The amplifier is broken and there is no sound, you can fix it with your phone

The amplifier is broken and there is no sound, you can fix it with your phone
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The power amplifier is broken and there is no sound. It turns out that it can be checked and repaired with a mobile phone, which is better than a multimeter [I love electrical appliance repair]

[@jcoz1]

土土的，但实用！

[@tamdickson6556]

👍👍👍👏🙏🙏🙏