UE55KS7500U , component ID help please .

[zen]

Hi all

This set has no power

CP810 blown apart . Can anyone help with value ?

PSU P/N = BN4400878A

[nomoresonys]

looks to be the same as cp813, could probably go up a little in voltage.

[zen]

Thanks very much for your reply

Checked through my power supplies & found one with an almost identical part of circuitry .

Cap used was a 470PF

After replacement powered the module in stand alone , PFC at 390V & chopper secondary supplies also seemed good

Fitted back into TV yet still no power & PFC drops to 100V .


Disconnected everything from PSU , but again but PFC stays low .


Suspect the violent demise of CP810 has caused some other issues or at least weakened some associated components .

Oh well , not an easy life .

[nomoresonys]

wonder if it messed up that diode or transistor on the heatsink next to it?

[zen]

Would most likely need to replace FET next to cap , plus drive chip .

Don't have any of them in stock .

[nomoresonys]

yep, prolly got that fet/transistor bad, maybe test it out of circuit.

[nomoresonys]

can't remember things but seems like there must be a way to test the ic related to that fet.

[zen]

Probably easier just to order one a replace it .

Cheap enough , only downside is the wait from China .

[nomoresonys]

I hear that, sometimes I try ebay, i know it's a crapshoot, might get junk, only thing to do is go by buyer feedback I guess.

[zen]

To be honest , had my fingers burnt several times buying components from random Ebay seller .

If i have to buy outside of the UK , or Ebay , i only use trusted sellers that i know source quality parts .

[nomoresonys]

yep, after once bitten, I started checking out their reputation real closely, it's a shame but you gotta be cautious of the new sellers, because there's so many fly by night, hit and run scammers out there.

[zen]

Set going out with a replacement board .

I will repair original in my own time when parts arrive .

Can confirm CP810 is a 470PF