Question about Hitachi 43FWX20B 43" Rear Projection Television

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43FWX20B. Convergence problem.

Like so many others have had, there is a convergence px with my Hitachi 43FWX20B. I can't get the motherboard that contains the IC chips and resistors out. I especially can't figure out how to release the 4 red wires in the front. The smaller wire pulled out (though it was very tight), but the 3 larger wires are very tight and do not appear to be a simple pull off. I'm afraid that pulling will break the wires off inside the black (?) housing. Even besides these wires, I have removed 4 screws and unlatched all the jumers and snap tabs, but there still seems tobe resistance when I try to pull loose. Is there something in the rear besides a single screw that I cannot see? Do the small black tabs in the rear do anything except guide the board into place.

Thanks,

Elecnubie

Posted by on

  • dprows May 18, 2009

    Pilot210,



    Thanks for the info. I removed the screws holding in the plastic tray support, and when I pulled out the entire unit, I found a fifth screw in the middle of the motherboard. This release the entire motherboard. Also, pressing in and turning the red wires released them from the block, just as described.



    Many thanks,



    Elecnubie

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Look for hidden screws in the board... that's all I can say from experience. Plus, for the three red HV leads, Push down into the block and turn. This should release them if there is no other visible means of mechanical retention.

Posted on May 18, 2009

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I have a 43fwx20b the pic is blurry and has a bit of 3 D look the projection lights seem to be fine


Thats usually caused by failed convergence ICs and the associated resistors. You can get the convergence repair kit from www.tvrepairworld.com they have most model kits available.

Jun 04, 2011 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

Our hitachi 43fwx20b has double vision any ideas?


Yes, set uses two convergence chips, either STK-392-110 OR 120.

Both will need be replaced, I have photos and instructions if you tell me how much skill you have.

Let me know if I can help you, parts cost on EBAY under 20 dollars.

SD TECH

Oct 24, 2010 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

Colors "out of register"


The convergence ICs need replacement. You can get the convergence repair kit from www.tvrepairworld.com which also contains the CD with instructions.

Jul 20, 2010 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

Hitachi 43fwx20b. Blue color will not reset in auto or manual focus. If it is convergence what and where do I need to look to locate them in the set?


the convergence is an automatic adjustment. if the auto isn't working after you tell it too from user menu,then the convergence amp is not working. this requires a tech or a good hobbiest. most of these amps are just ( stk's ) chips 3 in the unit you should replace all 3 making sire there is enough heatsink compound on them.

Jun 21, 2010 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

Tv has a 3d look what can be done to fix it hitachi 43fwx20b


The convergence board is bad. Replace the STK voltage regulators and any associated discolored resistors.

Mar 13, 2010 | Hitachi 43FWX20B 43" Rear Projection...

2 Answers

Hitachi 43fwx20b Convergence Problems


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

Feb 25, 2010 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

Hitachi 43fwx20b magic focus the 3 colors are not adjust.


First have the convergence IC's replaced these are the two large black IC's mounted on an metal heat sink.

Oct 24, 2009 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

I'm pretty sure the convergance chip is out. My problem is that I do not have the original remote. I have one made by Dynatron. I can't figure out which button is equilivant to Status, or ANT. Help please.


Almost any remote will work for this set if it is Hitachi--understand----if you have one of the two STK-392-120 CHIPS THAT THIS MODEL USES BAD--It will not adjust....

All of the Hitachi remotes will work but different ones use different buttons in the convergence mode--if the model is 43fwx20b it uses a Hitachi remote with the number CLU-4321UG... printed on the front of it.

If you get a different Hitachi remote let me know--I have a book from Hitachi that shows most of the remotes by number and photo and shows which buttons do what in convergence.

Let me know if you need to know how to replace the chips-----usually you can get a remote for this type of set pretty cheap on Ebay.....

Regards, SD TECH

Oct 15, 2009 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

Red color is not aligned


Try adjusting the convergence. If it won't move see below

This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400

Oct 02, 2009 | Hitachi 43FWX20B 43" Rear Projection...

1 Answer

Horizontal hour glass picture


The convergence Ics need replaced. In Hitachi, resistors and sometimes a coil needs replaced as well. The convergence/deflection PCB is available, but, the cost of that board is higher than having a servicer come to your home and repair the unit to component level. If you are not familar with this circuit, then call a servicer. Have them replace both ICs not just one. Make sure they are repairing to component level and not replacing the board. Hope this helps.

Dec 16, 2006 | Hitachi 43FWX20B 43" Rear Projection...

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