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众所周知,检修彩电过程中,发现大规模集成电路的某个引脚内部电路损坏,常规检修思路是更换这个集成块。但在上门检修的应急修理,或者是该IC在当地购买不到或价格昂贵等情况下,如果通过改动IC外围元器件的参数,达到救活该IC块,修复机子的目的,也是一种检修技巧。笔者通过介绍这个实例,抛砖引玉,希望同行多介绍这方面的经验,使我们的检修技术水平共同提高。故障现象:一台创维29SH8000型彩电(转修机),采用东芝TB1240AN机心电路。出现无图像、无伴音,呈
As we all know, overhauling color TV process, found that a pin of large scale integrated circuit internal circuit damage, routine maintenance thinking is to replace the manifold. But in the on-site maintenance of emergency repairs, or the IC is not locally purchased or expensive, etc., if by changing the parameters of IC peripheral components, to save the IC block, repair the machine’s purpose, but also a maintenance skills . By introducing this example, the author, initiate, hope counterparts to introduce more experience in this area, so that our technical level of maintenance together to improve. Symptom: a Skyworth 29SH8000 color TV (turn machine), using Toshiba TB1240AN movement circuit. Appear no picture, no sound, was