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 #:
000689
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 673 To Determine the Cause and Correction of LOW VOLUME, DUE TO HEAD TROUBLE THE TROUBLE TESTS I. Observe color of exciting liqht at film or p.e.c. location 2. Check exciting light focus 3. Check p.e.c. voltage with very high resistance meter, or ahead of p.e.c. load resistor with low resistance meter 4. Replace p.e.c. 5. Using high resistance ohm meter check p.e.c. output circuits, load resistor, trans-, former, etc., for partial ground or short 6. By visual inspection, ohm meter, tugging wires and replacement of parts if necessary, check between p.e.c. output and head output 7. Proceed per Trouble Test No. 6 of Chart No. 8. 8. Adjust focus 9. With spotlight gelatine and magnifier inspect exciter lamp filament while lit for sag or slope 10. Replace exciter lamp 11. Inspect optical system lens tube, lenses, prism, slit THE CONDITION FOUND Light white Light yellow Focus correct Focus poor Volt«ge normal Voltage low TROUBLE CURED Volume still low TROUBLE FOUND No trouble found TROUBLE FOUND TROUBLE FOUND TROUBLE CURED Good focus unobtainable Filament sags or slopes when hot Filament normal TROUBLE CURED TROUBLE FOUND 12. Clean oil from optical I TROUBLE CURED lenses, prism, exciter lamp, p.e.c, opening or replacing lens tube if necessary NEXT TEST • No. 2 No. 12 No. 3 No. 8 No. 4 No. 7 No. 5 No. 6 No. 9 No. 10 No. II