F. H. Richardson's bluebook of projection (1942)

Record Details:

Title:
F. H. Richardson's bluebook of projection
Date:
1942
Publisher:
New York : Quigley Publishing Company, Inc.
Volume:
F. H. Richardson's bluebook of projection
Leaf #:
000687
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
July 11, 2024
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SOUND TROUBLE-SHOOTING CHARTS 671 8 To Determine the Cause and Correction of NO SOUND, DUE TO HEAD TROUBLE THE TROUBLE TESTS I. Observe exciter lamp 2. Observe if light reaches p.e.c. 3. Wave finger or pencil in light path (move film out of way) 4. Re-thread film, making sure sound track is correctly aligned 5. Check p.e.c. voltage with very high resistance meter, or ahead of p.e.c. load resistor with low resistance voltmeter 6. Check voltage at output of p.e.c. supply unit 7. Check line between supply unit output and p.e.c. for open or short 8. Check supply unit failure per Chart No. 4 or No. I I according to voltage supply used. 9. Check supply unit failure per Chart No. 5 or No. 12 according to voltage supply used. 10. Replace p.e.c. II. Using high resistance ohm meter check p.e.c. output circuits, load resistor, transformer, etc., for open, ground or short; check p.e.c. amplifier (if any) per Chart No. 14. THE CONDITION FOUND • Lamp lit normally Lamp out Lamp dim Light path normal Light path obstructed Normal clicking No sound heard TROUBLE CURED No p.e.c. voltage P.e.c. voltage normal P.e.c. voltage low Output voltage normal No output voltage Output voltage low TROUBLE FOUND TROUBLE FOUND TROUBLE FOUND TROUBLE CURED No sound TROUBLE FOUND No trouble found NEXT TEST • No. 2 No. 16 No. 21 No. 3 No. 15 No. 4 No. 5 No. 6 No. 10 No. 6 No. 7 No. 8 No. 9 No. II No. 12