LG42pa4500, YSUS problem

Measure made without 2xKF7N60, diode
1-3 OL
4- 4.5k
5-7 OL

I dont have more KF7N60 atm. Could I use P4NK60Z? It have better ns, only worst diffrent is that they are 4A, not 7A. It will be good just for test?

Ok done, It NOT blow now.
But I noticed somthing weird. This line (Vs) not get 205V, when FFC cable is disconnected.

matic написав:Check, if the "Vs" voltage appear for a short time, when you turn on the TV.

Yep but It was weird. Only in few sec peak. Peak was only 2V

Yep it was shining
I was so supprised
Nothing exploded
It was shining long time, not just moment.

I made some more Measure. I check that small board (Responsible for FFC cable), everything looks fine.
What's more when bulb lights up, this is how looks Voltage.

This mean the bulb was consuming all power? right?

Arni написав:I dont have more KF7N60 atm. Could I use P4NK60Z? It have better ns, only worst diffrent is that they are 4A, not 7A. It will be good just for test?

Przepraszam, że tak długo nie wracałem do tematu, ale czekałem na dostawę z aliexpress.
Na chwile obecną mam ich dużo z aliexpress. Zmieniłem te P4NK60Z na oryginalny KF7N60. Nic nie wybuchło, gdy włączyłem telewizor z odłączonym kablem FFC. Na linii było 205 V (Vs).
Postanowiłem normalnie włączyć telewizor. Wszystko uruchomiło się normalnie. (Myślę, że problem był w 4mosfetach: 2xKF7N60,2XRJP30H2A). Następnym razem, gdy będę wymieniać, wymienię je wszystkie, nawet jeśli tylko jeden lub dwa będą wyglądać na uszkodzone.


Wielkie dzięki matic

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Sorry I didn't write for so long, but I was waiting for delivery from aliexpress.
Now I have a lot of them from aliexpress. I changed this P4NK60Z for orginal KF7N60. Nothing blow up when I turn on the TV with disconnected FFC cable. There was 205V on line (Vs).
I decided to turn on the tv normally. Everything started normally. (I think problem was in 4mosfets, 2xKF7N60,2XRJP30H2A). Next time I will repleace all of them even only one or two will be damaged.


Thanks much matic