. Type correct IMU serial number TTY prints out:
in format XXXX RDY
SERIAL NO INCORRECT:
RDY
Load correct IMU alignment data
ALIGNMENT PROCEEDING
tape
IF THEODOLITE WILL NOT BE
NOTE
USED, TYPE: BYP
The theodolite is always required for
IMU calibration. If a hard IMU fail-
ure is suspected, the theodolite is
not required for diagnosis.
2j. Type BYP if theodolite will not TTY prints out:
be used
BYP
NOTE
There are 10 subtests, but one or more will be deleted depending on the use of the theodolite.
At the end of a subtest, data may be printed out. The message AT LEAST ONE OUT-OF-CAL IN TEST
NUMBER X means an out-of-tolerance parameter was recalibrated. It is not a failure message and no operator
action is required.
4-87
Change 5
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