Question about Toshiba 40H80 40" Rear Projection Television

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40h80 stk 392-110 ic

Where are the ic in this set and are they soldered in and is the a easy fix I don't want t pay 400.00 to have it fixed the bule is out of and can bring it back but will move up and down thanks Tom

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  • william cosentino May 11, 2010

    can you check for typos and please don't abbreviate for "ic" and such and i will be glad to help> :)



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They are located on the signal board in that chassis they are side by side on two large heat sinks

Posted on Jun 18, 2008


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Toshiba 40h80 red light blinking

I would suspect the problem is in the convergence circuit---only one simple way to know---get at and un-solder all 18 pins on both the STK chips it uses.

Once they are free try to turn set on--if it comes on one of the chips is bad and both will have to be replaced.

Dec 05, 2012 | Toshiba 40H80 40" Rear Projection...

2 Answers

Double image

If you can solder, yes this is not a hrd fix my friend. Inside this set, standing up, will be two square black IC's up against a large metal piece called a heat sink. These two convergence amp IC's need to be replaced. They are called STK-392-040. You can get the parts from here: Do not forget though to get heatsink compound to install on the backs of the new IC's before you replace them. If you do not have the skill to solder and unsolder, see if a friend can assist you who does, like I said you can buy everything you need for less the 100 bucks. one more bit of advice. You do not want to order any cheap 10.00 replacemnet IC's as they are generic and do not meat the manufacturers specs. Buy only good quility parts or you will be in the same boat in a few months. Good Luck

Jun 28, 2007 | Samsung PCL5415RB 54" Rear Projection...

1 Answer

I changed my two IC chips and three resistances on my Hitachi TV to fix color alignments. Now the problems is that yellow and blue double image are seen at the bottom of my screen with no much effect on...

Ur tv still have dead resistors parts,test all 12 resistors parts around the 2 STK convergence ICS and changes some more dead resistors parts or changes all 12 resistors parts for sure.If tv still have the same problems after tested and replaces more resistors parts or all 12 resistors parts.Than some how when u handling and replacing the 2 STK convergence ICS and resoldering the 2 STK covergence ICS u short it out the 2 STK convergence ICS by resoldering without proper grounding ur self not to allow for static electricity to kill the 2 STK convergence ICS or u using a soldering iron to high of a wattage for doing soldering ICS work.

Apr 23, 2011 | Hitachi 43FDX01B TV

2 Answers

Color will not match up

if your talking about the sets convergence does not line up and it looks like a 3-D picture than The best advice I can tell you at this point is to go to and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! Go to
The kit comes with original Sanyo STK IC'S , not those cheap aftermarket or china made IC'S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases GOOD LUCK!!!
Larry Dillon.

May 08, 2010 | Hitachi 51UWX20B 51" Rear Projection...

1 Answer

My tv toshiba 40h80 the red and yellow line up but the blue doint it moves up down but i caint get them to line up with the reds and yellow.

Ur convergence is dead.U must know how to solders?Must replaced 2 STK convergence ICS and some or all it resistors.Tries Websites Tv repair, to buy a convergence kit to repair it ur self.The shop will cost U $300 for parts and labors.

Mar 19, 2010 | Toshiba 40H80 40" Rear Projection...

1 Answer

Mitsubishi vs5043 convergence

Your chassis is a VZ3 that chassis should use two STK 391-020 ICs Its an easy repair Mitsubishi usually will not blow resistors when the ICs go out. You can get the replacement ICs at the following link and they provide free step by step instructions with pictures so if you have even basic soldering skills this isa job you can do in about 30 minutes . Heres the link.

May 07, 2008 | Mitsubishi VS-5043 50" Rear Projection...

1 Answer


Next step should be to check the fuse-resistors and low values resistors for open conditions as well the solder joints on them.
These parts are located near the STK ICs.
Also if you can measure the voltage that power up the STK's. If you do not have the schematic diagram, check the ICs data sheet to know where the voltage is getting to the ICs.
You may have to do the convergence adjustment manually after you replaced those parts.
Good Luck.

Mar 10, 2008 | Televison & Video

2 Answers

Arched or bowtie effect

You have bad convergence Ics they are mitsubishi part # 267P150010 Generic part is STK 392-570 and they are at locations Ic8c01 and Ic8co2 on the deflection board. If you can solder you can take these out replace them and fix your problem for about 100 dollars. Best of luck


Feb 08, 2008 | Mitsubishi WS-65819 TV

2 Answers

Color Problems

need to replace 2 stk392-110 convergence ics

Apr 07, 2007 | Toshiba 40H80 40" Rear Projection...

1 Answer

40H80 Problem TV will not switch to non antenna inputs

Sounds like you have a bad tuner. It is not uncommon for solder joints to deteriorate over a period of time and loose continuity. If you are handy with a soldering iron, you can try to fix it yourself but I really recommend leaving it to a professional.

Dec 06, 2005 | Toshiba 40H80 40" Rear Projection...

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