Question about Toshiba 57H81 57" Rear Projection Television

7 Answers

Toshiba 57HX81 I have a Toshiba 57HX81. A few months ago i noticed the top of the screen had distortion (vertically....straight vertical lines appeared wavy). It would go away in a minute or two. It has progressed over the months to make the TV unwatchable at first because of the wavy flickering distortion across the whole screen. It takes 30-40 minutes to "warm up" until the distortion is unnoticeable. If you turn the TV off for even a few seconds and switch back on, the top of the screen gets the waves back, although not nearly as bad as the initial turn on. I look forward to any insight you have. Thanks.

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  • drinfl Mar 06, 2008

    Thank you for responding to my inquiry. Being a laymen how would I go about adjusting the power supply? I have the repair manual and was unable to locate any data regarding the adjustment of this component? Would there be any other potential components that could allow for my current condition (i.e. capacitor, etc.)? Thank you again for your assistance!

    Regards
    Dan

  • drinfl Mar 06, 2008

    Thank you for your suggestions. I had disconnected all attached components with the exception of the cable line. Based on your bullet regarding the cable section, my problem occurs on all stations and as noted in my original posting corrects itself by apx. 95% after an average 30 min. warm up. Any other suggestions would greatly appreaciated!

    Regards
    Dan

  • drinfl Mar 06, 2008

    I have a Toshiba 57HX81. A few months ago i noticed the top of the screen had distortion (vertically....straight vertical lines appeared wavy). It would go away in a minute or two. It has progressed over the months to make the TV unwatchable at first because of the wavy flickering distortion across the whole screen. It takes 30-40 minutes to "warm up" until the distortion is unnoticeable. If you turn the TV off for even a few seconds and switch back on, the top of the screen gets the waves back, although not nearly as bad as the initial turn on. I look forward to any insight you have. Thanks.

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7 Answers

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Hi drinfl,

If I may add and with the indulgence of ser71 and melnavz....

From my understanding, this particular problem is pretty common in some Toshiba models of RPTVs. This could either be a simple voltage double problem or a tricky Hyperboard repair/replacement. Toshiba has acknowledge the problem and has posted a Technical Bulletin affecting repairs. This might be of help to you.

As common also, component and boards are a bit difficult to order and normally takes a couple of months. You may want to try and seek the services of a qualified professional specifically those who are willing to do (and knowledgeable of) component level repair. Alternately, you can also try to have the board/component in question rebuilt or substituted with a comparable replacement (by another manufacturer). Either way, this site might be of further help to you.

Hope this be of additional help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Mar 06, 2008

  • Louie  Role
    Louie Role Mar 06, 2008

    Oooops,

    Sorry guys for doubling/tripling ups. Regards to all.

  • Louie  Role
    Louie Role Mar 08, 2008

    Hi again drinfl,

    Any development(s) with your unit?

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The problem is the hypermodule... JUST repaired one at the shop.. The hypermodule is baisicly the signal processor for these sets.. Toshiba has a bulliteen to service center about this... i am 99.9 percent certain of this The is a cuircit board in this unit that has bad capacitor on it. THe solution is too replace these 11 10 microfared capacitors. very very tricky i would not sugest this for a non tech,, soldering these are hard for experence tech. but it can be fixed. Like i said toshiba has posted this repair to there service tech and works every time

Posted on Mar 06, 2008

  • Willie Howell Mar 06, 2008

    this is the hyper module with the small caps on it

  • aaron mocco Jan 02, 2011

    where are they in the pic and how do you change them?

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Look for bad stk's on convergence module. This may take care of pincushion too.

Posted on Mar 06, 2008

  • micromaster
    micromaster Mar 06, 2008

    The problem was in the convergence amps. stk's.

  • micromaster
    micromaster Mar 06, 2008

    This is not rare toToshiba TV set.

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If it is due to unstable power, there may be an easier way to fix it that doesn't involve an actual repair to the computer. Power fluctuation's are likely caused by the power coming into the TV - I have that problem at my house. A good way around that is to get a UPS designed for a computer. It doesn't have to be a big one. A true UPS has a battery in it. Whatever you plug into it runs off the battery, and thus gets a steady, very well regulated flow of power. And the battery is constantly charged from the power outlet. If it's power fluctuations causing it, hooking the TV up to a UPS will take care of them.

-Dyllan

Posted on Mar 06, 2008

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Sound like convergence problem. Is there anyway you can take a picture of what it's doing and post it here?

Posted on Mar 06, 2008

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Hello!

The input voltage of the TV is not stable at start. this become stable when the TV is warm up. Please try regulate your power supply to have the correct supply in onto the TV. else you need the service tech to adjust setting inside the TV. this is sensitive it hard you to adjust by your self. this maybe cost you cheap.

may this help, best regards,melnavz

Posted on Mar 05, 2008

  • Emelio Navaja
    Emelio Navaja Mar 06, 2008

    Continue bro!

    Benimur



    That's your turn, I admit that you are pretty good than us. So keep it up!

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As with all products that contain a digital display, in rare instances, when viewing certain content (e.g.. television broadcasts, video games, DVD), you may notice that the sound and picture are slightly out of sync. This phenomenon can be caused by various factors including, without limitation, video processing within the TV, video processing in an attached gaming system, and video processing/different compression rates used by broadcasters in their programming. You may want to try one or more of the following suggestions, which may help to reduce the effect of this phenomenon:

  • If the TV is connected to an external A/V device (e.g., DVD player, video game system, set-top-box, etc.) always try to use the Color Stream video jacks and corresponding audio jacks or the HDMI input (if available on your TV) for connection to such external A/V device.

  • If the TV is connected to an A/V receiver that has a programmable audio delay feature, use this feature to help synchronize the sound to the picture.

  • If connected to a video game system and your TV has the Game Mode feature (see owner's manual for more information), enable this feature.

  • If you notice this phenomenon only on certain TV channels, please contact your local broadcast, cable, or satellite provider to inform them of this issue.

Posted on Mar 05, 2008

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Hello!

That can be repaired, the vertical and the horizontal that regulate the voltage towards the projection maybe lessen or fulty. you can let the service man/service center repair this. these not much cost you, that is very cheap part and a minimum labor cost.

melnavz

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hi
You are experiencing a lack of vertical deflection or vertical collapse. Since it will come back the first thing I would suspect is “ring cracks” in the solder joint in the vertical circuit, mainly the vertical IC. These suspect solder joint can be re-soldered and the television set repaired.
I would suggest that you contact a local servicer. If you are repairing the set yourself, be careful, there is always a risk of shock when dealing with electronics.
OR
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OR

chek this site,i blieve u will b helpfull
http://www.dshosu.com/how-to-fix-toshiba-rear-projection-hdtv-wavy-lines/

regards

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