Hi all
This set has no power
CP810 blown apart . Can anyone help with value ?
PSU P/N = BN4400878A
This set has no power
CP810 blown apart . Can anyone help with value ?
PSU P/N = BN4400878A
Attached Files
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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, 04:56 AM. -
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 .Comment
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Re: UE55KS7500U , component ID help please .
wonder if it messed up that diode or transistor on the heatsink next to it?Comment
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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 .Comment
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Re: UE55KS7500U , component ID help please .
yep, prolly got that fet/transistor bad, maybe test it out of circuit.Comment
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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.Comment
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Re: UE55KS7500U , component ID help please .
Probably easier just to order one a replace it .
Cheap enough , only downside is the wait from China .Comment
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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.Comment
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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 .Comment
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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.Comment
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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 470PFComment
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Hi,
Back after a long hiatus with some old power supplies that need repairing. I've recently picked up a couple of 386SX systems, two 486DX systems, a SiliconGraphics Indy and an iMac G3 that either have verified leaking capacitors in their power supplies, or are likely to in the near future. For the sake of simplicity, instead of tackling all at once, I'm starting with the 386's and one of the 486's.
The 386's power supplies are Seasonic SS4040A's, with caps that are visibly leaking, and 9 replacement caps per unit are required. Most appear to be from the Rubycon... -
All,
I recently purchased for a colleague and myself two used HP Docking Stations. They are for home use and are exact model as the ones we use at work for our laptops. We are both Software Developers.
Anyways these docks are HP Model 5TW10UT#ABA.
Unfortunately they did not come with there Power supplies (PSU) and I got them reasonable from eBay.
I purchased 2 new from Amazon After Market Power Supplies(PSU). Same Voltage and Same Amperage and in fact it mentions on the Amazon page they are supported for these docks as well.
h... -
Hi everyone,
I'm new to this, so I apologize for not providing enough details. Is there anything else I need to mention? I'm trying to learn more about electronic/board repairs and hopefully fix my own.
The only visible issue on my board is one capacitor, CP813, which appears to be labeled R 221k 2kV (possibly obsolete to B 221k 2kV now). My monitor hadn't shown any prior issues, although it is a few years old. Just before the capacitor popped, there was a high-pitched squeal for 2–3 seconds.
I don't see any other visible damage anywhere else on the board.... -
Here is the eBay website link where I bought them from
https://www.ebay.com/itm/276135936202
I have been waiting for these switching power supplies to come well they came in today so I took one apart and found that it Capcon and EIite and another brand that is on my list of capacitors to replace on site it has several 0.47uf @ 50 volts ESR value twice the reading of a new one 10 UF @ 50 volts almost twice the ESR value of a new one 47 UF @ 59 volts with double the ESR value 100 UF almost the same as a new one it got replaced for good measure Iit was a brand if I see them... -
Hello everyone,
I was wondering if anyone in the forum can tell me how they use the variac transformer to check a switch mode power supply that they had just repaired.
I wanted to know how they adjust the votlage, do they start from zero and turn it up slowly or rather switch on that about 60V ac ( My country we use 220V ac) and hope for the best.
Also what sounds the PSU should make, what sounds wrong etc. Also if i have a scope what can i check for.
The reason why i am asking is i have a Sony LED TV PSU whose PFC circuit shorted out and upon closer inspection a...
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