该机收看电视信号(TV)时正常,收看视频(AV)时无图无音,由于该机采用OM8371芯片其42脚为AV的视频输入脚,是由视频端子经C414直接输入到该脚,当无视频信号时同时也将音频信号切断,经查C414及视频端子到OM8371线路无故障,更换该芯片试机工作正常. |
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