TM 5-6675-270-15
3-3. Troubleshooting-Continued
Table
Probable cause
Corrective action
Malfunction
Plate level out of adjustment.
Adjust plate level (para 2-9b).
11. Platelevel bubble does not stay in
center.
a. Illumination mirror not properly
a. Adjust mirror.
12. Light on vertical and horizontal
adjusted.
circles unequal or absent.
Illumination lamp defective.
Replace lamp (para 3-9 and
b.
b.
3-10).
a. Lamp burned out.
a. Replace lamp (para 3-9 and
13. Illumination system faulty or
fails to function.
3-10).
Batteries discharged.
Replace batteries (para 3-13).
b.
b.
Release clamp.
Horizontal circle clamp locked.
14. Horizontal circle hard to move.
Reset clamp screw.
Vertical clamp screw improperly set.
15. Telescope turns too hard to too
easily.
Section V.
MAINTENANCE OF LAMPS
3-10. Installation
3-9. Removal
a. Illumination Lamp. Refer to figure 3-l and
install the illumination lamp.
remove the illumination lamp.
2-7 and install the hand light lamp.
2-7 and remove the hand light lamp.
removal and installation.
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