Question about Televison & Video
I can't believe it. I have the same problem. I blamed it on my parrot and cross wiring. I thought because he ate the wiring a bit and this was the problem and it blew out the set. It seems to be not the case. I can't get the audio board for my tv from Dell (same thing send it to their servicing out in Ohio) and Dell says they don't make the part anymore which is ******** and I have someone that will repair it. I want to fix this one not buy a new set. It is only 3 years old.
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Posted on Jan 02, 2017
SOURCE: Sharp TV Audio Problem
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 (I used rubbing alcohol which worked quite well). Sharp has issued a service bulletin addressing this issue (LCDTV-194) wherein a ‘2502 Heat Kit’ is specified. This kit is Sharp Part Number: PSPKIT663WJZZ and is available from circuitcity.partsearch.com for $19.95. However, it’s entirely possible to get by with the heat pad only, Sharp Part Number: PSPAZA663WJKZ for only $9.95. Please note that board replacement for this problem is almost never necessary, so if you’re working with a repair technician be sure and insist that he/she be certain to try cleaning the old board and replacing the aforementioned heatsink pads before charging you for a new board.
If one is reasonably familiar with electronics disassembly/reassembly and is willing to take their time, this can even be a DIY project. It is possible to find ‘important service references’ by simply entering LC26D4U (the 5, 6, and 7 series are very similar, and this information covers all screen sizes) into the search field at eserviceinfo.com. This will greatly aid in disassembly/reassembly of the TV, as the A/V board is somewhat ‘buried’ under other boards. Please refer to post # 373 at avsforum.com/avs-vb/showthread.php?t=647174&page=13 for pics of the information detailed here.
Particular thanks are owed ‘Aureius’ of the AVS forums for his research efforts concerning this issue !
Posted on Jan 28, 2009
SOURCE: scratched 32" screen
Your third option is to repair the scratches ! If you search you can find products sold to do just that.
One example is http://www.janvil.com/plastic_polish.htm?gclid=CO_f08iL75gCFQ0gQgodpEm00g
What ever product you try, you should try it on a small inconspicuous place first to see if it works. The idea is to get the scratches to be invisible with the tv on so test it that way. Search for more products - this was only one I found. I am not affiliated with that company.
Posted on Feb 22, 2009
The audio amplifier board has a number of components covered with a tough brown waxy, rubbery potting compound. Very careful and tedious removal of this compound exposed many corroded component solder joints. The problem created by this potting technique is apparently a common problem with this sound board. In my case cleaning the corrosion of the circuit board proved to correct the sound failure problem. (Not for the faint of heart).
Posted on Jul 13, 2009
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