故障表现为 :三无(灯亮) 检修与分析 :检查数字板电压,发现+12V/+3.3V都正常,而无1.28V电压,更换U806(MP1495)后仍无1.28V,查U806外围发现C862漏电,更换C862后,故障机修到这里,终于修好值得探讨。。 |
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