Specifications

6-3
Analog Optical Alignment - Projector
Inspect the lateral film guides for
evidence of cuts, cracks, surface defects,
and any foreign materials that could
impair the film guiding. Clean as
required or replace the guides, as
necessary. Make sure the guide roller
rotates freely, and if it is spring-
mounted, make sure that lateral
movement and return is not obstructed.
If the roller has a felt or rubber insert,
check for a flat spot, replace the roller if
need be.
Remove the existing exciter lamp and
replace with a new lamp.
Adjust the exciter lamp DC voltage to
70% to 85% of the rated voltage and
verify that there is no more than 3%
ripple present with the lamp on, using an
AC millivolt meter or oscilloscope.
LAMP VOLTAGE DC ADJUSTMENT
6 V 4-5 Volts
9 V 6.5-8 Volts
If the projector uses a plastic light pipe
or tube, verify that the light output is not
appreciably affected by dirt, cracks or
flaws, yellowing, or foreign matter.
Replace if necessary.