DESCRIPTION OF NIGHTSIDE TEST BENCH 2A3 (cont)

CROSS REFERENCE TO REPLACEMENT PROCEDURE (cont) - TM-11-6625-3081-23-1_164

PNEUMATIC CONTROL PANEL - TM-11-6625-3081-23-1_166

TM-11-6625-3081-23-1 Electronic Equipment Test Facility TADS/PNVS Augmentation Equipment Manual
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TM 11-6625-3081-23 1-14. DESCRIPTION OF NIGHTSIDE TEST BENCH 2A3 (cont) 1-14 (3) The shutter assembly 2A3A1A2 is mounted on the front side of the nightside optical assembly adjacent to the sensor mount assembly 2A3A1A3. The shutter assembly consists of a shutter assembly housing, eight shutter vanes, cable assembly W7 (cable with optical switch assembly attached), cable assembly W8 (cable with shutter solenoid attached) and electrical connector plate assembly. A dust cover is placed over the shutter assembly whenever a UUT is not installed. The purpose of the shutter assembly is to remain open during UUT operation and closed for protection of the nightside test bench mirror assemblies when a UUT is not operating. (4) The sensor mount assembly 2A3A1A3 is a heavy, cast aluminum mount that supports and positions the night sensor assembly UUT for testing. It is mounted to the front side of the nightside test bench and primarily consists of a mounting base plate, handle assembly, sensor mount bracket assembly, and W1O cable assembly. The handle assembly locks the UUT to the sensor mount assembly. The W1O cable assembly contains two optical switch assemblies Al and A2 that sense the lock and unlock condi- tion of the handle assembly. (5) The connector bracket assemblies (2A3A1A15 and 2A3A1A16) are two separate cable entry panels. These panels interface the cabling coming from cable entry panel 2A3A4 and the internal cabling of the nightside optical assembly. (6) The secondary heat source assembly 2A3A1A17 is positioned inside the night- side optical assembly below the upper mirror assembly. It primarily consists of a 1.5 inch heat source (heat source “C”), fold mirror housing assembly, air outlet duct assembly, and microcircuit and heat sink assembly. The latter assembly threads into the plate of the heat source “C”. The microcircuit and heat sink assembly consist of a cable assembly wired to a temperature sensor mounted inside a heat sink. Heat source “C” contains a 1.5 inch square radiating surface controlled to an accuracy of 1.O°C incremental steps. A fan is contained inside the heat source “C”. (7) Cable assemblies 2A3A1W5 and W6 contain all the connectors for interfacing the assemblies contained in the nightside optical assembly. W5 contains connectors P4, P5, and J1 thru J5. W6 contains one wired in temperature sensor, connectors J1 thru J4, and P1 thru P15. 1-91

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