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

Page scan 000707 from F. H. Richardson's bluebook of projection

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 #:
000707
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 691 17. To Determine the Cause and Correction of DISTORTION ORIGINATING IN AN AMPLIFIER WARNING: In applying Tests, 5, 6, 9, II, 15, 17 and 24, above, and similar tests of the earlier charts referred to, take all precautions against contact with high voltage, using long, well insulated test prods and well insulated test leads. THE TROUBLE TESTS THE CONDITION FOUND NEXT TEST • • • Examine all tube filaments All filaments normal No. 3 I One tube not lighted No. 2 2. Proceed per Test No. 28, Chart No. 14. 3. Check plate current meter readings 4. Replace low reading tube 5. Check all socket voltages of low reading tube with high resistance voltmeter, and examine faulty circuit for cause of improper voltage 6. Apply Test No. 5, above to low readinq tubes, and look for trouble cause in those portions of the faulty supply circuit which are common to all tubes affected 7. Proceed per Chart No. 5 or No. 12. Replace high reading tube TROUBLE CURED All readings normal One reading low Some readinqs low All readings low One reading high Some readings high All readings high Meter reads some tubes only No meter TROUBLE CURED Distortion and low reading remain TROUBLE FOUND TROUBLE FOUND TROUBLE FOUND TROUBLE CURED Distortion and high remain No. 19 No. 4 No. 6 No. 7 No. 8 No. 10 No. 12 No. 13 No. 14 ■eading