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  TM 11-6730-235-35
c. Procedure (Continued)
Control settings.
Step
Test
Equipment
Test procedure
Performance standard
NO.
under test
equipment
3
Controls may be in
a. Operate focus knobs to
None
a. Movement shall be smooth
move focusing arm holster
any position.
with no slipping of focus
to upper and lower ex-
knobs on their shafts and
tremes of travel.
no catching of pinion gear
on rack of arm and post
assembly; travel shall not
bring focusing arm holster
past either limit stop.
b. Move lens head assembly
b. Lens head assembly shall
about its pivot point.
pivot smoothly without
binding or stopping.
4
c. Examine lenses on lens
None
Controls may be in
a. Lenses shall not be
any position.
head assembly.
chipped, cracked, broken,
fogged, or dirty.
b. Examine mirror in lens
b. Mirror shall be clean with
head assembly by looking
no chips, cracks, breaks, or
through front lens.
unsilvered portions visible.
c. Examine stage glass and
c. Stage glass and fresnel lens
fresnel lens of top plate
shall be clean, with no
assembly.
chips, cracks, breaks, or
fogging.
5
None
Controls may be in
a. Check spring lock button
a. Spring lock button shall
any position.
on case assembly.
secure top plate assembly
in closed position; shall
operate to release top plate
assembly.
b. Release top plate assembly
b. Top plate assembly hinge
and swing upward.
shall operate smoothly
without binding and shall
be locked in open position
by interlock arm.
c. Press bottom of interlock
c. Interlock arm shall release
arm toward front of case
top plate assembly, per-
assembly.
mitting it to close.
d. Press down on top plate
d. Spring lock button shah
assembly.
secure top plate assembly
by latching hole in top
plate assembly.
6
None
Controls may be in
a. Release top plate assembly
a. None
any position.
and swing upward.
b. Bulb shall loosen in socket
b. Operate bulb eject lever.
so that it can be lifted out
easily.
c. Bulb shall seat securely in
c. Return bulb.
its socket.
d. Release interlock arm and
d. None.
close top plate assembly.
4-2
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