Question about Panasonic PT-47WX49 47" Rear Projection Television

2 Answers

Convergence problems convrgence lines horizontal and vertical. the line will be on the mark on the bottom. try to put it on the mark at the top then it will be off on the bottom. same thing side to side

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  • kent ggg Mar 06, 2009

    hmm. dont know much about tvs. how much do you think to fix it? i just got this tv today for $150

  • kent ggg Mar 07, 2009

    thanks, helps a lot. at least i know what to expect if and when i get it fixed. one more quick question. im new to these rear projection tvs. im wondering if putting my powered subwoofer behind the tv will affect the tv at all?

  • kent ggg Mar 10, 2009

    thanks, i didnt think about magnetic waves at all. i was more thinking about the vibration. roughly how far away should i have it away from the back of the tv?..ine question keeps leading to another.

  • kent ggg Mar 10, 2009

    also would that be affecting the convergence at all??

  • kent ggg Mar 10, 2009

    does that mean sub on either side of the you know what kind of ic's i will need

  • kent ggg Mar 10, 2009

    are ic's and semi conductors the same thing...when ever i look on ic's. it gives me semiconductors

  • kent ggg Mar 10, 2009

    Panasonic Part Number: C5AA00000203....found this...may it be the right one

  • kent ggg Mar 12, 2009

    got a prob...cant get out of the service menu

  • kent ggg Mar 13, 2009

    i was trying to get out of the service menu when my screen just blanked out, have a bowed streaky snow storm goin about 10 inches down my screen. do you know what may have happened???

  • kent ggg Mar 13, 2009

    could the ic be replaced by me, or would i need a technician

  • kent ggg Mar 13, 2009

    what is the stk # for the ic/ic's, does it have to be from a panasonic tv or any brand? i am trying to track one down on ebay right now


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The convergence IC's will need to be replaced and all resistors on them checked for thier values for possible replacement as well

Posted on Mar 06, 2009

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  • jason Mar 06, 2009

    if you call a qualified electronics repair shop the cost will be aproximately $350 to $400 or more , depending on shop and location

    the IC's are not exspensive ( aprox. $60) , its the labor

  • jason Mar 10, 2009

    if the magnetic wave from the subwoofer magnet is close enough or the sub is close enough , then yes this will definately effect the tv.

  • jason Mar 10, 2009

    the "CRT" "Cathode Ray Tube" gets effected by strong magnetic waves

  • jason Mar 10, 2009

    yes this magnetic wave can and will effect the crt's , you also have to worry about adjusting the convergence to earth's magnetic field , you can see that here

    depending on the strength of the subwoofer and its amp , it should be at least a few feet or so

  • jason Mar 10, 2009

    how many watts on the subwoofer amp ? and what size speaker ?

  • jason Mar 10, 2009

    this is an ideal setup for the sub

    Left speaker center right speaker


    +++(sub) <----> <----> or subwoofer


    Left surround right surround

  • jason Mar 10, 2009

    sorry the tv was supposed to be in the middle

  • jason Mar 10, 2009

    IC or "Integrated circuits" is the make up of the "CHIP" and they(Your STK392-110 convergence IC's are semiconductors , but your upgrade should be the STK392-180

    here is the STK392-110

  • jason Mar 10, 2009
  • jason Mar 10, 2009

    also, yes that part number will work

  • jason Mar 12, 2009


    1. power button

    2. unplug from wall(AC)

    3. power button and action button(same time) on tv for at least 2 seconds

  • jason Mar 13, 2009

    convergence IC is out now

  • jason Mar 13, 2009

    if you have never soldered or don't know how to get old solder off and check resistor values that are inline with the IC's with a meter , then you will want a tech. to do the repair to make sure that there is not a resistor or other component that is the cause of the STK IC breakdown

  • jason Mar 13, 2009


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  • Panasonic Master
  • 3,459 Answers

Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
convergence problems - 701cb04.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.
Solution #1

You need to replace the convergence chips and convergence resistors. Check the site They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs convergence problems - 578ba6c.jpghanged.


2c07611.pngSolution #2

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from that includes replacement coolant, photos. instructions, etc.

Posted on Mar 26, 2009

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1 Answer

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Does not sound like the chips are bad.
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To clean the INSIDE of the screen, you really have to disassemble the TV. Remove all the screws that hold the "back" ( the piece with the mirror) to the front (screen) assembly.
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Or send to

good luck
please mark the post with a fixya

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