Sony Bravia KD-50X690E blown resistor

[R_J]

If you look at the datasheet you will see the circuit, it is likely that the ic has been damaged, like I said, check the gate resistors and diodes to start.

[x_orange90_x]

If you look at the datasheet you will see the circuit, it is likely that the ic has been damaged, like I said, check the gate resistors and diodes to start.

I have no continuity on the following:

R8602
R8603
R8604
R8614
R8617
ZD8601

Is it possible that one bad one can take out the rest? Or does this indicate that the spike went all the way through to the chip?

[nomoresonys]

Maybe check those in ohm mode and compare to expected values.

[x_orange90_x]

Maybe check those in ohm mode and compare to expected values.

I just checked and they all are close with the exception of R8603 and R8604. They are 1504 resistors which are 1.5M Ohm, and I'm getting .995-1.005M Ohm on them.

[nomoresonys]

They do seem to be out of tolerance.

[x_orange90_x]

They do seem to be out of tolerance.

I thought the same, they're about 2/3 of the expected value. I'm leery to say that they are the cause however.

[nomoresonys]

I don't know but have seen strange things from even slightly out of spec resistors, seems like they have been making the tvs too sensitive, is it the feedback section. I think sony is one of the biggest offenders of that.

[nomoresonys]

I don't know if it's the designers that are not totally competent or they are trying their hardest to make the tvs go to shit just out of warranty. I know one thing if a tv goes out on me right after warranty, I'm definitely not going right back to the same brand.

[x_orange90_x]

I don't know if it's the designers that are not totally competent or they are trying their hardest to make the tvs go to shit just out of warranty. I know one thing if a tv goes out on me right after warranty, I'm definitely not going right back to the same brand.

Still haven't figured this out, but I haven't really messed with it anymore either. I'm thinking about ordering that board for $30 and HOPEFULLY get it working. At the start of this I checked the backlights with my tester and they lit. Hopefully they haven't gotten damaged since, somehow.

[nomoresonys]

I see, 30 bux isn't bad for a 50 inch sony, they do have a nice picture imo.

[x_orange90_x]

I see, 30 bux isn't bad for a 50 inch sony, they do have a nice picture imo.

I'm going to sell it if I get it going. I'm a little reluctant to buy the board though 😩

So you like the picture on them, but you just don't want them anymore? 😏

[nomoresonys]

Lol, They are not a bad tv, I just have no luck with them.

[x_orange90_x]

So I have an update to share. I bought that board from eBay and the TV is alive again! However there is a caveat: a mystical black line that appears and disappears. It seems related to the OSD as well because the 4K X Reality bar across the bottom pops up randomly and brings the line with it.. When that banner goes away the line goes away too. I don't have a remote for it so I can't get into settings to play with anything. It's acting like it's in demo mode or something because it fades in a banner at the top as well that does the available streaming apps. I'm not sure if this is a panel issue, seems like it's not because the line comes and goes with those banners.

[x_orange90_x]

Nevermind, I'm an idiot! It IS in demo mode. The line is there to show two have of the image, one with a feature ON and the other half with it OFF.

I guess I need to get a remote then so I can get it out of demo mode.