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NEC Versa 2400 Series Service Manual

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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.
Versa is a U.S. registered trademark of NEC Technologies, Inc.
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.
Copyright 1996
NEC Technologies, Inc.
1414 Massachusetts Avenue
Boxborough, MA 01719
All Rights Reserved
First Printing — September 1996
Copyright 1996
NEC Corporation
7-1 Shiba 5-Chome, Minato-Ku
Tokyo 108-01, Japan
All Rights Reserved

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Summary of Contents for NEC Versa 2400 Series

  • Page 1 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.

  • Page 2: Preface

    2400 Series notebook computer. It also provides hardware and interface information for users who need an overview of the system’s design. The man- ual is written for NEC-trained customer engineers, system analysts, service center person- nel, and dealers. The manual is organized as follows:...

  • Page 3: Table Of Contents

    Contents Preface......................... Abbreviations....................... xiii Section 1 Introduction Feature Highlights......................1-2 System Configuration....................1-3 Quick Tour of the Notebook..................1-4 Main Components....................1-4 Color LCD Display Panel................1-4 Power Switch/LCD Cover Switch ..............1-4 Status Panel and Power Indicator ..............1-5 Keyboard .......................
  • Page 4 Contents System BIOS Setup Program ..................1-14 The Boot Setup Menu....................1-15 System Upgrades ......................1-19 Memory Upgrade Procedure ..................1-19 System BIOS Upgrade Procedure ................1-21 Section 2 General Specifications Product Mix......................... 2-6 System Board Specifications ..................2-7 Transfer Board Specifications ..................2-8 Converter Board Specifications..................
  • Page 5 Contents Section 3 Hardware Functional Overview Functional Block Diagram.................... 3-2 System BIOS ....................... 3-3 System Processor....................3-3 Major Functional Blocks ..................3-3 System Logic Controller ....................3-4 Memory Subsystem...................... 3-6 DRAM Memory....................3-6 ROM Memory ...................... 3-6 I/O Subsystem ......................3-6 Video Subsystem ......................
  • Page 6 Removing/Replacing the System Board and I/O Board.......... 4-10 Separating the System Board and I/O Board ............4-11 Removing/Replacing the Power Board ..............4-12 NEC Versa 2400 Series Illustrated Parts Breakdown..........4-13 Packaging and Documentation ................4-16 Section 5 Troubleshooting and Repair Service Information......................
  • Page 7 The LED Board Module Assembly..............4-9 The System Board Module Assembly ............. 4-10 The I/O Board Module Assembly ..............4-11 Power Board Module Assembly ..............4-12 NEC Versa 2400 Series Illustrated Parts Breakdown........4-15 List of Tables Model Configurations ..................1-1 Feature Highlights..................1-2 Fn Key Combination Summary...............
  • Page 8 2-26 Shock Specifications ..................2-23 2-27 Electro-static Discharge (ESD) Specifications ..........2-23 NEC Versa 2400 Series Field-Replaceable Parts..........4-13 Packaging and Documentation Part Numbers ..........4-16 NEC Service and Information Telephone Numbers......... 5-1 POST Error Messages..................5-4 POST Error Messages..................5-5 BIOS Informational Messages................
  • Page 9 Contents VGA Extended Modes (15-Bit Linear Mode)..........A-3 VGA Extended Modes (16-Bit Linear Mode) - 1 MB Video Memory Only ................. A-4 A-10 VGA Extended Modes (24-Bit Linear Mode)..........A-4 A-11 VGA Extended Modes (Planar Mode)............A-4 A-12 VGA Extended Modes (Packed Pixel Mode)..........A-4 A-13 VGA High Refresh Modes (Packed Pixel Mode) ..........
  • Page 10 (For United States Use Only) FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT WARNING: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.

  • Page 11: Abbreviations

    xiii Abbreviations ampere disk operating system alternating current DRAM dynamic RAM advanced technology data terminal equipment (IBM PC) error checking and correction Bulletin Board System error detecting system binary-coded decimal Enhanced Graphics Adapter BIOS Customized Utility Expanded Memory BIOS basic input/output system Specification binary digit enhanced parallel port...
  • Page 12 Abbreviations Interrupt Request register printed circuit board Industry Standard Architecture plastic flat package In Service register parallel input/output input/output pixel picture element integrated peripheral controller PJQFP plastic J-lead quad flat pack inches per second PLCC plastic lead chip carrier interrupt request phase lock loop kilo (1024) peak-to-peak...
  • Page 13 Abbreviations UART universal asynchronous receiver/transmitter volt volts, direct current VESA video electronics standards association variable frequency oscillator Video Graphics Array VLSI very large-scale integration VRAM virtual RAM watt microfarad microprocessor microsecond...

  • Page 14: Section 1 Introduction

    This section focuses on providing outline features and operations of the NEC Versa 2400 Notebook Computer Series, including the BIOS Setup program. (Refer to the User’s Guide for more information how to operate the notebook.) The NEC Versa 2400 Series of note- books are lightweight, compact, and fully IBM compatible.

  • Page 15: Feature Highlights

    Introduction FEATURE HIGHLIGHTS The NEC Versa 2400 notebook series includes a variety of innovative features designed to meet the most demanding computing requirements: Table 1-2 Feature Highlights Features Description Intel P54CSLM-100MHz (Intel P54CSLM-133MHz for 243X) processor with internal 16KB cache memory and math coprocessor...

  • Page 16: System Configuration

    Introduction SYSTEM CONFIGURATION The following diagram shows the NEC Versa 2400 system configuration. I N T E L C o l o r L C D P 5 4 C S L M ( T C P ) ( 8 0 0 x 6 0 0 )

  • Page 17: Quick Tour Of The Notebook

    This section describes the main features of the NEC Versa 2400 computer. Color LCD Display Panel Both the NEC Versa 240X and 243X series have a built-in 11.3” passive matrix dual scan DSTN color liquid crystal display (LCD) which you can adjust and tilt to your desired viewing position.

  • Page 18: Status Panel And Power Indicator

    Introduction NOTE: If the NEC Versa 2400 has been left un- used for a prolonged period of time the battery may become completely discharged. It will then be necessary for you to reconnect the AC adapter for approximately 30 minutes before the battery will begin to recharge normally.

  • Page 19: Fn Key Combination Summary

    Introduction NOTE: Activating the Num Lock key will in turn disable the alphanumeric keys where the embedded keys are located. Press the Num Lock key again to disable the embedded keys and re- sume normal keyboard operation. Table 1-3 Fn Key Combination Summary Key Combina- Function tion...

  • Page 20: Versaglide

    Introduction VersaGlide In front of the keyboard panel, in the center of the palm rest typing surface, is the Versa- Glide pointing device. The buttons below the glide pad are configured (by default) as the left and right button respectively. While the button to the right is configured as the right button on the mouse.

  • Page 21: The Right Side Of The Notebook

    Introduction The Right Side of the Notebook This section describes the features on the right side of the NEC Versa 2400 computer. Built-in Floppy Disk Drive On the right-front side of the notebook you will find the floppy disk drive which supports 3.5-inch 1.44MB high density (HD) diskettes or 720KB double-sided (DS) diskettes.

  • Page 22: Hard Disk Drive Compartment

    Just beside the floppy disk drive, and below the PCMCIA slots, is the notebook’s internal hard drive. The NEC Versa 2400 provides industry standard 2.5-inch IDE hard disk drive at 810MB and 1GB. The System BIOS of the notebook also includes Auto IDE detection and LBA mode for easy installation as well as later upgrades for higher capacity disk drives.

  • Page 23: Left Side Of The Notebook

    To the left of the PCMCIA compartment, you will find a connector jack for the AC. The NEC Versa 2400 series provides a universal auto-switching AC adapter where you connect the AC power cord and into the power outlet. It is important to have the AC adapter con- nected to the notebook to recharge the battery and keep the notebook working continu- ously.

  • Page 24: The Rear Of The Notebook

    The NEC Versa 2400 also provides a Y-connector adapter allowing simultaneous use of an external AT-enhanced keyboard and a PS/2 mouse. When the external PS/2 mouse is con- nected using the Y-connector, the built-in VersaGlide is disabled.

  • Page 25: Vga Port

    VGA port can support resolution at 800x600 at 256 colors and 1024x768 at 16 colors for the NEC Versa 2400 and 640x480 at 64K colors, 800x600 at 256 colors, and 1024x768 at 256 colors for both the NEC Versa 2400 and 2430.

  • Page 26: Printer Port

    Introduction 1-13 Printer Port The 25-pin printer port provides a parallel interface to connect a parallel printer or pocket network adapter. Many operating systems and software applications refer to this port as LPT1. You can run the BIOS SETUP program to change the configuration of the parallel port to Standard or Bi-directional.

  • Page 27: Bottom Of The Notebook

    This section provides the outline features and operation of the Phoenix BIOS Setup pro- gram used in the NEC Versa 2400 Series. The BIOS (Basic Input-Output System) Setup program allows you to change the system configuration settings such as the current date and time, the disk drive and ports settings, and the power management as well.

  • Page 28: The Boot Setup Menu

    Introduction 1-15 Press the F2 key to run the BIOS Setup program. The BIOS Setup program is organized into two pages of menus. Change settings using the PgDn and PgUp keys. To move from one option to another, you use the up and down arrow keys while using the spacebar and - keys to change the settings.

  • Page 29: Boot Main Setup Menu

    This field reports the amount of extended memory found by the BIOS during POST. The value displayed is the amount of the memory address map. Because all models in the NEC Versa 2400 series have a minimum of 8MB of memory as the standard configuration, this value should not be less than 3072KB.

  • Page 30: Boot Setup Peripherals Menu

    Introduction 1-17 Table 1-5 Boot Setup Peripherals Menu Item Function This option allows you to configure the notebook’s serial port Serial Port as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4), (2E8-IRQ3), or none. The default setting is (3F8-IRQ4). Infrared Serial Port This option allows you to configure the notebook’s infrared serial port as either (3F8-IRQ4), (2F8-IRQ3), (3E8-IRQ4), (2E8-IRQ3), or none.

  • Page 31: Boot Setup Power Savings Menu

    1-18 Introduction Table 1-7 Boot Setup Power Savings Menu Item Function Power Saving This option allows you to enable or disable power manage- ment. Select Disabled, all other power management settings are ig- nored and disabled as well. Select Disabled ON AC, the power management is disabled only when the computer is powered by the AC adapter, but will enable the power management while on battery.

  • Page 32: System Upgrades

    This feature does not apply to PCMCIA port modems. SYSTEM UPGRADES The NEC Versa notebook is easily upgradable to a higher capacity hard drive. In addition, you can add an optional second memory modules to increase the system memory to as much as 48MB.

  • Page 33: Mb Memory Configurations

    1-20 Introduction For NEC Versa 2400 Series Notebooks, the following memory configurations are applica- ble: Table 1-8 8 MB Memory Configurations On-Board Memory Extra Socket Total Memory empty 16MB 16MB 24MB 24MB 32MB 32MB 40MB Table 1-9 16 MB Memory Configurations...

  • Page 34: System Bios Upgrade Procedure

    SYSTEM BIOS UPGRADE PROCEDURE The NEC Versa 2400 Series supports the EPROM Flash BIOS that allows you to easily update the system BIOS using the Flash Programming utility program called “PHLASH.COM & PLATFORM.BIN”. Update the system BIOS whenever you are up- grading the LCD Panel or adding modifications to the computer’s hardware function.

  • Page 35: Section 2 General Specifications

    Section 2 General Specifications The following table lists NEC Versa 2400 Series system specifications. Table 2-1 NEC Versa 2400 Series Specifications ITEM SPECIFICATION Pentium P54CSLM-100MHz TCP Package Pentium P54CSLM-133MHz TCP Package System RAM 8MB On-board Upgradeable to 40 MB on 240X model or 48 on 243X model...
  • Page 36 General Specifications Table 2-1 NEC Versa 2400 Series Specifications ITEM SPECIFICATION Hard Disk Drive Removable HDD Module 2.5-inch format / 12.7mm high Enhanced IDE Interface Support IDE PIO mode up to MODE 4 Support IDE MASTER MODE 810MB/1GB CD-ROM Removable CD-ROM Module...
  • Page 37 General Specifications Table 2-1 NEC Versa 2400 Series Specifications ITEM SPECIFICATION Hot-Key Fn + F8 = Volume Mute Operation Fn + Esc = Suspend Control Fn + <right> = Contrast Up Fn + <left> = Contrast Down Fn + <Up> = Brightness Up Fn + <Down>...
  • Page 38 General Specifications Table 2-1 NEC Versa 2400 Series Specifications ITEM SPECIFICATION Audio Support external Stereo Headphone Jack Support external Stereo Line-In Jack Support external MIC. Jack Two Built-in speakers Built in microphone Status Indicator LED Display External LED Power ON & Battery Low (Blanking)
  • Page 39 General Specifications Table 2-1 NEC Versa 2400 Series Specifications ITEM SPECIFICATION Optional Items External Battery Charger Port Replicator Key Components 11.3” Color DSTN SVGA LCD: LMG9910ZWCC Hitachi CD-ROM: CDR-N16-P Sanyo, or CD-46E TEAC 810MB HDD or 1GB HDD FDD, NEC FD1238H...

  • Page 40: Product Mix

    General Specifications PRODUCT MIX The following table lists the NEC Versa 2400 Series product mix. Table 2-2 Product Mix 240XD (RT4) 240XCD (RT4CD) 243XCD (RT4CD) Pentium / 100MHz Pentium / 100MHz Pentium / 133MHz P54CSLM(TCP) / P54CSLM(TCP) / P54CSLM(TCP) /...

  • Page 41: System Board Specifications

    General Specifications SYSTEM BOARD SPECIFICATIONS The following table lists system board specifications. Table 2-3 Main Board Specifications ITEM SPECIFICATION Clock NS Clock Buffer CGS74CT 2524 PGA Socket DRAM 1M x 16-bit DRAM x 4 Video RAM 256K x 16-bit DRAM (5V / 60ns), SOJ x 2 System Chipset UMC UM8891BN, 208 Pin, PQFP UMC UM8892BN, 208 Pin, PQFP...

  • Page 42: Transfer Board Specifications

    General Specifications TRANSFER BOARD SPECIFICATIONS The following table lists Transfer board specifications. Table 2-4 Transfer Board Specifications ITEM SPECIFICATION Internal Connector To FDD: 100 Pin, AMP To second battery 100Pin, AMP Thickness: 1.2mm Layers: 4 CONVERTER BOARD SPECIFICATIONS The following table lists Converter board specifications. Table 2-5 Converter Board Specifications ITEM SPECIFICATION...

  • Page 43: Led Indicator Board

    General Specifications LED INDICATOR BOARD The following table lists LED indicator board specifications. Table 2-6 LED Indicator Board Specifications ITEM SPECIFICATION Internal Connector To System PCB 50 Pin, Suyin To System PCB 40 Pin, Suyin To LCD Panel 50 Pin, KEL To Inverter 8 Pin, Molex To Left Speaker...

  • Page 44: I/O Board

    2-10 General Specifications I/O BOARD The following table lists I/O board specifications. Table 2-7 I/O Board Specifications ITEM SPECIFICATIONS Clock Crystal 14.318MHz, DIP Type Crystal 32.768KHz, DIP Type Crystal 4MHz, DIP Type Generator: AV9154-43, SOP 16 Pin Flash ROM for BIOS 256K x 8, 150ns System Chip Set UMC UM8886BN, 208 Pin, PQFP...
  • Page 45 General Specifications 2-11 Table 2-7 I/O Board Specifications ITEM SPECIFICATIONS Internal Connector To System PCB 100 Pin, AMP To System PCB 100 Pin, AMP To HDD Unit 50 Pin, KEL To CD ROM Unit 40 Pin, KEL To RTC Battery 2 Pin, Molex To Transfer PCB 40 Pin, Suyin...

  • Page 46: Lcd Inverter Board

    2-12 General Specifications LCD INVERTER BOARD The following table lists LCD inverter board specifications. Table 2-8 LCD Inverter Board Specifications ITEM Specification Color Inverter Hitachi 11.3” DSTN LMG9910ZWCC Input Voltage 8V to 20V Output Voltage 500VAC Max. Contrast Voltage 28V ~ 31V 6mA (Max.) Output Load Current Brightness Control...

  • Page 47: Led Status Indicators

    General Specifications 2-13 LED STATUS INDICATORS The following table lists NEC Versa 2400 Series LEDs. For example, the AC IN LED lights to indicate power is on and that the battery is charging. Table 2-9 Status LED Descriptions ITEM PMU Enabled...

  • Page 48: Hdd Unit Specification

    2-14 General Specifications HDD UNIT SPECIFICATION The following table lists the standard hard drive specifications. Table 2-11 Hard Disk Drive Specifications ITEM SPECIFICATION Module 2.5” Removable HDD Module Capacity 810MB / 1 GB Interface Enhanced IDE Interface Unit Size 100mm (L) x 70mm (W) x 12.7mm (H) CD-ROM SPECIFICATION The following table lists the standard CD-ROM reader specifications.

  • Page 49: Dc/Dc Converter & Battery Charger Specification

    General Specifications 2-15 DC/DC CONVERTER & BATTERY CHARGER SPECIFICATION The following table lists DC/DC converter & battery charger specifications. Table 2-14 DC/DC Converter & Battery Charger ITEM SPECIFICATION Input Voltage 9V -> 20V Output Voltage 12V, 5V, 3.3V Output Current 0.1A, 2.5A, 2.5A Output Ripple 150mV, 100mV, 100mV...

  • Page 50: Keyboard

    2-16 General Specifications KEYBOARD The following table lists keybord specifications. Table 2-16 Keybord Specifications ITEM SPECIFICATION Key Switch Type Membrane Key Stroke 0.5mm Operating Force 20GF Key Pitch 19.05mm AC/DC ADAPTER The following table lists AC/DC adapter specifications. Table 2-17 AC/DC Adapter Specifications ITEM SPECIFICATION Input Voltage...

  • Page 51: Bios

    General Specifications 2-17 BIOS The following table lists BIOS specifications. Table 2-18 BIOS Specifications ITEM Specification Floppy Disk Drive Support standard 3.5” FDD Support 720KB and 1.44MB Modes Hard Disk Drive Support Standard IDE Hard Disk Auto-detect IDE Features Support LBA mode for larger capacity VGA Display Use Chips OC65548 VGA BIOS to support Monitor Sense or Auto Display...

  • Page 52: Micro-Controller Function Description

    2-18 General Specifications Table 2-18 BIOS Specifications ITEM Specification Suspend (To RAM) STR can be invoked by Hot-Key, Cover-Switch, Battery Low-Low Condition, & Operating System request STR can be resumed by Keyboard && Power Button Save To Disk STD can be invoked by Hot-Key, Cover-Switch, Battery Low-Low condition &...

  • Page 53: Power Management Features (Mode Definition)

    General Specifications 2-19 POWER MANAGEMENT FEATURES (MODE DEFINITION) The following table lists power management specifications. Table 2-20 Power Management Modes Mode Device Speed Full-On Mode CPU State Full speed Peripherals State Normal Doze Mode Timer On / Off CPU State Stop Grant State DRAM State Slow Refresh...

  • Page 54: Power Management Features (Mode Transition)

    2-20 General Specifications Table 2-20 Power Management Modes Mode Device Speed Suspend To Disk Timer Off/1/2/4/8/16 Min CPU State Power System Power-On Group Micro-Controller Activity Events Power Switch Battery Low CPU State CPU Clock/2 Condition LCD State Backlight On (Lower 25%) Battery Low / Low CPU State Condition...

  • Page 55: Hot Key Definition

    General Specifications 2-21 Fully-On Activity Events Occur Suspend Mode Time-Out Battery Low - Low Condition Resume Events Occur HOT KEY DEFINITION The following table lists hot key definitions. Table 2-22 Hot Keys FUNCTION KEY CONTENT <Fn> + <Esc> Suspend <Fn> + <F10> LCD/CRT/SIMUL.

  • Page 56: Power Source

    2-22 General Specifications POWER SOURCE The following table lists system power specifications. Table 2-24 Power Specifications Input Nominal Version AC Voltage 100 ~ 250 V 90 ~ 265 V AC Frequency 50 / 60 Hz 47 ~ 63 Hz VIBRATION The following table lists vibration specifications.

  • Page 57: Shock

    General Specifications 2-23 SHOCK The following table lists system shock specifications. Table 2-26 Shock Specifications ITEM MODE Operating Mode Impact Accelerator: 1g/10g Based on Half Sine-Wave Shock Pulses of 11Msec Number of Shock: 3 Shocks for each of the 6 faces Direction of movement: 6 Faces Non-Operating Mode Impact Accelerator: 10g, 20g, 30g, 40g, 50g Based on Half Sine-...

  • Page 58: Section 3 Hardware Functional Overview

    Section 3 Hardware Functional Overview The NEC Versa 2400 Series notebooks consist of several major functions and subsystems including: system BIOS - implemented on the system board and EPROM system processor - implemented on the system board system logic controller - implemented on the I/O Board...

  • Page 59: Functional Block Diagram

    Hardware Functional Overview FUNCTIONAL BLOCK DIAGRAM The following figure shows the NEC Versa 2400 Series functional diagram. FLASH BIOS 2 5 6 K B C A R D 0 PCMCIA O M E G A Bank 0 8 2 C 0 9 4...

  • Page 60: System Bios

    The NEC Versa 2400 Series uses the Phoenix BIOS. The BIOS SETUP program is an easy-to-use system utility configuration that sets system parameters and copies them on the EPROM chip with the system BIOS.

  • Page 61: System Logic Controller

    Hardware Functional Overview Cache Unit Memory Management Unit Bus Interface Unit Instructions are executed in the Integer Unit pipeline and in the Floating Point Unit (FPU). The Cache Unit stores the most recently used data and instructions and provides fast access to this information for the Integer and Floating Point Units.
  • Page 62 Hardware Functional Overview Memory Controller - Supports ROM DOS up to 64MB by XIP, 16MB by EMS Supports Shadow RAM from C0000-FFFFF Supports SLOW and SELF Refresh DRAM Supports Stagger Refresh On-board memory up to 48MB Supports Three Memory Banks Supports Page Mode/Burst mode operation Supports 512KBx8, 1Mx4, 1Mx16, 2Mx8 and 4Mx4 type DRAM Supports 8 or 16 bit ROM configuration...

  • Page 63: Memory Subsystem

    (Refer to Chapter 1 on System Upgrades to know more about how to upgrade the system memory). ROM Memory The NEC Versa 2400 Series notebooks contains both the main system BIOS and the VGA BIOS with Shadow BIOS capability. I/O SUBSYSTEM The I/O Subsystem of the notebook is implemented on the I/O Board using the NS PC87336VLJ chipset.

  • Page 64: Video Subsystem

    Hardware Functional Overview VIDEO SUBSYSTEM The video subsystem, implemented on the system board and on the LCD Panel, controls the display output to both the LED Panel and to the external VGA port. The video subsystem utilizes the C&T 65548 High Performance Flat Panel / CRT VGA Controller.

  • Page 65: External Vga Capability

    LCD and the external CRT monitor. The notebook provides external resolution of 1024x768 by 256 colors for the NEC Versa 2400 series with 1MB video memory. The NEC Versa 2400 Series can also provide simultaneous display at 800x600 at 256 colors with the standard VGA DSTN LCD.

  • Page 66: Pcmcia Controller And Sockets

    It supports two independent 68 pins PC card sockets and is register com- patible with Intel’s 82365SL. The NEC Versa 2400 Series notebook incorporates PCMCIA double deck slots that sup- ports insertion of two Type I or II cards at the same time or one Type III card on the upper slot and one Type I or II card on the bottom slot.

  • Page 67: Hard Disk Subsystem

    The NEC Versa 2400 Series notebook is equipped with high capacity hard disk drive rang- ing from 810MB to 1.4GB using the IDE controller with LBA (Logical Block Addressing) mode support.

  • Page 68: Ac Power Adapter

    Internal Battery Pack The NEC Versa 2400 Series notebooks utilizes NiMH (Nickel Metal-Hydride) that pro- vides DC power for the notebook (and for the NVRAM and real time clock battery on the Motherboard) when the AC Adapter is not connected to the computer.

  • Page 69: Section 4 Field Service Guidelines

    Section 4 Field Service Guidelines This section contains preventive and corrective maintenance procedures for the NEC Versa 2400 Series notebook computers. The first part of this section will describe the computer cleaning procedures and preferred handling procedures for sensitive components (i.e. disk drives, batteries).

  • Page 70: Cleaning The Notebook's Interior

    Field Service Guidelines Cleaning the Notebook’s Interior When servicing the inside of the notebook to remove dust and other foreign particles pro- ceed as follows: Remove the top cover, hinge covers, status bar, and keyboard using the disas- sembly procedures discussed later. Dust or vacuum (with a rubber-tipped nozzle) the inside of the system unit, par- ticularly the system board surface.

  • Page 71: Maintaining The Lcd Quality

    Leaving the computer cover open for about ten minutes while the heat disperses will eliminate this potentiality damaging situation. REQUIRED TOOLS AND EQUIPMENT All NEC Versa 2400 corrective maintenance procedures can be performed using the follow- ing tools: tweezers small flat-blade screwdriver small Phillips screwdriver small Hex-bolt screwdriver.

  • Page 72: Parts Removal And Replacement Procedures

    PARTS REMOVAL AND REPLACEMENT PROCEDURES This section contains field service-level removal/replacement procedures for the notebook. Refer to the exploded diagram later in this section to identify all relevant parts. The NEC Versa notebook is designed for optimum modularity in order to make field replacement maintenance easy and efficient.

  • Page 73: Removing/Replacing The Hard Disk Drive Module

    Field Service Guidelines Removing/Replacing the Hard Disk Drive Module The procedure for removing and replacing the hard disk drive module is as follows: Turn off the computer. Close the LCD cover and turn the whole unit over. You will find a clamp latch (lock knob) that is securing the hard disk drive module to the system unit.

  • Page 74: Removing/Replacing The Lcd Status Bar Cover And Hinges

    Field Service Guidelines To replace the floppy drive unit, remove the four small screws attaching it to the null floppy disk drive assembly and remove the floppy disk drive cable. To replace the floppy disk drive module, reverse the above procedure. Figure 4-2 Floppy Drive Module Assembly Removing/Replacing the LCD Status Bar Cover and Hinges Remove the LCD Status Bar Cover and Hinge Covers are as follows:...

  • Page 75: Removing/Replacing The Heat Plate

    Field Service Guidelines Remove the keyboard cable from the system board’s FPC type connector. To re- lease the keyboard cable from the connector, gently lift (using your fingernail or a thin pointed object) the connector locks on the left and right edge. Pull the key- board cable out and remove the keyboard from the notebook.

  • Page 76: Removing/Replacing The Cover-Display Lcd Assembly Module

    Lift the Cover-Display LCD Assembly Module from off of the unit and set aside. To remount the Cover-Display LCD Assembly Module, reverse the disassembly procedure mentioned above. Removing/Replacing the System Top Cover Assembly and the NEC VersaGlide Assembly The procedure for removing and replacing the system top cover assembly and VersaGlide is...

  • Page 77: Removing/Replacing The Led Board

    Field Service Guidelines To replace the whole top case assembly, reverse the removal procedures men- tioned above. We recommend that you do the top cover screws first, then the bottom cover screws. Make sure to test the VersaGlide before entirely securing it to the top cover case.

  • Page 78: Separating The System Board And I/O Board

    4-10 Field Service Guidelines Since the system board is the main unit of the notebook, all of the other boards are connected to this electronic module either by connector or by cable. Special care should be taken when removing this module, so as not to damage any of these connectors and/or cables.

  • Page 79: The I/O Board Module Assembly

    Field Service Guidelines 4-11 Figure 4-5 The I/O Board Module Assembly...

  • Page 80: Removing/Replacing The Power Board

    4-12 Field Service Guidelines Removing/Replacing the Power Board The procedure for removing the power board is as follows: Turn off the computer. Follow all disassembly procedures mentioned from the start of this section. Remove the two hex spacers from the center of the board and lift the module from the unit.

  • Page 81: Versaglide

    4-13 ILLUSTRATED PARTS BREAKDOWN This section contains the illustrated parts breakdown (IPB) and NEC part numbers for the NEC Versa 2400 Series computer. Table 4-1 lists field-replaceable parts and corresponding part numbers. Figure 4-7 shows the field-replaceable parts for the docking station.
  • Page 82 4-14 Field Service Guidelines Table 4-1 NEC Versa 2400 Series Field-Replaceable Parts* Item Description Part Number I/O Board 51-70183-00 I/O Bracket 24-50204-00 810 MB Hard Disk Drive Assembly 25-00237-00 1 GB Hard Disk Drive Assembly 25-00238-00 Diskette Drive Assembly 24-70006-00...

  • Page 83: Nec Versa 2400 Series Illustrated Parts Breakdown

    Field Service Guidelines 4-15 Figure 4-7 NEC Versa 2400 Series Illustrated Parts Breakdown...

  • Page 84: Packaging And Documentation

    Packaging and documentation part numbers are listed in Table 4-2. Table 4-2 Packaging and Documentation Part Numbers Description Model Number NEC Versa 2400 Series User’s Guide 819-200134-000 Rev. 00 NEC Versa 2400 Series Service and 819-200167-000 Rev. 00 Reference Manual (this guide)

  • Page 85: Section 5 Troubleshooting And Repair

    NEC Technologies Technical Support Center (TSC) provides an E-mail service for Internet users besides the support listed in Table 5-1. Technical questions regarding NEC products can be sent over the Internet system to TSC. The Internet address is as follows:...

  • Page 86: Product Information

    Internet or by fax. TSC will reply to all questions received by In- ternet or fax within one business day. PRODUCT INFORMATION NEC FastFacts is an automated electronic information service used to obtain up-to-date product application notes, installation procedures, troubleshooting tips, data sheets, techni- cal information bulletins, price lists, and other information.

  • Page 87: Helpful Starters

    Troubleshooting and Repair Listen to the instructions provided by the automated attendant. Press 1 to skip the FastFacts introduction and jump to the automated instructions for ordering a document or catalog. Press 2 for an introduction to FastFacts, followed by the automated instructions for ordering a document or catalog.

  • Page 88: Power On Self Test (Post)

    Turn the power off, then back and disable A20 on again. If the problem command. persists contact qualified NEC service personnel. Fixed disk configuration The specified Correct the fixed disk error configuration is not configuration.

  • Page 89: Post Error Messages

    Troubleshooting and Repair Table 5-2 POST Error Messages Message Possible Cause Action No boot device available - Either diskette drive A:, Try rebooting. If problem press F1 to retry boot, F2 the fixed disk, or both the persists, replace the diskette for SETUP utility diskette and fixed disk are or the fixed disk.
  • Page 90 Troubleshooting and Repair Table 5-2 POST Error Messages Message Possible Cause Action Keyboard clock line failure The keyboard, the Make sure the keyboard keyboard cable cable and keyboard are connection, or the connected properly. Check keyboard controller is the keyboard controller and defective.

  • Page 91: Informational Messages

    Troubleshooting and Repair Informational Messages This section lists the messages that provide information to the user but require no action. Table 5-3 BIOS Informational Messages Message Meaning nnn K Base Memory The amount of base memory that tested successfully. nnn K Extended The amount of extended memory that tested successfully.

  • Page 92: Run-Time Error Messages

    Troubleshooting and Repair Run-time Error Messages The following table lists run-time error messages. Table 5-4 Run-time Error Messages Message Cause Action I/O card parity interrupt at Memory on a peripheral card Check the memory cards address . Type (S)hut off has failed.

  • Page 93: Quick Troubleshooting

    Troubleshooting and Repair QUICK TROUBLESHOOTING This section summarizes problems that may develop during system operation and lists sug- gested corrective actions. Table 5-5 Quick Troubleshooting Problem Corrective Actions No power Check that the AC adapter is plugged into the power connector of the system. Also, that the AC adapter is plugged into a properly grounded AC power outlet.
  • Page 94 5-10 Troubleshooting and Repair Table 5-5 Quick Troubleshooting Problem Corrective Actions Battery Power does not last Make sure that the power management features are enabled. Recharge the battery pack for 1½ hour before using again. Replace the battery pack. System halts during boot sequence Check condition of selected bootload device (diskette or hard disk) for bad boot track or incorrect OS files.
  • Page 95 Troubleshooting and Repair 5-11 Table 5-5 Quick Troubleshooting Problem Corrective Actions PCMCIA card does not work Check the PCMCIA driver installation for any IRQ or IO address conflict. Check if the PCMCIA card is inserted properly and all connections are set. Replace the PCMCIA card.

  • Page 96: Appendix A Video Modes

    Appendix A Video Modes The C&T 65548 VGA chipset supports high resolution fixed frequency and variable fre- quency analog monitors in interlaced and non-interlaced modes of operation. Digital moni- tor support is also built-in. The tables in this section list all 65548 CRT monitor video modes.
  • Page 97 Video Modes Table A-2 VGA Standard Modes (Graphics Mode) No. of Text Font Pixel Reso- Horiz. Vert. Mode Colors Display Size lution Clock Freq. Freq. 40 x 25 8 x 8 320 x 200 25.175 31.5 40 x 25 8 x 8 320 x 200 25.175 31.5...
  • Page 98 Video Modes VGA EXTENDED MODES The C&T 65548 VGA BIOS supports standard VESA and extended modes, listed in the following table. Table A-5 VGA Extended Modes (Text Mode) No. of Text Font Pixel Dot Clock Horiz. Vert. Mode Colors Display Size Resolution Freq.
  • Page 99 Video Modes Table A-9 VGA Extended Modes (16-Bit Linear Mode) - 1MB Video Memory Only No. of Text Font Pixel Reso- Horiz. Vert. Mode Colors Display Size lution Clock Freq. Freq. 80 x 30 8 x 16 640 x 480 50.350 31.5 Table A-10 VGA Extended Modes (24-Bit Linear Mode)
  • Page 100 Video Modes VGA HIGH REFRESH MODES The following tables list VGA high refresh modes. Table A-13 VGA High Refresh Modes (Packed Pixel Mode) No. of Text Font Pixel Reso- Horiz. Vert. Mode Colors Display Size lution Clock Freq. Freq. 80 x 30 8 x 16 640 x 480 31.5...

  • Page 101: Battery Replacement

    Battery Replacement A lithium battery in your computer maintains system configuration information. In the event that the battery fails to maintain system configuration information, NEC recommends that you replace the battery. WARNING: There is a danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.
  • Page 102 Index Disassembly battery pack, 4-4 CPU, 4-7 AC adapter diskette drive, 4-5 connecting, 1-10 hard disk drive, 4-5 AC power adapter, 3-11 heat plate, 4-7 AC/DC adapter specifications, 2-16 I/O board, 4-9 keyboard, 4-6 LCD, 4-8 Battery LCD status bar cover, 4-6 discharged, 1-5 LED board, 4-9 removing, 1-9...
  • Page 103 Setup utility, 1-15 Microprocessor, 3-3 menu, 1-15 Model configurations, 1-1 Shock specifications, 2-23 Specifications system, 2-1 NEC service telephone numbers, 5-1 Status indicators, 2-13 NiMH battery, 1-9 Status panel LEDs, 1-5 features, 3-11 Subsystems, 3-1 Num lock key, 1-6 System BIOS, 3-3...
  • Page 104 Index-3 System board specifications, 2-7 System configuration diagram, 1-3 System faetures, 1-2 System logic controller, 3-4 System processor, 3-3 System specifications, 2-1 System upgrades, 1-19 Technical support contacting, 5-1 Transfer board specifications, 2-8 Troubleshooting checklist, 5-3 VersaGlide, 1-7 VersaGlide subsystem, 3-10 VGA extended modes, A-3 VGA high refresh modes, A-5 VGA port, 1-12...

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