Question about Hitachi 53FDX20B 53" Rear Projection Television

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Distorted pict. w/ wavy circles

I replaced the IC's in the tv and resitors 50, 54 and 58 as I had once about a year ago. Everything was ok but, there was a slight convergence issue on the left side of the screen. I tried to fix it ( stupid me). I was trying to adjust the the convergence manually and some how got stuck in Static mode. I fumbled around a bit trying to get out of it. I now have a green cross hatcht hat is severely distorted at both the top and bottom of the screen. Is there any way that i can rest the TV to the factory defaults? Any comments or suggestions. Please help anyone who can talk me through it, instructions etc...

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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

distorted pict. w/ wavy circles - bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Posted on May 30, 2010

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JVC AV-48WP30 convergence drifting after IC replacement


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. 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, Zenith, and others. You can get a convergenece repair kit wiith 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 - 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 a fix here
bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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1 Answer

Distorted picture


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.

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Red wavy red line on top of picture.faces distorted, but bottom part of picture ok


sounds like you have an output power supply going bad.

the tv is crt projection...which is to say due to its age and technology it will probably be cheaper to just get a new tv.

Sometimes these older style sets end up with compenent board solder breaks that can be spotted visually and fixed by a talented repairman.

My friend had this done to a similar 55 inch set he has about 3 years ago....he just won't give his up either!

good luck and be careful! There is lots of high voltage inside that tv!

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You could have a Power Supply Regulator Problem. Many times these sets will not hold Horizontal sync when there is excessive High Voltage or a problem with the High Voltage Regulation. This is not a problem you want to deal with yourself. I would recommend a Toshiba Repair Facility to come out and diagnose it.
Hope this helps,
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yes it sounds like the two STK392-560 Convergence ICs need to be replaced. You can get new ICs with free instructions at the following link.
http://servicemanuals.vstore.ca/

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1 Answer

Picture flickers in and out rapidly,gets blurry for about 5sec then looks like new for about 5sec then back again


Did you replaced 2 IC convergence as well or just 2 resitors 3.9 ohms ? if you did replaced 2 IC then you might have probelm in convergence drive it is1 of the PCB mount vertical on the left side from the rear view under part BP95-00415C you need to readjust the convergence by using your remote control just follow in the servive manual

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Stomper, there are at least 6 IC`s in your set, look on the bill and tell me which one(s) they changed. What is wrong with the set now that they have fixed the initial problem ? Once you answer these 2 questions I`ll have the info I need to give you a concrete answer.

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Convergence Problem inSamsung HC-P4752W 47" Rear Projection


One of the convergence output IC's has burned out and needs to be replaced. If the IC opens up inside then it stops working without blowing any fuses or resistors. The IC should be replaced and the set realigned by someone with experience in convergence circuits.

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