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机型:创维21NF8800A彩电(解码块是LA76810A,CPU是LC863324-5S68,存储块是ST24C08)。故障现象:无伴音,喇叭中只有与黑白电视机无信号时一样的噪音,改变制式时,有对应的字符显示,图像也可随制式的改变而变化,但伴音在转换过程中毫无变化。分析与检修:怀疑I2C总线出错误,按2003年《电子报》合订本上册第380页的文章《I2C总线彩电维修进入/退出方法88种》中的创维25NF8800彩电试进
Model: Skyworth 21NF8800A color TV (decoding block is LA76810A, CPU is LC863324-5S68, storage block is ST24C08). Symptoms: no sound, only the black and white speakers with no signal when the same noise, change the standard, there is a corresponding character display, the image can also change with the change of the system, but the sound in the conversion process no change. Analysis and Overhaul: I suspect the I2C bus error, according to the 2003 “eNewsletter” on the book on page 380 of the article “I2C bus TV repair access to / exit method 88” Skyworth 25NF8800 color TV test