Question about Samsung HCN4226W 42" Rear Projection HDTV-Ready Television
Hi, I have a Samsung 42" TV HCN4226W amd warranty period is expired. When I switched it on yesterday morning, every image has a ghost image with three colors Red, greena and blue speaced apart by an inch or so on the screen. I called up samsung service center and they said it would cost me 400 USD. Though i never opened a Television set, i want to fix it myself as i don't want to ridiculous amount of money. Could anyone suggest a step by step procedure of what to do? I read in some of the problems posted and i think mine is a convergence problem too. Would it be fixed by replacing that board with the amplifier? Could anyone tell me which one to buy and where to buy? I would really appreciate your help. Thanks in advance, Satish.
Hi. MikeNJ1964 is spot on however providing you can use a soldering iron its not to difficult to do. You will need a soldering iron & solder 0.7mm or 0.9mm in diameter no bigger than this, 2 x converge Ics, solder mop/wick. tube of heat sink compound. DO NOT CHANGE JUST 1 X IC CHANGE THEM BOTH. If you arent sure at all or competent to do this job leave it to a profesional to do for you. The convergence Ics are only amp chips but in saying that you must fit the exact type the numbers / letters must be identical they usually start with STR****. To gain access to the Ics remove bottom back cover I cant remember wether you need to remove upper part of back in order to remove lower. If you do need to remove upper back please BE CAREFULL this is heavy it holds the mirror do not touch the mirror with your fingers you will leave greasy marks, Do not unscrew mirror from the back casing. Once back is off look at the circuit board you are looking for 2 large aluminium finned heat sinks which will be directly next to each other, On these heat sinks will be the 2 str Ics. Before you attempt to just pull out wires take photographs with a digital camera of all the plugs & sockets on the board that has the 2 x Ics This will be really helpfull if you forget where things plug in to. You can allso make note of plug orientation & colour of wires going to each plug. Now unplug plugs from the sockets on the board that has the 2 x Ics the board will have some screws holding it in place remove these & lift board clear of the set. Now using you braid/wick desolder the 2 x str Ics. remove them ensure you do not damage the copper pads when desoldering. Clean off the old heat sink compound from the heat sink this looks like white grease, Apply liberally new compound and fit the new Ics, Solder them in ensuring that you dont blob accross any of the legs, You will need to check the fuses near the Ics these are normally all yellow or all green & look like a resistor. If they are open circuit they will need replacing but quite often they are ok. Now refit all plugs look at the pictures you took & notes you made when you do this to ensure everything goes back in to correct place. Fit the back Panels on & switch TV on. Hopefully the convergence will only be out slightly you can go in to the customer settings to adjust the convergence as best as you can get it. Should it need more than adjusting than you can do in customer settings let me know & I will email you the convergence settings you will need to do using secret engineers menu. Good luck Chris.
Posted on Sep 02, 2007
I have convergence problems with mine, it's a pretty common symptom with projection tv's, you can adjust this in the settings menu, go to function and then convergence and you shouldn't have to pay anyone anything.
Posted on Aug 25, 2007
If you have never opened a TV set or unsoldered and soldered electronic components and if you have never aligned the convergence circuits on a projection TV, then please do not attempt to fix your TV yourself. Have the set looked at by a qualified tech. Although Samsung said it will cost $400, a good tech will replace the defective convergence IC and pico-fuse and realign the convergence for less. When I do a housecall for a set like that I charge $150, so ask your local shops what they charge.
Posted on Jul 19, 2007
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