Question about JVC AV-36F802 36" TV

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JVC AV-36F802 Shuts off after turning on, then red timer on light flashes.

This set started out with a few white horizontal lines across the top of the screen and then over time the number of lines increased until there was about 6 or 7 inches of them across the top of the screen. Then one day the set was turned on and it shut itself off, next the red timer on light started flashing steadily. I tried unplugging it for a day and then plugging it back in to reset it, to no avail. Now all it does is shut itself off when plugged in and the red timer light flashes. My wife said it had shut itself off in the past.
I am pretty good with electronics and would appreciate any help pointing me in the right direction. Not sure if the set has one problem of two. If you could suggest component(s) to check and or an area of the circuit board I would be very grateful.
thanks in advance :-)

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Re: JVC AV-36F802 Shuts off after turning on, then red...

You are describing Vertical sweep failure.
It will be an I.C. with a part number that probably starts with an LA_ _ _ _ and be on a heat sink in the vicinity of the connector going up to the yoke. Try replacing that. But first, check all the electrolytic caps around it for testing dry (sorry - takes a special meter to do it in circuit) or just replace them. May have lost power to the I.C. as well. Look the I.C. up in the free NTE cross reference at Get a diagram of its pinout to find what pins the power and outputs are on.
Hope ya fix it!

Posted on Jan 09, 2008

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