Service switch for video display deflection apparatus

Details Service switch for video display deflection apparatus Service switch for video display deflection apparatus

H - Electricity

04

N

H04N 3/16 (2006.01) H04N 17/04 (2006.01)

Patent

CA 2089297

A sawtooth signal generator of a D.C. coupled vertical deflection circuit is responsive, during service mode of operation, to a first signal at a D.C. level that is indicative of vertical centering. During the service mode operation, the generation of the sawtooth signal is disabled and, instead, the generator generates a D.C. signal that is D.C. coupled via a vertical deflection amplifier to a vertical deflection winding in a manner to position an electron beam at the vertical center of a display screen.

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