Table Of Contents - NEC Versa Note Series Service And Reference Manual

Power States Transition Event....................................................................................3-26
Battery Management............................................................................................................3-26
Battery Subsystem .....................................................................................................3-26
Battery Warning ........................................................................................................3-27
Battery Low...............................................................................................................3-27
AC Adapter ...............................................................................................................3-27
PIC16C62 – uP....................................................................................................................3-27
System Communication with PIC16C62 ....................................................................3-27
Pic16C62 Command List ..........................................................................................3-29
Miscellaneous......................................................................................................................3-32
Security .....................................................................................................................3-32
Smbios Support ......................................................................................................3-33
CMOS Setup Utility ............................................................................................................3-33
Hardware Functional Overview..........................................4-1
Overview...............................................................................................................................4-2
System Hardware Block Diagram ..........................................................................................4-3
Chipset Summary ..................................................................................................................4-4
System Processor (CPU)........................................................................................................4-4
Mobile Pentium II Features..........................................................................................4-4
System Core Logic ................................................................................................................4-6
82443BX Features (for Pentium-II)..............................................................................4-6
82371EE (PIIX4) Features...........................................................................................4-8
Clock Frequency Generator .................................................................................................4-10
Cache Memory ....................................................................................................................4-11
System Memory...................................................................................................................4-11
System Memory.........................................................................................................4-11
Video Memory ..........................................................................................................4-11
System BIOS .......................................................................................................................4-11
Video Subsystem .................................................................................................................4-11
Video Chip Controller ...............................................................................................4-12
Video Clock ..............................................................................................................4-13
I/O Subsystem .....................................................................................................................4-14
Pcmcia Controller.............................................................................................................4-15
Audio Subsystem.................................................................................................................4-17
Keyboard And Pointing Device.............................................................................................4-18
Disk Drives Subsystem ........................................................................................................4-19
Power Subsystem.................................................................................................................4-20
AC Power Adapter.....................................................................................................4-20
Internal Battery Pack .................................................................................................4-20
DC-DC Module of Motherboard ................................................................................4-20
LCD Inverter Board Assembly...................................................................................4-20
Micro-P Subsystem (PIC-16C62).........................................................................................4-20
Maintenance And Disassembly ..........................................5-1
Preventive Maintenance.........................................................................................................5-2
Cleaning the Computer ................................................................................................5-2
Protecting the Disk Drives ...........................................................................................5-2
Maintaining the LCD Quality.......................................................................................5-2
Maintaining the Hard Disk Drive .................................................................................5-2
Handling The Computer Battery Packs..........................................................................5-3
Required Tools and Equipment ..............................................................................................5-3
Contents v