故障分析与检修:开机后有声无图,测主电源140V正常,测视放电压只有160V(正常应为200V左右),V401 D极为90V偏高,试更换数字板故障依旧,怀疑故障在行扫描部份,逐一检查,发现C405(330n/400V)电容开路,更换后故障机修到这里,终于修好值得探讨。。 |
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