User`s manual

B-Chain Alignment Procedures
Notes
5-31
Press format 04 Dolby Stereo A-type.
Thread and play the Cat. No. 151 Stereo Optical Surround Level test film. Check
the sound by walking around the theatre. The surround and center channels
should sound equally loud at most locations and left and right surround channels
should sound equally loud and have similar frequency response in the center of
the theatre. If necessary, readjust the surround output level until you are
satisfied with the surround-to-front center balance. A large change in the gain
setting should be unnecessary.
5.4 Surround Alignment