From: James Sweet on 5 Jun 2007 19:45 "Peabody" <waybackNO784SPAM44(a)yahoo.com> wrote in message news:iem9i.428159$2Q1.364476(a)newsfe16.lga... >I have JVC model AV-27920 television that goes back a few years. > > A few months ago, I began having a problem at the top of the screen. > It's hard to describe, but it looks like to top part of the image is > folded over and displayed upside down. I guess it looks like the > the vertical isn't quite making it all the way to the top before the > lines start being displayed. > > At first this occurred only when the TV was first turned on, > affecting the top couple inches. As the set warmed up over 10 > minutes or so, this would gradually shrink, and finally all > disappear, and everything looked normal. Nothing strange happens at > the bottom fo the screen. > > Now, the foldover when cold covers more of the screen, and it no > longer goes away completely when warm. > > I actually have the Sams schematic on this from folder 4080, and I'm > hoping that whatever is failing is something I can replace. An > electrolytic maybe? > > I don't have any test equipment, but am competent to remove, test, > and replace things. So perhaps someone can suggest what to look > for. I would appreciate any educated suggestions, either in general > or with reference to functions I can find on the schematic. > > Thanks very much. > Electrolytic capacitors around the vertical output IC, they'll be smallish, probably 1-10 uF at about 50V and usually there will be 2 or 3 that need replacing.
From: Malissa Baldwin on 5 Jun 2007 22:41 On Jun 5, 7:21 pm, Peabody <waybackNO784SPA...(a)yahoo.com> wrote: > I have JVC model AV-27920 television that goes back a few years. > > A few months ago, I began having a problem at the top of the screen. > It's hard to describe, but it looks like to top part of the image is > folded over and displayed upside down. I guess it looks like the > the vertical isn't quite making it all the way to the top before the > lines start being displayed. > > At first this occurred only when the TV was first turned on, > affecting the top couple inches. As the set warmed up over 10 > minutes or so, this would gradually shrink, and finally all > disappear, and everything looked normal. Nothing strange happens at > the bottom fo the screen. > > Now, the foldover when cold covers more of the screen, and it no > longer goes away completely when warm. > > I actually have the Sams schematic on this from folder 4080, and I'm > hoping that whatever is failing is something I can replace. An > electrolytic maybe? > > I don't have any test equipment, but am competent to remove, test, > and replace things. So perhaps someone can suggest what to look > for. I would appreciate any educated suggestions, either in general > or with reference to functions I can find on the schematic. > > Thanks very much. If you had tried Google before you posted then you would have found out that the TV is broken and you need to buy a new one.
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