NAD 7150 replacement output transistors

[johng99]

I need to replace the output transistors for my NAD 7150. The originals are
Sanken 2sa1215 and 2sc2921. Anyone know what I can replace them with?

Thanks for your help. Great forum.

JG

 

[cademan]

Just curious, are the originals bad?

 

[johng99]

Yes, according to my youtubed knowledge of reading pnp and npn with a meter. Issue is blown fuses at power. I have done some recapping.

 

[cademan]

Only one or two in the left or right channels might be shorted but not all of them.

Have you got any pics of the unit? Does it use two or four output transistors per channel?

Did the fuse start blowing before or after some recapping?

 

[johng99]

Hi, here are a couple pics, the 4 OP's, and the tuner pcb showing fuse slots and 3 new caps.
And yes fuses blown after recapping.
There is power to the unit, i.e. the soft clipping light works.

 

[cademan]

Check to make sure none of your new capacitors are in backwards. Double check your work.