Question about Hitachi 51SWX20B 51" Rear Projection Television

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Pulsating Picture My 51swx20b is 3 years old. The picture is pulsating on the left and right of the screen. If you turn on the convergence screen, you can see the convergence lines moving in and out, sometimes slowly and other times rapidly. The colors are aligned on the grid. Any ideas? Thanks, Kevin

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Re: Pulsating Picture

Your set might have loose conections ,a few places to check is the horizontal driver transformer and the convergence IC's,they develop loose conections and need to be resoldered,if you are familiar with tv service and soldering is something you could do ,some conectors might get disconected when you flip the board,but if you are not too familiar I would suggest you call for assistance from a servicer.Besides the places I mentioned I am sure the set has other overheated places that need resoldered as well.Let Us know how it goes.

Posted on Oct 26, 2006

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There is a red shadow on the picture, mostly on the left hand side, and the picture is a bit blurry

Projection sets have two very common problems.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya

Jun 04, 2010 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

Distorted picture

You have a convergence problem.On this model you can change the convergence amp board which has the convergence IC's on it making it an easy repair.

Oct 06, 2007 | Samsung HC-P4752W 47" Rear Projection...

1 Answer

Picture "pulsates", becomes small and fuzzy

Ur convergence is dead.Need to buy the convergence kit use it parts.U know how to solder right?Tries these websites,Tv Repair,or

Sep 20, 2009 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

My tv goes blank with sound only.

tough call. from your decription it could be the tubes the pulsating. but if i had it in the shop i wwould first look at the convergence curcuit. the fact that the on screen display come up in colors inidcates convergence problems. you might have multiple component falure there. as for cost it could be diddicult to say. average repairs like this barring piture tube problem at my shop run 200 labor and about 150 parts. this is just for convergence cuircit rpair

Jun 19, 2009 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

Picture has a blue shadow

Seems convergence out IC is fried in TV so it gives blue shadow.

Check out Convergence Out IC which you need to replace in TV, if you have enough experience of repair of big TV, necessary tools and know basic electronics.

Dec 18, 2008 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

Sony KP-53XBR45 convergence

Hey, found the problem. Your Convergence IC chip went bad. Buy one at Bluestar International Components ( - order part number STK392-010 for 6.99. I've read that there are two in the system and replacing them both at same time is a good, order 2. Now, if you are handy, it will require you to open the back of the TV and solder out the old chip and replace with new. If not, then you might as well call a TV repair person and have them fix. However, every place I've called works on a minimum fee for "large screen TVs" - the cheapest I could find in Atlanta was $399 minimum service fee. So, I'm going to risk the home sodering job .... it's a 10 year old TV and as good as it's been to me, if I screw it up, I feel I've gotten my money out of it. Good luck with your repair. My parts are on order.

Oct 15, 2008 | Sony KP-53XBR45 53" Rear Projection...

1 Answer

Old Projection telvision on the fritz

you need to change the CONVERGENCE ICs , if you cant do it then it needs to be serviced by a HITACHI authorize service shop , hope this helps AJ

May 27, 2008 | Hitachi 51SWX20B 51" Rear Projection...

2 Answers

Hitachi 51SWX20B Convergence problem


Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence or magic focus section.

Try to adjust the convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Its a fairly easy fix on the Hitachi sets.

You can get a repair kit that includes all the parts from The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself.

Jan 28, 2008 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

Picture Pulsating

I have the same set. I solved this by turning off the dynamic contrast or adjusting the contrast and brightness settings down.

Dec 30, 2006 | Philips 60PP9202 60" Rear Projection...

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