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Hardware Functional Overview 3-11
Internal Battery Pack
The NEC Versa 2500 Series notebooks utilizes NiMH (Nickel Metal-Hydride) that pro-
vides DC power for the notebook
The battery pack contains ten size A battery cells that provide the system with 12V. When
installed in the notebook, the battery LED automatically appears and will also start to re-
charge whenever the AC adapter is connected to the notebook.
Normal charging time for the battery pack is around 1.5 hours when the computer is turned
off while it should take around 6 hours maximum when the computer is running.
Power Board
The power board receives approximately 12VDC from the battery pack and uses this input
voltage to generate +12V, +5V, +3.3V, (+3.45V) regulated output voltages to provide
power for all internal notebook board assemblies. The output of the +5V regulator also
drives the LCD inverter circuit on the LCD inverter board assembly. Refer to Chapter 2 for
more detailed information.
LCD Inverter Board Assembly
The LCD Inverter Board Assembly, located in the LCD Panel Assembly, converts the
+5VDC input from the Power Board module of the system board into a high voltage AC
output used to light the CCFT (Cold-Cathode Fluorescent Tube).
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SOLD BY laptopia2005 DO NOT RESELL!!