Toshiba T2100 Series User Manual

T2100 Series
1-1
1.1 Features
The Toshiba T2100/T2105 Series computers are one of the lightest and most advanced
portable computers available. Utilizing advanced technology and high-speed components, the
computer offers excellent display legibility, battery operation and IBM PC/AT compatibility.
References to the T2100, T2100CS, and T2100CT models relate directly to the T2105,
T2105CS, and T2105CT models respectively.
The T2100/T2105 Series computer system units consist of the following features:
❑ Microprocessor
The SL Enhanced Intel 486DX2-50 microprocessor operates at 50 MHz, 3.3 Volts.
❑ Math coprocessor
The math coprocessor is stored in the i486DX2 microprocessor.
❑ Cache memory
Eight (8) KB of cache memory is stored in the i486DX2 microprocessor.
❑ Disk storage
The T2100 has an internal 260 MB HDD.
The T2100CS/T2100CT has an internal 350 MB HDD.
A 3.5-inch Floppy Disk Drive (FDD) supports 2 HD floppy disks (1.44 Mbytes) and
2DD floppy disks (720 Kbytes).
❑ Memory
The T2100/T2100CS comes standard with 4 MB of CMOS Random Access Memory
(RAM), and the T2100CT comes with 8 MB RAM, 3.3 Volts. This includes 640 KB
of conventional memory with 3,264 KB of extended memory for the T2100/T2100CS
and 7,360 KB for the T2100CT, which can be utilized as expanded memory compat-
ible with the Lotus/Intel/Microsoft Expanded Memory Specifications (LIM-EMS).
❑ Monochrome LCD (T2100)
A high-resolution, Liquid Crystal Display (LCD) displays 640x480 pixels with 64-level
gray scale. The T2100 internal display controller supports Video Graphics Adapter
(VGA) functions on the internal display device.
❑ STN color LCD (T2100CS)
A high-resolution, Supertwist Nematic (STN) color Liquid Crystal Display (LCD)
displays 640x480 pixels with 256 colors. The T2100CS internal display controller
supports Video Graphics Array (VGA) and Super VGA (SVGA).

Toshiba T2100 Series Specifications

General

Brand	Toshiba
Model	T2100 Series
Category	Laptop
Language	English

Summary

Toshiba T2100/T2105 Series Features

Microprocessor Specifications

Details the Intel 486DX2-50 microprocessor's speed and voltage.

Disk Storage Options

Describes internal HDD sizes and the 3.5-inch Floppy Disk Drive.

Memory Configuration

Outlines standard RAM amounts for T2100/T2100CS and T2100CT models.

Monochrome LCD Display

Details the T2100's monochrome LCD resolution and grayscale capabilities.

STN Color LCD Display

Describes the T2100CS's STN color LCD resolution and color depth.

TFT Color LCD Display

Details the T2100CT's TFT color LCD resolution and color depth.

Keyboard Features

Describes the 82/84-key enhanced keyboard and its IBM compatibility.

Battery Types

Lists the main, backup, and Real Time Clock (RTC) batteries.

PCMCIA Card Slot Information

Details the two PCMCIA slots and their supported card types.

System Ports Overview

Covers parallel, RS-232-C, keyboard, port replicator, and external monitor ports.

Memory Module Slot

Explains the slot for installing optional Toshiba memory modules.

AccuPoint Pointing Stick

Describes the pointing control stick located on the keyboard.

System Unit Block Diagram

Floppy Disk Drive Specifications

Hard Disk Drive Specifications

Keyboard Details

LCD Display Modules

Monochrome LCD Module

Details the monochrome LCD specifications like resolution and contrast.

Monochrome FL Inverter Board

Specifies input/output voltage, power, current, and frequency for the inverter board.

STN Color LCD Module

Details the STN color LCD specifications like resolution and contrast.

STN Color FL Inverter Board

Specifies input/output voltage, power, current, and frequency for the STN inverter board.

TFT Color LCD Module

Details the TFT color LCD specifications like resolution and contrast.

TFT Color FL Inverter Board

Specifies input/output voltage, power, current, and frequency for the TFT inverter board.

Power Supply Information

Battery System Details

Main Battery Functionality

Describes the main battery as the primary power source and its indicator.

Backup Battery Specifications

Details the backup battery's charging time and data preservation period.

Troubleshooting Procedures

Troubleshooting Flowchart Guide

Provides a flowchart for determining troubleshooting steps.

Power Supply Troubleshooting Steps

Guides on checking AC IN LED and Battery LED indicators.

System Board Troubleshooting Methods

Covers message checks, LED checks, and diagnostic test execution.

Floppy Disk Drive Troubleshooting

Details FDD head cleaning, diagnostic tests, and connector checks.

Hard Disk Drive Troubleshooting Steps

Covers partition, message, format, and diagnostic test checks for HDD.

Keyboard Troubleshooting Procedures

Guides on keyboard diagnostic tests and connector checks.

Display Troubleshooting Steps

Includes contrast, external CRT, diagnostic tests, connector, and replacement checks.

Diagnostic Test Suite Overview

Executing Diagnostic Tests

Instructions on starting and running the diagnostic program.

System Test Functions

Details ROM checksum and hardware status checks.

Memory Test Procedures

Covers constant data, address pattern, refresh, and protected mode tests.

Keyboard Test Functions

Explains pressed key display, scan code, PS/2 mouse, and pointing stick tests.

Display Test Functions

Covers VRAM, character attributes, graphics modes, and display page tests.

Floppy Disk Test Operations

Details sequential read, random data, and specified address tests.

Printer Test Functions

Covers ripple pattern, function, and wraparound tests for printers.

Hard Disk Test Procedures

Details sequential read, address uniqueness, and cross talk tests.

Error Code Reference

Lists error codes and their corresponding status names for diagnostics.

Hard Disk Format Options

Explains low-level and MS-DOS formatting options for HDDs.

Running System Tests

Automates sequential execution of system, memory, display, FDD, HDD, and printer tests.

System Configuration Details

Displays BIOS, Boot ROM, KBC, PS Micom versions, and hardware configuration.

System Setup Utility

Allows configuration of memory, display, battery, hard disk, and I/O ports.

Hardware Disassembly and Replacement

General Disassembly Guidelines

Overview of FRUs and removal sequence.

Pre-Disassembly Precautions

Essential steps and safety measures before disassembling the computer.

Tools and Equipment List

Lists necessary tools like screwdrivers and ESD equipment.

Battery Pack Removal and Installation

Step-by-step instructions for removing and installing the battery pack.

Optional Memory Module Replacement

Procedures for removing and installing optional memory modules.

Keyboard Removal and Installation

Detailed steps for removing and installing the computer keyboard.

Hard Disk Drive Replacement

Instructions for removing and installing the hard disk drive unit.

System Board and Batteries Replacement

Procedures for removing and installing the system board and batteries.

Display Mask Replacement

Steps for removing and installing the computer's display mask.

LCD Module Replacement Procedures

Instructions for removing and installing the LCD module.

FL Inverter Board Replacement

Steps for removing and installing the Fluorescent Lamp inverter board.

T2100CT LCD Module Replacement

Procedures for removing and installing the T2100CT LCD module.

T2100CT FL Replacement

Steps for removing and installing the T2100CT Fluorescent Lamp.

Appendix A: LCD Module Handling Precautions

Appendix B: System Board Layout

Appendix C: Pin Assignments

Appendix D: USA Display Codes

Appendix E: Keyboard Scan/Character Codes

Appendix F: Keyboard Layouts

Appendix G: Wiring Diagrams

Appendix H: Deleting the Password

Appendix I: BIOS Rewrite Procedures