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Old 07-01-2022, 03:39 AM   #1
zen
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Join Date: Apr 2011
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Default UE55KS7500U , component ID help please .

Hi all

This set has no power

CP810 blown apart . Can anyone help with value ?

PSU P/N = BN4400878A
Attached Images
File Type: jpg CP810.jpg (860.1 KB, 19 views)
File Type: jpg PSU module.jpg (971.9 KB, 16 views)
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Old 07-01-2022, 04:06 AM   #2
nomoresonys
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Default Re: UE55KS7500U , component ID help please .

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

Last edited by nomoresonys; 07-01-2022 at 04:56 AM..
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Old 07-01-2022, 06:08 AM   #3
zen
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Default Re: UE55KS7500U , component ID help please .

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 .
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Old 07-01-2022, 06:28 AM   #4
nomoresonys
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Default Re: UE55KS7500U , component ID help please .

wonder if it messed up that diode or transistor on the heatsink next to it?
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Old 07-01-2022, 07:59 AM   #5
zen
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Default Re: UE55KS7500U , component ID help please .

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

Don't have any of them in stock .
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Old 07-01-2022, 08:26 AM   #6
nomoresonys
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Default Re: UE55KS7500U , component ID help please .

yep, prolly got that fet/transistor bad, maybe test it out of circuit.
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Old 07-02-2022, 05:12 AM   #7
nomoresonys
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Default Re: UE55KS7500U , component ID help please .

can't remember things but seems like there must be a way to test the ic related to that fet.
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Old 07-03-2022, 03:58 AM   #8
zen
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Default Re: UE55KS7500U , component ID help please .

Probably easier just to order one a replace it .

Cheap enough , only downside is the wait from China .
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Old 07-03-2022, 04:08 AM   #9
nomoresonys
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Default Re: UE55KS7500U , component ID help please .

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.
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Old 07-03-2022, 05:03 AM   #10
zen
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Default Re: UE55KS7500U , component ID help please .

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 .
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Old 07-03-2022, 06:15 AM   #11
nomoresonys
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Default Re: UE55KS7500U , component ID help please .

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.
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Old 07-05-2022, 09:01 AM   #12
zen
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Default Re: UE55KS7500U , component ID help please .

Set going out with a replacement board .

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

Can confirm CP810 is a 470PF
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