Question about Toshiba 43H70 43" Rear Projection Television

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Convergence the grid on the convergence does no tline up straight what can i do?

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Re: convergence

Not a lotof info there ?? Does any convergence control make any differance ?? does any convergence control move at all?? let me know please

Posted on Apr 03, 2006

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Monoscope signal how to get it Mitsubishi VS-6043 rear tring to adjust the picture its all warped looking got tv out of ditch tring to make it work

does the convergence align or move? how is the picture distorted? if the picture aligns but is just warped, use a jig or some string to have some straight lines to reference for your geometry and convergence. the monoscope signal is hard to find and mits had it on a vhs tape back in the day. it really just helped you get the horizontal and vertical size and get a round circle to fix the warp.. just try to make all the grid points about the same distance apart and make it an even grid.

May 26, 2010 | Mitsubishi VS-6043 60" Rear Projection...

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The grid on manuel convergence is locked w/wavy lines on the red

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.

May 24, 2010 | Hitachi 51G500 51" Rear Projection...

1 Answer

My tv has a bow in it every time a banner comes across

It is not unusual in these sets for things not to be perfectly straight---if the set has recently been repaired for a Convergence problem--someone may not have adjusted it correctly.

Understand: if it is a 43uwx10b Hitachi:

The green convergence is adjusted first for a grid of straight lines up and down and left/right---if the green grid is not straight you are going to see a bow when things scroll across the screen.

The other possible problem you may have is a convergence problem--if you go into the customer menu and try to adjust convergence--not the magic focus-- are the blue and red adjusting or not?

I know the HItachi sets very well--I own two of them and have repaired hundreds of them.

Let me know if you have more information or need advice--I am here to help people.

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


Nov 05, 2009 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

I have a Mitsubishi WS-65809 Rear projection TV the fisheyes or bent screen.

Try to describe problem better----is picture concave or bowed with colors out of place or is is just not straight?

If in doubt go into customer menu and select convergence and then advanced(instructions will be on screen) it will bring up a grid of lines--what you are looking for and I need to know is is the grid not square or are there red or blue lines with or without a bow in them?

The more you can tell me the better the chance I can help you--I am in California and will be here for the next few hours.


Oct 27, 2009 | Projection Televisions

1 Answer

My convergence is fine but after professional replacement of the board there is a slight bowing and slanting of in-screen borders and some channels have a little distortion at the top of the screen. The...

First: If the convergence board was replaced--the set may need a total adjustment---this is why most good techs replace the convergence chips and any bad parts instead--also costs less----Second: to enter the service mode (it is done with the set already turned on) should be Mute, 182 or Mute 183---if you get the convergence mode--7,8, 9 will select red, green, blue, 5 will stop the cursor from blinking and allow adjustment---with the cursor blinking 2,8, 4, 6 will allow you to navigate---depending on the remote used--the P mode button will take you across the screen in a series of steps--the remote I use for this has a button on it marked data save--this saves the adjustments. Your remote may have it or a different button for this.

Understand---if you get into the convergence mode---Green determines if the geometry of the picture is straight---red and blue are adjusted to it---to align the green you need to call the convergence mode up and then cover the lens for the red and blue---leaves you with a green grid---then you need to select green and wherever the grid is not straight adjust it--once you get it straight you need to uncover the red and adjust it to the green, and then the blue to the green---green alignment determines if the picture is straight---It sounds like this guy did not try to get the green straight and just adjusted the red and blue to whatever the green was.

My point here is if you paid money for this repair--either he aligns it straight or you should get your money back----GREEN never needs to be adjusted unless the dcu(digital convergence unit that stores the adjustments) has been replaced or the Convergence module has been replaced---I bet if the original convergence module was repaired(chips replaced etc) and installed you would not have this problem.

If the guy replaced the DCU then GREEN must be fully adjusted for a straight picture FIRST! then red and blue adjusted to it.

It is not easy or quick to Adjust the green--maybe he just wanted to get out the door?

I do this here for free so if this has helped you take a minute and give me a vote here.

If you have any questions or need help reply to this post here.


Sep 05, 2009 | Samsung PCL6215R 62" Rear Projection...

1 Answer

Convergence issues

Drifty convergence IC's need replacing..located on center PC board......STK392-570...change them both for reliability...T.

Feb 28, 2008 | Mitsubishi WS-65809 65" Rear Projection...

1 Answer

Adjusting convergence grid

i correct grid will look all white. all colors aligned up.
you should be able to move the lines with the remote. and you cant burn anything out by doing convergence.

Jan 27, 2008 | Samsung HC-P4752W 47" Rear Projection...

1 Answer

42"Samsung HCN4226WX/XAC

· Samsung parts for convergance problem

Oct 09, 2007 | Samsung HCN4226W 42" 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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