I'm sure this has been discussed ad infinitum. I did a search and tried weeding through all the posts, but couldn't really distille the info down to the lastest and greatest.

I'm planning on dissecting the N1600s that came with the 604Ds. Apparently they are the same model number, but the chassis are a different size. I will likely want to replace the 16uF caps and pots if they look original. I don't think there is much else in there that might need attention.

I found this:

13

Is this the schematic I should be working from, or is there a better option?