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

Page scan 000694 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 #:
000694
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
Date Added:
May 02, 2025
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678 RICHARDSON'S BLUEBOOK OF PROJECTION 12 To Determine the Cause and Correction of LOW VOLUME, DUE TO POWER CIRCUIT THE TROUBLE TESTS I. Check line voltage THE CONDITION FOUND m Line voltage low Line voltage normal 2. Adjust line voltage regula TROUBLE CURED tion 3. Replace rectifying tube; 4. Check filament transformer voltages 5. Check for dirty power switch or other high resistance between power source and transformer input 6. Replace filament transformer 7. Check plate voltages transformer 8. Check for dirty power switch or other high resistance between power source and transformer input 9. Replace plate transformer 10. Check filter condensers for open circuit II. Check filter parts and wiring for high resistance line, short or ground TROUBLE CURED (test old se^ to find faulty tube) Volume remains low Input voltage low Output voltage low, input normal Voltages normal (approximately) TROUBLE FOUND TROUBLE CURED Input voltage low Output voltage low, input normal Voltages normal TROUBLE FOUND TROUBLE CURED TROUBLE FOUND No open found TROUBLE FOUND NEXT TEST • No. 2 No. 3 No. No. No. No. 7 No. 8 No. 9 No. 10 No. II