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

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Panasonic IC's Slinte. You had mentioned the resistors that power the IC's may be bad as well... do I need to purchase these also? Or should I first fix the IC's?  Is there any way to tell? Omar

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  • Panasonic Master
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Usually you can see the resistors being a little discolored as they dont have color bands on them. If you dont notice any discoloration on those resistor you should be good to go. There are about 7 or 8 resistors right next to the ics they stand up off the boards easy to spot, just look them over real good.if you notice any discoloration let me know the code stamped on the resistor and I will give you the ratings of the resistors.

Posted on Mar 01, 2008

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PT-47WX52F with bad resistors at R832, R7060, and R7066. Changed IC's before, but now these resistors are bad. What type of resistors are these, and how can I obtain them? Thanks


R832 is a 8.2MEG 5% 3/4 watt resistor
R7060 & R7066 are both .27 ohm 5% 1watt resistors,
You can get the full set of panasonic resistors from www.tvrepairworld.com under the Panasonic repair kits its listed as the PT47WXC43 Resistor Kit that kit also fits the WX52 and WX42 models panasonics.

Aug 11, 2011 | Panasonic PT-47WX53 47" Rear Projection...

2 Answers

My 56" Panasonic crt tv turns on for a second then goes black


Need to know how many times the LED is blinking to assist you.

Oct 06, 2009 | Panasonic PT-53WX42 53" Rear Projection...

1 Answer

Panasonic PT53WX42 dead with 5 blnks of power LED


Your symptom sounds like a damaged convergence IC.

This is a common failure for this particular television. The power light might be blinking indicate a short in the power supply

There are two and large IC’s that control the convergence in a big screen set. Some of the newer sets only have one. 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

Oct 05, 2009 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

I have a panasonic model#PT-56WX33,when I power on tv NO PICTURE,NO SOUND,nothing.Only the red power light on tv panel lights up and blinks 5 times ovr-n-ovr.


Your symptoms sounds like a damaged convergence IC.

This is a common failure for this particular television. You should have a red blinking power light on the front of your set that will blink 5 times and this is your solution to your problem.

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 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).

What happens in the Panasonic 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.

Sep 30, 2009 | Panasonic PT-56WX53 53" Rear Projection...

2 Answers

Where can we get the best IC Replacement


always stick with the manufacturers brand ! but you will need to check the resistors on the IC lines to make sure thier values are not off , because that will cause the IC to go again no matter what brand IC you use. other components in line of the IC should also be checked for bad values as they can also cause malfunction and breakdown of an IC and its circuit components

Dec 30, 2008 | Panasonic PT-53TW53 53" Rear Projection...

1 Answer

Detailed problem per your response


The problem is that the ICs may have been blown because the resistors were bad. Just as a double check before you replace anything else. Please confirm that the STKs are STK392-110. Also, replaceing them with STK392-150 is a valid upgrade, I'm not sure about the 180s, but I'll check. Both the STKs and the resistors need to be changed at the same time.

The hour glass view you reported: Was the bowing on the top and bottom or on the sides?

Thanks,
Dan

Sep 11, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Continued convergance issue.


I have heard from a few people that the higher value IC (150, 180, etc) do handle more current, but also that they *draw* more current, as well. Taking a guess, it may be simply that the 180s you installed were pulling too much juice from the resistors, which is why they popped. These ICs were used in many TVs, so it may be that the Panasonic doesn't have as much tolerance for the 180s' power requirements as, say a Hitachi.

Luckily, resistors are pretty cheap, so it's probably worth the few bucks to replace the resistors when you drop in the 110s you have in hand.

Sep 09, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Mitsubishi WS 48511 Blinking Green Power Light


Your model will have two picos mounted on the same board with the 7 capacitors they will look like resistors without the color bands they will be F9B01 and F9B00 check them for continuity.

Jul 27, 2008 | Mitsubishi WS48511 48" Rear Projection...

2 Answers

Convergence if distorted


Distorted is the classic sign of bad Convergence ICs and possibly the resistors that power them. Check the resistors right next to the ICs and replace both conversion ICs.

Mar 02, 2008 | Panasonic PT-47WX49 47" Rear Projection...

2 Answers

CONVERGENCE ic CHIP


if you can remove the rear panel assy. look for the convergence ic's they start with stk--- and you got the part number you need a source panasonic is 814 source and the number on the ic's stk 390 ----/

Aug 22, 2007 | Panasonic PT-53WX42 53" Rear Projection...

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