roothorick
Active member
So some time ago I mostly disassembled a U3000 then reassembled it inside my Pump. I left off the degaussing coil, and lo and behold, gaussing issues cropped up over time. So, hell with it, I took it partway back apart, put the coil on, and now my colors are perfect, but it's giving me a loud, obnoxious squeal. It looks like it's working perfectly, no visible picture problems (well, a pincushion that was always there and some minor convergence problems), but the noise is too much. It sounds kinda like the quiet whine of a standard res monitor, only very very LOUD. It seems to respond to the computer, so it must be coming from horizontal deflection... but hell if I know what to do about it.
This ring wasn't there when I had the coil off, but it doesn't seem to make a difference whether the coil is connected or not. I have to leave it alone for now because of another person in the house needing to sleep for an early shift this coming morning, but it's gonna eat at me all night. I was thinking about cleaning the legs on the chassis-mount transistor and its connector, or maybe wedging something into the flyback to see if it's ringing.
Thoughts? Suggestions?
-E- When the pizza guy came I took the opportunity to give it one last shot. I shuffled the main board over a little bit then turned it on, and lo and behold, the squeal was gone... for a while. I heard it again while I was in the kitchen. So, it's heat sensitive! Lovely.
This ring wasn't there when I had the coil off, but it doesn't seem to make a difference whether the coil is connected or not. I have to leave it alone for now because of another person in the house needing to sleep for an early shift this coming morning, but it's gonna eat at me all night. I was thinking about cleaning the legs on the chassis-mount transistor and its connector, or maybe wedging something into the flyback to see if it's ringing.
Thoughts? Suggestions?
-E- When the pizza guy came I took the opportunity to give it one last shot. I shuffled the main board over a little bit then turned it on, and lo and behold, the squeal was gone... for a while. I heard it again while I was in the kitchen. So, it's heat sensitive! Lovely.
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