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Thread: I need some help badly guys, don't want to trash it...

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    Blind Shooter addicted2dunes's Avatar
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    Default Re: I need some help badly guys, don't want to trash it...

    Quote Originally Posted by heima View Post
    Thank you addicted2dunes. Maybe we found our culprit. Checking the bridge rectifier, you should have gotten 4 good diode values, but you only got 2, so this means two diodes are bad. I am sorry but I have to ask you to desolder the bridge rectifier from the circuit board and check it again. Here is a picture of what is inside a bridge rectifier.
    bridge.jpg
    by this design, if any two adjacent diodes were bad, then no power would get out. If any two opposite diodes were bad, then power could get out, but in that case, the power is pulsed.

    Maybe we found the troublemaker. Damn I hope that is it.
    Radio Shack sells a lot of different bridge rectifiers online, but in the store, this one:
    25A, 50V Full-Wave Bridge Rectifiers : Rectifiers | RadioShack.com
    or this one:
    RadioShack 8A/400V Full-Wave Bridge Rectifiers : Rectifiers | RadioShack.com
    or this one if you bend the legs to accommodate the circuit board:
    4A, 400V Full-Wave Bridge Rectifiers : Rectifiers | RadioShack.com
    should work for you.
    The problem is the physical size of the bridge rectifier. But I am jumping ahead, we still need to get the old bridge rectifier desoldered off and verified it is bad. If it is bad, there might be some printing on it that will tell us what voltage and current values it is designed for.
    Fingers and toes crossed here...
    Hmmm... desoldered and removed I think it may be good?

    .0
    .0
    .539
    .572
    .555
    .590
    0
    0

    Oh, and the only marking on it is: + w/ a circle around it, 2B 2.C
    And it's made by Toshiba
    Last edited by addicted2dunes; 09-20-2013 at 06:48 PM.

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