User`s manual

A-Chain Alignment Procedures
Notes
4-19
b. Optical Preamplifier Adjustments
Thread and play the Cat. No. 69T Dolby Tone test film. Verify that the Dolby
tone indication is shown on the Cat. No. 222 SR/A card (the center two green
LEDs are lit for both the R and L channels). If necessary, re-adjust the Proj 1 left
and right gain controls on the Cat. No. 240A card. Do not re-adjust the hf
controls.
Repeat all of the above steps for projector No. 2.