Panasonic PT-51DX80A convergence problem

My son reported that he turned on the set and it seemed to take longer than normal to fire up. When it did the green convergence had shifted maybe an inch and a half to the right (vertical lines). Red and blue looked normal. I'm a retired tech that's done major brand warranty on consumer electronics for 20+ years but not big screen tv. Just need a shove in the right direction here. I have no service manual yet so here's a couple questions for those who may have worked on this set with similar convergence issues:

  1. Where are the convergence electronics located? All on one module, or main board? I'd rather buy the whole deal if all three colors are located in one unit.

  1. Could it be something else? Maybe the green device? Are there any typical failures? Quite a bit of the things I repaired under warranty had the same failures hence my question regarding this.

Any advice from experience with this model will be greatly appreciated.

Reply to
Meat Plow
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Reply to
Art

You likely need to replace IC 7001, & IC 7002 convergence IC's STK392-110, & don't buy cheapy ones, as they may not last. Also, check the low value resistors right by both IC's. Make sure you clean off the old heat sink compound, & use a generous amount on the IC's. You will likely see the large IC's on the left side looking from the rear. If you try to adjust the convergence, especially the service menu, after you fix the T.V., you will have a lot of adjusting to do. Hope this helps, Dani.

Reply to
Dani

On Wed, 13 Sep 2006 18:53:59 -0400, Art Has Frothed:

Thanks for the reply. I've opted to trash it and buy a new HD unit instead of tossing hundreds into a 7 year old 4:3 screen. One more thing, how do you get it into the "serviceman" mode so I can tweak the convergence enough so my kid can watch it until the new tv arrives? If I could get the green over to the left a 1/2 inch or the other two to the right it would be more watchable.

Reply to
Meat Plow

On Thu, 14 Sep 2006 04:36:42 -0700, Dani Has Frothed:

How do I get into the service menu?

Reply to
Meat Plow

On Thu, 14 Sep 2006 04:36:42 -0700, Dani Has Frothed:

Bought two STK's from MCM (Sanyo) for 9 bucks each (on sale) Hope they are the same quality as what was inside. Don't really want to trash this set as I'm buying a new one but I'd like to give it to someone who would like one. Still need info on how to get into the service menu and maybe how to navigate it.

Thanks.

Reply to
Meat Plow

On Fri, 15 Sep 2006 22:04:43 -0400, Art Has Frothed:

So it's Menu then select cable, then timer for 30 minutes and tv volume down then hit the power button on remote?

Sorry if I seem a little thick.

Reply to
Meat Plow

Looks like R7048 - R7051 are burned up. Paint's burnt off and the board is dark. Without buying the service man, how can I find out the values of these resistors? Are they the same value as their sister components R7081

- R7084? And I didn't get right down there and look but are they all the same value (looks like green green something, maybe black on 81 - 84)?

Thanks.

Reply to
Meat Plow

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