Hi everyone,
I was gifted this scope (Meguro MO-1251) about 10 years ago, and it didn't get much use while the kids were small, but in recent years it's seen sporadic work.
Last time I turned it on, all appeared normal...except no trace
Tried a few power cycles, playing with the intensity, focus etc but nothing seems to help. The input amps etc appear to still be working, I can get it to trigger etc, but the CRT stays blank. I found a copy of the schematic online, so I do have some sort of guide to work from.
I've pulled it down enough to start checking things, should I be able to see the heater glow in the CRT? I guess my first step will be a basic power supply voltage check, but I'm unsure how I can test that the CRT hasn't gone belly-up (which would pretty much write this scope off, IMHO).
Prior to the lack of a trace, it used to take a good 5 minutes to get a visible trace on the screen, and even with focus adjustment, it was never the sharpest - is it likely the CRT has thrown in the towel?
Hoping to grab a few tips from the more experienced CRO people
cheers!
edit :
Whoops! It should be a MO-1252. Full Manual/schematic here :
http://www.manualslib.com/manual/235946/Elenco-Electronics-Mo-1252.html - see posts below.