capacitor question (for my tv)

[waisodim]

I have a Samsung LCDHDTV and so last night i was watching a movie when all of a sudden it turns off. I try turning it on and it wont. The light just blinks. I did some research and found out this happens to a lot of samsung tvs and the problem is blown capacitors. I checked and there it was, a blown capacitor. The capacitor was a 2200 uf 105 degrees and 10v. So today, i went to radioshack to buy a capacitor and and soldering iron. I looked but they only had capacitors that were 2200 uf 85 degrees. It was also quite bigger than the one that stopped working. I bought the soldering iron but not the capacitor because i read somewhere that the microfereds and the degrees had to be exact, but the volts didnt. Is it true or can i use ones with lower degrees than the original? Also does it have to be the same size or can it be bigger? Since the ones in radioshack are bigger and lower degrees, i thought i should just buy one online so i can get one the same size and same degrees.

 

[ur6beersaway]

Get the Exact one as far as ALL the ratings, as far as physical size doesn't matter as long as it fits.

 

[USAFRet]

I would attempt to buy the exact replacement one online, but...

If you're buying a soldering iron from the Shack, how are your soldering skills?

 

[waisodim]

I would attempt to buy the exact replacement one online, but...

If you're buying a soldering iron from the Shack, how are your soldering skills?

Had never done it before. I just unsoldered the capacitor to measure it. It came out to be 15mm length x 10mm width.

 

[USAFRet]

I would attempt to buy the exact replacement one online, but...

If you're buying a soldering iron from the Shack, how are your soldering skills?

Had never done it before. I just unsoldered the capacitor to measure it. It came out to be 15mm length x 30mm width.

Tread carefully. Don't blow yourself (or the TV) up.

 

[barto]

I have a friend who had this issue. You should actually get a higher voltage and wattage cap. What actually happens is the caps get more volts than what they are rated, which is why they pop. As for the temps, again, if you can get a higher value it would be better as temperature can effect capacitance.

Edit: To highlight, you should practice soldering before actually doing it. Make sure you don't make connections between other components. Use wick or a solder pump.

 

[waisodim]

I would attempt to buy the exact replacement one online, but...

If you're buying a soldering iron from the Shack, how are your soldering skills?

Had never done it before. I just unsoldered the capacitor to measure it. It came out to be 15mm length x 30mm width.

Tread carefully. Don't blow yourself (or the TV) up.

thanks, its not that hard.

 

[ukee1593]

Blown electrolytic capacitors have to be the number 1 cause for broken electronics today ...

First of all, some information about choosing a replacement capacitors:

So there are 3 major features when choosing an electrolytic capacitor: Capacitance, Voltage, and Temperature:

Capacitance measures how much charge the capacitor can store;

Voltage shows the MAXIMUM voltage the capacitor can operate at ... a 50V capacitor can operate at 10V, but a 10V capacitor cannot operate at 50V.

Temperature is a measure of how many hours the capacitor can operate at that maximum temperature. We should always overestimate this.

The electrolytic capacitors used in most electronics are usually only used to filter out a power supply, so the specifications on the capacitors aren't THAT important as they are not doing anything which requires perfect accuracy (such as signal processing).

When replacing the capacitor choose one that is either the same capacitance, or slightly higher. The same capacitance will be better but its not terribly important for electrolytics. Just don't go crazy!

Its always good to get a high temperature capacitor, but you will be able to get your TV working with an 85C capacitor, just you'll have to replace it more often. More importantly than temperature, try and get one from a reputable brand such as Panasonic or Nippon Chemicon.

Finally Voltage; You'll be fine as long as the voltage is higher than the capacitor that you are replacing.

In the future I would recommend that you choose televisions from Panasonic or Sony (Preferably Panasonic). These, while they are a bit more expensive generally have much better components in them. (Panasonic are one of the biggest, and best electronic parts manufacturers, So they use their own parts in their own products).

for more information, check out the eevblog forums or capacitor repairs

 

[garhart]

I have a Samsung LCDHDTV and so last night i was watching a movie when all of a sudden it turns off. I try turning it on and it wont. The light just blinks. I did some research and found out this happens to a lot of samsung tvs and the problem is blown capacitors. I checked and there it was, a blown capacitor. The capacitor was a 2200 uf 105 degrees and 10v. So today, i went to radioshack to buy a capacitor and and soldering iron. I looked but they only had capacitors that were 2200 uf 85 degrees. It was also quite bigger than the one that stopped working. I bought the soldering iron but not the capacitor because i read somewhere that the microfereds and the degrees had to be exact, but the volts didnt. Is it true or can i use ones with lower degrees than the original? Also does it have to be the same size or can it be bigger? Since the ones in radioshack are bigger and lower degrees, i thought i should just buy one online so i can get one the same size and same degrees.

 

[garhart]

You should use the same uf and voltage as what is in the power section of the TV. What I use only for power board repair on flat screen TV's are Rubycon capacitors. These last quite a long time and have a higher tolerance rate for heat. I use them in all my LCD and LED monitor repairs and they just seem to last. I have flat screen monitors out in use yet that I repaired 5 years ago using Rubycon capacitors and they have never came through my door yet for repair. I order all my capacitors off of eBay