Question about Panasonic PT-53WX53 53" Rear Projection HDTV-Ready Television

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My pt53wx53g screen just went black I unpluged it and pluged it back in. It is flashing 3 times and pausing on the power on light and then repeating

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  • Jeff Fortie Nov 15, 2009

    would you please send me your step by step repair for my Panasonic PT-53WX53 and also where is this best place to get the chips I need Thank you

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  • Panasonic Master
  • 14,553 Answers

Three blinks is short protection----95% of the time in this set it means one of the two STK-392-110 convergence chips is shorted.

If you unplug the set and remove the back cover:

Look inside for the two chips: black in color--2 1/2 inches wide X 1 1/2 inches tall with the STK printed on them in white.

The will be on metal heat sinks with fins side by side.
What you are looking for is there are about 10 or 12 light blue resistors around them---most are marked 2.2 ohms---if you find even one of them discolored or somewhat white in the middle----YOU have found and confirmed your problem.

Parts cost if you can do it yourself is under 30 dollars--if you or someone you know can do it you can save the set and a lot of money--most shops get 300 or more for this type of repair.

I can also tell you the best place to buy the chips.

I HAVE START TO FINISH, STEP BY STEP INSTRUCTIONS FOR THIS REPAIR IN THIS SET; IF YOU WANT THEM I CAN POST THEM HERE.

Repair involves getting at the chips and being able to unsolder them--the instructions are my own and tell you everything you will need to do the repair.

I have repaired hundreds of these sets with this problem.

If this information has helped rate this solution as I do this here for FREE.

SD TECH

Posted on Nov 15, 2009

Testimonial: "Thank you! this helped a lot and I would love it if you would tell me the best place to find the parts I will need and send me your step by step instr"

  • SD Tech
    SD Tech Nov 15, 2009

    I will post this first and then the instructions here.

    On Ebay, select search, then advanced search, then search by seller: sewsales55 this is a company I buy from called Suburban Electronics in Maryland---they will also have some of the other items in the instructions that you will need.

    I am posting this now and in a minute I will post the instructions.
    SD TECH

  • SD Tech
    SD Tech Nov 15, 2009







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    PANASONIC CONVERGENCE IC REPLACEMENT:


    What you will need;


    Two new STK-392-110 convergence Ic’s


    Solder


    Liquid solder flux


    Desoldering braid or wick


    A good soldering Iron


    Some denatured alcohol


    A small toothbrush


    A Philips screwdriver or screw gun to REMOVE SCREWS


    A PAIR OF GLOVES



    1. UNPLUG
      TV SET.

    2. Remove
      back cover of TV set.

    3. Remove
      entire front speaker grill on set(it pulls off and may resist being
      removed)

    4. Locate
      and unplug speaker wires (they are plugged into the main circuit board).

    5. Locate
      three cables with wires that come from the Front keyboard—two of them have
      to be unplugged from the main board(all plugs are different sizes but note
      where they go)

    6. Remove
      2 long philips silver machine bolts from the front of the set (behind the
      grill).

    7. Remove
      4 more in the back of the set; two
      are located at the extreme back edge of the plastic frame and hold the
      chassis down; two more are located on either side and also go straight
      down; note which are which and set them aside.

    8. Using
      gloves pull the entire metal box (it is called a light box) out of the
      set; there are hand holds on either side—careful as the metal has sharp
      edges.

    9. Remove
      the box from the set and locate the two Convergence IC chips; they are
      located on identical metal heat sinks with fins and they should have the
      STK-392-110 number clearly printed on them in white (they are black)

    10. Turn
      the light box over on its side and UNSOLDER ALL 18 PINS ON EACH IC. It is
      a good idea to apply liquid solder flux to the pins on both chips now. I recommend using a de-soldering braid
      for this—get all the pins completely de-soldered.

    11. Inspect
      the dozen or so light blue resistors in front of them; most are marked 2.2
      ohms—if any are white in the middle you will need to replace them at the
      same time; best way is to check all of them like checking a fuse----they
      protect the set if one of the STK’s shorts in any way.

    12. With
      the STK’s completely unsoldered turn the box upright and remove the two
      screws on each IC. If the chips
      have never been replaced you will need to tap them loose with a putty
      knife or flat bladed screwdriver.

    13. Remove
      both IC’s.

    14. Apply
      heat sink grease to the two new IC’s and install them one at a time; this
      part can take some time and it is important the pins on the new IC’s are
      perfectly straight---once you get them in, Hand tighten both the screws on
      each IC---do not use a screw gun—you can strip the screw holes out. Clean the bottom of the circuit board
      where the chips were soldered with some denatured alcohol and apply liquid
      solder flux to all the pins.

    15. Presuming
      you have already found/replaced any bad resistors turn the box back over
      and solder carefully both of the two new IC’s in, --do not short any of
      the pins to each other when you do this and when you are done it is a good
      idea to take a close look at both to make sure all pins are soldered and
      not touching each other with soldering you have just done. I suggest you
      do clean the pins on the bottom of the circuit board again with denatured alcohol.

    16. Slide
      entire light box back into the cabinet.

    17. Reconnect
      the plugs you removed when you removed the box. At this point take a lens
      cloth or a paper towel with glass cleaner sprayed on it and clean the
      three large black lens-if they are dusty the picture will be darker and not
      as clear as is should.

    18. Position
      the box so it is all the way in place and none of the wires or plugs are
      pinched.

    19. I
      usually at this point turn the set on before I replace the Six bolts that
      hold it in—2 from the front and the four in back----this way if you have a
      problem you can remove the box faster.

    20. If the
      set comes on and now has normal Convergence go into the customer menu and
      adjust the convergence in the multi-point mode----CAREFUL! THE FIRST
      OPTION this set usually offers is a
      green cross in the middle of the screen—do not adjust Green!

    21. Once
      you have the Red and Blue in the center adjusted find the second
      convergence mode---it will give you 8 or nine points on the screen with
      instructions on how to change from blue to red---use the original remote
      with the thumb wheel or cursor buttons to adjust.

    22. NOTE:
      SOME of these sets need to have the Convergence adjusted in first:
      full/4:3 and second in the other two zoom/wide zoom and third on the HD
      input with a HD signal coming in.
      There is also an option at this point to go into the Technical menu
      and fine adjust the convergence all over the screen—if you need this I can
      give you instructions based on the model you have—most of the time
      adjusting the set in the customer mode will produce a good result.

    23. I know
      all this may seem complicated to you, but this repair should take about an
      hour or so and just take your time when you get to adjusting the set.

    24. If all
      looks good turn the set off and Unplug it; install all 6 of the chassis
      bolts back; replace the back cover and the Speaker grill and plug the set
      back in.

    25. You
      may find it useful to go over the convergence Adjust again—to get all the
      points as good as you can. There is
      a hidden Tech menu that will allow a finer adjustment of the entire
      screen----it is somewhat difficult to access and there are a lot of
      buttons on the remote that then do different things.

    26. Most
      of the time adjusting in the customer menu will give you a very acceptable
      picture.




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