Toshiba T2105 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 T2105 Series Specifications

General

Brand	Toshiba
Model	T2105 Series
Category	Laptop
Language	English

Summary

T2100 Series Features and Components

Microprocessor and Memory Details

Details the Intel 486DX2 microprocessor, cache, and RAM configurations (4MB/8MB).

Display Options Overview

Describes Monochrome, STN Color (T2100CS), and TFT Color (T2100CT) LCD displays.

Storage and Connectivity Ports

Covers disk storage (HDD/FDD) and I/O ports like Parallel, Serial, and External Monitor.

Power Supply and Battery Systems

Information on the AC Power Supply unit and the three types of batteries.

Troubleshooting Procedures

Power Supply Troubleshooting Guide

Steps to diagnose power supply issues using AC IN and Battery LED indicators.

System Board Diagnostics

Methods for diagnosing system board faults via messages and port LED checks.

Hard Disk Drive Fault Diagnosis

Procedures for diagnosing HDD problems, including partition, format, and message checks.

Display Malfunction Diagnosis

Steps to diagnose display issues using external CRT and diagnostic tests.

Diagnostic Test Functions

System and Memory Test Procedures

Covers ROM checksum, hardware status, and memory integrity testing.

Keyboard and Display Test Execution

Guides for testing keyboard input, scan codes, and display modes.

Drive, Printer, and Async Tests

Tests for Floppy Disk Drive, Hard Disk Drive, Printer, and Async ports.

Expansion and System Configuration Tests

Tests for PCMCIA expansion slots and system configuration checks.

Disassembly and Reassembly Guide

FRU Removal and General Procedures

Lists Field Replaceable Units (FRUs) and outlines general disassembly steps.

Battery Pack Servicing

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

Hard Disk Drive and System Board Procedures

Instructions for removing/installing the HDD and System Board.

Display and Drive Component Replacement

Procedures for replacing top cover, display assembly, and floppy disk drive.