NAD 3020 project, strip down and upgrade.

Member
Joined 2021
Paid Member
You will see the differences
 

Attachments

  • Screenshot_20230224_133503_com.mobisystems.office.jpg
    Screenshot_20230224_133503_com.mobisystems.office.jpg
    235 KB · Views: 63
  • Screenshot_20230224_133406_com.mobisystems.office.jpg
    Screenshot_20230224_133406_com.mobisystems.office.jpg
    216.8 KB · Views: 53
Guys, thanks for beeing so helpfull.

It is indeed ridiculous and very confusing.

The problem I ran against is that some of caps I pulled of the board are different values then the diagram I use.

Like C401 and C402. They are 10uf in my board. On none of the diagrams they are that value.

Also C911 and C912 are 10uf values in my amp.

The kit only came with three 10uf caps and two of them are now used for C421 and C422 like on the schematics Mooly shared.
 
That doesn’t look normal no, they might do that on the thicker traces where there’s more current flowing. In this instance it looks like the soldermask wasn’t applied correctly. It doesn’t matter, just make sure there’s no shorts. It might be a good idea to put some pcb coating on there.
 
Member
Joined 2021
Paid Member
Prob with the amp is the chassis, you can twist it, and you might notice some amps wobble with the base plate on. That's because you must put the middle 2 screws in first then the corners, but don't tighten up untill all are just tightened. So what happens is people twist the chassis with the base plate attached, and this will correct the shape, but an then crack the pcb