Question about Astar LTV-2701 27 in. HD-Ready LCD Television

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Replacing bad caps

What is the difference between a 450wv cap and a 450v cap?

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Http://www.flickr.com/photos/byziol/3199699625/sizes/l/
List of caps
Where to get them 450WV replacement

Posted on Jan 16, 2009

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Mostly a matter of preference; the working voltage of a cap is the maximum it should be subjected to continuously; some capacitors are rated with an additional 'Surge' rating, the voltage they can withstand now and then without self-destructing. Those intended for use as decoupling caps or to smooth DC voltages, will have clearly marked polarities which are important and installing them backward can produce a surprisingly loud 'pop' and scatter aluminum foil and paper scraps for a few feet. 

If a cap has only a 'V' (such as 450V) after the rating, you can safely assume it is DC or direct current voltage. Most caps are marked with either V/DC or V/AC and while one marked AC can be used with static voltages (DC), one marked with VDC is not normally suitable for use with alternating current uses. Caps marked with AC ratings are used for motor starting and other AC-only applications and actually may be subjected to peak voltages well beyond the stated rating.  Some AC caps will bear a symbol indicating which lead is connected to the outer foil since this can be important in some applications where the outer foil can serve as a shield.

Posted on Dec 25, 2008

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Not much. V means "Voltage" and "WV" means "Working Voltage".

V means peak voltage that the capacitor can handle. WV means the normal voltage it can handle, but it can handle brief spikes higher.

As long as they're the same type (tantalum, electrolytic, etc) and oriented the right way, and at the same or higher working voltage, you should be fine.


Posted on Dec 25, 2008

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Will a 16uf 450v generator capacitor work in place of a 12uf 450v generator capacitor


Yes it will. The key is to not go lower in capacitance or in rated voltage. As you go up in cap size the cost will also go up so you want to stay pretty close to rated value unless dinero is no object.

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This is a common problem with Polaroid sets. I would check the power supply/inverter board for any capacitors with bulging tops. The typical ones that cause this problem are 10uf 450V caps.

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The 'check engine' light comes on when almost anything goes wrong, from a loose gas cap to computer systems; low fluid levels to a bad catalytic converter. A common problem is the gas cap not screwed on correctly. This has an easy remedy. Screw the cap off and then carefully seat it and screw it back on until you hear it click. Then drive the car for at least 100 miles. If the light goes out that was the problem.
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I have a problem i just replace 2 capacitors 10uf 450v and imagen come but after 20 sec. the others one cap blue 10j 3kv just burn, what i have to do?


Are you saying there is a blue 3 kv rated cap in the unit? Most LCD sets (that is what is listed here) do not have any caps rated that high voltage wise.

You would need to id that cap---3 KV means rated at 3,000 volts and usually will be markings like 104 j etc

If different model/brand than indicated here let me know.

that cap will have a location number printed on top of the board next to or under it like C706 etc.

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My polaroid when turned on after a few secs the screen goes black but the volumes still works


Bad caps in the power supply. 10 uf 450v be careful these caps really hold a charge.

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1 Answer

I have sound on my samsung sp-p4251 EDtv but no video


Most likely the 22Uf 450v Capacitor has went out. It's on the Main Power Board. It's a decent sized cap, but not a huge one. Take to a repair shop if u want, or take the back off, plug in your hair-dryer & heat up that cap. Should have picture within 10-20 seconds of it getting hot. If it solves your problem, just find / buy that cap & solder it on. (Or have someone who can) Total parts approx-$20 (Including Soldering gun/iron)

The capacitor is about $3.

Jul 30, 2011 | Samsung SP-P4251 42 in. Plasma EDTV

1 Answer

I have a acoustic solutions CTVL32W3HD television,It has no picture but sound is working fine It has a red flashing led on the power board, I changed the 2 10uf 450v caps that were bloated , no difference


The two caps you changed are the typical solution for this problem. Maybe there's a problem with the inverter board.
Check to see if there are any smd fuses near those two caps that you replaced. Then resolder the transformers on the inverter board. You'll probably find some more smd fuses on the inverter board. Check them and tell us the result.

Apr 08, 2011 | Televison & Video

2 Answers

I have sound but no pic on my polaroid hd tv model number tda03211c there is also a red light blinking in the back of unit when it is on


Hello; I am John at J D Electronics in Poland Maine. I have had a few Polaroid model TDA03211C in my shop that would show Polaroid on screen and then loose the backlights. but not always, but would still have sound and remote control abilities. Many of these Polaroids and Memorex 32" sets have the same design. There is the main board in the bottom of the large metal box with the power supply/ ivnverter board in the top. On a few of these I found opened Caps to the right of the 2 large ivnverter transformers on the left. These were labeled EC17 and EC18. They are 10ufd @ 450V and 105 degree C. Replacing these 2 caps has now fixed 3 of these sets. John

Apr 08, 2010 | Polaroid TDA-03211C 32 in. LCD HDTV

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