Question about Samsung HCN4226W 42" Rear Projection HDTV-Ready Television
My problem is with the Samsung HCN4226W, Bow-tie effect (Blue color only). When I run the Perfect Focus, it will do the Green, Red and when it does the Blue it runs and runs at 44 percent and eventually returns to the Menu without any changes. Is this a convergence board problem or IC's and if so, what are the part numbers. You can see the problem in the attached photo. Thanks for your help.
SAMSUNG Convergence Problem
It looks like blue convergence. Look at menu, select convergence and see if blue top is bent down on convergence adjust screen. Probably won’t adjust.
Some Samsungs have convergence IC’s on a separate convergence board in the back of the TV. Others have the IC’s mounted on the main deflection board. Either way the board has to be removed to get at the dud IC’s and associated burnt resistors.
You remove the appropriate board, determine if any resistors are burnt or damaged, replace any burnt or out of tolerance resistors, replace 1 or 2 IC's and re-install the board.
Now you have to adjust it to look like new.
If the unit has not been misadjusted and everything is OK now, running the auto focus may put the picture back to it’s previous stunning quality as it was before IC failed.
If after Perfect Focus it is still misadjusted noticeably, try the customer convergence adjustments. Operators’ manuals are available on web through searching.
If convergence can not be adjusted properly, you messed up chip install or resistors may be wrong value or open; or it needs major adjustment.
If you live around Calgary, Alberta try me instead:
Or try to the find the repairperson part of this website (on the Homepage) and search postal code. Maybe you will be lucky and someone from your area is listed for Projection TV repair.
Most rookies doing this job will cause damage and not be successful. They will pay double for someone to fix their mess or end up scrapping the TV. It is not a simple task. It is more difficult than batteries on a remote.
Posted on Jun 27, 2008
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Posted on Jan 02, 2017
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