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Projection TV Convergence

My Projection TV seems to be out of focus. The problem is on the left and right 1/4 edge of the screen. The center of the screen looks OK. The screen has a double image in red. I tried the manual convergence adjustment, but the adjustment crosses will not move when I try to adjust them.

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Re: Projection TV Convergence

You can replace the convergence amplifiers on your circuit board pretty easily. They are an inexpensive part that goes out often. I replaced mine myself and I don't have any training in this area..The amplifiers are attached to heat sinks with cooling fins. Very easy to locate. You need a solder remover with a sqeeze bulb on it ( Radio shack $14). This will allow you to remove the solder on the bottom of circuit board with out making it too hot. If you leave your soldering gun on there too long you can burn the circuit board so be careful. Also there is a capacitor in your TV that holds a lot of electricity so be careful and don't touch anything else that is conecting to power. You will first want to unplug your TV and by a repair manual that will help you with this service. Take off the back panel and you will have to unhook about 10 different plugs so mark them when you take them out. There are numbers by where they plug in. This way you can unscrew the circuit board and lift it up on edge so you can remove the solder, there is about 20 little solders on each covergence amplifier that will have to be removed before you unscrewing the amplifier from the heat sink to replace. When reinstalling you need to put a white paste on the back of each amplifier before reinstalling. Radio shack will know what you are talking about. Make sure that none of your solders are touching the other, be sure and get a small gauge of solder and not acid based or it will eat your circuit board, be sure and get resine solder. I wish I could show you but no pics available. This is for the PT-53WX52F Panasonic model. I hope this helps.

Posted on Jan 09, 2008

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Re: Projection TV Convergence

They have inherent problems with the glycol oil used to cool the tube leaking past the bladders & onto the boards.... & it's conductive :p

Posted on Dec 11, 2007

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Green on the edges

Ur tv have a magnetics interferences or a convergence problems.Move the tv to the left or right couples inches,will help if magnetics problems.Convergence prob.sorry ur tv convergence board must have it 2 STK convergence ICS,some it resistors change.The shop will cost u $300-350 for parts and labors.

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1 Answer

"Perfect Focus" problem on Samsung HCN4727W

You have a bad sensor, a bad digital convergence board, or the new board is not working correctly. I would start by swaping out the convergence board or exchange it for another one. Good Luck

Nov 08, 2007 | Projection Televisions

1 Answer

Out of alignment (red)shadow

Ur tv convergence are dead.U must know how to solder.U must have soldering tools,and solder to fix convergence problems.Must repalced 2 STK convergence ICS and some or all it resistors.Tries websites like, to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.

May 15, 2010 | Sony KP-57WS500 57" Rear Projection...

1 Answer

43fdx15b Hitachi 42in red vertical lines magic focus inop for red

This is a convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors.Shops usually charge from $200-$300

Sep 26, 2009 | Hitachi Projection Televisions

1 Answer

I just replaced the two convergence ICs in my Hitachi 53UWX10BA projection TV and it looks very good in the middle of the screen top to bottom, but as you go out both right and left the convergence gets...

Yes, it sounds to me like it only needs touch up in the tecnician convergence menu. Which you get into by pushing the service only switch after the set is on and then using an original Hitachi remote control to do the adjustments.

Jun 14, 2009 | Mitsubishi VS-50607 50" Rear Projection...

1 Answer

Picture is distorted from center on my 65" Sony projection TV.

hi. this will be an easy fix for you if you are a good solder. you will need to replace the convergence chip that is located on the PC board(main). this chip is damaged and it has failed due to this damage that has occurred. click below for your new convergence chip(stk).


May 21, 2009 | Sony Grand WEGA KDP-65WS550 65" Rear...

1 Answer

Auto focus and manual focus(red+will not move left

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.
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 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.

TV set after fluid change


2c07611.pngSolution #2

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

Apr 17, 2009 | Sony KP-57WS510 57" Rear Projection HDTV

1 Answer

Convergence issue

try fixing the convergence 2 after your've aligned the convergence 1 - the second (accessed via the set up control) let's you adjust on 9 different axis to align the red and blue tubes to the green. you select which + sign you want to adust by pressing the corresponding number for the + ie 1 for the top left, and 9 for the lower right corner.

good luck (note - you cant change the green only the red and blue, if the whole edge is a mess try moving the image (you need to be in zoom mode, and then access the position adjustment via the pitcure set up screen.

Nov 05, 2008 | Panasonic PT-47WX49 47" Rear Projection...

2 Answers

Hitachi 51SWX20B Convergence problem


Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in or warped.

Here is a quick test....

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

Try to adjust the 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.

Its a fairly easy fix on the Hitachi sets.

You can get a repair kit that includes all the parts from The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself.

Jan 28, 2008 | Hitachi 51SWX20B 51" Rear Projection...

2 Answers


Im trying to install that same board on the same tv how did you do it?

Apr 06, 2007 | Samsung HCL4715W 47" Rear Projection...

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