Quote:
Originally Posted by vol.2
That means nothing. Many, possibly most, cracked solder joints can only be seen with a microscope. What happens is that they heat up and expand as and then start to develop a layer of corrosion at the interface
You could have cracked solder joints all over the place and end up chasing your tail around looking for a ghost
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Fair point, I could try to reflow all of the solder joints. It would be a tedious task, but an important one when diagnosing. I might need to print out an image of the board to mark the solder joints I've reflowed, so I don't miss any.
I've tried giving it the percussive maintenance by lightly tapping the board with the back of my screwdriver while powered on to see if there is any cracked joints. Probably made more cracked joints by doing that.
I want to get this thing to work again, it's just a matter of not giving up. For most people it's not worth the time and effort, but for me it's a learning experience and a way to save a CRT which I think is important. I've fixed several other CRTs, but they have had clear symptoms and usually have had a simple fix like a visible cracked solder joint or a leaky capacitor.
Thanks for the moral support, it really helps!
Next thing would be to focus more on getting the schematics. Someone somewhere probably have them in paper format, I might have to ask around.
EDIT: Oh and I forgot to mention that I could hear the degaussing coil on a cold startup, so that works at least.