Servicing projection equipment (1932)

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00021
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:
August 15, 2024
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BUZZER SIGNAL SYSTEM Trace these wires for the short circuit ; and if it is found, separate the wires and insulate them against repetition. (f) — Test the ringing device; and if it is found faulty, repair or replace it. (g) — The push-button contact may be defective:— therefore, it should be tested and corrected. 2. Device Operates Intermittently (a) — Examine all connections, and if they are loose, test and tighten them. (b) — A poor button contact may be the cause: — therefore, clean or replace the defective contact. (c) — Another probable cause is a low battery. Test the voltage, and if it is found low, replace the battery (if a dry cell), and (if a wet cell), replenish it. 3. Bell (or Buzzer) Sounds Continuously (a) — The button may be defective. Note if the button springs free of the contact when finger pressure is removed ; the cause is evident if it does not. Clean away the dirt or repair the spring — and, if necessary, replace the defective part. (b) — A short circuit between the wires leading to and from the push-button may be the reason. If these two touch, the signal will continue until they