用500型三用表直流电压10挡,测IGBT温度检测电路插口,CPU芯片(TIGBT)电路对地OV电压(正常为+0.25V),将三用表拨至电阻lOOΩ挡,检测发现CPU芯片(TIGBT)电路中对地旁路电容器C3击穿。更新C3后整机恢复正常。 |
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