ocr: PICTURE TUBE RED SIGNAL PICTURE TUBE - PHOSPHOR COATING GREEN SIGNAL - 2000 - - BLUE SIGNAL. SCANNING SHADOW ELECTRON MASK BEAMS XR E EE SIGNALS FROM CHROMINANCE DEFLECIION SCREEN AND LUMINANCE COIL DEIECIORS Most of the air has been removed from the picture tube ofa television sO that the electron beams are able to make it through to the screen. The part ofthe signal that controls the scanning of the electron beams passes through the defection coils. These coils produce changing magnetic fields, which steer the electron beams in their scanning motion.
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