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2.行扫描部分波形关注与重点:行扫描部分要检测的信号波形,主要有:行振荡波形、行激励波形、行推动波形和行输出管集电极逆程脉冲波形和行偏转线圈两端的波形、行输出变压器各脚波形等,这些波形均属本机产生的信号,不接收电视节目时就可测到。A3机芯的小信号处理集成电路LA7680輶輦訛脚为行振荡陶瓷滤波连接端,外接500kHz陶瓷振荡器,产生500kHz信号,经集成电路内32分频器分频后,得到行频信号(继续分频后得到场频信号),将示波器扫描
2. Line scanning part of the waveform focus and focus: line scan part of the signal waveform to be detected, there are: line oscillation waveform, the line excitation waveform, the line push the waveform and row output tube collector reverse pulse waveform and line deflection coil at both ends of the waveform , The output transformer pin waveform, etc., these waveforms are generated by the local signal, do not receive TV programs can be measured. A3 movement of small signal processing IC LA7680 辇 辇 Erroneous feet for the line oscillation ceramic filter connection, an external 500kHz ceramic oscillator, a 500kHz signal generated by the integrated circuit 32 frequency divider to obtain the horizontal signal (continue Frequency-domain signal obtained after the frequency), the oscilloscope scan