Installation manual

Dolby
®
Model CP650 Installation Manual A-Chain Alignment
5-6
Saving Changes.....
...
OK
Press the OK button to save the level settings
for Projector 2, Left and Right channels.
5.5 Film-Path Alignment Check
Mic Bypass
Video
Clamp
Ch 1
Ch 2
GND
RTA1 RTA2
123 7456 8
SIGNAL
PRESENT
Lt
Rt
Lt Rt
Oscilloscope
Connect the oscilloscope to the Lt and Rt test
points.
Proj 1
Thread and play a SMPTE Buzz Track test
film. This film has modulation just beyond the
normally scanned areas of the optical sound
tracks. The objective of this test is to ensure
that the slit illuminates only the soundtracks.
The method of positioning the slit relative to
the optical tracks varies with the design of
projector installed. In many cases, the film
guide is adjusted laterally for a null if the lens
and exciter lamp are fixed in position. If the
film guide cannot be moved, then adjust the
lens and LED/exciter lamp assembly laterally.