Question about Hitachi 57TWX20B 57" Rear Projection Television

2 Answers

Convergence issue, green line grid out of square

Is there any adjustment inside the TV on a circuit board to align the green grid?

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  • chata31 Nov 15, 2007

    double picture on screen. letters have a double shadow.

  • mdhook Feb 03, 2008

    I have the same problem just the red line grid is out of whack can't seem to adjust .
    what could be the problem

  • Anonymous Mar 27, 2014

    red convergence lines on grid are split into two lines and green front panel light is flashing

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Adjustments may be needed after convergence IC's are
replaced. It is step-by-step, according to service literature or
skilled technician's experience ..........................T.

Posted on Nov 16, 2007

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Most likely you have bad connections on green stk solder the connections or replace the stk check all fuses too

Posted on Nov 15, 2007

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  • marco amezcua
    marco amezcua Nov 16, 2007

    what else do you need to fix this problem let me know if you need more help ok and no if you have this problem all you have to do is replace the stk no adjustment necessary just follow the direction i gave you and you will fix the set

  • marco amezcua
    marco amezcua Nov 18, 2007

    THE ONLY ADJUSTMENT NEED TO MAKE IS IN THE USER MENU TO ALIGN THE CROSS OTHER THAN THAT 99.9% OF THE TIME ALL YOU NEED TO DO IS REPLACE THE STKS

  • marco amezcua
    marco amezcua Nov 18, 2007

    I MEANT SOLDER THE STKS

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1 Answer

The colours are no longer lining up. On captions you can see the three seperate colours. The auto focus does not fix. How do you enter service mode to adjust grid lines?


U can't do any grid lines adjustments for this problems,the tv problems it is having are known as a convergence pictures problems,it is dead.The tv have any colors lines like R,G,B mis alignments,tv have any colors shadows pictures or have a 3D pictures look alike?Yes,than the tv convergence board it is dead for the tv to causes all of these convergence pictures problems.The tv convergence board must have to be repair like replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence pictures problems.The tvs shops will cost like $300-350 for parts and labors.

Sep 21, 2011 | Toshiba 57H83 TV

1 Answer

My RCA P52937SG projection tv. Picture distorted. I beleive it has to do with the green circuit / projector. Everything needs to be aligned to green. Green projector is on, but, in alignment screen I get...


The tv have a problems known as a convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadow pictures or 3D pictures look alike?The tv convergence board is dead.The tv convergence board must have replace the 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

Mar 28, 2011 | RCA R52WH73 Projection Television

1 Answer

When i try to adjust the convergence, the red and blue adjust ok, i assume the green in the basline color, but it turns up on the right side of the screen and the picture has a green wave in the lower left...


The tv 100% have convergence problems,it dead,if have any colors lines mis alignment or don't stay in the convergence - + grid.The tv convergence board is dead.The 2 STK convergence ICS and some or all is resitors are dead.Must replaced these parts on the tv convergence board to solved the tv picture convergence problems.The shop,will cost u like $300-350 for parts and labors.

Dec 11, 2010 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Red color convergence issue; Red lines are curved


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 $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Nov 24, 2009 | Televison & Video

1 Answer

Rear projection convergence issues


Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3-D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Example Photo:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

You can see more examples and find a fix here...

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

Apr 24, 2009 | Sony KP-53V80 53" Rear Projection...

2 Answers

RED Convergence Alignment issue


Replace both STK392-110 Convergence IC's with Toshiba or Sanyo quality................No cheap IC's !!!......................T.

Aug 16, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

CONVERGENCE PROBLEM IN TOSHIBA 43H70


Replace both STK392-110 convergence IC's with Toshiba or Sanyo brand........no cheap junk IC's !!!.................T.

Aug 16, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Hitachi 53uwx10b Convergence


The grid (called an overlay) is put in place to fine-tune one of the colors, usually green. Once one color is adjusted perfectly, the other 2 colors are adjusted to match the first color. For example, if the convergence data is completely erased, the tech will set up the overlay and align the green using to the overlay, and then align the red to the green and then the blue to the green. If the alignment is being done after replacing the convergence IC's because one or 2 colors are slightly off in the corners, the green is usually very close to perfect and the use of the overlay is not absolutely necessary. It is pretty easy to align one color using the outer edges of the screen itself. If you do need the overlay it can be purchased from any Hitachi parts distributor such as Herman Panson, Fox or Union Electronics.

Mar 31, 2008 | Televison & Video

1 Answer

More Convergence Issues


They are definitely a part of the convergence circuits. A variable resistor increases resistance as they warm up. So excessive heat destroys their capacity to perform as was designed and you will continue to have issues until all components are within 5% tolerance levels. Hope this helps. let me know if you need anything more for information.

Feb 03, 2008 | Samsung HCL4715W 47" Rear Projection...

2 Answers

Warped Picture, Separated colors


Each color (red,green & blue) has an amplifier IC (STK-).
When there is a convergence issue,the first step is change both
IC's for reliability. Then check for open fuses devices,usually
pico fuses.Then re-check convergence alignment.......T.

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