From: no@dress.invalid   
      
   Fred wrote:   
      
   > If replacing these caps doesn't eliminate the hum, or if all this sounds   
   > way over your head, it's either off to a warranty station with the unit,   
   > or off to the   
   > electronics store in search of a replacement.  I would expect repair to   
   > cost   
   > between $100 & $200.  This is a pretty old unit; the service manual was   
   > printed   
   > on paper.  These days everything is in PDF on the computer.   
      
   Fred,   
   if you think that is old, I have an AX-630 which drops one or both channels   
   intermittently.  During the dropout, the audio is low and distorted with   
   mostly just buzzing.  Increasing the volume sometimes breaks through the   
   distortion and the problem goes away for a time.  The unit has an AST pack,   
   so replacing just the amp (which otherwise sounds great when it is working)   
   would require new speakers.   
      
   Any ideas what might be wrong with it?  Reseating the wires external and   
   internal does not seem to result in a fix.  Mostly happens while using the   
   tuner, a TX-400U - which had a bad solder joint on the output that was   
   fixed a few years ago.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)