Question about Mitsubishi WS-55805 55" Rear Projection Television

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Mitsubishi projection HD

I have a 2000yr. WS-55805. I just had the convergence fixed by replacing the two chips and that works fine but now I get a flash of red and light green color. It's only a quick flash but it fills the entire screen for a mili-second. Do I need new tubes? If so where can I get them.
I hate to dump the tv it's a $4000.00 model

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Re: Mitsubishi projection HD

I dont know where you live but my tv has a totally different problum.if you pick it up you can have it. mine has a problum with turning on and off but picture is fine.i bought a new one so if you pick it up its yours

Posted on Jan 15, 2009

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Re: Mitsubishi projection HD

How long after you replaced the chips has it been working?
did you check the resisters?
did you check to see if you have bad caps?
replace DM

Posted on Jan 23, 2008

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ONLY HD picture does not fit on WS-55805

To be kind you are wasting your time, This is a 1st generation HD set not designed for the modern equipment you are using---You cannot turn a Model A Ford into a Roll Royce.

I has only one HD input designed for a set top HD box providing it a 1080 I signal.

Dec 04, 2012 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

Mitsubishi WS 55805 nothing but blue screen and black square in middle

A full service manual is available online---I will presume you tried to unplug it for a while and then power back to see if will reset itself.

This set has three hidden menus---one is the OPTION menu--in that menu with the Mitsubishi remote you can do a hard reset of the entire set= sets all back to factory except convergence adjustments which are stored in another area--cures all kinds of oddball issues.

I can give you a link to the manual and the page numbers for the OPTION menu.

Note: the other two hidden menus are Convergence and adjustment--do not go into adjustment menu as one wrong move and poof!


Apr 20, 2012 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

11 1/2 year old Mitsubishi WS-55805 - 55 in rear projection TV has convergence issues as the colors are starting to shadow. Trying to weight the cost of repair or replace. Any suggestions?

This model should use two of the STK392-040 convergence IC chips.
Parts cost on Ebay for a pair of these is under 35 dollars.

Repair does involve soldering and removal of middle board in order to get at the parts.

I have step by step instructions for a similar model that is available.

If you or someone you know can do the repair you can save a lot of money and the set.

These sets are much more reliable than the Plasma and LCD type sets.

Here in San Diego most shops get about 200-300 for this repair.

It can be done in your home, I have done hundreds of them in homes.

If you want to see the instructions let me know and we will find a way to get them to you.

Before you rate this information let me know if you have questions.


Jul 21, 2011 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

Poor color quality

IF the model is WS-55805 as indicated both of the STK-392-040 CONVERGENCE chips need to be replaced and the set adjusted.

One is bad for sure and it is best to change both. Parts cost is under 30 total for this and it may be a do it yourself job if you have some skill.

I have start to finish step by step instructions that should be close enough to get the job correctly done.

Let me know----I have fixed hundreds of these sets with this kind of problem.


May 13, 2010 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

Mitsubishi WS-55805 CRT projection TV with

This problem is most likely caused by damage in the convergence output amp IC's; this model uses STK392-040. Fairly common for various fuses that protect the DC supplies for these amp IC's to open as well.

Mar 03, 2010 | Projection Televisions

1 Answer

I cannot adjust the blue with the remote. Is there way to adjust.

WS-55805 ?

Look on the back of the set and confirm the correct model number--55805 does not show as a good model number.

If blue will not adjust what ever it uses (either one or two convergence chips need to BOTH be replaced and then the set adjusted.


Double check the model number and let me know and I will tell you what parts it uses and also then be able depending on the model number to give you the instructions etc.

If this has helped you rate this solution as I do this here for free.


Dec 09, 2009 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

HD issues with ws-55805

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 projeciton 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 photos of convergence problems.



Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Sep 30, 2008 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer

My ws 55805 yr. 2000

check this site first
if you dont have this in your set then
check convergance amp ic.

Oct 24, 2007 | Mitsubishi WS-55805 55" Rear Projection...

1 Answer



Sep 15, 2007 | Mitsubishi WS-55805 55" Rear Projection...

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