Texas Instruments 60X M1521, M1523

4-2 Theory of Operation

Figure 4-1 Extensa Functional Block Diagram

4.2.1 System Processor

The System Processor function for the notebook is implemented on the Motherboard

in the form of an Intel Pentium P54-C Superscalar 586 Processor Chip. The processor

operates in conjunction with RAM and ROM Memory and other control logic to process

software instructions (BIOS, DOS, Windows, and applications). The processor

communicates with the hard disk drive and the memory components using high speed

busses.

The Processor also interacts with other hardware logic to provide the power savings

features for the notebook. These features include controlling CPU clock speeds,

reducing clock speeds whenever possible (e.g. when performing floppy disk drive

accesses), powering down unused devices, etc.

586

M1521

BGA

DRAM

HDD

M1523

IDE Master

USB connector

controller

Graphic

UMA

SRAM

CPU Bus

ISA Bus

PCI Bus

CPU

Contents

Main Page Preface Introduction Intended Audience Contents Page Contents Preface Section 1 General Description Section 2 Installation Section 2 Installation (continued) Section 3 Operating Instructions Section 4 Theory of Operation Section 5 Troubleshooting Procedures Section 5 Troubleshooting Procedures (continued) Section 6 Field Service Section 6 Field Service (continued) Appendix A Model 60x Maintenance Data Appendix B Model 65x Maintenance Data 1 General Description 1.1 Introduction 1.2 Product Overview 1.2.1 Notebook Model Summary Table 1-2 contains a summary of the available models in the 60x and 65x Series. * Standard Module Bay 1.2.2 Extensa 60x Series 1.2.3 Extensa 65x Series Notebooks Page 1.2.4 Video Display Features 1.2.4.1 Internal LCD Touchpad Pointing Device 1.2.5 Software Features Operating System Description 1.2.6 60x Series External Ports PS/2 Port 1.2.7 65x Series External Ports 1.2.8 Standard Peripheral Devices 1.2.9 Expansion Capabilities 1.2.10 PCMCIA Card Options Expansion Feature Description 1.3 Standard Test Features 1.3.1 Power On Self Test 1.3.2 PC-Doctor Diagnostics Program 1.4 International Product Models Configuration Dash No. 1-16 General Description 1.5 Extensa 60x and 65x Series Specifications General specifications for the Extensa 60x and 65x Series Notebooks are provided in Table 1-8. Flash ROM: 655CD Model 650CD Model FDD Disk Storage Capacity Disk Size Drive Height Mode CD-ROM Drive LCD Display Video Subsystem Characteristic Model 655CD Model 650CD Model 605CD Model External CRT Monitor Interface Connector Type Monitors Supported Characteristic Model 655CD Model 650CD Model 1-20 General Description RS-232-D Serial Port Method Bits per second: Transmit Receive: Data word: 16550 UART Support Selectable Serial Port (BIOS Setup) Parallel Port Connector Type FDD Support Selectable Parallel Port (BIOS Setup) Serial I/R Port Transfer Data Rate Transfer Distance Standard Characteristic Model 1.6 Regulatory Agency Approvals 2 Installation 2.1 Introduction 2.2 Unpacking Instructions 2.3 Installing Internal Notebook Options 2.3.1 Installing Main Memory Expansion (Optional) 2.3.2 Setting up the Software 2.4 Installing External Options 2.4.1 Installing PCMCIA Options Page Page 2.5.2 Installing an External Parallel Printer or Floppy Drive 60X Series Notebook k PARALLEL PORT PINOUTS PLP122 2.5.3 Installing an External Serial Port Device 2.5.4 Installing an External VGA Monitor 2.5.5 Installing the Security Lock Option 2.6 Battery Pack Installation 2.7 Installing the AC Power Adapter DC-IN AC Adapter 2.8 Initial System Checkout AC Power (120VAC to 230 VAC, 50 to 60 Hz) Page 3 Operating Instructions 3.1 Introduction 3.2 Controls/Indicators 3.2.1 Power On/Off Switch 3.2.2 Notebook LEDs 3.2.2.1 Hot Key Sequences Function Key Sequence Page Theory of Operation 4.1 Introduction 4.2 Notebook Functional Overview 4.2.1 System Processor 586 M1521 M1523 4.2.2 Memory Subsystem 4.2.2.1 Main Memory 4.2.2.2 Flash ROM 4.2.3 V ideo Subsystem 4.2.4 Sound Subsystem 4.2.5 Keyboard Subsystem 4.2.6 Hard Disk Drive Subsystem 4.2.6.1 Hard Disk Drive Power Management 4.3 Detailed Circuit Theory 4-6 Theory of Operation 4.3.1 Major Components Component Table 4-1 shows a listing the of the major components used in the Extensa Series Notebooks. 4.3.2 System Architecture Table 4-1 Major Chips List SYSTEM ARCHITECTURE XD - TTL GC ISA addr ALI M1521 (PCI, Cache, and Memory Controller) Page 4-10 Theory of Operation 4.3.2.1 ALI M1523 (PCI-ISA Bridge) Figure 4-4 M1523 Chip Simplified Block Diagram M1523 Block Diagram 4-12 Theory of Operation Figure 4-5 M1523 Pinouts ALi M1523 Page Page Page 4.3.2.4 C&T 65550 High Performance Flat Panel / CRT VGA Controller Page 4.3.2.5 TI1130 PCMCIA Controller Page 4-20 Theory of Operation 4.3.2.6 NS87336VJG Super I/O Controller 4-22 Theory of Operation A simplified block diagram of the Super I/O controller is provided in Figure 4-10. Figure 4-10 Super I/O Controller Block Diagram 4.3.2.6 ESS1688 Audio Controller Page 5 Troubleshooting Procedures 5.1 Introduction 5.2 Overview of Fault Isolation Process 5-2 Troubleshooting Procedures Figure 5-1 Notebook Computer Troubleshooting Flow Chart See Paragraphs 5.3.3.1 and 5.3.3.2 See Paragraph 5.4 5.3 Troubleshooting Procedures 5.3.1 T roubleshooting a Power Supply Problem 5.3.2 T roubleshooting a Display Problem Cable Mother Panel Display Problem Description Inverter Board LCD Board BIOS 5.3.3 Fault Isolation Using Self Test 5.3.3.1 Self Test Error Messages Page Page 5.3.3.2 Self Test Beep Error Messages Page 5.3.4 PCMCIA Modem Problems 5.4 Fault Isolation Using Diagnostics 5.4.1 PC-Doctor (In DOS Mode or DOS W indow) 5.4.2 Supporting Online Documentation 5.4.3 User Inter face to PC-Doctor 5.4.4 Quitting PC-Doctor Page 6 Field Service 6.1 Introduction 6.2 Preventive Maintenance 6.2.1 Cleaning the Computer 6.2.2 Handling the Computer 6.2.3 Handling the Computer Battery Pack 6.2.4 Password Caution 6.3 Required Tools and Equipment 6.4 Notebook FRUs 6.5 FRU Removal/Replacement Procedures 6.5.1 Removing/Replacing the Notebook Battery Pack Unplugging the Cable Connecting the Cable Page 6.5.2 Removing/Replacing PCMCIA Options Page Reference View Removing the HDD 6.5.4 Removing/Replacing the Keyboard Assembly 6.5.5 Removing/Replacing Expansion Memory Removing Keyboard J0102 J0103 J0104 Page 6.5.6 Removing the Heat Sink Assembly 6.5.7 Removing/Replacing the CPU Chip 6.5.8 FDD/CD-ROM Drive Removal 6.5.8.1 60x Series Drive 6.5.8.2 Removing/Replacing 65x Series Module 6.5.9 Removing/Replacing the Display Assembly 6.5.10 Removing/Replacing the Top Cover 6.5.11 Removing/Replacing the Fan Assembly 6.5.11.1 (60x Series) 6.5.11.2 Removing Fan Assembly (65x Series) 6.5.12 Removing/Replacing the LED Board (65x Series) 6.5.13 Removing/Replacing the Battery Board (65x Series) 6.5.14 Removing/Replacing Inside Frame Assy. (60x Series) 6.5.15 Removing/Replacing Inside Frame Assy (65x Series) 6.5.16 Removing/Replacing the Power Supply Board 6.5.17 Removing/Replacing the Motherboard Assembly 6.5.17.1 60x Series Motherboard Assembly J21 J12 J13 J14 Page 6.5.18 Removing/Replacing FIR/Audio Board (65x Series) Page Page 6.5.19 Removing/Replacing the VGA Video Board (60X Only) 6.5.20 Removing/Replacing the PCMCIA Connector Module 6.5.21 Removing/Replacing the Touchpad Assembly 6.5.22 Removing/Replacing the Display Bezel Page 6.5.23 Removing/Replacing the Display Inverter Boards 6.5.24 Removing/Replacing the LCD Panel Page A Model 60x Maintenance Data A.1 Introduction A.2 Model 60x Features Summary A.3 Field-Replaceable Units (FRUs) Page Display Assembly Shown with Bezel Removed A.3.2 System Base Assembly Bottom of Unit Page Page A.4 Logic Diagrams Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page B Model 65x Maintenance Data B.1 Introduction B.2 Model 65x Features Summary B.3 Field-Replaceable Units (FRUs) Page Display Assembly Shown with Bezel Removed Page B.3.2 System Base Assembly Page Page B.4 65x Logic Diagrams Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Figure 1-16 Main Board Jumpers and Connectors (Bottom Side)