观察此功放机左声道输出正常,说明电路基本正常;测右声道功放未级音频信号正常,说明故障出在右声道信号输出电路或继电器保护电路中。检查发现,右声道的继电器触头接触不良,换新后故障机修到这里,终于修好值得探讨。。 |
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