TM 1-1270-476-30
4-72
4-5. NIGHT SENSOR ASSEMBLY (NSA) REPAIR (cont)
10. COOLER/DEWAR ASSEMBLY A29/A30
REPLACEMENT
CAUTION
Keep lens that are exposed during this
procedure covered with lens paper to prevent
damage to coated optical surface.
NOTE
If cooler/Dewar assembly is to be removed for
not cooled malfunction, purge and recharge
cooler/Dewar assembly per TM 11-5855-294-
12&P and retest NSA.
REMOVAL
a. Remove preamplifier cover (1 above).
b. Remove scanner optics assembly A34 (1).
(1) Disconnect connector W10P3 (2) from
connector A32J1 (3) by loosening two
screwlocks (4).
(2) Remove wire harness loop clamp (5) by
removing screw (6) and washer (7).
