Section 3 Hardware Functional Overview - NEC Versa 2400 Series Service Manual

Section 3
Hardware Functional Overview
The NEC Versa 2400 Series notebooks consist of several major functions and subsystems
including:
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system BIOS - implemented on the system board and EPROM
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system processor - implemented on the system board
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system logic controller - implemented on the I/O Board
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memory subsystem - implemented on the system board
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video subsystem - implemented on the I/O board, LED board, and LCD display
panel
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I/O subsystem - implemented on the I/O board
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keyboard subsystem - implemented on part of the system board, and keyboard as-
sembly
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PCMCIA controller and sockets - implemented on the system board
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pointing device subsystem - implemented on the I/O board and keyboard assembly
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hard disk subsystem - implemented on the system board and the hard drive as-
sembly
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floppy disk subsystem - implemented on the system board and the floppy drive
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power subsystem - implemented on the power supply board, inverter board, bat-
tery packs, and AC adapter
A simplified block diagram of the notebook is shown on the next page.