E1-772g Not powering on and not charging

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  • questore
    Badcaps Veteran
    • Dec 2015
    • 466
    • csongrád

    #21
    Re: E1-772g Not powering on and not charging

    Q8302 is shorted to ground just I suspected, thats why theres is no 1.35v so obviously no power for +VCORE. tomorrow I remove it to see whats next.
    As I see schematics there is 2 mosfet connected the same way so maybe Q8303 can take its place while I order a new one and i can go further if there is more problem.

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    • questore
      Badcaps Veteran
      • Dec 2015
      • 466
      • csongrád

      #22
      Re: E1-772g Not powering on and not charging

      removed Q3202 something not right around DDR voltage chip.
      - S3 and S5 seems fine 3.3v
      - V5IN is fine 5.04
      - DRVL 0v
      - DRVH 0.1V
      - SW 0.1V
      - all resistors seem to be fine around it

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      • questore
        Badcaps Veteran
        • Dec 2015
        • 466
        • csongrád

        #23
        Re: E1-772g Not powering on and not charging

        Help!

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        • questore
          Badcaps Veteran
          • Dec 2015
          • 466
          • csongrád

          #24
          Re: E1-772g Not powering on and not charging

          Originally posted by questore
          removed Q3202 something not right around DDR voltage chip.
          - S3 and S5 seems fine 3.3v
          - V5IN is fine 5.04
          - DRVL 0v
          - DRVH 0.1V
          - SW 0.1V
          - all resistors seem to be fine around it
          Sorry removed not Q3202 but Q8302.

          Comment

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