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  1. iceman57ad

    Solution for 2270 high bias - early serial number

    Hi my 2270 has the idle current problem. I have had this 2270 since 1978 when I bought it for $65 dollars From an acquaintance. Now that I have replaced the caps and some transistors including the output on 1side. With the idle current at 18.4 to 18.9 on both channels and barely knowing anything...
  2. iceman57ad

    Pioneer Phono Stage Opinions

    Hello everyone, this is my first post. I have a pioneer qx4000 the phono section is not working in it. Does anyone know Which board controls the phono? When I turn to phono all I get is loud static. Any help would be greatly appreciated. Regards Jerry
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