Trouble with proview lcd tv 20"

[topj]

Hey, im having trouble with my tv. I turn it on shows the blues screen and that's it. It doesn't show any picture or sound.just blue, not even the "no signal" sign. so i did some research and found a guy repairing different tv with the exact same problem on youtube. Click here to see that vid

so i opened up my tv and this is my first time really learning about caps. i feel some popped up and some not popped up.heres a image . so i guess im suppose to change the green ones , should i change em all? and how would i know wich ones to buy to replace?

thanks

[PlainBill]

Re: Trouble with proview lcd tv 20"

Hey, im having trouble with my tv. I turn it on shows the blues screen and that's it. It doesn't show any picture or sound.just blue, not even the "no signal" sign. so i did some research and found a guy repairing different tv with the exact same problem on youtube. Click here to see that vid

so i opened up my tv and this is my first time really learning about caps. i feel some popped up and some not popped up.heres a image . so i guess im suppose to change the green ones , should i change em all? and how would i know wich ones to buy to replace?

thanks

Yowtch!!! That's a lot of popped caps!!! I count six that have popped and six that haven't. I'd be tempted to replace them all. I feel the confidence is worth the extra effort. Figure each cap will cost in the $.50 to $1.00 range.

The process is tedious, but not particularly difficult IF you have decent soldering skills. Here's the process.

There should be a circuit designator by each cap (C702, C704, etc). Make a chart showing the circuit designator, manufacturer, the series, the value, the voltage, the diameter and the length of each cap. It may be necessary to pull the caps to get this information.

Post the chart. Someone (probably me, or someone smarter ) will cross reference them to part numbers from a reputable manufacturer or stock numbers from either DigiKey or Mouser. (If you are not in the USA, let us know). Personally, I prefer Panasonic FM or FC series from DigiKey because of the known reliability of Panasonic and the low cost shipping option of Digikey. As a rough guess, it will cost $10 - $15 to replace all of the caps you have circled.

When the replacements come in, carefully match each cap to it's location, making sure it is oriented properly before soldering it in.

PlainBill

[Krankshaft]

Re: Trouble with proview lcd tv 20"

The scoring pattern on the green caps vents look like Teapos. The 3 dash marks around the Y score pattern gives them away.

I'm betting the purple caps are Hermeis don't know of any other cap company that uses that pimp shade of purple .

[topj]

Re: Trouble with proview lcd tv 20"

lol @ pimp shade purple,

Thanks guys, ill look and see what type they are and all that today and post up the info.

[topj]

Re: Trouble with proview lcd tv 20"

1 more question.. does radio shack or circuit city sell Panasonic caps?

[PlainBill]

Re: Trouble with proview lcd tv 20"

1 more question.. does radio shack or circuit city sell Panasonic caps?

No. Circuit City went out of business over a year ago, and the company that bought the name doesn't have a brick and mortar storefront. Radio Shack has changed it's name to 'The Shack' to disassociate itself from it's past. While they still sell components that could generously be called capacitors, they are not of the proper value, voltage, or ESR rating to serve your purposes.

Here's the deal. If you place an order with Digikey by 6:00PM CDT on Monday and specify shipping by USPS first class mail the caps will be in your mailbox on Wednesday or Thursday. Shipping will run $2.00 - $2.75. You'll get the right part for less money. The only thing you loose is not having them in your hand today.

PlainBill

[topj]

Re: Trouble with proview lcd tv 20"

ok , so i got em out, the longer ones are 20mmX8mm 470uf,25V. 3 smaller ones are 12mmX8mm 25v,one of them are 220uf and the other 2 are 470uf , i didnt take out the purple or the other green ones on the right of the pic jus the ones circled Here .

[PlainBill]

Re: Trouble with proview lcd tv 20"

ok , so i got em out, the longer ones are 20mmX8mm 470uf,25V. 3 smaller ones are 12mmX8mm 25v,one of them are 220uf and the other 2 are 470uf , i didnt take out the purple or the other green ones on the right of the pic jus the ones circled Here .

And the brand names are? ESPECIALLY of the ones you aren't planning on replacing.

PlainBill

[PlainBill]

Re: Trouble with proview lcd tv 20"

ok , so i got em out, the longer ones are 20mmX8mm 470uf,25V.

P12389-ND @ $.43 ea

3 smaller ones are 12mmX8mm 25v,one of them are 220uf

P12383-ND @ $.32 each

and the other 2 are 470uf ,

Something wrong here. 470 uF 25 volt caps are 20 mm high - see the first set you listed. Are you sure they aren't 470 uF, 10 Volt?

i didnt take out the purple or the other green ones on the right of the pic jus the ones circled Here .

Now for the lecture. Here is the list of manufacturers of known bad caps. If indeed the caps are a mix of Teapos and Hermeis it is not a matter of 'if they will fail', it is 'when they will fail.' It's going to cost you about $2.50 to replace the caps that have already failed, plus shipping will be about $2.00 more. Don't you think it is a good idea to replace ALL the caps so you don't have to worry about them? Or to put it another way, would you be willing to spend $2.50 more so you don't have to take it apart again?

PlainBill

[topj]

Re: Trouble with proview lcd tv 20"

ok so they are Teapos and i think the purple ones are hermies , and yea i guess i shoudl replace em all, where are you getting these prices and info from? can you show me the link. also as for the 12x8 with 25v thats what it says on it, ill show a picture.

[PlainBill]

Re: Trouble with proview lcd tv 20"

ok so they are Teapos and i think the purple ones are hermies , and yea i guess i shoudl replace em all, where are you getting these prices and info from? can you show me the link. also as for the 12x8 with 25v thats what it says on it, ill show a picture.

Ahh, crap. I went over this once before, but it WOULD be unreasonable to expect someone to search through my 550 + posts for the information. This is the technique that works for ME. Others have other approaches that may be better.

Go to www.digikey.com. Near the top right corner of the page is a box with Part Number / Keyword. Enter capacitor and click Go.

Click on Aluminum.

Under Capacitance select the value you need.

Under Features select General Purpose

Under Manufacturer select Panasonic (Yes, other manufacturers may be as good or better.)

Under Package/Case select Radial

Scroll to the right and under Voltage Rating select the voltage you need.

Scroll back to the left and place a check mark by In Stock, then click Apply Filters

Now I just did this for 680 uF 10 V and got exactly 4 hits. Looking over the specs, I see Panasonic FC and FM in two case sizes. I also note that FM series is rated for a longer life, and costs less. So I click on the Stock Number for the proper case size. On this page I enter the Quantity and click on Add to Order.

Then I repeat the process.

Alternatively, instead of clicking on the stock number, I can copy it to a list. Then someone can simply enter that as a keyword.

PlainBill

[topj]

Re: Trouble with proview lcd tv 20"

yea you were right the 12x8's 470ufs were 10v but the 12x8 220uf was 25v, and the purples where 100uf 35v so what do i need and where do i get em now ? lol

[topj]

Re: Trouble with proview lcd tv 20"

never mind

[topj]

Re: Trouble with proview lcd tv 20"

is this the ones id need for the 470uf 10v?P5126-ND

and for the 100uf 35v these P10294-ND ?

[kc8adu]

Re: Trouble with proview lcd tv 20"

use fc or fm.put either into the search and go to capacitors.

[PlainBill]

Re: Trouble with proview lcd tv 20"

is this the ones id need for the 470uf 10v?P5126-ND

No. You need FM or FC series. I believe M won't work.

and for the 100uf 35v these P10294-ND ?

This one is good.

PlainBill

[topj]

Re: Trouble with proview lcd tv 20"

do they take paypal?

[PlainBill]

Re: Trouble with proview lcd tv 20"

do they take paypal?

I don't know - check their web site! I just use my debit card.

PlainBill