LG LCD TV 37LD420


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LG LCD TV 37LD420

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Anders O
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Mar 17, 2015, 8:41 PM

Post #1 of 6 (1673 views)
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LG LCD TV 37LD420	Can't Post

HI, I have a 37" LG TV. &lt;br&gt;Right side of the screen is black and the other side looks a bit dark as well. &lt;br&gt;When I opened up the back of the TV I did only see the back light on the left side. Right side was off, I swapped the Power between left and right, then i got light on right side an no light on left side, so the back light seems to be ok, seems like one cap is blown on the Power bord, is it enough to replace it or would you replace anything else as well?

http://i1238.photobucket.com/...3/lg_zps2pdpmhyv.jpg

Many thanks
Anders O

(This post was edited by Anders O on Mar 17, 2015, 8:59 PM)

jts1957
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Mar 17, 2015, 9:53 PM

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Re: [Anders O] LG LCD TV 37LD420 [In reply to]	Can't Post

Try just the cap first.

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Location: Far, Far Away

Anders O
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Mar 18, 2015, 1:41 PM

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Re: [jts1957] LG LCD TV 37LD420 [In reply to]	Can't Post

Where can I get the cap needed?
It is labled 5J 6KV, I have Googled some, but didnt find it.

Br
Anders O

jts1957
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Mar 18, 2015, 4:57 PM

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Re: [Anders O] LG LCD TV 37LD420 [In reply to]	Can't Post

Most large US distributors appear to be 'out of stock' on the 5pfd 6KV ceramic disc capacitors you're requesting.

However, as you learned in school, (yeah, right Tongue

), TWO 10pfd 6KV in series will equate. (Encapsulate in a large dab of silicone after installing to prevent center splice from arcing/corona)

http://www.digikey.com/...apacitor&stock=1

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(This post was edited by jts1957 on Mar 18, 2015, 5:02 PM)

Anders O
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Mar 18, 2015, 8:40 PM

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Re: [jts1957] LG LCD TV 37LD420 [In reply to]	Can't Post

Is it safe to just replace one 5 pf with a 10 pf instead?

Br
Anders

jts1957
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Mar 18, 2015, 9:22 PM

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Re: [Anders O] LG LCD TV 37LD420 [In reply to]	Can't Post

Again. A 10pfd in series with a 10pfd equals a 5pfd.

If you must go with single capacitor(s) (to avoid the splicing/encapsulating?), replacing BOTH the working (the one below the one you have circled) and the burnt capacitors with the SAME value is probably more important. You can probably get away with any two (a 3.3 & 3.3; or a 4.7 & 4.7, etc.) in the 3.3pfd - 10 pfd range. Just be sure they are rated 6,000 volts (or higher).

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(This post was edited by jts1957 on Mar 18, 2015, 9:22 PM)

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