Can someone identify these DOA pcb's ?

[Rob Flinn]

Hello All

Somebody sent me these DOA pcb's for free & I have no idea who they came from or what they are supposed to be.    Can anyone identify them & if so do you have the documentation ?

Thanks Rob

 

[moamps]

2520

 

[Rob Flinn]

2520

Yes. I guessed that much, I just have no idea what parts go where ......

 

[moamps]

Come on, Rob, just google API 2520 schematic, and check out which type of transistors are used for the footprint on PCB, (I believe it is BC550C/560C footprint, output transistors can be BD139,140).  Or use BOOM from Capi
https://capi-gear.com/catalog/images/gallery/opamps/gar2520/2520v4.1_manual.pdf