Aclu9/aclu0 wont turn on

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  • maurovalero
    Senior Member
    • Sep 2018
    • 69
    • colombia

    #1

    Aclu9/aclu0 wont turn on

    Hi comunity, this lenovo wont turn on, i detect ic pu301 broken, and pin 1 and 2 are referred to ground, I already removed the caps from pins 1 and 2 but the reference to ground is still present someone can help me, pq 302 have pin 1-3 20v pin 4 5v when pj301 is open but when close it pin 4 take 19,5 v and 6-8 are referred to ground
  • Techtiger
    Badcaps Legend
    • Oct 2014
    • 1601
    • france

    #2
    Re: Aclu9/aclu0 wont turn on

    The broken IC BQ24737 did you change it? When you open the jumper the 2nd Fet is switching Drain side you get +20V? When you close the Jumper PQ302 Gate 19.5V meaning your protection circuit active check the 3caps and PQ311 for any short
    Last edited by Techtiger; 11-30-2019, 12:46 PM.

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