Question about Mitsubishi WT-46809 46" Rear Projection Television

2 Answers

CONVERGENCE PROBLEM... I THINK

I THINK MY TV IS EXPERIENCING A CONVERGENCE PROBLEM AT TIMES. WHEN I TURN THE TV ON INITIALLY, THE PICTURE IS FINE FOR ABOUT 2 MINUTES. THEN THE CONVERGENCE GOES OFF AND THE PICTURE APPEARS 3 D LIKE. THE PICTURE AND CONVERGENCE EVENTUALLY CLEARS UP ON IT'S OWN WITHIN 10 - 15 MINUTES. I'VE TRIED CORRECTING THE CONVERGENCE BY RESETTING TO FACTORY DEFAULTS AS WELL AS MANUALY COLOR BY COLOR. WHAT'S CAUSING THIS PROBLEM? THIS HAS BEEN OCCURING FOR OVER A YEAR. ANY ASSISTANCE WOULD BE APPRECIATED. CMOORE

Posted by on

  • Anonymous Mar 25, 2014

    Initially picture is ok. After a minute or so it appears to have a veil over it giving a cloudy view. TV about 7 years old.

×

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 4 Answers

I had the same problem. The issue may be the same although I am not sure the powering off is related to the convergence issue. This is what I did: 1. Order the STK392-570 convergence IC and heat sink thermal transfer paste( I silicone based)..(make sure it is a reputable company so you don't risk getting bad components, I got them from an electronics supplier in MD) 2. UNPLUG YOUR TV AND ALL COMPONENTS!!!! 3. Remove the back cover and black plastic cover. (retain all parts) 4. remove the retaining bolts and screws on the black plastic tray (they are on the sides verticle mounted and front center as you are looking down on the tray.) This allows the tray to slide out like a keyboard on a computer desk. DONT PULL IT OUT YET!!!! 5. Just above the boards there is a shade board that slides out. Carefully pull it out. 6. You will have to unplug all cables ON THE BOARDS except for the RED ONES ON THE FAR RIGHT and provide tension relief for the cables by carefully unraveling them. The cables are marked on the connector and match to the markings on the board (I.E. KM, all connectors are marked with a two letter designation) Just disconnect the cables from all the boards and nothing elese. 7. Now carefully slide the tray about half way so you can see the contents of the entire center board. This is the board you need. Look in the back center of the board. There is a really large heat sink. The ICs are on the back side of this heat sink. They are held in place by a retaining bar that sandwiches the heat sink to the ICs. 8. There are some connectors on three sides of the board that are flat and white. CAREFULLY ....AND I MEAN CAREFULLY pull the left (as you are looking at board) ones up and disconnect from the center board. The ones on the right (I think they disconnect from the right board). 9. Unscrew the board from the plastic tray. There are a lot of them around the perimeter and center as well as the ones that hold the heat sink onto the board ( they also hold the board onto the tray.) You have to remove the "sandwich bar" (refer to 7)in order to get at the screws that hold the heat sink to board. (you have to unscrew them. 10. There is a box shaped cover on the left front part of this board that is screwed onto board and is also part of the retension to the plastic board, remove it to. (always remember to be careful when tugging, unscrewing, ect as it could result in breaking somthing) 11. There are black plastic tabs to the rear of the board. Unhook those and CAREFULLY lift and pivot the board forward and then up and out. 12. Now comes the easy part. You may have to pry the heat sink from the ICs carefully because of heat sink paste. Clean off the heat sink (dont use cleaner, just wipe the old grease off) 13. Use a good soldering iron (PACE, regulated, good desoldering iron) The temp just needs to be high enough to heat solder. 14. MAKE SURE YOU REMOVE THE CARD THAT WE TALKED ABOUT EARLIER that is in the front left of the board. You dont want it to break. Turn the board over so the chips are facing down. Take the desoldering tool and put it over the pins and in a circular motion until it heats the solder and push the sucker button. Do this to all of them that relate to the ICs. DONT KEEP IT TOO LONG ON BOARD. once you have done that to all pins, gentely tug on the chip wiggling it out. (carefully!!!!!) if you feel resistance desolder a little more. Make sure your desolder device is giving enough suction. 15. Now solder them back on and make sure you dont create any cold solder joints. This would be bad!!!! 16. Apply a decent amount of thermal heat transfer (grease, goo, ect) Make sure you do this or bad things will happen. You need this stuff. You can get it at radio shack. 17. Now put it back together and hurray you are done... Hope this helps... GOOD LUCK DJ

Posted on Jun 23, 2007

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 337 Answers

This kind of problem ussually starts by being intermitant and the first thing to try is to resolder all the pins in the convergence IC's , they create a lot of heat and are mounted on heat sinks for that reason but after a while the solder cracks and it does not make a good conection,down the road they migh need to be replaced but for now lets hope they only need resoldered as well as many other overheated areas in the chassis.Let us know if you need more information.

Posted on Nov 06, 2006

  • Omar Urrutia
    Omar Urrutia Nov 06, 2006

    Your rating response is also important.

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

4 Answers

Hello, My Westinghouse ltv32w1 LCD TV is only 2 years old. Sound is fine, picture is not so good: Initially when TV goes on picture is okay, then after 30 minutes, the image breaks up into verticlal...


verticle lines are most likely a bad tube or convergence problem. You will not be able to fix this your self . I suspect a bad convergence ic

Sep 17, 2008 | Televison & Video

1 Answer

When I first turn on the TV the picture is messed up sometimes it shows a double picture.If I turn it on then off and back on again the picture is fine.Whats wrong? My second problem is that when I turn on...


Ur tv covergence board it is dying.Tv are developing a convergence picture problems.Tv have colors R,G,B lines mis alignments,have colors shadows pictures or 3D pictures look alike?Yes,than the tv convergence board it dying must require replacement like 2 STK convergence ICS and some or all of it resistors too.Fixed the tv convergence board to solved the tv convergence picture problems.The shop will cost u like $300-350 for parts and labors.

Jun 30, 2011 | Mitsubishi WS-55819 55" Rear Projection...

1 Answer

Hello, I have a 2005 Sony KP-51WS520 Rear Projection TV. Recently, the green colors all become a yellowish/orangish color. When you are watching a baseball game the grass is a orangish color. ...


DLP tvs have a design weakness,the problems it is call a convergence problems,it is dead.This convergence problems,will have happen many times through out the tv live.The tv have a colors R,G,B lines misalignments,have colors shadow pictures or 3D pictures look alike?Yes,than the tv board,that call the tv convergence board it is dead.The tv convergence board,must require changes 2 STK convergence ICS and some or all of it resistors too.To fixed the tv convergence board to solved the tv colors picture convergencce problems.The tvs shops will cost u like $300-350 for parts and labors.

May 24, 2011 | Sony KP-51WS520 51" Rear Projection...

1 Answer

Not sure if its a picture tube problem or convergence problem. TV was working fine, put a DVD on pause, came back 10 minutes later and poof! Distorded picture almost 3D like. Shut it off and when it came...


Check the micro fuses that power the convergence board, one or two maybe open, While doing this also resolder the flyback transfomer and area around it. Check for cold solder joints in this area as well.
Replace any open fuse with 5amp same type. If fuse are good then convergence power board is faulty and needs serviceing or replaced.

Dec 21, 2009 | RCA HD52W58 52" TV

2 Answers

Led light flashes thre times


I would initially suspect IC7001 and/or IC7002 on the D board. Those are your convergence output IC's. Those tend to fail after 5-10 years of typical use. Part# STK392-150 is available as a direct drop-in replacement part and repeat failures are almost unheard of. Also, check the low-ohm feedback resistors around these chips. R7011, 7012, 7013, 7014, 7015 and R7016 should all be 2.2 ohms @ 2 watts. If you have a shop do this, the typical price including travel and house call is $300-400. Parts alone are about $50, give or take.

Aug 18, 2009 | Panasonic PT-53WX53 53" Rear Projection...

1 Answer

Loss of picture on Pioneer Plasma Tv


i have a pioneer 43 inch bought in 06. tv wont turn on light flashes red the light means standby. what does this mean

Jun 07, 2009 | Televison & Video

1 Answer

Tv repair


My Tv was doing the same thing, and I had to unplug the set in order to get rid of the blinking light. And what i did was to turn the power on and as soon as i saw the picture i turned it off, I did this 5 times and on the 6th time I let it power and tv stayed on, however something did happend to my set, i found that my convergence was wacky. Tried to center convergence but i could not center the blue. Turns out, i think the problem is with my Convergence ICs that went bad. I can still watch tv but the Image has blue color shadows and the picture slightly bows inwards from top and bottom. To sum this up, i will need to replace 2 ICs, IC C5AA00000203, and this should fix my problem. I will do this repair myself, each part is about $41..

Let me know what happened to your problem.
Thanks
Tony

Dec 01, 2007 | Panasonic PT-53TW53 53" Rear Projection...

2 Answers

JVC I'Art. 65" projection TV. AV-65WP74 green screen sages real low.


you have bad convergence ic and or resistors
this repair usually requires a repair tech

Nov 12, 2007 | JVC AV-56WP30 56" Rear Projection...

4 Answers

Toshiba 51H84


convergence IC's need to be replaced

Dec 12, 2006 | Toshiba 51H84 51" Rear Projection...

Not finding what you are looking for?
Mitsubishi WT-46809 46" Rear Projection Television Logo

87 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mitsubishi Televison & Video Experts

matt martin
matt martin

Level 3 Expert

1230 Answers

The Knight
The Knight

Level 3 Expert

75846 Answers

Jaime Hernandez

Level 3 Expert

2336 Answers

Are you a Mitsubishi Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...