Need advice on good replacement caps.

[mef601]

Hello,
I have a Philips/LG LCD TV with a bad power supply. It started to give off a burning smell and the video eventually failed after a couple of days. I know the caps on the power supply board are bad and want to replace them with a better brand if someone could help point me in the right direction. any help would be greatly appreciated.
these caps have the same values but are different sizes (same height, different diameters)

TV model: 47pfl3603d/27
board part# plhl-t722a or 2722171

[mef601]

Re: Need advice on good replacement caps.

sorry, I can't upload images? files are <500K. I'm using the manage attachments "utility" and it seems stuck on "uploading files, please wait".

the caps are SAMWHA 2200uF 25V. one cap has "RD" next to the manufactures logo and the other has "WB". both are 105 degrees Celsius.

[mockingbird]

Re: Need advice on good replacement caps.

The Samwha datasheets are at their site. They're not so easy to get to because they have them set up in an animated flash catalogue. If you can't find "WB" series, it's because it was replaced by the "MK" series.

I have the old WB datasheet if you're interested in PDF.

[retiredcaps]

Re: Need advice on good replacement caps.

sorry, I can't upload images? files are <500K.

Follow the instructions in my sig file exactly.

[mef601]

Re: Need advice on good replacement caps.

thanks for quick replies.
retiredcaps, i do not see a signature for you, it just says "--- end sig file --- "

[mariushm]

Re: Need advice on good replacement caps.

Click on Go Advanced, then there's a button there in the toolbar called "Manage Attachments"... looks like a paperclip.

The pictures have to be smaller than 2000 pixels , width or height.. and size should be below 2 MB if I remember correctly

PS. I've grabbed the Samwha datasheets a while ago and posted them here: ftp://helpedia.com/pub/temp/datashee...et%203/Samwha/

What you're looking for is probably in the 12 MB catalogue or Miniature.pdf or Large.pdf

[PCBONEZ]

Re: Need advice on good replacement caps.

Here

[mef601]

Re: Need advice on good replacement caps.

so how long does it normally take to upload with a good ISP connection? my file is .jpg 448KB 1600x1200. it just says "uploading files-please wait". i usually wait 5min then kill it.

[mef601]

Re: Need advice on good replacement caps.

Thanks PCBONEZ, that's them. Is there a better brand I can replace them with? This is a common issue and I would hate to replace junk with more junk. thanks again...

[PCBONEZ]

Re: Need advice on good replacement caps.

You didn't give dimensions so I can't make specific suggestions.

Any Japanese brand with:
- the same or less ESR [aka Impedance @100kHz]
- the same or more Ripple.
.
The common ones are: Rubycon, Nichicon, Chemicon, Sanyo, Suncon, Panasonic

~
The RD are General Purpose [GP] caps so you won't see ESR/Impedance listed.
[Also rated at 120Hz instead of 100kHz and the correction factor isn't given.]
Use some entry level low ESR caps for those such as Chemicon LXZ, Pannasonic FC, Nichicon PW.
[There are dozens actually.]

WB [meaning MK] are equivalent to KZE, ZL, HD - based on their Ripple.
KZE, ZL, HD all have MUCH better ESR so that's not even an issue this time.
[Double check the specific cap. Differing can sizes can screw the cross reference up at times.]


This will help.
https://www.badcaps.net/forum/showpo...1&postcount=17
.

[PCBONEZ]

Re: Need advice on good replacement caps.

Also:
The Ripple and ESR are related to the can size [not uF and volts].
.
So if the physical size of the cap does not match what is shown for uF and volts in the data sheet then [in the data sheet] find the closest cap with same physical size as the one in hand and use that Ripple and ESR as what you are looking to match or better.
.

[Scenic]

Re: Need advice on good replacement caps.

PS. I've grabbed the Samwha datasheets a while ago and posted them here: ftp://helpedia.com/pub/temp/datashee...et%203/Samwha/

Sorry for going a bit off-topic, but could it be that the "electrolytic list.pdf" is somehow damaged or in a non-standard format? All I get when I try to open that is "Couldn't render the page" in Sumatra PDF.
All other PDFs seem to work just fine.. weird

[mef601]

Re: Need advice on good replacement caps.

Hi PCBONEZ, sorry for the long delay with this reply. I'm having trouble finding replacement caps with the package size and ripple. I've checked mouser and digikey but can't seem to locate. Here are my part specs... they are all Samwha brand..

RD- wide temp range (-55~105C), General Purpose.
2200uF / 25V / 12.5x25mm / 1235 ripple

WB- ultra low impedance
2200uF / 25V / 16x25mm / 3460 ripple

WB- ultra low impedance
2200uF / 50V / 16x25mm / 3460 ripple

WB- ultra low impedance
1000uF / 35V / 12.5x25mm / 2770 ripple

[mockingbird]

Re: Need advice on good replacement caps.

1) UCC SMG 25V 2200uF 12.5x25 1540
2) Panasonic FR 35V 2200uF 16x25 3820
3) Please double check this one... If this really is a 50V 2200uF cap, turn on the TV and check the voltage of the cap. Most likely it is not actually drawing 50V so you might be able to use the 35V cap above.
4) Panasonic FM 35V 1000uF 12.5x25 3190

[mariushm]

Re: Need advice on good replacement caps.

WB- ultra low impedance 2200uF / 50V / 16x25mm / 3460 ripple

this would be hard to match. 90% chance you don't need 50v rated, they just used them for the higher ripple and lower esr.

These will work :

2200/35 pan fr : http://search.digikey.com/us/en/prod...451-ND/2433585

If you can go 18mm in diameter or up to 32 mm in height, there's more options:

2200/35 http://search.digikey.com/us/en/prod...1596-ND/589337
2200/35 http://search.digikey.com/us/en/prod...1597-ND/589338


WB- ultra low impedance 1000uF / 35V / 12.5x25mm / 2770 ripple

http://search.digikey.com/us/en/prod...2405-ND/613766
http://search.digikey.com/us/en/prod...1697-ND/756213
http://search.digikey.com/us/en/prod...445-ND/2433579 (a bit lower ripple but close enough)

2200/25:


http://search.digikey.com/us/en/prod...6TB-ND/2504161
http://search.digikey.com/us/en/prod...429-ND/2433563

12.5mm

http://search.digikey.com/us/en/prod...1066-ND/588807

[mef601]

Re: Need advice on good replacement caps.

sorry, the 50V is incorrect. it's actually 1000uF. that's the one i'm having a hard time finding. it's in a good spot on the board though and dimensions are not that important but i would like to keep the length under 35mm.

WB- ultra low impedance
1000uF / 50V / 16x25mm / 3460 ripple / 0.018 imped.

[mockingbird]

Re: Need advice on good replacement caps.

sorry, the 50V is incorrect. it's actually 1000uF. that's the one i'm having a hard time finding. it's in a good spot on the board though and dimensions are not that important but i would like to keep the length under 35mm.

WB- ultra low impedance
1000uF / 50V / 16x25mm / 3460 ripple / 0.018 imped.

Sorry. The only series I know of that can match that spec is Rubycon ZLJ... It says "no longer available" at Newark... The closest thing that has a slightly lower ripple is Panasonic FM Ripple is 3320 vs 3460.

edit: WB was relpaced with MK... Most likely the specs on the MK datasheet are more accurate than those on the WB sheet... MK datasheet lists the 16x25mm 50V 1000uF cap ripple at 3114... So you're perfectly safe with the Panasonic FM as a replacement, in my opinion.

[mariushm]

Re: Need advice on good replacement caps.

^ Correct, FM would be fine.

If you don't find FM, FR is just as good, it's an updated FM series. Same 3320 mA ripple, 0.016 ohm

[mockingbird]

Re: Need advice on good replacement caps.

No, FR is miniaturized FM...

[mariushm]

Re: Need advice on good replacement caps.

No. In fact it's taller than FM for some capacity/voltage combinations.

:



datasheet is here:

same esr as fm
longer lifetime 5k-10k @105c depending on can size compared to 2k-7k on fm