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Thread: X10 CM12 burned resistor (R1) - replacement resistor value needed...

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  1. #1

    Default X10 CM12 burned resistor (R1) - replacement resistor value needed...

    ab1, long time listener, first time caller..

    I have an old CM12 which I've bought on eBay (condition was always a little questionable). Anyway, it worked for a few weeks and then stopped.

    I opened it up to find the (balancing?) resistor R1 next to the big 0.22uF 273V capacitor to be completely burned out.

    I'd like to try and replace it to see if the unit still works.

    Does anyone with a multimeter have one of these open by any chance and could measure the resistance of R1 for me?

    Based on my limited understanding of electronics, this resistor should be somewhere in the region of 1K Ohms.


    Many thanks!

    --ab1

    (pics attached)IMG_1503.jpgIMG_1505.jpg

  2. #2
    Automated Home Jr Member
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    Sorry for not replying to this sooner.
    It's 100k 10%, and actually measures 102k on mine. It's one of those old 1/2w carbon composition ones; presumably it's got the mains across it or something.

  3. #3

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    Awesome, thanks a lot - will give that a go!

    -- ab1

  4. #4
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    did it work?

  5. #5

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    Quote Originally Posted by andy_p View Post
    did it work?
    Unfortunately not. I poked around with the multimeter and it seems there was also burned transformer(s) and probably other things. So I binned the whole lot and bought a new one

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