T R O U B L E S
Break Above Intermittent - With Music or Other Sound Accompaniment Where Exact Synchronism is Not Essential. Rethread and continue as previously described for break below intermittent. Synchronism is usually lost under these conditions, but this can be tolerated in an emergency, unless there is a direct cue in record, such as a knock, voice or cheers. In such a case, pass over cue with fader on zero.Needle Jumps Groove
If the needle jumps back the sound will repeat, and may keep on repeating at every revolution of the record. If the needle jumps forward, the sound will be ahead of the picture. The procedure will depend on the character of the film and on where the jump occurs. Any record on which the needle has jumped must never be used again, and the reproducer should be checked as soon as possible, when covered under "Troubles When Testing - Reproducer Not Tracking Properly". Bring fader to zero immediately jump is noticed; the next procedure will depend on circumstances, as follows:
With Speech or Other Sound Accompaniment Where Exact Synchronism is Essential. In this case it is not possible to continue without losing synchronism, and there is therefore no option except to continue program with next reel, which is set up on other machine, or else cut out sound for remainder of this reel.
With Music or Other Sound Accompaniment Where Exact Synchronism is Not Essential
Keep projector running, and look over reproducer quickly to see if there is any visible cause for jump, such as reproducer body dragging on record, or reproducer hitting something that prevents it from moving freely. If so, remove obstacle or change reproducer (See "ReplacementsChanging Reproducers"). This, of course, involves loss of accompaniment for remainder of reel.
If no cause for trouble is evident, then, if needle jumped back, change needle, move reproducer over to a position two or three grooves ahead of where it was when it jumped, and restore fader to its regular setting. If needle jumped forward, and if it now seems to be tracking properly, restore fader to regular setting.
Synchronism is lost when record is continued after needle has jumped, so in such cases if there are any direct cues in picture, such as knocks, voices, cheers, etc., fader must be put down to zero when passing over them.
Quality Goes Bad or Noisy
Volume Falls Off or Ceases
See recommendations already made under these headings in previous section "Troubles Occurring When Testing".
[COVER] [REGISTRY] [TITLE PAGE] [CONTENTS] [INTRODUCTION - PAGE 1] [STORAGE BATTERIES - PAGE 9] [STARTING AND TESTING - PAGE 14] [SETTING UP - PAGE 20] [REHEARSING - PAGE 27] [TROUBLES - PAGE 29] [REPLACEMENTS - PAGE 34]