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adjustment amplitude antenna audio section B&W picture bandpass amplifier beam bias brightness capacitor carrier cathode cause center frequency chroma coil color bar color killer color section color signal color sync components composite i-f control grid dc supply dc voltage deflection circuits deflection system demodulators diode display distortion electron fault feedback function high-voltage horizontal deflection horizontal output i-f amplifiers i-f section i-f stages intermediate frequency isolated justments limiter grid marker mixer modulation multivibrator negative operation oscillator output stage pentode phase detector plate current positive power supply present problem procedure proper quadrature grid raster receiver resistor response curve scope screen grid second-anode service data shown in Fig sideband signal path solid-state sound i-f sweep alignment switch symptoms sync circuits sync pulse sync signal transistor transmitted trap trouble troubleshooting tube tuned circuits tuner usually varactor vary vertical sync video detector video section video signal VTVM waveform waveshape yoke