Question about Mitsubishi VS-50705 50" Rear Projection Television

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V-50705 convergence issue

Dan,
Got referred by besttootingood. We have been working on my Mitsubishi proj with a preceived convergence issue. I've replaced the chips but still have the same issue. If I leave it off for a couple of days and then it works for a few days then splits again. I have not replaced any resistors especially the feeders. I'm not good with identifying from the schematic which ones they are. I have the service manual and can find on the board which ones via part number. I just need that help. I have the V7 chasis with the chips on the signal board not on little stand up ones so I can't just replace them I'd have to replace the entire signal board. Besttootingood thought you may have more time and be more familiar with this set. I've been using e-mail outside of fixya.com. the address is smthomas@live.com if for some reason we loose link in here. thanks.

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Since the unit works on occasion, I'd be leaning toward a connection problem more so than a defective component. Go over the entire convergence board and resolder any connections that appear grainy or have rings. See if that has any effect on the behavior. If not, then we need to start looking at parts that are being effected by heat. Try to see if there is any particular pattern to when the problem begins. I don't have hte schematic with me at the moment. One other resource for you would be to visit techlore.com Post this question to Larry. He has the most experience with these sets.

Dan

Posted on Sep 08, 2008

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Color distortion, hazy snowy screen with thin red lines, suddenly happened had perfect pic 24 hours ago


Tv have a problems known as a convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadows pictures or 3D pictures look alike?The tv convergence board is dead.The tv convergence board require replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

Feb 01, 2011 | Mitsubishi VS-50705 50" Rear Projection...

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We have a 52 inch rear projection Mitsubishi not sure of the model number and the picture is starting to go blurry with reds and greens at the bottom of the screen


Here is another similar problem with a Mitsubishi Rear Proj. TV and it has some things to try and an estimate if that is the problem.

"Cost of convergence repair is always around $400"

http://en.allexperts.com/q/TV-VCR-Stereo-1749/Mitsubishi-WS55511-Projection-TV-1.htm

You could also try messing around in the menu for convergence adjustments. Usually it will let you adjust at 8 points on the screen.

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Need new convergence amp ic's and probably a few resistors.
Cost you about $30.00 for parts.
Search for keyword "convergence".
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I have a Mitsubishi Rear Projection tv (vs-50705). The picture shows a concave image on the top and bottom of screen and the edges go off the screen. I have red blue and green ghost images on the screen...


Well, you did the right first step. However, when the convergence outputs toast up they sometimes cause other problems. First would be the fuses that supply them voltage. These are pico fuses back in the power supply. Second would be open supply resistors that have opened up because of the excessive current draw caused by the whacked out convergence amps. When changing the outputs doesn't solve the problem it takes the repair out of the realm of the do-it-yourselfer. My recommendation is to let a professional take over.

Jun 06, 2009 | Mitsubishi VS-50705 50" Rear Projection...

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My Mitsubishi VS-50705 has an all over 3-D effect.


Yes it sounds to be convergence issue .

You have convergence problem in your tv . You need to replace convergence IC . YOu can get from the link below .

Convergence ICs

You need to replace both convergence ICs .It will cost you around $30 .
The IC number is STK392-110 .

Hope this helps .

Mar 03, 2009 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Mitsubishi 50705


Good Day, tree64;
More than likely the convergence problem the TV has wont be resolved by adjustments. In your situation, moving TV, the problem most likely is poor solder connections on the convergence IC's. They are large devices attached to very large heat-sinks, and have numbers on the IC'c like STK 392-560.
If no poor connections....replce.
Good Luck, big IRISH.

Jul 04, 2008 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Mitsubishi VS-50705 convergence problem.


There should only be a couple of STKs, the R's are resistors, they STKs should cost under $20. This should be everything you are looking for. If you need anything else, let me know.

CHASSIS: VZ7
MODELS: VS-45605 / VS-50605 / VS-50705 / VS-55705 / VS-60705 / VS-70705

Ref # / Part # / Part Name & Description
IC8C01 267P141030 HIC- STK392-110
IC8C02 267P141030 HIC- STK392-110

Jun 05, 2008 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Mitsubishi VS-50705 50 in apparent convergence problem.


First thing a tech would do is solder around Convergence amps then check to see if you can align by menu then if can not. Change amps and maybe resistors.

May 19, 2008 | Mitsubishi VS-50705 50" Rear Projection...

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