Nov 30, 2019, 8:54 PM
Post #1 of 6
Wanting to tune up a blurry Toshiba 51H83 CRT, is it feasible?
So we've had a Toshiba 51H83 CRT TV sitting in our basement since forever ago. My mother had an idea to give it to some friends of ours to put in their cottage up north, so I wanted to see if it was serviceable - that, and I'm just a sucker for seeing if I can fix things. ;P It works, and the picture is bright, but there is a noticeable blurriness to it, even when hooked up via the DVI input. I hooked up a RetroPie to it to test, and you can see the fuzzy blue halo pictured here: https://i.imgur.com/Jqq0w7k.jpg
It's not terrible, but if I'm going to hand it off to our friends, I'd prefer to see if I can tune the image first. I have already fuddled with the RGB "focus" adjustment screws as well as checked the convergence, both of which are not the source of the problem.
You can find the service manual for the 51H83 here: https://www.manualslib.com/manual/684111/Toshiba-51h83.html?page=9#manual
Now, I don't really know exactly how CRTs work with respect to maintenance/repair, that is to say I don't know what in the component chain is causing this blur or if it's possible/feasible to fix it. I wanted to fish for some advice before I attempt the repair and/or look around for any replacement parts. As a token of reassurance, I am aware of the dangers of poking around inside of a CRT, including the capacitors that will remain charged for days.