Question about Mitsubishi WS-65712 65" Rear Projection Television

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The blue convergence on my tv has gone out of sync and I cannot realign. does this mean the blue cannon is bad? if so, what's repair expense on this tv?

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If convergence will not adjust---the STK-393-110 CONVERGENCE IC this set uses is bad.

There is a simple reason this happens--this part is about 3 inches wide and 2 inches tall and has two rows of pins(it is black in color) the back of the chip is metal and a white grease is applied to it to transfer heat to the large metal heat sink it is bolted to keep it cool----after several years the grease dries out from the heat and the chip cannot move the heat fast enough and it fails.

You can buy a replacement IC on Ebay for about 11 dollars plus shipping---this part is located on the middle circuit board---if you remove the front speaker grill and the inspection plate behind it you will see it from the front of the set.

If you are able to remove the circuit board and know how to solder--most people can do this repair themselves---I can provide instructions.

If you cannot do this repair--shop around your area as most shops will charge 300-400 for this type of repair---if they say it "has to go to the shop" keep looking---any good tech can do this repair in your home in about 1 hour---I know as I have done hundreds of them.

Considering what the set cost new---usually this set is worth the 300-400 repair--you cannot replace it with a set of this size or quality for that price--I do lots of them here in peoples homes and charge about 250 total--house call, parts and labor.

IF YOU HAVE ANY QUESTIONS OR NEED ADVICE do not hesitate to ask me.

I am here to help people.

Regards, SD TECH

Posted on Oct 06, 2009

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1 Answer

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Hi, before I can help you, I need to know a few things like the brand and model of the TV. But I can tell you that either you need to realign your tv's convergence, or you need to replace the Convergence IC's and a few resistors. There are not to many parts in a Projection TV. From my experience, and depending how bad they are seperated, one of those two things are it.

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you need to adjust the convergence. you set up convergence 1 then 2. follow the manual. (Its easy, you just align the + signs so they make one white one (instead of three green, red, blue) sounds like something or someone bumped the tv, causing the blue lens to shift a little.

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yes its most likely the STK392-110 ICs change both at the same time. You can get replacements at the following link with free instalation instructions.
http://servicemanuals.vstore.ca/

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1 Answer

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No....needs convergence circuit repair.Usually several hundred
dollars to change out convergence IC's..................T.

Please rate this solution.......................

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