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 #:
000709
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 693 THE TROUBLE TESTS THE CONDITION FOUND NEXT TEST 21. Correct setting 22. Tighten connection TROUBLE CURED TROUBLE CURED 23. Check setting and tightness Setting wrong of connections of reverse feedback circuit or harmonic equalizer, if any 24. Using headphones check through successive stages of amplification to find stage at which distortion appears 25. Check with ohm meter, and visually and manually if necessary, all connections and insulation of faulty stage speech circuits, tugging at contacts, etc. 26. Using ohm meter, test all parts carrying speech current in faulty stage 27. Test capacitance of or replace all condensers carrying speech current in faulty stage 28. Replace all speech transformers and choke coils carrying speech current in faulty stage 29. Apply Tests 25, 26, 27 and 28 successively to all speech circuits of the amplifier Connection faulty All settings and connections okay No reverse feedback or harmonic equalizer Faulty stage found Beginning of distortion cannot be distinguished TROUBLE FOUND No trouble found TROUBLE FOUND No trouble found TROUBLE CURED Trouble remains TROUBLE CURED TROUBLE FOUND No. No. 21 22 No. 24 No. 24 No. 25 No. 29 No. 26 No. 27 No. 28