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Panasonic PT-53TW53 53" Rear Projection HDTV-Ready Television - Page 6 Questions & Answers
SD tech , you said you could give me start to
I am not SD Tech, but I can help you with this problem.
The chips are located on the signal board which you have already located. To remove that board you need to remove all the screws from the board, just look around at the entire surface, there should be one in the middle and the rest are along the edges. You will need a short Philips for the front ones.
After you have removed the screws you will have to remove the back AV cover, just remove all the black screws from the back of the cover and unplug the tuner switch. The tuner switch just unplugs from the board and the tuner. If you have dual tuners just unplug the second one as well.
Then remove all of the electrical connectors off of the signal board, don’t worry too much as they are all different sizes and most of the time they have letters that correspond to the plug on the board. There are three small 4 wire plugs in the middle of the board towards the front of the set that are all the same. If you have different colored sharpie markers just mark one a different color as you unplug them. These are important because they control the convergence to each tube. If you don’t have different colored sharpies then just mark them with a black sharpie and mark them will lines, IE; one line on the first one and so one.
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. Apply the new heat sink compound with a toothpick or some similar device and spread it evenly across the chip before you install them into the board. Once they are installed then you can secure them with the screws and don’t worry about the excess compound the squeezes out of the back of the chip, it will be OK.
Once you have the new chips installed check on the resistors and replace any that are charred or open, you can test them with a DVM on the OHM setting for the resistance value marked on the resistor.
Check for two resistors on the front of the board toward the middle these are the power supply resistors for the convergence IC’s. If they are open or charred, replace them as well.
At this point you should be able to reinstall the board, hook up the wired connections and then fire up the set before you put the back on. This will tell you if the set is going to work or not. If the set works, just finish putting the back on and then set up the convergence. It will need some adjusting because the new IC’s will be a little different.
If the set does not power up, let me know and I will try to help you with some further trouble shooting tips.
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.
Thanks for using FixYa
asnowman
11/18/2009 2:29:59 AM •
Panasonic...
•
Answered
on Nov 18, 2009
Tv comes on with top left screen distorted after 2
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 instructions 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 board. 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.
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.
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.
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If you need further assistance please comment to this post and I will try to help you further.
Thanks for using FixYa
asnowman
11/16/2009 6:05:06 AM •
Panasonic...
•
Answered
on Nov 16, 2009
My TV screen went black and the red power light
Your symptom sounds like a damaged convergence IC. The three blinking lights indicate a short in the power supply to the convergence IC'sYou 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 board. 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 you pull the board out for the repair, make sure that you mark all wires, expecially the ones in the middle front that are all the same size with a differnt colored permanent marker. I use Red Green, and Blue, so that you can place them back into the same sockets.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.aspxAnd their phone number is a 24-Hour Order Desk: (800) 274-4666I 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
10/20/2009 6:11:13 AM •
Panasonic...
•
Answered
on Oct 20, 2009
PT-53TW53 53 in. Rear Projection has sound but no picture
It is. And I hope you some cash set aside for this extremely costly repair.
I once had a rear projection TV and was told by the repairman that each of the 3 flourescent lamps run about $200.00 to replace.
Needless to say I did not get it fixed
10/12/2009 2:38:37 PM •
Panasonic...
•
Answered
on Oct 12, 2009
Convergence blue stopped working. Unable to adjust
Your symptom sounds like a damaged convergence IC. They are on the Signal board on the left as you look from the back of the set.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.aspxAnd their phone number is a 24-Hour Order Desk: (800) 274-4666I 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.
9/29/2009 3:09:38 AM •
Panasonic...
•
Answered
on Sep 29, 2009
RCA 61w66 messed up
lost of power supply that power up your conv.
if you tack off the back of tv look at the left of tv you see a red wire come from the flyback
you see 3fuse by the flyback down at the base
of the flyback that is power for the conv,
it could be bad solder, try that to see if that
you fix. hope this worh for you.
9/9/2009 12:59:49 AM •
Panasonic...
•
Answered
on Sep 09, 2009
No picture.
Ur backlight IC inverter board is lose connections or it dead.Take it aparts and see,properally the dead board usally is.Tries this Website.Tv Repair World.com.Type in ur tv name & model parts number u can buy it and replace it.Or ask questions or intructions.
9/4/2009 9:33:08 PM •
Panasonic...
•
Answered
on Sep 04, 2009
Picture distorted, bowed in with shadows on text.
This is a very common problem with all
projection tv's
it is the stk392 ic's in your set have failed. You can attempt the
repair yourself as long as you understand the risks involved when
working inside a tv,
otherwise you can get it repaired by a pro and i would guesstimate it
will cost somwhere between 250 to 300 to fix. the ic's are located on a
big heatsink and the number stk392-xxx xxx If xxx is beteween the
numbers 110 and 180 you can use the stk392-180 for the repair, and i
would recomment doing this. if it is stk392-560 or another number
replace only with the same ic.
9/3/2009 12:10:54 AM •
Panasonic...
•
Answered
on Sep 03, 2009
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