AX9 Yamaha amp , no functions , schematic / advice please .

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  • zen
    Badcaps Veteran
    • Apr 2011
    • 511
    #1

    AX9 Yamaha amp , no functions , schematic / advice please .

    This one seems to power , as the RED LED for standby goes out , or on as the case may be & relay clicks over , but none of the LEDS for any of the inputs light .

    Suspecting a micro controller type issue on front board .


    Anyone worked on these units ?
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    • zen
      Badcaps Veteran
      • Apr 2011
      • 511
      #2
      Re: AX9 Yamaha amp , no functions , schematic / advice please .

      Led myself astray on this one .

      Turned out to be the primary side of main transformer O/C

      Thermal fuse had popped .

      Strapped a Wickman T2.5A across the original for now just to test amp , then will find something more appropriate to use

      Amp now working .
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