| 开机AV、TV无音，测功放MSH9000的26脚静音控制电压为0.3V，低电平处入静音壮态，查静音电路测到V206时V206C极无电压，正常应为4.8V，测V206b极对地阻值为无穷大，经查XS606耳机座损坏，更换后声音正常。 |
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