Question about Panasonic PT-51SX30 51" Rear Projection Television

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Convergence is is off

The screen looks good in the center but the sides are out of con vergnce. looks like the sides of the screen bend up.

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  • willj94 Jan 22, 2009

    thanks for the help.. goin to look at it now and see what i can do

  • willj94 Feb 11, 2009

    I am still having the same problem after replacing ic's, what else could it be.

  • willj94 Feb 11, 2009

    all electronic seem fine.. the picture still bends in at top and bottom. Will a manual covergence fix this problem? I tried to order a service manual to show how to get it all ajusted and got screwed out of money, the only sent the cover page and not the whole manual. Can anyone explain how to do the manual convergence and do i really need the service manual?



    thanks a ton for the help....Im getting more determined to fix this thing than ever just to prove I can..

  • willj94 Feb 11, 2009

    I got the icu for $20 apiece from local store that i trust. Im goin to order the service manual tonight and will look for anything I may have missed. I will let you all what happends



    thanks so much for the input

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Your TV has gone crazy on you because your convergence IC's have gone bad.   These IC's operate at a very high temp, and usually only last 4-5 years.  
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months.. 
You will also need some "Heat transfer paste" - you can pick this up at radio shack.   Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go. If you need to order a resistor or two, 
http://servicemanuals.vstore.ca/index.php/cName/convergence-resistors   If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!   If this STILL doesnt make it look right, you will need to find out how to get into service mode and do a coarse convergence adjustment. This information can be found in the Service manual for your set. If you dont have one you can download it at manualuniverse.com
Hope that helps!

Posted on Jan 21, 2009

  • Josh Crager
    Josh Crager Feb 11, 2009

    Did you check the large resistors near the STK IC's to make sure they are within spec? Also, once you replace the STK's you will need to do a manual convergence to get everything lined up.

  • Josh Crager
    Josh Crager Feb 11, 2009

    if the picture is still bowed, you may also have a blown surface mounted fuse that powers the IC's - If you have a service manual for the set, (and for a manual conv you WILL need one ) look for fuses, also on the board the fuses may be labeled with a F prefix, like F432 - just as a resistor may be R432 and a capacitor is labeled as C432 - of course these are just examples. Also make sure you did not make any solder bridges between terminals of the new IC's, and finally....If you got those IC's off of ebay for a really good deal - its because they are fakes, and are probably no good anyways - ALWAYS use genuine SANYOS!!! hope you get it working!

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