Question about Toshiba 40H80 40" Rear Projection Television

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I am trying to repair my toshiba 40h80 convergence problem--I have the IC chips but found a bad resistor, the #on the board is R7716 the colors are black,black,grey,brown--I think. Can someone identify this for me?

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  • evolutionx Dec 10, 2009

    Thanks--were the colors correct? black,black,grey,brown?
    I checked them all and this was the only one open.

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  • 834 Answers

R7716 is a 2.1 ohm 20ohm is just fine at 1. watt Iwould check them all with your ohm meter usually there is one more 2 ohm that is open

Posted on Dec 10, 2009

  • Dave Naylor
    Dave Naylor Dec 10, 2009

    you god lucky ggod luck Merry Christmas

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1 Answer

Location of convergence chips in Toshiba 57H81.


hello if you can use a soldering iron you shouldn't have any problems but you will need to test the resistor in front of the ic and the capacitors at either end of the ic ! the ic usually located to the right hand side of the tv behind the tuner board connected to metal frame called a heatsink 2 big black chip good luck

regards
shaun

Mar 27, 2010 | Toshiba 57H81 57" 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 World.com,Tvrepairkits.com 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

I own a kp-51ws520 51 in rear projection hdtv-ready and the flash focus does not work. are there convergance chips in this set. If so what is the part number


If your colors are not lining up on the picture try to use the customer convergence menu to line up all of the colors.
If you try to adjust convergence with the flash focus, perfect focus, (depending on the make of your set) or by manual convergence and the lines will not line up or even move. What you might be experiencing based on this symptom sounds like a convergence IC problem.
I have repaired hundreds of these sets, so if you have any questions after reading the following, please reply to this post and I will help you in any way that I can.
With any Projection Television that has a damaged convergence problem, you do not want to continue the use of the set. If the IC’s continue to fail they will cause a short in the power supply and cause your television to not power up, and possibly damage the CRT’s in the set.

With that aside I have some support suggestions that I have put together that may help you make an informed decision.

You should be able to get a local service center to repair this at your house for between $350.00 - $450.00, If you want to repair this set yourself, I have some instructions below that will be a help to you.
While it is not a very hard repair, this repair can be a bit tricky


How do I tell if the IC’s are damaged?
When looking at the area around the convergence IC’s you see some resistors that have changed colors, or you test a resistor and it no longer reads the marked value. You will have to replace the IC’s and the supporting components.

When you remove the old IC's, please be sure to remove all of the old heat sink compound, as it can act as an insulation for the new IC's and cause them to overheat. I usually clean the heat sinks with alcohol and a small rag.


Where are the IC’s located and how do I find them?
There are two and large IC’s that control the convergence in a big screen set. Some of the newer sets only have one. If you only have one, it is right in the middle of the set on the center circuit board. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110.

Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.

If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.
Their site is
http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try
http://www.tvrepairkits.com/ .
Here is what they offer.
•OEM Sanyo Convergence Chips. These are genuine OEM Sanyo chips - Not generic ones. Sanyo was the primary supplier of convergence chips used in TV sets made by Philips, Sony, Hitachi, Panasonic, Toshiba, Mitsubishi, and many others)(2 per kit )
•Convergence Resistors
•Pico Fuses
•Thermal Paste
•Photo Instruction Manual - Complete Instructions on how to repair your TV. This is a step by step photo instruction quide that will walk you through the repair. (Download Version - PDF format allows you to view/print from your computer)
•Desoldering/Soldering Tips (Instuctions on how to solder )
•Email/Phone/Live Chat Support


I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.

Thanks for using FixYa
asnowman


I have attached some photos of really bad convergence problems; your picture may not be exactly as bad as these.


c56dbfc.jpg
929d14b.jpg

Dec 07, 2009 | Sony KP-51WS520 51" Rear Projection...

2 Answers

I can not get the convergence to adjust?


Your symptom sounds like a damaged convergence IC.

This is a common failure for this particular television.

There are two and large IC’s that control the convergence in a big screen set. Some of the newer sets only have one. They are secured to a very large aluminum heat sink2.gif. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).

Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.

I would suggest that you contact a service center in your area for a complete diagnosis and repair, as this type of repair can get a little tricky. But if you want to repair the set yourself, just remember to be careful. The capacitors and CRT’s can hold a charge and may shock you.


If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics2.gif in California, they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.

I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.

Oct 03, 2009 | Toshiba 40H80 40" Rear Projection...

1 Answer

Convergence Problems/Toshiba TP50F50/51 50 in. Rear.


yes, but make sure you get the parts from a reputable seller.. They do have knock offs as well as chips that didnt pass the full test sold cheap which will work temporarly and then fail again.

Sep 02, 2008 | Toshiba TP50F50/51 50" Rear Projection...

1 Answer

Replacing Convergence IC's, I found a bad resistor needing replacment


They are both 1.8 ohm 1watt fusible resistors. Metal film 5% 1.8 ohm 1watt will substitue them

Aug 08, 2008 | Toshiba 50H71 50" Rear Projection...

1 Answer

Convergence problem- right side red out?


As long a the picture is not bowed you may have a convergence module bad or have to enter convergence service menu to adjust If bowed at all the convergence ic's are bad or just a resistor in the convergence circuit is out of its value. These are possibilities but it still could be the ic's

Jan 02, 2008 | Toshiba 40H80 40" Rear Projection...

2 Answers

PT-53WX52


Your TV most likely has a Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • 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.
701cb04.jpg
77ea520.jpg
f0900cb.jpg

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together convergence repair kits for most models.

The kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, etc. Everything you will need to do the repair yourself.

Dec 02, 2007 | Panasonic PT-53WX52 53" Rear Projection...

1 Answer

Problem with green color


One of your convergence IC's has burned out and needs to be replaced. If the green color is sagging from the top or bottom then the IC that handles the Green Vertical (GV) is bad, and if the green has moved inward on the left or right sides then the IC that handles the Green Horizontal (GH) is bad. Toshiba projection TV's typically use the STK392-110, and it is a good idea to go ahead and replace both IC's with the updated STK392-150's. If you do not have experience replacing convergence IC's then have a qualified tech handle it for you.

Jul 02, 2007 | Toshiba 40H80 40" Rear Projection...

2 Answers

Color Problems


need to replace 2 stk392-110 convergence ics

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

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