Question about Sharp LC-26D6U 26 in. LCD Television
The A / V board part number is: XD352WJ
If you want to try and repair this yourself, you most probably do not have to replace the board. See the following:
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 partstore.com for $19.95. However, it is entirely possible to get by with the heat pad only, Sharp Part Number: PSPAZA663WJKZ for only $9.95, also from partstore.com. Please note that board replacement for this problem is almost never necessary, so if you are 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 things slowly, this can even be a DIY project. One can 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 also refer to post # 373 at: avsforum.com/avs-vb/showthread.php?t=647174&page=13 for some pics of the information detailed here.
My knowledge of how to solve this issue came primarily from finding the research efforts of Aureius on the AVS forums, and particularly from his taking the time to post the solution publicly so that others might save time, money, and aggravation. I am just passing along the information. Thanks Andy!
I also wanted to mention that a couple of other very pesky common problems with these series of Sharp TVs involving symptoms of random powering-off and/or powering-on, and function lock-ups of various sorts are easily remedied through two firmware updates (Main CPU: PH1UU112, Monitor: MD1UA104). These are not available to end-users via the internet but it may be possible to get the files from an understanding factory-authorized repair tech. They are installed using an SD memory card (don't use the HC high capacity sort, use only those that are NOT HC) which is inserted into a special slot in the back of the machine. Again, for those of the DIY persuasion, information about how to check whether your TV has old firmware in need of an upgrade is readily available through internet search.
Posted on Oct 29, 2009
You don't even have to worry about what the part number for this issue. Sharp is taking care of this for customers even if you are out of warranty due to a mistake on how they made the tv. All you have to do is call Sharp at 1-800-237-4277. It took my repair in NYC (MTZ electronics) shop 1 day to fix the issue. MTZ electronics even applied 2 firmware updates that all the D6U tv's need to avoid other known issues with the lcd in the future. These firmware updates are for the main cpu PH1UU112 and the monitor MD1UA104. I am so happy and am loyal to Sharp for their fantastic customer service. I also want to thank MTZ electronics for having the best customer service and being the best repair shop I have ever been to. Good luck everyone
Posted on Oct 07, 2009
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Posted on Jan 02, 2017
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Feb 14, 2017 | Sharp LC-26D6U 26 in. LCD Television
Jun 22, 2013 | Sharp LC-26D6U 26 in. LCD Television
Let verify first to narrow down to where the problem can be. First, make sure the MUTE or SAP function is not activated, then check the on screen sound set up menu to make sure the speakers are not set to OFF. If the setting is OK, then attach the powered PC speakers to the Audio Line out RCA jacks (Red and White) to see if you can get the sound there, if you do, then the problem can be in the power amp circuits, if you do not get the sound at RCA jacks, then the problem can be in the sound processor circuit.
Please post back what you find.
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
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