Welcome to the forum.
Did you get in the same country you are from? Put your country flag in your profile.
Ask the seller what voltage it was set for.
With old equipment it's always best to get a Service manual if you ever need to fix it which is highly likely.
Post pics of the voltage selector options,
Thanks.
Actually my grandpa got it for me, in my own country. It should've been set for the correct voltage...
The previous owner didn't know very much about it, he didn't even know if it worked.
I can't really seem to find much about this oscilloscope.. do you happen to know where to search for service manuals?
I have added a picture of the voltage selector to the dropbox album. I think it's set to 220V, but when I plug it in and crank up the intensity, I can't see anything on the display. Are there any voltages that I can/should measure?