Servicing projection equipment (1932)

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x CONTENTS (Continued) PAGE ment is altered 136; Rheostat coil or grid burns out 136-137; Rheostat shows visible heating at one point of Coil or Grid 137; Rheostat overheats and does not operate properly 137-138; Rheostat fails to pass current 138-140. SCREEN: 141-142 Screen not giving results up to previous performance 141-142. SPARKING: 89-93 SPOTLIGHT: 143-144 Beam falls upon audience, causing annoyance and distraction 143; Ghost shows in spotlight beam 143; Rings and shadows show in spotlight beam 144; Poor lighting with spot 144. STARTING TROUBLES: 71-75 Device fails to start when proper starting instructions are followed 71-72; Set operates but does not attain full speed 72; Motor revolves in wrong direction 72-74; Set does not pick up readily 74; Set does not deliver full voltage 74-75. STEREOPTICON TROUBLES: (NOTICEABLE ON THE SCREEN) 123-127 Stereopticon picture smudgy looking 123; Ghost in center of stereopticon picture 123; Yellow corners in stereopticon picture 124; Both pictures of dissolving stereopticon fail to be in register 124-126; Stereopticon device shows break in a condenser although projector does not 126; Shadow of carbons and (or) holders appears when using Reflector Arc for Stereopticon 126-127; Stereopticon slides crack excessively 127. SWITCHES: 145 Switches heat, warm or hot to touch 145. TRAVEL GHOST: 120-122 Travel ghost shows up 120; Travel ghost intermittently 121; Travel ghost pronounced 121; Travel ghost; Picture seems to crawl up on screen 121; Uneven light. Noticeable most on plain screen 121-122. VOLTAGE: 94-96 Voltage fluctuates badly 94; Voltage does not build up as it should when set is started 94-96; Low Voltage continues 96; Voltage builds-up although set is running idle (Series arc equipment) 96.