Question about Samsung HC-P4752W 47" Rear Projection HDTV-Ready Television

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Blue only misaligned

My convergence let go in two steps, the blue was misaligned first and then a few months later the whole thing let go and I had the whole picture dipping down from the top.  Based on information found here I replaced the STK packs (thanks!).  The picture came back to normal proportion, but the blue is still misaligned.  I entered into the service mode (again found here - thanks) and can adjust the blue up and down, but not right and left.  Red and green are fine.  Did I miss something?  What else can I do?

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Re: Blue only misaligned


Posted on Jan 15, 2008

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The blue lines on the left lower side of the tv will not converge. The tv has never given me a problem. I woke up one morning and powered it on and noticed the blue is misaligned. I tried converging and...

This problems can happen to the DLP tv any times of it tv life.Tv is 100% have a convergence problems.The 2 STK convergence ICS and some or all it resistors are dead.These parts on the tv convergence board,must be replaced to solved the tv picture convergence problems.The shop,will cost u like $300-350 for parts and labors.

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This tv have convergence problems,it dead.Red,green,blue misaligns colors,have colors shadows,3d colors pic like.All these problems are the convergence board have 2 STK convergence ICS some or all it resistors are dead.These parts must change to solved convergence problems.The shop will cost u $300-350 for parts and labors.

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Cloudy Blue Color Covering Whole Screen

I think its time for sony to face a claas action, they do not supply parts in less than 7 years, and the unit should not have been sold so $high, they should buy them back, that is the best solution

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Step by step repair guide for blue convergence problem

Good Day;
Symptom: Blue convergence off, bowed inward at the top and bottom with No blue vertical movement.
Cause: Replace IK05 (STK392-110) and RK54 (2.2/1W) and converge.
Buy KIT10 at 1-800-458-6053, it contains all upgrades and parts needed for repair. Good Luck, big IRISH.

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1 Answer

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Hello rogeuryder,

This is the one thing that even make TV repair persons shudder. You don't really have a convergence problem in the normal sense. The convergence works. What you have is a misaligned convergence situation which any documentation and or book on TV repair will tell you that at this point manual convergence adjustment is needed and the only thing you will have to do is keep trying to adjust the convergence until you get the center aligned, and then work towards the outer edges using both static (Center) and dynamic (outer edges) convergence techniques.

As this may sound it is; Very Very Tedious.

Here is something that may help you:,M1

I have used this book when I use to teach TV repair. I hope you discover what I am tried to convey in my e-mail, this is no longer a question of can you fix a TV? It has become a question of do you have the patience to adjust a TV.

Good fortune in doing this, you will succeed if you just take your time and do static convergence first and then do the dynamic convergence with the manual controls. The procedure will be in the service manual.

I hope this helps

Thank you,


Jul 25, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer


Hello pk95953,
Your one and only problem is a bad convergence Amp board. Changing it will fix your set. You can contact for step by step assistant with installation of this board.
List price $100
Part Number: BP95-00142P
Best regards

Apr 24, 2008 | Samsung HCN653W 65" Rear Projection...

1 Answer

Blue Convergence

Hello All Above,
Your one and only problem is a bad convergence Amp board. Changing it will fix your set. You can contact for step by step assistant with installation of this board.
List price $100
Part Number: BP95-00142P
Best regards

Mar 11, 2008 | Samsung HCN653W 65" Rear Projection...

1 Answer

Blue Non-Convergence

These sets quite often lose their memory and can be adjusted with remote control , but , MORE often I have to change the convergence amplifiers. There are two amps with 3 channels each for the up/down left/right for each colour . You did not say if the blue was curved with this displacement , if so AMP or fusible resister . If resister open I will change the amps as a pair. You will need to clean the old heatsink grease off(it will be baked on) and apply a fresh thin coat .

Sorry not for the faint of heart or lack of soldering/desoldering
experienced .
The remote control buttons change their functions when in convergence adjust mode . Let me know If you want the overlay and instructions to adjust.

Hugh Ireland

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I had the same problem on my Hitachi rear projection TV 53FDX20B made in Mexico. The blue convergence problem. Blue focus had shifted and appeared like a blue ghost image. I followed the step by step intructions from the fixya site. First Replaced the two STK 392-110 ICs and turned on the tv. No change. Then I went looking for the bad resistor. There was one resistor RK50 (2.7 ohm, 1Watt capacity) which is attached not right close to the printed circuit board surface but was well raised up from the board. The bands on the resistor were a little discolored. I replaced that one and turned on the tv. The convergence problem was solved. Thanks for the step by step instrucitons on your site.

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1 Answer

Blue and Yellow doubles

Well, fortunately the television that you purchased has an auto-convergence feature. What is happenning is that your color lamps are misaligned, did it get moved at all recently? Anyway, in your menu you should see a "Convergence" menu, and inside that menu, a section called "Perfect Focus". Run Perfect Focus in this sequence: Green --> Red --> Blue After that your picture should look great, if not try tinkering with the manual adjustments on the "Convergence" menu. Here are some URLs that you might find helpful: (just copy+paste into your browser) Your Television On Samsung's Webstire: Your Television's User Manual (Download And Open With Adobe PDF Reader) (The "Convergence" Menu Is Section 3.3)

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