The Fisher Saga Continues....It's ALIVE!

 Well, at least it didn't go up in smoke when I brought it up on the variac!

And now we go into troubleshooting the Power Amplifier Board, the original problem that brought the receiver here.

This board has six undocumented changes from the schematics in the Service Manual.

1 - Four 10uF capacitors, two each on the STK-0080 "Darlington Power Packs".

2 - Two small inductors on the bottom of the board.

3- An "extra" transistor on each driver transistor

4- An extra resistor in each channel.

5 - A resistor that doesn't go to the designated pad in each channel.

6 - A capacitor/resistor network mounted to the chassis, with "flying leads" going to the board. The capacitor is the out-of-focus blue cylinder handing in midair.

Things like this, along with the haphazard layout of the board (parts are scattered everywhere, part numbering is odd, etc) makes troubleshooting tedious.

This shows "Q17" with an extra resistor, and an extra transistor stuck into some of the holes for Q17. Resistor "R03" is also not going to where it looks like it should go. These are most of the major changes Sanyo made that I have to figure out.

Yes, it needed a lot more work than I anticipated, but that's why people bring me these things to fix. At least I'm down to one circuit board, which to me is the Light At The End Of The Tunnel.