TM 5-6675-328-14
(28)
Install AS-2 in V-blocks of mounting base on test post with objective end facing MTC.
(29)
Attach separate auxiliary lighting unit to AS-2 and plug other end into external power outlet on side of cabinet.
Turn on light.
(30)
Adjust eyepiece of AS-2 until reticle becomes sharp.
(31)
If not previously installed, place stellite mirror on adjustable mirror mount on front of MTC.
(32)
Focus AS-2 to infinity by autocollimating off mirror. Adjust focusing knob until reflected image of reticle is in
sharp focus.
(33)
Turn off light.
(34)
Remove stellite mirror.
(35)
Turn on light to MTC.
(36)
Use adjustments provided on test post and mount to aline AS-2 so that infinity reticle image of MTC is in vertical
and horizontal register with reticle image of AS-2.
NOTE
If infinity reticle image of MTC is not sharp, MTC is not properly adjusted and must be corrected before
proceeding.
(37)
Rotate AS-2 180° in its mount. Check for out-of-register condition of vertical wire images only. If out-of-register
condition exists, reticle must be adjusted.
(38)
Use two horizontal reticle adjustment screws to remove one-half of the error. Remove remaining error by using
tangent screws of mount.
(39)
Rotate AS-2 180° in its mount and verify adjustment. Continue rotating 180° and adjusting until vertical wires
remain in register.
(40)
Rotate AS-2 90° and repeat steps (38) and (39) until vertical wires are in register.
(41)
Bring both vertical and horizontal patterns into register, and again rotate AS-2 180° . If adjustment is complete,
wires should remain in exact register both vertically and horizontally. If they do not, rotate AS-2 90° and repeat steps
(36) thru (40) until they remain in register.
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