Sony Bravia T-Con Power Spike???? - AVS Forum
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post #1 of 3 Old 01-16-2014, 05:20 AM - Thread Starter
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Hi all!

 

I have been diagnosing what is wrong with my Sony bravia KDL-46XBR4 and took the entire t-con board off of the panel to inspect it. I decided to create a solder bridge across the top of the fuse because it appeared that the fuse may be bad. When I did so and hooked it up there was a noticeable change. I took my ohm meter and decided to put the positive side (with it switched to 20 DC) and put it on the back of the t-con fuse. The meter read, 3, 6, 10, 12.2, 1, 3, 5, 10, 12.1, 0 and while it was spiking up and back down I could hear a strange clicking sound on the t-con itself. At every very quiet click the power would drop back to zero or close to it. I tested the power coming into the UB1 board from the GF1 board and it was a steady 12.4, which I thought was a good sign it is not a power supply issue.

 

Next I tested the UB1 board and the power on this board was surging in the same way peaking and dropping back down to zero. When I would disconnect the LVDS cables the surging stopped, on both of the boards so I tested the power on the FB1 board and it was steady as well. Any ideas????? Im thinking t-con is bad, but would like to know before I drop some big bones on it to find out its the UB1 board which is easy to find and cheap.

 

Thanks!

Tony

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post #2 of 3 Old 01-16-2014, 07:56 AM
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Originally Posted by bigtony5858 View Post
 

Hi all!

 

I have been diagnosing what is wrong with my Sony bravia KDL-46XBR4 and took the entire t-con board off of the panel to inspect it. I decided to create a solder bridge across the top of the fuse because it appeared that the fuse may be bad.

 

....and if the fuse opened because of a short elsewhere in the chain, wouldn't you then hurt other components?


Well vinnie97, one of the kindest and most helpful and respected members here, was banned for silly reasons. And now vinnie_RIP is banned as well. The mark of an inexperienced moderator is to forget that their role is one of resource, not one of petulant authority and further that the members are doing the forum organization a favor by being here, not the other way around. They know darn well they screwed up here.
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post #3 of 3 Old 01-16-2014, 08:06 AM - Thread Starter
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....and if the fuse opened because of a short elsewhere in the chain, wouldn't you then hurt other components?

you are probably correct in that assumption.... not sure what i was thinking :(

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