TM5-6675-326-14
2-19.7 Adjust Z-Axis Chain - Continued
f .
g .
h.
i .
j .
k .
l .
Move optical mount from upper limits to lower limits and
observe chain movement. If chain jumps sprockets, it is too
loose. If optical mount does not move smoothly, chain is too
t i g h t .
Readjust, if necessary.
Mount stereoscope.
Use Z-axis coarse feed knob to move optical mount up and down.
Observe movement.
Remove stereoscope before readjusting chain. Weight
of stereoscope may cuase mount to drop and damage
viewing stages.
Remove stereoscope.
CAUTION
Readjust chain, if necessary.
Turn power ON.
2-19.8 Replace Dimmer Circuit Card
PERSONNEL REQUIRED: 1 Topographic instrument repair specialist MOS 41B
TOOLS: 5/32-in. offset flat-tip screwdriver
9/64-in. flat-tip screwdriver.
MATERIALS/PARTS: Heat sink compound, item 18, appendix E
Dimmer circuit card
2-64
