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Checking the Battery ASM



Checking the Battery ASM


Battery ASM charging will not start until the Fuel-Gauge shows that less than 95% of the total power remains, with this condition, the Battery ASM can charge to 100% of its capacity.
This protects the Battery ASM from being overcharged or having a shortened life.

Do the following:
  1.  Power off the computer.
  2.  Remove the Battery ASM and measure the voltage between battery terminals 1(+) and 7(-).
     See the following figure:
     
    Note: Signal lines, not used in these steps, are used for communications  between the system and the battery.

  3.  If the voltage is less than 10.6V (Li-Ion) or 9.6V (NiMH), the Battery ASM has been discharged,  recharge the Battery ASM. If the voltage is still less than 10.6V (Li-Ion) or 9.6V (NiMH), replace the  battery.
  4.  If the voltage is more than 10.6V (Li-Ion) or 9.6V (NiMH), measure the resistance between battery  terminals 5 and 7. The resistance must be 390 ohm (Li-Ion) or 4 to 3K ohm. If the resistance is not  correct, replace the Battery ASM. If the resistance is correct, replace the DC-DC &  BATT board then the system/planar board.

More INFORMATION / HELP is available at the  IBM-HelpCenter

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