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Plese HELP! My Meixing 3008-AB has problem

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aubean 發表於 2008-2-27 19:12:24 | 顯示全部樓層 |閱讀模式
Recently, I have to turn on and off my amp MeiXing 3008-AB (Mingda) frequently to test which set of tubes is suitable for me. However, starting from a few days ago, the right channel of my speaker sometimes had no sound when I turned on the amp. It might become normal if tried two times or more. I have checked that the tubes are all right. I discover that whenever the 300B tube at the right hand side does not light up, the right channel has no sound. The manufacturer replied that the warranty of my amp had already expired.
   Therefore, I want to ask anyone (you all are expert) can tell why this happens. I have checked the circuit with no loosing component. Is it the problem of the switch, capacitor or resistor? So help me please. I want to fix it by myself because it is too heavy for me to take it somewhere.
If not, please tell me where I can take it for repair?
THANK YOU SO MUCH FOR YOUR HELP!!!!!!!  :cry:  :cry:  :cry:  :cry:  :cry:

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