TM 5-6675-306-14
Table 3-2. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
THEODOLITE
1.
THEODOLITE WILL NOT SEAT PROPERLY ON TRIPOD HEAD
Step 1. Check alignment of the central fixing screw.
Restart central fixing screw (fig. 2-9).
Step 2. Inspect tribrach assembly for defects.
Replace a defective tribrach assembly (fig. 1-2).
2.
THEODOLITE WILL NOT STAY ON LINE
Step 1. Check theodolite for level.
Level theodolite:
(1) Position theodolite on tripod head and secure with central fixing (r (fig. 2-9).
(2) Center circular level bubble using footscrews (fig. 2-9).
Step 2. Plate level or collimation level out of adjustment.
a. Adjust plate level (fig. 2-15).
b. Adjust collimation level (fig. 2-16).
3.
LIGHTS ON VERTICAL AND HORIZONTAL CIRCLES UNEQUAL OR ABSENT
Step 1. Illumination lamp defective.
Replace lamp (fig. 3-2).
Step 2. Batteries defective.
Replace batteries (fig. 3-2).
4.
HORIZONTAL CIRCLE HARD TO MOVE
Circle drive knob out of adjustment.
Adjust knob (fig. 2-17).
5.
FOOTSCREWS TOO TIGHT OR LOOSE
Footscrews out of adjustment.
Adjust footscrews (fig. 2-18).
Section V. MAINTENANCE OF LAMP FITTING AND BATTERY BOX
3-7. Lamp Replacement
3-8. Battery Replacement
Refer to figure 3-2 and replace the lamps.
Refer to figure 3-2 and replace the batteries.
3-5
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