Philips 55POS9002/12 shorted mains

[nomoresonys]

as lotas said. they will be high when PS_PN reach the PSU....
but because you had the issue at PSU.. then need to put the PSU alone on the table... and use stepdown circuit to have from 8.5V 3.3V and fed it to PS_ON... to be sure the PWM working and the vlaue will go high to 12 24V

Interesting Diah, I would like to know how to do this also.

[Diah]

Interesting Diah, I would like to know how to do this also.

there are ready step down circuit less than $5 with regulator R to adjust the out put ... or do it yours self 3.3V regulator Transistor and 2200 uf cap 25V on the out put pin and GND ... same to 3.3V regulator which found on CH314 for example but we need one strong to handle currents

[nomoresonys]

there are ready step down circuit less than $5 with regulator R to adjust the out put ... or do it yours self 3.3V regulator Transistor and 2200 uf cap 25V on the out put pin and GND ... same to 3.3V regulator which found on CH314 for example but we need one strong to handle currents

Thank you sir.

[Henke]

as lotas said. they will be high when PS_PN reach the PSU....
but because you had the issue at PSU.. then need to put the PSU alone on the table... and use stepdown circuit to have from 8.5V 3.3V and fed it to PS_ON... to be sure the PWM working and the vlaue will go high to 12 24V

Ok, now I connected only psu board and 3.3v from my bench supply to PS_ON. 8,6V rises to 12.55v as expected 👍 but the 24V_A pin (MB connector) also have 12.55V. I don't now what's happening there? Seems only to be separated by a few inductors from the 12V potential.

But can we now confirm that the main board is the issue?

[Henke]

Schematic

Do you have the schematic for the main board as well?

Or do I need to buy a new one as I don’t get the PS_ON signal to psu?

[William1967]

It's flashing very rapidly. It's impossible to count. But first 3 ast and then pause and then around 40 very rapidly. Then it starts over.

i tried to film in slow motion and count. its around 40, but still hard to count.

When the red led on the front is flashing very fast the TV is in t-con error, with a small piece of software that error can be deleted and the tv will start.

[Henke]

When the red led on the front is flashing very fast the TV is in t-con error, with a small piece of software that error can be deleted and the tv will start.

Ok, can you please explain little bit more in detail 👍

[William1967]

What is there to explain, a Philips oled tv the tv goes into t-con protection if an error is "seen" that is panel related. This can already be due to dirty cables or cable connections, you can clean these with compressed air and IPA.
A thin line in the dispaly also could be a culprit.
To remove the t-con error you need special software, this is a small 20kB file that overrules the error.

[nomoresonys]

What is there to explain, a Philips oled tv the tv goes into t-con protection if an error is "seen" that is panel related. This can already be due to dirty cables or cable connections, you can clean these with compressed air and IPA.
A thin line in the dispaly also could be a culprit.
To remove the t-con error you need special software, this is a small 20kB file that overrules the error.

Now THIS is some interesting stuff.

[Henke]

What is there to explain, a Philips oled tv the tv goes into t-con protection if an error is "seen" that is panel related. This can already be due to dirty cables or cable connections, you can clean these with compressed air and IPA.
A thin line in the dispaly also could be a culprit.
To remove the t-con error you need special software, this is a small 20kB file that overrules the error.

About the software I meant

[Henke]

What is there to explain, a Philips oled tv the tv goes into t-con protection if an error is "seen" that is panel related. This can already be due to dirty cables or cable connections, you can clean these with compressed air and IPA.
A thin line in the dispaly also could be a culprit.
To remove the t-con error you need special software, this is a small 20kB file that overrules the error.

Here is the picture over the mb. No voltage on the
caps that goes to usb etc.

[William1967]

I always use a USB with control led to see if there is activity.

[Henke]

I always use a USB with control led to see if there is activity.

Used a usb tester now. Activity when turning on the mains for a few seconds, after that nothing.

[Diah]

search the forum. i posted binary file to remove the protection sos for Philips OLED

[Henke]

search the forum. i posted binary file to remove the protection sos for Philips OLED

it started up now. I downloaded a software with a usb stick. Thanks for all the help!

[Diah]

it started up now. I downloaded a software with a usb stick. Thanks for all the help!

you welcome

[nomoresonys]

So what did you need to do, just put the an update on the usb stick or did you have to get the binary file to remove protection or what?

[Henke]

So what did you need to do, just put the an update on the usb stick or did you have to get the binary file to remove protection or what?

I put a small NVM.eed file on the stick and loaded it in usb port 1. As William wrote, the tv probably got into a T-con protection, and that file overruled it. so the fault is probably still there but have to try it little bit more to se if i notice something with the picture.

But is the TV still safe to use with that kind of solutions??

[Diah]

yes tits safe , if there any at future issue with Cells.. there are Fuses on T-CON driver boards will monitor the EVDD currents.

[nomoresonys]

Thanks for clarification.