Hi,
I acquired a 2445A a few years back and never switched it on until now. I am now starting to look at it for the first time and there are a couple of issues, but I have no scope fixing experience. Plus it's been a while since I did any fault finding on anything truly electronic.
So, I am trying to assess whether I should sell this on Ebay (UK) as a broken item, or whether I should take a shot at fixing it up.
I have powered it up and there are no reported faults, plus the scope traces appear as they should, as well as on screen characters. However, after a warm-up period (5-10 mins) the sweep stops and I am left with just a vertical trace. Using the J119 test points I can see that the supplies all look good with a DVM, but using Pico scope (laptop based scope) I can see some ripple on the supplies. I have yet to determine whether the ripple is in spec. (Though, I know where the info for that is in the manual)
Where do you think I should start with this? Should I just do a bulk capacitor swap out an ask questions later, or are there a few particular ones I should go for?
I should also say that some of the on-screen characters seem to get corrupted after a while as well.
Any opinions on where I should go with this would be appreciated.
Thanks
Paul
