Question about Panasonic PT-65WX51 65" Rear Projection Television

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Resistors capacitors thanks for your replys im not doing this repair myself its just that theres a fair few capacitors resistors around the heatsinks im told there should only be 4 thats why i asked thank you

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Do you have the schematic? your being told things that are unkown until you have the schematic in hand to confirm. call someone that is a tech!

Posted on May 11, 2008

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The television picture just went out in the middle of watching it. The audio is still working.


I would be concerned about the convergence board. I have repaired a few of these and by now you have several bad grounds in the convergence board.The convergence IC has separated its pins from the board. I can not say enough about bad grounds here. They are too numerous to even begin. One will have to pull this board very carefully, this is no easy task. Examine it very, very close. You will find several bad grounds, power resistors, diodes. the IC itself, jumpers, and jumper jacks that connect the boards, transistors, capacitor grounds, any other IC that is attached to heatsinks etc. The other board will be the power supply board and it will have many bad grounds here as well. The vertical IC can be a culprit, as the pins on here have separated as well. Once again look for bad solder grounds on the flyback. horizontal transformer, transistors,diodes and the like. Always inspect the pins on ICs attached to heatsinks. I know this sounds like a lot of work and it is. But with patience it may be done. You soon learn why they charge a lot for repairs. Thanks for asking and show a few hands of support!

Mar 12, 2011 | Mitsubishi WS-48315 48" Rear Projection...

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The screen bows inward from top and bottom with a multicolor blurring around the edges it does this more often than not as of late. On top of this issue, white squiggle lines run horizontally on the screen...


hello,the convergance ic are the problem 2 large chips the sit a metal frame called heatsink usually located behind the tuner, also in front of the ic are some resistors these need to be tested and the capacitors at either end will need to be tested as well if you get an engineer to do it may cost about £300 to 450 pound if can do your self it could about 40 to 80 pound. you will need a good multimeter and good desoldering and soldering skill. hope you can get it fixed.

regards
shaun

Nov 29, 2010 | Projection Televisions

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Picture looks like a double screen


You have a convergence board that is bad. The board you will be looking for has your RCA jacks and RF connectors. If you can remove this board,,there are two large ICs connected to a pair of large aluminum heatsinks. Remove the straps on the ICs. They should be STK 392-110. Replace these, and be sure to use heatsink grease between the ICs and the heatsinks. This will help keep the ICs cool. Also the low ohm, one watt resistors should also be replaced. These are located at R 3069,R3070, R3071, R3072, R3073, R3074, R3075,R3076, R3077, R3078, R3079, and R3080. All of these resistors are 6.8 ohms at 1watt. Thats fine if you think you can repair this. Now, before you start let me give you the best advice ever. Call Union Electronics at 1 800 648 6657 and aske for a refurbished convergence board. The price is reasonable and you get an exchange fee for you old board. The repair in this manner is very, very successful. And is done right the first time. You will be glad you did. Have the model# of your TV when calling. Thanks for asking and show a few hands of support!

Nov 12, 2010 | Philips 50P8341 50" Rear Projection...

1 Answer

Toshiba 65H82 Projection TV; location of Convergence resistors


The caps will bleed off within a few minutes of being unplugged. I don't know which caps and resistors he was telling you about but here goes.
Typically along with the convergence IC's the output resistors under the heat sink are at least checked with a multimeter. They are large resistors and should match their color code markings. The caps are probably the caps in the hyper module (hyper board)
Here is a very good tutorial to do this repair or get it done: http://www.dshosu.com/how-to-fix-toshiba-rear-projection-hdtv-wavy-lines/

May 25, 2009 | Toshiba 65H82 65" Rear Projection...

2 Answers

Convergance Module


Click HERE for a detailed explanation of how to discharge a capacitor.
Also, the convergence modules will be located on the heat sinks on the main board. Here is a pic of the modules on the heatsink:
49d51bb.jpg

But once again , be VERY careful there is enough charge in a tv capacitor to kill you and will probably kill the capacitor (if it has a high enough capacity) due to the extremely high current flowing through it if you do that. The normal procedure is to connect both lead with an appropriate resistance. And not only once, because large capacitors can spontaneously rebuild some residual charge after being discharged (still enough to give you a serious shock). Normally both leads are connected through a fixed capacitor discharge bridge, which stays on the leads while working on the system. Once ready for testing, the bridges are removed.

I would still recommend getting a TV technician to repair this.

May 29, 2008 | Mitsubishi WS-55805 55" Rear Projection...

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TV wont turn on


Go to this site they have the service manual which they email you after purchase and that entitles you to free tech support and they have a repair tech that can do the repair in his sleep he will actually send you step by step instructions with pictures on doing the repair which only cost a few dollars in capacitors

Apr 27, 2008 | Mitsubishi WS-55513 55" Rear Projection...

1 Answer

Resistors on toshiba 50h72


The resistors are located right next to teconvergence ICs.An ohms meter will check them often you have to lift one leg out of circuit to test as they have to be within 5% tolerance. You cant miss the resistors right next to the ICs heatsink their should be quite a few of them all identical.

Feb 08, 2008 | Toshiba 50H72 50" Rear Projection...

2 Answers

Line paring


I have the same problem that I have been trying to solve. I talk to a service guy who said the problem is in the deflection circuit. While doing some troubleshooting I wiggled a 220 uF capacitor and they when away. Solder joints were OK so I am going to replace cap, to see if the maybe the lead is broken inside. Be careful if you decide to "wiggle" components because this particular TV has a live chassis, so things like heat sinks will have current running through them. Anyway, as soon as I do the repair I'll let you know if it worked

Jan 26, 2008 | Hitachi 51F59 51" HDTV Projection...

1 Answer

Convergence?


From what i see in these posts most say its the IC ship to replace i will get one for my 46807 also but dont know where yet .
also i seen that if that dont fix it then there is a few resistor's to resolder someplace dont know where either..but i can make the repairs myself im handy CROSS fingers ..:)

Nov 24, 2007 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

ProScan 52" Projection Turns on the right off after clicking a few times


I've had the same problem with a 60" proscan. The tech repaired it ($400 for the repair) and left a note inside the chasis explaining what he did (in case he had to fix it again). He replaced a resistor and re-soldered a number of ICs. It happened to me again, and I may attempt the repair myself this time around.

Mar 19, 2007 | Proscan PS52800 52" Rear Projection...

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