Checking the Battery Pack

Checking the Battery Pack
  1.  Power-off the computer.
  2.  Remove the battery pack and measure the voltage between battery  terminals 1 (+) and 4 (-).


    Voltage (Vdc) / Signal

    Terminal 340 (NiCd) 340CSE (NiMH)
    1 +10.0 to +18.0 +10.0 to +16.0
    2 NC 0 Ohm ground (-)
    3 10 KOhm ground (-) 10 KOhm ground (-)
    4 Ground (-) Ground (-)


  3.  If the voltage is less than +10.0 Vdc, the battery pack has  been discharged or is defective.  Recharge the battery.  If the recharging does not work,  go to Step 5 to check the charging circuit.

     If the voltage is still less than +10.0 Vdc after the recharging,  replace the battery.

  4.  If the voltage is more than +8.0 Vdc,  measure the resistance between  battery terminals 3 and 4.  The resistance must be 4 to 30 kilohms.

      If the resistance is not correct , replace the battery pack.
      If the resistance is correct , replace the system board.

  5.  To check the charging circuit, do the following.  Plug in the AC Adapter with the battery pack removed, then  power-on the computer.
  6.  Measure the charging voltage between terminals  1 (+) and 4 (-) on the computer.
  7.  If the voltage is less then +10.0 Vdc, replace  the system board.  If the voltage is more than +10.0 Vdc, the charging circuit is  working correctly, replace the battery pack.

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