Samsung HC-P4752W Ghosting, seeing yellow, bowed lower left
When I turned the TV, it looked blurred, or 'ghosting', with yellow onto the left. Any kind of words that are on the screen are in 3d. Is this a indication that the CI's are burnt out. If so when I take the subboard out how do I remove the Old CI's? I know I must solder but any advice would be greatly appreciated.
What might be happening is that your convergence is out of adjustment. Before removing the Convergence ICs try to adjust your convergence either from the onscreen adjustment (see your owners manual) or by using a signal generator (if you have one). I am against this "lets start swapping parts out" craze that has become the norm because you never fix the cause of your problem just the symptoms. I would suggest trying to adjust the convergence first.
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Have you tried to use the convergence function on the TV? If that has not fixed this issue then you have bad convergence IC chips. These chips are microprocessors that align the blue and red tubes with the green (which is stationary). This converges the three tubes to create the image that you see. Failure of these chips (usually from heat over time) is a common problem with projection TVs. The chips are not very expensive; from $35-60 for the pair. Replacing them involves some tedious desoldering of the old ones and soldering in the new ones. If you have some experience with electronics and soldering it is not hard. Shops will charge $300 and up for this repair. If you want to do it your self post a comment bnack here and I can assist you further.
You dont have to remove the aluminum heat sink. The ICs are attached with screws and then just unsolder the ICs from the circuit board and then replace the new ics into the pin hole locations after applying heat sink compound onto the back then screww the new ICs to the heat sinks then solder the pins. Very easy repair.
Not sure of the part number most use STK392-110 or 120s . You will need to look at the ics in your set they will have the IC numbers stamped on them they will have STKxxx-xxx whatever that number is thats the sanyo part number for those ICs
im sorry for this not being a solution, but I have the exact same issue Jose. It just happened 3 days ago. When I run auto focus it says check factory default settings. Will replacing the 2 CI's help cure this problem.
You will need to replace or have the main convergence amp board replaced or have the main amp ICs replaced. i you have no electronic experience with printed circuit boards, play it safe and call in a pro to assist you with this repair. Good Luck
The convergence ICs probably have a cracked solder joint on the foil side of the circuit board.
Re-flowing the the solder would help.
I will always replace the convergence ICs when doing this job. The labor remains the same and you will have to pay a few extra bucks for the parts.
To fix this yourself, you will need to be able to identify the two convergence ICs, have a basic knowledge of electronics and be able to use a soldering iron. You will also have to do an alignment through the service menu.