TM 5-6675-328-14
NOTE
If infinity reticle image of MTC is not sharp and distinct, then MTC is not properly adjusted and must be
recalibrated.
(7)
Aline AS-1 so that infinity reticle image of MTC is in vertical and horizontal register with reticle image of AS-1 to
achieve alinement adjustments provided on test post and mount supporting AS-1.
NOTE
Mark AS-1 to maintain same position on V-blocks during rotation.
(8)
Rotate AS-1 180° in its mount. Check for out-of-register condition of vertical wire images only.
NOTE
If necessary, remove paint from adjustment screw holes.
(9)
If out-of-register condition exists, use two horizontal reticle adjustment screws of AS-1 to remove one-half of the
error. Remove remaining error by using tangent screws of mount supporting AS-1.
(10)
Rotate AS-1 180° in its mount and verify adjustment. Continue rotating 180 and adjusting until vertical wires
remain in register.
(11)
Rotate AS-1 90° and, using only adjustment screws of AS-1 reticle, adjust until vertical wires are in register.
(12)
Bring both vertical and horizontal patterns into register and rotate AS-1 180 . If adjustment is complete, wires
should remain in exact register both vertically and horizontally. If they do not, rotate AS-1 90 and repeat steps (7) thru
(11) until they remain in register.
NOTE
If it is not possible to roll in reticle, position of focusing lens relative to optical-mechanical axis of telescope
has been disturbed due to mishandling. Refer to higher level maintenance.
(13)
Adjust focusing knob of AS-1 until image of 16 ft reticle of MTC becomes sharp.
(14)
Adjust AS-1 mount until two reticle images are in vertical and horizontal register.
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