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

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Convergence problem, i want to fix it myself

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.

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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

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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

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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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1 Answer

I recently bought a samsung hcn4226w at a yard sale for $50. Thought it was a good deal, but when i got home I saw the picture had a double image and the picture doesn't seem bright. After some tinkering...


This tv have convergence problems.Ur tv convergence board the 2 STK convergence ICS are defective,and some or all it resistor are dead.Try website like Tvrepairworld.com to buy a whole refurbish convergence board for the replacement.Spend about $100 dollars more this tv can be save.

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TOSHIBA TV- HCN4226W convergence PROBLEM


I charge 285.00 at my shop ,so if you cannot fix it your self you are looking at repair anywhere from that price or more .You have 2 STK ics these are your convergence Chips .You would need to replace both of them.If you can solder you have it made.

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Replace convergence IC'S and check values of convergence circuit resistors.

Aug 07, 2008 | Samsung HCN4226W 42" Rear Projection...

1 Answer

Hcn4226w samsung


Hi,

The most common problem with all 3 tube rear projectors is a damaged convergence circuit. The Samsung TVs are easier to repair than many others and the numbers that break down is not excessive. For every Samsung with a convergence problem there are a large number that did not breakdown. The fault is caused by bumps or noise in the AC power, not the TV design. This usually produces colored outlines around heads, etc.

Check out the Convergence Gallery. If you see the colored outlines or color shading as in the Gallery, you have a convergence problem.

This requires the replacement of the defective IC or ICs and any damaged or smoked resistors. Usually there is little alignment required after the repair. If you play with all the adjustments before the fix, hours may be spent re-aligning.

Don't monkey with it.

This is a delicate and difficult repair. If not done by someone with some electronic repair experience, the TV will likely end up as junk or cost considerably more for a tech to fix the damage done.

If you live in Calgary, call me. If elsewhere, find a competent tech.

easyab

Aug 04, 2008 | Samsung HCN4226W 42" Rear Projection...

3 Answers

Samsung HCN4226W Rear Projection TV


You can get the convergence board by clicking here.
The service manual you might buy it from the same place.

May 23, 2008 | Samsung HCN4226W 42" Rear Projection...

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Samsung HCN4226W Green Tint Around Corners


sounds like the alignment of the convergence in that area needs to be preformed or you have a speaker or something in that corner

Mar 10, 2008 | Samsung HCN4226W 42" Rear Projection...

2 Answers

Convergence issues?


most likely the convergence board.
Ordered complete convergence board, ask samsung for part number Convergence AMP PCB $108.44, from www.samsungparts.com
or could send it in to ptscorp.com for repair.

Dec 23, 2007 | Samsung HCN4226W 42" Rear Projection...

2 Answers

Convergence problem?


That board, P/N Bp94-00155a should fix the problem and be fairly easy to replace. Make sure you unplug the TV before starting the repair though. Duh!

Mar 11, 2007 | Samsung HCN4226W 42" Rear Projection...

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