| 收到同行送来的故障机壹台美的电磁炉.货号-RK2101.型号-C21---RK2101.2100W.拆机发现油污堆积,清洗干燥.上电待机测量3电压正常,按开机键开不了机,按任何键都无显示.初步确定故障在控制板上,测量按键正常,补焊CPU各脚后,故障仍未排除.逐一检查阻容件都正常,难道CPU坏了,换上SM1668贴片集成块后试机一切正常.分析认为油污严重,板面漏电,击坏了集成块 |
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