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HomeJVC AV-27020 television that displays a thin horizontal line in the center of the screen - What the cause of it?LHUPA Posted Nov 19, 2009All it's perfect except this deflection trouble: a thin bright line in the center of the screen! Usually, in the most cases I have encountered about this deflection trouble, it was a defective electrolytic 100 volt capacitor in the deflection circuit. But for this JVC, I noticed that all of these (2) electrolytic capacitors have only loss about one microfarad under the real value! I think that's not enough to cause this trouble. What is this? The LA7832 IC? Which situation in the deflection circuit should cause this deflection problem? Thanks! LHUPA
1 comment
Re: JVC AV-27020 television that displays a thin horizontal line in the center of the screen - What the cause of it?JB38 Posted Nov 20, 2009The IC that you mention is the vertical drive chip, and this has either failed or has developed dry joints on its base as both are well known problems with this range of chassis, the usual practice is to replace the IC along with the C926 capacitor and any others associated with the circuit irrespective of what it / they might indicate on a capacitance meter, which its assumed you are using. |
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