收到同行送来的故障机壹台海尔LE32F3000W液晶电视,故障表现为热机黑屏,拆机测量,正常时测各项电压正常,考虑到是某些原件不稳定造成,于是用风枪挨个原件加热,当吹到背光升压芯片L3022M-G1时,电视瞬间黑屏,反复尝试确定是这个升压芯片过热保护,更换后未再加热未发生黑屏现象。 |
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