TM-9-1240-400-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-400-34&P 19 Install reflecting mirror assembly (15) on adapter fixture (6) making certain that keyway is firmly seated against locating pins. 20 Remove light source (16) from projector collimator (10). 21 Unscrew and remove frosted glass (17) from eyepiece end of projector collimator (10). 22 Set projector collimator objective cell assembly to infinity. 23 Look through and focus projector collimator (10). 24 Tilt in both elevation and depression, using holder screw (18), until the test reticle is reflected in the reflecting mirror assembly (15) and is superimposed upon itself. NOTE Make sure mirror assembly does not move away from pins. 25 If reflected image is not superimposed in azimuth, slightly shift adapter fixture (6) to correct. 2-61