element 32 inch lcd shuts off after 15 min

[ohmmy]

Re: element 32 inch lcd shuts off after 15 min

C38 replaced. rhere is a transistor to the bottom left of hs2 (heat sync) 2. That is q6. Immediate stop in hiss when I freeze it. Its a 2n2222 im looking for a replacement. I took a pic of the bottom of the power supply. Ill post asap

If freeze spraying that transistor cures the issue then that's definitely bad. When you freeze spray it, does it immediately evaporite over the transistor? If so that usually indicates a faulty part. Generally a hissing transformer means there's a short somewhere and it could very well be that transistor.

[freakaftr8]

Re: element 32 inch lcd shuts off after 15 min

No it doesn't immediately evaporateover the transistor but the hissing stops as soon as I spray it.

[ohmmy]

Re: element 32 inch lcd shuts off after 15 min

No it doesn't immediately evaporateover the transistor but the hissing stops as soon as I spray it.

Test it. Also check for cold solder joints through out the board.

[freakaftr8]

Re: element 32 inch lcd shuts off after 15 min

Funny. 2n2222 is an old motorola npn switching transistor from the 1970s. Old design. All my subs are newer. Darn. I get like 5.4mohm ambient. 5.6mohm frozen.

[ohmmy]

Re: element 32 inch lcd shuts off after 15 min

Have you noticed any cold/cracked solder joints anywhere? The freeze could be providing a temporary connection if there are some.

[ohmmy]

Re: element 32 inch lcd shuts off after 15 min

Also, have you replaced the electrolytic cap c38 or the other ceramic c38 to the right of it? Try spraying that one see what happens.

[freakaftr8]

Re: element 32 inch lcd shuts off after 15 min

Yes both caps changed. As a matter of fact I went ahead and changed all the caps on the hot side except for the main filter cap

[budm]

Re: element 32 inch lcd shuts off after 15 min

I will have to see the bottom side so I can trace out the connections to see how the circuits are setup.

[freakaftr8]

Re: element 32 inch lcd shuts off after 15 min

Well I threw in the towel. Put a fan on the power supply and its been running all night long. Think the transformer itself is bad. Sorry I couldn't post pics. I was trying to fix thisTV for the least amount possible because it's going to a friend that doesn't have a TV for her family I'm giving it to her

[freakaftr8]

Re: element 32 inch lcd shuts off after 15 min

I started a new post on another TV I just picked up.

[freakaftr8]

Re: element 32 inch lcd shuts off after 15 min

Well even with the fan. Bad idea for long term. I know its still shutting down. Any ideas?

[selldoor]

Re: element 32 inch lcd shuts off after 15 min

Yes - post the pictures you keep promising!
They need to be good and clear - well lit no flash
close ups of the area you spary and it fixes it might help.

[freakaftr8]

Re: element 32 inch lcd shuts off after 15 min

Yes - post the pictures you keep promising!
They need to be good and clear - well lit no flash
close ups of the area you spary and it fixes it might help.

I will take some more pictures when the TV is in my possession.

[Gary Jerome]

Re: element 32 inch lcd shuts off after 15 min

what are the pin designation for the element elcfw327 power supply

[budm]

Re: element 32 inch lcd shuts off after 15 min

@gary, so far we do not see any pictures of the boards so we cannot tell which version of this TV is. There are more than one version of this model.
http://www.shopjimmy.com/catalogsear...ement+elcfw327