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/ Apple Service Training: … to Apple Monitor Service / Introduction to Apple Monitor Service v1.0 1994.iso / DS⁄IAMS audio / Topic 5-CRT Theory.snd (.mp3) < prev    next >
Apple QuickTime Audio  |  1994-01-31  |  7.5 MB  |  1 channel  |  22,050 sample rate  |  25 seconds  |  [MooV/TVOD]
Transcription: Before you start any adjustment, it is important to understand some theory behind the adjustment. Here's the element of a picture tube, starting with a cathode. There are three cathodes or electron guns. For simplicity, this drawing shows one cathode. Each cathode shoots electrons to the inside surface of the phosphorous screen and emits light.