service manual extensa 450

8/13/2019 service manual extensa 450

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Maintenance Manual

Extensatm450 Series

Notebook Computers9805725-0001

November 1995


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Copyright () 1 9 9 5 Texas Inst rum en ts Inc orporated

All Right s Re se rve d Print ed in U.S.A.

Extensa 4 50 Series Notebook Com puters

Mainte nanc e Manual

TI Part No. 98 05 72 5-00 0 1

Original Iss ue: Nove mber 1 99 5

Changes may be made periodically to the information in this publication.Such changes will be incorporated in new editions of this manual.

No part of this publication may be reproduced, stored in a retrieval system,or transmitted, in any form or by any means, electronic, mechanical,photocopy, recording, or otherwise, without the prior written permission of

Texas Instruments Incorporated.

The equipment, as well as the programs that TI has created to use with

them, are tools that can help people better manage the information used intheir business; but tools including TI products cannot replace sound

judgement nor make the managers business decisions.

Consequently, TI cannot warrant that its products are suitable for anyspecific customer application. The manager must rely on judgement of whatis best for his or her business.

Address all correspondence regarding orders to:

Texas Instruments IncorporatedP.O. Box 61 02 , M/ S 32 55

Tem ple, Texas 76 50 3

Extensa 450, TravelMate, 5000, 4000M, 4000E, 4000 and BatteryPro are trade-marks of Texas Instruments Incorporated. The icons in the Windows Notebook andStartup groups are copyrighted by Texas Instruments Incorporated.BitCom and BitFax are trademarks of BIT Software, Inc.Hayes is a registered trademark and SmartModem2400 is a trademark of Hayes Mi-croComputer Products Inc.IBM, OS/2, AT PS/2, and VGA are trademarks of International Business MachinesCorporation.Intel, and IntelDX4 are trademarks of Intel CorporationLotus is a trademark of Lotus Development CorporationMNP is a registered trademark and Microcom is trademark of Microcom Inc.

Microsoft and Windows 95 are trade marks of Microsoft Corporation.Ethernet is a registered trademark of Xerox Corporation.NetWare is a registered trademark of Novell, Inc.UNIX is a registered trademark of American Telephone and Telegraph.SimulSCAN is a trademark of Cirrus Logic, Inc.


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Contents

Preface

Sec tion 1 Gen eral Des cription

1.1 Introduction. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.2 Product Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1.3 International Product Versions.. . . . . . . . . . . . . . . . . . . . . 1-2

1.4 Product Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1.4.1 External Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

1.4.2 Touchpad Pointing Device . . . . . . . . . . . . . . . . . . . . . 1-6

1.4.3 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

1.4.4 Standard Power Features. . . . . . . . . . . . . . . . . . . . . . 1-8

1.4.5 Wireless Connection With Serial Infrared Port .. . . . . 1-9

1.4.6 Preloaded Software . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1.4.7 Notebook Expansion Capabilities . . . . . . . . . . . . . . . . 1-9

1.5 Standard Test Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

1.6 Notebook Assemblies and Subassemblies. .. . . . . . . . . . . . 1-10

1.6.1 Cover-Display Assembly . . . . . . . . . . . . . . . . . . . . . . 1-11

1.6.2 System Base Assembly .. . . . . . . . . . . . . . . . . . . . . . 1-11

1.7 Extensa 450 Series Notebook Specifications. . . . . . . . . . . . 1-12

1.8 Agency Approvals. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Sec t ion 2 Inst a llat ion

2.1 Introduction. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 Unpacking Instructions . . . .. . . . . . . . . . . . . . . . . . . . . . . 2-1

2.3 Installing Notebook Options . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.3.1 Installing Dual Inline Memory Module(s) . . . . . . . . . . 2-1

2.3.2 Installing PCMCIA Options. . . . . . . . . . . . . . . . . . . . . 2-3

2.3.3 Installing the Port Adapter .. . . . . . . . . . . . . . . . . . . 2-4

2.3.4 Installing the Optional Numeric Keypad . . . . . . . . . . 2-5

2.4Installing the Battery Pack(s ) .. . . . . . . . . . . . . . . . . . . . . . 2-5

2.5Installing External Devices . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

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2.5.1Installing an External Keyboard/Mouse .. . . . . . . . . . 2-6

2.5.2Installing External Parallel Printer .. . . . . . . . . . . . . . 2-8

2.5.3 Installing External Serial Port Device . . . . . . . . . . . . . 2-8

2.5.4Installing External VGA Monitor .. . . . . . . . . . . . . . . . 2-10

2.5.5Installing SIR Devices . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.6Installing the AC Power Adapter . . . . . . . . . . . . . . . . . . . . 2-11

2.7Initial System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.8Configuring the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.9Making Backups of System Software. . .. . . . . . . . . . . . . . . 2-13

2.10 Loading Application Software . . . . . . .. . . . . . . . . . . . . . . 2-13

Sec tion 3 Operating Ins truct ions

3.1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2Notebook Controls and Indicators . .. . . . . . . . . . . . . . . . . . 3-1

3.2.1LCD Brightness Control .. . . . . . . . . . . . . . . . . . . . . . 3-2

3.2.2Button Switches . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 3-2

3.2.3 Cover Release Latch . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.2.4 Touch Pad Controls . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.2.5 Keyboard Mode LEDs. . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.3 Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.3.1 Floppy Drive Operating Procedures . . . . . . . . . . . . . . 3-4

3.3.2 Installing/Removing PCMCIA Options . . . . . . . . . . . . 3-4

3.3.3 Computer Hot Keys . . . . . . . . . . . . . . . .. . . . . . . . . . 3-5

3.3.4 Responding to Low Battery Conditions. .. . . . . . . . . . 3-5

3.3.5 Minimizing Power Usage . . . . . . . . . . . .. . . . . . . . . . 3-5

3.3.6 Recharging the Battery Packs . . . . . . . . . . . . . . . . . . 3-6

3.3.7 Restoring Missing System Files . . . . . . . . . . . . . . . . . 3-6

3.3.8 Rebuilding the System Software. . . . . . . . . . . . . . . . . 3-6

Sec tion 4 The ory of Operation

4.1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2Notebook Functional Description . . . . . . . . . . . . . . . . . . . . 4-1

4.2.1 Processor/Memory Subsystems . . . . . . . . . . . . . . . . 4-1

4.2.2 I/O Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.2.3 Video Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

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4.2.4 Hard Disk Subsystem . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4.2.5 Floppy Diskette Drive Subsystem. .. . . . . . . . . . . . . . 4-9

4.2.6 PCMCIA Subsystem. . . . . . . . . . . .. . . . . . . . . . . . . . 4-9

4.2.7 Power Subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Sec tion 5 Troubles hoo ting Proc edures

5.1 General .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2 Overview of Fault Isolation Process . . . . . . . . . . . . . . . . . . 5-1

5.3 Troubleshooting Procedures.. . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.1 Troubleshooting a Power Supply Problem . . . . . . . . . 5-3

5.3.2 Troubleshooting a Display Problem . .. . . . . . . . . . . . 5-5

5.3.3Fault Isolation Using Selftest . . . . . .. . . . . . . . . . . . . 5-5

5.3.4PCMCIA Modem Problems. . . . . . . . .. . . . . . . . . . . . . 5-55.3.5Fault Isolation Using Diagnostics .. . . . . . . . . . . . . . . 5-6

Sec tion 6 Field Service

6.1Introduction . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2 Preventive Maintenance . .. . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6.2.1 Cleaning the Computer .. . . . . . . . . . . . . . . . . . . . . . 6-1

6.2.2 Protecting the Disk Drives . . . . . . . . .. . . . . . . . . . . . 6-2

6.2.3 Handling the Computer Battery Pack.. . . . . . . . . . . . 6-2

6.2.4 Restoring System Software. . . . . . . . .. . . . . . . . . . . . 6-2

6.3Required Tools and Equipment . . . . . . . . . . . . . . .. . . . . . 6-3

6.4Notebook Field-Replaceable Parts and Assemblies. .. . . . . . 6-3

6.4.1 Cover-Display Assembly . . . . . . . . . . . . . . . . . . . . . . 6-3

6.4.2 System Base Assembly .. . . . . . . . . . . . . . . . . . . . . . 6-4

6.5FRU Removal and Replacement Procedures .. . . . . . . . . . . 6-66.5.1Removing/Replacing the Notebook Battery Pack. . . . . 6-6

6.5.2Removing/Replacing PCMCIA Options . . . . . . . . . . . . 6-7

6.5.3Removing/Replacing the Floppy Drive . . . . . . . . . . . . 6-7

6.5.4Removing/Replacing the Hard Drive .. . . . . . . . . . . . 6-7

6.5.5Removing/Replacing the Keyboard Assembly .. . . . . . 6-8

6.5.6 Removing/Replacing the Heat Sink . . . . . . . .. . . . . . 6-8

6.5.7 Removing/Replacing Memory Modules (DIMMS) . . . . 6-9

6.5.8 Removing and Replacing the Cover-Display Assembly6-10

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6.5.9 Removing and Replacing the Inverter Board. . . . . . . . 6-10

6.5.10 Opening/Replacing the Top Case Assembly . . .. . . . 6-11

6.5.11 Removing/Replacing the Touch Pad Assembly.. . . . 6-11

6.5.12 Removing/Replacing the SIR Board .. . . . . . . . . . . . 6-13

6.5.13 Removing/Replacing the Primary Battery Board . . . 6-14

6.5.14 Removing/Replacing Power Supply Board . . . . . . . . 6-15

6.5.15 Removing/Replacing the Memory Board . . . . . . . . . 6-16

6.5.16 Removing/Replacing the Main Board. . .. . . . . . . . . 6-16

6.5.17 Removing/Replacing the Secondary Battery Board . 6-18

Appe ndix A Se lf-Te s t Error Me s s age s

A.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . A-1

Appen dix B Con ne ct or Pino ut s

B.1 Introduction . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . B-1

Appe ndix C PC-Doc to r Diagno st ics

C.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

C.2 Starting PC-Doctor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

C.3 Keyboard Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

C.4 Mouse Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

C.5 PC-Doctor Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3

C.5.1 Online Help (?). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3

C.5.2 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3

C.5.3 Interactive Tests Menu . . . . . . . . . . . . . . . . . . . . . . . C-4

C.5.4 Hardware Info Menu . . . . . . . . . . . . . . . . . . . . . . . . . C-5

C.5.5 Utility Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5

C.6 Quitting PC-Doctor . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

C.7 Remote Operation . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

vi Contents


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Preface

This manual provides installation, operation and servicing data for theExtensatm450 Series Notebook Computers.

Intended AudienceThis manual is primarily intended for use by qualified service techniciansbut contains information useful to non-technical users.

Contents

This manual contains six sections and multiple reference appendicesincluding:

Section 1: General Description Introduces the main features of thenotebook; provides a list of physical and electrical specifications.

Sec tion 2: Inst allation Describes how to unpack, install optionsand cable up the notebook computer in a desktop environment.

Section 3: Operating Instructions Describes the notebookoperating controls and indicators and modes of operation.

Sec tion 4 : The ory of Operation Describes detailed theory of

operation for Extensa series notebooks.

Sect ion 5: Troubles hooting Provides troubleshooting proceduresfor the Extensa 450 series notebooks.

Section 6: Field Service Provides corrective maintenanceprocedures for the notebook computer.

Appen dix A: Se lf Tes t Error Mes sage s

Appendix B: Conn ec tor Pinouts

Appen dix C: PC-Doc to r Referen ce Data

n Note: Additional appendices will be added at a future date to documentnew members of the Extensa product family.

Oth e r Manuals About th e Sy st e m

The following documents provide additional information related to the

Extensa 450 series:

Preface vii


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Exten sa 4 5 0 S eries Note book Com pute r Use rs Referen ce Manual,

Part No. 9803942-0001; contains reference information regarding theExtensa 450 series software including the TI custom utilities.

Windows 9 5 Help (online)

PC-Doctor Help and Technical Reference (online)

Orde ring Part s and Supplie s

To order a copy of any TI publication or to order option kits, spare parts orsupplies for your system, contact your TI Reseller or:

Telephone Toll-free: 1-800-TI TEXAS

viii Preface


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Sect ion 1

Ge ne ral De sc riptio n

1 .1 Introduction

This manual contains field and factory level servicing information for the TexasInstruments Extensatm450 Series of Notebook Computers (Figure 1-1).

This section provides a general overview and specifications for the Extensa 450Series Notebook Computers.

Figure1 -1 Exten sa 4 50 Series Note book Comput er

General Description 1 -1


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1 .2 Produc t Mode ls

Table 1-1 summarizes the features of the product models initially available in theExtensa 450 product line. Basically, the product models offer a choice of either10.4" Dual Scan Color or 9.4" Active Matrix Color LCDs and a choice of either thebasic Windows 95 operating system or Windows 95 plus applications.

Table 1-1 Extensa 45 0 Series Notebook Com puters

Mode l 4 5 0 Mode l 4 5 0 T Mode l 4 5 5 Mode l 4 5 5 T

10.4" DS LCD 9.4" Active Matrix

Color

10.4" DS LCD 9.4" Active Matrix

Color

Windows 95 Windows 95 Windows 95 Plus

Microsoft Works,

Quicken SE,

Lotus Organizer,

and MicrosoftEntertainment

Pack

Windows 95 Plus

Microsoft Works,

Quicken SE,

Lotus Organizer,

and MicrosoftEntertainment

Pack

1 .3 In te rn atio n al Produc t Ve rs ion s

The Extensa 450 Series Notebooks are available in one of 15 domestic and

international configurations as listed in Table 1-2.

Table 1 -2 . Note book Dome st ic/ Int ernation al Con figurations

Configurat ion P/ N Suffix Configurat ion P/ N Suffix

Domestic -0001 Swedish -0010

UK -0002 Swiss/French -0011

German -0003 Danish -0012

French -0004 Norwegian -0013

Spanish -0005 Finish -0014

Swiss/German -0006 Belgium -0015

Italian -0007 Austrian -0016

Portuguese -0008 Latin American -0018

Western European -0009

1 -2 General Description


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Figure 1-2 Exten sa 4 50 Series Features

1-4 General Description


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1 .4 .1 Exte rnal PortsAs shown in Figure 1-3, the notebook computer contains the following externalports:

Serial Infrared (SIR) Port for wireless connection with a similarly equippedprinter or computer

9-Pin Serial Port for attaching any RS-232 type serial device to the Notebook

15-Pin External VGA Monitor Port for attaching an external monitor

6-Pin PS/2 Port to attach an external Keyboard or Mouse

Second 6-Pin PS/2 Port for attaching an external Keyboard/Mouse

AC Adapter Connector for attaching the AC Adapter to the notebook

Figure 1 -3 Note book External Ports



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1 .4 .2 Touc hpad Pointin g DeviceAll members of the Extensa family feature a built-in Touchpad pointing devicelocated near the center of the keyboards palmrest. With light presure, the cursorcan quickly be positioned to the desired point; a quick double tap on the Touchpadand you have selected an object. Two select buttons (switches) are located along thefront edge of the notebook

.

1 .4 .3 KeyboardThe Extensa Series Keyboard is an 83/84-key, IBM enhanced-type keyboard withthe standard character and function keys plus 12 programmable function keys (F1through F12).

Using the Special Function (Fn ) key which assigns multiple functions to keys, thekeyboard can emulate the IBM 101/102 keyboards using 83 keys (84 oninternational models).

The keyboard has a 2.77 mm stroke and features a special keyboard interface chipthat can detect multiple levels of key input (good simulation of N-key rollover for upto 10 keys).

Some of the major features of the keyboard include:

2.77-mm Key movement

Integrated numeric keypad

Inverted T" Cursor Control Key layout

Figure1-4 Extens a Touchpad



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The notebook keyboard is available in the following versions:

U.S. English - This version (also known as the domestic version) has 81 keysand is generally used in the United States and Canada.

U.K. English - This version (also known as the international version) has 82keys and is generally used in England, Germany, and other Europeancountries with the appropriate keycap changes.

Note: The Extensa Series Notebook Computer Users Reference Manual contains de-scriptions of keyboard special function keys. A six-pin Mini-DIN connector can at-tach to either an external PS/2 keyboard (or 101 Keyboard via an adapter), PS/2Mouse, or the optional PS/2 Numeric Keypad.

1 .4 . 3 .1 Co nt ro ls an d In dic at ors

As shown in Figure 1-6, Extensa Series Notebook Computers contain a set of threebuttons (switches) and five LED displays just above the keyboard including:

Power, Setup, and Standby/ Suspend Buttons (Switche s)

Caps Lockindicator. This LED indicates that the keyboard is locked in theuppercase mode. To switch to the lowercase mode, press the Caps Lockkey.

Num Lockindicator. This LED lights when you press the NumLk key to toggle

on the numeric keypad lock function. When the LED is On, the embeddednumeric keyboard keys generate AT-keypad characters and functions whenpressed in conjunction with the Shift key. When the indicator is Off, pressing

Figure1 -5 Extens a Keyboard



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the Fn key with the appropriate keys provides cursor movement, paging andother functions in the normal mode.

Scroll Loc kindicator. This LED lights to indicate that the keyboard is lockedin the scroll mode.

Hard Disk Drive Activity Indicator.Indicates when notebook is accessing thehard drive.

StandbyIndicator. Lights when Notebook is in Standby mode.

1 .4 .4 St andard Power Feat ure sNotebook power for the Extensa 450 Series Notebook Computers is provided by anAC Adapter and a rechargeable 10.8 V, 2400 mAh Duracell nickel metal hydride(NiMH) battery pack that installs in a power bay near the front of the notebook

(right side).

A second lithium ion battery may optionally be installed in the Floppy Drive baywhen the Floppy Drive is removed from the Notebook.

Figure1-6 Extens a Series Cont rols and Indic ators



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All members of the Extensa 450 family feature TIs patented power managementsubsystem (hardware and software) that provides longer portable operation andprotection of files during low battery conditions.

1 .4 .5 Wire les s Con n e c ti on With Se rial In frare d PortThe Extensa series notebooks are equipped with a Serial Infrared (IR) port thatoffers wireless communication with a variety of IRDA-compliant devices made by

other manufacturers.

Note: Prior to communicating with an external device equipped with a serial infra-red interface, the appropriate third-party drivers must be installed on your note-book.

1 .4 .6 Pre loade d So ftwareAll members of the Extensa 450 Notebook family are preloaded with the Windows95 Operating System. In addition, Extensa Models 455 and 455T come standardwith the following application packages installed:

Microsoft Works

Quicken SE

Lotus Organizer

Microsoft Entertainment Pack No. 4

1 .4 .7 Not e book Expansio n Capabilit iesExpansion capabilities built into the Extensa notebook series include:

User installable expansion RAM memory (to a maximum of 32 MB)

By removing the floppy drive, you can add either a second battery pack or aType III PCMCIA device with option.

A Cable Connect PS/2 Numeric Keypad option, P/N 2581381-0001, can beattached to either of the two external PS/2 Ports.

A parallel device can be attached to the notebooks external 25-pin parallel port(EPP/ECP compatible).

With the port adapter installed (supplied with the notebook), the notebooksexpansion bus is adapted to provide the following external ports:

Serial RS-232 Port for attaching any serial device

External VGA Port for driving an external color monitor

Second PS/2 Port for attaching an external keyboard or mouse



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Third Party External PS/2 keyboard (or external mouse)

1 .5 St andard Te s t Feat ures

The Extensa Series Notebook Computers use modular design and built-in test

features to reduce the mean time to repair. A power on self-test automaticallyverifies the operational state of the primary circuits and a powerful suite ofdiagnostic tests are available to further test selected parts of the system.

1 .6 Not ebook Ass em blies andSubassemblies

The Extensa Series Notebooks are modular in design and can be disassembled for

maintenance purposes using a standard set of flat-bladed, Phillips-head andhexagonal screwdrivers. The major assemblies that comprise a typical notebook inthe Extensa family are shown in Figure 1-7 and briefly described in the followingparagraphs.

Figure 1 -7 Note book Ass em blies



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1 .6 .1 Cove r-Display Ass e m blyThe Cover-Display Assembly contains the LCD screen and associated high voltagepower supply and video circuitry. The Cover-Display Assembly contains threefield-replaceable components including:

LCD Assembly

Inverter Board

Slide Pot/Converter Board

The Cover-Display Assembly attaches to the System Base Assembly through fourtop mounted screws and six mounting screws on the bottom of the computer.

1 .6 .2 Syst em Base Ass em blyAs shown in Figure 1-7, the majority of the notebooks field replaceable units (FRUs)are located in the system base assembly. These FRUs include:

Main Board Assembly

Hard Disk Drive Assembly

Memory Board Assembly

Up to two Dual Inline Memory Modules

Serial Infra-red Board Assembly

Floppy Drive Assembly

Secondary Battery Board Assembly

Power Supply Board Assembly

Battery Pack Assembly

Top Case Assembly

Touchpad Assembly

Keyboard Assembly (removed in Figure 1-7 for clarity)

Battery Board Assembly

General Description 1-11


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1 .7 Exten sa 4 50 Series Note bookSpecif icat ions

Specifications for the Extensa 450 Series Notebooks are provided in Table 1-6.

Table 1-6 Exten sa 45 0 Notebook Features

Spe c ific at ions Mode ls 45 0 / 4 5 0 T Mode ls 45 5 / 4 5 5 T

Memory:

Standard: 4MB 4MB

Maximum 32MB 32MB

Display

LCD Type:10.4" Dual Scan Color 9.4" Active Matrix

Color

Simultane ous LCD/ Ext.

VGAYes Yes

Video RAM Siz e: 512 KB 512 KB

Video Bus VLBUS with Graphics

Accelerator

VLBUS with Graphics

Accelerator

Keyboard/ Pointing

Device,

Ergonom ic Keyboard Yes Yes

Built-In Touc hpad Yes Yes

Storage

Floppy Drive : 3.5", 1.44MB 3.5", 1.44MB

Hard Drive : 340 Million Byte 340 Million Byte

Interfaces

Se rial (RS2 32 ) Port Yes (Port Adapter) Yes (Port Adapter)

Parallel Port

(EPP/ ECP),Yes

Yes

Ext e rnal VGA Port Yes (Port Adapter) Yes (Port Adapter)

External PS2 Ports Yes (2nd PS/2 Port on

Adapter)

Yes (2nd PS/2 Port on

Adapter)

Serial Infrared Port Yes Yes

PCMCIA SupportType I/II (III Optional) Type I/II (III Optional)



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Spe c ific at ions Mode ls 45 0 / 4 5 0 T Mode ls 45 5 / 4 5 5 T

Software Windows 95 Windows 95,plus

applications

Physical Characteristics

We igh t : Approx. 5.0 Pounds(2.27kg) *

Approx. 5.0 Pounds(2.27kg)

Dimensions: 11.7 (L) X 1.7 (H) X

8.2 (W)

11.7 (L) X 1.7 (H) X

8.2 (W)

* Wight specifications

do not include Floppy

Drive, AC Adapter or

2nd Battery

1 .8 Agen c y Approvals

All Extensa 450 Series products meet the following standards:

Underwriters Lab (UL) Standard 1950 (safety)

Canadian Standards Association (CSA) Standard 220 (safety)

FCC CFR 47, Part 15, Subpart J, FCC Level B (EMI)

Canadian Department of Communications (DOC) Certification

VDE 0871, Class B (EMI)

General Description 1-13


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2

Installation

2 .1 Introduction

This section contains unpacking and preparation for use instructions for theExtensa 450 Series Notebook Computers.

2 .2 Unpac king Ins truc tion s

The packaging diagram for the notebook computer is shown in Figure 2-1. Unpack

the computer using the following instructions:

1 .Carefully cut the tape that seals the top flap of the shipping carton.

2 .Remove the computer and the accessories from the main shipping carton.

3 .Remove all protective coverings from the computer.

4 .Remove the holding tape and open up the accessory box; remove the contents.

n Note: Save the shipping containers and packaging for later reuse.

2 .3 Ins tal ling Not e boo k Option s

If you have no options to install at this time, skip to Paragraph 2.3. Otherwise,continue with Paragraph 2.2.1.

2 .3 .1 Ins talling Dual Inline Mem ory Modu le(s)

n Note: If not installing RAM Expansion option at this time, skip to the next para-graph.

c Caution: The Dual Inline Memory Module contains components that aresensitive to static electricity. When handling the module and the inter-

nal parts of the computer, protect against static electricity by usingwrist or ankle grounding straps and grounded working mats. When mov-ing or storing items, use the anti-static bags supplied with the items.

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1 . Ensure that the notebook is powered off and that the AC Adapter and internalbattery pack(s) is (are) removed from the notebook.

2 . Remove the DIMM module(s) from its shipping container.

3 . Release the Keyboard by pulling the keyboard release tabs forward (tabs arelocated underneath the Ctrl and right arrow keys).

4 Disengage the Keyboard using a straight blade screwdrive and gently lifting upalong the front edge of the keyboard.

5 Using the back edge of the keyboard as a hinge, lift the front edge of thekeyboard up and lay it against the display.

6 . Remove the two Phillips head screws holding heatsink to the Main Boardand remove the heatsink by lifting it upwards and out of the unit.

7 . Insert the edge of the DIMM Board into the rear of either available connector(see Figure 2-1). Use a rocking motion to fully insert the module. Pushdownwards on each side of the DIMMs module until it snaps in place.

8 . Replace the heatsink, keyboard assembly and any other components removed instep 1.

This completes the expansion memory module installation procedure.

Figure 2 -1 Ins talling Additio nal Mem ory

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2 .3 .2 Ins tallin g PCMCIA Optio nsThe Notebook has provisions for one Type I or Type II PCMCIA option card.However, a type III PCMCIA device can be installed if the Floppy Drive is removedfrom the notebook and the optional PCMCIA Module is installed..

1 . Review the installation instructions supplied with the PCMCIA option card(s).

2 . Open the Type I/II PCMCIA compartment cover on the left side of thenotebook.

3 . To insert a PCMCIA card, align the card with the socket and slide the cardinto the socket until it locks into place. To install a Type III option, you mustremove the Floppy Drive from the right side of the notebookand install thePCMCIA Option Assembly..

4 . To eject a PCMCIA card, first ensure that the notebook is not accessing thememory card or device. Under Windows 95, go to the Control Panel, PC Cardand direct the card to stop before removing card.

Type III PCMCIA

If Floppy Drive Removed

and PCMCIA Option installed

Type 1 or Type II PCMCIA

Option

Figure 2 -2 Ins tallin g PCMCIA Optio ns

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2 .3 .3 Ins talling th e Port Adapte r

n Note: Skip this paragraph if not installing the Port Adapter at this time.To install the Port Adapter, refer to Figure 2-3 and use the following procedure:

1 Remove the -port adapter and any accessories from its shipping carton .

2 Disconnect the AC Adapter from the notebook (if attached).

3 Open the rear connector door on the notebook and attach the Port Adapter to thenotebook as shown in Figure 2-3.

Figure 2-3 Inst alling th e Port Adapter

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2 .3 .4 Ins tall ing th e Option al Num eric Key padAn optional numeric keyboard can be attached to the notebook via the notebooksPS/2 connector as shown in Figure 2-4.

2 .4 Ins tall ing th e Batt e ry Pack (s )

The standard configuration of the Extensa Notebook is equipped with a singlebattery pack that is inserted from the front right side of the computer. However, ifyou can do without the Floppy Drive, you can use the floppy drive bay to house a

second Lithium Ion battery pack.

To remove or replace the battery pack, follow the steps below.

1 . Power off the notebook, being sure to save your data first.

2 . Locate the battery door (right side of notebook near the front). Press the batterydoor inwards and slide the door toward the front of the notebook; remove the

battery door.

3 . Insert a new or recharged battery pack into the battery compartment bay. Makesure that the contacts are facing up and to the rear of the compartment.Check the label (facing up when inserted) indicating the positive andnegative poles of the battery.

Figure 2 -4 Ins talling the Num eric Key pad option

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c Caution: There is danger of explosion if the battery is incorrectly re-placed. Replace the battery only with the same or an equivalent typerecommended by the manufacturer. Discard used batteries according tothe manufacturers instructions.

2 .5 Ins tall ing Ext e rnal Devic e s

Most external devices connect to the Notebook via the connectors on the rear of thenotebook and on the rear of the Port Adapter supplied with the notebook (see Figure2-5 for port assignments).

2 .5 .1 Ins tall ing an External Key board/ Mous e

As shown in Figure 2-6, the notebook has provisions for two external PS/2compatible devices (keyboard, mouse, etc.) that may be attached to the notebook.

The pinouts for the 6-pin Mini-DIN connectors are also provided in Figure 2-6.

Figure 2 -5 Exten sa Port Ass ignm en ts

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To install an external keyboard or external PS/2 mouse on the notebook, use thefollowing procedure:

1 . Ensure that the notebook is powered off.

2 . Locate the external PS/2 ports at the rear of the notebook (see Figure 2-6).

3 . Attach the PS/2 cable from your mouse and/or keyboard cable to the PS/2

port(s).

4 . Power on any other peripheral devices you may have connected to the notebook,and then power up the notebook.

PS/2 Ports

Figure 2-6 PS/ 2 Port Ass ignments / Pinouts

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2 .5 .2 Ins t alling Ext ernal Paralle l Print erThe Notebook is equipped with a bi-directional, ECC/EPP compatible, 25-pinparallel printer port. The connector pinouts and connector location are shown inFigure 2-7.

If you will be using a parallel interface, connect the 25-pin male connector of your

printer cable to the 25-pin female parallel port on your notebook. Refer to themanual which accompanied your printer for instructions on configuring youroperating environment

2 .5 .3 Ins tall ing External Serial Port DeviceThe notebook contains an RS-232 serial port with a male DB-9 connector as shownin Figure 2-8. The serial ports are used to interconnect such devices as:

External Modem

Serial Printer

Any device that uses an RS-232 interface

To connect a printer to the notebook, ensure that both the notebook and the printerare turned off.

Figure 2 -7 Parallel Port Loc ation/ Pinouts

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c Caution: Never connect a parallel device to a serial port or a serial de-vice to a parallel port or video port; this may cause damage to the Note-book and/or peripheral device. If you are uncertain of what typeconnector the external device has, refer to the technical manual for the

external device.

Figure 2 -8 Serial Port Locat ion/ Pinouts

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2 .5 .4 Ins talling Exte rnal VGA Mon ito rThe notebook is capable of driving both its internal LCD display and an externalVGA monitor (LCD only, simultaneous, or VGA only). The external monitorconnector pinouts and connector locations are shown in Figure 2-9. To install anexternal monitor with the notebook, use the following steps:

1 . Ensure that both the notebook and the external monitor are turned off.

2 . Locate the 15-pin female VGA port on the Port Adapter.

3 . Attach the appropriate end of the monitor cable to the VGA port on yournotebook. If the monitor cable connectors have retaining screws, tightenthem down.

4 . If necessary, connect the monitor power cable to the monitor, and plug themonitor power cable into an electrical outlet.

5 . Power on the monitor, as well as any other peripheral devices connected to thenotebook; then power up the notebook

2 .5 .5 Ins tall ing SIR Device sThe Serial Infrared (IR) port offers wireless communication with a variety ofIRDA-compliant devices made by other manufacturers. Ensure that the third-partymanufacturer supplies you with the appropriate IR drivers before attemptingconnection.

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2 .6 Ins talling the AC Power Adapte r

Use the following procedures to connect the AC Adapter to the system:

cCaution: Use only the AC Adapter supplied with the computer; otheradapters can damage the unit.

1 . Remove the AC adapter from the packaging. Connect the round coaxial connectorsupplied with the notebook to the power receptacle on the rear of thenotebook as shown in Figure 2-10.

2 . Connect the female side of the AC Power cord to the AC Adapter and connect themale end to a grounded AC outlet.

Figure 2 -9 Exte rnal Mon ito r Port Pinou ts

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2 .7 Ini t ial Sys te m Che cko utAfter youve installed all internal options and external cabling, youre ready forsystem checkout and software configuration.

To check out the system, set the power switch on the notebook to the On (I) positionwhich initiates the notebook self test. During self test execution, the computerchecks the operation of all key hardware including memory and CPU (and displayscopyright and version number data during test execution).

Upon successful conclusion of self test, the computer automatically loads itsoperating system and Windows environment. If self test fails to complete and anerror message is displayed, try powering down the computer for a couple of minutesand turning power back on to repeat self test. If the error message persists, seeSection 6 for troubleshooting information.

2 .8 Con figuring th e Sys te m

The first time you power up the notebook, it automatically runs the Setup Programwhich prompts you for country name and printer type. You exit Windows and thenotebook begins unzipping files and preparing the software for use. Then it gives

you the option of keeping or removing the video.

Figure 2 -10 AC Adapte r Ins tallatio n

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2 .9 Making Backu ps of Sys te mSoftware

The Notebook is preloaded with Windows 95 operating system software. Prior toextended use of the notebook, create a backup set of system software using theBackup Utility under Windows 95. In the event of a disk problem, you can restore

your system using the Restore Utility and the set of backup diskettes youve justcreated.

2 . 1 0 Loadin g Applicat ion So ftware

For assistance in loading Application Software, refer to Chapter 5 in the ExtensaSeries Notebook Computer Users Reference Manual.

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3

Operating Ins truc t ion s

3 .1 Introduction

The first two subsections describe the Extensa 450 Series Notebook operatingcontrols and indicators. The remainder of this section contains a summary ofcomputer operations related to notebook maintenance including how to restoresystem software.

n Note: For additional operating instructions, see Extensa 450 Series Notebook Com-puter Users Guide, TI Part No.9803942-0001.

3 .2 Not e boo k Con trols and In dicat ors

The Extensa Series Notebooks are equipped with the following controls andindicators:

Group of five LEDs just above the keyboard (Sleep Mode, Hard Drive Activity,Num Lock, Caps Lock and Scroll Lock)

Power, Setup, and Standby/Suspend buttons adjacent to the status LEDs

Single Power LED on the leftrear corner of the notebook

Touch Pad and two select buttons at base of keyboard

Contrast Switch on Display Assembly (Dual Scan models only)

These controls and indicators are shown in Figure 3-1 and described in greater

detail in the following paragraphs.

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3 .2 .1 LCD Con t ras t Con t rolThe TFT version of the notebook contains no operating controls or indicators. TheDual Scan version of the display contains a contrast switch on the lower right sideas shown in Figure 3-1.

3 .2 .2 Button SwitchesThe notebook contains two button switches above the keyboard including:

Power On/ Off Switch- Alternate action, button type switch that controls powerto the unit.Pressing the Power button causes power to be applied to thenotebook and power up self test to be run. The PWRLED (left rear corner ofnotebook) glows green and the computer then loads Windows 95. When thePower button is pressed again, the Notebook powers down and all data in RAMmemory is lost.

Standby/ Suspend Button Switch- an alternate action touch switch that

invokes the save to disk feature and places the unit in Standby Mode (ifpreviously On) or On if previously in Standby Mode.

Figure 3-1 Extens a Series Cont rols and Indicato rs

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3 .2 .3 Cove r Release Latc hThe Notebook contains one Cover Release latch . To open the notebook, slide theRelease Mechanism to the right and lift up on the front edge of the notebook cover.

3 .2 .4 Touc h Pad Con trols

The Extensa 450 Series Notebook Computers are equipped with a built-in mousedevice called the Touchpad physically located at the bottom of the keyboard (seeFigure 3-1).

The cursor is positioned by touching and draging your finger in the direction youwant the cursor to go. The select functions are performed either by tapping thetouch pad or by pressing the two buttons (switches) at the bottom of the keyboard.

You can change the operation of the pad by changing values in the mouse section ofthe Windows 95 Control Panel. Once your cursor is in the proper place and you

want to select, use the left button to click or double click just as you would a mouse.

3 .2 .5 Key board Mode LEDs

The Notebook contains three keyboard mode indicators just above the keyboardon the left side (notebook cover open). These LEDs include:

CAP (Caps Lock)Indicator- this LED indicates that the keyboard is locked inthe Uppercase mode. To switch to the Lowercase mode, press the Caps Lockkey on the keyboard.

NUM (Num Lo c k) Indicator- This LED lights when you press the Fn-F7(NumLk) keys to toggle on the numeric keypad lock function. When the LED isOn, the embedded numeric keyboard keys generate AT-keypad characters andfunctions when pressed in conjunction with the Fn key.

When the NUM indicator is Off, pressing the Fn key with the appropriate keysprovides cursor movement, paging and other functions in the normal mode.

When the NUM indicator is On, the embedded numeric keypad becomes atemporary numeric keypad that does not require you to press any other key.

SCRL (Sc roll Loc k) Indicator- This LED lights to indicate that the keyboard islocked in the scroll mode.

3 .3 Ope ratin g Proc e dure s

Some of the operating features useful for notebook maintenance are provided in thefollowing paragraphs. For additional operating instructions, refer to the Extensa450 Series Notebook Compu ter Users Man ual,Texas Instruments Part No.9803942-0001.

3 .3 .1 Floppy Drive Operatin g Proc edu resTo avoid damaging the floppy drive drive, and to protect data, take the followingprecautions:



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3 .3 .4 Respo nding to Low Batt ery Con dition sThe computer generally will notify you when you are reaching a low batterycondition by the following:

Four short beeps per minute (unless battery warning is disabled)

The battery low warning is automatically disabled when the AC Adapter is installedon the notebook regardless of the charge condition of the battery pack.

If the AC adapter is not plugged in within threeminutes of a detected battery lowcondition, the notebook enters Suspend mode. When the notebook enters SuspendMode, it issues one beep,saves contents of RAM to disk and powers down the unit.

The Notebook returns to the normal operating mode when the power switch isactivated. Unit then recovers RAM information from the hard drive and restoresunit to previous "On" condition.

3 .3 .5 Minim izin g Power Us ageThe following actions can minimize power usage and protect your work during thecritical minutes before you shut the system down or replace on the battery packs

with a fully charged pack:

Press CTRL-STANDBYto shut off the alarm (if its enabled)

Save RAM Disk (if using RAM Disk feature)

Press Standby/ Suspendbutton to put the computer in Standby/suspendmode whenever you are not actively using the computer. This will save all your

work and remember the application and file you were previously using whenyou return to the On condition.

Power down the system if you do not need the computer

3 .3 .6 Rech arging th e Batte ry Packs

A standalone battery charger option is available to charge notebook battery packs.The battery packs may also be charged in the notebook as follows:

1 . Install the battery pack in your computer (if not already installed).

2 . Connect the AC Adapter as described in Section 2.

3 . To fully charge the battery pack, leave it charging in the Notebook for at leastanother 90 minutes.

3 .3 .7 Resto ring Miss ing Sys te m FilesWhen you power up the Notebook, it automatically checks for certain key files that

must be present for normal system operation. If any of these files are accidentlyerased as indicated by error message, insert the Windows 95 Startup Diskette andreboot the system. This will allow you to boot up and troubleshoot your system.



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Figure 4 -1 Note book Funct ional Block Diagram

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Table 4 -1 Exten sa Series I/ O Addres s Map

Addre s s Ran ge De vic e

000-00F DMA Controller 1

020-021 Interrupt Controller-1

022-023 M1429 Registers

040-043 Timer 1

060-06E Keyboard Controller 8742 Chip Select

070-071 Real Time Clock and NMI Mask

080-08F DMA Page Register

0A0-0A1 Interrupt Controller 2

0C0-0DF DMA Controller-2

1F0-1F7 Hard Disk Select

178,,17A 6377 Registers

1F0-1F7 Hard Disk Select

3F6,,3F7,

278-27F Parallel Port 3

35F, 36F Special I/O Ports

378,,37A Parallel Port 2

3BC-3BE Parallel Port 1

3C0-3C5

3C6-3C9 Video DAC

3C0-3CF Enhanced Graphics Display

3D0-3DF Color Graphics Adapter

3E0-3E1 PCMCIA Controller

3F0-3F7 Floppy Disk Controller

3F8-3FF Serial Port 1

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Table 4 -2 DMA Chan ne ls

Contro lle r Channe l Addre s s Fun c t ion

1 0 0087 Spare

1 1 0083 Spare

1 2 0081 Diskette

1 3 0082 Spare

2 4 Cascade Cascade

2 5 008B Spare

2 6 0089 Spare

2 7 008A Spare

Table 4-3 IRQ Int e rrupt Le ve ls

Priorit y Int e rruptNumber

Int errupt Source

1 SMI Power management unit

2 NMI Parity Error Detected,,I/O Channel Error

3 IRQ0 Interval Timer,,Counter 0 Output

4 IRQ1 KeyboardIRQ 2 Interrupt from controller 2 (cascade)

5 IRQ8 Real Time Clock

6 IRQ 9 Cascaded to INT 0AH (IRQ 2)

7 IRQ10 Reserved

8 IRQ

11,Reserved

9

IRQ 12,PS/2 Mouse

10 IRQ13 INT from Coprocessor

11 IRQ14 Hard Disk Controller

12 IRQ15 Reserved

13 IRQ3 Serial Comm

Port 2

14 IRQ4 Serial Comm Port 1

15 IRQ5 Reserved

16 IRQ6 Diskette Controller

17 IRQ7 Parallel Port

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Includes protection circuit against damage caused when printer ispowered up, or operated at higher voltages

Integral IDE controller

Provides a complete IDE interface with DMA control (except foroptional buffers)

Integral address decoder- provides selection of all primary and secondary ISAaddresses including COM1-4 and LPT1-3.

Enhanced Power Management Function

Special configuration registers for power down

Enhanced programmable power-down and wake-up modes

Auto power-down and wake-up modes

3 special pins for power management

Typical current consumption during power-down is less than 10A

4 .2 .3 Video Subsy st emThe video subsystem, implemented on the Main Board and on the LCD DisplayUnit, displays text, graphics and drives an external VGA port. The video subsystemis implemented with a Cirrus Logic 6245 high performance flat panel/RT VGAcontroller and supporting logic and video RAM (512KB).

The major features of the VGA controller include:

Highly integrated design (flat panel / CRT VGA controller, RAMDAC, clocksynthesizer)

Multiple Bus Architecture Integrated Interface

Local Bus (32-bit CPU Direct and VL)

EISA/ISA (PC/AT) 16-bit Bus

Advanced frame buffer architecture uses available display memory, maximizingintegration and minimizing chip count

Integrated programmable linear address feature accelerates GUI performance

High performance resulting from zero wait state writes (write buffer) andminimum wait state reads (internal asynchronous FIFO design)

Supports panel resolutions up to 1280 x 1024 resolution including 800x600and 1024x768

SMARTMAP intelligent color to gray scale conversion enhances text legibility

Text enhancement feature improves white text contrast on flat panel displays

Fully Compatible with IBM VGA

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4 . 2 . 3 . 1 Extern al VGA Drive Cap abi li ty

On the Extensa 450, the external VGA port is provided by the port adaptor fixturein the form of a 15-pin, female, D-type connector which can be used to drive anexternal CRT (standard VGA modes with resolutions of 800 X 600 X 256, or 640 X480 X 256 ).

4 .2 .4 Hard Disk Subsys te mThe Hard Disk Subsystem, controlled by the IDE interface compatible NS87334VJG Super I/O Controller on the Main Board, provides disk storage for all systemsoftware and user files. Initially, the 450 Series Notebooks are equipped with a 340Million Byte hard drive. However, the onboard controller can support high capacitydrives.

During the manufacturing process, Texas Instruments formats the hard disk andthen loads all supplied software including Windows 95.

c Caution: Formatting the disk drive erases any data that may be storedon the disk. Therefore do not attempt a format of the hard disk unlessthe computer self-test and diagnostics confirm that the disk has notbeen formatted.

A Hard Drive activity LED is located along the front edge of the notebook. This LEDlights during hard driver read/write accesses.

c Caution: The notebook should not be moved when the HDD LED is lit toprevent accidental damage to the hard drive.

4 .2 .5 Floppy Diske tt e Drive Subsy st emThe Floppy Diskette Drive Subsystem consists of a Floppy Controller and the FloppyDiskette Drive. The Floppy Diskette Drive can read/write standard 3.5-inchminidiskettes.

4 .2 .6 PCMCIA Su bsy s te mThe notebook is equipped with an on-board PCMCIA host adapter (CL-PD6722PCMCIA Controller) and sockets to support one Type I or Type II option or a Type III

option if the Floppy Drive is removed from the unit. The PCMCIA Controller has thefollowing features:

Single-chip PCMCIA host adapters

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Direct connection to ISA (PC AT) Bus

Direct connection to PCMCIA 2.0 Bus

PCMCIA 2.0- and JEIDA 4.1-compliant

82365SL-compatible register set, ExCA-compatible

Automatic Low-power Dynamic Mode for lowest power consumption

Programmable Suspend Mode

Five programmable memory windows per socket

Two I/O windows per socket

Programmable card access cycle timing

8- or 16-bit CPU interface

8- or 16-bit PCMCIA interface support

ATA disk interface support

Automatic flash memory timing support

Easy host interface using ISA I/O addresses 03E0h, 03E1h

Mixed-voltage (3.3V or 5V) operation

Dual-socket-interface, 208-pin QFP

4 .2 .7 Power Subsy st emThe Power Subsystem consists of the following major parts:

Power Management (hardware and software components)

AC Adapter

Primary Battery Board

Primary Battery Pack

Secondary Battery Board

Secondary Battery Pack

4 .2 .7 .1 Powe r Manage m ent

The notebook is equipped with a power management function that minimizes

battery usage for prolonged battery operation and automatically recharges thebatteries when the notebook is used with an AC adapter.

The power management modes and warnings include the following:

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LCD standby mode

Hard disk standby mode

System standby/suspend mode

Battery-low warning

Standby/suspend upon battery low

4 .2 .7 .2 AC Adapte r

The notebook uses an AC adapter with built in over voltage and short circuitprotection.

The adapter can with stand a continuous short-circuit to DC output withoutdamage to the notebook logic components. The adapter operates in shut down mode

shorting Vo trail and resets to the normal power mode after the fault condition isremoved.

4 .2 .7 .3 Prim ary Bat te ry Pac k

The Extensa Series Notebooks use the Duracell DR35 as the primary battery pack.Specifications for the Primary Battery Pack are provided in Table 4-4.

Table 4 -4 Primary Battery Pack S pecification s

Func t ion Spe c ific at ions

Battery type NiMH (Nickel Metal-Hydride)

Cell structure 9 cells per pack (in series)

Nominal voltage 10.8 V

Cell energy capacity,

Typical,

Minimum

2400 mAH

2500 mAH,

2330 mAH,

Nominal rated capacity 27 Watt-hours

Operating Temperature_,

Discharge,

Charge

-20 to 50C (at 95%RH),

0 to 45C (at 95%RH),

Charge and discharge

cycles

500 (minimum),

Weight 470 grams

Battery discharge time 3 hours (with APM)

Battery charge time

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4 .2 .7 .4 Se co ndary Bat te ry Pac k

As an optional feature, the Floppy Drive can be removed from the notebook and aLi-Ion (Lithium Ion) secondary battery pack can be installed in the same cavity to

provide additional battery operating time.

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5

Troubleshooting Procedures

5 .1 General

This section provides the following information:

Overview of the fault isolation process

Guidelines for isolating computer malfunctions to replaceable subassemblies

Instructions for executing diagnostics and interpreting error messages.

5 .2 Ove rvie w of Fault Is olatio n Proc e s s

The fault isolation process (summarized in Figure 5-1) consists of the following:

Quick Check of the following:

Notebook power system (including battery packs and AC Adapterconnections)- See Paragraph 5.4.

Switch settings (ensure Powerswitch is On, and pressStan dbyswitch to ensure that Notebook is not in Standby mode; press Shiftto ensure the notebook is not in Auto-Suspend mode.

All external cabling (if any)

Check LCD Contrast adjustment (Dual Scan version only)

Record and attempt to resolve any displayed error messages/LED indications(See Paragraph 5.3 and Table 5-1)Record and attempt to resolve any series of beeps emitted from the notebookindicating test failure (See Table 5-2)

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START

COMPUTER

TROUBLE

INDICATION

?

DEAD

COMPUTER

SYMTOMS

?

RUNSELF TEST

ERROR

MESSAGE

?

MODEM

PROBLEM

?

RUN

DIAGNOSTICS

DIAGNOSTICS

ERROR MSG

?

NO

YES

NO

YESSEE PARAGRAPH

5.3.5

NO

YESSEE PARAGRAPH

5.3.4

NO

SEE

PARAGRAPHS

5.3.1 & 5.3.2

NO

WHEN POWER SWITCH

SET TO ON,, NO

INDICATION OF POWER;

SCREEN DARK, STATUS

LED's EXTINGUISHED

SET POWER SWITCH

TO ON. SELFTEST

AUTOMATICALLY RUNS

YES

See Appendix D(PC Doctor)

Figure 5 -1 Troublesho otin g Flowch art

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Try rebooting the system (CTRL-ALT-DEL); restore system from diskettes, ifnecessary.

If the computer is capable of running the Setup program; check the serial andparallel port configurations, and other features that may affect systemoperation.

Run Diagnostics to further isolate problem area (See Paragraph 5.3.5).

For indicated hardware failures, cycle power and repeat self test to verify that ahard failure has occurred.

Remove and replace suspect hardware (as described in Section 6 of thismanual) and retest the system using the diagnostic tests as described inparagraph 5.3.5.

The detailed block diagram, shown in Figure 5-2, is useful in performing faultanalysis of various internal subsystems. For example, an LCD hardware problemcan be traced to either the LCD, Inverter Board, VR Board, or Battery Board. Othersubsystem problems can be isolated in a similar fashion using the detailed blockdiagram as a troubleshooting tool.

5 .3 Trou bles ho ot ing Proc e dure s

The built-in self test program and the disk resident diagnostics program (PC-Doctor)are useful tools in computer troubleshooting. However, if the computer has a power,keyboard or display problem, you first solve this problem before runningdiagnostics. If the computer powers up and displays messages on the LCD or emitsa series of beeps, skip to Paragraph 5.4.3 for further instructions.

5 .3 .1 Trou ble sh oo t ing a Power Supply Problem

If the computer does not power up when the Power Switch is set to the ON position,you most likely have a malfunction in the power subsystem (loss of power at the ACOutlet, faulty AC Adapter, discharged Battery Packs, or faulty Power Supply Board).

With a power problem, all LEDs are extinguished, the LCD screen is blank, thesystem does not respond when the standby switch several times consecutively andno drive activity can be heard. The computer is unable to load software and

displays no visible signs of activity.

To fault isolate a power problem, check the following:

AC Adapter and Battery- Plug in the AC adapter and double check allconnections on the Adapter and computer. Ensure that the Notebook Powerswitch is set to the On position and that the system is not in Standby or sleepmode.

Measure the voltage at the AC Outlet or plug in a known good appliance (EG. alamp) to verify that voltage is present. If the voltage is O.K., try replacing the

AC Adapter

Check to see that the battery pack is installed correctly (try using a rechargedbattery pack if batteryis discharged).



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LCD standby mode - If the LCD backlight remains off, even with the ContrastControl set to its highest position, the LCD may be in Standby Mode . Press theStandbyor Powerbutton to power up the system.

Notebook Set for External Monitor- use CMOS Setup to reset notebook.

LCD - Replace the cover-display assembly as described in Section 6 of thismanual.

Low battery - Use a fully charged battery.

5 .3 .3 Fault Iso lation Usin g Selftes tWhen the computer is first powered up, it automatically performs a self-test of itscentral hardware and memory functions. During self-test (which lasts for a fewseconds), the display shows copyright and version number information.

n Note: Some procedures in this paragraph require you to use keystroke se-quences, such as Ctrl-Alt-Del. To execute a keystroke sequence such asthis, you must press all three keys simultaneously.

5 . 3 .3 . 1 Se lf Te s t Erro r Me s s age s

Upon successful completion of the self-test, the computer automatically loads itsoperating system and other built-in utilities. If the self-test fails to completesuccessfully, the display shows one of the error messages described in Appendix A.

5 .3 .4 PCMCIA Mode m Problem sIf an optional PCMCIA modem does not work properly, check the following items:

Proper installation of any PCMCIA options (check Modem settings underControl Panel).

Dialing problem or wrong number - Try dialing a number that you havepreviously dialed successfully.

Faulty phone line - Connect a telephone to the line and listen for a dial tone.

Software program - Check to ensure that you have installed the softwarecorrectly.



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5 .3 .5 Fault Iso lation Usin g Diagnos tic s

PC-Doctor supplied with the Extensa 450 Series Notebooks is a powerfuldiagnostics tool that can help you scan an internal RAM system for viruses,determine the hardware configuration of a local or remote system, benchmark its

performance, analyze the performance of all subsystems, and perform a suite ofinteractive and non-interactive tests on attached devices. The test results are storedin a log which can be printed out (by pressing F2) or saved in a disk file (by pressingF3).

Features of the diagnostic program are accessed through a series of pull-downmenus and basic keyboard keys (cursor keys to move highlighted pointer, Enter keyto select a highlighted feature, ESC key to cancel a function and move back onelevel.

PC-Doctor is typically user friendly but if you dont understand a feature,context-sensitive help information is available at any time by pressing the F1function key; pressing the F1 function key twice accesses the online TechnicalReference Manual for PC-Doctor.

A powerful set of utilities within PC-Doctor (that can be run locally or remotely)simplify the task of determining system configuration data, allocating and usingsystem memory, IRQ and DMA use, what device drivers are installed, what COMand LPT ports are assigned and what ports are available, identifying partitioningdata for fixed disk drive(s), determining the VGA setup information, reading thesoftware interrupts/interrupt vectors, etc.

Functionally, PC-Doctor includes the following:

Group of nine non-Interactive diagnostic tests that perform a non-destructivetest of the major hardware functions in the notebook (Processor, Memory,System board, video section, serial and parallel ports (when loopback adaptersare installed), hard disk and floppy disk.

Group of seven Interactive tests (require operator input) for testing thekeyboard, video sections, sound subsystem, mouse, joystick, diskette drive,printer subsystem and SCSI/CD-ROM Drive subsystems.

Utility that provides detailed system information such as configuration data,

allocation and use of system memory, IRQ and DMA use, what device driversare installed, what COM and LPT ports are assigned and what ports areavailable, partitioning data for fixed disk drive(s), VGA setup information,software interrupts and interrupt vectors.

Group of special purpose utilities to run other tests from PC-Doctor, perform avirus scan of the internal RAM system, edit configuration files, surface scanhard drives, measure system performance, open a DOS prompt, providesterminal access to devices connected to serial ports, supports memory debugoperations, enables remote operations, permits deep discharge of notebook

batteries and provides an extensive test reporting function.

The PC-Doctor diagnostic program contains a group of nine non-Interactivediagnostics, available from the Diagnosticsheading in the main menu, thatpermits testing various hardware sections without operator input. You can selectone, several, or all tests from the Diagnostics menu. These tests arenon-destructive; the serial and parallel port tests require disconnecting external

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devices from your notebook and installing loopback plugs. The Non-Interactive testcategories include:

CPU and Co-Processor Tests

Base RAM memory test

System Board test

Video Test

Com1 and LPT1 serial port tests

Parallel Port Test

Fixed Disk test

Diskette Drive tests

Other devices (Sound card, PCMCIA options, etc.)

Inte ractive Tes ts

The PC-Doctor diagnostic test includes a suite of seven Interactive tests that requireoperator input during the course of the test. The Inte ractive Test s categoryincludes:

Keyboard- tests the keyboard keys, LEDs and repeat function

Video-tests the LCD and external VGA character sets, and colors.

Speaker-tests the volume response at different frequencies.

Mouse -tests the mouse driver, buttons and functionality

J o y s t i ck- calibrates the external joystick connected to the systemand tests the joystick buttons

Disket te Drive- checks diskette drive functionality

Maximum Syst em Load- thoroughly exercises system to themaximum extent possible for performing system burn-in and test

Printer Test - tests the operation of a connected printer

SCSI Tes t - sends test codes to attached SCSI devices (requires useof a Docking System with SCSI)

CD-ROM Te s t - checks out any attached CD-ROM Drive (requiresattachment of a Docking System with CD-ROM capability)



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Supporting Online docum en tation

The PC-Doctor Diagnostic contains the following online information sources:

Online Technical Manual- selected at any time by pressing F1 key twice or byclicking on the Question Mark in the upper left hand corner of any PC-DoctorMenu

On-line Help system that provides context sensitive information from everyPC-Doctor screen- accessed by pressing F1 key once (pressing F1 twice gets

you into the online manual)

5 . 3 .5 . 1 Us e r In t erfac e t o PC-Do c to r

PC-Doctor is structured as a text-mode, windowed user interface with pull-downmenus. Program operation requires the use of the following keys:

Cursor Keys- move the highlighted pointer

ENTER Key- Selects the highlighted option

ESC Key- Cancels current function and goes back one step

F1 Key- Activates the context-sensitive help feature (pressing F1 twice in a rowcalls up the online Technical Reference Manual for PC-Doctor)

Scrolling windows, which show the results of various operations, use the followingkeys:

Page Up/Page Down- moves the screen one page at a time

F2- Prints the log to PRN

F3- saves the log to a file

You can also use the mouse or Point to interact with PC-Doctor. The leftmost Selectkey is used to choose objects (menu entries and action codes typically enclosed in

brackets). The rightmost Select key is equivalent to the ESC key which takes youback to your previous step.

5 . 3 .5 . 2 Cre at in g a Bo o t able Flo ppy Dis k e t te

Prior to using PC-Doctor, create a bootable floppy diskette using the followingprocedure:

1 . Power up the unit; when unit displays message, "Starting Windows 95", pressF8. Choose Command Prompt Only from menu.

2 . Using DOS, format a floppy diskette.

3 . From the A:prompt, copy the basic MS-DOS files to the diskette using the

following command:

F o rm a t A: / F:1 4 4 0 / S

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Where the value 1440 is the capacity of the diskette (1.44 MB in this example).

4 . Get into the PC-Doctor directory ( type CD C:\ PCDR and pressEnter)

5. Copy the PC-Doctor files to the bootable diskette using the followingcommand:

XCOPY C:. A:.

After completion of this procedure, you should have a bootable diskette containingPC-Doctor.

5 .3 .5 .3 Run nin g PC-Do ct or

PC-Doctor is a DOS-resident program that can be run from either hard disk or fromthe bootable diskette you previously created.

1 . From the C:\ prompt change directory (type CD C:\ PCDR) and press Enter

2 . The Diagnostics Program loads into system memory, and the LCD displays thediagnostics Header.

n Note: There are a number of command-line switches that can be enteredwhen starting up PC-Doctor to enable automatic virus scanning, enableloopback testing of serial/parallel ports, work from the remote menu if per-forming remote operations, etc. To get a listing of the available command-line switches, startup PC-Doctor with the following command:

PCDR / ? and press Enter.

n Note: If PC-Doctor detects a virus, it will stop with an error message. Youmust then use one of the standard virus detection and removal programs toremove the virus.

5 .3 .5 .4 Quit tin g PC-Do ct or

To exit PC-Doctor, Select the Quit pull down menu and then select the Quit to DOSoption.

n Note: For additional information, press F1 twice to access the o nl ine Refer-en ce m anual for PC-Doc to r.



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6

Fie ld Se rvic e

6 .1 Introduction

This section contains preventive and corrective maintenance procedures for theExtensa 450 Series Notebook Computers. The first part of the section describes thecomputer cleaning procedures and preferred handling procedures for sensitivecomponents (e.g. disk drives, batteries).

The second part of the section identifies all field replaceable parts; the remainder of

the section contains removal and replacement procedures for the field replaceableparts.

6 .2 Prev e nt ive Mainte nan c e

Preventive maintenance is limited to cleaning the plastic case, the keyboard, andthe display screen.

6 .2 .1 Cleaning the Com puterWhen it is necessary to clean the plastic case and keyboard, use a soft, lint-freecloth, slightly dampened with a mild detergent solution or use the contents of anycommercially available computer cleaning kit.

c Caution: Never use alcohol, petroleum-based solvents, or harsh deter-gents to clean your computer. Also never spray any liquids directly onthe computer case, keyboard, or screen. If the liquid-crystal display

(LCD) screen has become smeared or dusty, clean the screen by first ap-plying a mild glass cleaner to a soft, clean, lint-free cloth, and gentlywipe the glass. Never apply liquids directly on the screen surface.

c Caution : Do not use paper towels to clean the display screen. Paper canscratch the display screen matte.

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6 .2 .2 Prot ec tin g th e Disk DrivesTo protect the disk drives and data, back up the system disk periodically on floppydiskettes. Periodically use a head-cleaning diskette in the floppy diskette drive toprolong the life of the drive and to help maintain data integrity.

6 .2 .3 Handling th e Com pute r Batte ry PackThe battery pack furnished with the computer requires reasonable care andhandling to ensure efficient operation and maximum life. Periodically inspect the

battery terminals and the batteries for evidence of corrosion and oxide build-up;clean if necessary.

To ensure that the battery pack endures a normal life cycle, always observe thefollowing precautions when handling the battery pack:

Do not drop the battery pack or subject it to excessive shock and vibration.

Do not expose the battery pack to direct sunlight, moisture, or chemicalcompounds.

Do not disassemble the battery pack.

Do not use the battery pack to power other devices.

Do not short the battery leads or connect the battery with reversed polarity.

Never attempt to charge the battery pack in any way other than as described inthis manual.

Always charge the battery pack as soon as possible after a low batteryindication.

6 .2 .4 Rest oring Sys te m SoftwareThe hard drive on the notebook computer is factory loaded with Windows 95 andready for operation. Supplied with the Windows 95 system is a facility for creating

backup diskettes of the system software. In the event of a disk crash or otherproblem, you can use the Windows 95 Startup diskette to boot the unit and

perform troubleshooting.

6 .3 Require d Too ls and Equipm e nt

All notebook computer corrective maintenance procedures can be performed usingthe following tools: Tweezers

Small flat-blade screwdriver

Small Phillips screwdriver

Hexagonal Screwdriver

Plastic Stick

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c Caution: All boards, options and peripherals contain components thatare sensitive to static electricity. When handling any of these items, pro-tect against static electricity by using wrist or ankle grounding strapsand grounded working mats. When moving or storing items, use the anti-

static bags supplied with the items.

6 .4 Not e book Field-Replac e able Part sand Ass e m blie s

All members of the Extensa 450 Series Notebook Computers contain two majorassemblies including the Cover Display Assembly (upper half of notebook computer)and the System Base Assembly (lower half of the notebook). Each of these twoassemblies contain FRUs as described in the following subparagraphs.

6 .4 .1 Cove r-Display Ass em blyAs shown in Figure 6-1, the Cover-Display Assembly contains the LCD screen,Power Inverter Board, and Converter Board.,The DSSTN models also include a SlidePot Board (not used with the TFT models).

The Field Replaceable Units (FRUs) within the Cover Display Assembly are providedin Table 6-1.

nNote: FRU level part numbers are not available at time of publication of this man-ual. For required part numbers, reference the Field Service Bulletins (FSBs) for theExtensa 450 Series or contact Texas Instruments by dialing 1-800-TI TEXAS.

Bezel (Removedfor Clarity)

Power InverterBoard

Slide Pot/ConverterBoard

LCD Cover

Figure 6 -1 Cove r Display Ass em bly FRUs

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Table 6-1 Cover Display Assembly, Field Replaceable Units (FRUs)

FRU Des cript ion Re fere nc e

Paragraph

No .

FRU De sc ript ion Refe rence

Paragraph

No .

Inverter Board, DSSTN

10.4"

6.5.9 LCD Cover, DSSTN

10.4", 450

6.5.9

Inverter Board, TFT 9.4" 6.5.9 LCD Cover, TFT 9.4",

450T

6.5.9

Display Assembly, 10.4"

DSSTN 450

6.5.8 Bezel, DSSTN 10.4",

450

6.5.9

Display Assembly, 9.4"

TFT 450T

6.5.8 Bezel, DSSTN 10.4",

455

6.5.9

Slide Pot Board, DSSTN

10.4"

6.5.9 Bezel, TFT 9.4", 450T 6.5.9

Converter Board, TFT

9.4"

6.5.9 Bezel, TFT 9.4", 455T 6.5.9

6 .4 .2 Syste m Base Ass em blyAs shown in Figure 6-2, the System Base Assembly houses a variety offield-replaceable subassemblies and components. The FRUs and paragraph

references for removal/replacement procedures are listed in Table 6-2. Table 6-3contains a listing of Customer (non-technical user) replaceable units (CRUs) andassociated TI Part Numbers.

n Note: FRU level part numbers are not available at time of publication of this man-ual. For required part numbers, reference the Field Service Bulletins (FSBs) for theExtensa 450 Series or contact Texas Instruments by dialing 1-800-TI TEXAS.

Figure 6-2 Base Ass em bly FRUs

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Table 6 -2 Base Ass em bly, Field Replac eable Unit s (FRUs)

FRU De sc ript ion Refe rence

Paragraph

No.

FRU De sc ript ion Refere nc e

Paragraph

No

Main Board Assembly 6.5.16 Touch Pad Assembly 6.5.11

Memory Board Assembly 6.5.15 Heat Sink Assembly 6.5.6

Serial IR Board Assembly 6.5.12 HDD Cable 6.5.4

Primary Battery Board

Assembly

6.5.13 FDD Cable 6.5.4

Secondary Battery

Board Assembly

6.5.17 HDD Cover Assembly 6.5.4

Power Supply Board

Assembly

6.5.14 HDD Holder Assembly 6.5.4

Floppy Drive Assembly 6.5.3 Lower Case Assembly Ref

Hard Disk Drive, 340

Million Byte, 12.5mm

6.5.4 Upper Case Assembly 6.5.10

Keyboard Assembly 6.5.5

Table 6-3 Not eboo k CRUs (Cus to m er Replace able Unit s)

CRU De sc ript ion TI Part No. Re fere nc e

Paragraph

No .

Internal Battery Pack, Ni-MH 9803928-0001 6.5.1

Battery Pack, Li-ION (Option) 9803929-0001 6.5.3

4MB RAM Module 9803932-0001 6.5.7

8MB RAM Module 9803950-0001 6.5.7

16B RAM Module 9803933-0001 6.5.7

External Battery Charger 9803934-0001 Ref.

Port Expander (TravelBud) 9803935-0001 Sec. 2

Full Function Port Replicator 9803936-0001 Ref.

PCMCIA Option 9803930-0001 Sec. 2

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3 . Turn the computer over so that the Hard Drive panel is on your right side (SeeFigure 6-3). Press down on the circular bump with your thumb to release thehard drive cover; remove the cover and lay aside for later reinstallation.

4 . Using finger pressure, slide the metal cover downwards toward the edge of thenotebook; then lift upwards to remove the metal cover.

5 . Insert a small blade straight slot screwdriver into the recess in the plastics andgently lift the frontmost edge of the drive out of the bay.

6 . Lay the hard drive on its back.Then using a small straight slot screw driver, gentlypry on each end of the connector on the Disk Drive and rock it back andforth until the connector is removed from the drive assembly.

7. Replacement is essentially the reverse of steps 1 through 6.

6 .5 .5 Rem oving/ Replacing the Keyboard Ass em blyThe procedure for removing and replacing the keyboard assembly is as follows:

1 . Turn off the computer and disconnect the ac power adapter (if it is attached).

2 . The top edge of the keyboard is held in place by plastic tabs beneath the CTRLand Right Arrow Keys. Pull the tabs toward the front of the notebook (tabssnap into an 1/8 inch recess in the plastics).

3 . Using a small straight-blade screwdriver, lift the front edge of the keyboardupwards.

4 . Lift the front edge of the keyboard slightly and gently pull the keyboard towardsthe front of the notebook exposing two cables that connect the keyboard to

the main board.

5 . Release the two ZIF (zero insertion force ) connectors using a plastic stick or othernonmetallic object and remove the cables from the main board connectors

6. Remove the keyboard assembly from the notebook.

7 . When installing the replacement keyboard, essentially reverse the above

procedures.

6 .5 .6 Rem oving/ Replacing the Heat S inkTo remove and replace the heat sink, perform the following procedure:

1 . Remove the keyboard assembly as described in paragraph 6.5.5.

2 . Remove the two Phillips-head screws that secure the heatsink to the main board(note that one of the screws is located near the HDD connector).

3 . Lift upwards on the heatsink and remove it from the base.

4 . Replacement is the reverse of steps 1 through 3 above.

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6 .5 .7 Rem oving/ Replacing Dual Inl ine Mem oryModules (DIMMS)

To remove and replace the expansion memory, use the following procedure:

1 . Loosen the keyboard assembly (but do not disconnect keyboard cables) asdescribed in steps 1 through 5 of Paragraph 6.5.5).

2 . Remove the Heatsink as described in Paragraph 6.5.6.

3 . Using the back edge of the keyboard as a hinge, lift the front edge of the keyboardup and lay it against the LCD assembly.

4 . Push the two metal springs away from the board edge and remove the DIMMSboard.

5 . When installing a DIMMS board, insert the edge of the board into the rear of itsconnector using a slight rocking motion at an angle to the surface of the

board.

6. Once the DIMM is fully inserted in the connector, push downwards on both sidesof the board to snap it in place.

Figure 6 -4 Rem oving/ Replacing Expans ion RAM

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6 .5 .8 Rem ovin g and Replac ing th e Cove r-DisplayAssembly

To remove the cover-display assembly, perform the following procedure:

1 . Remove the keyboard and heatsink as described in paragraphs 6.5.5 and 6.5.6respectively.

2 . Remove the cable cover below the display by lifting upwards on the front edge ofthe cover.

4 . Unplug the video cable that mates with the Main Board.

5 . With the main video cable out of the way, two smaller cables are visible. Unplugthe rightmost cable.

6 . Using a plastic stick, slide the right and left hinge covers away from the base

assembly.

7. Lay the display completely back and remove the four screws that secure the

display hinges to the base case assembly.8. Ensure that the display cables are free from the top case assembly and remove

the display assembly.

9. Reinstallation of the Display Assembly is the reverse of steps 1 through 8 above.

6 .5 .9 Rem oving and Replacin g th e Inve rte r BoardTo remove and replace the Inverter Board assembly, perform the followingprocedure:

c Caution: If the notebook is powered up with the LCD bezel removed,you can be exposed to high voltages which could result in shock andequipment damage. Ensure that the batteries and AC adapter are re-moved from the notebook when working on the LCD/Display assembly.

1 . Use a narrow piece of plastic or pointed tweezers to apply light pressure to oneedge of the lower screw covers. The lower screw covers will bow outwardsand can be removed.

2 . Remove the rubber upper screw covers using a pair of tweezers.

3 . Remove the six screws that secure the bezel to the display assembly (a smallPhillips-head screwdriver is recommended for removing the two screws at thetop of the bezel).

4 . Pull on the inside edges of the bezel; remove bezel and lay aside for laterreinstallation.

5 . Peel back the EMI shield along the right side of the display to expose the InverterBoard.

6. Disconnect the connectors at the top and bottom of the Inverter Board.

7. Use the small Phillips-head screwdriver to remove the two screws holding theInverter Board; remove the Inverter Board Assembly.

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8 . Reinstallation of the Inverter Board is the reverse of steps 1 through 7 above.

6 . 5 . 1 0 Opening/ Replacing the Top Case Ass em blyTo remove/replace the Top Case Assembly, perform the following procedure:

1 . Remove the Keyboard Assembly and Heat Sink Assembly as described inParagraphs 5.5.5 and 5.5.6.

2 . Remove the four screws that secure the Top Case Assembly to the base. Note thatthe screw at the rear of the opening is shorter than the remaining threescrews.

3 . Using a plastic stick, unlock the ZIF connector located near the glide pad andremove the cable from the connector.

4 . Remove the cable cover below the display by lifting upwards on the front edge ofthe cover.

5. Turn the notebook over and remove the six Phillips-head screws from the bottomof the notebook.

6. Rotate the notebook so that the rear of the unit is facing you; remove the reardoor assembly by bowing it outwards.

7. Several recesses are located just above the two rear connectors. Use a smallflat-blade screwdriver to disengage the snaps associated with the right andleft recesses.

8. Lift and push the Display Assembly forward to disengage it from the BaseAssembly.

9 . Replacement of the Top Case Assembly is the reverse of steps 1 through 8 above.

6 . 5 . 1 1 Rem oving/ Replacing the Touch PadAssembly

To remove and replace the Touch Pad Assembly, perform the following procedure:

1 . Remove the Top Case Assembly as described in the previous paragraph.

2 . Turn the Top Case Assembly over and remove the four screws that secure a metalshield to the plastics.

3 . Lift the plastic frame that rests on top of the touch pad.

4 . Unplug the flex cable from the connector on the touch pad. Note that the boardconnector is a LIF (Low insertion force) type; the cable is held in place byfriction.

5 . Slide the board assembly to the right and remove from the unit.

6 . Replacement of the Touch Pad Board Assembly is essentially the reverse of Steps1 through 5 above.

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Figure 6-5 Touchpad Removal/ Replacem ent

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6 . 5 . 1 2 Rem oving/ Replacing the SIR BoardTo remove and replace the SIR Board, perform the following procedure:

1 . Remove the Top Case Assembly as described in paragraph 6.5.10.

2 . Unplug the SIR Board cable connector from the Main Board (small leftmost cableconnector at J8 as shown in Figure 6-6).

3 . Remove the SIR Board from the notebook.

4 Replacement is essentially the reverse of steps 1 through 3 above.

Figure 6 -6 SIR Board Rem oval/ Replace m en t

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6 . 5 . 1 3 Rem oving/ Replacing the Primary Batt eryBoard

To remove and replace the Primary Battery Board, perform the following procedure:

1 . Remove the Top Case Assembly as described in paragraph 6.5.10.

2 . Disconnect the cable located next to the HDD Connector.

3 . Remove the two screws

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