Hi John,   
   I have a high on pin 11 of the 41C1/ST6225.   
      
   The scheme shows pin 11 going to pin 5 of 41C2. A reset option that I don't   
   see on my K99.   
      
   My pin 8 on the output amps is 4.3 vdc. I believe a 0 vdc or open is mute on.   
   So 4.3 vdc shouldn't be muting the amps 2LIC1 and 2RIC1   
   I have 0vdc on the internal speaker outputs at 2P12.   
      
   The MV coming from 3IC1 is 5 vdc at pin 12 but .7 vdc going into the mute   
   circuit.   
      
   I have 0vdc on pin 9/mute out of the NAND in the mute circuit. It shows that   
   coming from 51C6, scheme 5.   
      
   Could 3IC1 be a problem?  Is that chip available?   
      
   Thanks.   
   Glenn   
      
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