Lg 44nb10rb


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Lg 44nb10rb

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oatis
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Feb 23, 2015, 4:03 PM

Post #1 of 3 (6501 views)
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Lg 44nb10rb	Can't Post

hi! I have a problem. The red color is nearly lost in my lg re44nb10rb projection tv. the picture is curved, and the brightness is lost. The 3 colour shifted from each other. what is the problem? Thanks.

jts1957
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Feb 23, 2015, 10:32 PM

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Re: [oatis] Lg 44nb10rb [In reply to]	Can't Post

Some, if not all, symptoms could relate to defective convergence.
Convergence Out board (IC2701/IC2702 & various 2 watt resistors changed in value or open). May or may not have taken out one or more voltage suppl(ies) when convergence part(s) failed.

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(This post was edited by jts1957 on Feb 23, 2015, 10:34 PM)

oatis
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Feb 24, 2015, 10:55 AM

Post #3 of 3 (6478 views)
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Re: [jts1957] Lg 44nb10rb [In reply to]	Can't Post

Hi jts!
I measured the voltages on the board connector and the voltages are +-5,2v & +-33V. I read the service manual and it writes +-5v & -+26v. I replaced the two stk ics (stk394-250) but nothing happened. Yesterday evening i watched again the red colour and it die away. The crt tube heat is works normally. The bottom of the tube is light a little. Thanks for your help. :-)

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