Nad 3020

[tube-a-lou]

Hi all,

I've been working on this amp and today I received the new output transistors and put them
in, with the same problem the left works but the right channel there's only a not to loud hum/buzz sound.
I know I'm missing something, help is needed.

 

[mbz]

Check DC voltage at right speaker posts.
Did you check bias as per service manual?

 

[tube-a-lou]

I'm afraid I'll blow it up.

 

[slimecity]

Build a dim bulb tester to test it.

What type of replacement outputs did you put in and why did you replace them?

 

[tube-a-lou]

I ordered them from Mouser there the On Semi 2n3055g and MJ2955G, the ones in there didn't match and the worst thing someone remove the
RX-1/ RX-2 resistor's to set idle current, now I don't know what the heck was in there!