Question about Sony KV-35S42 35" TV

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TV won't power up after surge

I have a 2000 sony trinitron KV-35S42 that hasn't worked since a power surge. The continuous blinking lights indicate something about Jungle IC 301, and was told on a previous post here that it needed a new board. I have some soldering experience with circuit boards, but not actual TV repair experience. I would love to try to tackle this repair, because the TV is so darn big, and to have someone come to the house could invest that money in a new set. Please help.

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  • Thomas Rehm Aug 14, 2007

    I don't have an OHM meter, and am really not sure how to use it. I have some soldering experience 20 years ago, but that is really the extent of it. I consider myself handy, willing to learn. I am also cheap, and this set is sooo big and heavy I want to try and fix it.

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Try this: unplug the set and wait about 10 or 20 minutes. This is to make sure that the main power supply filter caps completely discharge. Look on the power supply board, close to where the AC cord attaches to the board. Look for a white resistor labeled "0.1 OHM" (the symbol for OHM, like an upside-down U) and measure it with your ohm meter. If it is open then your switching transistors in the main power supply are most certainly shorted. Older sets had 2 separate transistors on little heat sinks labeled "C4834", then they switched to 2 transistors in one package labeled "MX0841" or "MX0842", and then some sets went to two separate MOSFET transistors. Measure those parts and post your results and we will guide you from there.

Posted on Aug 09, 2007

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