IC手冊|STV2248中放,解碼,行,場掃描小信號處理

腳號有信號電壓/V無信號電壓/V黑筆接地/KΩ紅筆接地/KΩ引腳功能12.42.412.812.5伴音中頻信號輸入122.42.412.812.5伴音中頻信號輸入231.91.910.412.5伴音中頻AGC濾波43.23.29.614.8中放電壓基準51.91.91012.5圖像中頻AGC濾波62.42.412.812.5圖像中頻信號輸入172.42.412.812.7圖像中頻信號輸入283.83.89.228高放AGC輸出92.12.11115.5中頻鎖相環濾波100000中放地114.14.110.314AM/FM音頻輸出125.15.1613.5中放電源133322內部視頻輸出141.61.61414外接音頻輸入154.14.16.514中頻振蕩線圈164.14.16.514中頻振蕩線圈178.48.40.50.5電源(視頻/亮度部分)183.43.41214視頻輸入1190000地(視頻亮度部分)203.23.21214視頻2部分212.62.612.213.8黑電平延伸濾波223.23.210.813.8Y/視頻3輸入230.10.11321C輸入(S-V)241.81.81213自動RGB尖峰調整252.42.410.316外接藍基色/U(B-Y)輸入261.61.610.316外接綠基色/Y輸入272.42.410.316外接紅基色/V(R-Y)輸入280000外接消隱輸入293.43.411.712.5空腳302.72.711.711.5藍基色輸出312.72.711.711.5綠基色輸出322.62.611.711.5紅基色輸出334.74.7912電流檢測輸入340.30.31216藍字符輸入350.30.31216綠字符輸入360.30.31216紅字符輸入370010.9字符消隱輸入380011.112.5外接微調電容390011.5133.58MHz晶振連接401.21.211.513.54.43MHz晶振連接411.71.71114彩色鎖相環濾波423.93.99.516.8XTAL控制/垂直DAC輸出/彩色基準信號輸出430000地(彩色/掃描部分)444.24.298.6第一視頻開關輸出458.38.357電源(彩色/掃描部分)466.76.710.217束流控制/安全保護輸入474.44.410.218場脈沖輸出48227.69.4行脈沖輸出490.70.710.59逆程脈沖輸入/沙堡脈沖輸出504.14.111.313掃描鎖相環濾波512.22.26.517.5I²C總線時鐘端522.12.1617.5I²C總線數據端535.25.26.211.2電源(數字電路部分)540000地(數字電路部分)554.14.113.514主音頻輸出561.41.410.223FM解碼

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