User`s manual

A-Chain Alignment Procedures
Notes
4-13
b. Optical Preamplifier Adjustments
Remove the SMPTE Buzz Track Film and thread and play the Cat. No. 97 Stereo
Cell Alignment Film. While the film is playing, look at the oscilloscope. If a large
amount of crosstalk is present, loosen the stereo solar cell head and move the head
from side to side until the crosstalk is minimum and equal. (The right channel is
the track toward the outside of the projector.)
NOTE: On some projectors, it may be necessary to
stop the film to adjust the position of the cell. The right
channel is the track toward the outside of the projector.
Lock the cell bracket into position after completing this adjustment. Check that
the crosstalk has not changed as the bracket was tightened.
Verify that the outputs of the right and left solar cells are properly connected by
placing a white card over the right solar cell (nearer the outside of the projector)
and confirming that the level of the right channel drops — as indicated by the
right channel LEDs located on the Cat. No. 222 SR/A module.
Repeat the SMPTE Buzz Track alignment in Step 8. If the film or optics/exciter
lamp position must be readjusted, repeat Step 9. The optimum setting is attained
when no further adjustments are required in Steps 8 and 9.