Question about Toshiba 43HX70 43" Rear Projection Television

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Blue Halo - convergence issue with 43Hx70

My convergence appears to be way out of wack on my toshiba 43HX70, but only on the lower 3rd of the screen. The Blue is way off. I see a blue ghosting or halo effect.

Any suggestions

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  • 3,459 Answers

The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the 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,PioneerBlue Halo - convergence issue with 43Hx70 - 2_bing.gif Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2
Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix herebb0cf99.png http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Posted on Apr 18, 2010

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Image on screen looks concave(middle of screen looks farther away than left or right side.)


Roseannmace,
Your TV is out of convergance. You'll probably noticed that there are red, green, and blue images. You'll need to determine if the problem is in the power supply or the convergance board. Usually, the convergance amps go bad and opens resistors. Do you know how to read a schematic and use a multimeter? You will also need to know how to remove the old parts and solder the new parts into the circuit board.

Ken.

May 27, 2010 | Toshiba 43HX70 43" Rear Projection...

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Toshiba 43HX70 convergence problem


One or both of the STK convergence chips have probably failed.

I can give you guidance on this if you are confident to do the repair. I had the same problem with my Tosh 40WH08B and after replacing these chips it works like new.

May 21, 2009 | Toshiba Projection Televisions

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sounds like you need to change the convergence chip to me. you can order a kit with instructions from www.tvrepairkits.com for most tv's.
If you plan on doing this you need a good soldering gun and a steady hand.

May 18, 2009 | Toshiba 43HX70 43" Rear Projection...

1 Answer

Toshiba 43HX70 convergence problem


Yes its actually a very easy repair. You need two STK392-110 Convergence ICs and six 1.2 ohm 2watt resistors. You can get the replacement parts and instructions at the following link.
http://servicemanuals.vstore.ca/

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Blue halo on bottom 1/3 - Convergence issue with my 43HX70


HELLO SOUND LIKE YOU NEED TO CHANGE YOU IC CHIP'S ON THE CONVERGENCE BOARD.1!1 THERE WILL BE THREE OF THEM .!!! CHANGE ALL OF THEM AND THIS SHOULD FIX YOUR SET. "GOOD LUCK"

Aug 13, 2008 | Toshiba 43HX70 43" Rear Projection...

1 Answer

Convergence problem?


you need to replace both convergence ICs STK392-110 you can get replacement ICs at the following link and they provide free instalation instructions with pictures so you can do the job yourself. Heres the link.
http://servicemanuals.vstore.ca/

May 25, 2008 | Toshiba 43HX70 43" Rear Projection...

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Toshiba 43hx70


i dought it, check aroiund the convergence ic's "stk392-xxx"

Feb 08, 2008 | Toshiba 43HX70 43" Rear Projection...

2 Answers

Toshiba 43HX70 convergence fix - now no video


I think the hardest to solve problems are those I installed!!
Where do we start==no lecture,but I never change a resistor
unless it has changed (in value!) Use a digital meter and check
the value of each resistor.Toshiba is a bit confusing as to values
of each resistor and location in relation to the IC's.Go over your own work first.Check micro fuses in power supply=F851,F852,
etc. Carefully resolder steel jumper wires at board edge,they feed
B+ to convergence amp circuit.Be sure to verify no shorts in pins
of IC's.(use your meter).........T

Oct 25, 2007 | Toshiba 43HX70 43" Rear Projection...

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