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How do you tell a capacitors polarity? - Computers & Internet

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On one side of the capacitor is a +++ that is how you tell

Posted on Mar 27, 2011

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Hello,

If capacitors are electrolytic types, then they have polarity + and -, and always are a mark on the pc board and it could be marked with either the "+" symbol or "-" capacitor has a mark itself that denotes polarity also, the most common mark i have seen is "-" running from top all the way down at a side of cap, you just have to buy them same voltage and capacitance rating and install them verifying TWICE the correct polarity and you are done, Mouser electronics has a wide stock of electrolytics, but remember polarity otherwise you will get a very big pop.

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If this is an lcd tv check for capacitors on the power board that have domed tops. Replace these capacitors with the same value. microfarad mf and voltage v. make sure to notice the polarity and no not us non polarized capacitor. only use electrolytic capacitor .

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It will be best to replace all of them at one time. Make sure about the polarity of electrolytic capacitors, when replace them. They have both +ve and _ve terminals, and should be noted the postion of fitting when your desolder out. If the polarity changes, they might explode when you switch on the set.

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Replacing a 220Mfd capacitor with 440Mfd wond poise this problem. Just check, whether the the polarity of the repalced capacitor have been reversed. Electrolytic capacitors have both +Ve and -Ve terminals. It reversed, the capacitor will insert a short circuit, when you switch ON the set. On some occations, it will heat up and will burst out. Check this first. The polarity of electrolytic capacitors will be marked on the printed circuit board too. Check whether the markings at the printed circuit board matches with the polarity of electrolytic capacitor you have recently replaced.

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Hello
It is eay to replace the power capacitors. Just resolder them out from the board and solder a new one in place. Make sure the polarity of the capacitor. Electrolytic capacitors will have both +ve and -- Ve polarity. It will be marked both on the capacitor and printed circuit board. Normally --Ve markings can be seen on most capacitors. Coinside this marking to the marking at the printed circuit board. If the polarity reverses, the capacitor will explode as you switch ON the set.
See the negative (--Ve) marking.

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Hello
It is a two terminal component, and can be replaced easly. But when you unsolder it out of the board, make sure of the polarity, ie, it is an electrolytic capacitor, and have both positive and negative polarity. This will be maked on its body, normally negative will be marked, and should be noted. When replacing it, the polarity of the new one should coincide with, otherwise it will burst out, and will be dangerous. This is the only thing to be noted when replacing an electrolytic capacitor of any type. OK.

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generally electrolytic capacitor is polarized..and if im n0t wrong 216-259 stand for tollerance microfarad- uf and 110-125 stand for tollerance volts-v pls check for the symbols on that capacitor

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Hi,
Unplug your tv power and dissemble your tv. Find the defective capacitors and mark the polarity. Check also the code of broken capacitors . The replacement should have same model and specs. Dismantling the broken capacitors and re install the new ones. Observe the polarities then do soldering. Try your TV.

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1 Answer

C6 Polarity?


Hi CALSunbelt

There is no polarity to be conscious of when you are using a BiPolar cap. They can be used in either direction.

regards
Graeme

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