GOULD OSCILLOSCOPE OS4020

[Band_Gap_Bruce]

I need a service manual for this ancient digital storage scope. Can anyone help please?

 

[shrtrnd]

Did you Google the mfgr and model number to see what's out there?

 

[Band_Gap_Bruce]

Yes I did expressed in various alternative ways. Not a single result. Did get some for model OS4000 though. I think the OS4020 must have been a small production run hence not much about.
Thanks BGB