Question about Mitsubishi WT-46807 46" Rear Projection Television

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Wt-46807 believe i have the same problem - intermittent convergence fail (see occasional triple sets of images in different colors) would like to try to resolder the appropriate parts but am clueless as to what's inside and where they are... can you post (or direct me to) photos of the board and parts to be re-soldered? also, is there someplace i can get ahold of schematics & diagrams (photos too if avail) for this TV? Thanks

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IN YOUR CASE YOU HAVE COLD SOLDER, JUST PULL THE POWER SUPPLY AND YOU'LL SEE THE CONVERGENCE IC'S THEY ARE EASE TO INDENTIFY. THE NUMER STARTS WITH STK.....



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Posted on Oct 02, 2008

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How do I replace the fuses on a WT-46807 that protect the convergence circuit?


There are no fuses going to the convergence board, the converegnce IC needs replaced.

Aug 08, 2011 | Mitsubishi WT-46807 46" Rear Projection...

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I have encountered convergence problems as well with my older Mitsubishi WT-46807 and would be appreciative if I could get repair instructions. My email address is djmerrill77@yahoo.com Thanks.


Please do us a favor and rate this solution after reading.

Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both. Repair kits with instructions are also avail from www.TvRepairKits.com

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....


  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


7859b01.jpg

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69189a5.pngSOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

69189a5.pngSOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Please do us a favor and rate this solution after reading

May 16, 2011 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Picture is blurred by tri-colored image (yellow, red, green or blue)


The tv have a problems known as convergence problems.The tv convergence board are dead.These parts on the tv convergence board must have it 2 STK convergence ICS and some or all it resistors replaced,to solved convergence problem.U know basic soldering,have all the tools?Tries websites like Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to do the repair it ur self.The shop will cost u $300-350 for parts and labors.

Aug 25, 2010 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

My picture is blurry, re-setting the convergance helps


This is a common problem. Its called a convergence failure.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Video may look distorted
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Feb 19, 2010 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

WT-46807 Red convergence is distorted, in an arch at the bottom.


Yes your model is the V17 chassis mitsubishi. The Convergence Ics are located on the center board. you will need two STK392-570 convergence ICs. You can get replacement ICs at the following link and they provide free installation instructions. They are located on the backside of the wide heat sink with the fins on it on the center board
http://servicemanuals.vstore.ca/

Jan 18, 2009 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Powering down


THAT'S CORRECT, YOU NEED SOMEONE WITH ELECTRONICS SKILLS TO FIX THIS PROBLEM. YOU HAVE A POWER SUPPLY PROBLEM AND I BELIEVE THAT THE CONVERGENCE IC'S HAVE TO BE REPLACED TOO.SO CALL AN EXPERT IT WON'T COST MORE THAN $350.00

Aug 25, 2008 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

TV is Ghosting


if convergence problem color would be bowed and off. If it is the convergence replace ic stks there are 2 inside tv if you could solder and good at this stuff. parts cost is 30.00 . if you are going to get fixed cost is 300.00 . www.part store.com has parts just give them model number .They can tell you part number.I would pay someone to do this it is trickey.

I think ghosting is ground problem on cable connections check connections and replace cable wire.


thanks doctor video

May 18, 2008 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

Mitsubishi WT-46807 46 in picture bends and the blue red and white all seperates


intermittent convergence fail. suggest re-soldering the 2 convergence output ICs on the middle power board. they are the 2 large devices located on the largest heat-sink on the middle board(looking at from back) once you re-solder them as long as the aren't faulty internally you should be all set.

Mar 28, 2008 | Mitsubishi WT-46807 46" Rear Projection...

1 Answer

The red portion of the image jumps away from the other two colors


1)The correct solution is (a)....
2)Concerning pulling the chassis on a 46" Mits...
due to compact size,your set has a higher degree of difficulty.
The 73", 65" and 55" are easier to do the same repair.
3)Begin by removing lower front cabinet,then remove front access
panel.Next provide yourself with plenty of light to see inside....
Remove chassis bolts (3) in rear',unplug as needed,noting location
and routing.Next,locate snap clips on front of circuit tray-Release.
Gently pull back on chassis until clear to remove center board.
Almost must pull all the way.Remove & rebuild center PCB.
Re-assemble,test.
  

Oct 22, 2007 | Mitsubishi WT-46807 46" Rear Projection...

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