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820-000165 wont turn on

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  • 2informaticos
    replied
    Post again voltages for U7100...

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  • Kyle93
    replied
    no short between R7120 and L7130

    All traces good for CHGR_PHASE; to U7100, C7125, L/Q7130

    PPBUS_G3H currently .510V

    Leave a comment:


  • 2informaticos
    replied
    Check for short between R7120 and L7130.
    Be sure to have ALL traces good for CHGR_PHASE; to U7100, C7125, L/Q7130...

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  • Kyle93
    replied
    Yes, checked traces with meter

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  • Kyle93
    replied
    As far as I know Q7130 should be good. Pulled it from donar board,

    0.141 diode mode now on F7140. All traces look good, no liquid damage on this board. History is store claimed board was working fine and that it just suddenly died.

    Waiting for response if I should check anything else before I power board again

    Leave a comment:


  • 2informaticos
    replied
    Did you change Q7130 with good one?
    After change it, check diode mode on F7140 before powering the board.
    As above mentioned, be sure above R/C7125 traces.
    Do NOT power untill check all traces OK.

    Leave a comment:


  • JohnB8812
    replied
    I've had one like this before. It could very well be an internal board short which would be hopeless

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  • Kyle93
    replied
    when checking R7150 noticed have 0.003 short to ground. When Q7130 is removed short is gone but once Q7130 is replaced and soldered back on short returns.

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  • Kyle93
    replied
    replaced and checked R7150/51/52 and checked traces. All are good but still same results

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  • 2informaticos
    replied
    "pin 9 3.4V"
    This is the result of
    "resistance 17/18 1.320"
    So check R7150/51/52 and their traces to U7100...

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  • Kyle93
    replied
    resistance 17/18 1.320

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  • Kyle93
    replied
    changed Q7180 and checked R7121/22 and R7180/81/85/86. All values are good.

    pin 14 3.4V

    pin 9 3.4V

    pin 17 1.636V

    pin 27 0v

    Leave a comment:


  • 2informaticos
    replied
    "pin 14 1.3V
    -----------------
    pin 9 0.36V
    --------------
    pin 17 1.75V
    ------------
    pin 27 0V
    --------------
    resistance 17/18 23"
    All bad values.

    Change Q7180 and come back with news.
    Also check R7121/22 and R7180/81/85/86.

    Leave a comment:


  • Kyle93
    replied
    0.7 L7130

    U7100 pin 2 18.25V pin 12 3,4V pin 13 3.2V pin 14 1.3V pin 9 0.36V pin 15 0V pin 17 1.75V pin 19 5.10V pin 20 5.10V pin 26 0V pin 27 0V

    resistance 17/18 23 27/28 20.8

    yes amber light on charger

    Leave a comment:


  • 2informaticos
    replied
    Resistance to ground at L7130?
    Post other voltages for U7100; pins 2, 12, 13, 14, 9, 15, 17, 19, 20, 26, 27.
    Check resistance between pins 17/18 and 27/28.
    Do you get amber light on Magsafe?

    Leave a comment:

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