TM-9-1240-401-34&P Technical Manual for M109 Telescopes and Mounts Download
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TM 9-1240-401-34&P Reference designation Item DS1 DS2 DS3 E1 E2 E3 E4 J1 J2 P1 S1 Overlay assembly LED, T1-3/4 based LED, T1-3/4 based Electrical contact Electrical contact Electrical contact Electrical contact Electrical receptacle assembly Electrical receptacle connector Electrical plug connector Toggle switch Part no. 12599270-1 or 12599270-2 12360905-2 12360905-2 10553922 8202570 8262017 8262018 8215804 ML-C-39012/16-0001 MS35059-21 (9) An external source of direct current electrical power is connected to the receptacle at the upper right rear corner of the quadrant housing. A three-position, center OFF, toggle switch mounted through the bottom of the housing controls current to the branch of the circuit serving counter and level LEDs and the branch serving the extension light. The latter assembly is held by a spring clip behind the housing and connected by a wiled cord and bayonet locking connector to a receptacle at the lower, left, rear corner of the housing. Spring contacts connect electrical cables in the housing to those in the cover leading to counter and level LEDs, thus permitting removal of the cover assembly without disconnecting cables. Watertight, bayonet locking metal caps cover level LEDs and an overlay assembly containing LEDs covers the counters. Change 1 1-17