Question about Mitsubishi WT-46809 46" Rear Projection Television

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Convergence I have a convergence problem (blue, green, red "rainbows" on top and bottom of screen). After the TV is on for around two hours, the screen returns to normal. I don't want to have to put this TV on a timer to turn on two hours before I want to watch it. It seems changing convergence setting might mess up something since the problem fixes itself after a couple hours. Ideas?

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  • dmdosen Jul 23, 2010

    I'll try to replace the IC's.

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Hi


Thanks for using FixYa. The issue is with the failed convergence (STK) ICs which needs tobe replaced. It’s not a difficult job if you want to do this yourself, youshould require some basic knowledge about soldering-resoldering components. Tostart with you’ll have to open the back of the unit and then replace the ICs(STK ICs) which are located behind the black heat sink and also check theresistors as if they are short the ICs might blow again after sometime. Please check this picture:


Convergence - b89024c.jpg



Thereare repair kits available whichincludes repair instructions with the parts, if you want to do it yourself, youcan buy and repair it yourself. Please do accept thesolution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

Posted on Jul 23, 2010

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Hi I have a rca hd52w59. the top half of the


Projection sets have two very common problems.

The first common problem is convergence

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped or bowed
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

bb0cf99.pngYou 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

Jan 24, 2010 | RCA HD52W59 HDTV Projection Television

2 Answers

Projection HDTV Pansonic 47" Curving blue and green colors on top and bottom of screen.


You will need to replace your two convergence I.C.s.They are two large IC mounted on a large aluminum heat sink.Replace both,look for any burned resistors near them,replace those if needed,and readjust your convergence. Good Luck

Let me know if you need any further help

Mar 29, 2008 | Panasonic PT-47WX42 47" Rear Projection...

1 Answer

Convergence issue... I tried to manually fix it through the menu option without any luck. The convergence does curve at the top and bottom of the screen.


It seems the solder is broken in Vertical Convergence Amplifiers or it is damage internally. This model has 2 Conv. Amps: 1 for Horizontal (Red, Green and Blue) and 1 for Vertical Convergence output (Red, Green and Blue), if the convergence does curve at the top and bottom, it is because Vertical Converegence output is no good. The Conv. Amp. costs around 20 dlls. Thats why you can not fix it with the Menu option. Good luck!

Nov 13, 2009 | Philips 60PP9202 60" Rear Projection...

1 Answer

Sometimes I get a rainbow on the bottom of the screen.


Your TV most likely has a convergence failure. ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem


  • 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.
Here are some photos of convergence problems.

3dc9420.jpg
645fba6.jpg
0dcec37.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

0667c5f.pngSOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Jun 18, 2009 | Philips 60PP9202 60" Rear Projection...

2 Answers

Hitachi Television


Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


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

2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.

Feb 18, 2009 | Hitachi 53UDX10B 53" Rear Projection...

1 Answer

Convergence issue?


This still could be the convergence . This will should be repaired by a tech if you do not know how to repair . Around $200 - $300 if you could get it to him or more if he has to make a service call . Call around for the best price as alot of shops vary in there charges. On this problem if it is the convergence make sure they will use the original IC's and not the cheap replacements as they do not hold up as long . Good luck

Mar 03, 2008 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Picture Quality


Sounds like your convergence amps are probably bad. Check out http://i114.photobucket.com/albums/n248/OFilippov/Dont%20look/Pioneer/BadPicture03.jpg and see if you have similar bowing between red and green when you try multipoint convergence. If so, you'll need new convergence amps, part STK392-120. Most people who are handy with a soldering iron can replace these parts in a couple hours.

Jan 15, 2008 | Philips 60PP9202 60" Rear Projection...

10 Answers

Hitachi television repair


how do i access the convergence on my big screen

Oct 16, 2007 | Hitachi 61SWX10B 61" Rear Projection...

2 Answers

Warped Picture, Separated colors


Each color (red,green & blue) has an amplifier IC (STK-).
When there is a convergence issue,the first step is change both
IC's for reliability. Then check for open fuses devices,usually
pico fuses.Then re-check convergence alignment.......T.

Feb 07, 2007 | Philips 60PP9352 60" Rear Projection...

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