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Lenovo E480 no sign of life

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    Lenovo E480 no sign of life

    Hello have this Lenovo E480 that after storm wont work
    NM-B421

    two chargers USB-C dont give me voltage. so i cut one and with cable connect my source and see 2.7W steady. Found hot area near power connector with burning resistor. it is so tiny that i cannot see its value

    when connect charger on one side of this resistor is 20V on other side is pulling down to ground by Q4202

    If anybody have schematic, share on schematics page
    Attached Files
    Last edited by ktmmotocross; 07-03-2020, 09:54 AM.

    #2
    Re: Lenovo E480 no sign of life

    no free schematics available..all are paid.. anyone care enough to share their schematics..?
    Last edited by SMDFlea; 07-04-2020, 05:01 AM.
    Never stop LEARNING because life never stops TEACHING!

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      #3
      Re: Lenovo E480 no sign of life

      we have some good guys like SMDflea that share this schematic

      https://www.badcaps.net/forum/showthread.php?t=85795
      Last edited by SMDFlea; 07-04-2020, 06:54 AM.

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        #4
        Re: Lenovo E480 no sign of life

        in schematic i dont see any ID pin but in cable there is wire for it.

        Anybody know how this USB-C charger work? i have new charger, why it dont give voltage?

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          #5
          Re: Lenovo E480 no sign of life

          Google search "NM-B421 VSYSTEM2" ,you`ll find some posts on chinafix and elvikom. USB-C is still a mystery to me.
          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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            #6
            Re: Lenovo E480 no sign of life

            Originally posted by ktmmotocross View Post
            we have some good guys like SMDflea that share this schematic

            https://www.badcaps.net/forum/showthread.php?t=85795
            thanks;;; salamatski...
            Never stop LEARNING because life never stops TEACHING!

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