海信牌TC2518KB(91SB机芯)彩电图像上半部压缩
测N303各脚电压,#2、#7与正常值不符,而且TA8427K温度很热,换N303故障依旧,测#2、#7外围件C319、C321、V320、VD321、C313、VD310都正常,当测R322时,阻值已变大,换R322电阻正常。
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