Checking the Battery Pack (9546, 9547)

Checking the Battery Pack

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

Do the following:
  1.  Power-off the computer.
  2.  Remove the battery pack and measure the voltage between battery  terminals 1 (+) and 4 (-).


    Terminal Voltage (Vdc) / Signal
    1 +0 to +13.5
    2 Send
    3 Thermal
    4 Ground (-)
    5 Select


    NOTE: Signal lines, not used in these steps,  are used for communication between the system and the battery.

     If the voltage is less than +11.0 Vdc, the battery pack has  been discharged. Recharge the battery pack.

  3.  If the voltage is still less than +11.0 Vdc after recharging,  replace the battery.

    NOTE:   If the voltage of the battery pack is 0 V, it is not defective.

  4.  If the voltage is more than +11.0 Vdc,  measure the resistance between  battery terminals 3 and 4.  The resistance must be 4 to 30 K ohm.

If the resistance is not correct, replace the battery pack.
If the resistance is correct, replace the DC/DC card.

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