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Television Horizontal Section. Comparison o f a black and white television Horizontal section. Booth drive sawtooth signal that runs to the deflection yoke. Booth have high voltage about 30,000V and about 20,000 for black and white.
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Comparison o f a black and white television Horizontal section • Booth drive sawtooth signal that runs to the deflection yoke. • Booth have high voltage about 30,000V and about 20,000 for black and white. • Picture tubes that uses high voltage electrostatic focus requiring approximately 6,000 volts • Booth have the output stage • For colored it requires anti-pincushioning circuits these are not found In a B & W • B & W have less radiation compare to colored
Horizontal Output AmplifierColored Television horizontal output is just the same as the Black and white • Flyback function • Flyback acts as step down transformer between horizontal amplifier and the yoke • Act as stepdown transformer supply AC voltage for the picture tube heater and rectifier. • Supplies retrace pulses for the use of other sources. (AGC, AFC and horizontal retrace blanking
Horizontal Scanning Center to the right • Supply is given to the electron beam of the picture tube • Retrace
Controls in the horizontal Section • Horizontal Hold • Horizontal line • Focus • Horizontal width • High voltage adjust
Problems • Picture width • Blurred picture • Horizontal line • Picture rolling sideways • Distorted pictures
Typical Horizontal output Amplifier Black and White