Question about Toshiba 55HX70 55" Rear Projection Television

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Convergence amps Hey I have a 55HX70 that looks like it is in 3D I was wondering if this is in fact a convergence amp problem and if so where are they located so I can change them

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You need to change the ics that are located on the converge board is the one that is screw to the heat sink change both or the closes to the rear is for green vertical and horizontal and blue vertical and the one closes to the front is for the red vertical and horizontal and blue horizotal it starts with a STK number.

Posted on Aug 28, 2008

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LG Projection TV Model# RT-49NA11T Green color gun shows bent arc on top & bottom.Red & blue guns are ok.How to adjust the green gun to remove the bent arc. This is causing picture shows mix...


This problems ur tv have can't not be fix by adjustment.The tv have a problems known as convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadow pictures or 3D pictures look alike?The tv convergence board have dead 2 STK convergence ICS and some or all of it resistors too.These parts on the tv convergence board,must be replaced to repair the tv convergence board to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

Jan 10, 2011 | Panasonic PT-53WX53 53" Rear Projection...

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It looks like the bulbs are not aligned. The upper half of the picture is fine. The lower half has the red above the blue to there is double picture. I just picked up the TV for free. Any suggestions?


This tv have a problems known as a convergence problems,it dead.The tv colors lines R,G,B mis alignments,have colors shadows pictures or 3D pictures look alike?The tv convergence board have 2 dead STK convergence ICS and some or all of it resistors are dead too.These parts on the tv convergence board,must be replaced to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

Dec 13, 2010 | Toshiba 55HX70 55" Rear Projection...

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Picture is distorted with green tint on one side & pink on the other


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.

Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

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 - TV may also make a chirping noise.
Here are some photos of convergence problems.

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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.

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 solution

93a1209.pngCONVERGENCE SOLUTION

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 know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

Jan 02, 2010 | Toshiba 55HX70 55" Rear Projection...

1 Answer

Pic looks like 3d


Convergence chip and capacitors damaged on the Y sustain board Cant be tuned from the unit controls

Please rate my help++++Thanks for using FIXYA

Oct 24, 2009 | RCA R52WH73 Projection Television

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Toshiba 55hx70


You have convergence output failure. The output ICs will need to be replaced and possibly a small component like a resistor or two as well. Expect to pay a service company $350-$450 to resolve this.

michtech

Feb 09, 2009 | Toshiba 55HX70 55" Rear Projection...

1 Answer

Toshiba 55HX70 convergence


A 400-500.00 repair estimate is normal...... which means
the tv has no wholesale, broken value....................T.

Feb 06, 2008 | Toshiba 55HX70 55" Rear Projection...

1 Answer

Television is out of convergement


You need new convergence amp ICs there are two of them replace both. They cost around 10.00 each.

Feb 02, 2008 | Toshiba 55HX70 55" Rear Projection...

1 Answer

3d effect


Sounds to me like your convergance amps are on their way out...

Nov 21, 2007 | Zenith R56W36 56" Rear Projection...

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Amps replaced...still getting 3D pix. The amps are not getting power. HELP!


Hi Brulia

There should be approximately 8 to 10 fuseable resistors around those convergence ics. They should stand out as they are a bright yellow colour. You should measure a short over them. If none of these are faulty I would leave the supply to the convergence alone and rather check the +5V / -5V and +12V supplies used by the convergence logic ICS. A common problem is the - 5V supply also used for your HT-protection cct op-amps. These ics goes short and pulls the supply to ground. There is no protection on these before mentioned supplies and therefore the set is still switching on but with a convergence problem.

Hope this helps.
Dawie

Oct 31, 2007 | Sony KP-57WS500 57" Rear Projection...

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