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Service Manual - NEC Versa 4000 Series Laptop


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                     PROPRIETARY NOTICE AND LIABILITY DISCLAIMER


          The information disclosed in this document, including all designs and related materials, is
          the valuable property of NEC Corporation (NEC) and/or its licensors. NEC and/or its licen-
          sors, as appropriate, reserve all patent, copyright and other proprietary rights to this docu-
          ment, including all design, manufacturing, reproduction, use, and sales rights thereto, except
          to the extent said rights are expressly granted to others.
          The NEC product(s) discussed in this document are warranted in accordance with the terms
          of the Warranty Statement accompanying each product. However, actual performance of
          each such product is dependent upon factors such as system configuration, customer data,
          and operator control. Since implementation by customers of each product may vary, the
          suitability of specific product configurations and applications must be determined by the
          customer and is not warranted by NEC.
          To allow for design and specification improvements, the information in this document is
          subject to change at any time, without notice. Reproduction of this document or portions
          thereof without prior written approval of NEC is prohibited.

          FastFacts, and NEC SVGA, are U.S. trademarks of NEC Technologies, Inc.
          All other product, brand, or trade names used in this publication are the trademarks or registered
            trademarks of their respective trademark owners.




                                           First Printing -- August 1995

                Copyright 1995                                                    Copyright 1995
             NEC Technologies, Inc.                                              NEC Corporation
           1414 Massachusetts Avenue                                      7-1 Shiba 5-Chome, Minato-Ku
            Boxborough, MA 01719                                               Tokyo 108-01, Japan
              All Rights Reserved                                              All Rights Reserved


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                                                                                                  vii

          Preface

          This service and reference manual contains the technical information necessary to set up,
          and maintain the NEC VersaTM 4000 Series notebook systems. It also provides hardware
          and interface information for users who need an overview of the computer system design.
          The manual is written for NEC-trained customer engineers, system analysts, service center
          personnel, and dealers.
          Please refer to the training module provided on CD-ROM for system disassembly/assembly
          procedures.
          The manual is organized as follows:
          Section 1  Technical Information, provides an overview of the hardware and interface
          components. System specifications are listed including computer dimensions, weight, envi-
          ronment, safety compliance, power consumption, and system memory specifications.
          Section 2  Setup and Operation, takes the user from unpacking to setup and operation.
          The section includes a description of operating controls, setting parameters and accessing
          the NEC bulletin board system (BBS).
          Section 3  Illustrated Parts Breakdown (IPB), provides an exploded-view diagram of
          the NEC Versa 4000 series system and part numbers.
          Appendix A  Connector Locations and Pin Assignments, provides a list of the main
          board internal connector pin assignments and a list of external pin assignments.
          An Index is included for convenience.




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                                                                                                                                               iii

          Contents

          Preface.........................................................................................................................    vii
          Abbreviations...............................................................................................................        ix


          Section 1          Technical Information
          Hardware Overview.....................................................................................................              1-2
              Liquid Crystal Display (LCD)................................................................................                    1-2
              CPU Board ...........................................................................................................           1-3
              I/O Board .............................................................................................................         1-3
              Sound Board.........................................................................................................            1-3
              Infrared (IR) Front Assembly, Rear Assembly .......................................................                             1-4
              Battery Pack .........................................................................................................          1-4
              CMOS Battery......................................................................................................              1-4
              Bridge Battery ......................................................................................................           1-4
              PCMCIA Slots......................................................................................................              1-4
              Diskette Drive and the NEC VersaBay II ..............................................................                           1-5
              Keyboard ..............................................................................................................         1-5
              NEC VersaGlide ...................................................................................................              1-5
          System Memory...........................................................................................................            1-5
              Memory Map ........................................................................................................             1-6
          System Video...............................................................................................................         1-7
          Parallel Interface ..........................................................................................................      1-11
          Serial Interface.............................................................................................................      1-12
          NEC Versa 4000 Series Chip Set .................................................................................                   1-12
              Intel Pentium P54LM............................................................................................                1-12
              Cache Controller, Address Logic, Data Controller.................................................                              1-13
              System Logic, IDE Interface, Peripheral Controller ...............................................                             1-13
              Flash ROM ...........................................................................................................          1-13
                    ROM BIOS....................................................................................................             1-14
              VGA Controller ....................................................................................................            1-14
                    Video Controller Architecture ........................................................................                   1-15
              Diskette Controller, Serial Interface, Parallel Interface ..........................................                           1-15
              Keyboard Controller .............................................................................................              1-15
              PCMCIA Controller..............................................................................................                1-15
              Interrupt Controllers .............................................................................................            1-16




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          iv     Contents


          Power Management Overview .....................................................................................                  1-17
              System Power Management ..................................................................................                   1-17
              Local Power Management.....................................................................................                  1-18
          Plug and Play...............................................................................................................     1-18
          Specifications...............................................................................................................    1-19


          Section 2         Setup and Operation
          Unpacking the System..................................................................................................            2-1
          Hardware Setup ...........................................................................................................        2-1
              Cable Connections ................................................................................................            2-2
          Operating Controls ......................................................................................................         2-3
              Status Bar .............................................................................................................      2-4
                   Status Icons ...................................................................................................         2-5
                   Battery Status ................................................................................................          2-5
              Function Keys (Fn Keys).......................................................................................                2-6
              Smart Power Switch .............................................................................................              2-6
              Dip Switch............................................................................................................        2-7
          Power-on Self-Test (Post)............................................................................................             2-8
              POST Errors.........................................................................................................          2-9
          Setup Utility ................................................................................................................   2-10
              Accessing Setup....................................................................................................          2-10
                   With an Error at POST ..................................................................................                2-10
                   With No Errors at POST................................................................................                  2-10
              Setup Screen.........................................................................................................        2-11
                   Setup Keys.....................................................................................................         2-11
          Changing/Setting Parameter Settings............................................................................                  2-11
          Parameter Options .......................................................................................................        2-13
              Parameter Descriptions .........................................................................................             2-14
                   Time/Date......................................................................................................         2-14
                   Drives ............................................................................................................     2-14
                   Peripherals .....................................................................................................       2-14
                   Security .........................................................................................................      2-15
                   Power Savings ...............................................................................................           2-15
          Security Options ..........................................................................................................      2-16
              System Password ..................................................................................................           2-16
                   Using the System Password............................................................................                   2-16
              Keyboard Lock Hotkey.........................................................................................                2-17




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                                                                                                                        Contents          v


          BIOS Update Utility (BUU).........................................................................................            2-17
              Precautions ...........................................................................................................   2-17
              Downloading the Update Utility............................................................................                2-17
              Using the Update Utility........................................................................................          2-18
              Menu Functions ....................................................................................................       2-20
          Power Sources.............................................................................................................    2-23
              AC Adapter ..........................................................................................................     2-23
              Battery Power.......................................................................................................      2-24
                  Recharging the Battery Pack ..........................................................................                2-24
          Replacing the Battery Pack ..........................................................................................         2-24
              Saving Battery Power ...........................................................................................          2-26
          Automatic Power-Saving Features ...............................................................................               2-27


          Section 3         Illustrated Parts Breakdown


          Appendix A           Connector Locations and Pin Assignments


          List of Figures
          1-1         NEC Versa 4000 Series System Features ....................................................... 1-1
          1-2         NEC Versa 4000 Series (Rear View).............................................................. 1-2

          2-1         Power and I/O Connector Locations ..............................................................                   2-2
          2-2         Keyboard Panel Controls................................................................................            2-3
          2-3         Right Side Panel Controls ..............................................................................           2-3
          2-4         Status Bar Location .......................................................................................        2-4
          2-5         Status Bar Icons.............................................................................................      2-5
          2-6         Dip Switch Location ......................................................................................         2-7
          2-7         Dip Switch Settings........................................................................................        2-7
          2-8         Connecting the AC Adapter ...........................................................................             2-23
          2-9         Battery Cover Latch Location ........................................................................             2-25
          2-10        Battery Pack Replacement..............................................................................            2-25
          2-11        Battery Bay Cover Replacement.....................................................................                2-26

          3-1         NEC Versa 4000 Series Illustrated Parts Breakdown...................................... 3-3

          A-1         System Board Connector Locations ............................................................... A-1




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          vi    Contents


          List of Tables
          1-1      NEC Versa 4000 Series System Memory Map ............................................... 1-6
          1-2      CRT Display Mode (CRT only)...................................................................... 1-7
          1-3      LCD Display Modes (640 x 480 TFT, Simultaneous CRT)............................. 1-9
          1-4      LCD Display Modes (640 x 480 DSTN, Simultaneous CRT) ......................... 1-10
          1-5      NEC Versa 4000 Series Chip Types and Technologies ................................... 1-12
          1-6      NEC Versa 4000 Series Interrupt Level Assignments ..................................... 1-16
          1-7      Maximum Performance Default Settings......................................................... 1-18
          1-8      Specifications................................................................................................. 1-19

          2-1      I/O Connector Descriptions............................................................................         2-2
          2-2      Control and Switch Functions ........................................................................          2-4
          2-3      FnKey Operations ..........................................................................................    2-6
          2-4      POST Error Messages....................................................................................        2-9
          2-5      Setup Key Functions ......................................................................................    2-11
          2-6      System Parameter Settings .............................................................................       2-13
          2-7      Automatic Power-Saving Features .................................................................             2-27

          3-1      NEC Versa 4000 Series Field-Replaceable Parts............................................. 3-1
          3-2      Option and Documentation Part Numbers ...................................................... 3-4

          A-1      CPU Board Connectors.................................................................................. A-1
          A-2      Keyboard/Mouse Connector Pin Assignments ................................................ A-1
          A-3      Serial Port Connector Pin Assignments .......................................................... A-2
          A-4      CRT Connector Pin Assignments ................................................................... A-2
          A-5      Parallel Printer Pin Assignments ..................................................................... A-3
          A-6      Expansion Connector Pin Assignments........................................................... A-4
          A-7      Power Connector ........................................................................................... A-8
          A-8      Hard Disk Drive Connector............................................................................ A-9
          A-9      Diskette Drive Connector............................................................................... A-10




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          Section 1

          Technical Information
          The NEC Versa 4000 series computers integrate the Intel



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