Servicing projection equipment (1932)

Page scan 00020 from Servicing projection equipment

Record Details:

Title:
Servicing projection equipment
Date:
1932
Publisher:
New York : Mancall Publishing Corp.
Volume:
Servicing projection equipment
Leaf #:
00020
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 BELL OR BUZZER SIGNAL SYSTEM 1, Bell (or Buzzer) Does Not Operate (a) — The battery is either low or dead: therefore, test its voltage. If it is dry cell battery and its voltage is low, replace it ; if it is a wet cell battery and its voltage is low, replenish it. (b) — Probably a disconnected wire is the canse. Examine the contacts and connections and tighten or repair them. (c) — Dirty and loose contacts are sometimes the canse. They should be examined, then cleaned and tightened. (d) — Dampness may have rotted the insulation, causing a short circuit. Look at any part of the system that is in a place likely to be constantly damp. Examine the wiring and insulation for wear or a break and replace them, if required. (e) — A short circuit is another common cause. It may deaden the system or the individual bell and will, most likely, be found in the wire which, leading from the bell to the battery, makes a contact with the wire leading from the bell to the button.