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Help replacing surface mount capacitors

Discussion in 'Electronic Repair' started by Tom, Jan 19, 2004.

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  1. Tom

    Tom Guest

    How do you read surface mount electrolytic capacitors, they have these
    numbers on the top:

    220
    CHA
    7C7 (big ones)

    47
    165
    7Q7 (medium)

    2.2
    HHA
    7K1 (tiny)

    Does anyone know what these mean?

    Also I am having trouble unsoldering them, they seem almost 'welded' to
    the circuit board.

    Can I pull/cut them off somehow and solder new ones in their place? Is
    there any way to test them while they are still on the circuit board? I
    have a meter but it is designed for the capacitors (with long legs) to
    be pushed into it, If I made some leads would it be possible to measure
    them on the board with this?

    Thanks, Tom
     
  2. Guest


    You could make leads and test them. I've personally never encountered
    a bad surface mount cap. The cap could be glued down ( a hint for
    reinstalling them, btw)

    -Chris
     
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