推荐回答(4个)
STV2247H
脚号 符号 功能说明
1 SIFIN1 伴音中频信号输入1
2 SIFIN2 伴音中频信号输入2
3 AGCSIF CAP 伴音中频AGC滤波
4 VREFIF 中放电压基准
5 AGC PIF CAP 图像中频AGC滤波
6 PIFIN1 图像中频信号输入1
7 PIFIN2 图像中频信号输入2
8TUNER AGC OUT 高放AGC输出
9 IFPLL 中频锁相环滤波
10 GNDIF 地(中放)
11 AM/FMOUT/SC AM/FM音频输出
12 VCCIF 电源(中放)
13 INCUBSOUT 内部视频输出
14 EXTAUDIO IN 外接音频输入
15 PIF C1 中频振荡线圈
16 PIF C2 中频振荡线圈
17 VCC2 电源(视频亮度部分)
18 CVBSIN1 视频1输入
19 GND1 地(视频亮度部分)
20 CVBSIN2 视频2输入
21 BS 黑电平延伸滤波
22 Y/CVBSIN3 Y/视频3输入
23 CHR C输入(S-V)
24 APR 自动RGB尖峰调整
25 BEXT/UEXT 外接兰基色/U(B-Y)输入
26 GEXT/YEXT 外接蓝基色/Y输入
27 REXT/VEXT 外接红基色/V(R-Y)输入
28 FBEXT 外接消隐输入
29 NC 空脚
30 BOUT 蓝基色输出
31 GOUT 绿基色输出
32 ROUT 红基色输出
33 ICATH 电流检测输入
34 BOSD 蓝字符输入
35 GOSD 绿字符输入
36 ROSD 红字符输入
37 FBOSD/HC 字符消隐输入
38 XTAL3/BTUN 外接微调电容
39 XTAL2 3.58MHz晶振连接
40 XTAL1 4.43MHz晶振连接
41 CLPF 彩色锁相环滤波
42 X1/VAMP/CHORLT XTAL1控制/垂直DAC输出/彩色基准输出
43 GND1 地(彩色/扫描部分)
44 CVBSPUT1 第一视频开关输出
45 VCC1 电源(彩色/扫描部分)
46 BCL/SAT 束流控制/安全保护输入
47 VERT 场脉冲输出
48 HOUT 行脉冲输出
49 LFB/SSC 逆程脉冲输入/沙堡脉冲输出
50 SLPE 扫描锁相环滤波
51 SCL I2C总线时钟端
52 SDA I2C总线数据端
53 VCCD 电源(数字电路部分)
54 GNDD 地(数字电路部分)
55 AUDIO OUT 主音频输出
56 FMCAP FM解码
顺喇叭线找,很快会知道了,,,,,,,,,,,,,,,,,,,,,,,,,,,
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