M52340sp中频、视频、色度与扫描小信号处理电路

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引脚功能 脚号符 　号功 　　能直流电压( V )脚号符　 号功　　 能直流电压( V )1AFT OUTAFT输出3.727G IN外G信号输入2.22LIMITER IN伴音中频输入2.128COINCIDENCE音频信号负反馈6.23RF AGC OUT高频AGC输出 7.829R IN外R信号输入6.24IF AGC FILTER中频AGC滤波、VTR开关2.830KILLER FILTER色信号电路外接滤波器2.65VIF GND中频地031FAST BLK字符快速消隐信号输入06VIF IN中频信号输入1.4323.58M3.58MHz晶振37VIF IN中频信号输入1.433AUDIO BYPASS音频旁路3.28VIF Vcc中频电路供电534ID FILTERID滤波器1.89H Vcc行启动电源7.635APC FILTERAPC滤波器2.810IIL Vcc中频电路供电1.336TV INTV视频信号输入2.211SCLI2C总线时钟信号输入537VCO GNDVCO地012SCP OUT沙堡脉冲输出0.838Y SW OUTY信号输出(至同步分离)2.613H OUT行激励脉冲输出1.6394.43M4.43MHz晶振314H DSC行500晶振3.840SYNC SEP IN同步分离输入5.815SDAI2C总线数据信号输入541B-Y OUTB-Y解调输出2.216AFC1 FILTERAFC1滤波4.442SECAN REFSECAN接口1.417GND地043R-Y OUTR-Y解调输出2.218V OUT场激励信号输出644B-Y INB-Y解调输入2.819AFC2 FILTERAFC2滤波445R-Y INR-Y解调输入2.620HI Vcc8V供电846AUDIO OUT音频输出3.221B OUTB基色信号输出347AUDIO Vcc音频电路供电7.822G OUTG基色信号输出348FM DIRECT OUT伴音中频去加重电容2.823R OUTR基色信号输出349VCOPIF调谐回路424VCO VccVCO电路5V供电550VCOPIF调谐回路425B IN外B信号输入2.251VIDEO APCFILTER视频APC电路滤波器326CONTRAST自动对比度控制352VIDEO OUT视频信号输出3.2

大连-五洲维修

不错。。。。。。。。。。