Hi, i just got a nice Tek 2215 and started testing it to check if everything is working.
Everything is perfect, apart from the delayed timebase: seems like i just cant manage to make it work.
Now, i've never used a scope with a DTB, but after trying and trying again to play with the switches i cant get a magnified portion of a signal.
I feed a signal in;
I put the hor tb mode to ALT;
Pull out and rotate clockwise the tb control;
Nothing happens. If i select B hor mode i cant see anything at all. Am i missing something? Is the B sweep generator faulty (?)
I also noticed that the B delayed tb position control doesnt go lower than 0.4. Is that intentional?
Moreover, after being done with testing the scope, i decided to open it and do a visual check inside. I removed the back panel, unscrewed the screw on the right side on the scope, i cant slide off the cover. It got stuck after pulling it out for 5/7 cm, i tried to pull it out harder and made some progress, then i realized that cover was biting on the internal supports of the scope. "Screw that, i'm put it back again" and so i did. Now the situation got worse and i cant pull it out again easily for 5/7 cm like before. What is going on? Am i missing something? Should i spray some WD40 on the sides and try again?
Thank you in advance.
Update:
I managed to get the scope out of the cover by spraying some dry contact cleaner in the corners. The frame is badly scratched and marked, i cleaned it a bit to make it slide more easily.
Sorry, lighting is pretty bad.
PS: the dent on the trace is caused by a dent in the filter, crt is perfectly fine.