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Clevo N850HK and P2808

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    Clevo N850HK and P2808

    This clevo came with a pch in short and a PQ25 very hot (this mosfet is ok and I have 3.5 Ohm PL10 VCORE ??? see pag. 97), after removed it I'm waiting to order a new one because I'd want to check for other issue.
    1) No VDD5 , caused by missing signal DD_ON, reading the power sequence pag. 112 this signal should be present, it is generated by U26 pag. 93 (P2808 http://www.datasheetcafe.com/p2808-d...controller-ic/) , on it I read:
    1-19V 2-19V 3-19V 4-0V 5-0V 6-3.3V 7-0V (DD_ON) 8-19V
    if I remove Q49 (A-B) I exclude DD_ON and VDD5 increases to 5V.
    2) 3.5 Ohm on VCORE is too low ?
    thanks
    Attached Files

    #2
    Re: Clevo N850HK and P2808

    I'm not sure if p2808 generates DD_ON because if this diagramm (https://ascnb1.ru/forma1/viewtopic.p...=P2808#p474062) is correct pin 7 of p2808 is a gate....
    Last edited by jasko_jacker; 06-25-2020, 05:36 PM.

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      #3
      Re: Clevo N850HK and P2808

      DD_ON is not generated by p2808 . It is generated by IT8587 in Page 91.
      Last edited by caspian; 06-25-2020, 11:25 PM.

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        #4
        Re: Clevo N850HK and P2808

        Originally posted by caspian View Post
        DD_ON is not generated by p2808 . It is generated by IT8587 in Page 91.
        Thanks

        Comment


          #5
          Re: Clevo N850HK and P2808

          I substitute EC, reprogrammed without problems,
          no pch in place
          but when:

          1-> connect adapter -> POWER LED D55 is orange
          2-> push power button
          2a-> LED D52 (HDD) is green
          2b-> LED D55 (POWER L.) is green
          VDD5 is 5V
          but after 2sec all return point 1

          If I connect battery and adapter without push power button:
          1-> POWER LED IS ORANGE
          2-> BATT LED IS ORANGE
          on battery connector there is 12V
          but after 1-2 min
          BATT LED IS OFF
          POWER LED IS ORANGE

          but the battery should be charged even without pch ???

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