Sceptre 32" Flashing (Video)

[smigglet]

Re: Sceptre 32" Flashing (Video)

Nope didnt work. and i left the hair dryer on there for a long time. I checked the capacitor when its normal before it starts flashing, and its 302 then drops to 260-280. The drop occurs after the flash though.

[tom66]

Re: Sceptre 32" Flashing (Video)

Hmm, I really suspect that cap, but cannot rule out other parts of the power supply.
But the 280V is far too low for it to work and explains why it cuts out.

[smigglet]

Re: Sceptre 32" Flashing (Video)

What other parts can i check on the power supply

can i replace that big cap with this one http://www.radioshack.com/product/in...uctId=12466722

[tom66]

Re: Sceptre 32" Flashing (Video)

You could if it is 150uF/450V but digikey will send you a cap for $3 plus about $3 shipping.

[smigglet]

Re: Sceptre 32" Flashing (Video)

got it to work again, but i didnt even do anything to cap, i just unplugged everything from the circuit boards, and plugged it back, plugged poewr cord in, and turned on the tv

[tom66]

Re: Sceptre 32" Flashing (Video)

I really think it is that cap it's just taking longer than I would expect to work.

How long has it been flickering like this?

[smigglet]

Re: Sceptre 32" Flashing (Video)

I can pick up a cap today from radio shack. When I got it to turn on With out the flashing I played on it for 3hours and it didn't flash. I haven't tried to turn it on today. The problem started the day before yesterday.

I also tested the cap after the 3hours of gameplay and it was a solid 302.

[tom66]

Re: Sceptre 32" Flashing (Video)

The cap should be fine. Check the dimensions to see if it will fit. But if you are prepared to wait a few more days, you can get that plus a few other components like the red poly cap which COULD be a cause of the problem.

Before it failed would it flicker once in a while or did it just start doing the repeated flickering?

[smigglet]

Re: Sceptre 32" Flashing (Video)

The cap should be fine. Chepared to wait a few more days, you can get that plus a few other components like the red poly cap which COULD be a cause of the problem.

Before it failed would it flicker once in a while or did it just start doing the repeated flickering?

It just started doing it out of no where. It never flickered before. Got home turned on my TV and it just started flashing

[tom66]

Re: Sceptre 32" Flashing (Video)

Are you going to replace the cap then?
Is the original rated 150uF 450V?

[smigglet]

Re: Sceptre 32" Flashing (Video)

I'm at school right now so i cant see the caps rating, but yeah I can replace the cap and the poly cap just not quite sure which would be best to get there is so much to choose from the site you gave me.

[tom66]

Re: Sceptre 32" Flashing (Video)

Check it'll fit:
http://www.digikey.com/product-detai...378-ND/3134334

Poly cap -- will need code printed on it e.g. "825J 630V".

May also suggest you order the caps for the output side as they are CapXon and well known to have a short lifespan. (I have replaced more CapXon than any other cap. They are truly dreadful parts, but I'm sure it's designed-in so products fail quickly.)

[smigglet]

Re: Sceptre 32" Flashing (Video)

The poly cap isn't labeled...I called my roommate to check it...and from what I can see from the pics it isn't labeled

Sorry for my dumbness but which are the output caps.. I'm about to place my order as soon as I get home.

Thank you for all your help

[tom66]

Re: Sceptre 32" Flashing (Video)

It would be very rare for the poly cap not to be labelled. It might be very fine on one side or the other,

The output caps are the smaller capacitors. I've highlighted them here.

[smigglet]

Re: Sceptre 32" Flashing (Video)

ok got home took it apart, and the poly cap says
1 05 j450
NIS A74

I got the numbers for the other 8 caps, I didnt get the ones that are wrapped in plastic.

Blue ones
-35v 100uf 105c
-35v 100uf 105c
Black ones
35v 470uf 105c
25v 470uf 105c
10v 1000uf 105c
10v 1000uf 105c
10v 220uf 105c
10v 220uf 105c

Today i took it apart and put it back together, and its been working since yesterday, no more flashing. Ever since i unplugged all the cables and plugged them back into the circuit board, the tv has been working. Like you said though, the same way it fixed itself, it could go bad again. I am still going to order all these caps.

I went to radio shack today, to see if i could find the big cap, and you were right, i looked at some of the caps, and they werent labeled like they were advertised on the barcode.

[tom66]

Re: Sceptre 32" Flashing (Video)

The ones wrapped in plastic are inductors, and do not need replacement.

Film cap:
http://www.digikey.com/product-detai...6827-ND/953263

100uF 35V: http://www.digikey.com/product-detai...0294-ND/266303
220uF 10V: http://www.digikey.com/product-detai...2TB-ND/2504118
470uF 35V: http://www.digikey.com/product-detai...0301-ND/266310
(replace the 25V with a 35V cap too.)
1000uF 10V: http://www.digikey.com/product-detai...7CT-ND/3072197

[smigglet]

Re: Sceptre 32" Flashing (Video)

Youre freaking awesome!!!!!!!!! Thank You. I will reply to this thread, when i get them in the mail, and install them.

Greatly appreciate your help. Glad there is still nice people out in the world!


Edit: One last question, the big cap above the poly cap that weve been testing. It has glue or some silicone around it, can i just cut it off with a blade?

[tom66]

Re: Sceptre 32" Flashing (Video)

Yes, you can pry it up or cut it with a knife. Do not worry about damaging the old one. You are throwing it away. PLEASE check that it is 150uF before you order though. (Please do not attempt to run the TV with it missing, it will damage the PFC circuit.)

I am just glad to save stuff from landfill, too much goes to waste nowadays.

[smigglet]

Re: Sceptre 32" Flashing (Video)

Glad i went back to check the big CAP, it doesnt show the numbers because half of it is covered in silicone paste. What i can see, it says:

KM 105*c
P1034
VENT

RoHS
2002/95/EC

When we tested it the voltage was 302.

[smigglet]

Re: Sceptre 32" Flashing (Video)

unsoldered it and checked it, its a

450v 68uf 105c