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  TM 11-6730-235-35
b. Test Conditions. Connect the line plug of the
4-5. Electrical Tests
projector to the power source.
c. Procedure.
a. Test Equipment and Materials. Thermometer.
Control settings
Equipment
Performance standard
Step
Test
Test procedure
NO.
equipment
under test
a. Projection lamp shall light.
a. Observe projection lamp.
ON-OFF switch: on
None
1
b. Blown air from blower mo-
b. Place hand over rear lou-
tor shall be felt.
vers of case assembly.
c. None.
None
a Remove fresnel lens from
ON-OFF switch: off
2
case assembly.
b. None.
b. Place thermometer near
thermal switch S3 so that
it can be read through
stage glass when top plate
assembly is closed.
c. None.
c. Close top plate assembly.
a. Temperature shall not ex-
a. Observe thermometer.
ON-OFF switch: on
Thermometer
3
ceed 135° F (57° C).
a. Observe thermometer and
a. Blower motor operates
ON-OFF switch: off
4
Thermometer
until temperature drops
blower motor.
below 131°' F (54° C).
b. Test Conditions. Connect the line plug of the
4-6. Optical Tests
projector to the power source.
c. Procedure.
a. Test Equipment and Materials. None
Controls settings
Step
Performance standard
Equipment
Test procedure
Test
No.
equipment
under test
a. Image (reflection of projec-
a. Examine image reflected in
ON-OFF switch: on
None
1
tor lamp and lamp reflector
front lens of lens head as-
in lamp housing assembly)
sembly.
shall be centered in front
lens.
a. Light shall be projected
ON-OFF switch : off
a. Observe light projected on
2
None
with same intensity at four
projection surface.
comers and center of pro-
jection surface.
b. Fresnel lens center ring
b. Observe image projected
image shall be in center
on projection surface.
of projection surface; sides
of projected image shall
be parallel and shall be
straight up and down.
4-3
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