Image upper torsion, namely every bad start: synchronization. This is a fault from the public channel nonlinearity, AGC circuit malfunction, causing detection output of color television signals, synchronization signal amplitude compression; In addition line of AFC circuit of bad, bad portent circuitry also produces upper image distortion of failure. aSUservice manual download site
(1) with oscilloscope check IC201 (1) the output of color television signal, amplitude, synchronization head proportion are correct. aSUservice manual download site
(2) to see previewing the pipes Q201 emitter all television signals, synchronization head for compression, waveform. The multimeter Q201 voltage measurement, e, and 6 are 3 v, suggesting that the tube be breakdown. Replace diode C458 man after the failure to eliminate.aSUservice manual download site