I've recently purchased a NRI-2500 Oscilloscope from eBay for about $13. Amazingly, it actually works, however the signal displayed is on a slant from bottom left to top right at what I'm guessing is about 15 degrees so the ground does not line up in the center as it should. I plan on opening it up to see if mishandling resulted in knocking the CRT display out of sync. My main concern on here, though, is to probe the minds of my fellow gurus and see if anyone has access to the technical manual for this particular O-scope. I have the schematic already, as that is all that I can find

 

Hello,

You might want to look here:
http://www.eserviceinfo.com/downloadsm/36288/NRI_2500.html

Bertus

 

Thanks, I have the schematic printed out but the actual manual still alludes me. I'm starting to think it doesn't exist.

 

http://elektrotanya.com/nri_2500_oscilloscope_schematic_sch.pdf/download.html