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1180 HANDBOOK OF PROJECTION FOR
certain the needle point is in the groove. Place the record clamp over the turntable center pin, pressing it down firmly, but not too hard.
(11) Rotate motor flywheel by hand until turntable has revolved the required number of times, as per its marking, see instruction (D), seeing at the same time that the needle tracks properly on record, and that the film moves as it should. Having completed this you are ready to start the projector, or if it be the first reel, the show.
(12) See to it that the fader is at zero; that relay switch and pilot light is on "Disc" and that your motor control box is on regular setting.
(13) Close the projector motor switch, and as soon as full speed is attained, bring the fader up to its proper setting. Do not swing it up suddenly, but with moderate speed. Experience will quickly teach you just how fast to raise the volume — advance the fader pointer.
If it be a change-over, you should have the picture cue far enough from the end to permit the other projector to attain full speed before change-over, and with most projectors this requires about six feet of film. You will, however, do well to test each projector, since some will attain full speed somewhat more quickly than others. Be sure not to move the fader over until the other projector has attained full speed. If you do there will be a very bad effect.
(14) The projectionist should carefully watch the action and compare it with the sound at each changeover, since there is always the possibility of something happening at change-over to injure synchronism. Important: If it is found that there is an out-of-synchronism,