Question about Toshiba 43H70 43" Rear Projection Television

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I replaced the stk chips on my toshiba 43h70 and the convergence is worse than before. Any suggestions?

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Check your soldering,look for any burnt resistors,open traces,small elecrtrolytic caps

Posted on Nov 18, 2009

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1 Answer

Convergence and shut down


If the model listed is correct the only way to know if the stk-392-110 chips this set uses for convergence are causing shutdown is to unsolder all pins on both chips and see if set comes on.

Jun 02, 2012 | Toshiba 43H70 43" Rear Projection...

1 Answer

The picture is warped red & blues distorted


Your Convergence ICs have failed. It is very common on rear projections. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.


Note if one STK chip fails, you replace both regardless. They will be right next to each other.

Feb 20, 2011 | Toshiba 57H81 57" Rear Projection...

1 Answer

I HAVE A TOSHIBA 43H70 I BOUGHT IN 2001 AND THE RED AND BLUE ARE OFF ON THE RIGHT SIDE. I HAVE TRIED TO USE THE CONVERGENCE BOARD TO STRAIGHTEN BUT MY RED WILLNOT MOVE TOWARD THE BLUE OR GREEN. ON NUMBER...


This tv the convergence board are dead.Any colors R,G,B mis alignment,don't matches any colors lines.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts are dead,must be replaced to solved convergence problems.The Shop will cost u $300-350 for parts and labors.

Jul 08, 2010 | Toshiba 43H70 43" Rear Projection...

1 Answer

Toshiba 65hdx82 convergence issues


check fuse resistors near STK, and broken PCB around digital convergence board (board in a metal box verticaly mount beside STK.

Apr 23, 2010 | Toshiba 65HDX82 65" Rear Projection...

1 Answer

Shuts off on its own


intermittant shutdown ? Need to unplug to restart ? If yes often 2 convergence IC STK 392-110.

Apr 21, 2010 | Toshiba 43H70 43" Rear Projection...

1 Answer

I am getting ready to replace the 2 STK392-110 IC for a convergence problem on my Toshiba 43h70. Where would I locate these two ICs so that I can save time trying to find them.


on the signal board. you need soldering iron and lead. make sure you won't short the STK pins..good luck :) and also check pico fuses.

Dec 29, 2009 | Toshiba 43H70 43" Rear Projection...

2 Answers

Blue Convergence wont move left and right


Near the middle of the chassis inside you should see two large metal heat sinks---the chips(2) are black and about 2 1/2 inches wide x 1 1/2 inches tall and should have the STK-392-110 NUMBER printed on them in white.

The hard part of this is first you have to unplug several cables so you can get the entire chassis tilted up so the bottom of the boards face the back of the set. You have to unsolder all 18 pins on each chip AND 4 metal pins on each heat sink--when you replace the chips(apply heat sink grease to them) the hard part is getting all the pins on the chips and the pins for the heat sinks lined up so they go back into the board.

Then holding a heat sink and chip in place solder each chip/heat sink back in.

IT IS A VERY GOOD IDEA WHEN YOU REMOVE THE CHIPS TO CHECK ALL THE DARK GREY RESISTORS AROUND THEM---most are 1.8 ohm 2 watt---they can be checked like checking a fuse--if one of them is open you will still have the same problem if you do not find and replace it---they are protect parts---if one is open--one of the chips got it.

After you replace you can go into the TECH menu and fine adjust the convergence--you can do the same in the customer menu but the TECH menu offers more places to adjust and saves these adjustments---I have instructions for getting into that menu if you need them.

If you can do the repair yourself you can save a lot of money as most shops get 300 or more for this type of repair--a pair of the chips can be bought on Ebay for about 12 dollars plus shipping.

If you have any questions or need advice reply to this posting here.

SD TECH

Sep 30, 2009 | Toshiba 43H70 43" Rear Projection...

2 Answers

Toshiba 42H83 projection TV red convergence issue


the Convergence Ics are STK392-110 ICs you can get replacement Ics at the following link and they provide free instalation instructions.
http://servicemanuals.vstore.ca/

Jul 03, 2008 | Toshiba 42H83 42" Rear Projection...

1 Answer

Toshiba 43h70 convergence


I've been getting parts lately from http://www.partstore.com/ and they seem to be reliable and trustworthy. The Part will probably only cost probably around $5-10 a convergence chip and a couple hours of labor.

Jun 21, 2008 | Toshiba 43H70 43" Rear Projection...

2 Answers

Changed my stk 392 150 ( both ) did not correct problem - HELP!


there are 3 low ohmage 2 watt resistors
for each stk chip, did you change those?
with-out those it may very well look worse!

Feb 12, 2007 | Toshiba 53H71 53 in. Rear Projection...

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