Question about Panasonic PT-47WX42 47" Rear Projection Television

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I have a pannasonic pt-47wx42f and it has a problem were the bottem of the screen is wavey and color seperation i tried to do the convergence adjustment but it didn't work

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Your symptom sounds like a damaged convergence IC.

There are two and large IC’s that control the convergence in a big screen set. They are secured to a very large aluminum heat sinki have a pannasonic pt-47wx42f and it has a - 2.gif. 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).

What happens in the Panasonic2.gif set is that the convergence IC’s will short and cause the power supply to shut down from the overload of current. 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.

I would suggest that you contact a service center in your area for a complete diagnosis and repair, as this type of repair can get a little tricky. But if you want to repair the set yourself, just remember to be careful. The capacitors and CRT’s can hold a charge and may shock you.


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 I have helped you, please help me, and rate this suggestion the highest FixYa rating. (Two Thumbs Up)
Please Note: If you cannot rate this post with the highest rating, then please do not leave any rating. I am doing this for free and I do not think that any rating other that the best is needed.
If you need further assistance please comment to this post and I will try to help you further.

Posted on Sep 27, 2009

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1 Answer

I have a Panasonic PT-47WX42F with what looks like double vision or color bleeding. How can I fix it?


replace the two convergence chips which are stk=392-110's

Do you know how to solder?

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This is a 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 charge between $200-$300

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RED ARCH ON LEFT BOTTOM CORNER


This is a very common failure on Projection TV sets.
  • 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.
You can see some example photos and find a solution here...
http://www.fixya.com/support/r2861627-updated_convergence_problems_amp

Jul 16, 2009 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

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I just replaced the 2 convergance chips, but it did not seem to fix the problem. I then tested all the resistors that feed the convergence chips anf there was a 2.2 ohm fusable blown. IT was R7050 on mine. That seemed to fix it so that I could adjust all the colors through the convergence 2 screen. There seems to be a slight bow near the bottom when you look at the c2 screen, but not noticable when you are watching a picture. Since I got this broken, I am not sure how perfect it should be.

If anyone can send me the service manual, I would appretiate it. Thanks.

Oct 10, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

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You will need to replace both convergence ICs they are STK392-110 you can get replacement ICs at the following link and they provide free instalation instructions with pictures so you can do the repair yourself in about an hour.
http://servicemanuals.vstore.ca/

Jun 17, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

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Convergence ICs are bad and posibably th eresistors that power them. Its an easy fix if you can solder

Feb 29, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

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the convergence ic's are at fault need replacing,call a service shop and ask for estimate to repair .should be under $ 300.

Dec 09, 2007 | Panasonic PT-47WX42 47" Rear Projection...

2 Answers

Panasonic 47wx42f projection


Joe,
It sounds like your may need to replaced your convergence ic's loc# ic7001 and ic7002 stk392-110. That should take care of your alignment problem.

Dec 03, 2007 | Panasonic PT-53WX42 53" Rear Projection...

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Changing the convergence amp IC's is usually the first step..
Then let us know.............T.

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