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Old 04-25-2015, 09:36 PM   #1
jls1znv9999
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Default Samsung LN52B750 Capacitors 52" LCD TV help

I pulled the power supply board and clear as day I have 2 bad caps.
I want to replace them with a higher voltage as i know i can go a little over without damaging the tv itself. (Correct me if I am wrong)
Existing damaged capacitors:
1200uF 10 volt with NXE label nothing else noted on them.

1. What are some of the best quality capacitors to replace the blown ones with?

I appreciate the help. I think this is the correct forum please excuse me if it isn't.
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Old 04-25-2015, 09:46 PM   #2
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

Panasonic FC, FM, and FR caps are recommended a lot here. There are quite a few other good brands. You can go up in voltage without any problem - I'd upgrade to at least 25V. The physical size of the larger voltage caps should be considered to ensure the replacement caps will fit.

Last edited by capkid; 04-25-2015 at 09:54 PM..
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Old 04-25-2015, 10:05 PM   #3
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

They have to be low ESR type that is the important for switching power supply, going higher Voltage with general purpose type caps is not going to make it better.
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Basic LCD TV and Monitor troubleshooting guides.
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Voltage Regulator (LDO) testing:
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Old 04-25-2015, 10:06 PM   #4
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

They have to be low ESR type that is the important for switching power supply, going higher Voltage with general purpose type caps is not going to make it better.
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Old 04-25-2015, 10:09 PM   #5
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

Quote:
Originally Posted by budm View Post
They have to be low ESR type that is the important for switching power supply, going higher Voltage with general purpose type caps is not going to make it better.
True.
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Old 04-25-2015, 10:52 PM   #6
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

Quote:
Originally Posted by budm View Post
They have to be low ESR type that is the important for switching power supply, going higher Voltage with general purpose type caps is not going to make it better.
Yeah that's what i am looking at. I have the option of 16volt to 25 volt. I am comparing the ESR values. I want to make sure i get the most out of the replacements
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Old 04-25-2015, 10:59 PM   #7
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

As long as they fit.
Here are the spec sheet, once you find what you need then just type in the P/N into Digikey search box.
http://www.badcaps.net/forum/showpos...2&postcount=65
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Old 04-27-2015, 12:46 AM   #8
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

Quote:
Originally Posted by budm View Post
As long as they fit.
Here are the spec sheet, once you find what you need then just type in the P/N into Digikey search box.
http://www.badcaps.net/forum/showpos...2&postcount=65
I'm not 100% on the ESR value but after checking through several caps and different manufacturers. I decided to go with Panasonic. Here are the values I got from their data sheet and site. They claim low ESR (but who doesn't)

Budm and others could you give it a quick once over and let me know if it's decent ESR. I know it's definitely better than Samsung factory.
Thanks for all the help.
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Old 04-27-2015, 08:32 AM   #9
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

As for the EEU-FR1E122L Capacitor listed above. I checked the data sheet for it and for the ESR's it shows this on the table:
E.S.R.-2(freq.) -
E.S.R.-2(max. value) -
Also shows these:
Tangent of loss angle(max.) 0.14 (says to add 0.02 per 1000uF over 1k uF) So 0.16 ?
Leakage current(max.) 300 micro A
Rated ripple current-1(freq.) 100000 Hz
Rated ripple current-1(unit) mA r.m.s.(root mean square)
I am going to try to find a formula to calculate or estimate ERS unless anyone else knows.
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Old 04-27-2015, 12:40 PM   #10
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

http://www.edn.com/design/components...r-temperatures

http://www.rubycon.co.jp/en/products...rformances.pdf

http://www.cde.com/resources/catalogs/AEappGUIDE.pdf

BTW, the spec is shown IMPEDANCE which is not the same as ESR.
I use FM/FC/FR for all my TV, MONITOR/ AUDIO, misc for all my repair works.
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Old 04-29-2015, 09:13 AM   #11
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Default Re: Samsung LN52B750 Capacitors 52" LCD TV help

Thanks budm, i really appreciate it. I know that my wife will also. It's been a pain trying to watch the NHL playoff's on a smaller tv. I should be getting new caps in by this friday. I will keep you updated. I am going to replace the other 2 x 25 v 1200uF caps on the board while i am at it.
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