Question about Hitachi 53FDX20B 53" Rear Projection Television

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Distorted Picture TV is 6 year old. Worked fine until today. Picture is focused, but all 3 colors are"shifted" around. Any suggestions? Thanx, ALEX

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  • STARB Jun 27, 2008

    It is like seeing tripled objects in magenta, green and blue. Please help.

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The two convergence Integrated Circuits or ICs need to be replaced on the board, if that for some reason still doesn't fix the problem, please let me know

Posted on Jun 27, 2008

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If the fuzzy picture you are experiencing looks like, at least in some places over the screen, like misregistration of the colors it may be the failure of the convergence ICs.

Hope that helps.......

Posted on Jun 27, 2008

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Color shifting can be due to both internal and external disturbances of the magnetic field.

if there is any external magnetic objects please remove them and try it.

else it may be some internal parts.


Posted on Jun 27, 2008

  • 1 more comment 
  • dewan nafees ahmed Jun 27, 2008

    many people having this hitachi set seem to have this problem from before.

    You have what most big screen rear projectors face at least once in
    their life time: Convergence failure. There are two ICs called STKs
    that go bad and they need to be replaced.



    If an outside tv expert comes in to repair it the cost is always around
    $400 for the job. The only way to keep it down in cost is to do it
    yourself but you must be an experienced technician and know how to
    solder in replacement ICs.



    WIsh I had better news for you.
    source:en.allexperts.com


  • dewan nafees ahmed Jun 27, 2008

    Convergence is set by following the instructions in your owners manual.
    Always try that first. But, if the convergence has failed you will
    not be able to align it until the STK chips have been replaced.



    Hitachi calls their convergence Magic Focus and explains how it works in the manual.



    In your manual it is on page 45(sorry if page number is wrong) and says, in part:



    ---------------

    SET UP

    45

    SETUP

    Your HITACHI Projection TV has three color projection tubes: one for
    red, one for green, one for blue. When mixed together in the

    proper proportion, the output of these three color tubes can produce
    any color. To produce these colors, however, the beams must be

    precisely aligned over each other so that the colors can be mixed. The
    process of aligning these picture beams is called òconvergenceó.

    Over a period of time, the picture tubes can drift out of alignment due
    to normal bumps and vibrations or moving the TV. If you move

    your TV, or if, after a time, you notice color rings or halos around
    objects in the picture, you may want to converge (align) the colors.

    Properly converged, the lines appear white, which is actually a
    combination of the outputs of the three color tubes. The output of the

    green tube is stationary. The outputs of the red and blue tubes can be
    adjusted. When properly aligned, the outputs of all three tubes

    should be directly over each other to produce the white lines.

    To simplify convergence, HITACHI incorporates a function called MAGIC FOCUS located on the front control panel, which allows the

    TV to self-adjust. Press this MAGIC FOCUS button and the convergence self adjustment willl start and this process will take

    approximately 15 seconds. If this button is pressed during this
    process, no change in picture quality will occur. After this 15 second

    self-adjust period, picture quality will be optimum. (Do not move the TV during self-adjust.)

    You may also select MAGIC FOCUS from the SETUP Menu.

    NOTES: Only a momentary press of the MAGIC FOCUS button is necessary to start AUTO DIGITAL CONVERGENCE. At

    anytime during this convergence correction process, you may press the MAGIC FOCUS button to exit the MAGIC

    FOCUS mode.

  • dewan nafees ahmed Jun 27, 2008

    hope it helps.

    thank you

    dont forget to accept MY solution if u go by it.

    feel free for asking any doubts u have.

    thank u for ur cooperation.

    good luck for getting fixed soon

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Could you explain a bit more clearly by what you mean by "shifted"? A pic here would help..

Posted on Jun 27, 2008

  • Swilin Sampson
    Swilin Sampson Jun 27, 2008

    You will need to replace the convergence IC's on the main board.

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1 Answer

51 Hitachi rear projection 6 years old, can't get it to focus, Has sound. Can only get the picture to come in abpout 80%. Around the perimeter, sports scores and subtitels are not readable. Used the fucus...


Flash Focus magic button no longer work.The tv have a problems known as a convergence problems,it dead.Tv colors lines R,G,B mis alignment,have colors shadows pictures or 3D pictures problems.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts,must be replaced on the tv convergence board to solved the tv convergence picture problems.The shop,will cost $300-350 for parts and labors.

Oct 13, 2010 | Hitachi 51F500 51" Rear Projection...

1 Answer

I have a Hitachi Projection TV 51G500A 2004 ,


These sets have several common problems which are listed below.

Problem #1) Convergence

Yours may have one or more of the following symptoms
  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted or warped
  • No Audio/Video - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV may have one or more of the following symptoms....
  • Dull looking picture
  • White looking picture
  • Halos around objects
  • Red/Orange looking picture

You can see some more examples and find the fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Apr 03, 2010 | Hitachi 51G500 51" Rear Projection...

1 Answer

I'm having a problem with the color green being distorted on my TV. Is this a color tube issue, bulb issue, lamp issue?


This is a picture tube type TV. No lamp.
You don't describe the distortion.
A colour green picture that is twisted and shifted away from the other colours is a convergence problem. see Projection TV Convergence on this site.
If the green is smeared, out of focus, larger than the other colours like a halo around objects, things like that, it is the green picture tube. Sony has discontinued most of the picture tubes so you may not be able to get this fixed.

Mar 31, 2010 | Sony KP-46WT520 46" Rear Projection...

1 Answer

Ghosting and bad color, sound is fine.


The most likely cause is shorted convergence chips and possibly a few pico fuses.

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,Pioneer2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

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

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*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

You can see some more examples and find a fix herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 15, 2010 | Sony KP-57WS510 57" Rear Projection HDTV

1 Answer

Our 1991 RCA P52150CP rear projection TV has gradually been getting bright cloudy blue, slight haze around letters & shapes-(especially blue channel change headings) when first turned on and then it...


Hi

First check whether all the cables from your dishnetwork are fine and connected firmly.If yes then you'll need to pull off the front of the tv, behind the speaker grill there would be a panel. Remove the panel and check for a black box hanging over there. It has 6 controls on it, 3 are marked as focus and 3 as screen. You'll need to adjust the screen. If you turn these too high you can damage a tube. so we are doing real small adjustments. Turn the color off on the tv and adjust the red, blue & green controls up till you get a fine picture. Also adjust the focus until you get a clear picture.

And, if it doesn't resolve your issue then it is an intermittant blue picture tube, a bad blue driver transistor on the CRT board, a bad connection on the blue crt board, or a problem in the RGB coming from the video jungle IC. A set this age, most likely will run you about 300 to 500 bucks to have this problem fixed, unless it is the picture tube.

Please do accept this solution and revert for further assistance.

Thanks
Rylee

Jul 03, 2009 | RCA P52926 52" Rear Projection Television

1 Answer

My 50 "Magnavox rear projection has a vary faint picture


If its over 6 years old , sound like the tube are shot , bright/focus together = bad tubes
sorry

Jun 30, 2009 | Philips Magnavox 50ML8105D 50" HDTV DLP TV

1 Answer

POOR PICTURE QUALITY


The convergance IC's need to be replaced along with possibly a pico fuse in the same circuit.Theres a large heat sink with two IC's starts with a STK number,replace them and that should take care of it.

Apr 29, 2009 | Projection Televisions

1 Answer

Green picture and distorted


Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.

The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded overs. To get fixed either call in a local TV repair company or goto sites such as Tv Repair Kits to get a repair kit with instructions. Here is there link.

http://www.tvrepairkits.com/xcart/home.php?partner=papa1dude

They have put together complete kits for most models that include the parts, step by step photo instructions, repair assistance, etc.

Mar 11, 2008 | Hitachi 42V710 42" Rear Projection HDTV

1 Answer

Shadows on Rear Projection TV


http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html
Sony Convergence
http://www.techlore.com/blog/entry/19694/Sony-Convergence-Repair-My-Sony-TV-has-a-distorted-picture-/
http://www.techlore.com/article/19631/Sony-Convergence-Procedure/

Jan 25, 2008 | Projection Televisions

1 Answer

3 curved lines top & bottom/blurred picture


This indicates a convergence problem..convergence power supply probally.. however ive seen 2 other cuicits cause this ..

Sep 24, 2007 | RCA HD52W59 HDTV Projection Television

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