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
2b. Compare printed checksum
written on the front of the
punched tape in use
2c. Type IMU to select IMU auto-
matic alignment and test se-
quence
2d. Verify that the printed serial
number matches the’ serial num-
her of the IMU under test and
the checksum matches the
checksum on the IMU alignment
data tape
2e. Type RDY when 45° (±10°)
heading request has been com-
pleted
SELECT TEST MODE
Checksums are equal
TTY prints out:
IMU
SER NO XXXX
DATE XXXX
CHECKSUM XXXXXX
MOVE IMU TO APPROX 45 DEC
HEADING
WHEN DONE TYPE: RDY
Data matches
TTY prints out:
RDY
ENTER LATITUDE: (DEG) (MIN)
(SEC) RDY
Checksum is incorrect Refer to step 3k
of table 4-6.1 or step 2V of table
4-6.3
NOTE
From this step forward, the TTY
may print out any of the malfunction
messages listed in table 4-17, Take
the corrective action shown in table
4-17.
Reload IMU alignment data tape
NOTE
The program will accept all data on
one line, thus if the operator makes
a mistake prior to typing RDY while
entering data via the TN, he should
hit the carriage return key and reen-
ter the data. If the diagnostic pro-
gram does not recognize the entry as
valid, the TTY prints out: IM-
PROPER DATA ENTRY. The oper-
ator should reenter the data.
4-90.6
Change 7