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Maintenance Manual
Extensa 450 Series Notebook Computers
9805725-0001
November 1995
tm
Copyright (©) 1995 Texas Instruments Incorporated All Rights Reserved -- Printed in U.S.A. Extensa 450 Series Notebook Computers Maintenance Manual TI Part No. 9805725-0001 Original Issue: November 1995
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 in their business; but tools -- including TI products -- cannot replace sound judgement nor make the manager's business decisions. Consequently, TI cannot warrant that its products are suitable for any specific customer application. The manager must rely on judgement of what is best for his or her business. Address all correspondence regarding orders to: Texas Instruments Incorporated P.O. Box 6102, M/S 3255 Temple, Texas 76503
Extensa 450, TravelMate, 5000, 4000M, 4000E, 4000 and BatteryPro are trademarks of Texas Instruments Incorporated. The icons in the Windows Notebook and Startup 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 MicroComputer Products Inc. IBM, OS/2, AT PS/2, and VGA are trademarks of International Business Machines Corporation. Intel, and IntelDX4 are trademarks of Intel Corporation Lotus is a trademark of Lotus Development Corporation MNP 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.
Contents
Preface Section 1 General Description
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
Section 2
Installation
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 2.4 Installing the Battery Pack(s ) . . . . . . . . . . . . . . . . . . . . . . . 2-5 2.5 Installing External Devices . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 Contents iii
2.5.1 Installing an External Keyboard/Mouse . . . . . . . . . . . 2-6 2.5.2 Installing External Parallel Printer . . . . . . . . . . . . . . . 2-8 2.5.3 Installing External Serial Port Device . . . . . . . . . . . . . 2-8 2.5.4 Installing External VGA Monitor . . . . . . . . . . . . . . . . . 2-10 2.5.5 Installing SIR Devices . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.6 Installing the AC Power Adapter . . . . . . . . . . . . . . . . . . . . 2-11
2.7 Initial System Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2.8 Configuring the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2.9 Making Backups of System Software. . . . . . . . . . . . . . . . . . 2-13 2.10 Loading Application Software . . . . . . . . . . . . . . . . . . . . . . 2-13
Section 3 Operating Instructions
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 Notebook Controls and Indicators . . . . . . . . . . . . . . . . . . . . 3-1 3.2.1 LCD Brightness Control . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2.2 Button 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
Section 4
Theory of Operation
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.2 Notebook 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
iv Contents
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
Section 5 Troubleshooting Procedures
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 5.3.3 Fault Isolation Using Selftest . . . . . . . . . . . . . . . . . . . 5-5 5.3.4 PCMCIA Modem Problems. . . . . . . . . . . . . . . . . . . . . . 5-5 5.3.5 Fault Isolation Using Diagnostics . . . . . . . . . . . . . . . . 5-6
Section 6 Field Service
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 6.3 Required Tools and Equipment . . . . . . . . . . . . . . . . . . . . . 6-3 6.4 Notebook Field-Replaceable Parts and Assemblies. . . . . . . . 6-3 6.4.1 Cover-Display Assembly . . . . . . . . . . . . . . . . . . . . . . 6-3 6.4.2 System Base Assembly . . . . . . . . . . . . . . . . . . . . . . . 6-4 6.5 FRU Removal and Replacement Procedures . . . . . . . . . . . . 6-6 6.5.1 Removing/Replacing the Notebook Battery Pack . . . . . 6-6 6.5.2 Removing/Replacing PCMCIA Options . . . . . . . . . . . . 6-7 6.5.3 Removing/Replacing the Floppy Drive . . . . . . . . . . . . 6-7 6.5.4 Removing/Replacing the Hard Drive . . . . . . . . . . . . . 6-7 6.5.5 Removing/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 Assembly 6-10
Contents v
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
Appendix A
Self-Test Error Messages
A.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Appendix B
Connector Pinouts
B.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Appendix C
PC-Doctor Diagnostics
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
Preface
This manual provides installation, operation and servicing data for the Extensatm 450 Series Notebook Computers.
Intended Audience
This manual is primarily intended for use by qualified service technicians but contains information useful to non-technical users.
Contents
This manual contains six sections and multiple reference appendices including:
· · · · · · · · ·
Section 1: General Description -- Introduces the main features of the notebook; provides a list of physical and electrical specifications. Section 2: Installation -- Describes how to unpack, install options and cable up the notebook computer in a desktop environment. Section 3: Operating Instructions -- Describes the notebook operating controls and indicators and modes of operation. Section 4: Theory of Operation -- Describes detailed theory of operation for Extensa series notebooks. Section 5: Troubleshooting -- Provides troubleshooting procedures for the Extensa 450 series notebooks. Section 6: Field Service -- Provides corrective maintenance procedures for the notebook computer. Appendix A: Self Test Error Messages Appendix B: Connector Pinouts Appendix C: PC-Doctor Reference Data
n
Note: Additional appendices will be added at a future date to document new members of the Extensa product family.
Other Manuals About the System
The following documents provide additional information related to the Extensa 450 series:
Preface vii
· · ·
Extensa 450 Series Notebook Computer User's Reference Manual, Part No. 9803942-0001; contains reference information regarding the Extensa 450 series software including the TI custom utilities. Windows 95 Help (online) PC-Doctor Help and Technical Reference (online)
Ordering Parts and Supplies
To order a copy of any TI publication or to order option kits, spare parts or supplies for your system, contact your TI Reseller or: Telephone Toll-free: 1-800-TI TEXAS
viii Preface
Section 1 General Description
1.1
Introduction
This manual contains field and factory level servicing information for the Texas Instruments Extensa tm 450 Series of Notebook Computers (Figure 1-1). This section provides a general overview and specifications for the Extensa 450 Series Notebook Computers.
Figure1-1 Extensa 450 Series Notebook Computer
General Description 1-1
1.2
Product Models
Table 1-1 summarizes the features of the product models initially available in the Extensa 450 product line. Basically, the product models offer a choice of either 10.4" Dual Scan Color or 9.4" Active Matrix Color LCDs and a choice of either the basic Windows 95 operating system or Windows 95 plus applications.
Table 1-1 Extensa 450 Series Notebook Computers
Model 450
10.4" DS LCD Windows 95
Model 450T
9.4" Active Matrix Color Windows 95
Model 455
10.4" DS LCD Windows 95 Plus Microsoft Works, Quicken SE, Lotus Organizer, and Microsoft Entertainment Pack
Model 455T
9.4" Active Matrix Color Windows 95 Plus Microsoft Works, Quicken SE, Lotus Organizer, and Microsoft Entertainment Pack
1.3
International Product Versions
The Extensa 450 Series Notebooks are available in one of 15 domestic and international configurations as listed in Table 1-2.
Table 1-2. Notebook Domestic/International Configurations
Configuration
Domestic UK German French Spanish Swiss/German Italian Portuguese Western European
P/N Suffix
-0001 -0002 -0003 -0004 -0005 -0006 -0007 -0008 -0009
Configuration
Swedish Swiss/French Danish Norwegian Finish Belgium Austrian Latin American
P/N Suffix
-0010 -0011 -0012 -0013 -0014 -0015 -0016 -0018
1-2
General Description
1.4
Product Overview
All members of the Extensa 450 Series are high performance notebooks powered by the 75MHz IntelDX4 processor and Windows 95 tm Operating System software. As a standard feature, all members of the Extensa 450 family also contain the following features:
· · · · · · · · · · · · ·
4MB of RAM memory (user-expandable to 32MB) 128 bytes of battery-backed up CMOS RAM 512 KB of video RAM 340 Million Byte Hard Drive (user replaceable) Support for one PCMCIA Type I or II option (Type III if floppy drive is removed with option) Ergonomic keyboard with palm rest (2.7 mm travel); built-in touchpad pointing device Most standard external device interfaces including serial, parallel, PS/2, external VGA, and serial infrared wireless port Removable 3.5", 1.44 MB Floppy Drive (second Lithium Ion battery or a type III PCMCIA device can be installed in its place with option) Choice of LCD displays (10.4" Dual Scan Color or 9.4" Active Matrix Color LCD). AC Adapter with autosensing (100 VAC to 240 VAC, 50 to 60 Hz); 34 Watts of DC output power 10.8 Volt, 2400 mAH capacity, Nickel-Metal Hydride (NiMH) primary battery pack Provisions for secondary 10.8V, 1460 mAH capacity, Lithium-Ion Battery Pack (with removal of Floppy Drive) Power management features for longer portable operation away from AC power.
General Description 1-3
Figure 1-2 Extensa 450 Series Features
1-4
General Description
1.4.1
· · · · · ·
External Ports
As shown in Figure 1-3, the notebook computer contains the following external ports: Serial Infrared (SIR) Port for wireless connection with a similarly equipped printer 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 Notebook External Ports
General Description 1-5
1.4.2
Touchpad Pointing Device
All members of the Extensa family feature a built-in Touchpad pointing device located near the center of the keyboard's palmrest. With light presure, the cursor can quickly be positioned to the desired point; a quick double tap on the Touchpad and you have selected an object. Two select buttons (switches) are located along the front edge of the notebook .
Figure1-4 Extensa Touchpad
1.4.3
Keyboard
The Extensa Series Keyboard is an 83/84-key, IBM enhanced-type keyboard with the standard character and function keys plus 12 programmable function keys (F1 through F12). Using the Special Function (Fn) key which assigns multiple functions to keys, the keyboard can emulate the IBM 101/102 keyboards using 83 keys (84 on international models). The keyboard has a 2.77 mm stroke and features a special keyboard interface chip that can detect multiple levels of key input (good simulation of N-key rollover for up to 10 keys). Some of the major features of the keyboard include:
· · ·
1-6
2.77-mm Key movement Integrated numeric keypad "Inverted T" Cursor Control Key layout
General Description
The notebook keyboard is available in the following versions:
· ·
U.S. English - This version (also known as the domestic version) has 81 keys and is generally used in the United States and Canada. U.K. English - This version (also known as the international version) has 82 keys and is generally used in England, Germany, and other European countries with the appropriate keycap changes.
n
Note: The Extensa Series Notebook Computer User's Reference Manual contains descriptions of keyboard special function keys. A six-pin Mini-DIN connector can attach to either an external PS/2 keyboard (or 101 Keyboard via an adapter), PS/2 Mouse, or the optional PS/2 Numeric Keypad.
-I?
.
.
.!
F4
.#
.$
.%
.&
.'
.
F11 Pause
F12 Break
NumLk ScrLk
Prt Sc SysRq
Insert
Delete
1
@ 2
3
4 E R
5
^ 6
6
&
7
%
&
&
9
'
1
O
$
Q
Caps Lock
Shift
9
A Z S
:
;
G
H
U
"
P L
!
{
[
}
]
#
D C
F V
J
K
M
Enter
B
N
Shift Alt
Home End
2 C 7p 2 C,n
Fn
Ctrl
Alt
Figure1-5 Extensa Keyboard
1.4.3.1
Controls and Indicators
As shown in Figure 1-6, Extensa Series Notebook Computers contain a set of three buttons (switches) and five LED displays just above the keyboard including:
· · ·
Power, Setup, and Standby/Suspend Buttons (Switches) Caps Lock indicator. This LED indicates that the keyboard is locked in the uppercase mode. To switch to the lowercase mode, press the Caps Lock key. Num Lock indicator. This LED lights when you press the NumLk key to toggle on the numeric keypad lock function. When the LED is On, the embedded numeric keyboard keys generate AT-keypad characters and functions when pressed in conjunction with the Shift key. When the indicator is Off, pressing
General Description 1-7
the Fn key with the appropriate keys provides cursor movement, paging and other functions in the normal mode.
· · ·
Scroll Lock indicator. This LED lights to indicate that the keyboard is locked in the scroll mode. Hard Disk Drive Activity Indicator. Indicates when notebook is accessing the hard drive. Standby Indicator. Lights when Notebook is in Standby mode.
Figure1-6 Extensa Series Controls and Indicators
1.4.4
Standard Power Features
Notebook power for the Extensa 450 Series Notebook Computers is provided by an AC 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 bay when the Floppy Drive is removed from the Notebook.
1-8
General Description
All members of the Extensa 450 family feature TI's patented power management subsystem (hardware and software) that provides longer portable operation and protection of files during low battery conditions.
1.4.5
Wireless Connection With Serial Infrared Port
The Extensa series notebooks are equipped with a Serial Infrared (IR) port that offers wireless communication with a variety of IRDA-compliant devices made by other manufacturers.
n
Note: Prior to communicating with an external device equipped with a serial infrared interface, the appropriate third-party drivers must be installed on your notebook.
1.4.6
Preloaded Software
All members of the Extensa 450 Notebook family are preloaded with the Windows 95 Operating System. In addition, Extensa Models 455 and 455T come standard with the following application packages installed:
· · · ·
Microsoft Works Quicken SE Lotus Organizer Microsoft Entertainment Pack No. 4
1.4.7
· · · · ·
Notebook Expansion Capabilities
Expansion 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 a Type III PCMCIA device with option. A Cable Connect PS/2 Numeric Keypad option, P/N 2581381-0001, can be attached to either of the two external PS/2 Ports. A parallel device can be attached to the notebook's external 25-pin parallel port (EPP/ECP compatible). With the port adapter installed (supplied with the notebook), the notebook's expansion 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
General Description 1-9
·
Third Party External PS/2 keyboard (or external mouse)
1.5
Standard Test Features
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 automatically verifies the operational state of the primary circuits and a powerful suite of diagnostic tests are available to further test selected parts of the system.
1.6
Notebook Assemblies and Subassemblies
The Extensa Series Notebooks are modular in design and can be disassembled for maintenance purposes using a standard set of flat-bladed, Phillips-head and hexagonal screwdrivers. The major assemblies that comprise a typical notebook in the Extensa family are shown in Figure 1-7 and briefly described in the following paragraphs.
Figure 1-7 Notebook Assemblies
1-10
General Description
1.6.1
Cover-Display Assembly
The Cover-Display Assembly contains the LCD screen and associated high voltage power supply and video circuitry. The Cover-Display Assembly contains three field-replaceable components including:
· · ·
LCD Assembly Inverter Board Slide Pot/Converter Board
The Cover-Display Assembly attaches to the System Base Assembly through four top mounted screws and six mounting screws on the bottom of the computer.
1.6.2
· · · · · · · · · · · · ·
System Base Assembly
As shown in Figure 1-7, the majority of the notebook's 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
1.7
Extensa 450 Series Notebook Specifications
Specifications for the Extensa 450 Series Notebooks are provided in Table 1-6.
Table 1-6
Extensa 450 Notebook Features
Specifications
Memory:
Models 450/450T
Models 455/455T
Standard: Maximum
Display LCD Type:
4MB 32MB
4MB 32MB
10.4" Dual Scan Color Yes 512 KB VLBUS with Graphics Accelerator
9.4" Active Matrix Color Yes 512 KB VLBUS with Graphics Accelerator
Simultaneous LCD/Ext. VGA Video RAM Size: Video Bus
Keyboard/Pointing Device,
Ergonomic Keyboard Built-In Touchpad
Storage
Yes Yes
Yes Yes
Floppy Drive: Hard Drive:
Interfaces
3.5", 1.44MB 340 Million Byte
3.5", 1.44MB 340 Million Byte
Serial (RS232) Port Parallel Port (EPP/ECP), Yes External VGA Port External PS2 Ports Serial Infrared Port
PCMCIA Support
Yes (Port Adapter) Yes Yes (Port Adapter) Yes (2nd PS/2 Port on Adapter) Yes Type I/II (III Optional)
Yes (Port Adapter)
Yes (Port Adapter) Yes (2nd PS/2 Port on Adapter) Yes Type I/II (III Optional)
1-12
General Description
Specifications
Software
Models 450/450T
Windows 95
Models 455/455T
Windows 95,plus applications
Physical Characteristics
Weight: Dimensions: * Wight specifications do not include Floppy Drive, AC Adapter or 2nd Battery
Approx. 5.0 Pounds (2.27kg) * 11.7" (L) X 1.7" (H) X 8.2" (W)
Approx. 5.0 Pounds (2.27kg) 11.7" (L) X 1.7" (H) X 8.2" (W)
1.8
· · · · ·
Agency Approvals
All Extensa 450 Series products meet the following standards: Underwriter's 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
2 Installation
2.1
Introduction
This section contains unpacking and preparation for use instructions for the Extensa 450 Series Notebook Computers.
2.2
Unpacking Instructions
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.
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Note: Save the shipping containers and packaging for later reuse.
2.3
Installing Notebook Options
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
Installing Dual Inline Memory Module(s)
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Note: If not installing RAM Expansion option at this time, skip to the next paragraph.
Caution: The Dual Inline Memory Module contains components that are sensitive to static electricity. When handling the module and the internal parts of the computer, protect against static electricity by using wrist or ankle grounding straps and grounded working mats. When moving or storing items, use the anti-static bags supplied with the items.
Installation 2-1
1. 2. 3. 4 5 6. 7.
Ensure that the notebook is powered off and that the AC Adapter and internal battery pack(s) is (are) removed from the notebook. Remove the DIMM module(s) from its shipping container. Release the Keyboard by pulling the keyboard release tabs forward (tabs are located underneath the Ctrl and right arrow keys). Disengage the Keyboard using a straight blade screwdrive and gently lifting up along the front edge of the keyboard. Using the back edge of the keyboard as a hinge, lift the front edge of the keyboard up and lay it against the display. Remove the two Phillips head screws holding heatsink to the Main Board and remove the heatsink by lifting it upwards and out of the unit. 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. Push downwards on each side of the DIMMs module until it snaps in place. Replace the heatsink, keyboard assembly and any other components removed in step 1.
8.
This completes the expansion memory module installation procedure.
Figure 2-1
Installing Additional Memory
2-2 Installation
2.3.2
Installing PCMCIA Options
The 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 removed from the notebook and the optional PCMCIA Module is installed.. 1. 2. 3. Review the installation instructions supplied with the PCMCIA option card(s). Open the Type I/II PCMCIA compartment cover on the left side of the notebook. To insert a PCMCIA card, align the card with the socket and slide the card into the socket until it locks into place. To install a Type III option, you must remove the Floppy Drive from the right side of the notebookand install the PCMCIA Option Assembly.. To eject a PCMCIA card, first ensure that the notebook is not accessing the memory card or device. Under Windows 95, go to the Control Panel, PC Card and direct the card to stop before removing card.
4.
Type III PCMCIA If Floppy Drive Removed and PCMCIA Option installed
Type 1 or Type II PCMCIA Option
Figure 2-2
Installing PCMCIA Options
Installation 2-3
2.3.3
Installing the Port Adapter
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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 2 3 Remove the -port adapter and any accessories from its shipping carton . Disconnect the AC Adapter from the notebook (if attached). Open the rear connector door on the notebook and attach the Port Adapter to the notebook as shown in Figure 2-3.
Figure 2-3
Installing the Port Adapter
2-4 Installation
2.3.4
Installing the Optional Numeric Keypad
An optional numeric keyboard can be attached to the notebook via the notebook's PS/2 connector as shown in Figure 2-4.
Figure 2-4
Installing the Numeric Keypad option
2.4
Installing the Battery Pack(s )
The standard configuration of the Extensa Notebook is equipped with a single battery pack that is inserted from the front right side of the computer. However, if you 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. 2. Power off the notebook, being sure to save your data first. Locate the battery door (right side of notebook near the front). Press the battery door inwards and slide the door toward the front of the notebook; remove the battery door. Insert a new or recharged battery pack into the battery compartment bay. Make sure that the contacts are facing up and to the rear of the compartment. Check the label (facing up when inserted) indicating the positive and negative poles of the battery.
3.
Installation 2-5
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Caution: There is danger of explosion if the battery is incorrectly replaced. Replace the battery only with the same or an equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions.
2.5
Installing External Devices
Most external devices connect to the Notebook via the connectors on the rear of the notebook and on the rear of the Port Adapter supplied with the notebook (see Figure 2-5 for port assignments).
Figure 2-5
Extensa Port Assignments
2.5.1
Installing an External Keyboard/Mouse
As shown in Figure 2-6, the notebook has provisions for two external PS/2 compatible 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.
2-6 Installation
PS/2 Ports
Figure 2-6
PS/2 Port Assignments/Pinouts
To install an external keyboard or external PS/2 mouse on the notebook, use the following procedure: 1. 2. 3. 4. Ensure that the notebook is powered off. Locate the external PS/2 ports at the rear of the notebook (see Figure 2-6). Attach the PS/2 cable from your mouse and/or keyboard cable to the PS/2 port(s). Power on any other peripheral devices you may have connected to the notebook, and then power up the notebook.
Installation 2-7
2.5.2
Installing External Parallel Printer
The Notebook is equipped with a bi-directional, ECC/EPP compatible, 25-pin parallel printer port. The connector pinouts and connector location are shown in Figure 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 the manual which accompanied your printer for instructions on configuring your operating environment
Figure 2-7
Parallel Port Location/Pinouts
2.5.3
· · ·
Installing External Serial Port Device
The notebook contains an RS-232 serial port with a male DB-9 connector as shown in 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 printer are turned off.
2-8 Installation
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Caution: Never connect a parallel device to a serial port or a serial device to a parallel port or video port; this may cause damage to the Notebook and/or peripheral device. If you are uncertain of what type connector the external device has, refer to the technical manual for the external device.
Figure 2-8
Serial Port Location/Pinouts
Installation 2-9
2.5.4
Installing External VGA Monitor
The notebook is capable of driving both its internal LCD display and an external VGA monitor (LCD only, simultaneous, or VGA only). The external monitor connector pinouts and connector locations are shown in Figure 2-9. To install an external monitor with the notebook, use the following steps: 1. 2. 3. Ensure that both the notebook and the external monitor are turned off. Locate the 15-pin female VGA port on the Port Adapter. Attach the appropriate end of the monitor cable to the VGA port on your notebook. If the monitor cable connectors have retaining screws, tighten them down. If necessary, connect the monitor power cable to the monitor, and plug the monitor power cable into an electrical outlet. Power on the monitor, as well as any other peripheral devices connected to the notebook; then power up the notebook
4. 5.
2.5.5
Installing SIR Devices
The Serial Infrared (IR) port offers wireless communication with a variety of IRDA-compliant devices made by other manufacturers. Ensure that the third-party manufacturer supplies you with the appropriate IR drivers before attempting connection.
2-10 Installation
Figure 2-9
External Monitor Port Pinouts
2.6
Installing the AC Power Adapter
Use the following procedures to connect the AC Adapter to the system:
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Caution: Use only the AC Adapter supplied with the computer; other adapters can damage the unit.
1.
Remove the AC adapter from the packaging. Connect the round coaxial connector supplied with the notebook to the power receptacle on the rear of the notebook as shown in Figure 2-10. Connect the female side of the AC Power cord to the AC Adapter and connect the male end to a grounded AC outlet.
2.
Installation 2-11
Figure 2-10
AC Adapter Installation
2.7
Initial System Checkout
After you've installed all internal options and external cabling, you're ready for system checkout and software configuration.
To check out the system, set the power switch on the notebook to the On (I) position which initiates the notebook self test. During self test execution, the computer checks the operation of all key hardware including memory and CPU (and displays copyright and version number data during test execution). Upon successful conclusion of self test, the computer automatically loads its operating system and Windows environment. If self test fails to complete and an error message is displayed, try powering down the computer for a couple of minutes and turning power back on to repeat self test. If the error message persists, see Section 6 for troubleshooting information.
2.8
Configuring the System
The first time you power up the notebook, it automatically runs the Setup Program which prompts you for country name and printer type. You exit Windows and the notebook begins unzipping files and preparing the software for use. Then it gives you the option of keeping or removing the video.
2-12 Installation
2.9
Making Backups of System Software
The Notebook is preloaded with Windows 95 operating system software. Prior to extended use of the notebook, create a backup set of system software using the Backup 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 you've just created.
2.10
Loading Application Software
For assistance in loading Application Software, refer to Chapter 5 in the Extensa Series Notebook Computer User's Reference Manual.
Installation 2-13
3 Operating Instructions
3.1
Introduction
The first two subsections describe the Extensa 450 Series Notebook operating controls and indicators. The remainder of this section contains a summary of computer operations related to notebook maintenance including how to restore system software.
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Note: For additional operating instructions, see Extensa 450 Series Notebook Computer Users Guide, TI Part No.9803942-0001.
3.2
· · · · ·
Notebook Controls and Indicators
The Extensa Series Notebooks are equipped with the following controls and indicators: 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.
Operating Instructions 3-1
Figure 3-1 Extensa Series Controls and Indicators
3.2.1
LCD Contrast Control
The TFT version of the notebook contains no operating controls or indicators. The Dual Scan version of the display contains a contrast switch on the lower right side as shown in Figure 3-1.
3.2.2
·
Button Switches
The notebook contains two button switches above the keyboard including: Power On/Off Switch- Alternate action, button type switch that controls power to the unit.Pressing the Power button causes power to be applied to the notebook and power up self test to be run. The PWR LED (left rear corner of notebook) glows green and the computer then loads Windows 95. When the Power button is pressed again, the Notebook powers down and all data in RAM memory 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 (if previously On) or On if previously in Standby Mode.
·
3-2 Operating Instructions
3.2.3
Cover Release Latch
The Notebook contains one Cover Release latch . To open the notebook, slide the Release Mechanism to the right and lift up on the front edge of the notebook cover.
3.2.4
Touch Pad Controls
The Extensa 450 Series Notebook Computers are equipped with a built-in mouse device called "the Touchpad" physically located at the bottom of the keyboard (see Figure 3-1). The cursor is positioned by touching and draging your finger in the direction you want the cursor to go. The select functions are performed either by tapping the touch 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 of the 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
Keyboard Mode LEDs
The Notebook contains three "keyboard mode" indicators just above the keyboard on the left side (notebook cover open). These LEDs include:
· ·
CAP (Caps Lock) Indicator- this LED indicates that the keyboard is locked in the Uppercase mode. To switch to the Lowercase mode, press the Caps Lock key on the keyboard. NUM (Num Lock) Indicator- This LED lights when you press the Fn-F7 (NumLk) keys to toggle on the numeric keypad lock function. When the LED is On, the embedded numeric keyboard keys generate AT-keypad characters and functions when pressed in conjunction with the Fn key.
When the NUM indicator is Off, pressing the Fn key with the appropriate keys provides cursor movement, paging and other functions in the normal mode. When the NUM indicator is On, the embedded numeric keypad becomes a temporary numeric keypad that does not require you to press any other key.
·
SCRL (Scroll Lock) Indicator- This LED lights to indicate that the keyboard is locked in the scroll mode.
3.3
Operating Procedures
Some of the operating features useful for notebook maintenance are provided in the following paragraphs. For additional operating instructions, refer to the Extensa 450 Series Notebook Computer User's Manual, Texas Instruments Part No. 9803942-0001.
3.3.1
Floppy Drive Operating Procedures
To avoid damaging the floppy drive drive, and to protect data, take the following precautions:
Operating Instructions 3-3
· · · · · · · · ·
Never turn off or reset the notebook while the floppy activity indicator is lit. Keep the AC adapter at least 6 inches away from your drive. Insert the floppy into the floppy drive slot with the label side up and the metal-shutter end first. Gently push the floppy into the floppy drive slot until the floppy clicks into place. To remove a floppy, press the eject button until the floppy pops out. Never force open the access shutter on a floppy. Always remove a floppy from the floppy drive before turning off the computer. Never transport the commuter with a floppy in the floppy drive. Doing so can damage the drive head. If a floppy appears to be damaged, try to make a copy of it, and immediately discard it. Keep all floppies when not in use in a disk storage box to protect them from damage or loss.
3.3.2
Installing/Removing PCMCIA Options
PCMCIA cards are inserted and ejected in much the same way as diskettes:
· · ·
Type I or Type II PCMCIA options may be installed in the compartment on the left side of the notebook. Type III Options may be installed on the right side of the notebook with the Floppy Drive removed and the PCMCIA Option installed. To insert a PCMCIA card, align the card with the socket and slide the card into the socket until it locks into place. To install a Type III option, you must remove the Floppy Drive. To eject a PCMCIA card, go to the Windows 95 Control Panel, select PC Card and select the card to stop; then press the release button and remove the PCMCIA option.
3.3.3
· ·
Computer Hot Keys
The Extensa Series recognizes the following hot key sequences: CTRL-ALT-DEL (warm boot) CTRL-ALT-ESC (Enter setup screen); to use, power up notebook and press F8 at "Starting Windows 95" message. Select Command Prompt Only; then press CTRL-ALT-ESC.
3-4 Operating Instructions
3.3.4
·
Responding to Low Battery Conditions
The computer generally will notify you when you are reaching a low battery condition 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 installed on 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 low condition, the notebook enters Suspend mode. When the notebook enters Suspend Mode, 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 is activated. Unit then recovers RAM information from the hard drive and restores unit to previous "On" condition.
3.3.5
Minimizing Power Usage
The following actions can minimize power usage and protect your work during the critical minutes before you shut the system down or replace on the battery packs with a fully charged pack:
· · ·
Press CTRL-STANDBY to shut off the alarm (if its enabled) Save RAM Disk (if using RAM Disk feature) Press Standby/ Suspend button to put the computer in Standby/suspend mode whenever you are not actively using the computer. This will save all your work and remember the application and file you were previously using when you return to the On condition. Power down the system if you do not need the computer
·
3.3.6
Recharging the Battery 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. 2. 3. Install the battery pack in your computer (if not already installed). Connect the AC Adapter as described in Section 2. To fully charge the battery pack, leave it charging in the Notebook for at least another 90 minutes.
3.3.7
Restoring Missing System Files
When 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 accidently erased as indicated by error message, insert the Windows 95 Startup Diskette and reboot the system. This will allow you to boot up and troubleshoot your system.
Operating Instructions 3-5
3.3.8
Rebuilding the System Software
In the event of a hard drive replacement or system board replacement which resulted in loss of system software, you may need to rebuilt the entire system software structure. The following items are required to rebuild the system software:
· ·
Set of backup diskettes of the system software Operational Notebook
Insert the Windows 95 Startup Diskette in the Notebook's floppy drive and power up the system.
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Note:For additional operating procedures, refer to to the Extensa 450 Series Notebook Computer User's Manual, Texas Instruments Part No. 9803942-0001..
3-6 Operating Instructions
4 Theory of Operation
4.1 4.2
· · · · · · · ·
Introduction Notebook Functional Description
This section describes the notebook theory of operation.
Functionally, the notebook computer consists of the following major subsystems: Processor and Memory Subsystem I/O Subsystem Video Subsystem Hard Disk Subsystem Floppy Disk Subsystem PCMCIA Subsystem Serial Infrared Subsystem Power Subsystem
A functional block diagram of the Extensa Notebook is shown in Figure 4-1.
4.2.1
Processor/Memory Subsystems
The Processor function, housed on the Main Board, is implemented with a 75mhz IntelDX4 Processor. The processor operates in conjunction with RAM and ROM Memory on the Memory Board and other control logic on the Main Board to process software instructions (BIOS, Windows 95, and Applications). Primary control for the Processor/Memory subsystem is implemented with the M1429L PC/AT Chipset. Address buffering and real time clock function is implemented with an M1441L. The memory subsystem, implemented on the Memory Board and optional Dual Inline Memory Modules, provides 4MB (expandable to 32 MB) of fast DRAM memory, 128 bytes of CMOS RAM (battery backed up) and 256 KB of Flash ROM for system and video BIOS storage. Tables 4-1 through 4-3 contain the Notebook I/O address map, DMA channel assignments and IRQ interrupt level assignments respectively.
Theory 4-1
Figure 4-1
Notebook Functional Block Diagram
4-2
Theory
Table 4-1
Extensa Series I/O Address Map
Address Range
000-00F 020-021 022-023 040-043 060-06E 070-071 080-08F 0A0-0A1 0C0-0DF 1F0-1F7 178,,17A 1F0-1F7 3F6,,3F7, 278-27F 35F, 36F 378,,37A 3BC-3BE 3C0-3C5 3C6-3C9 3C0-3CF 3D0-3DF 3E0-3E1 3F0-3F7 3F8-3FF Video DAC Parallel Port 3 Special I/O Ports Parallel Port 2 Parallel Port 1 DMA Controller 1
Device
Interrupt Controller-1 M1429 Registers Timer 1 Keyboard Controller 8742 Chip Select Real Time Clock and NMI Mask DMA Page Register Interrupt Controller 2 DMA Controller-2 Hard Disk Select 6377 Registers Hard Disk Select
Enhanced Graphics Display Color Graphics Adapter PCMCIA Controller Floppy Disk Controller Serial Port 1
Theory 4-3
Table 4-2 DMA Channels
Controller
1 1 1 1 2 2 2 2 0 1 2 3 4 5 6 7
Channel
Address
0087 0083 0081 0082 Cascade 008B 0089 008A
Function
Spare Spare Diskette Spare Cascade Spare Spare Spare
Table 4-3 IRQ Interrupt Levels
Priority
1 2 3 4
Interrupt Number
SMI NMI IRQ0 IRQ1 IRQ 2
Interrupt Source
Power management unit Parity Error Detected,,I/O Channel Error Interval Timer,,Counter 0 Output Keyboard Interrupt from controller 2 (cascade) Real Time Clock Cascaded to INT 0AH (IRQ 2) Reserved IRQ 12,PS/2 Mouse
5 6 7 8
IRQ8 IRQ 9 IRQ10 IRQ 11,Reserved 9 IRQ13 IRQ14 IRQ15 Serial Comm Port 2 IRQ4 IRQ5 IRQ6 IRQ7
10 11 12 13 IRQ3 14 15 16 17
INT from Coprocessor Hard Disk Controller Reserved
Serial Comm Port 1 Reserved Diskette Controller Parallel Port
4-4
Theory
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Note: A PCMCIA card can use IRQ 3, 4, 5, 7, 9 and 11 as long as it does not conflict with the interrupt address of any other device.
4.2.2
I/O Subsystem
The I/O subsystem, implemented with an NS87334 VJG Super I/O Controller Chip, provides for such functions as internal Hard Drive control, floppy drive control, serial and parallel ports and support for the Serial Infrared port. The Super I/O Controller includes the following features: .
· · ·
100 percent compatible with ISA, EISA, and Micro-channel architectures Built-in Floppy Disk Controller Software compatible with the DP8473, the 765A and N82077
· · · · · ·
16-byte FIFO (default disabled) Burst and Non-burst modes Perpendicular Recording drive support New high-performance internal digital data separator (no external filter components required) Low-power CMOS with enhanced power-down mode Automatic media-sense support
·
Two UARTS
· · ·
Software compatible with the PC16550A and PC16450 MIDI compatible Infrared support on UART2 (IrDA-compliant)
·
Bidirectional Parallel Port
· · · · ·
Enhanced Paralle Port (EPP) compatible Extended Capabilities Port (ECP) compatible, including level 2 support Bidirectional under either software or hardware control Compatbile with ISA, EISA, and Micro Channel architectures Ability to multiplex FDC signals on parallel port pins for external FDD
Theory 4-5
·
Includes protection circuit against damage caused when printer is powered up, or operated at higher voltages
·
Integral IDE controller
·
Provides a complete IDE interface with DMA control (except for optional buffers)
· ·
Integral address decoder- provides selection of all primary and secondary ISA addresses 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 Subsystem
The video subsystem, implemented on the Main Board and on the LCD Display Unit, displays text, graphics and drives an external VGA port. The video subsystem is implemented with a Cirrus Logic 6245 high performance flat panel/RT VGA controller and supporting logic and video RAM (512KB). The major features of the VGA controller include:
· ·
Highly integrated design (flat panel / CRT VGA controller, RAMDAC, clock synthesizer) Multiple Bus Architecture Integrated Interface
· ·
Local Bus (32-bit CPU Direct and VL) EISA/ISA (PC/AT) 16-bit Bus
· · · · · · ·
4-6 Theory
Advanced frame buffer architecture uses available display memory, maximizing integration and minimizing chip count Integrated programmable linear address feature accelerates GUI performance High performance resulting from zero wait state writes (write buffer) and minimum wait state reads (internal asynchronous FIFO design) Supports panel resolutions up to 1280 x 1024 resolution including 800x600 and 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
4.2.3.1
External VGA Drive Capability
On the Extensa 450, the external VGA port is provided by the port adaptor fixture in the form of a 15-pin, female, D-type connector which can be used to drive an external CRT (standard VGA modes with resolutions of 800 X 600 X 256, or 640 X 480 X 256 ).
4.2.4
Hard Disk Subsystem
The Hard Disk Subsystem, controlled by the IDE interface compatible NS87334 VJG Super I/O Controller on the Main Board, provides disk storage for all system software and user files. Initially, the 450 Series Notebooks are equipped with a 340 Million Byte hard drive. However, the onboard controller can support high capacity drives. During the manufacturing process, Texas Instruments formats the hard disk and then loads all supplied software including Windows 95.
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Caution: Formatting the disk drive erases any data that may be stored on the disk. Therefore do not attempt a format of the hard disk unless the computer self-test and diagnostics confirm that the disk has not been formatted.
A Hard Drive activity LED is located along the front edge of the notebook. This LED lights during hard driver read/write accesses.
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Caution: The notebook should not be moved when the HDD LED is lit to prevent accidental damage to the hard drive.
4.2.5
Floppy Diskette Drive Subsystem
The Floppy Diskette Drive Subsystem consists of a Floppy Controller and the Floppy Diskette Drive. The Floppy Diskette Drive can read/write standard 3.5-inch minidiskettes.
4.2.6
PCMCIA Subsystem
The notebook is equipped with an on-board PCMCIA host adapter (CL-PD6722 PCMCIA 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 the following features:
·
Single-chip PCMCIA host adapters
Theory 4-7
· · · · · · · · · · · · · · · ·
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 Subsystem
The 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
Power Management
The notebook is equipped with a power management function that minimizes battery usage for prolonged battery operation and automatically recharges the batteries when the notebook is used with an AC adapter. The power management modes and warnings include the following:
4-8
Theory
· · · · ·
LCD standby mode Hard disk standby mode System standby/suspend mode Battery-low warning Standby/suspend upon battery low
4.2.7.2
AC Adapter
The notebook uses an AC adapter with built in over voltage and short circuit protection. The adapter can with stand a continuous short-circuit to DC output without damage 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 is removed.
4.2.7.3
Primary Battery Pack
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 Specifications
Function
Battery type Cell structure Nominal voltage Cell energy capacity, Typical, Minimum Nominal rated capacity Operating Temperature_, Discharge, Charge Charge and discharge cycles Weight Battery discharge time
Specifications
NiMH (Nickel Metal-Hydride) 9 cells per pack (in series) 10.8 V 2400 mAH 2500 mAH, 2330 mAH, 27 Watt-hours -20 to 50°C (at 95%RH), 0 to 45°C (at 95%RH), 500 (minimum), 470 grams 3 hours (with APM) Battery charge time
Theory 4-9
4.2.7.4
Secondary Battery Pack
As an optional feature, the Floppy Drive can be removed from the notebook and a Li-Ion (Lithium Ion) secondary battery pack can be installed in the same cavity to provide additional battery operating time.
4-10
Theory
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
Overview of Fault Isolation Process
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 Adapter connections)- See Paragraph 5.4. Switch settings (ensure Power switch is On, and press Standby switch to ensure that Notebook is not in Standby mode; press Shift to 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 notebook indicating test failure (See Table 5-2)
Troubleshooting 5-1
START
COMPUTER TROUBLE INDICATION ?
NO
WHEN POWER SWITCH SET TO ON,, NO INDICATION OF POWER; SCREEN DARK, STATUS LED's EXTINGUISHED
DEAD COMPUTER SYMTOMS ? NO
YES
SEE PARAGRAPHS 5.3.1 & 5.3.2
SET POWER SWITCH TO ON. SELFTEST AUTOMATICALLY RUNS
RUN SELF TEST
ERROR MESSAGE ? NO
YES
SEE PARAGRAPH 5.3.4
MODEM PROBLEM ?
YES
SEE PARAGRAPH 5.3.5
NO RUN DIAGNOSTICS
DIAGNOSTICS ERROR MSG ? NO
YES
See Appendix D (PC Doctor)
Figure 5-1 Troubleshooting Flowchart
5-2 Troubleshooting
· · · · ·
Try rebooting the system (CTRL-ALT-DEL); restore system from diskettes, if necessary. If the computer is capable of running the Setup program; check the serial and parallel port configurations, and other features that may affect system operation. 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 a hard failure has occurred. Remove and replace suspect hardware (as described in Section 6 of this manual) and retest the system using the diagnostic tests as described in paragraph 5.3.5.
The detailed block diagram, shown in Figure 5-2, is useful in performing fault analysis of various internal subsystems. For example, an LCD hardware problem can be traced to either the LCD, Inverter Board, VR Board, or Battery Board. Other subsystem problems can be isolated in a similar fashion using the detailed block diagram as a troubleshooting tool.
5.3
Troubleshooting Procedures
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 running diagnostics. If the computer powers up and displays messages on the LCD or emits a series of beeps, skip to Paragraph 5.4.3 for further instructions.
5.3.1
Troubleshooting 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 AC Outlet, faulty AC Adapter, discharged Battery Packs, or faulty Power Supply Board). With a power problem, all LEDs are extinguished, the LCD screen is blank, the system does not respond when the standby switch several times consecutively and no 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:
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AC Adapter and Battery- Plug in the AC adapter and double check all connections on the Adapter and computer. Ensure that the Notebook Power switch is set to the On position and that the system is not in Standby or sleep mode. Measure the voltage at the AC Outlet or plug in a known good appliance (EG. a lamp) 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 recharged battery pack if batteryis discharged).
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Troubleshooting 5-3
Figure5-2 Troubleshooting Block Diagram
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If the AC outlet voltage, AC Adapter, and battery packs test normal but the computer will not power up, replace the Power Supply Board and/or Battery Board as described in Section 6.
5.3.2
Troubleshooting a Display Problem
If the LCD remains blank when you turn on the computer, and the status indicators light, check the following controls on the display (See Figure 3-1):
5-4 Troubleshooting
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LCD standby mode - If the LCD backlight remains off, even with the Contrast Control set to its highest position, the LCD may be in Standby Mode. Press the Standby or Power button 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 this manual. Low battery - Use a fully charged battery.
5.3.3
Fault Isolation Using Selftest
When the computer is first powered up, it automatically performs a self-test of its central hardware and memory functions. During self-test (which lasts for a few seconds), the display shows copyright and version number information.
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Note: Some procedures in this paragraph require you to use keystroke sequences, such as Ctrl-Alt-Del. To execute a keystroke sequence such as this, you must press all three keys simultaneously.
5.3.3.1
Self Test Error Messages
Upon successful completion of the self-test, the computer automatically loads its operating system and other built-in utilities. If the self-test fails to complete successfully, the display shows one of the error messages described in Appendix A.
5.3.4
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PCMCIA Modem Problems
If an optional PCMCIA modem does not work properly, check the following items: Proper installation of any PCMCIA options (check Modem settings under Control Panel). Dialing problem or wrong number - Try dialing a number that you have previously 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 software correctly.
Troubleshooting 5-5
5.3.5
Fault Isolation Using Diagnostics
PC-Doctor supplied with the Extensa 450 Series Notebooks is a powerful diagnostics 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 of interactive and non-interactive tests on attached devices. The test results are stored in a log which can be printed out (by pressing F2) or saved in a disk file (by pressing F3). Features of the diagnostic program are accessed through a series of pull-down menus and basic keyboard keys (cursor keys to move highlighted pointer, Enter key to select a highlighted feature, ESC key to cancel a function and move back one level. PC-Doctor is typically user friendly but if you don't understand a feature, context-sensitive "help" information is available at any time by pressing the F1 function key; pressing the F1 function key twice accesses the online Technical Reference 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 using system memory, IRQ and DMA use, what device drivers are installed, what COM and LPT ports are assigned and what ports are available, identifying partitioning data for fixed disk drive(s), determining the VGA setup information, reading the software interrupts/interrupt vectors, etc. Functionally, PC-Doctor includes the following:
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Group of nine non-Interactive diagnostic tests that perform a non-destructive test of the major hardware functions in the notebook (Processor, Memory, System board, video section, serial and parallel ports (when loopback adapters are installed), hard disk and floppy disk. Group of seven Interactive tests (require operator input) for testing the keyboard, 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 drivers are installed, what COM and LPT ports are assigned and what ports are available, partitioning data for fixed disk drive(s), VGA setup information, software interrupts and interrupt vectors. Group of special purpose utilities to run other tes