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Old 05-18-2018, 06:57 PM   #3
guix
New Member
 
Join Date: May 2018
City & State: Troyes
My Country: France
I'm a: Knowledge Seeker
Posts: 19
Default Re: Short circuit on Y Buffer board, or bad panel ?

Hello,

So you are saying it is normal to have shorts here, and so this Y Buffer board looks fine ? As I'm still new to electronic, can you explain the purpose of this diode and those 22 ohm resistors, which looks totally useless to me since they are basically shorted and electrons won't bother to go through them ?

And what could have caused the two Y Main boards to fail then, if the Y buffer is ok and Va and Vs are fine too..? Could it be a problem with X Main board, on which I have not find any shorts or exploded components ?

I have removed all components that were shorted on the original Y Main board, so there is no short anymore on that board, but do I just replace these components and the capacitor that exploded, and the board should work again ?

All components removed in the picture above need to be replaced, except the four big capacitors (I needed to remove them to remove the screws on the heatsink), and the big diode which tested fine as shown in this picture:


And sorry that I forgot to put the TV model in title, but I can't edit it...
Attached Images
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File Type: jpg 20180428_105825.jpg (500.5 KB, 17 views)
File Type: jpg 20180508_134437.jpg (546.8 KB, 12 views)

Last edited by guix; 05-18-2018 at 07:33 PM..
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