Question about Toshiba 61H70 61" Rear Projection Television

4 Answers

Toshiba 61H70 Projection

Our neighbor wanted to get rid of his 2 year old rear projection. Having worked on these in college I thought I'd put my solder iron to work and get lucky. Well, I did get lucky but this set seems destined to the dump.

Does anyone out there know where I could send the boards or obtain refurbished boards for it?

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  • lhcsmi Jul 24, 2008

    I am not a professional television repair person; I'm good at replacing boards and/or parts that someone says are likely the root cause of the video problem I have.

    Let me reiterate the problem with this set:
    No Video. Prior to this it had video that would come and go by tapping near the coax input area. We soldered many connections and had it down to a certain board then one day it went out completely. We get the blue screen and menu screen fine and volume, high voltage seems to be there, just not the video no matter which input we use.

    Which board should we replace or send in for service? Where would we purchase a board and/or send ours in for service? Which part(s) typically go bad in this model based on our no video issue?

  • lhcsmi Jul 24, 2008

    We would prefer to find a reputable company that does an exchange and/or repairs Toshiba circuit boards at a responable price. And ideally someone who has knowledge of typical parts that fail and/or mods in this model rear projection unit with details about which components to test with an volt / continuity or diode meter and which parts to purchase / solder in, etc. We purchased a real service manual and ideally we would like page numbers to review with hotspots to test / replace.

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Since the menu etc seems to appear correctly, there is no convergence problem. You will need to perform a couple of tests to help me isolate the problem:

1) Try using an AV input (Video 1 for example). Does the picture appear correct?

2) Select a known strong channel. Any picture at all or just blue screen?

The menu is generated late in the video path before all of the convergence etc. The AV inputs bypass all of the RF nonsense that is handled by the tuner. Once we narrow down the probable circuits, we can start looking for specific parts that may be defective.

Please try the experiments listed above and post the results.

Thanks,
Dan

Posted on Jul 25, 2008

  • ABRsvcs Jul 28, 2008

    Based upon your latest update, I think that the problem is more a connection problem than anything else. Look closely at the connections on the board with the tuner. You may find a poor solder connection close by the tuner itself. Resolder any connection that appears grainy or has a ring. Start there and let us know what happens. This problem should not require many parts if any.



    Dan

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Certainly, I can help you. I would recommend going to the following link and getting the service manual so you can see first hand disassembly instructions and testing procedures. Its only 10.99 and they email it to you shortly after purchase. The manual is a valuable resource as it will have part numbers in case you do need a new KD board or refurbished boards which is available on ebay . heres the link.


Posted on Jul 24, 2008

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Check this website to get the parts for your TV. I will find the service manual and give more instructions about the board that will need to be replace.

Posted on Jul 24, 2008

  • Jaime Hernandez Jul 24, 2008

    If you already have the service manual, it just a matter of locating where the video section of the TV and measure the voltages that appear in red and if you have an oscilloscope you can verify the waveforms as well.

    Base on how the TV was working before re-soldering, would suggest to check very carefully for shorts and even a connector not seated properly.

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Click here..

this could be helpful for you

Posted on Jul 24, 2008

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Would you like a digital, searchable, pdf version of the Toshiba 61H70 Projection Television User Guide?

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I hope that helps.
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