E1-772g Not powering on and not charging

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  • questore
    Badcaps Veteran
    • Dec 2015
    • 564
    • 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.

      Comment

      • questore
        Badcaps Veteran
        • Dec 2015
        • 564
        • 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

          Comment

          • questore
            Badcaps Veteran
            • Dec 2015
            • 564
            • csongrád
            #23
            Re: E1-772g Not powering on and not charging

            Help!

              Comment

              • questore
                Badcaps Veteran
                • Dec 2015
                • 564
                • 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.

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