Question about Samsung HCN4226W 42" Rear Projection HDTV-Ready Television

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Bowing and ghosting

My picture is bowed in and has some ghosting or shadowing taking place. Any ideas????

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Replace the pcb convergence board,, It costs $96 and takes 10 minutes to replace you will have to manually line up your convergence afterward as the settings go to factory default. Everyone that owns this set has or will have to replace this part within 3 years
http://www.samsungparts.com/search/search.asp
Or Vance baldwin online
Part number bp94-00155a

Posted on Jan 22, 2008

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Posted on Jan 02, 2017

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ok meoff check the convergence circuit. shadow in the picture is defective convergence circuit... replace a new.

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1 Answer

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The STKs are common and if you have an experienced electronics tech around they can replace them for much less money but the tech must have advanced soldering and IC exchange experience.

The STK ics, two of them, can be purchased on line for around $20 to $40 each.

http://www.partstore.com/GetModel.aspx?MfgName=Toshiba&BrandName=Toshiba&ModelNu...

Partstore has two models available - one for around $40 and another for around $55.

The part number is STK392-110 and if you google you can find them for as little as $6/each but I don't recommend the cheap ones as they are not reliable.

It takes a good tech around 3 or 3 hours to take the old ones out and solder in the new ones. Also, it is likely one or two resistors are burnt and will need replacing as well.
· http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
· http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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1 Answer

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KIT10 $29.50
Repair Kit for Hitachi convergence Chassis DP-14G
KIT10 Includes 2 pcs STK392-150 , 1 each of the following 1W axial lead fusible resistors:


http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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1 Answer

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The two convergence IC's part# STK392-570 need to be replaced - about a $300-$400 repair.

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Replace convergence IC's--then re-check convergence alignment in servicer mode,if necessary.

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