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Ws 65819 starts ok but after a few minutes convergence is way off. Blue is 2 or 3 inches too high

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  • gary_r_burke Oct 07, 2009

    Thank you, this is very helpful. Yes, I am able to repair it myself, I would be grateful for the additional information you mentioned. -Gary

  • gary_r_burke Oct 19, 2009

    Fixed TV by replacing the 2 STK-392-570 convergence chips as advised by sdtech. It works fine now.
    But it is a challenging job. The chassis has to be pulled out and the center PWB extracted. This requires removal of the large heatsink and convergence daughter board cover. Desoldering and resoldering the new parts is the easy part. The hard part is re-assembling it all. I recommend getting the service manual as it is only $15, but it doesn't help that much. Also note you will need heat sink compound; it is available at radio-shack.
    -Gary

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  • Televison & ... Master
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Ok, I have repaired hundreds of these sets--this one uses two STK-392-570 convergence chips---I have seen many of them where in the first 30 minutes or so the chips are intermittent, I call it Flakey----you need to replace both chips---very common on this set.

The chips can be purchased on Ebay for less than 14 dollars plus shipping (for a pair)----the real question is are you able to do this repair if I provide you with detailed instructions for this model?

If you are able to do this you can save a lot of money--most shops are going to get 300-400 for this kind of repair----sooner or later if you keep using the set this way---it will go dead---there are fuses that protect the chips--when one goes the set will instantly shut off.

There is a very simple reason this happens--these two chips are about 2 1/2 inches wide and 1 1/2 inches tall with 18 pins each---the back of each chip is metal and a white grease is applied to each chip before it is mounted to a large metal heat sink--after some years the grease dries out and one of the chips goes because it cannot move the heat fast enough to stay cool.

Let me know what level of soldering skill you have--I have start to finish instructions I am willing to post here for you----if you remove the front speaker grill on the set and the inspection plate behind it you will see the two chips on the center circuit board on a large metal heat sink---

If you are not able to do this repair--I have lots of free advice about how to get it fixed---I have fixed hundreds of these sets---once the chips are replaced and the set adjusted---it will not have this problem again for 5-8 years----very good sets and much more dependable than LCD or Plasma sets.

IF YOU HAVE ANY QUESTIONS OR NEED HELP-do not hesitate to ask me here---I am here to help people.


Regards, SD TECH

Posted on Oct 07, 2009

Testimonial: "Very helpful information which is directly applicable to my problem. SD Tech is very knowledgeable."

  • 2 more comments 
  • SD Tech
    SD Tech Oct 08, 2009

    you want the information posted here? The rules here do not permit me to ask or Give my email--I will post them here-several pages--you will have to copy them from here.



  • SD Tech
    SD Tech Oct 19, 2009

    The instructions are a bit long so I am going to post them here in several parts--the site cannot handle the whole thing:







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    392-570 Replacement





    Mitsubishi convergence IC replacement: this applies to sets
    that use (2) STK-392-570





    The Idea here is to get the Middle Circuit board out so you
    can replace the Convergence Ic’s.








    HERE is what you will need: (most of this you can buy on the
    internet or at local electronics stores)





    Two new: STK-392-570 CONVERGENCE IC’S


    One good soldering iron


    Solder


    De soldering braid or wick


    Liquid flux


    Heat sink compound (grease)


    Denatured alcohol


    One short Philips screwdriver


    One small clean toothbrush


    One electric screw gun to REMOVE screws





    Turn the set on and examine the picture for how the
    Convergence looks bad---when you are done examine it again---once in a great
    while you will get and install a new IC that is bad. Remember this when you
    have finished—if the convergence is still bad but different from what you
    started with you may have installed a new I.C. that was bad. Turn the Set off.









    1. Unplug
      set.

    2. Remove
      back cover.

    3. Remove
      front speaker grill and inspection plate behind it.

    4. Remove
      the 2 or 3 black screws that go thru the back edge of the plastic frame
      that hold the chassis down.

    5. Where
      all the video and audio jacks are on the right edge of them you will see a
      diagonal plastic (Black) remove the two brass screws from the outside
      edge, remove another to the right bottom and a third smaller screw forward
      and to the left; remove plastic piece and all four screws and set them
      aside.

    6. Look
      carefully at main board in center of the set.

    7. You
      will find a number of screws hold it into the plastic frame.

    8. Towards
      the left back edge of this (to the right of the plastic you removed) you
      will find a metal cover with a small screw on either end. It has a lot of round holes punched in
      it.

    9. Remove
      both screws and pull the shield up and off---remove the board beneath it
      by releasing the two tabs on the bottom right side and pulling the board
      out—handle it with care as it is the digital convergence board that stores
      the set’s memory of adjustments.
      Set it aside

    10. At
      this point you need to pull the entire Chassis back at least a few
      inches---If it does not slide back look for a plastic latch on either side
      near the front of it. Some sets
      have the latches on the left or right side—black plastic tabs that lift
      up.


  • SD Tech
    SD Tech Oct 19, 2009

    IF ANYONE NEEDS THE COMPLETE INSTRUCTIONS LET ME KNOW--I HAVE JUST POSTED HERE THE FIRST PAGE TO GIVE YOU AN IDEA--Thanks Gary--glad to hear it turned out good---you are right--it is not the most easy set to do this with---but I have already got a lot of thanks from people who were able to do the repair!

    SD TECH

  • jdsullivan67 Jul 12, 2011

    Hello SD Tech,
    I could really use the full instructions for replacing these chips, how can I get a copy of them?

    Jim

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1 Answer

My Mitsubishi ws-65819 shows in an oval shape, can this be fixed, also is there a way i can do it myself to save some money? Also how to play an Xbox 360 in HD?


yes......you can rplace the convergence ic's on convergence module......these are the big stk type ic's and also the low ohm resistors.
These are 3.9 to 6.8 ohm half watt on the yoke return circuit. Let me know how you fare......regards. meder's tv

May 28, 2012 | Mitsubishi WS-65819 TV

1 Answer

Mitusbishi Model ws-65819 color convergence repair. How does one go about fixing it?


The two stk-392=570 chips need to both be replaced===they are along with the rest of the circuit on the middle board.

May 20, 2012 | Mitsubishi WS-65819 TV

1 Answer

I have a 65inch mitsubisihi and having convergence problems need help on instructions to put in stk-392-570 chips to fix the problem. WS-65819


Here is a youtube video I found that was quite helpful to repair my WS-65819 this weekend: http://www.youtube.com/watch?v=63TbxQaNkVo

There is a part 2 that deals specifically with the soldering of the chips. Hope this helps

Sep 26, 2011 | Mitsubishi WS-65819 TV

1 Answer

When my 65 inch Mitsubishi tv is on for about 10 minutes the colors get al blury and almost looks like 3D without the glasses.It is nine years old Model number WS-65819.It doesn't clear up


Your Convergence ICs are likely failing or it is a bad solder joint related to that area. It is very common on rear projections. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.


Note if one STK chip fails, you replace both regardless. There may only be one STK chip in this set. If there are two, they will be right next to each other.


Feb 20, 2011 | Mitsubishi WS-55819 55" Rear Projection...

2 Answers

My WS-65819 won't power on. It would power on for


need to replace the stk's and some other caps, usually have to resolder the chasis on both convergence and power supply chassis.

Dec 03, 2009 | Mitsubishi WS-65819 TV

2 Answers

Mitsubishi ws 65819


Ur power board ic converter it dead.
Ur Convergence board is bad going to die to.
Both must change.

Aug 15, 2009 | Mitsubishi WS-65819 TV

1 Answer

Can't aline the vertical red and blue on the left


The Convergence circuit has failed. It is recommended that a professional do the job.
The Convergence IC's need to be replaced.
It will be a STK393-110 or a pair of STK392-570's.
Hope this helps,
skyassoc

Jul 16, 2009 | Mitsubishi WS-65819 TV

1 Answer

Ws-65819 Upside blue arch extending from top of TV screen


Used your info to isolate and verify trouble with the upside blue arch. It was a convergence trouble. Then hired tech from your site recommendation to come out and fix today. He replaced both convergence chips and cleaned electronics. Works like new. Thanks for your help but you should allow customers a one time view-to-trouble search that I think would build a you a solid following. Folks would recognize your site as good source to search when trouble strikes and be more likely to subscribe. It gave me a good sounding benchmark but it could be enhanced. Thanks!

David Herrera

Jul 14, 2008 | Mitsubishi WS-65819 TV

3 Answers

Intermittent convergence issue became permanent


Hi Ed,

Your convergence amplifiers are definitely bad. The user manual will not work, since it is the same manual that comes with the set when it was new. The service manual can be found at:
http://servicemanuals.net/results.aspx?type=SM&brand=0&model=WS-65819

Best Regards,

MyTvGuy

P.S. Thanks in advance for rating me!

Feb 09, 2008 | Mitsubishi WS-65819 TV

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