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Posted on Oct 14, 2009
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Panasonic pt-47wxc43g the green will not

Panasonic pt-47wxc43g the green will not converge! Shows three shadows of green.

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John Snow

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  • Master 788 Answers
  • Posted on Oct 14, 2009
John Snow
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Joined: Apr 29, 2009
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Your symptom sounds like a damaged convergence IC.

You should be able to get a local service center to repair this at your house for between $350.00 - $450.00, If you want to repair this set yourself, I have some insturctions below that will be a help to you.
While it is not a very hard repair, this repair can be a bit tricky. If you have a 45W soldering iron, solder, solder wick, and heat sink compound you can repair it yourself.

When you remove the old IC's, please be sure to remove all of the old heat sink compound, as it can act as an insulation for the new IC's and cause them to overheat. I usually clean the heat sinks with alcohol and a small rag.

There are two and large IC’s that control the convergence in a big screen set. Some of the newer sets only have one. If you only have one, it is right in the middle of the set on the center circuit boardpanasonic pt-47wxc43g  the green will not - 2.gif. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).

Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.

If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.

I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.
asnowman

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I have a pt-47wxc43g panasonic projection tv and when i turn it on the red light blinks three times and it does not turn on.

Hi,
Three times red light blinking indicates problem of convergence output chips are bad, tv has 2 chips that need to be replaced.
Let me know if you are handy with electronics stuff repair and can replace/ solder parts in circuit board to provide you technical info OR local tv repairman will do this job for you.
Thanks.
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Hi,
It still convergence chip problem, check big resistors nearby these chips that would be open or devalued and causing problem, specially in green convergence area, your green tube/ gun is just fine and just not getting convergence output signal to show correct image.
I would suggest to download service manual copy of this tv for small fee from any website and fix the issue with schematics help.
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you need to go to your remote, look up menu. then select "convergence"...this will give you a "crosshairs pattern to align your "guns" ...it has three red, blue, and green.....try not to move the TV around too much....its knocking them out of alignment
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you can get the following repair kit at the following link. which contains the parts and the CD which has the instructions on how to do the repair. The kit you need is called the PT-53WX53G, PT-56WX53G, PT-
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Did you check the 2.2 ohm 2watt resistors? As often one or two will blow when the old ICs fail. The 3 blink error is indicating a problem with the convergence circuit still.
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Replace both the convergence ICs STK392-110 You can get new Convergence ICs at this link and they provide free installation instructions with pictures so you can do the repair yourself. heres the link.
http://servicemanuals.vstore.ca/
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What is the problem.Will the sevice menu work?
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You probably need to change out the semiconductors. The parts are STK392-110. There are two of them, one for horizontal and one for vertical. Search it online more.
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