CRT PROTECTION CIRCUIT OF PROJECTION TV

摘要

a first comparator for comparing the detected vertical output to a previously fixed reference voltage; an integrator converting the output signal of the first comparator into a direct current; a rectifier rectifying the waveform output from the integrator to output a complete DC value; a second comparator for comparing the output signal of the rectifier with the previously fixed reference voltage; a malfunction displaying part for indicating that the vertical output is in an abnormal operation and a beam current/high voltage control part for cutting off the beam current/high voltage when the output of the second comparator is HIGH.