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一台PHILIPS牌AS235/35H型组合音响,出现双声道收放音均无声故障,经检查是该机两只功放集成块AN7161N损坏。通过分析电路发现,该集成块与市场易购的AN7168的内部结构和引脚功能基本相同,经试验,用AN7168代换AN7161N获得成功。不需更换任何元件,只要按表1对应脚号用导线连接即可。对应脚接法见表1所示。
A PHILIPS brand AS235 / 35H-type combination of audio, there are two-channel playback sound are silent fault, the aircraft is the test two amplifier block AN7161N damage. Through the analysis of the circuit found that the block and the market of commercially available AN7168 internal structure and pin functions are basically the same, the test, with AN7168 replaced AN7161N success. No need to replace any components, as long as the table corresponding to the foot number with wire connections. Corresponding to the connection method shown in Table 1.