From: No.Spam@No.Where.com   
      
   "Adamfarber"  wrote in message   
   news:Adamfarber.65bc95d@audiobanter.com...   
   >   
   > David Nebenzahl;911263 Wrote:   
   >> On 6/13/2010 12:56 PM Adamfarber spake thus:   
   >> -   
   >> > Hi Mark, I unhooked everything and hooked up a speaker to one of the   
   >> > outputs and listened to FM and I still heard the him. Thanks, Adam-   
   >>   
   >> The "him"?   
   >> Oh, you must mean the "hymn".   
   >>   
   >>   
   >> Whoops, meant HUM, thanks, Adam   
      
   Most likely a cap in one of the low voltage supplies has failed, feeding   
   unfiltered   
   DC to a regulator which cannot maintain smooth output voltage because the input   
   is going to zero 120 times a second.   
      
   You have to be a technician with troubleshooting skills, experience with AV   
   receivers,   
   test equipment and service information to fix this.  Assuming that's not you,   
   the unit   
   needs to go to a Yamaha warranty station for repair (Yamaha's warranty   
   stations have   
   access not just to service manuals but also to confidential service bulletins,   
   and more   
   importantly they have access to the technical staff at Yamaha, which is the   
   only really   
   competent technical staff in the business).  I can call Allen at Yamaha, give   
   him the   
   model number, and he'll tell me what the problem is and how to fix it because   
   he and his   
   staff know their equipment that well.   
      
   Obviously, I work for a Yamaha warranty station.  That's the only company we   
   still do   
   warranty audio work for, because it's the only one with a staff that knows a   
   damn thing   
   about their product.  Well, them and McIntosh, but there are no Mac dealers   
   around here,   
   so they don't figure they need a warranty station here (Reno, NV).   
      
   Fred   
      
   > --   
   > Adamfarber   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)