Video and/or Power problem - Suggestions please!
Re: Video and/or Power problem - Suggestions please!
Looks like the VP12 line is being ground by UHF can (top track in image under M1 legend).
Though I don't understand why IC28 would overheat David
Re: Video and/or Power problem - Suggestions please!
12v is used by the video colour encoder chip - 1377Silvester wrote:Looks like the VP12 line is being ground by UHF can (top track in image under M1 legend).
VP12track.JPG
Though I don't understand why IC28 would overheat
Re: Video and/or Power problem - Suggestions please!
Yes, but I don't understand how shorting +12V to ground (if that is what happened) would cause IC28 to overheat.Pr0f wrote:12v is used by the video colour encoder chip - 1377Silvester wrote:Looks like the VP12 line is being ground by UHF can (top track in image under M1 legend).
VP12track.JPG
Though I don't understand why IC28 would overheat
David
Re: Video and/or Power problem - Suggestions please!
I did have a poke around to see what might actually be interfering - it's actually the bottom of the can pressing down (component side) but it wasn't at all obvious. I've placed a strip of plasticard under that edge of the can for now. I'd imagine finding out for sure would involve removing the can - not sure I can be bothered with that, and am now away for a few weeks. As long as it works I'm happy although I'd still like to get to the bottom of it.