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Contents v
DRAM Memory.................................................................................................... 3-6
ROM Subsystem ................................................................................................... 3-6
I/O Subsystem ............................................................................................................. 3-6
VIDEO Subsystem....................................................................................................... 3-7
Video Chipset Controller ...................................................................................... 3-7
External VGA Capability....................................................................................... 3-8
Keyboard Subsystem.................................................................................................... 3-8
PCMCIA Controller and Sockets ................................................................................. 3-9
Hard Disk Subsystem................................................................................................... 3-9
Diskette Drive Subsystem ............................................................................................ 3-10
Pointing Device Subsystem .......................................................................................... 3-10
Power Subsystem......................................................................................................... 3-10
AC Power Adapter ............................................................................................... 3-10
Internal Battery Pack ............................................................................................ 3-11
Power Board......................................................................................................... 3-11
LCD Inverter Board Assembly .............................................................................. 3-11
Section 4 Field Service Guidelines
Preventive Maintenance ............................................................................................... 4-1
Cleaning the Notebook’s Exterior .........................................................................4-1
Cleaning the Notebook’s Interior .......................................................................... 4-2
Protecting the Disk Drives .................................................................................... 4-2
Handling the Computer Battery Packs...................................................................4-2
Maintaining the LCD Quality ................................................................................ 4-3
Required Tools and Replacement Procedures ............................................................... 4-3
Parts Removal and Replacement Procedures ................................................................ 4-4
Removing/Replacing the Notebook Battery Pack .................................................. 4-4
Removing/Replacing the Hard Disk Drive Module ................................................ 4-5
Removing/Replacing the Diskette Drive Module ................................................... 4-5
Removing/Replacing the LCD Status Bar Cover and Hinges ................................. 4-6
Removing/Replacing the Keyboard........................................................................4-7
Removing/Replacing the Heat Plate.......................................................................4-7
Removing/Replacing the CPU ...............................................................................4-7
Removing/Replacing the Cover-Display LCD Assembly Module ........................... 4-8
Removing/Replacing the System Top Cover Assembly and the NEC VersaGlide
Assembly...........................................................................................................4-8
Removing/Replacing the LED Board.....................................................................4-9