Question about Toshiba 55H70 55" Rear Projection Television

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Projection TV convergence problem

The convergence is off on our Toshiba 55H70 Projection TV. The red + will move to form a white + Is there a way to get this fixed or should we just buy a new TV we will need to upgrade before the big change in 2009. However we are a little strapped this month and would like to just get it fixed.

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Get it fixed, because this is a simple repair. One of your convergence IC's has burned out and needs to be replaced. A good tech can fix the set in-house in about an hour and a half, and I charge $150 when I fix a set like that but shops in your area will vary so ask around. If you have a satellite receiver or a cable box, the changeover in 2009 should not affect you.

Posted on Sep 04, 2007

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Posted on Jan 02, 2017

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1 Answer

I can't get the red color to move and converge with the blue and green ... HELP?


You have a bad resistor 1.8 ohms it controls the red convergence
you have 3 of them all are 1.8 ohms 1 watt they are located in front of the Convergence ICs STK392-110

Aug 13, 2010 | Toshiba 55H70 55" Rear Projection...

1 Answer

Convergence problem w/55h70. red is ok but can't fix blue. Is there a component or board that is easily replaced?


Yes,U have some basic machanicals skills?The Toshiba Tv convergence board,it call a Hyper board.Try website Ebay.com to buy a refurbish board.This board no longer produced by Toshiba,if can't find it.The Convergence 2 STK ICS,and some or all it resistors,must replaced manually.Must have tools,and knowing how to do basic soldering,to do this.

Apr 06, 2010 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba projection tv three colors


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.

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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. 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

69189a5.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 are handy and can follow directions. You can get complete repair kits from TvRepairKits.com 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.

Mar 23, 2009 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 55H70 COLOR PROBLEMS


turn your red screen voltage down till you get grey, your convergence out puts will need replacing
also the limiting resistors usually a low resistance, cheers parts from global look for stk -*.*

Oct 08, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

Parts for a Toshiba 55H70


I had the same problem. Different model same chassis. 1 convergence IC overheating was caused by red yoke. NLA at Toshiba. Fortunate customer had an extended warranty and got a new tv.

Jun 23, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

Convergence fuse Toshiba rear projection tv


Wire jumpers need re-soldering....Locations 008,010,017 etc
on inside edge of signal board near convergence IC's.....research
my Toshiba " H " Model rear projection " blows fuses" solutions.
...................................T.

Jan 27, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

Can not align color dirvertions on test screen


I think you need a remote to use the convergence features of this set. Does it have an auto convergence feature? And does it work?

Dec 31, 2007 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 55" 55H70 model. Turns OFF, but won't turn ON until I unplug it from the wall first.


sounds like loose connections on the convergance amps ic's
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Aug 22, 2007 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 55H70 had convergence problem fixed that now vol.went out


check to make sure that the tv switch on the back panel for surround sound is not in the on position check the customer menu to make sure that the speakers are turned on

Sep 28, 2006 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 55H70 convergence problem fixed but now vol.is gone


I just posted a question about a convergence problem( juice07 ). I am unable to adjust the red color in the convergence adjustment mode. Did you have a similar problem ?? Please help.

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