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820-000165 wont turn on

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  • 2informaticos
    replied
    Remove F7140.
    If short remains on L7130 side, then replace Q7130, U7100 and C7125.
    Be sure to have good trace from pin1/Q7130 to pin 24/U7100.

    Leave a comment:


  • Kyle93
    replied
    Pretty sure I killed the board by mistake. Replaced Q7130 since pin 1 was 0. Replacement Q7130 was not soldered properly and now there is a constant short to ground on F7140 as soon as Q7130 is soldered.

    Leave a comment:


  • 2informaticos
    replied
    "Pin 13 1.30V"
    Are you sure?
    It comes from SMC_RESET_L, which is not present in such case; unless R7100 is broken...

    Leave a comment:


  • Kyle93
    replied
    Came back to this board.

    Replaced ISL6250 and Q7010 again. PPBUS_G3H fluctuates between 2-4V now

    ISL measurements

    Pin 2 18V

    Pin 12 3.42V

    Pin 13 1.30V

    pin 14 0.882 V

    pin 9 0.34V

    pin 15 0.50V

    pin 17 1.75V

    pin 19 5V

    pin 20 5V

    pin 26 17.80V

    pin 27 18V

    Leave a comment:


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

    Leave a comment:


  • 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...

    Leave a comment:


  • 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 R/C7125 traces.
    Do NOT power untill check all traces OK.
    Last edited by 2informaticos; 08-24-2019, 04:40 PM.

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  • 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...

    Leave a comment:


  • Kyle93
    replied
    resistance 17/18 1.320

    Leave a comment:

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