Re: Sharp Aquos 70" LED LC-70LE632U does not power on
I should have some spare diodes and I can mail one to you (I hope I can remember where I left). Send me your mailing address by PM. In fact, I am local to you in the triangle area....
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
Bumping my thread since the site was down for maintenance when I posted the resolution.
Thank you all for your help in troubleshooting. It indeed was the diode that was causing the TV to not power up. My TV is now back up and running with the new diode.
I have a few extra SB2100 diodes for free, in case someone needs them for their repair.
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
I replaced the bad diode with a new one and powered the TV and it works. Thank you all for all your tips and help without which I could not have done it.
I have a question on the SB2100 diode that I replaced. When I test the diode on the multimeter, it reads .347 both in circuit and out of circuit. Is this okay?
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
I am fairly new to soldering. A couple of questions:[LIST=1][*]To desolder an existing diode from a board, do you heat the joint from the front side or the back side of the board to melt the solder? A youtube video said you should add some new solder to help desolder an existing component. Is this true?[*]When you install a new diode, do you solder on the front side, back side or both?[/LIST]- Re: Sharp Aquos 70" LED LC-70LE632U does not power on
I am fairly new to soldering.
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- Re: Sharp Aquos 70" LED LC-70LE632U does not power on
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
Ordered the diode, it will take 10-15 days for delivery.
When I get it, should I do the following?
[LIST][*]Desolder the old diode and remove it[*]Cut the ends of the new diode to the same length as the old diode[*]Orient the new diode the same way as the old diode and solder it [*]Install the board[*]Connect the cables back and plug in the power cord[/LIST]
Is there any thing else I need to know?
[B]Budm[/B]: Thanks a lot for all your tutorials. Very well written. I read all...Last edited by Teletubbie; 12-30-2015, 10:36 AM.
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
I can order it [URL="http://www.aliexpress.com/item/SB2100-E3-73-SB2100-DO15-New-original/32553550943.html"]here[/URL] for $3.50 (lot of 10) with free shipping but it takes 10-15 days for delivery.Re: Sharp Aquos 70" LED LC-70LE632U does not power on
I can order it [URL="http://www.aliexpress.com/item/SB2100-E3-73-SB2100-DO15-New-original/32553550943.html"]here[/URL] for $3.50 (lot of 10) with free shipping but it takes 10-15 days for delivery.Re: Sharp Aquos 70" LED LC-70LE632U
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
Power Board Testing
I tested the voltage at the input point and it checked out okay at 123V. The fuse also tested okay.
Did a visual inspection of the capacitors and there is no obvious bulging or leaks.
I set the multimeter to Diode mode and all the diodes on the board tested around .45 V except the one marked in red in the attachment which showed 0.
I am assuming the components marked with FB on the board are ferrite bead and they appear like a diodes with a solid black...Last edited by Teletubbie; 12-28-2015, 09:18 PM.
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
Tried the reset procedure and there is no response from the TV.
Should I power up the TV when I check the voltage?
Here is a higher resolution image of the power board from ShopJimmy....Last edited by Teletubbie; 12-28-2015, 02:36 PM.
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Re: Sharp Aquos 70" LED LC-70LE632U does not power on
Disconnected the cable from T-con to the main board and it did not power up.
There are two more ribbon cables that run from T-con to the bottom of the TV panel. Not sure how to disconnect them; cannot find any tabs to press. I do not want to try something and damage that cable. Any suggestion how to disconnect the T-con ribbon cables?
Edit: Found out [URL="http://electronicshelponline.blogspot.com/2014/01/how-to-remove-t-con-board-lg42lh50-eefl.html"]here[/URL] how to disconnect those ribbon...Last edited by Teletubbie; 12-27-2015, 06:28 PM.
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