Question about Sharp LC-26D4U 26 in. LCD Television
Almost all intermittent audio or audio failure problems with Sharp Aquos LC**D4U, LC**D5U, LC**D6U, and LC**D7U televisions are the result of a relatively simple design flaw involving the heatsink pad compound used on the Tripath TA-2024 amplifier chip (IC2502) found on the A/V board. This compound has a fairly low melting point and, over time, tends to seep out from between both top and bottom heatsinks onto the legs of this chip as well as onto circuitry immediately surrounding it. Further, over time the seeping compound also becomes somewhat conductive creating bridges which short the audio amplifier circuit causing everything from intermittent audio to complete audio failure.
Fortunately, in almost every case audio can be completely restored by cleaning the old compound from both top/bottom heatsinks and from both sides of the PC board in the area immediately surrounding the chip (rubbing alcohol works quite well). Despite what the images say,
YOU MUST REMOVE ALL BLACK RESIDUE FROM BOARD. IT WILL NOT WORK IF ALL THE RESIDUE IS NOT REMOVED.
This kit is Sharp Part Number: PSPKIT663WJZZ and is available from Partstore.com for $19.95. http://www.partstore.com/Part/Sharp/Sharp/PSPKIT663WJZZ/New.aspx
It’s possible to get the heat pad only, Sharp Part Number: PSPAZA663WJKZ for only $9.95. http://www.partstore.com/PartSearch.aspx?PartNumber=PSPAZA663WJKZ&hiddenInputToUpdateATBuffer_CommonToolkitScripts=1&x=26&y=14
Posted on Jun 21, 2009
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Posted on Jan 02, 2017
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