polaroid lcd tv trouble

[BADHIGEEN]

Hello every one I'm new to this forum and I was hoping that you guys would look at these pics and tell me these cap are indeed bad. (fingers crossed) they are doamed out a bit. I traced the wires from the power plug to this board I am sure its the power supply/amp. The suspected caps read CapXon 1000uf/10v/kf105c. If these caps are bad what would be the best brand to replace them with?
Thanx for any help

[kc8adu]

Re: polaroid lcd tv trouble

those are bad.
i have been using panasonic fc.
all the other crapxon on the psu output should be replaced too.
those sets run very hot!

[Krankshaft]

Re: polaroid lcd tv trouble

I would recommend Panasonic FC series too. You can get them from Digikey.

Those caps are so close to that heat sink I'm sure that attributes to their failure as well.

For future reference whenever caps are bulging even a little bit they are bad and should be replaced. The bulging means that hydrogen gas has been building up inside the sealed can and it will eventally either leak out of the top vent causing a brown crusty solid to form on the vent or it could even explode.

[BADHIGEEN]

Re: polaroid lcd tv trouble

Will pan fl series work?

[Krankshaft]

Re: polaroid lcd tv trouble

As long as they are low ESR and 105 C temperature rated since this is a switcher it is very important not to use general purpose caps.

I was unable to find a datasheet for Panasonic FL series so I was unable to verify their ESR.

[kc8adu]

Re: polaroid lcd tv trouble

fc are much easier to find and are well proven.
i would definately use a non aqueous series.
this novatek chassis runs way to hot for water based caps.

[BADHIGEEN]

Re: polaroid lcd tv trouble

Hooray!!!! It works I took a chance cause I wasn't sure with the fl series they seem to be working fine pip works just like it did when it was new the whynning and wirzring sounds are gone and my channels change again Now on to the mobo threads.
thanx guys

[BADHIGEEN]

Re: polaroid lcd tv trouble

BUMP!!! So my big brother bought the same polaroid as me about a year after I bought my set. He has been using his for pc tv and what have you for about 2 years. About a month ago he noticed the same symptoms I had with my set till finaly the set wouldn't power up. Bro brought the set over today so I could have a look and sure as sh@! the same 2 caps had expanded easy fix I swapped them with the same ones I used on my set and his works again too here is a pic of the caps from his set and the polaroid working again.
Both sets probly would have been trash to me with out badcaps.net forum Thanx again!!!!!

[Krankshaft]

Re: polaroid lcd tv trouble

The Crapxon plague strikes again.

But to be honest the proximity of those mediocre caps next to that IC (a rectifier I'm guessing) is probably the cause for their failure. As you can see another Crapxon just as close to the heatsink is unaffected but the one next to the rectifier package (where most of the heat is generated before it's dissipated) have popped.

Bottom line bad board design.

Glad you're up and running again .

[kc8adu]

Re: polaroid lcd tv trouble

The Crapxon plague strikes again.

But to be honest the proximity of those mediocre caps next to that IC (a rectifier I'm guessing) is probably the cause for their failure. As you can see another Crapxon just as close to the heatsink is unaffected but the one next to the rectifier package (where most of the heat is generated before it's dissipated) have popped.

Bottom line bad board design.

Glad you're up and running again .

all those megmeet psu's run too hot.

[BADHIGEEN]

Re: polaroid lcd tv trouble

So I went to see my daughter today and turns out her Grampa Mike bought her a polaroid from a pawn shop a few months ago just like mine and my brothers. Since then it has stopped working. I brought it home and took it apart guessing it would be the same and sure enough those 2 same caps were bulged out plus 1 more. Blast not as easy as the other 2 sets to fix but mine is a spare set I use for lan parties now. I swapped sets with her and will order a bag of 20 caps from ebay. Its a good thing I saved the box for easy transport.
Here are a few pics.
crapxon kf 105c 1000uf 35v

[JD Danger]

Re: polaroid lcd tv trouble

How do you go about replacing these caps on the Polaroid LCD tv? Do they just snap in or do they need to be soldered? Is this an easy home repair or a professional job? Where do i get these caps?

[PlainBill]

Re: polaroid lcd tv trouble

How do you go about replacing these caps on the Polaroid LCD tv?

(Imitating Arte Johnson), Verrry carefully.

Do they just snap in or do they need to be soldered?

Soldered.

Is this an easy home repair or a professional job?

I do it at home.

Where do i get these caps?

Digikey

PlainBill

[tmwalsh]

Re: polaroid lcd tv trouble

JD Danger, I went to Radio shack way back when and bought a desoldering iron that has a sucker bulb on it. Let it warm up until it will melt the solder, pre-squeeze the bulb, place around the capacitor lead on the solder side of the board, make sure solder has liquified, and release the bulb. It will scoop up the liquid solder, which you then have to spit out onto an appropriate surface (hot, dang it). The leads will be loose or very close to loose and may need minor touch up with the sucker or another soldering iron to get that last tiny bit holding the component in place.
Some use a solder 'wick' which is basically a fabric made of copper. I have some, but don't know how exactly to use it. Place it on the lead, and then push on the iron or get the solder liquid with an iron and push the wick on the liquid solder... I dunno.
tom