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故障现象:长虹 C2966型彩电,“二次开机”后荧屏内容反复在图像瞬时正常,瞬时偏红;伴音时大时小或无伴音;场幅严重抖动或压缩或变为一条水平亮线。上述现象随机出现,没有先后之分。分析与检修:一机多病且变化无常,属典型的“错码”现象。大家知道,I~2C 总线控制电视机的特点:即每次启动电视机,微处理器须将上次关机时存储的信息(数据)从存储器中逐一取出,经 I~2C 总线传送到相关
Symptoms: Changhong C2966-type color TV, “second boot ” after the screen content in the image instantaneously normal, instantaneous reddish; sound when small or no sound; large amplitude jitter or compression or into a horizontal bright line . The above phenomenon occurs randomly, there is no prior art. Analysis and maintenance: a machine sick and volatile, is a typical “wrong code ” phenomenon. As we all know, I ~ 2C bus control TV features: that is, each time you start the TV, the microprocessor must be the last shutdown of the stored information (data) removed from memory one by one, via I ~ 2C bus to the relevant