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  1. #1
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    Disassembling a (Chinese knockoff) MagicShine - how to remove the heatsink?

    Looking at some images online, this unit is very similar in construction to the MagicShine SSC P7. But, being a $24 knockoff... it broke. Well, it's not broken per say... just doesn't work. Okay, it's broken. The light cuts on and off - wiggling the wire at the head unit and holding will keep the light on. So, the problem is in the head unit.

    I've removed the base, the bezel and reflector. Now, I've got to unscrew (I think) the heat sink retainer ring. But, how? There's no (obvious) way to grab the thing - and it seems to be in there kinda tight.

    Tips? Ideas (other than stop buying Chinese knockoff crap)

    Thanks.

    Mountain bikers who don't road ride are usually slow.
    Roadies who don't mountain bike are usually d***s.

  2. #2
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    Usually there are a couple of indents on the retaining ring, use needle nose pliers or similar to turn it. Got a pic of the ring?

  3. #3
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    Didn't see any notches or indentations... that spot in the left side of the pic (at about 9:00) is a scratch

    Mountain bikers who don't road ride are usually slow.
    Roadies who don't mountain bike are usually d***s.

  4. #4
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    If you exhaust other options I'd look at drilling two holes in the ring (180 deg apart) so that you can use needle nosed pliers or retaining ring pliers to try to untwist it.

    John.

  5. #5
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    Drilled two holes and used needle nose pliers as retaining ring pliers and it came right out... and there was the red wire hanging loose.

    Thanks for the help guys - John good call on the holes.
    Mountain bikers who don't road ride are usually slow.
    Roadies who don't mountain bike are usually d***s.

  6. #6
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    Happy to hear it worked. Was it threaded in place or just pressed in?

    John.

  7. #7
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    It was threaded in. Nice piece of machined aluminum. I have no idea how they threaded it in. My challenge now is separating the board from the base - so I can reattach the red wire.

    Mountain bikers who don't road ride are usually slow.
    Roadies who don't mountain bike are usually d***s.

  8. #8
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    If it's what I think it is, the driver board is at the bottom, possibly glued or pressed in to the base (if it's aluminium as it looks I doubt it's "soldered" in).

    You might be able to use a dremel around the edges of the board to get enough relief to pull it out and back. If it's glued a heat gun may do it but don't know how much damage the heat will do - would want to take it easy.

    If the wires from the led to the driver are short you may have to unsolder them at the led in order to get enough slack to pull the board back.

    The negative wire on the led looks to be bare - could just be the photo - I'd be a bit concerned about that.

    John.

  9. #9
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    Just to be clear if you use a dremel don't grind the board, grind away the edge of the aluminium that holds it, just enough to remove the board. You can use a thermal epoxy/glue to put it back in place once it is repaired.

    John.

  10. #10
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    could you meassure the diameter of the block where the led sits and the other diamether of the deflector?

    because i am planing to convert it's base to my leds cree xm-l2 3x with a smaller deflector

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