Sony KDL-46ex700 led replacement still same issue

[labello]

[QUOTE=Davi.p;n3505982]This is a more complex scheme than usual ones, like Sony habits, i can't read well from photos on a cellular, sorry, but i'm almost sure you'll find the 2 components burnt..[/QUOTE

Hi, 2 component burn? I find only one the fuse..If you tell me what side of the board you need, I'll try my best to get a good picture. Anyway, what's the right replacement fuse? i will buy

[Davi.p]

no , i haven't asked more photos!... read well back posts, i asked to check components..

[labello]

no , i haven't asked more photos!... read well back posts, i asked to check components..

Okok I'll do it after lunch that I have a bit time

[labello]

test Q6814 (TO220), R6850 (2W resistor)

Hi resistor 2w give me this results you can see the picture, the q6814 test okay

[labello]

The tv is completely dead, i take some measurements and i have wrong results , relè doesn't want to turn it on . I really don't know what's going on now..😔 Thanks

[Davi.p]

Watch under the big inductance L6800, under side, a little higher, there are 4 smd diodes, check them and also on top left zone, the 2 power smd mosfets..

[Diah]

The tv is completely dead, i take some measurements and i have wrong results , relè doesn't want to turn it on . I really don't know what's going on now..😔 Thanks

no defect parts... just bad joint soldering.. check path track and resolder T6103 and a rround it

[labello]

no defect parts... just bad joint soldering.. check path track and resolder T6103 and a rround it

Hi i really looking deeper i didn't find anything strange. Thanks

[labello]

Watch under the big inductance L6800, under side, a little higher, there are 4 smd diodes, check them and also on top left zone, the 2 power smd mosfets..

Ok i will check later

[labello]

Watch under the big inductance L6800, under side, a little higher, there are 4 smd diodes, check them and also on top left zone, the 2 power smd mosfets..

Hi i check what you said, unfurnished i didn't find anything strange, diode smd all good also smd mosfet , i found 2 if there's capacitor smd with verità lower resistance (photos circled) and in the primario side I take out both capacitor to measure in right way they have lost 20 uf . So not 150uf but i have measured 130 uf. Thanks

[Davi.p]

what are circled are resistors... 130uF are not a problem..

[labello]

what are circled are resistors... 130uF are not a problem..

I see, it's strange because before i have the standby voltage and the tv turn on regularity... The only doubts that i have is about this capacitor i don't know if i replace it with correctly voltage. The schematic for this board doesn't exist? Thanks

[Davi.p]

I suggest to not replacent that cap, usually Sony boards have good solid caps, you have to know that when you do measurements you must before discharge the big 400v caps

[labello]

I suggest to not replacent that cap, usually Sony boards have good solid caps, you have to know that when you do measurements you must before discharge the big 400v caps

I always discharge the big capacitor before I'm going to touch the board, so without the schematic we can't understand what's going on on this board🙄

[Davi.p]

I'm at work now, i have not much time to examine, let's see at evening..

[labello]

I'm at work now, i have not much time to examine, let's see at evening..

Me too, let's try later 👍 thanks

[labello]

Hello David I really tired for today I just went to home.. Can you tell me what I should check, I'll do it tomorrow morning. Have a good evening thanks again

[Davi.p]

Sorry, i was unable to download the First pictures, now i managed to do it and i saw your measurements, so the test i made you do until now are pointless, you have to check the voltage on the center pin of the two double diodes you removed at the beginning, especially the one that feeds the backlight circuit, after, have you tested the led bars with a led tester?

[labello]

Sorry, i was unable to download the First pictures, now i managed to do it and i saw your measurements, so the test i made you do until now are pointless, you have to check the voltage on the center pin of the two double diodes you removed at the beginning, especially the one that feeds the backlight circuit, after, have you tested the led bars with a led tester?

Hi morning, I'm sorry but I don't removed any doubles diodes, only one leg an testing in diode mode. You mean those little diodes close of the little transformer.. or the heatsink ? Yes the strips led was ok before I installed

[Davi.p]

I'm referring to the post #7 when you dismounted the double-double diodes on heatsink...
each one is a two diode with common cathode..