Announcement

Collapse
No announcement yet.

hp 640 G2 no power

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    hp 640 G2 no power

    hp 640 G2 no power
    there is 19 volt on the drain of Q60010 but no volt on gate or source of this mosfet
    Attached Files

    #2
    Re: hp 640 G2 no power

    Locate the charger IC which will be used to drive these DCIN mosfets.

    That is, ACDRV pin of the charger IC will supply the BOOSTed voltage onto the GATE of the measured mosfet. Only if the gate is DCADAPTER voltage + 6 volts = ~25 volts on the GATE, then this mosfet will enable - else will be OFF.

    Locate the charger IC and share the SMD markings - probably a TI BQ series.

    Comment

    Working...
    X