I finely found a free cap coupled set to work on. My first.
A SX-770 with a amp smoking from one side.
The set was on its side so the smoke didn't give a clue to the side, so I am checking both sides of the board.
Power supply voltages check good.
The two amplifier, 2 amp fuses check good.
I removed and checked the outputs. All Good.
Checked the STV-3's. Good.
Lifted one leg and checked all the resistors. Good enough.
Replacing all the E caps.
Checked all the drivers and found only one bad. The Q7, 2SA569.
Does anyone have a good equivalent for this 2SA569? I did a google/ Audiokarma search but nothing really showed up. I'm still looking.
Thanks
A SX-770 with a amp smoking from one side.
The set was on its side so the smoke didn't give a clue to the side, so I am checking both sides of the board.
Power supply voltages check good.
The two amplifier, 2 amp fuses check good.
I removed and checked the outputs. All Good.
Checked the STV-3's. Good.
Lifted one leg and checked all the resistors. Good enough.
Replacing all the E caps.
Checked all the drivers and found only one bad. The Q7, 2SA569.
Does anyone have a good equivalent for this 2SA569? I did a google/ Audiokarma search but nothing really showed up. I'm still looking.
Thanks