Emerson LF320EM4 A after surge

[Rjj22783]

Hello everyone, I have an Emerson tv that recently got damaged due to a lightning strike. It has picture and sound but I heard a buzzing sound coming from the back. i opened up the tv and traced it to a blown capacitor. now I have no expeirience with electronics, but the field had always interested me. anyway I am trying to find a replacement capacitor but ant find the values on the capacitor itself, I dont think. I hope the picture helps. Thank you in advance for any help or information.

[selldoor]

Re: Emerson LF320EM4 A after surge

The values will be on the other side. CARE when handling - set off and unplugged - even then you should test across the legs with a multimeter on volts DC 600.
It is probably 100uf 400volts

They are usually glued down?

[Rjj22783]

Re: Emerson LF320EM4 A after surge

Yes, it is glued down, any tips on removing it without damaging anything? By the way, thank you for such a quick reply and the information.

[SteveNielsen]

Re: Emerson LF320EM4 A after surge

A small amount of force prying on the non-lead end should free the cap from the glue. The only caution in that is to not damage the board with the tool used to pry it off.

[truep]

Re: Emerson LF320EM4 A after surge

Why do you think it's bad? Those rarely fail. If it's buzzing, the rectifier may have one side out Check the voltage.
Set meter for 600V, check across the two pins. Be careful NOT to touch any of the heat sinks as they will be hot and can give a nasty shock!!

[Rjj22783]

Re: Emerson LF320EM4 A after surge

I should have posted a pic of the bulge in the capacitor, also leaking.

[selldoor]

Re: Emerson LF320EM4 A after surge

I should have posted a pic of the bulge in the capacitor, also leaking.

Hahahahahah - yes you should - at least you dont have to worry about
damaging it - just snip the legs and it might twist off the glue.
As it has leaked you should clean the area up with Ipa


Also perhaps test the rectifier - in case it has been damaged.

[Rjj22783]

Re: Emerson LF320EM4 A after surge

got it off, labeled 200v 330 85c. any recommendations as far as where to get one? thanks to all for the help by the way.

[SteveNielsen]

Re: Emerson LF320EM4 A after surge

That's a 330uF 200v general purpose cap, should be easy to find and inexpensive. I agree you should check the rectifier and also check that fuse, F602.

[Rjj22783]

Re: Emerson LF320EM4 A after surge

Going to check both, it seems that there aren't really any stores that stock capacitors, looks like everything is online, lol. Does that seem about accurate?

[SteveNielsen]

Re: Emerson LF320EM4 A after surge

Yep. Actual on the boulevard electronics parts stores are a dying business.

[selldoor]

Re: Emerson LF320EM4 A after surge

200v - must be just made for the US market.

Hmm there doesnt seem to be an actual rectifier on this board it is 4 diodes
Please can you post a good clear picture of the top and bottom of the board
using manage attachments jpgs less than 3mb work

[selldoor]

Re: Emerson LF320EM4 A after surge

Sorry just another thing - dont get one from ebay and dont get one from radioshack

[kev1n69]

Re: Emerson LF320EM4 A after surge

And make sure to get the 105 degree version for longevity the 85 degree is obviously not rated high enough as it vented.