Re: Sharp LC-60LE752E Panel shorted?
Y cof。 It's broken，this SHARP common failing，remove the Y cof
Y cof。 It's broken，this SHARP common failing，remove the Y cof
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Re: Sharp LC-60LE752E Panel shorted?
You can also replace a piece of Y cof with a machine.Last edited by SMDFlea; 03-06-2023, 05:38 PM.Comment
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Re: Sharp LC-60LE752E Panel shorted?
It's all in this excellent thread by Freakafter8, need to do the testing because it's not reversible, many times you can see the bad cof, it may be hotter or blacker or misshapen maybe have a hole or black spot nearby: https://www.badcaps.net/forum/showth...ht=freakafter8Comment
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Re: Sharp LC-60LE752E Panel shorted?
Sorry if is a dumb question, but just to confirm, you mean to remove the tabs on the right side (viewing from the front), just like @mkkillah did on the #15 post? My panel is exactly the same of him.
Yup. I read that thread, very interesting indeed. But in that situations, the panel of 70'' is different from 60''. Although a user reports in that same thread that the same logic can be done for 60'' cases and that obviously in any case it is not reversible. Maybe I have no choice but to take the risk. After all, in the current state it cannot be used like this.
Thanks for your time guys.Comment
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Re: Sharp LC-60LE752E Panel shorted?
yep, applies to both sizes, I would take the cautious route and try to identify the bad cof, will prolly have one of the tell tale signs I wrote above.Comment
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Re: Sharp LC-60LE752E Panel shorted?
They're talking it over in this thread too: https://www.badcaps.net/forum/showthread.php?t=50170Comment
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Re: Sharp LC-60LE752E Panel shorted?
Thanks, mate. I will follow the recommendation and before applying surgery I will try to disassemble the frame and touch the side COFs to see if any have suspicious marks or if they get hotter than normal.
In any case, I will attach photos in this way tomorrow ASAP.
Thanks in advance.Comment
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Re: Sharp LC-60LE752E Panel shorted?
Alright guys, I'm going to update you.
I disassembled the frame and when verifying the side COF Chip none shows a noticeable heating, but when assembling the frame it fails after a few minutes. This makes me think that when the TV has the metal frames (which hold the panel) and also the plastic frame (where the TV brand comes out). As there is no ventilation, the COF Chip collapses and shows the fault.
It was a risky move on my part, but since many had reported simply removing the side COFs that present the issue, I just took the risk and removed them. Fortunately in my case, this fixed the root problem.
The TV has already been running for several hours without showing the blurry image that I attached in post #40.
I only have to thank everyone in the forum for contributing with their help and knowledge that allows us to rescue (at least for a while longer) a TV that does not stop costing good money in my country.
The first image shows the TV with the fault.
In the second, the retired Chip COF side.
In the third, the TV in its current state.Attached FilesLast edited by skynetronics; 03-06-2023, 10:54 AM.Comment
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Re: Sharp LC-60LE752E Panel shorted?
Looks good, nice save.
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This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.
I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match... -
My goal here is to be able to use boards on hand to swap into faulty sets when the faulty board is not obvious.
I will start by asking what is the format of the output from the mainboard and is it generic in any way or does it vary by manufacturer and/or model ?
And as far as I know a tcon and panel must be a matching pair because the timing of the signals and the voltages required to drive the panel are specific to the panel itself. (That may be a blanket statement that isn't true in some cases where the panel creates its own sub-voltages on its panel boards?)...01-06-2024, 01:32 PM -
TV came on with BL on but blank screen. Disconnected one of the ribbon cables from tcon to panel driver board and now I have half of the screen working normally. Any way to tell if the problem is with the tcon or the panel driver board or the panel itself? Should I just replace the tcon and see what happens? -
Hi fellas, I have a Toshiba 50u6863db (vestel crap) here belonging to a family member.
The TV was given me to repair (possibly) as it had developed a blank screen, just back lights and sound.
Upon further investigation it turned out one of her cats had sprayed on the screen as I could see it on the edge of the panel and tabs and it stank. Looks like it probably shorted the circuitry. I cleaned it up and still the same.
I initially suspected Tcon board as none of the test points were showing correct voltages. Tried removing one LVDS cable at a time, same result.... -
It's been a while since I've checked in here or needed input on narrowing down what to replace on a TV repair, but I've got one on my bench now that has me wondering. The lack of part (board) availability means I may need to do some component-level diagnostics, and a second opinion is always good when it comes to that.
The issue - Sharp LC-80LE844U does not display. Power light comes on for a while, then you can hear a relay click off and the light blinks twice slow, then five times fast. Service manual points to 'Panel Power Supply Error' with this code, but isn't much more help...
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