Texas Instruments 1 Main Board Assembly

Field Service 6-27

6.5.15 Removing/Replacing the Main Board Assembly

To remove and replace the Main Board Assembly, use the following procedure:

1. Turn off the computer; disconnect the AC power adapter (if it is attached),

and remove the battery pack and PCMCIA cards as described in Paragraphs

6.5.1 and 6.5.2. Also disconnect the MPB (Paragraph 6.5.3) if attached.

2. Remove the Keyboard Assembly as described in Paragraph 6.5.5.

3. Remove the Heat Sink Assembly as described in Paragraph 6.5.6.

4. Remove the Display Assembly as described in Paragraph 6.5.7.

5. Remove the Top Cover Assembly as described in Paragraph 6.5.10.

6. Remove fourteen screws from the bottom assembly as shown in Figure 6-20.

7. Remove the top cover as described in Paragraph 6.5.10.

8. Remove the Main Board Assembly.

9. Replacement is the reverse of Steps 1 through 8.

Figure 6-20 Removing/Replacing the Main Board Assembly

Main Board Assembly

Contents

Main Page Preface Introduction Intended Audience Contents Page Contents Paragraph Page Preface Section 1 General Description Section 2 Installation Section 3 Operating Instructions Section 5 Troubleshooting Procedures Section 6 Field Service Page Page 1 General Description 1.1 Introduction with Mobile Productivity Base 1.2 Product Overview Basic Extensa 900 Series Notebook Extensa 900 Series Page Figure 1-2 900 Series Notebook External Features 1.2.1 V ideo Display Features Bottom of Unit Page 1.2.2 Keyboard Features 1.2.3 Software Features 1.2.4 Standard Peripheral Devices 1.2.5 900 Series Connectivity Features 1.2.6 Notebook Expansion Capabilities 1.2.7 Memory Expansion 1.2.8 PCMCIA Card Options Expansion Memory Access Cover 1.2.9 Mobile Productivity Base Option 1.2.9.1 Docking and Undocking 1.2.9.2 Mobile Productivity Base Ports 1.2.9.3 Advanced PCI Card Options 1.3 Notebook Battery 1.4 Standard Test Features 1.4.1 Power On Self Test 1.4.2 PC-Doctor Diagnostics Program 1.5 Extensa 900 Series Specifications Video Subsystem External CRT Monitor Interface Table 1-5 Extensa 900 Specifications 1-16 General Description RS-232-D Serial Port: Parallel Port Fast I/R Port Mobile Productivity Base Ready 1.6 Regulatory Agency Approvals Page 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 In Windows 95 In Windows for Workgroups 2.3.3 Installing PCMCIA Options 2.4 Installing External Notebook Options 2.4.1 Installing the Mobile Productivity Base (Option) 2.4.1.1 Docking the Notebook to the MPB 2.4.1.2 Cabling to the MPB Page Page Page 2-10 Installation PARALLEL PORT PINOUTS Note: 2.4.4 Installing an Exter nal Serial Port Device * Denotes Active Low 2.4.5 Installing an Exter nal VGA Monitor Page 2.5 Primary Battery Pack Installation 2.6 Installing the AC Power Adapter 2.7 Initial Software Load DC-IN Connector AC Adapter Page 3 Operating Instructions 3.2.1 Power On/Of f Switch 3.2.2 Notebook LEDs 3.2.3 LED Icons 3.2.4 Keyboard Hot Key Sequences Standby Mode Indicator A Extensa 900 Series Users Guide Power/Battery-low Indicator 3-4 Operating Instructions Table 3-3 Hot Keys Available on Attached External keyboard Table 3-2 Summary of Notebook Hot Key Sequences 3.2.4.1 Windows 95 Special Keys 3.2.4.2 DOS Special Keys 3.3 Configuring the Touchpad 3.4 Using a CD-ROM Drive (MPB Option Only) 3.4.1 Inserting a CD (MPB Option Only) 3.4.2 Handling CDs (MPB Option Only) 3.5 Built-In Sound System 3.5.1 Tur ning Sound On/Off 3.5.2 Sound Software 3.5.3 Exter nal Sound Equipment 3.6 Using Remote Connections 3.6.1 Using the Fast Infrared (FIR) Port 3.7 Using Zoomed Video Features 3.7.1 MPEG PC Card 3.8 Battery Saving Tips 3.8.1 Lowering Inactivity T imeouts 3.8.2 Suspending Operation While Idle 3.8.3 Responding to a Low Battery Condition 3.8.4 Replacing the battery 3.8.5 Saving to Disk Page 4 Theory of Operation 4.1 Introduction 4.2 Notebook Functional Overview 4-2 Theory of Operation Figure 4-1 Extensa Functional Block Diagram M1521 M1523 4.2.1 System Processor 4-4 Theory of Operation FDD PCI Card Advanced Notebook MPB CPU M1521 ESS1878S M38813 M6377 87338 Figure 4-2 Detailed System Block Diagram M1523 PCI BUS ISA BUS 4.2.2 Memory Subsystem 4.2.2.1 Main Memory 4.2.2.2 Flash ROM 4.2.3 System Controller Function Table 4-4 I/O Address Map Address Range Device Page Page Page Page 4.2.4 V ideo Subsystem 4.2.4.1 C&T 65550 Features 4.2.4.1.1 Hardware MultiMedia Support 4.2.4.2 Versatile Panel Support 4.2.4.3 Low Power Consumption 4.2.5 Sound Subsystem 4.2.5.1 ESS1878 Audio Controller with Interface to Expansion Audio Mixer 4.2.6 Keyboard Subsystem 4.2.7 I/O Subsystem Page Page 4.2.8 Hard Disk Drive Subsystem 4.2.9 Floppy Disk Drive Subsystem 4.2.10 PCMCIA Subsystem Page 4.2.11 Power Subsystem Figure 4-3 Power Subsystem Simplified Block Diagram Page Table 4-5 M6377 GPIO Port Definitions Item Description 4-24 Theory of Operation Table 4-5 M6377 GPIO Port Definitions (Continued) Item Description 4.2.11.2 AC Power Adapter 4.2.12 Mobile Productivity Base Interface Notebook MPB 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 5.5 5.3 Troubleshooting Procedures 5.3.1 T roubleshooting a Power Supply Problem 5.3.2 T roubleshooting a Display Problem 5.3.3 Fault Isolation Using Power On Self Test 5.3.3.1 POST Error Messages 5-6 Troubleshooting Procedures Table 5-2 Power On Self Test Error Messages Message Possible Cause Action Table 5-2 Post Error Messages (continued) Message Possible Cause Action 5-8 Troubleshooting Procedures 5.3.3.2 POST Beep Error Messages Table 5-2 POST Error Messages (continued) Message Possible Cause Action 5.3.4 Run-T ime Error Messages 5.3.5 PCMCIA Modem Problems 5.4 General Fault Isolation Procedures Table 5-5 General Troubleshooting Procedures Problem Corrective Actions 5-12 Troubleshooting Procedures Table 5-5 General Troubleshooting Procedures (continued) Table 5-5 General Troubleshooting Procedures (continued) 5.5 Fault Isolation Using Diagnostics 5.5.1 PC-Doctor (In DOS Mode or DOS W indow) 5.5.2 Supporting Online Documentation 5.5.3 User Inter face to PC-Doctor 5.5.4 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 6.4.1 Cover-Display Assembly Notebook Assemblies Field Service 6-5 . Figure 6-2 Display FRUs Table 6-1 Top Cover Assembly Field-Replaceable Units (FRUs) 6.4.2 System Base Assembly Field Service 6-7 Table 6-2 Base Assembly Field-Replaceable Units (FRUs) Base Assembly FRU Description Assembly/ Disassembly Paragraph TI Part No. 6-8 Field Service Table 6-2 Base Assembly Field-Replaceable Units (FRUs) TI Part No. Base Assembly FRU Description Assembly/ Disassembly Paragraph 6.4.3 Mobile Productivity Base Assembly 6.5 Notebook FRU Replacement Procedures 6.5.1 Removing/Replacing the Notebook Battery Pack 6.5.2 Removing/Replacing PCMCIA Options Page Page 6.5.4 Removing/Replacing the Hard Disk Drive Assembly 6.5.5 Removing/Replacing the Keyboard Assembly 6.5.6 Heat Sink Assembly Removal/Replacement 6.5.7 Display Assembly Removal/Replacement 6.5.8 Removing/Replacing the LED/Microphone Board Assembly 6.5.9 Removing/Replacing the CPU Board 6.5.10 Removing/Replacing the Top Cover 6-22 Field Service Figure 6-15 Removing/Replacing the Top Cover 6.5.11 Removing/Replacing the VGA Video Board 6.5.12 Removing/Replacing the Power Supply Board 6.5.13 Removing/Replacing the DC-In Board Assembly 6.5.14 Removing/Replacing the PC Card Module 6.5.15 Removing/Replacing the Main Board Assembly Main Board Assembly 6.5.16 Removing Touchpad and Speakers 6.5.17 Removing/Replacing the Display Bezel 6.5.18 Removing/Replacing the LCD 6.5.19 Removing/Replacing the Display Inverter Boards CN2 6.6 Removing/Replacing MPB FRUs 6.6.1 Removing/Replacing the Media Bay Device 6.6.2 Removing/Replacing the MPB Battery 6.6.3 Removing/Replacing the MPB Housing 6.6.4 Removing/Replacing the Docking Cable Release Docking Cable Remove Docking Cable Screws 6.6.5 Removing/Replacing the Docking Mechanism Docking Mechanism 6.6.6 Removing/Replacing the MPB DC-DC Converter DC-DC Converter CN8, CN9 6.6.7 Removing/Replacing the MPB Main Board Assembly Page Page Page Page Page Page Page A-8 Notebook Schematic Diagrams Figure A-1 Notebook Main Board Logic Diagrams (Sheet 7 of 30) DIMM SOCKET Page Page Page Page Page A-14 Notebook Schematic Diagrams Figure A-1 Notebook Main Board Logic Diagrams (Sheet 13 of 30) RTC BIOS ROM Figure A-1 Notebook Main Board Logic Diagrams (Sheet 14 of 30) ON OFF KEYBOARD CONTROLLER M38813 A-16 Notebook Schematic Diagrams SUPER I/O CONTROLLER PC87338 Page Page Page Page Page Page Page Page Page A-26 Notebook Schematic Diagrams Figure A-1 Notebook Main Board Logic Diagrams (Sheet 25 of 30) DEBUG-BD GOLDEN FINGER Figure A-1 Notebook Main Board Logic Diagrams (Sheet 26 of 30) PS2 INTERFACE TOUCHPAD CONNECTOR A-28 Notebook Schematic Diagrams Figure A-1 Notebook Main Board Logic Diagrams (Sheet 27 of 30) CHARGER INTERFACE CIRCUIT Figure A-1 Notebook Main Board Logic Diagrams (Sheet 28 of 30) LED INTERFACE Page Figure A-1 Notebook Main Board Logic Diagrams (Sheet 30 of 30) Page Page B-2 MPB Schematic Diagrams P CPU BOARD CONNECTOR Figure B-1 MPB CPU Board Logic Diagrams (Sheet 1 of 3) Page B-4 MPB Schematic Diagrams Not Installed THERMAL SENSOR Figure B-1 MPB CPU Board Logic Diagrams (Sheet 3 of 3) Figure B-2 MPB Battery Board Logic Diagrams (Sheet 1 of 1) B-6 MPB Schematic Diagrams Figure B-3 MPB Main Board (Motherboard) Logic Diagrams (Sheet 1 of 10) DOCKING CONNECTOR SB 5 6 IDE CONTROLLER 9 5 7 6 Page AUDIO AMP. MPB DC_IN B.D CONN. SB Figure B-3 MPB Main Board (Motherboard) Logic Diagrams (Sheet 4 of 10) T329 TP328 Page DC/DC SC Figure B-3 MPB Main Board (Motherboard) Logic Diagrams (Sheet 6 of 10) B-12 MPB Schematic Diagrams 24C02 CHARGER I/F Figure B-3 MPB Main Board (Motherboard) Logic Diagrams (Sheet 7 of 10) Advanced PCI I/F Figure B-3 MPB Main Board (Motherboard) Logic Diagrams (Sheet 8 of 10) PS/2 , USB CONN.& NO USE GATE B-14 MPB Schematic Diagrams Figure B-3 MPB Main Board (Motherboard) Logic Diagrams (Sheet 9 of 10) Figure B-3 MPB Main Board (Motherboard) Logic Diagrams (Sheet 10 of 10) B-16 MPB Schematic Diagrams Figure B-4 MPB VGA Board Logic Diagrams (Sheet 1 of 5) 2 VGA BOARD CONNECTOR @32K2 5 33 52 65550-B VGA CONTROLLER Figure B-4 MPB VGA Board Logic Diagrams (Sheet 2 of 5) SB SB 2M VRAM B-18 MPB Schematic Diagrams Figure B-4 MPB VGA Board Logic Diagrams (Sheet 3 of 5) ) LCD I/F Figure B-4 MPB VGA Board Logic Diagrams (Sheet 4 of 5) VOLTAGE SWITCH B-20 MPB Schematic Diagrams Figure B-4 MPB VGA Board Logic Diagrams (Sheet 5 of 5) ) Figure B-5 MPB DC In Board Logic Diagrams (Sheet 1 of 1) B-22 MPB Schematic Diagrams Figure B-6 MPB LED Board Logic Diagrams (Sheet 1 of 1) 1 POWER_SW2 SW1 SW-SPVE1 C POST BIOS C.1 Introduction This section contains a listing of the POST BIOS calls for the Extensa 900 Series Notebook. C-2 POST BIOS Page C-4 POST BIOS