Figure 2-95. Transit Case-Packing and Unpacking.

TM 5-6675-250-34

white stripes on the tripod with the white stripes on

body of the instrument and tighten.

the GRU housing.

(6) While holding the equipment, loosen the

(9) Release the horizontal lock and tighten the

three locking clamps on the tripod and retract the

vertical lock on the theodolite.

tripod legs. Lock the legs in the retracted position.

Compress the legs against the GRU. If extended,

CAUTION

Exercise care when positioning the GRU in

retract the tripod spades into the legs.

the Transit Case. Incorrect positioning can

(7) Align the alidade index stripe with the

cause damage to the reference mirror.

theodolite index stripe.

(10) With the GRU and the tripod assembled,

(8) Maintain the theodolite telescope pointing

secure the equipment in the transit case with the

upward and parallel to the vertical plane, align the

Figure 2-95. Transit Case-Packing and Unpacking.

bottom section of the transit case.

b. Installation

(3) Release the clamps that secure the GRU in

(1) Press the pressure-relief valve on the transit

the case.

case to relieve internal pressure.

(4) Lift the GRU from the transit case.

(2) Unlatch and separate the lid section from the

Section V. FAILURE ANALYSIS

Circuits corresponding to the test jacks and in-

2-14. Interconnect Breakout Box

dications required during testing are reflected in

Monitoring and checkout of signals between the

table 2-93. Figure 2-97 illustrates wave forms that

ECU and the GRU are provided through the in-

should appear during applicable tests, using an

terconnect breakout box (fig. 2-96). Each pair of test

jacks on the breakout box are identified by a letter.

2-89