Question about Toshiba 57H82 57" Rear Projection Television

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I replaced the two STK IC's but now I don't have a pic or sound at all.

Hello. I have a Toshiba 57H82, I reciently replaced the two STK IC's hoping to fix a comvergence problem but I ended making it worst, After I placed the new IC's and conected everything back together, I had no pic or sound, I only hear the click then the red led turns on and remains on like if the tv is on but there is no pic or sound. I hope you can help me, what should I try now? do you have a copy of the service manual? I'm really looking forwad to hear back from you since my kids have no tv at all for now at least for the past week the had a distored pic to whatch but now not even that. By the way one thing that my be part of the problem is that I put a thick layer of heat sink compound on the new IC chips and I don't know if it's ok or did it suposed to been a very light layer, Does the back of the IC need to have contact with the cooling wall? well I'll wait for your advice before I try anything else. Thank you very much in advance for taking the time to help us, and also thank you for been so specific and descriptive on your coment because it makes it easier for us to understand the things we can try to do to solve our problems. Have a great day and again, Thank you.

Gilberto Gonzalez
mrlilsnoopy69@yahoo.com

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Gilberto,
Is it actually convergence that was out?? This particular model has a hyper module that can go bad causing video distortion but usually not just bending the blue, red, & green light like a convergence problem...
The Hyper board is a standup-up board on the left looking into the back of the TV, located behind the jack panel plug-ins. It has a metal cage around it and inside that are several 10mf/16v caps that go bad... Their board locations are:
Cx261
Cx230
Cx270
Cz52
Cx178
Cx221
C514
Cx250
Cx670
Cx241
Cx541
The board is no longer available so techs simply rebuild those boards using mini radial camcorder caps.
If you're dead sure it's only convergence I'd say to check the amps over again and take an meter to check the yoke return resistors. One or more may be out of value feeding the amps.
Anything else let me know...

William Rayburn, CET
Premium Technologies
premtech@willapabay.org

Posted on Jun 30, 2008

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1 Answer

Doesn't diplay


Check for solder bridge along the convergence ic's. Check low value resistors in the circuit. Make sure you have your +27 and -27 vcc going to the ic's.

Nov 20, 2011 | Toshiba 57H82 57" Rear Projection...

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I replaced the stk's on my toshiba 57h82,now my tv looks scrambled until it warms up. I need to find ou what capacitors/values I need to look at. Can anyone help? Thanks Steve


Your hypermodule has gone out and will need to be repaired. You can google for the capacitor locations - I beleive its 11 of them. This is a tricky repair since the caps are small. If you do it yourself I would advise using small cam corder capacitors instead of the SMD type that installed. This will make it easier to replace. You can also get a complete kit with instructions from www.TvRepairKits.com or similar sites.

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Convergence prob on toshiba mod 57h82...is stk 392-110 ic interchab=ngeable with stk 392-150 ic...what's the difference


No. If you already tried, you already know why. Repair on TVs require the exact parts. If you feel you can repair this, the suggestion is see the website,www.TvRepairKits.com. Here they can instruct very throughly. You will find photos to see what you will be working on. I have repaired several TVs using this web. Be sure you have the model number and the symptoms you describe. If you have any further questions concerning repair, ask me here. Thanks for asking and show a few hands of support.

Mar 10, 2011 | Toshiba Televison & Video

1 Answer

The colors are not matching up it will not allow auto focus or manual, the red line is not straight? Toshiba 57H82 rear projection t.v.


The convergence circuit has failed in the tv. These are the big STK chips on the circuit board. It typically costs $300 to fix at a TV service center. Requires replacement of two STK chips, some resistors, some fuses and then re-alignment of the CRTs within the service menu.

If you have proper soldering tools and can download the service manual, it is possible to do the repair yourself.

If you do not have any electronic background whatsoever, I do not recommend a person to attempt it.

Feb 15, 2011 | Toshiba 57H82 57" Rear Projection...

1 Answer

STK IC CHIP 392-110


I made the same repair in a Toshiba 42h81 I replaced the STK 392-110 and after a lot of searching found the cheaper ones last 6 month or so be sure to use Sanyo IC's and replace the resistors with them when the IC's let go they take the resistors out I posted my repair On my page if it will help you dennisgm052.weebly.com

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1 Answer

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(6) 1.8 ohm 1watt metal film resistors for R7711, R7716, R7721, R7726, R7731 and R7736 yes the STK 392-150 will work fine.

Sep 24, 2008 | Toshiba 57H82 57" Rear Projection...

2 Answers

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http://servicemanuals.vstore.ca/

Aug 06, 2008 | Toshiba 57H82 57" Rear Projection...

2 Answers

Toshiba 57H82 resistor value???


When I get to work in a few hours, I will get the value for you.
Yes,you can use a regular 1/4 watt resistor and you might be
able to measure the value of it's twin in the other IC circuit....T.

Jan 21, 2008 | Toshiba 57H82 57" Rear Projection...

1 Answer

57H82 convergence issue, but not STK IC


There are probably eight to ten resistors sitting behind the heat sincs the Chips mount on. You will need an Ohm Meter the easiest way to check them is just compare them with one another, you will see a pattern then you will see one that is really high or open (infinity) that is the one to change check the coor code on it to be sure you replace it with the right size

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