Question about Samsung HCL4715W 47" Rear Projection Television

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Horizontal Output transistor

Hey, I am going to be replacing the horizontal output transistor but I am wondering if I could sub something else in. I am wondering if someone could tell me the base drive that the transistor has on it. I was looking at an IGBT that would work great if there is at least 10V of drive on the gate. If I could even get the schematic on that portion of the circuit that would be even better. Thanks

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  • Andrew Hawkins
    Andrew Hawkins Feb 04, 2009

    This one is very fast though, and the one I just found needs around 6 volts of drive.

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  • 27 Answers

IGBTs do not work well at high frequencies. They are not very linear, either. Even if it works, you'll likely wind up with a compressed and distorted picture.

Just put in an equivalent output transistor and call it a day.

Peace.

Marco

Posted on Feb 04, 2009

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Replacing horizontal output transistor


Many times, the only problem is hte transistor itself. There is really no way to determine whether or not additiona parts are required until the known defective one is replaced. If there are other symptoms once the transistor is replaced, post them here and we'll guide you to the defective parts.

Dan

Feb 05, 2009 | Samsung HCL4715W 47" Rear Projection...

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