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Toshiba Personal Computer
Satellite A20 Series
Maintenance Manual
TOSHIBA CORPORATION
File Number 960-444

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Chapters

Troubleshooting

   Also See for Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz

   Related Manuals for Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz

   Summary of Contents for Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz

  • Page 1

    Toshiba Personal Computer Satellite A20 Series Maintenance Manual TOSHIBA CORPORATION File Number 960-444...

  • Page 2

    © 2003 by Toshiba Corporation. All rights reserved. Under the copyright laws, this manual cannot be reproduced in any form without the prior written permission of Toshiba. No patent liability is assumed with respect to the use of the information contained herein.

  • Page 3

    NOTE: “Note” contains general information that relates to your safe maintenance service. Improper repair of the computer may result in safety hazards. Toshiba requires service technicians and authorized dealers or service providers to ensure the following safety precautions are adhered to strictly.

  • Page 4

    The manual is divided into the following parts: Chapter 1 Hardware Overview describes the Satellite A20 Series system unit and each FRU. Chapter 2 Troubleshooting Procedures explains how to diagnose and resolve FRU problems. Chapter 3 Test and Diagnostics describes how to perform test and diagnostic operations for maintenance service.

  • Page 5

    Conventions This manual uses the following formats to describe, identify, and highlight terms and operating procedures. Acronyms On the first appearance and whenever necessary for clarification acronyms are enclosed in parentheses following their definition. For example: Read Only Memory (ROM) Keys Keys are used in the text to describe many operations.

  • Page 6

    Satellite A20 Maintenance Manual (960-444)

  • Page 7: Table Of Contents

    Table of Contents Chapter 1 Hardware Overview Features........................1-1 System Unit Block Diagram..................1-7 2.5-inch Hard Disk Drive ...................1-14 CD-RW/DVD Drive....................1-16 DVD-R/-RW Drive ....................1-19 DVD Multi Drive .......................1-20 Keyboard ........................1-23 TFT Color Display.....................1-24 Power Supply ......................1-26 1.10 Batteries ........................1-28 Chapter 2 Troubleshooting Procedures Troubleshooting ......................

  • Page 8: Table Of Contents

    2.14 SD Card Troubleshooting................... 2-59 Chapter 3 Tests and Diagnostics The Diagnostic Test...................... 3-1 Executing the Diagnostic Test ..................3-3 Subtest Names......................3-7 System Test......................... 3-9 Memory Test......................3-12 Keyboard Test......................3-14 Display Test....................... 3-18 Floppy Disk Test ....................... 3-22 Printer Test........................

  • Page 9: Table Of Contents

    Chapter 4 Replacement Procedures General........................4-1 Battery Pack........................ 4-9 Optional PC Card...................... 4-11 Optional SD Card...................... 4-13 HDD ......................... 4-14 Modem Daughter Card ....................4-18 Slim Select Bay Module ..................... 4-20 Cooling Fan....................... 4-24 CPU.......................... 4-27 4.10 Keyboard ........................4-32 4.11 Memory Module......................

  • Page 10

    4.30 Wireless LAN Antenna/Blutooth Antenna/Display Cover..........4-76 4.31 Fluorescent Lamp ...................... 4-85 Appendices Appendix A Handling the LCD Module ................A-1 Appendix B Board Layout....................B-1 Appendix C Pin Assignments....................C-1 Appendix D Keyboard Scan/Character Codes..............D-1 Appendix E Key Layout......................E-1 Appendix F Wiring Diagram....................F-1 Appendix G...

  • Page 11

    Chapter 1 Hardware Overview...

  • Page 12

    1 Hardware Overview 1-ii Satellite A20 Maintenance Manual (960-444)

  • Page 13

    1 Hardware Overview Chapter 1 Contents Features ........................1-1 System Unit Block Diagram..................1-7 2.5-inch Hard Disk Drive................... 1-14 CD-RW/DVD Drive....................1-16 DVD-R/-RW Drive ....................1-19 DVD Multi Drive ....................... 1-20 Keyboard........................1-23 TFT Color Display..................... 1-24 1.8.1 LCD Module ..................1-24 1.8.2 FL Inverter Board ................

  • Page 14

    1 Hardware Overview Figures Figure 1-1 Front of the computer ..................1-5 Figure 1-2 System unit configuration.................. 1-6 Figure 1-3 System unit block diagram................1-7 Figure 1-4 2.5-inch HDD....................1-14 Figure 1-5 CD-RW/DVD drive ..................1-16 Figure 1-6 DVD-R/-RW drive..................1-19 Figure 1-7 DVD Multi drive....................

  • Page 15: Features

    1 Hardware Overview Features Features The Toshiba Satellite A20 Personal Computer uses extensive Large Scale Integration (LSI), and Complementary Metal-Oxide Semiconductor (CMOS) technology extensively to provide compact size, minimum weight, low power usage and high reliability. The computer is built and configured to order, to best meet the customer’s needs.

  • Page 16

    1 Hardware Overview 1.1 Features q CD-RW/DVD Drive A full-size, CD-RW/DVD- ROM drive module lets you run CD/DVDs without using an adaptor. It reads DVD-ROMs at maximum 8 speed and CD-ROMs at maximum 24 speed. It writes CD-R at up to 24 speed and CD-RW at up to 10 speed. A Mode Control button turns power to the fixed CD-RW/DVD-ROM drive on and off so you can use the drive as a stand-alone audio CD player.

  • Page 17: Internal Lan

    1.1 Features 1 Hardware Overview q Display The following displays are available: 14.1-inch XGA TFT screen, 1,024 768 pixels, 16M colors 15.0-inch XGA TFT screen, 1,024 768 pixels, 16M colors 15.0-inch SXGA+ TFT screen, 1,400 1,050 pixels, 16M colors A video controller contained on the north bridge and 4MB, 8MB, 16MB or 32MB of SMA VRAM enable an external monitor with an RGB cable to display 64k colors at a resolution of 1,600 x 1,200 pixels.

  • Page 18

    1 Hardware Overview 1.1 Features q Wireless LAN (mini PCI Card slot) In some models, a Mini PCI Card with wireless LAN functions is available as a dealer- installed option. The mini PCI Card for wireless LAN is compatible with other LAN systems based on Direct Sequence Spread Spectrum radio technology that complies with the IEEE 802.11b or a/b.

  • Page 19

    1.1 Features 1 Hardware Overview q Internal modem The internal modem is equipped as a modem daughter card (MDC). The internal modem provides capability for data and fax communication and supports ITU-TV.90. In the U.S. and Canada, V.92 is supported. For data reception it operates at 56,000bps and for data transmission it operates at 33,600bps.

  • Page 20

    1 Hardware Overview 1.1 Features Figure 1-2 System unit configuration Satellite A20 Maintenance Manual (960-444)

  • Page 21: System Unit Block Diagram

    1.2 System Unit Block Diagram 1 Hardware Overview System Unit Block Diagram Figure 1-3 is the block diagram of the system unit. Figure 1-3 System unit block diagram Satellite A20 Maintenance Manual (960-444)

  • Page 22

    1 Hardware Overview 1.2 System Unit Block Diagram The system unit is composed of the following major components: q Processor Intel Desktop Pentium 4 Processor 2.53GHz – Processor core speed: 2.53GHz at 1.525V – Processor bus speed: 533MHz – Integrated L1 cache memory: 12KB instruction cache and 8KB write-back data cache, 4-way set associative –...

  • Page 23

    1.2 System Unit Block Diagram 1 Hardware Overview q PCI Chip Set North Bridge ALi M1672 Northbridge with Integrated Graphic Chip ALi PCI Northbridge Core Logic Processor Support – Supports Intel Pentium 4 microprocessor family with host bus frequency can be up to 400MHz –...

  • Page 24

    1 Hardware Overview 1.2 System Unit Block Diagram PCI Bus Support – Supports synchronous / asynchronous clock mode between the processor bus and the PCI bus – 32-bit Address / Data PCI bus using PCI bus driver technology – Supports up to 5 PCI masters excluding the M1672 and PCI-to-ISA bridge –...

  • Page 25

    1.2 System Unit Block Diagram 1 Hardware Overview South Bridge ALi M1535+ Southbridge – Provides a high integration bridge between the PCI Bus and Peripheral Bus (PCI spec. 2.2 Compliant) – Provides Steerable PCI Interrupts for PCI Device Plug-and-Play – Enhanced DMA Controller –...

  • Page 26

    1 Hardware Overview 1.2 System Unit Block Diagram q KBC/EC (Keyboard Controller/Embedded Controller) One M306K9FCLRP chip functions as both KBC and EC. KBC has the following functions: – Scan controller to check status of keyboard matrix – Interface controller between the keyboard scan controller and the system EC has the following functions: –...

  • Page 27

    1.2 System Unit Block Diagram 1 Hardware Overview q Clock Generator One ICS951104 is used. This device generates the system clock. Satellite A20 Maintenance Manual (960-444) 1-13...

  • Page 28: Inch Hard Disk Drive

    2.5-inch magnetic disk and mini-Winchester type magnetic heads. The computer supports a 30GB, 40GB, 60GB or 80GB HDD. The HDD is shown in figure 1-4. The specifications are listed in table 1-1. Figure 1-4 2.5-inch HDD Table 1-1 2.5-inch HDD specifications (1/3) Parameter Specifications TOSHIBA TOSHIBA TOSHIBA TOSHIBA TOSHIBA HDD2181B HDD2182B...

  • Page 29: Hardware Overview

    63.0 70.0 Average random seek time (read) (ms) Average random seek time (write) (ms) Motor start up time (ms) Table 1-1 2.5-inch HDD specifications (3/3) Parameter Specifications TOSHIBA HITACHI HDD2188B G8BC0000Z810 Storage size (formatted) Speed (RPM) 4200 4200 Data transfer speed (Mbits/s)

  • Page 30: Cd-rw/dvd Drive

    1 Hardware Overview 1.4 CD-RW/DVD Drive CD-RW/DVD Drive A full-size, CD-RW/DVD- ROM drive module lets you run CD/DVDs without using an adaptor. It reads DVD-ROMs at maximum 8 speed and CD-ROMs at maximum 24 speed. It writes CD-R at up to 24 speed and CD-RW at up to 10 speed. A Mode Control button turns power to the fixed CD-RW/DVD-ROM drive on and off so you can use the drive as a stand- alone audio CD player.

  • Page 31

    1.4 CD-RW/DVD Drive 1 Hardware Overview Table 1-2 CD-RW/DVD drive specifications (1/4) Specifications Item TEAC G8CC0000Q410 Transfer rate Read (CD-ROM) 1,545 to 3,600 KB/sec. Read (DVD-ROM) 4,469 to 10,816 KB/sec. Write (CD-R) Write (CD-RW) Average CD-ROM access time DVD-ROM (msec.) Data Buffer Capacity Supported Formats CD-DA, CD-ROM Mode1, Mode2, CD-ROM XA...

  • Page 32

    Enhanced CD (CD-EXTRA), (CD-EXTRA), CD-G (Audio CD only), CD-G (Audio CD Addressing Method 2 only), Addressing Method 2 Table 1-2 CD-RW/DVD drive specifications (4/4) TOSHIBA SD-R2212 Item DVD-ROM mode CD-ROM mode CD-R/CD-RW (Write) ATAPI Burst (Mbytes/s) 33.3 (Ultra DMA mode 2) 16.6 (PIO Mode 4, Multi-word DMA mode 2)

  • Page 33: Dvd-r/-rw Drive

    R/-RW drive is shown in figure 1-6. Specifications for the DVD-R/-RW drive are described in table 1-3. Figure 1-6 DVD-R/-RW drive Table 1-3 DVD-R/-RW drive specifications Item Specifications TOSHIBA G8CC0000ZD10 DVD-ROM CD-ROM DVD-RAM (Write) Transfer rate (Kbytes/s) 33.3 (Ultra DMA) 16.7 (PIO mode 4, Multiple word DMA transfer mode 2)

  • Page 34: Dvd Multi Drive

    1 Hardware Overview 1.6 DVD Multi Drive DVD Multi Drive A full-size, DVD Multi drive module lets you run either 12 cm (4.72") or 8 cm (3.15") CD/DVDs without using an adaptor. It reads DVD-ROMs at maximum 8 speed and CD- ROMs at maximum 24 speed.

  • Page 35

    1.6 DVD Multi Drive 1 Hardware Overview Table 1-4 DVD-Multi drive specifications (2/2) Item Panasonic G8CC00012410 DVD-ROM mode CD-ROM mode CD-R/CD-RW (Write) ATAPI Burst (Mbytes/s) 33.3 (Ultra DMA mode 2) 16.6 (PIO Mode 4, Multi-word DMA mode 2) Access time (ms) 1/3 Stroke Access (typ.) Data Buffer Capacity (Mbytes) Supported Formats...

  • Page 37: Keyboard

    1.7 Keyboard 1 Hardware Overview Keyboard The keyboard is mounted 85(US)/86(UK) keys that consist of character key and control key, and in conformity with JIS. The keyboard is connected to membrane connector on the system board and controlled by the keyboard controller. Figure1-8 is a view of the keyboard.

  • Page 38: Tft Color Display

    1 Hardware Overview 1.8 TFT Color Display TFT Color Display The TFT color display consists of 14.1/15.0- inch XGA/SXGA+ LCD module and FL inverter board. 1.8.1 LCD Module The LCD module used for the TFT color display uses a backlight as the light source and can display a maximum of 262,144 colors with 1,024 x 768 or 1,400 x 1,050 resolution.

  • Page 39: Fl Inverter Board

    1.8 TFT Color Display 1 Hardware Overview Table 1-5 LCD module specifications (14.1-inch XGA TFT) (1/3) Item Specifications G33C0000 G33C0000 G33C0000 G33C0000 VF2058 VF2062 L110 G110 M110 Q110 Number of Dots 1,024 (W) x 768 (H) Dot spacing (mm) 0.297 (H) x 0.297 (V) Display range (mm) 304.128 (H) x 228.096 (V) Table 1-5 LCD module specifications (15.0-inch XGA TFT) (2/3)

  • Page 40: Power Supply

    1 Hardware Overview 1.9 Power Supply Power Supply The power supply distributes many different voltages to the system board and performs the following functions: 1. Input port management AC adaptor connection Battery pack installation The voltage of AC adaptor (both IN and OUT) 2.

  • Page 41

    1.9 Power Supply 1 Hardware Overview The power supply output rating is specified in table 1-7. Table 1-7 Power supply board output rating Power supplied Yes/No Voltage Name Stand by Power off No battery CPU,M1672 1.55-1.25 VID1R2- M1672,Memory 2R5-B2V M1535+,Clock Generator 2R5-P2V Memory 1R25-B1V...

  • Page 42: Batteries

    1 Hardware Overview 1.10 Batteries 1.10 Batteries The computer has two types of batteries: q Main battery pack q RTC battery The battery specifications are listed in table 1-8. Table 1-8 Battery specifications Battery name Material Output voltage Capacity Main battery Lithium-Ion 10.8 V 8,400 mAh...

  • Page 43

    1.10 Batteries 1 Hardware Overview 1.10.3 Battery Charging Control Battery charging is controlled by a power supply microprocessor mounted on the system board. The power supply microprocessor controls whether the charge is on or off and detects a full charge when the AC adaptor and battery are attached to the computer. The system charges the battery using quick charge or trickle charge.

  • Page 44

    1 Hardware Overview 1.10 Batteries 1.10.4 RTC battery The RTC battery provides power to keep the current date, time and other setup information in memory while the computer is turned off. Table 1-10 lists the charging time and data preservation period of the RTC battery. The adapter or main battery charges the RTC battery, while the computer is powered on.

  • Page 45

    Chapter 2 Troubleshooting Procedures...

  • Page 46

    2 Troubleshooting Procedures 2-ii Satellite A20 Maintenance Manual (960-444)

  • Page 47

    2 Troubleshooting Procedures Chapter 2 Contents Troubleshooting ......................2-1 Troubleshooting Flowchart................... 2-3 Power Supply Troubleshooting..................2-7 Procedure 1 Power Status Check ..............2-7 Procedure 2 Error Code Check ................. 2-9 Procedure 3 Connection Check ............... 2-16 Procedure 4 Quick Charge Check ..............2-17 Procedure 5 Replacement Check..............

  • Page 48

    2 Troubleshooting Procedures Display Troubleshooting..................... 2-44 Procedure 1 External Monitor Check............... 2-44 Procedure 2 Diagnostic Test Program Execution Check........2-44 Procedure 3 Connector and Replacement Check..........2-45 CD-RW/DVD, DVD-ROM, DVD-R/RW and DVD Multi Drive Troubleshooting..............2-46 Procedure 1 Drive Cleaning Check ..............2-46 Procedure 2 Diagnostic Test Program Execution Check........

  • Page 49

    2 Troubleshooting Procedures Figures Figure 2-1 Troubleshooting flowchart ..................2-4 Figure 2-2 Printer port LED....................2-22 Figure 2-3 Antenna test jig ....................2-54 Tables Table 2-1 Battery LED ......................2-7 Table 2-2 DC IN LED......................2-8 Table 2-3 Printer port LED boot mode status ............... 2-23 Table 2-4 FDD error code and status ...................

  • Page 50: Troubleshooting

    2 Troubleshooting Procedures 2-vi Satellite A20 Maintenance Manual (960-444)

  • Page 51

    14. Multimedia sound system with line- in and line-out ports 15. Headphone 16. Microphone 17. USB test module and USB cable 18. TOSHIBA CD-ROM TEST DISK (ZA1217P01/P000204190) 19. DVD-ROM TSD-1 (TOSHIBA EMI DVD Test Media) Satellite A20 Maintenance Manual (960-444)

  • Page 52

    2 Troubleshooting Procedures 2.1 Troubleshooting 20. CD-RW media that supports four-speed writing and is formatted with DirectCD (media manufactured by RICOH or Mitsubishi Chemical are recommended). 21. RJ11 connector checker and modular cable or RJ11 connector checker LED 22. LAN wraparound connector 23.

  • Page 53: Troubleshooting Flowchart

    The computer will override the password function by erasing the current password. q Verify with the customer that Toshiba Windows XP Pro/Home is installed on the hard disk. Operating systems that were not preinstalled by Toshiba can cause the computer to malfunction.

  • Page 54

    2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart Figure 2-1 Troubleshooting flowchart (1/2) Satellite A20 Maintenance Manual (960-444)

  • Page 55

    2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures Figure 2-1 Troubleshooting flowchart (2/2) Satellite A20 Maintenance Manual (960-444)

  • Page 56

    2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart If the diagnostics program cannot detect an error, the problem may be intermittent. The Running Test program should be executed several times to isolate the problem. Check the Log Utilities function to confirm which diagnostic test detected an error, then perform the appropriate troubleshooting procedures as follows: 1.

  • Page 57: Power Supply Troubleshooting

    2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures Power Supply Troubleshooting The power supply controls many functions and components. To determine if the power supply is functioning properly, start with Procedure 1 and continue with the other Procedures as instructed. The procedures described in this section are: Procedure 1: Power Status Check Procedure 2: Error Code Check Procedure 3: Connection Check...

  • Page 58

    2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Table 2-2 DC IN LED DC IN LED Power supply status Lights green DC power is being supplied from the AC adaptor. Power supply malfunction *3 Blinks orange Doesn’t light Any condition other than those above *3 When the power supply controller detects a malfunction, the DC IN LED blinks and an error code is displayed.

  • Page 59

    2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures Procedure 2 Error Code Check If the power supply microprocessor detects a malfunction, the DC IN LED blinks orange. The blink pattern indicates an error as shown below. q Start Off for 2 seconds q Error code (8 bit) “1”...

  • Page 60

    2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Check 1 Convert the DC IN LED blink pattern into the hexadecimal error code and compare it to the tables below. The error code begins with the least significant digit. Error code Error code Where Error occurs DC-IN AC Adaptor is not connected.

  • Page 61

    2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures q DC IN Error code Meaning AC Adaptor output voltage is over 16.5V. Common Dock output voltage is over 16.5V. Current from the DC power supply is over 13.2A. Current from the DC power supply is over 0.5A when there is no load. Current sensing IC is not normal.

  • Page 62

    2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting q E5V output Error code Meaning E5V voltage is over 6.00V when the computer is powered on/off. E5V voltage is 4.50V or less when the computer is powered on. E5V voltage is 4.50V or less when the computer is booting up. E5V voltage is abnormal when the computer is suspended.

  • Page 63

    2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures q EMV output Error code Meaning EMV voltage is over 3.00V when the computer is powered on/off. EMV voltage is 1.53V or less when the computer is powered on. EMV voltage is 1.53V or less when the computer is booting up. EMV voltage is 1.53V or more when the computer is powered off.

  • Page 64

    2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting q PPV output Error code Meaning PPV voltage is over 1.92V when the computer is powered on or off. PPV voltage is 1.04V or less when the computer is powered on. PPV voltage is 1.04V or less when the computer is booting up. PPV voltage is 1.04V or more when the computer is powered off.

  • Page 65

    2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures Check 2 In the case of error code 10h or 12h: q Make sure the AC adaptor cord and AC power cord are firmly plugged into the DC IN 15 V socket and wall outlet. If the cables are connected correctly, go to the following step: q Connect a new AC adaptor and/or AC power cord, if necessary.

  • Page 66

    2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Procedure 3 Connection Check The power supply wiring diagram is shown below: AC adapter cord System board adapter AC power cord Battery pack Any of the connectors may be disconnected. Perform Check 1. Check 1 Disconnect the AC power cord from wall outlet.

  • Page 67

    2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures Procedure 4 Quick Charge Check The power supply may not charge the battery pack. Perform the following procedures: 1. Reinstall the battery pack. 2. Attach the AC adaptor and turn on the power. If you cannot turn on the power, go to Procedure 5.

  • Page 68

    2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting Procedure 5 Replacement Check The system board or the battery board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures. Check the connection between the AC adaptor and the system board and connection between the system board and the battery board.

  • Page 69: System Board Troubleshooting

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures System Board Troubleshooting This section describes how to determine if the system board is defective or not functioning properly. Start with Procedure 1 and continue with the other procedures as instructed. The procedures described in this section are: Procedure 1: Message Check Procedure 2: Printer Port LED Check on Boot Mode Procedure 3: Diagnostic Test Program Execution Check...

  • Page 70

    If an error message is shown on the display, perform Check 1. q If there is no error message, go to Procedure 2. q If Toshiba MS-DOS or Toshiba Windows XP Pro/Home is properly loaded, go to Procedure 3.

  • Page 71

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures Check 2 The IRT checks the system board. When the IRT detects an error, the system stops or an error message appears. If one of the following error messages (1) through (17), (24) or (25) appears, go to Procedure 4.

  • Page 72

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting Procedure 2 Printer Port LED Check on Boot Mode The printer port LED displays the IRT status and test status by turning lights on and off as an eight-digit binary value for boot mode. Figure 2-2 shows the printer port LED. Figure 2-2 Printer port LED To use the printer port LED, follow the steps below: 1.

  • Page 73: Sound Troubleshooting, Troubleshooting Procedures

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LED boot mode status (1/8) LED Status Test item Message Register initialization for boot block Start Clearing software reset bit Permitting A20 line Initialization of special register and Intel chip set Flash ROM check PIT CH0 initialization (for HOLD ON) BIOS rewrite flag initialization...

  • Page 74

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LED boot mode status (2/8) LED Status Test item Message (B3h) DRAM configuration Enable L1 cache Memory clear Transition to real mode, coping BIOS on RAM Display initialization Storing key scan code Setting TASK_1ms_TSC Display initialization Second controller...

  • Page 75

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LED boot mode status (3/8) LED Status Test item Message IRT Check system Initialization of special register PIT CH1 initialization size (Setting refresh interval to 30 m/s) Memory check Check of the type and size of DRAM (at Cold Boot) The system halts when the DRAM size is zero.

  • Page 76

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LED boot mode status (4/8) LED Status Test item Message (03h) Setting resume error request System BIOS ROM to RAM copy (The system halts when an error is detected.) SMRAM initialization SMRAM initialization Check of Wake Up factor SMRAM base rewrite and BIOS CPU state map...

  • Page 77

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LED boot mode status (5/8) LED Status Test item Message PCI initialization Storing memory configuration In buffer Reading EC version Update of flash ROM type Destination (home/abroad) reference by DMI data Default setting when CMOS default setting error (Bad Battery, Bad Checksum (ROM, CMOS) is detected)

  • Page 78

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LED boot mode status (6/8) LED Status Test item Message PnP Hardware initialization Running a task for waiting the completion of PnP resource creating Serial interrupt control (before executing interrupt) PnP Hardware initialization PC card slot initialization FIR initialization...

  • Page 79

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures Table 2-3 Printer port LED boot mode status (7/8) LED Status Test item Message System memory initialization Initialization of conventional memory (Reboot) * LED=14h when an error is detected in check of exceptional cases in protected mode DMA Page Register check DMA Page Register check (Boot)

  • Page 80

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting Table 2-3 Printer port LED boot mode status (8/8) LED Status Test item Message (1Ch) Waiting for the completion of the clock generator setting (The system halts in LED=1Dh when an error is detected.) Waiting for the completion of Serial Port initialization Releasing NMI mask...

  • Page 81

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures Check 1 If any of the following error codes display, go to Procedure 4. B0h, B1h, B2h, B3h, B7h, B8h, 00h, 01h, 02h, 03h, 04h, 06h, 07h, 05h, D0h, D1h, D2h, D3h, D4h, D5h, 70h, 74h, 75h, 71h, 72h, 73h, 76h, 77h, 81h, 82h, 83h, 78h, 79h, 08h, 09h, 0Ah, 0Dh, 18h, 19h, 1Fh, 20h, 25h, 30h, 40h, 41h, 22h, 42h, 80h, 83h, C0h, C1h, A6h Check 2...

  • Page 82

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting 16. IEEE1394 test 17. Bluetooth test If an error is detected during these tests, go to Procedure 4. Procedure 4 Replacement Check The system board connectors may be damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform Check 1.

  • Page 83: Fdd Troubleshooting

    2.5 FDD Troubleshooting 2 Troubleshooting Procedures FDD Troubleshooting This section describes how to determine if the USB FDD is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required. Procedure 1: FDD Head Cleaning Check Procedure 2: Diagnostic Test Program Execution Check Procedure 3: Connector Check and Replacement Check Procedure 1...

  • Page 84

    2 Troubleshooting Procedures 2.5 FDD Troubleshooting Procedure 2 Diagnostic Test Program Execution Check Insert the Diagnostics Disk in the USB FDD, turn on the computer and run the test. Refer to Chapter 3, Tests and Diagnostics, for more info rmation about the diagnostics test procedures. Floppy disk drive test error codes and their status names are listed in Table 2-4.

  • Page 85

    2.5 FDD Troubleshooting 2 Troubleshooting Procedures Procedure 3 Connector Check and Replacement Check The 3.5- inch USB FDD is connected to the system board. Check 1 Make sure the USB FDD cable is firmly connected to PJ4600 on system board. If any of the connections is loose, reconnect firmly and repeat Procedure 2.

  • Page 86: Hdd Troubleshooting

    2 Troubleshooting Procedures 2.6 HDD Troubleshooting HDD Troubleshooting This section describes how to determine if the HDD is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required. Procedure 1: Message Check Procedure 2: Partition Check Procedure 3: Format Check Procedure 4: Diagnostic Test Program Execution Check...

  • Page 87

    2 Troubleshooting Procedures Procedure 2 Partition Check Insert the Toshiba MS-DOS system disk and restart the computer. Perform the following checks: Type C: and press Enter. If you cannot change to the drive C, go to Check 2. If you Check 1 can change to drive C, go to Check 3.

  • Page 88

    2 Troubleshooting Procedures 2.6 HDD Troubleshooting Procedure 3 Format Check The computer’s HDD is formatted using the MS-DOS FORMAT program. To format the HDD, follow the steps below. Check 1 Format the HDD and transfer system files using FORMAT C:/S/U. If the following message appears on the display, the HDD is formatted.

  • Page 89

    2.6 HDD Troubleshooting 2 Troubleshooting Procedures Procedure 4 Diagnostic Test Program Execution Check The HDD test program is stored in the diagnostics disk. Perform all of the HDD tests in the Hard Disk Drive Test. Refer to Chapter 3, Tests and Diagnostics, for more information about the HDD test program.

  • Page 90

    2 Troubleshooting Procedures 2.6 HDD Troubleshooting Procedure 5 Connector Check and Replacement Check The HDD or the system board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks: Check 1 Make sure the HDD is firmly connected to PJ1800 on the system board.

  • Page 91: Keyboard Troubleshooting

    2.7 Keyboard Troubleshooting 2 Troubleshooting Procedures Keyboard Troubleshooting To determine if the computer’s keyboard or touch pad is functioning properly, perform the following procedures. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: Diagnostic Test Program Execution Check Procedure 2: Connector and Replacement Check Procedure 1 Diagnostic Test Program Execution Check...

  • Page 92

    2 Troubleshooting Procedures 2.7 Keyboard Troubleshooting Procedure 2 Connector and Replacement Check The keyboard, touch pad or system board may be disconnected or damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks. If the touch pad malfunctions, start with Check 3. If the keyboard malfunctions, start with Check 1.

  • Page 93: Display Troubleshooting

    2.8 Display Troubleshooting 2 Troubleshooting Procedures Display Troubleshooting This section describes how to determine if the computer’s display is functioning properly. Start with Procedure 1 and continue with the other procedures as instructed. Procedure 1: External Monitor Check Procedure 2: Diagnostic Test Program Execution Check Procedure 3: Connector and Replacement Check Procedure 1 External Monitor Check...

  • Page 94

    2 Troubleshooting Procedures 2.8 Display Troubleshooting Procedure 3 Connector and Replacement Check The FL, FL inverter, LCD module, and system board are connected to the display circuits. Any of these components may be damaged. Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble the computer and then perform the following checks: If the FL does not light, perform Check 1.

  • Page 95: And Dvd Multi Drive Troubleshooting

    Diagnostic Test Program Execution Check The CD-ROM/DVD-ROM test program is stored in the Diagnostics Disk. For the DVD-ROM test, prepare a test DVD (TOSHIBA-EMI DVD-ROM Test Media TSD-1). For the CD-RW test, use CD-RW media that supports four-speed writing (media manufactured by RICOH or Mitsubishi Chemical are recommended).

  • Page 96

    2 Troubleshooting Procedures 2.9 DVD-ROM and CD-RW/DVD-ROM Troubleshooting Procedure 3 Connector Check and Replacement Check The CD-RW/DVD, DVD-ROM, DVD-R/-RW or DVD Multi drive connects to PJ1820 on the system board. The drive may be disconnected, or the drive or system board may be damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks: Check 1...

  • Page 97: Modem Troubleshooting

    2.10 Modem Troubleshooting 2 Troubleshooting Procedures 2.10 Modem Troubleshooting This section describes how to determine if the computer's modem is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required. Procedure 1: Diagnostic Test Program Execution Check Procedure 2: Connector Check and Replacement Check Procedure 1 Diagnostic Test Program Execution Check...

  • Page 98

    2 Troubleshooting Procedures 2.10 Modem Troubleshooting Procedure 2 Connector Check and Replacement Check The Modem is installed as a modem daughter card (MDC). If the modem malfunctions, there may be a bad connection between the MDC and the sound board, or the sound board and the system board.

  • Page 99: Lan Troubleshooting

    2.11 LAN Troubleshooting 2 Troubleshooting Procedures 2.11 LAN Troubleshooting This section describes how to determine if the computer's LAN port is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedure as required. Procedure 1: Diagnostic Test Program Execution Check Procedure 2: Connector Check and Replacement Check Procedure 1 Diagnostic Test Program Execution Check...

  • Page 100

    2 Troubleshooting Procedures 2.11 LAN Troubleshooting Procedure 2 Connector Check and Replacement Check If the LAN port malfunctions, there may be a bad connection between the RJ-45 jack and the system board. Or the system board may be damaged. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks: Check 1 Make sure the RJ-45 jack cable is firmly connected to PJ4100 on system board.

  • Page 101: Wireless Lan Troubleshooting

    2.11 LAN Troubleshooting 2 Troubleshooting Procedures 2.12 Wireless LAN Troubleshooting This section describes how to determine if the computer’s wireless LAN is functioning properly. Perform the steps below starting with Procedure 1 and continuing with other procedures as required. Procedure 1: Transmitting- Receiving Check Procedure 2: Antennas' Connection Check Procedure 3: Antennas' Capability Check Procedure 4: Replacement Check...

  • Page 102

    2 Troubleshooting Procedures 2.11 LAN Troubleshooting Procedure 2 Antennas' Connection Check The wireless LAN function wiring diagram is shown below: Any of the connections may be disconnected. Disassemble the computer following the steps described in Chapter 4, perform the following checks: Check 1 The wireless LAN card and the system board may be disconnected.

  • Page 103

    2.11 LAN Troubleshooting 2 Troubleshooting Procedures Procedure 3 Antenna Check Use an antenna test cable to check the antennas' connection. Follow the steps below. Any of the connections may be disconnected. Disassemble the computer following the steps described in Chapter 4, perform the following checks. 1.

  • Page 104

    2 Troubleshooting Procedures 2.11 LAN Troubleshooting Procedure 4 Replacement Check Check if the wireless LAN card and the system board are connected properly. Any of these components may be damaged. Disassemble the computer following the steps described in Chapter 4 and replace the board with a new one. Check 1 The wireless LAN board may be defective or damaged.

  • Page 105: Sound Troubleshooting

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures 2.13 Sound Troubleshooting This section describes how to determine if the computer's sound functions are functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required. Procedure 1: Diagnostic Test Program Execution Check Procedure 2: Connector Check Procedure 3: Replacement Check Procedure 1...

  • Page 106

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting Procedure 2 Connector Check The sound function wiring diagram is shown below: Any of the connections may be disconnected. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks: If the speakers don't work correctly, perform Check 1.

  • Page 107

    2.12 Sound Troubleshooting 2 Troubleshooting Procedures Procedure 3 Replacement Check Check 1 If the speakers don't sound properly, the left or right speaker may be defective or damaged. Replace it with a new one. If the stereo speakers still do not work properly, go to Check 3.

  • Page 108: Sd Card Slot Troubleshooting

    2 Troubleshooting Procedures 2.12 Sound Troubleshooting 2.14 SD Card Slot Troubleshooting This section describes how to determine if the computer’s SD card slot is functioning properly. Perform the steps below starting with Procedure 1 and continuing with the other procedures as required.

  • Page 109

    Chapter 3 Tests and Diagnostics...

  • Page 110

    3 Tests and Diagnostics 3-ii Satellite A20 Maintenance Manual (960-444)

  • Page 111: Table Of Contents

    3 Tests and Diagnostics Chapter 3 Contents The Diagnostic Test...................... 3-1 Executing the Diagnostic Test ..................3-3 Subtest Names......................3-7 System Test......................... 3-9 Memory Test......................3-12 Keyboard Test......................3-14 Display Test....................... 3-18 Floppy Disk Test ....................... 3-22 Printer Test........................ 3-24 3.10 Async Test.........................

  • Page 112

    3 Tests and Diagnostics 3.23.2 Operations ................... 3-59 3.24 Floppy Disk Drive Utilities..................3-61 3.24.1 Function Description................3-61 3.24.2 Operations ................... 3-62 3.25 System Configuration....................3-66 3.25.1 Function Description................3-66 3.25.2 Operations ................... 3-67 3.26 SETUP........................3-68 3.26.1 Function Description................3-68 3.26.2 Accessing the SETUP Program.............

  • Page 113: The Diagnostic Test

    3.1 The Diagnostic Test 3 Tests and Diagnostics The Diagnostic Test This chapter explains how to use the Diagnostic Test program to test the functions of the computer’s hardware modules. The Diagnostic Test Program is stored on the Diagnostic Disk. The Diagnostic Test program consists of eight programs that are grouped into the Service Program Module (DIAGNOSTIC TEST MENU).

  • Page 114

    3 Tests and Diagnostics 3.1 The Diagnostic Test q SOUND/LAN/MODEM TEST q IEEE1394 TEST q BLUETOOTH TEST Satellite A20 Maintenance Manual (960-444)

  • Page 115

    A printer wraparound connector for the printer wraparound test (Printer test) q A CD test media (TOSHIBA CD-ROM TEST DISK ZA1217P01/P000204190) (CD-ROM/DVD-ROM test) q A DVD test media (Toshiba-EMI DVD-ROM TEST DISK TSD-1) (CD-ROM/DVD- ROM test) q CD-RW media that supports four-speed writing (media manufactured by RICOH or Mitsubishi Chemical are recommended.)

  • Page 116: Executing The Diagnostic Test

    3.2 Executing the Diagnostic Test Executing the Diagnostic Test Toshiba MS-DOS is required to run the DIAGNOSTICS TEST PROGRAM. To start the DIAGNOSTIC TEST PROGRAM, follow these steps: 1. Insert the Diagnostics disk in the floppy disk drive and turn on the computer while pressing (The Diagnostics Disk contains the MS-DOS boot files.)

  • Page 117

    2. To execute the DIAGNOSTIC TEST MENU from the DIAGNOSTICS MENU, set the highlight bar to 1, and press Enter. The following DIAGNOSTIC TEST MENU will appear: TOSHIBA Personal Computer XXXX DIAGNOSTICS Version XXX (c) Copyright TOSHIBA Corp. XXXX DIAGNOSTIC TEST MENU : 1 - SYSTEM TEST 2 - MEMORY TEST...

  • Page 118

    3 Tests and Diagnostics 3.2 Executing the Diagnostic Test 3. Select the option you want to execute and press Enter. When “1-SYSTEM TEST” is selected, the following message will appear: SYSTEM TEST XXXXXXX XXXX DIAGNOSTIC TEST VX.XX [Ctrl]+[Break] : test end [Ctrl]+[C] : key stop SUB-TEST...

  • Page 119

    3.2 Executing the Diagnostic Test 3 Tests and Diagnostics 5. The following message will appear: ERROR STOP : YES/NO Then, use the left or right arrow keys to move the cursor to the desired option and press Enter. Selecting YES stops the test program when an error is found and displays the operation guide on the right side of the display screen as shown below: ERROR STATUS NAME [[ HALT OPERATION ]]...

  • Page 120: Subtest Names

    3 Tests and Diagnostics 3.3 Subtest Names Subtest Names Table 3-1 lists the subtest names for each test program in the DIAGNOSTIC TEST MENU. Table 3-1 Subtest names (1/2) Test Name Subtest No. Subtest Name SYSTEM ROM checksum Thermister Check CPU Fan ON/OFF 2nd Fan ON/OFF Quick charge...

  • Page 121

    3.3 Subtest Names 3 Tests and Diagnostics Table 3-1 Subtest names (2/2) Test Name Subtest No. Subtest Name FIR/SIR Point to point (send) ASYNC FIR/SIR Point to point (receive) HARD DISK Sequential read Address uniqueness Random address/data Cross talk & peak shift Write specified address Read specified address Sequential write...

  • Page 122: System Test

    3 Tests and Diagnostics 3.4 System Test System Test To execute the System Test select 1 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. Move the highlight bar to the subtest you want to execute and press Enter.

  • Page 123

    3.4 System Test 3 Tests and Diagnostics Subtest 07 DMI read Reads the factory setting for the serial and DMI numbers. Model Name : XXXXXX Version Number : XXXXXX-XXXXX Serial Number : XXXXXXXXXX Model Number : XXXXXX-XXXXX PCN/BND Number : XXXXXXXXXXXXXXXXXXXX UUID Number : XXXXXXXXXXXXXXXXXXXXXXXXX To exit this subtest and return to the SYSTEM TEST menu, press Enter.

  • Page 124

    3 Tests and Diagnostics 3.4 System Test This subtest measures the CPU temperature to see if the cooling functions of the computer are effectively working. When the subtest starts, the following message appears on the display: CPU TEMP = XX deg C Throttling level = XXXXh The number of the CPU TEMP indicates the CPU temperature at the moment in decimal notation.

  • Page 125: Memory Test

    3.5 Memory Test 3 Tests and Diagnostics Memory Test To execute the Memory Test, select 2 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. Move the highlight bar to the subtest you want to execute and press Enter.

  • Page 126

    3 Tests and Diagnostics 3.5 Memory Test Subtest 04 Cache Memory To test the cache memory, a pass-through write-read comparison of ‘5A’ data is run repeatedly to the test area (‘7000’:‘Program’ size to ‘7000’:‘7FFF’ (32 KB)) to check the hit-miss ratio (on/off status) for CPU cache memory. One test takes 3 seconds.

  • Page 127: Keyboard Test

    3.6 Keyboard Test 3 Tests and Diagnostics Keyboard Test To execute the Keyboard Test, select 3 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. Move the highlight bar to the subtest you want to execute and press Enter.

  • Page 128

    3 Tests and Diagnostics 3.6 Keyboard Test Subtest 02 Pressed Key Code Display When a key is pressed, the scan code, character code, and key top name are displayed on the screen in the format shown below. The Ins, Caps Lock, Num Lock, Scroll Lock, Alt, Ctrl, Left Shift, and Right Shift keys are displayed in reverse screen mode when pressed.

  • Page 129

    3.6 Keyboard Test 3 Tests and Diagnostics *** IPS (PAD) TEST (Vx.xx) *** <POINTING> <POINTING> <PARAMETER> STATUS:0000h X-RATE:0000h Y-RATE:0000H <BUTTON> << PRESS BUTTON1+BUTTON2 THEN END >> *** IPS (4-Btton) TEST (Vx.xx) *** < POINTING > <PARAMETER> STATUS:0018h X-RATE:00FFh Y-RATE:0001H <BUTTON> <<...

  • Page 130

    3 Tests and Diagnostics 3.6 Keyboard Test If the test ends successfully, OK is displayed. If nothing is displayed, there may be a problem with the USB port. Check the wraparound connection and repeat the test. To check only the USB mouse, follow the procedures below: Connect the USB mouse to the computer’s USB connector.

  • Page 131: Display Test

    3.7 Display Test 3 Tests and Diagnostics Display Test To execute the Display Test, select 4 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The Display test contains seven subtests that test the display in various modes.

  • Page 132

    3 Tests and Diagnostics 3.7 Display Test Subtest 04 Gradation & Mode test for VGA This subtest displays gradations for each mode. Execute the test, then press Enter to change the mode. The display below appears on the screen when this subtest is executed. Pressing Enter changes the size of the displayed image.

  • Page 133

    3.7 Display Test 3 Tests and Diagnostics Pressing Enter changes the size of the displayed image. Pressing Enter changes the size of the displayed image in the following order: Mode 111 640*480 Mode 112 640*480 Mode 114 800*600 Mode 115 800*600 Mode 117 1024*768...

  • Page 134

    3 Tests and Diagnostics 3.7 Display Test Subtest 06 “H” Pattern Display This subtest displays a full screen of “H” patterns. HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH To exit this subtest and return to the DISPLAY TEST menu, Ctrl + Break. NOTE: The last row may not be completely filled.

  • Page 135: Floppy Disk Test

    3.8 Floppy Disk Test 3 Tests and Diagnostics Floppy Disk Test NOTE: Before running the floppy disk test, prepare a formatted work disk. Remove the Diagnostics Disk and insert the work disk into the FDD. Otherwise, the contents of the floppy disk will be erased.

  • Page 136

    3 Tests and Diagnostics 3.8 Floppy Disk Test Subtest 01 Sequential read This subtest performs a Cyclic Redundancy Check (CRC) that continuously reads all the tracks (track: 0 to 39/0 to 79) on a floppy disk. The start track is specified at the start of the FDD test. Refer to 1. in this section. Subtest 02 Sequential read/write This subtest continuously writes data pattern B5ADADh to all the tracks (track: 0...

  • Page 137: Printer Test

    3.9 Printer Test 3 Tests and Diagnostics Printer Test To execute the Printer Test, select 6 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The Printer Test contains three subtests that test the output of the printer connected to the computer.

  • Page 138

    3 Tests and Diagnostics 3.9 Printer Test Subtest 02 Function This subtest is for IBM compatible printers, and tests the following functions: Normal print Double-width print Compressed print Emphasized print Double-strike print All characters print This subtest prints the various print types shown below: Subtest 03 Wrap around NOTE: To execute this subtest, a printer wraparound connector must be...

  • Page 139: Async Test

    3.10 Async Test 3 Tests and Diagnostics 3.10 Async Test To execute the Async Test, select 7 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions displayed on the screen. The Async test contains two subtests that test the asynchronous communication functions.

  • Page 140: Hard Disk Test

    3 Tests and Diagnostics 3.9 Async Test 3.11 Hard Disk Test To execute the Hard Disk Test, select 8 from the DIAGNOSTIC TEST MENU, press Enter, and follow the directions on the screen. The hard disk test contains ten subtests that test the hard disk drive functions.

  • Page 141

    3.11 Hard Disk Test 3 Tests and Diagnostics 5. The Hard Disk Test message will appear after you respond to the Detail Status prompt. Select the number of the subtest you want to execute and press Enter. The following message will appear during each subtest. HARD DISK TEST XXXXXXX SUB-TEST...

  • Page 142

    3 Tests and Diagnostics 3.9 Async Test Subtest 04 Cross Talk & Peak Shift This subtest writes eight types of worst pattern data (listed below) to a cylinder, then reads the data while moving from cylinder to cylinder. Worst pattern data Cylinder ‘B5ADAD’...

  • Page 143: Real Timer Test

    3.12 Real Timer Test 3 Tests and Diagnostics 3.12 Real Timer Test To execute the Real Timer Test, select 9 from the DIAGNOSTIC TEST MENU, press Enter and follow the directions on the screen. The real timer test contains three Subtests that test the computer’s real timer functions.

  • Page 144

    3 Tests and Diagnostics 3.9 Async Test Subtest 03 Real Time Carry CAUTION: When you execute this Subtest, the current date and time are erased. This Subtest checks the real time clock increments, making sure the date and time are displayed in the following format: Current date : 12-31-2001 Current time : 23:59:58 PRESS [Enter] KEY TO EXIT TEST...

  • Page 145: Ndp Test

    3.13 NDP Test 3 Tests and Diagnostics 3.13 NDP Test To execute the NDP test, select 10 from the DIAGNOSTICS TEST MENU, press Enter and follow the directions on the screen. The NDP test contains one Subtest that tests the computer’s NDP functions.

  • Page 146: Expansion Test

    3 Tests and Diagnostics 3.14 Expansion Test 3.14 Expansion Test To execute the expansion test, select 11 from the DIAGNOSTICS TEST MENU, press Enter and follow the directions on the screen. The expansion test contains two subtests. NOTE: To execute this subtest, the PC card wraparound connector is required. Subtest 01 PCMCIA Wraparound This test checks the following signal line of the PC card slot:...

  • Page 147

    3.14 Expansion Test 3 Tests and Diagnostics Subtest 03 RGB monitor ID For this test, the computer must be in CRT mode. Connect the CRT (an RGB monitor) with the external monitor port. Satellite A20 Maintenance Manual (960-444) 3-35...

  • Page 148

    Subtest 04 Playback Music (CD only) NOTE: You cannot use the Toshiba-EMI DVD-ROM TEST DISK TSD-1 for Subtest 04. For this test, use an ordinary music CD. This Subtest reads track data from a specified track and plays the sound.

  • Page 149

    3.16 Wireless LAN Test (Agere) 3 Tests and Diagnostics 3.16 Wireless LAN Test (Agere) This section describes how to perform the wireless LAN transmitting-receiving test with the test program. Note: Use another computer (with Agere wireless LAN card) that can communicate by the wireless LAN as a reference machine to perform this test.

  • Page 150

    Wireless LAN (WEP64/128) test Transmit & Receive test [Initiator] ************************************************************* ..Press test number [1-2,0] ======== RESPONDER SET ======== ORiWL.EXE Rev.03 Copyright (c) Toshiba Corporation,2000, 2001 Initializing... [[[ Responder Mode ]]] MAC adress : XXXXXXXXXXXX Ad-hoc mode SS ID : PHN Test...

  • Page 151: Tests And Diagnostics

    Wireless LAN (WEP64/128) test Transmit & Receive test [Initiator] ************************************************************* ..Press test number [1-2,0] ======== RESPONDER SET ======== ORiWL.EXE Rev.03 Copyright (c) Toshiba Corporation,2000, 2001 Initializing... [[[ Responder Mode ]]] MAC address : XXXXXXXXXXXX Ad-hoc mode SS ID : PHN Test...

  • Page 152

    Wireless LAN (WEP64/128) test Transmit & Receive test [Initiator] ************************************************************* ..Press test number [1-2,0] ======== RESPONDER SET ======== ORiWL.EXE Rev.03 Copyright (c) Toshiba Corporation,2000, 2001 Initializing... [[[ Responder Mode ]]] MAC address : XXXXXXXXXXXX Ad-hoc mode SS ID : PHN Test...

  • Page 153

    3.16 Wireless LAN Test (Agere) 3 Tests and Diagnostics Subtest 02 Mac Address test This subtest reads MAC Address. If there is no problem, the “OK” message will appear. Subtest 03 Wireless LAN (WEP64/128) test This subtest reads the WEP of the wireless LAN card installed in the target machine. A message similar to the following will appear: ****** This CARD is WEP ****** Press any key to continue...

  • Page 154: Wireless Lan Test (atheros), Wireless Lan Test (atheros)

    3 Tests and Diagnostics 3.17 Wireless LAN Test (Atheros) 3.17 Wireless LAN Test (Atheros) This section describes how to perform the wireless LAN transmitting-receiving test with the test program. Note: Use another computer (with Atheros wireless LAN card) that can communicate by the wireless LAN as a responder machine to perform this test.

  • Page 155: Setting The Responder Machine

    3.17 Wireless LAN Test (Atheros) 3 Tests and Diagnostics Setting the responder machine Note: Release the write-protection of the floppy disk for the test. Insert a floppy disk containing the test program into the FDD for the responder machine and turn on the responder machine.

  • Page 156

    3 Tests and Diagnostics 3.17 Wireless LAN Test (Atheros) To proceed the test, press any key. When the tester machine has passed the test, "OK" message will appear in the tester machine. Press Enter to return to the main menu. When the tester machine has not passed the test, "NG"...

  • Page 157

    Using a headphone at full volume might damage your ears. Toshiba MS-DOS is required to run the DIAGNOSTICS TEST PROGRAM. To start the DIAGNOSTIC TEST PROGRAM, follow these steps: (a) Insert the test program disk in the floppy disk drive and turn on the computer.

  • Page 158

    3 Tests and Diagnostics 3.18 Sound/LAN/Modem Test Subtest 01 Microphoned recording & play This subtest checks the function of the CODEC A/D D/A converter. Both the microphone and headphone terminal can be checked at the same time. Before executing this subtest, connect an external microphone to the computer. IF necessary, connect a headphone to the computer to check whether the headphone jack of the computer is working properly.

  • Page 159

    3.18 Sound/LAN/Modem Test 3 Tests and Diagnostics Copyright (C) 2000 Acer Laboratories Inc. All Rights Reserved. Playback Parameters : Wave File Name = record.wav Wave Channel Index = 1 (d) SPDIF On-Off Option = 0 (d) Play Wave Volume Gain = 15 (d) When "SPDIF"...

  • Page 160

    3 Tests and Diagnostics 3.18 Sound/LAN/Modem Test To execute a subtest continuously, select the test number and press Enter. To exit the Sound/LAN/Modem test, remove the test program disk from the USB FDD and turn the computer off. Subtest 03 LAN Test (a) Select 3 to execute and press Enter.

  • Page 161

    3.18 Sound/LAN/Modem Test 3 Tests and Diagnostics Satellite A20 Maintenance Manual (960-444) 3-49...

  • Page 162

    3 Tests and Diagnostics 3.18 Sound/LAN/Modem Test Subtest 04 Modem Test (a) Select 4 to execute and press Enter. The following message will appear: MDC Test Program [PCB (MDC I/F) Test] for M1535 plus Version X.X * Scorpio Modem Initialize * Digital Loopback * Modem Sound Test :( Operator’s Check!! )

  • Page 163

    USB 2.0 The subtest is executed, the following message appears. ((( USB Test Program for UPD720100GM-8ED System [Ver.2.00] ))) (C) Copyright TOSHIBA Corporation, 2001-2002. All rights reserved. * Read PCI Configuration * HC Initialize * Work Area (Memory) Initialize :OK...

  • Page 164: Error Code And Error Status Names

    3 Tests and Diagnostics 3.19 Error Code and Error Status Names 3.19 Error Code and Error Status Names Table 3-2 lists the error codes and error status names for the Diagnostic Test. Table 3-2 Error codes and error status names (1/3) Device name Error code Error status name...

  • Page 165

    3.19 Error Code and Error Status Names 3 Tests and Diagnostics Table 3-2 Error codes and error status names (2/3) Device name Error code Error status name Bad Command Error Address Mark Not Found Write Protected Record Not Found Media Removed DMA Overrun Error DMA Boundary Error CRC Error...

  • Page 166

    3 Tests and Diagnostics 3.19 Error Code and Error Status Names 3-54 Satellite A20 Maintenance Manual (960-444)

  • Page 167

    3.19 Error Code and Error Status Names 3 Tests and Diagnostics Table 3-2 Error codes and error status names (3/3) Device name Error code Error status name No Co-Processor Control Word Error Status Word Error Bus Error Addition Error Multiply Error Expansion Address Line Error CE#2 Line Error...

  • Page 168: Hard Disk Test Detail Status

    3 Tests and Diagnostics 3.20 Hard Disk Test Detail Status 3.20 Hard Disk Test Detail Status When an error occurs in the hard disk test, the following message is displayed: HDC status = XXXXXXXX Detailed information about the hard disk test error is displayed on the screen by an eight-digit number. The first four digits represent the hard disk controller (HDC) error status number and the last four digits are not used.

  • Page 169

    3.20 Hard Disk Test Detail Status 3 Tests and Diagnostics Table 3-4 Error register contents Name Description BBK1 “0” … Not used (Bad block mark) “1” … A bad block mark is detected. “0” … There is no uncorrectable data error. (Uncorrectable) “1”...

  • Page 170: Head Cleaning

    3 Tests and Diagnostics 3.21 Head Cleaning 3.21 Head Cleaning 3.21.1 Function Description This function cleans the heads in the FDD by executing a series of head load/seek and read operations. A cleaning kit is necessary to perform this program. 3.21.2 Operations 1.

  • Page 171: Log Utilities

    3.22 Log Utilities 3 Tests and Diagnostics 3.22 Log Utilities 3.22.1 Function Description This function logs error information generated while a test is in progress and stores the results in RAM. This function can store data on a floppy disk or output the data to a printer. If the power switch is turned off, the error information will be lost.

  • Page 172

    3 Tests and Diagnostics 3.22 Log Utilities 2. The error information displayed on the screen can be manipulated by the following number keys: 1 scrolls the display to the next page. 2 scrolls the display to the previous page. 3 returns to the Diagnostic Menu. 4 erases all error log information in RAM.

  • Page 173: Running Test

    3.23 Running Test 3 Tests and Diagnostics 3.23 Running Test 3.23.1 Function Description This function automatically executes the following tests in sequence: 1. System test (subtest 01) 2. Memory test (subtests 01, 02, 04, and 06) 3. Real timer test (subtest 02) 4.

  • Page 174

    3 Tests and Diagnostics 3.23 Running Test 4. Select No and press Enter. The following message will appear: Mount the work disk(s) on the drive(s), then press [Enter] key. [Warning : The contents of the disk(s), will be destroyed.] 5. This program is executed continuously. To terminate the program, press Ctrl +Break. 3-62 Satellite A20 Maintenance Manual (960-444)

  • Page 175: Floppy Disk Drive Utilities

    1. FORMAT NOTE: This program is only for testing a floppy disk drive. The option is different from the Toshiba MS-DOS FORMAT command. This program can format a 5.25-inch or 3.5-inch floppy disk in the following formats: (a) 2DD: Double-sided, double-density, double-track, 96/135 TPI, MFM mode, 512 bytes, 9 sectors/track.

  • Page 176

    3 Tests and Diagnostics 3.24 Floppy Disk Drive Utilities 3.24.2 Operations 1. Selecting 7 from the DIAGNOSTIC MENU and pressing Enter displays the following message: [ FDD UTILITIES ] 1 - FORMAT 2 - COPY 3 - DUMP 4 - HDD ID READ 9 - EXIT TO DIAGNOSTICS MENU 2.

  • Page 177

    3.24 Floppy Disk Drive Utilities 3 Tests and Diagnostics 3. COPY program (a) When COPY is selected, the following message appears: FLOPPY DISK FORMAT & COPY : VX.XX Type select (0:2DD,3:2HD) ? (b) Selecting a media/drive type number will display a message similar to the one below: Insert source disk into drive A: Press any key when ready.

  • Page 178

    3 Tests and Diagnostics 3.24 Floppy Disk Drive Utilities 4. DUMP program (a) When DUMP is selected, the following message appears: DIAGNOSTICS-HARD DISK & FLOPPY DISK DUMP : VX.XX Drive type select (1:FDD, 2:HDD) ? (b) When FDD is selected, the following message appears. Select a format type number. When HDD is selected, the display will go to step (g).

  • Page 179

    3.24 Floppy Disk Drive Utilities 3 Tests and Diagnostics Another dump (1:Yes, 2:No) ? Satellite A20 Maintenance Manual (960-444) 3-67...

  • Page 180

    3 Tests and Diagnostics 3.24 Floppy Disk Drive Utilities 5. HDD-ID READ Selecting HDD ID READ displays the following HDD ID configuration: [HDD ID Read (VX.XX)] [Drive #X] ID code (h) = XXXX No. of Cylinders = XXXX XXXX Removable Cylinders = XXXX XXXX No.

  • Page 181: System Configuration

    3 Tests and Diagnostics 3.25 System Configuration 3.25 System Configuration 3.25.1 Function Description The System Configuration program contains the following configuration information for the computer: 1. Processor Type 2. VGA Controller 3. MS-DOS Version 4. BIOS ROM version (1st ID, 2nd ID) 5.

  • Page 182

    3.25 System Configuration 3 Tests and Diagnostics 3.25.2 Operations Selecting 8 from the DIAGNOSTIC MENU and pressing Enter displays the following system configuration: System Configuration Display : Ver X.XX [Machine Name ???] * - Processor Type = XXXX **- VGA Controller = XXXX * - MS-DOS Version = VX.XX...

  • Page 183

    3 Tests and Diagnostics 3.26 SETUP 3.26 SETUP 3.26.1 Function Description This program displays the current system setup information as listed below: 1. Memory (a) Total 2. Password 3. Battery (a) Battery Save Mode 4. Peripheral (a) Internal Pointing Device (b) Parallel Port Mode (c) Hard Disk Mode 5.

  • Page 184

    3.26 SETUP 3 Tests and Diagnostics (a) PCI Bus Satellite A20 Maintenance Manual (960-444) 3-69...

  • Page 185

    3 Tests and Diagnostics 3.26 SETUP 11. Legacy Emulation (a) USB keyboard/Mouse Legacy Emulation (b) USB-FDD Legacy Emulation 12. PC Card (a) Controller Mode 13. Drives I/O (a) Built-in HDD (b) Select Bay 14. PCI LAN (a) Built-in LAN 3-70 Satellite A20 Maintenance Manual (960-444)

  • Page 186

    3.26 SETUP 3 Tests and Diagnostics 3.26.2 Accessing the SETUP Program Selecting 0 from the DIAGNOSTICS MENU and pressing Enter displays the TSETUP screen. The TSETUP screen is divided into two pages: SYSTEM SETUP (1/2) and SYSTEM SETUP (2/2). Satellite A20 Maintenance Manual (960-444) 3-71...

  • Page 187

    3 Tests and Diagnostics 3.26 SETUP NOTE: 1. Panel Power On/Off item appears only when the Power-up Mode is in Resume mode. 2. The USB FDD Legacy Emulation item appears under the LEGACY EMULATION item only when Floppy Disk I/O is set to Disabled. 3.

  • Page 188

    3.26 SETUP 3 Tests and Diagnostics Moving Within the SETUP Menu and Changing Values 1. Press ß and à to move between the two columns. Press PgDn and PgUp to move between the two pages. Press to move between items in a column. 2.

  • Page 189

    3 Tests and Diagnostics 3.26 SETUP SETUP Options The SETUP screen is divided into functionally related groups. This section describes each group and its options. 1. Memory This group of options displays the computer’s memory. (a) Total This field displays the total amount of memory installed and is automatically calculated by the computer.

  • Page 190

    3.26 SETUP 3 Tests and Diagnostics Display Auto Off Use this option to disable or set the duration of the display automatic power off function. This function causes the computer to turn the LCD panel’s illumination off if you make no entry for the set period of time. Disabled Disables display automatic power off.

  • Page 191

    3 Tests and Diagnostics 3.26 SETUP 4. Peripheral Use this option to select the parallel port mode and hard disk mode. (a) Internal Pointing Device This option enables and disables the Touch Pad. Enabled Enables the Touch Pad. (Default) Disabled Disables the Touch Pad.

  • Page 192

    3.26 SETUP 3 Tests and Diagnostics 5. Display This group of options configures the computer’s display. (a) Power On Display This option is used to select the display when booting up. Auto-Selected Selects an external monitor if one is connected. Otherwise it selects the internal LCD.

  • Page 193

    3 Tests and Diagnostics 3.26 SETUP 6. Boot Priority This tab sets the priority for booting the computer and the priority for the built-in HDD or optional secondary HDD. (a) Boot Priority CD-ROM LAN: The computer looks for bootable files in the following order: HDD,FDD, CD- ROM and LAN.

  • Page 194

    3.26 SETUP 3 Tests and Diagnostics (c) Network Boot Protocol Use this option to set the starting method via a network. Sets to PXE protocol (Default) Sets to PRL protocol 7. Others Whether or not you need to configure the computer with these options depends primarily on the kind of software or peripherals you use.

  • Page 195

    3 Tests and Diagnostics 3.26 SETUP (d) Auto Power On Use this option to set a time and date for automatic power on and enable or disable the ring indicator feature. Ring Indicator displays only when the computer is in Resume mode and the Alarm Date Option displays when Alarm Time is enabled.

  • Page 196

    3.26 SETUP 3 Tests and Diagnostics (b) System Time Use this option to set the system time of the computer. 9. Configuration This field displays the configuration method. The devices are initialized when the PNP OS loads. Setup by OS First, devices necessary for loading the OS will be initialized.

  • Page 197

    3 Tests and Diagnostics 3.26 SETUP When the Printer Port Mode (see settings below) is set to ECP, the DMA channel can also be set to 1, 2 or 3. The default is 3. LPT setting Interrupt level I/O address DMA channel LPT 1 378H...

  • Page 198

    3.26 SETUP 3 Tests and Diagnostics 11. PCI Bus This item displays the interrupt level for the Card Bus. It is for information only and cannot be changed. PCI BUS = IRQ11 12. Legacy Emulation. (a) USB keyboard/Mouse Legacy Emulation. Use this option to enable or disable USB KB/Mouse Legacy Emulation.

  • Page 199

    3 Tests and Diagnostics 3.26 SETUP (b) CD-ROM Secondary IDE (170H/IRQ15) (c) PC Card When an ATA card is installed in IN13h, the sub window below is displayed. DRIVES I/O Built-in HDD = Primary IDE (1F0H/IRQ14) ATA Card = Others (190H/IRQ) 15.

  • Page 200

    3.26 SETUP 3 Tests and Diagnostics Satellite A20 Maintenance Manual (960-444) 3-85...

  • Page 201

    Chapter 4 Replacement Procedures...

  • Page 202

    4 Replacement Procedures 4-ii Satellite A20 Maintenance Manual (960-444)

  • Page 203: Table Of Contents

    4 Replacement Procedures Chapter 4 Contents General........................4-1 Battery Pack........................ 4-8 Optional PC Card...................... 4-10 Optional SD Card...................... 4-12 HDD ......................... 4-13 Modem Daughter Card ....................4-17 ODD ......................... 4-19 Cooling Fan....................... 4-23 CPU.......................... 4-26 4.10 Keyboard ........................4-31 4.11 Memory Module......................

  • Page 204

    Replacing the 15.0-inch SXGA+ Samsung Fluorescent Lamp....4-145 4.30.7 Replacing the 15.0-inch SXGA+ Sharp Fluorescent Lamp ....4-155 4.30.8 Replacing the 14.1-inch XGA TOSHIBA Fluorescent Lamp ....4-180 4.30.9 Replacing the 14.1-inch XGA Sharp Fluorescent Lamp....... 4-192 4.30.10 Replacing the 14.1-inch XGA Samsung Fluorescent Lamp ....4-199 4.30.11 Replacing the 14.1-inch XGA L.G.

  • Page 205

    4 Replacement Procedures Figure 4-14 Applying new grease ..................4-29 Figure 4-15 Removing the Keyboard brace............... 4-31 Figure 4-16 Removing the Keyboard................. 4-32 Figure 4-17 Removing the Keyboard support plate............4-33 Figure 4-18 Removing the Memory module ............... 4-35 Figure 4-19 Removing the Wireless LAN card cover............

  • Page 206

    4 Replacement Procedures Figure 4-45 Removing the Cable hold plate/Cable earth plate..........4-76 Figure 4-46 Removing the LCD cable (2)................4-77 Figure 4-47 Removing the Hinge (1).................. 4-78 Figure 4-48 Removing the Hinge (2).................. 4-79 Figure 4-49 Installing the Wireless LAN/Bluetooth antenna cable ........4-80 Figure 4-50 Replacing LG.Philips fluorescent lamp (XGA) (1) ...........

  • Page 207

    4 Replacement Procedures Figure 4-75 Replacing Sharp fluorescent lamp (XGA) (9)..........4-112 Figure 4-76 Replacing Sharp fluorescent lamp (XGA) (10)..........4-113 Figure 4-77 Replacing Sharp fluorescent lamp (XGA) (11)..........4-114 Figure 4-78 Replacing Sharp fluorescent lamp (XGA) (12)..........4-115 Figure 4-79 Replacing Sharp fluorescent lamp (XGA) (13)..........

  • Page 208

    4 Replacement Procedures Figure 4-105 Replacing Samsung fluorescent lamp (SXGA+) (2)........4-146 Figure 4-106 Replacing Samsung fluorescent lamp (SXGA+) (3)........4-147 Figure 4-107 Replacing Samsung fluorescent lamp (SXGA+) (4)........4-148 Figure 4-108 Replacing Samsung fluorescent lamp (SXGA+) (5)........4-149 Figure 4-109 Replacing Samsung fluorescent lamp (SXGA+) (6)........4-150 Figure 4-110 Replacing Samsung fluorescent lamp (SXGA+) (7)........

  • Page 209

    4 Replacement Procedures Figure 4-135 Replacing Sharp fluorescent lamp (SXGA+) (23).......... 4-177 Figure 4-136 Replacing Sharp fluorescent lamp (SXGA+) (24).......... 4-178 Figure 4-137 Replacing Sharp fluorescent lamp (SXGA+) (25).......... 4-179 Figure 4-138 Removing the tape and insulation sheet............4-180 Figure 4-139 Removing the screws..................4-181 Figure 4-140 Removing the double-sided tape..............

  • Page 210

    4 Replacement Procedures Figure 4-165 Removing the screws for fixing the FL tube back cover......... 4-204 Figure 4-166 Disconnecting the FL tube ground wire ............4-205 Figure 4-167 Removing the FL tube.................. 4-206 Figure 4-168 Removing the outside tape/cover tape............4-209 Figure 4-169 Removing the control PCB, top case and cover assembly......

  • Page 211

    4.1 General 4 Replacement Procedures Replacement Procedures General This section explains how to disassemble the computer and replace Field Replaceable Units (FRUs). It may not be necessary to remove all the FRUs in order to replace one. The chart below is a guide to which FRUs need to be removed in order to remove others.

  • Page 212

    Before you begin disassembly, read the following safety precautions and observe them carefully as you work. DANGER: 1. Always use the genuine battery that is authorized by Toshiba or compatible with the unit. Since other battery packs have different specifications, they may be incompatible with the unit, and may burst or explode.

  • Page 213

    4.1 General 4 Replacement Procedures Before You Begin Look over the procedures in this section before you begin disassembling the computer. Familiarize yourself with the disassembly and reassembly steps. Begin each procedure by removing the AC adapter and the battery pack as instructed in this section: 1.

  • Page 214: Disassembly Procedures, Assembly Procedures

    4 Replacement Procedures 4.1 General Disassembly Procedures The computer has two basic types of cable connectors: Pressure Plate Connectors Coaxial Cable Connectors Normal Pin Connectors To disconnect a Pressure Plate connector, lift up the tabs on either side of the connector’s plastic pressure plate and slide the cable out of the connector.

  • Page 215

    4.1 General 4 Replacement Procedures After installing an FRU in the computer, confirm that the FRU and the computer are functioning properly. Satellite A20 Maintenance Manual (960-444)

  • Page 216

    4 Replacement Procedures 4.1 General Tools and Equipment The use of Electrostatic Discharge (ESD) equipment is very important for your safety and the safety of those around you. Proper use of these devices will increase the success rate of your repairs and lower the cost for damaged or destroyed parts.

  • Page 217

    CAUTION: Overtightening can damage components and screws; undertightening can result in electrical shorts or other damage if screws or components come loose. NOTE: Toshiba recommends that you use an electric screw driver for quick and easy operations. 0.17 N·m (1.7 kgf·cm) M2.5...

  • Page 218

    4 Replacement Procedures 4.1 General Color of Screw Shaft To avoid mistakes on the screw length, screw shafts are colored as follows: q Even number length screw: brown q Odd number length screw: white q Special length screw: blue Screws whose lengths are indicated to one or more decimal places such as 2.5 mm or 2.8 Marking of Screws on the Computer Body To make maintenance of the computer easier, markings of the kinds of the screws including the types and lengths of the screws are indicated on the computer body.

  • Page 219: Battery Pack

    5. While sliding the battery latch, insert your finger into the slot, then pull the battery pack to the back side of the computer and lift it out. NOTE: For environmental reasons, do not throw away a spent battery pack. Please return the spent battery packs to Toshiba. Satellite A20 Maintenance Manual (960-444)

  • Page 220

    4 Replacement Procedures 4.2 Battery Pack Figure 4-1 Removing the Battery cover 4-10 Satellite A20 Maintenance Manual (960-444)

  • Page 221

    Dispose of the battery as required by local ordinances or regulations. Use only batteries recommended by Toshiba as replacements. NOTE: Check the battery's terminals visually. If they are dirty, wipe them clean with a dry cloth.

  • Page 222: Optional Pc Card

    4 Replacement Procedures 4.3 Optional PC Card Optional PC Card Removing an Optional PC Card To remove a PC card (option), follow the steps below and refer to figure 4-2. CAUTION: Before you remove a PC card, refer to the card's documentation and to your operating system documentation for proper procedures and precautions.

  • Page 223

    4.3 Optional PC Card 4 Replacement Procedures Installing an Optional PC Card To install a PC card, follow the steps below and refer to figure 4-2. 1. Insert a PC card. 2. Push it carefully to ensure a firm connection. Satellite A20 Maintenance Manual (960-444) 4-13...

  • Page 224: Optional Sd Card

    4 Replacement Procedures 4.4 Optional SD Card Optional SD Card Removing an Optional SD Card To remove an SD card (option), follow the steps below and refer to figure 4-3. CAUTION: Before you remove an SD card, refer to the card's documentation and to your operating system documentation for proper procedures and precautions.

  • Page 225

    4.4 Optional SD Card 4 Replacement Procedures 2. Push it carefully to ensure a firm connection. Satellite A20 Maintenance Manual (960-444) 4-15...

  • Page 226

    4 Replacement Procedures 4.5 HDD CAUTION: When handling the HDD, do not press the top surface as shown by the arrow. Hold it by the sides. Removing the HDD To remove the HDD, follow the steps below and refer to figures 4-4 to 4-6. 1.

  • Page 227

    4.5 HDD 4 Replacement Procedures 3. Lift up the HDD cover. 4. Pull the guide of the HDD and remove the HDD. Be careful not to damage the connector. HDD pack Guide Figure 4-5 Removing the HDD pack Satellite A20 Maintenance Manual (960-444) 4-17...

  • Page 228

    4 Replacement Procedures 4.5 HDD NOTE: The following steps describe how to disassemble the HDD pack; however, do not disassemble if the HDD is working properly. 5. Place the HDD pack on a flat surface, and remove the following screws. M3 4 FLAT screw 6.

  • Page 229

    4.5 HDD 4 Replacement Procedures Installing the HDD To install the HDD, follow the steps below and refer to figures 4-4 to 4-6. CAUTION: Do not hold the HDD by its top and bottom flat surfaces. It may damage the HDD.

  • Page 230: Modem Daughter Card

    4 Replacement Procedures 4.6 Modem Daughter Card Modem Daughter Card Removing the Modem Daughter Card To remove the modem daughter card, follow the steps below and refer to figure 4-7. 1. Remove the following screws securing the modem daughter card. M2 3 SUPER FLAT screw 2.

  • Page 231

    4.6 Modem Daughter Card 4 Replacement Procedures Installing the Modem Daughter Card To install the modem daughter card, follow the steps below and refer to figure 4-7. 1. Carefully connect the modem cable to JP1 on the modem daughter card. 2.

  • Page 232

    4 Replacement Procedures 4.7 ODD Removing the ODD To remove the ODD, follow the steps below and refer to figures 4-8 and 4-9. CAUTION: The ODD can become hot with use. Be careful when removing the module. 1. Remove the following screw securing the ODD cover. M2.5 6 FLAT HEAD screw 2.

  • Page 233

    4.7 ODD 4 Replacement Procedures 3. Carefully slide the ODD to the side of the computer. Figure 4-8 Removing the ODD Satellite A20 Maintenance Manual (960-444) 4-23...

  • Page 234

    4 Replacement Procedures 4.7 ODD 4. Remove the following screws and the plastic frame. M2 3 SUPER FLAT screw M2 5 SUPER FLAT screw Figure 4-9 Disassembling the ODD 4-24 Satellite A20 Maintenance Manual (960-444)

  • Page 235

    4.7 ODD 4 Replacement Procedures Installing the ODD To install the ODD, follow the steps below and refer to figures 4-8 and 4-9. 1. Seat the plastic frame on the side of the ODD, and secure it with the following screws. M2 3 SUPER FLAT screw M2 5 SUPER FLAT screw 2.

  • Page 236: Cooling Fan

    4 Replacement Procedures 4.8 Cooling Fan Cooling Fan Removing the Cooling Fan To remove the cooling fan, follow the steps below and refer to figure 4-10. NOTE: A filter is attached to the back of the fan cover to prevent dust or dirt from entering inside of the computer.

  • Page 237

    4.8 Cooling Fan 4 Replacement Procedures 5. Disconnect the fan cable from PJ9900 on the system board. M2.5 4 FLAT HEAD screw PJ9900 Fin cover Fan cover M2.5 6 FLAT HEAD screw F a n M2.5 6 FLAT HEAD screw Figure 4-10 Removing the Cooling fan module Satellite A20 Maintenance Manual (960-444) 4-27...

  • Page 238

    4 Replacement Procedures 4.8 Cooling Fan Installing the Cooling Fan To install the cooling fan, follow the steps below and refer to figures 4-10. CAUTION: Before installing the fan cover, vacuum off dust or dirt on the indentation of the filter attached to the fan cover. 1.

  • Page 239

    4.9 CPU 4 Replacement Procedures Removing the CPU To remove the CPU, follow the steps below and refer to figures 4-11 to 4-14. CAUTION: When you remove the CPU, wipe the grease off of the bottom of the heat sink, bottom of the cooling fan and top of the CPU. Apply new grease when installing. 1.

  • Page 240

    4 Replacement Procedures 4.9 CPU 2. Remove the fan cover and fan. NOTE: To remove the fin, the fan cover and fan must be removed. For removing the fan cover and fan, refer to 4.8 Cooling Fan. 3. Remove the following screws securing the fin and remove the fin by lifting it up directly above.

  • Page 241

    4.9 CPU 4 Replacement Procedures 4. Turn the cam to the unlock position with a flat-blade screwdriver to unlock the CPU. Figure 4-13 Unlocking the CPU 4. Lift up the CPU. Satellite A20 Maintenance Manual (960-444) 4-31...

  • Page 242

    4 Replacement Procedures 4.9 CPU Installing the CPU To install the CPU, follow the steps below and refer to figures 4-11 to 4-14. 1. Make sure the cam is in the open position. 2. Seat the CPU in the CPU socket. Make sure the alignment is exact to avoid damaging pins on the CPU.

  • Page 243

    4.9 CPU 4 Replacement Procedures 5. Place the fin and secure it with the following screws. M2 18 BIND screw 6. Install the fan and fan cover. NOTE: To remove the fin, the fan cover and fan must be removed. For installing the fan and fan cover, refer to 4.8 Cooling Fan.

  • Page 244

    4.10 Keyboard 4 Replacement Procedures Replacement Procedures 4.10 Keyboard Removing the Keyboard To remove the keyboard, follow the steps below and refer to figures 4-15 to 4-17. 1. Turn the computer face up and open the display panel. 2. Insert your fingernails into latches between the keyboard brace and the computer, and lift up the keyboard brace to unlatch and remove it.

  • Page 245

    4 Replacement Procedures 4.10 Keyboard 3. Remove the following screws securing the keyboard. M2.5 4 FLAT HEAD screw 4. Remove the following screw securing the keyboard hold plate and remove the keyboard hold plate. M2.5 4 FLAT HEAD screw M2.5 4 FLAT HEAD screw Keyboard hold plate M2.5 4 FLAT HEAD screw Figure 4-16 Removing the Keyboard...

  • Page 246

    4.10 Keyboard 4 Replacement Procedures 5. Rotate out the keyboard and lay it on top of the palm rest. 6. Remove the following screw securing the keyboard support plate and remove the keyboard support plate. M2.5 6 FLAT HEAD screw Figure 4-17 Removing the Keyboard support plate 7.

  • Page 247

    4 Replacement Procedures 4.10 Keyboard Installing the Keyboard To install the keyboard, follow the steps below and refer to figures 4-15 to 4-17. 1. Seat the keyboard face down on the palm rest. 2. Connect the keyboard cable to PJ3230 on the system board. 3.

  • Page 248: Memory Module

    4.11 Memory Module 4 Replacement Procedures 4.11 Memory Module Removing a Memory Module To remove a memory module, make sure the computer is in boot mode and powered off, follow the steps below and refer to figures 4-18. CAUTION: Do not try to remove a memory module with the computer turned on. The computer or the memory might be damaged.

  • Page 249

    4 Replacement Procedures 4.11 Memory Module Insulator Two latches Memory slot B Memory module Memory slot A Figure 4-18 Removing the Memory module 4-36 Satellite A20 Maintenance Manual (960-444)

  • Page 250

    4.11 Memory Module 4 Replacement Procedures Installing a Memory Module To install a memory module, make sure that the computer is in boot mode and powered off, follow the steps below and refer to figure 4-18. CAUTION: 1) Do not install a memory module in slot B only. Use slot A prior to slot B. Otherwise, the computer or the memory may be damaged.

  • Page 251: Wireless Lan Card

    4 Replacement Procedures 4.12 Wireless LAN Card 4.12 Wireless LAN Card Removing the Wireless LAN Card To remove the wireless LAN card, make sure the computer is in boot mode and powered off, follow the steps below and refer to figures 4-19 and 4-20. NOTE: The wireless LAN card is an option in some models.

  • Page 252

    4.12 Wireless LAN Card 4 Replacement Procedures M2 4 LH STICK screw Keyboard insulator Wireless LAN card cover Figure 4-19 Removing the Wireless LAN card cover Satellite A20 Maintenance Manual (960-444) 4-39...

  • Page 253

    4 Replacement Procedures 4.12 Wireless LAN Card 3. Disconnect the wireless LAN antenna cables (black and white) from the wireless LAN card using an antenna coaxial cable disconnector. Figure 4-20 Removing the Wireless LAN card 4. Push the wireless LAN card lock latches outward to release the wireless LAN card. It will pop up to about a 45-degree angle.

  • Page 254

    4.12 Wireless LAN Card 4 Replacement Procedures Installing the Wireless LAN Card To install the wireless LAN card, make sure that the computer is in boot mode and powered off, follow the steps below and refer to figure 4-21. CAUTION: Be sure to switch the computer off before removing the wireless LAN card. Otherwise, the computer or the wireless LAN card may be damaged.

  • Page 255

    4 Replacement Procedures 4.13 Bluetooth 4.13 Bluetooth Removing the Bluetooth To remove the Bluetooth, follow the steps below and refer to figure 4-21. CAUTION: Do not try to remove the Bluetooth module with the computer turned on. You can damage the computer or Bluetooth module. Do not touch the connectors on the Bluetooth module on the computer.

  • Page 256

    4.13 Bluetooth 4 Replacement Procedures M2 3 SUPER FLAT screw Bluetooth module Bluetooth coaxial cable Bluetooth SUMI card PJ4900 Figure4-21 Removing the Bluetooth module Installing the Bluetooth To install the Bluetooth, follow the steps below and refer to figure 4-21. 1.

  • Page 257: Top Cover With Display Assembly

    4 Replacement Procedures 4.14 Top Cover with Display Assembly 4.14 Top Cover with Display Assembly Removing the Top Cover with Display Assembly To remove the top cover with display assembly, follow the steps below and refer to figures 4-23 and 4-24. 1.

  • Page 258

    4.14 Top Cover with Display Assembly 4 Replacement Procedures Figure 4-23 Removing the Display assembly Satellite A20 Maintenance Manual (960-444) 4-45...

  • Page 259

    4 Replacement Procedures 4.14 Top Cover with Display Assembly 2. Disconnect the sub fan cable from PJ8770 on the system board. 3. Turn the computer face up and open the display panel. 4. Remove the following screws securing the top cover. M2.5 6 FLAT HEAD screw 5.

  • Page 260

    4.14 Top Cover with Display Assembly 4 Replacement Procedures Installing the Top Cover with Display Assembly To install the top cover with display assembly, follow the steps below and refer to figures 4-23 and 4-24. 1. Install the top cover on the display assembly. NOTE: When installing the top cover on display assembly, be careful to pinch the wireless LAN or Bluetooth antenna coaxial cables.

  • Page 261: Touch Pad

    4 Replacement Procedures 4.15 Touch Pad 4.15 Touch Pad Removing the Touch Pad To remove the touch pad, follow the steps below and refer to figure 4-25. 1. Disconnect the touch pad SUMI card from PJ3240 on the system board. 2.

  • Page 262

    4.15 Touch Pad 4 Replacement Procedures Installing the Touch Pad To install the touch pad, follow the steps below and refer to figure 4-25. 1. Connect the touch pad SUMI card to J1 on the touch pad, if necessary. 2. Seat the touch pad. 3.

  • Page 263: Front Membrane Assy

    4 Replacement Procedures 4.16 Front Membrane ASSY 4.16 Front Membrane ASSY Removing the Front Membrane ASSY To remove the front membrane ASSY, follow the steps below and refer to figure 4-26. 1. Disconnect the front membrane cable from PJ3260 on the system board. 2.

  • Page 264

    4.16 Front Membrane ASSY 4 Replacement Procedures Installing the Front Membrane ASSY To install the front membrane ASSY, follow the steps below and refer to figures 4-26. 1. Place the front membrane ASSY and front membrane holder on it, and secure them with the following screws.

  • Page 265: Fir Board

    4 Replacement Procedures 4.17 FIR Board 4.17 FIR Board Removing the FIR Board To remove the FIR board, follow the steps below and refer to figure 4-27. 1. Remove the following screws securing the FIR board. M2.5 6 FLAT HEAD screws 2.

  • Page 266

    4.17 FIR Board 4 Replacement Procedures Installing the FIR Board To install the FIR board, follow the steps below and refer to the figure 4-27. 1. Connect the FIR board to PJ9500 on the system board. 2. Check the position of the wireless communication switch on the FIR board and the switch on the system chassis.

  • Page 267: Sound Board

    4 Replacement Procedures 4.18 Sound Board 4.18 Sound Board Removing the Sound Board To remove the sound board, follow the steps below and refer to figure 4-28. 1. Disconnect the sound board SUMI card from PJ9510 and PJ9511 on the system board. 2.

  • Page 268

    4.18 Sound Board 4 Replacement Procedures Installing the Sound Board To install the sound board, follow the steps below and refer to figure 4-28. 1. Connect the sound board SUMI card to PJ9600 and PJ9601 on the sound board. 2. Seat the sound board. When seating, insert three jacks on the sound board into the holes of the chassis first.

  • Page 269: Rtc Battery

    4.19 RTC Battery WARNING: When replacing the RTC battery, be sure to use genuine batteries or replacement batteries authorized by Toshiba. Installing the wrong battery could cause a battery explosion or other damage. If the RTC battery is found abnormal, it must not be installed. Replace it with a new battery, and dispose of the old one according to the local regulations.

  • Page 270

    4.19 RTC Battery 4 Replacement Procedures Removing the RTC Battery To remove the RTC battery, follow the steps below and refer to figure 4-29. 1. Disconnect the RTC battery cable from PJ9999 on the system board. 2. Pull the hook on each side fixing the RTC battery outward and lift out the RTC battery. System board RTC battery PJ9999...

  • Page 271: Dc-in Jack

    4 Replacement Procedures 4.20 DC-IN Jack 4.20 DC-IN Jack Removing the DC-IN Jack To remove the DC-IN jack, follow the steps below and refer to figure 4-30. 1. Disconnect the DC-IN cable from PJ8800 on the system board. 2. Remove the DC-IN jack. DC-IN jack DC-IN cable PJ8800...

  • Page 272

    4.20 DC-IN Jack 4 Replacement Procedures Satellite A20 Maintenance Manual (960-444) 4-59...

  • Page 273: System Board

    4 Replacement Procedures 4.21 System Board Replacement Procedures 4.21 System Board Removing the System Board To remove the system board, follow the steps below and refer to figure 4-31. 1. Remove the following screws securing the plastic holder and the system board. M2.5 6 FLAT HEAD screw Figure 4-31 Removing the System board...

  • Page 274

    4.21 System Board 4 Replacement Procedures 4. Remove the key bracket on the left side of the chassis outside. Installing the System Board To install the system board, follow the steps below and refer to figures 4-31. 1. Install the key bracket on the left side of the chassis. 2.

  • Page 275: Sub Fan

    4 Replacement Procedures 4.22 Sub Fan 4.22 Sub Fan Removing the Sub Fan To remove the sub fan board, follow the steps below and refer to figure 4-32. 1. Remove the following screws securing the sub fan. M2.5 6 FLAT HEAD screw 2.

  • Page 276

    4.22 Sub Fan 4 Replacement Procedures Installing the Sub Fan To install the sub fan board, follow the steps below and refer to figures 4-32. 1. Place the sub fan. 2. Pass the sub fan cable in the hole of the chassis. 3.

  • Page 277: Pc Card Slot

    4 Replacement Procedures 4.23 PC Card Slot 4.23 PC Card Slot Removing the PC Card Slot To remove the PC card slot, follow the steps below and refer to figure 4-33. 1. Lay the system board face up. 2. Remove the following screws securing the PC card slot. M2 12 BIND screw M2 12 BIND screw PC Card slot...

  • Page 278

    4.23 PC Card Slot 4 Replacement Procedures Installing the PC card slot To install the PC card slot, follow the steps below and refer to figure 4-33. 1. Lay the system board face down and seat the PC card slot. 2.

  • Page 279

    4 Replacement Procedures 4.24 Speakers 4.24 Speakers Removing the Speakers To remove the speakers, follow the steps below and refer to figures 4-34 and 4-35. 1. Lay the top cover and display assembly face down and remove the insulator. 2. Remove the following screws securing the side covers. M2.5 6 FLAT HEAD screw M2.5 6 FLAT HEAD screw...

  • Page 280

    4.24 Speakers 4 Replacement Procedures 3. Remove the two tapes securing the speaker cables. 4. Remove the speakers and speaker cables from their guides. 5. Remove the side speaker (right and left) from the front of the computer. Side cover Figure 4-35 Removing the Side cover Installing the Speakers To install the speakers, follow the steps below and refer to figures 4-34 and 4-35.

  • Page 281: Touch Pad Switch

    4 Replacement Procedures 4.25 Touch Pad Switch 4.25 Touch Pad Switch Removing the Touch Pad Switch To remove the touch pad switch, follow the steps below and refer to figure 4-36. 1. Remove the following screws securing the touch pad switch. M2.5 4 TAPPING screw 2.

  • Page 282

    4.25 Touch Pad Switch 4 Replacement Procedures M2.5 4 TAPPING screw Satellite A20 Maintenance Manual (960-444) 4-65...

  • Page 283: Display Mask

    4 Replacement Procedures 4.26 Display Mask 4.26 Display Mask Removing the Display Mask To remove the display mask, follow the steps below and refer to figures 4-37 and 4-38. 1. Remove the two mask seals at the lower part of the display mask. 2.

  • Page 284

    4.26 Display Mask 4 Replacement Procedures 4. Remove the display mask. Display Mask Figure 4-38 Removing the Display mask (2) Installing the Display Mask To install the display mask, follow the steps below and refer to figures 4-37 and 4-38. 1.

  • Page 285: Fl Inverter

    4 Replacement Procedures 4.27 FL Inverter 4.27 FL Inverter Removing the FL Inverter To remove the FL inverter, follow the steps below and refer to figure 4-39. 1. Remove the following screw securing the FL inverter. M2 6 SUPER FLAT screw 2.

  • Page 286

    4.27 FL Inverter 4 Replacement Procedures Installing the FL Inverter To install the FL inverter, follow the steps below and refer to figure 4-39. 1. Connect the FL cable and the HV cable to the FL inverter. 2. Seat the FL inverter board and stick the insulator on the FL inverter of the FL cable side. 3.

  • Page 287: Lcd Module

    4 Replacement Procedures 4.28 LCD Module 4.28 LCD Module NOTE: Be careful not to apply pressure to the ICs along the edge of LCD module. The ICs are easily damaged. NOTE: For environmental reasons, do not throw away a malfunctioning LCD module (or FL).

  • Page 288

    4.28 LCD Module 4 Replacement Procedures 5. Disconnect the LCD cable and remove the LCD module. Connector Glass tape Copper tape (SXGA+ models only) M2 5 SUPER FLAT screw Figure 4-40 Removing the LCD module (1) Satellite A20 Maintenance Manual (960-444) 4-71...

  • Page 289

    4 Replacement Procedures 4.28 LCD Module 6. Remove the following screw securing the two metal braces to the LCD module. M2 3 SUPER FLAT screw M2 3 SUPER FLAT screw LCD module Metal brace M2 3 SUPER FLAT screw Figure 4-41 Removing the LCD module (2) 4-72 Satellite A20 Maintenance Manual (960-444)

  • Page 290

    4.28 LCD Module 4 Replacement Procedures Installing the LCD Module To install the LCD module, follow the steps below and refer to figures 4-40 and 4-41. 1. Secure the two metal braces to the LCD module with the following screws. M2 3 SUPER FLAT screw 2.

  • Page 291

    4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover Removing the Wireless LAN Antenna/Bluetooth Antenna/Display Cover To remove the wireless LAN antenna/Bluetooth antenna/display cover, follow the steps below and refer to figures 4-42 to 4-48. NOTE: When you open or close the top cover, hold it by the sides close to the hinges to prevent damage.

  • Page 292

    4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 4 Replacement Procedures 2. (For Wireless LAN/Bluetooth models only) Peel off the three acetate tapes securing the wireless LAN antenna cables and Bluetooth antenna cable and remove the wireless LAN antennas and Bluetooth antenna from the display cover.

  • Page 293

    4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 3. Remove the following screw securing the metal plate on the LCD cable and remove the metal plate. M2.5 4 TAPPING screw M2.5 4 TAPPING screw Metal plate LCD cable Figure 4-44 Removing the LCD cable (1) 4-76 Satellite A20 Maintenance Manual (960-444)

  • Page 294

    4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 4 Replacement Procedures 4. Turn the display cover face down and remove the insulator. 5. Remove the following screws securing the cable hold plate and cable earth plate. M2.5 6 TAPPING screw M2.5 6 TAPPING screw Cable earth plate Cable hold plate Figure 4-45 Removing the Cable hold plate/Cable earth plate...

  • Page 295

    4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 7. Remove the LCD cable from the display assembly. LCD cable Figure 4-46 Removing the LCD cable (2) 4-78 Satellite A20 Maintenance Manual (960-444)

  • Page 296

    4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 4 Replacement Procedures 8. Remove the following screws securing the two hinges to the display cover. M2.5 4 FLAT HEAD screw M2.5 5 FLAT HEAD screw M2.5 4 FLAT BIND screw M2.5 5 FLAT HEAD screw M2.5 5 FLAT HEAD screw Figure 4-47 Removing the Hinge (1) Satellite A20 Maintenance Manual (960-444)

  • Page 297

    4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 9. Remove the display cover from the display assembly. 10. Remove the following screws securing the two hinges to the display cover. M2.5 6 FLAT HEAD screw M2.5 6 FLAT HEAD screw M2.5 6 FLAT HEAD screw Figure 4-48 Removing the Hinge (2) 4-80...

  • Page 298

    4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 4 Replacement Procedures Installing the Wireless LAN Antenna/Bluetooth Antenna/Display Cover To install the wireless LAN antenna/Bluetooth antenna/display cover, follow the steps below and refer to figures 4-42 to 4-49. 1. Install the two hinges on the hole of the display assembly and secure the hinges with the following screws.

  • Page 299

    4 Replacement Procedures 4.29 Wireless LAN Antenna/Bluetooth Antenna/Display Cover 3. Pass the LCD cable through the hole from the top of the display assembly toward its bottom. 4. Close the display cover and turn the display assembly face down. 5. Place the cable earth plate first and then place the cable hold plate on the display cable and secure them with the following screws.

  • Page 300: Fluorescent Lamp

    G33C0000Q110 Sharp 4.30.3 G33C0000M110 CHIMEI 4.30.4 15.0 G33C0000R110 LG.Philips 4.30.5 inch (SXGA+) G33C0000N110 Samsung 4.30.6 G33C0000P110 Sharp 4.30.7 14.1 VF2091P01 TOSHIBA 4.30.8 inch (XGA) VF2057P01 Sharp 4.30.9 VF2058P01 Samsung 4.30.10 VF2062P01 L.G. Philips 4.30.11 4-82 Satellite A20 Maintenance Manual (960-444)

  • Page 301

    4.30 Fluorescent Lamp 4 Replacement Procedure NOTE: - When working with an LCD module, always use a flat, grounded table. - Handle the backlight unit in the environment without dust, such as on the clean bench. Keep the worktable free from any screws or other material that may scratch the LCD surface.

  • Page 302

    4 Replacement Procedure 4.30 Fluorescent Lamp Cover shield (C) Cover shield (G) Adhesive tape Tape shield Adhesive tape Figure 4-50 Replacing LG.Philips fluorescent lamp (XGA) (1) 4-84 Satellite A20 Maintenance Manual (960-444)

  • Page 303

    4.30 Fluorescent Lamp 4 Replacement Procedure 2. Remove the top case. Be careful not to apply excessive force to the top case and gate TCP. Top case Figure 4-51 Replacing LG.Philips fluorescent lamp (XGA) (2) Satellite A20 Maintenance Manual (960-444) 4-85...

  • Page 304

    4 Replacement Procedure 4.30 Fluorescent Lamp 3. Remove the source PCB and gate PCB. 1) Remove the source PCB. Be careful not to apply excessive force to the PCB or TCP when removing the double-sided tape. 2) Remove the gate PCB. Be careful not to apply excessive force to the PCB or TCP when removing the double-sided tape.

  • Page 305

    4.30 Fluorescent Lamp 4 Replacement Procedure 4. Remove the board assembly, adhesive tape, light guide and cover assembly bottom (L). 1) Remove the board assembly. 2) Remove the adhesive tape securing the sheets (four points). 3) Remove the sheets and light guide. NOTE: No penetration of foreign object is indispensable not to scratch the sheets.

  • Page 306

    4 Replacement Procedure 4.30 Fluorescent Lamp Assembling the 15.0-inch XGA LG.Philips Fluorescent Lamp To assemble the 15.0-inch XGA LG.Philips fluorescent lamp, follow the steps below and refer to figures 4-54 to 4-57. 1. Install the cover assembly bottom (L), sheets, light guide, adhesive tape and board assembly. 1) Remove the protect film from the cover assembly bottom (L).

  • Page 307

    4.30 Fluorescent Lamp 4 Replacement Procedure Board assembly Adhesive tape Double-sided tape Double-sided tape Adhesive tape Double-sided tape Double-sided tape Adhesive tape Adhesive tape Sheets and LGP Screw Cover assembly bottom (L) Screw Figure 4-54 Replacing LG.Philips fluorescent lamp (XGA) (5) Satellite A20 Maintenance Manual (960-444) 4-89...

  • Page 308

    4 Replacement Procedure 4.30 Fluorescent Lamp 2. Install the source PCB and gate PCB. 1) Install the source PCB. NOTE: Be careful not to apply excessive force to the TCP. 2) Install the gate PCB. NOTE: Be careful not to apply excessive force to the TCP. Source PCB Gate PCB Figure 4-55 Replacing LG.Philips fluorescent lamp (XGA) (6)

  • Page 309

    4.30 Fluorescent Lamp 4 Replacement Procedure 3. Install the top case. NOTE: Be careful not to apply excessive force to the gate TCP. Top case Figure 4-56 Replacing LG.Philips fluorescent lamp (XGA) (7) Satellite A20 Maintenance Manual (960-444) 4-91...

  • Page 310

    4 Replacement Procedure 4.30 Fluorescent Lamp 4. Stick the outside tape and install the cover shield. 1) Stick the tape shield and adhesive tape to fix the top case. NOTE: Be careful not to apply excessive force to the top case. 2) Install the cover shield (C).

  • Page 311

    4.30 Fluorescent Lamp 4 Replacement Procedure NOTE: Be careful not to apply excessive force to the B/L wire. Cover shield (C) Cover shield (G) Adhesive tape Adhesive tape Tape shield Figure 4-57 Replacing LG.Philips fluorescent lamp (XGA) (8) Satellite A20 Maintenance Manual (960-444) 4-93...

  • Page 312

    4 Replacement Procedure 4.30 Fluorescent Lamp 4.30.2 Replacing the 15.0-inch XGA Samsung Fluorescent Lamp Disassembling the 15.0-inch XGA Samsung Fluorescent Lamp To disassemble the 15.0-inch XGA Samsung fluorescent lamp, follow the steps below and refer to figures4-58 to 4-65. 1. Remove the PCB cover. NOTE: When removing the PCB cover, be careful not to damage the COF.

  • Page 313

    4.30 Fluorescent Lamp 4 Replacement Procedure 2. Remove the two screws. Screw Screw Figure 4-59 Replacing Samsung fluorescent lamp (XGA) (2) Satellite A20 Maintenance Manual (960-444) 4-95...

  • Page 314

    4 Replacement Procedure 4.30 Fluorescent Lamp 3. Remove the four screws from the top chassis. Screw Screw Screw Screw Figure 4-60 Replacing Samsung fluorescent lamp (XGA) (3) 4-96 Satellite A20 Maintenance Manual (960-444)

  • Page 315

    4.30 Fluorescent Lamp 4 Replacement Procedure 4. Remove the four bottom hooks and four side hooks (left and right). Then remove the top chassis from the mold frame. Side hook Side hook Bottom hook Figure 4-61 Replacing Samsung fluorescent lamp (XGA) (4) Satellite A20 Maintenance Manual (960-444) 4-97...

  • Page 316

    4 Replacement Procedure 4.30 Fluorescent Lamp 5. Remove the panel assembly from the mold frame. NOTE: When removing the panel assembly, be careful not to damage the COF. Panel assembly Mold frame Figure 4-62 Replacing Samsung fluorescent lamp (XGA) (5) 4-98 Satellite A20 Maintenance Manual (960-444)

  • Page 317

    4.30 Fluorescent Lamp 4 Replacement Procedure 6. Remove the sheets and clips. 1) Remove the two clips fixing the sheets. 2) Remove the sheets (protection sheet, prism sheet (L, U), diffusion sheet, LGP and reflection sheet). Clip Clip Sheets Figure 4-63 Replacing Samsung fluorescent lamp (XGA) (6) Satellite A20 Maintenance Manual (960-444) 4-99...

  • Page 318

    4 Replacement Procedure 4.30 Fluorescent Lamp 7. Remove the lamp back cover. 1) Remove the two screws from the lamp back cover. 2) Remove the lamp back cover. Screw Lamp back cover Screw Figure 4-64 Replacing Samsung fluorescent lamp (XGA) (7) 4-100 Satellite A20 Maintenance Manual (960-444)

  • Page 319

    4.30 Fluorescent Lamp 4 Replacement Procedure 8. Remove the lamp wire from the wire guide of the mold frame. Lamp wire Figure 4-65 Replacing Samsung fluorescent lamp (XGA) (8) Satellite A20 Maintenance Manual (960-444) 4-101...

  • Page 320

    4 Replacement Procedure 4.30 Fluorescent Lamp 9. Remove the lamp assembly from the mold frame. Lamp assembly Mold frame Figure 4-66 Replacing Samsung fluorescent lamp (XGA) (9) 4-102 Satellite A20 Maintenance Manual (960-444)

  • Page 321

    4.30 Fluorescent Lamp 4 Replacement Procedure Assembling the 15.0-inch XGA Samsumg Fluorescent Lamp The assembly procedure of the 15.0-inch XGA Samsung fluorescent lamp is the reverse of the above disassembly procedure. Satellite A20 Maintenance Manual (960-444) 4-103...

  • Page 322

    4 Replacement Procedures 4.30 Fluorescent Lamp 4.30.3 Replacing the 15.0-inch XGA Sharp Fluorescent Lamp Disassembling the 15.0-inch XGA Sharp Fluorescent Lamp To disassemble the 15.0-inch XGA Sharp fluorescent lamp, follow the steps below and refer to figures4-67 to 4-76. 1. Turn the LCD module face down, and remove the protection cover S (A), protection cover G (B), fixing tape (C) and fixing tape for lead wire (C).

  • Page 323

    4.30 Fluorescent Lamp 4 Replacement Procedures 2. Remove the four screws on the sides. Screw loosening torque: 1.2kg cm Screw Screw Screw Screw Figure 4-68 Replacing Sharp fluorescent lamp (XGA) (2) Satellite A20 Maintenance Manual (960-444) 4-105...

  • Page 324

    4 Replacement Procedures 4.30 Fluorescent Lamp 3. Turn the LCD module face up and remove the bezel (E). (3) Release the hook of the bezel from the lamp cover. (E ) Bezel < Side view > Hook (2) Release the two latches (left and (1) Release the bezel from the right) on the P-chassis.

  • Page 325

    4.30 Fluorescent Lamp 4 Replacement Procedures 4. Turn the LCD module face down and remove the two screws fixing the board. Then open the bent portion of the TCP of the board and remove the backlight. Screw loosening torque: 1.2kg cm Screw Screw Figure 4-70 Replacing Sharp fluorescent lamp (XGA) (4)

  • Page 326

    4 Replacement Procedures 4.30 Fluorescent Lamp Do not hold the edge. Do not hold the edge. Raise the board and make this condition. Figure 4-71 Replacing Sharp fluorescent lamp (XGA) (5) 4-108 Satellite A20 Maintenance Manual (960-444)

  • Page 327

    4.30 Fluorescent Lamp 4 Replacement Procedures 5. Turn the LCD module face up and remove the LCD panel (I) from the backlight unit (H). CAUTION: Wear finger sacks or gloves during the work not to soil or scratch the LCD panel or backlight unit. (I) LCD panel (H) Back light unit Figure 4-72 Replacing Sharp fluorescent lamp (XGA) (6)

  • Page 328

    4 Replacement Procedures 4.30 Fluorescent Lamp 6. Turn the backlight unit (H) removed face down and remove the two screws (D) and lamp cover (J). NOTE: Be careful not to scratch or soil the sheets. (H) Backlight unit Screw loosening torque: 1.2kg cm (D) Screw (D) Screw (J ) Lamp cover...

  • Page 329

    4.30 Fluorescent Lamp 4 Replacement Procedures 7. Turn the backlight unit face up and remove the upper diffusion sheet (K), lens sheet (L) and light guide (M). NOTE: Be careful not to scratch or soil the removed sheets or light guide to reuse them.

  • Page 330

    4 Replacement Procedures 4.30 Fluorescent Lamp 8. Remove the four double-sided tapes (N, O, P, Q). NOTE: Discard the removed tapes. Do not reuse them. (N) Double-sided tape 1 (P) Double-sided tape 3 (O) Double-sided tape 2 (Q) Double-sided tape 4 Figure 4-75 Replacing Sharp fluorescent lamp (XGA) (9) 4-112 Satellite A20 Maintenance Manual (960-444)

  • Page 331

    4.30 Fluorescent Lamp 4 Replacement Procedures 9. Turn the backlight unit face down and remove the lamp unit (R) from the P-chassis. CAUTION: When removing the lamp unit, be careful not to break the lamp, or bend the reflection sheet. P-chassis Lamp unit Figure 4-76 Replacing Sharp fluorescent lamp (XGA) (10)

  • Page 332

    4 Replacement Procedures 4.30 Fluorescent Lamp Assembling the 15.0-inch XGA Sharp Fluorescent Lamp To assemble the 15.0-inch Sharp XGA fluorescent lamp, follow the steps below and refer to figures 4-77 to 4-89. 1. Stick the four double-sided tapes (N, O, P, Q) on the P-chassis. Standard for edge of P-chassis Do not make the P-chassis over this line.

  • Page 333

    4.30 Fluorescent Lamp 4 Replacement Procedures 2. Turn the backlight unit face down and install a new lamp unit (R) on the P-chassis. NOTE: When install the lamp unit (R), be careful not to bend or damage the reflection sheet. P-chassis (R) Lamp unit Figure 4-78 Replacing Sharp fluorescent lamp (XGA) (12)

  • Page 334

    4 Replacement Procedures 4.30 Fluorescent Lamp Install the lamp unit without floating. Install the reflection sheet as it is placed inside the reflector. Install the lead wire into this groove. Cross-section drawing of Z-Z Figure 4-79 Replacing Sharp fluorescent lamp (XGA) (13) 4-116 Satellite A20 Maintenance Manual (960-444)

  • Page 335

    4.30 Fluorescent Lamp 4 Replacement Procedures 3. Install the lamp cover (J) on the backlight unit and secure it with the two screws (D). (J ) Lamp cover Screw tightening torque: 1.0kg cm (D) Screw (D) Screw Figure 4-80 Replacing Sharp fluorescent lamp (XGA) (14) Satellite A20 Maintenance Manual (960-444) 4-117...

  • Page 336

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Install the light guide (M) on the backlight unit. Insert the light guide straight not to deform the reflector. Backlight unit (M) Light guide Figure 4-81 Replacing Sharp fluorescent lamp (XGA) (15) 4-118 Satellite A20 Maintenance Manual (960-444)

  • Page 337

    4.30 Fluorescent Lamp 4 Replacement Procedures 5. Place the lens sheet (L) and upper diffusion sheet (K) on the backlight unit with light guide. (K) Upper diffusion sheet (L) Lens sheet (M) Light guide Make sure there is no dust or scratch. Do not make any sheet over the edge of P-chassis.

  • Page 338

    4 Replacement Procedures 4.30 Fluorescent Lamp 6. Place the LCD panel (I) on the backlight unit (H). NOTE: Make sure there is no dust between the LCD panel and backlight unit. If any dust is found, remove it with crepe tape or others which has no remaining of paste.

  • Page 339

    4.30 Fluorescent Lamp 4 Replacement Procedures 7. Bend the TCP attaching to the source board and secure it with the two screws. Do not hold the edge. Do not hold the edge. Figure 4-84 Replacing Sharp fluorescent lamp (XGA) (18) Satellite A20 Maintenance Manual (960-444) 4-121...

  • Page 340

    4 Replacement Procedures 4.30 Fluorescent Lamp Screw Screw Figure 4-85 Replacing Sharp fluorescent lamp (XGA) (19) 4-122 Satellite A20 Maintenance Manual (960-444)

  • Page 341

    4.30 Fluorescent Lamp 4 Replacement Procedures 8. Install the bezel (E) on the lamp cover and hook the four latches on the lamp cover and two latches on the P-chassis. (1) Hitch the hook of the bezel (E ) Bezel on the rib of the P-chassis.

  • Page 342

    4 Replacement Procedures 4.30 Fluorescent Lamp Make sure of mating of the bezel and the rib of the P-chassis. Make sure of mating of the bezel and the latch of the P-chassis. Make sure of mating of the bezel and the latch of the P-chassis. Figure 4-87 Replacing Sharp fluorescent lamp (XGA) (21) 4-124 Satellite A20 Maintenance Manual (960-444)

  • Page 343

    4.30 Fluorescent Lamp 4 Replacement Procedures 9. Secure the sides of the unit with the four screws. Screw Screw Screw Screw Figure 4-88 Replacing Sharp fluorescent lamp (XGA) (22) Satellite A20 Maintenance Manual (960-444) 4-125...

  • Page 344

    4 Replacement Procedures 4.30 Fluorescent Lamp 10. Stick the protection cover G (B), protection cover S (A), fixing tape (C) and fixing tape for lead wire (C). Fit the cover according to the outline of the screw. 0 to 1 mm Do not make the tape over the top of the module.

  • Page 345

    4.30 Fluorescent Lamp 4 Replacement Procedures 4.30.4 Replacing the 15.0-inch XGA CHIMEI Fluorescent Lamp Disassembling the 15.0-inch XGA CHIMEI Fluorescent Lamp To disassemble the 15.0-inch XGA CHIMEI fluorescent lamp, follow the steps below and refer to figures4-90 to 4-95. 1. Remove the CU tape, yellow tape and protector film X. Protector film X CU tape Tape...

  • Page 346

    4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the two screws (B) fixing the X-PCB. Then remove the eight screws (C) fixing the metal frame. Release the two hooks (A). (B) Screw Screw (B) (A) hook Detail (A) (C) Screw (A) hook Figure 4-91 Replacing CHIMEI fluorescent lamp (XGA) (2) 4-128...

  • Page 347

    4.30 Fluorescent Lamp 4 Replacement Procedures 3. Release the latch. NOTE: Remove the metal frame parallel no to damage it. Latch Metal frame Backlight Figure 4-92 Replacing CHIMEI fluorescent lamp (XGA) (3) Satellite A20 Maintenance Manual (960-444) 4-129...

  • Page 348

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Remove the X-PCB. NOTE: When removing the X-PCB, be careful not to damage the TCP. X-PCB Panel Back light unit Figure 4-93 Replacing CHIMEI fluorescent lamp (XGA) (4) 4-130 Satellite A20 Maintenance Manual (960-444)

  • Page 349

    4.30 Fluorescent Lamp 4 Replacement Procedures 5. Remove the three spacers from the BEFIII-M diffuser sheet. Remove the DEFIII-M diffuser sheet, BEFIII-T diffuser sheet and two tapes from the backlight unit in order. NOTE: When removing the sheets, be careful not to damage them. BEFIII-M diffuser sheet BEMIII-T diffuser sheet Spacer...

  • Page 350

    4 Replacement Procedures 4.30 Fluorescent Lamp 6. Remove the two screws. Screw Screw Housing Lamp assembly Figure 4-95 Replacing CHIMEI fluorescent lamp (XGA) (6) 4-132 Satellite A20 Maintenance Manual (960-444)

  • Page 351

    4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 15.0-inch XGA CHIMEI fluorescent lamp To assemble procedure of the 15.0-inch XGA CHIMEI fluorescent lamp, follow the reverse steps of the disassembling steps above. Satellite A20 Maintenance Manual (960-444) 4-133...

  • Page 352

    4 Replacement Procedures 4.30 Fluorescent Lamp 4.30.5 Replacing the 15.0-inch SXGA+ LG.Philips Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.

  • Page 353

    4.30 Fluorescent Lamp 4 Replacement Procedures Cover shield (C) Cover shield (G) Adhesive tape Tape shield Adhesive tape Figure 4-96 Replacing LG.Philips fluorescent lamp (SXGA+) (1) Satellite A20 Maintenance Manual (960-444) 4-135...

  • Page 354

    4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the top case. Be careful not to apply excessive force to the top case or gate TCP. Top case Figure 4-97 Replacing LG.Philips fluorescent lamp (SXGA+) (2) 4-136 Satellite A20 Maintenance Manual (960-444)

  • Page 355

    4.30 Fluorescent Lamp 4 Replacement Procedures 3. Remove the source PCB and gate PCB. 1) Remove the source PCB. Be careful not to apply excessive force to the PCB or TCP when removing double-sided tape. 2) Remove the gate PCB. Be careful not to apply excessive force to the PCB or TCP when removing double-sided tape.

  • Page 356

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Remove the board assembly, adhesive tape, light guide and cover assembly bottom (L). 1) Remove the board assembly. NOTE: This process should be made in a clean room to prevent scratch or particle on polarizer or B/L assembly. 2) Remove the adhesive tape fixing the sheets (four points).

  • Page 357

    4.30 Fluorescent Lamp 4 Replacement Procedures Board assembly Adhesive tape Double-sided tape Adhesive tape Double-sided tape Adhesive tape Adhesive tape Sheets and light guide Screw Cover assembly bottom (L) Screw Figure 4-99 Replacing LG.Philips fluorescent lamp (SXGA+) (4) Satellite A20 Maintenance Manual (960-444) 4-139...

  • Page 358

    4 Replacement Procedures 4.30 Fluorescent Lamp Assembling the 15.0-inch SXGA+ LG.Philips Fluorescent Lamp To assembling the 15.0-inch SXGA+ LG.Philips fluorescent lamp, follow the steps below and refer to figures 4-100 to 4-103. 1. Install the cover assembly bottom (L), sheets, light guide, adhesive tape and board assembly.

  • Page 359

    4.30 Fluorescent Lamp 4 Replacement Procedures Board assembly Adhesive tape Double-sided tape Double-sided tape Adhesive tape Double-sided tape Double-sided tape Adhesive tape Adhesive tape Sheets and light guide Screw Screw Cover assembly bottom (L) Figure 4-100 Replacing LG.Philips fluorescent lamp (SXGA+) (5) Satellite A20 Maintenance Manual (960-444) 4-141...

  • Page 360

    4 Replacement Procedures 4.30 Fluorescent Lamp 2. Install the source PCB and gate PCB. 1) Install the source PCB. Be careful not to apply excessive force to the TCP. 2) Install the gate PCB. Be careful not to apply excessive force to the TCP. Source PCB Gate PCB Figure 4-101 Replacing LG.Philips fluorescent lamp (SXGA+) (6)

  • Page 361

    4.30 Fluorescent Lamp 4 Replacement Procedures 3. Install the top case. Be careful not to apply excessive force to the gate TCP. Top case Figure 4-102 Replacing LG.Philips fluorescent lamp (SXGA+) (7) Satellite A20 Maintenance Manual (960-444) 4-143...

  • Page 362

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Stick the out side tape and cover shield. 1) Install the tape shield and adhesive tape to fix the top case. Be careful not to apply excessive force to the top case. 2) Install the cover shield (C). Be careful not to apply excessive force to the control PCB.

  • Page 363

    4.30 Fluorescent Lamp 4 Replacement Procedures 4.30.6 Replacing the 15.0-inch SXGA+ Samsung Fluorescent Lamp Disassembling the 15.0-inch SXGA+ Samsung Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.

  • Page 364

    4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the two screws securing the PCB. Screw Screw Figure 4-105 Replacing Samsung fluorescent lamp (SXGA+) (2) 4-146 Satellite A20 Maintenance Manual (960-444)

  • Page 365

    4.30 Fluorescent Lamp 4 Replacement Procedures 3. Remove the four screws from the top side of the chassis. Screw Screw Screw Screw Figure 4-106 Replacing Samsung fluorescent lamp (SXGA+) (3) Satellite A20 Maintenance Manual (960-444) 4-147...

  • Page 366

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Remove the four bottom hooks and five hooks (left and right). Then remove the top chassis from the mold frame. CAUTION: When you release hooks on the top chassis, be careful not to apply excessive force to the FL.

  • Page 367

    4.30 Fluorescent Lamp 4 Replacement Procedures 5. Remove the panel assembly from the mold frame. Panel assembly Mold frame Figure 4-108 Replacing Samsung fluorescent lamp (SXGA+) (5) Satellite A20 Maintenance Manual (960-444) 4-149...

  • Page 368

    4 Replacement Procedures 4.30 Fluorescent Lamp 6. Remove the two clips. Then remove the five sheets (prism sheet (L, U), diffusion sheet, LGP and reflection sheet). Clip Sheets Clip Figure 4-109 Replacing Samsung fluorescent lamp (SXGA+) (6) 4-150 Satellite A20 Maintenance Manual (960-444)

  • Page 369

    4.30 Fluorescent Lamp 4 Replacement Procedures 7. Remove the two screws securing the lamp back cover. Then remove the lamp back cover. Lamp back cover Screw Screw Figure 4-110 Replacing Samsung fluorescent lamp (SXGA+) (7) Satellite A20 Maintenance Manual (960-444) 4-151...

  • Page 370

    4 Replacement Procedures 4.30 Fluorescent Lamp 8. Remove the lamp wire from the wire guide of the mold frame. Lamp wire Figure 4-111 Replacing Samsung fluorescent lamp (SXGA+) (8) 4-152 Satellite A20 Maintenance Manual (960-444)

  • Page 371

    4.30 Fluorescent Lamp 4 Replacement Procedures 9. Remove the lamp assembly from the mold frame. Lamp assembly Mold frame Figure 4-112 Replacing Samsung fluorescent lamp (SXGA+) (9) Satellite A20 Maintenance Manual (960-444) 4-153...

  • Page 372

    4 Replacement Procedures 4.30 Fluorescent Lamp Assembling the 15.0-inch SXGA+Samsung Fluorescent Lamp The assembly procedure is the reverse of the above disassembly procedure. 4-154 Satellite A20 Maintenance Manual (960-444)

  • Page 373

    4.30 Fluorescent Lamp 4 Replacement Procedures 4.30.7 Replacing the 15.0-inch SXGA+ Sharp Fluorescent Lamp To disassemble the 15.0-inch SXGA+ Sharp fluorescent lamp, follow the steps below and refer to Figures 4-113 to 4-122. CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module.

  • Page 374

    4 Replacement Procedures 4.30 Fluorescent Lamp 4-156 Satellite A20 Maintenance Manual (960-444)

  • Page 375

    4.30 Fluorescent Lamp 4 Replacement Procedures 2. Remove the four screws on the sides. Screw loosening torque: 1.1kg cm Screw Screw Screw Screw Figure 4-114 Replacing Sharp fluorescent lamp (SXGA+) (2) Satellite A20 Maintenance Manual (960-444) 4-157...

  • Page 376

    4 Replacement Procedures 4.30 Fluorescent Lamp 3. Turn the LCD module face up and remove the bezel (E). (3) Release the hook of the bezel from the lamp cover. (E ) Bezel < Side view > Hook (2) Release the two (1) Release the bezel from the latches on the P-chassis.

  • Page 377

    4.30 Fluorescent Lamp 4 Replacement Procedures 4. Turn the LCD module face down. Remove the four screws fixing the board and remove the FPC (G). Open the bent portion of the TCP of the board and remove the backlight. Screw loosening torque: 0.9kg cm Screw Screw Screw...

  • Page 378

    4 Replacement Procedures 4.30 Fluorescent Lamp Do not hold the edge. Do not hold the edge. Raise the board and make this condition. Figure 4-117 Replacing Sharp fluorescent lamp (SXGA+) (5) 4-160 Satellite A20 Maintenance Manual (960-444)

  • Page 379

    4.30 Fluorescent Lamp 4 Replacement Procedures 5. Turn the LCD module face up and remove the LCD panel (I) from the backlight unit (H). NOTE: Wear finger sacks or gloves during the work not to soil or scratch the LCD panel or backlight unit. Figure 4-118 Replacing Sharp fluorescent lamp (SXGA+) (6) Satellite A20 Maintenance Manual (960-444) 4-161...

  • Page 380

    4 Replacement Procedures 4.30 Fluorescent Lamp 6. Turn the backlight unit (H) removed face down and remove the two screws (D) and lamp cover (J). NOTE: Be careful not to scratch or soil the sheets. Figure 4-119 Replacing Sharp fluorescent lamp (SXGA+) (7) 4-162 Satellite A20 Maintenance Manual (960-444)

  • Page 381

    4.30 Fluorescent Lamp 4 Replacement Procedures 7. Turn the backlight unit face up and remove the upper diffusion sheet (K), lens sheet (L) and light guide (M). NOTE: The light guide and sheets are reused. Be careful not to scratch or soil them.

  • Page 382

    4 Replacement Procedures 4.30 Fluorescent Lamp 8. Remove the four double-sided tapes (N, O, P, Q). NOTE: Discard the removed tapes. Do not reuse them. (N) Double-sided tape 1 (P ) Double-sided tape 3 (O) Double-sided tape 2 (Q) Double-sided tape 4 Figure 4-121 Replacing Sharp fluorescent lamp (SXGA+) (9) 4-164 Satellite A20 Maintenance Manual (960-444)

  • Page 383

    4.30 Fluorescent Lamp 4 Replacement Procedures 9. Turn the backlight unit face down and remove the lamp unit (R) from the P-chassis. CAUTION: When removing the lamp unit, be careful not to break the lamp, or bend the reflection sheet. Figure 4-122 Replacing Sharp fluorescent lamp (SXGA+) (10) Satellite A20 Maintenance Manual (960-444) 4-165...

  • Page 384

    4 Replacement Procedures 4.30 Fluorescent Lamp Assembling the 15.0-inch SXGA+ Sharp Fluorescent Lamp To assemble the 15.0-inch SXGA+ Sharp fluorescent lamp, follow the steps below and refer to Figures 4-123 to 4-137. 1. Stick the four double-sided tapes (N, O, P, Q) on the P-chassis. Standard for edge of P-chassis Do not make the P-chassis over this line.

  • Page 385

    4.30 Fluorescent Lamp 4 Replacement Procedures 2. Turn the backlight unit face down and install a new lamp unit (R) on the P-chassis. P-chassis (R) Lamp unit Figure 4-124 Replacing Sharp fluorescent lamp (SXGA+) (12) Satellite A20 Maintenance Manual (960-444) 4-167...

  • Page 386

    4 Replacement Procedures 4.30 Fluorescent Lamp NOTE: When install the lamp unit, be careful not to bend or damage the reflection sheet. Figure 4-125 Replacing Sharp fluorescent lamp (SXGA+) (13) 4-168 Satellite A20 Maintenance Manual (960-444)

  • Page 387

    4.30 Fluorescent Lamp 4 Replacement Procedures 3. Install the lamp cover (J) on the backlight unit and secure it with the two screws. (J ) Lamp cover (D) Screw (D) Screw Screw tightening torque: 0.9kg cm Figure 4-126 Replacing Sharp fluorescent lamp (SXGA+) (14) Satellite A20 Maintenance Manual (960-444) 4-169...

  • Page 388

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Install the light guide (M) on the backlight unit. Insert the light guide straight not to deform the reflector. (M) Light guide Backlight unit Figure 4-127 Replacing Sharp fluorescent lamp (SXGA+) (15) 4-170 Satellite A20 Maintenance Manual (960-444)

  • Page 389

    4.30 Fluorescent Lamp 4 Replacement Procedures 5. Place the lens sheet (L) and upper diffusion sheet (K) on the backlight unit with light guide. (K) Upper diffusion sheet (L) Lens sheet (M) Light guide Make sure there is no dust or scratch. Do not make any sheet over the edge of P-chassis Figure 4-128 Replacing Sharp fluorescent lamp (SXGA+) (16)

  • Page 390

    4 Replacement Procedures 4.30 Fluorescent Lamp 6. Place the LCD panel (I) on the backlight unit (H). NOTE: Make sure there is no dust between the LCD panel and backlight unit. If any dust is found, remove it with crepe tape or others which has no remaining of paste.

  • Page 391

    4.30 Fluorescent Lamp 4 Replacement Procedures 7. Bend the TCP attaching to the source board and secure it with the two screws. Then bend the TCP attaching to the gate board with the two screws and insert the FPC (G) into the connector of the source board.

  • Page 392: Replacement Procedures

    4 Replacement Procedures 4.30 Fluorescent Lamp Check the condition after mating. *Check the condition of the concave portion of the FPC and the outline of the connector. *Insert the FPC to the end. There shall be no out of position in *Lock surely the connector.

  • Page 393

    4.30 Fluorescent Lamp 4 Replacement Procedures 8. Install the bezel (E) on the lamp cover. Attach the four latches on the lamp cover and two latches on the P-chassis. (E ) Bezel (1) Hitch the hook of the bezel on the rib of the P-chassis. <...

  • Page 394

    4 Replacement Procedures 4.30 Fluorescent Lamp Make sure of mating of the bezel and the rib of the P-chassis. Make sure of mating of the bezel and the latch of the P-chassis. Make sure of mating of the bezel and the latch of the P-chassis. Figure 4-133 Replacing Sharp fluorescent lamp (SXGA+) (21) 4-176 Satellite A20 Maintenance Manual (960-444)

  • Page 395

    4.30 Fluorescent Lamp 4 Replacement Procedures 9. Secure the sides of the unit with the four screws. Screw Screw Screw Screw Figure 4-134 Replacing Sharp fluorescent lamp (SXGA+) (22) Satellite A20 Maintenance Manual (960-444) 4-177...

  • Page 396

    4 Replacement Procedures 4.30 Fluorescent Lamp 10. Stick the protection cover G (B). Outline standard for the gate board (B) Protection cover G Figure 4-135 Replacing Sharp fluorescent lamp (SXGA+) (23) 4-178 Satellite A20 Maintenance Manual (960-444)

  • Page 397

    4.30 Fluorescent Lamp 4 Replacement Procedures 11. Stick the protection cover S (A), fixing tape (C), fixing tape for lead wire (D). Stick to the side of the bezel. Fit the cover according to Fit the cover according to the outline of the screw. the outline of the screw.

  • Page 398

    4 Replacement Procedures 4.30 Fluorescent Lamp Make sure the edge of plastic resin is between 0.5. Edge of plastic resin 0 to 1 mm 0 to 1 mm Standard for the outline of board Standard for the outline of screw (left and right) Figure 4-137 Replacing Sharp fluorescent lamp (SXGA+) (25) 4-180 Satellite A20 Maintenance Manual (960-444)

  • Page 399

    LCD module. Be careful not to let dust or other foreign substances into the LCD module. Disassembling the 14.1-inch XGA TOSHIBA Fluorescent Lamp To disassemble the 14.1-inch XGA TOSHIBA fluorescent lamp, follow the steps below and refer to figures 4-138 to 4-142. Peeling off the tapes and insulation sheets 1.

  • Page 400

    4.30 Fluorescent Lamp 4 Replacement Procedures Figure 4-138 Removing the tape and insulation sheet Removing the screws 1. Spread out the insulation sheet without detaching it from the side of the bezel, as shown in Figure 4-139. 2. In the order (1) and (2) shown in Figure 4-139, remove the screws from the left- and right- hand sides of the module.

  • Page 401

    4 Replacement Procedures 4.30 Fluorescent Lamp Removing the bezel 1. Without removing the insulation tape, flip the module over again so that the display screen can face up. 2. Release the latches of the bezel and frame. (On the sides, there are five latches in the upper area and two latches in the lower area.) 3.

  • Page 402

    4.30 Fluorescent Lamp 4 Replacement Procedures Opening the PCB 1. Spread out the PCB horizontally, as shown in Figure 4-141. CAUTION: Use care not to damage the TAB. Figure 4-141 Spreading out the PCB horizontally Satellite A20 Maintenance Manual (960-444) 4-183...

  • Page 403

    4 Replacement Procedures 4.30 Fluorescent Lamp Removing the PCB-assembly cell 1. Remove the cell of the PCB assembly from the backlight assembly, as indicated by (1) in Figure 4-142. Completely remove the double-sided tape remaining on the reverse side of the cell.

  • Page 404

    4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 14.1-inch XGA TOSHIBA Fluorescent Lamp To assembling the 14.1-inch XGA TOSHIBA fluorescent lamp, follow the steps below and refer to figures 4-143 to 4-149. Putting the double-sided tapes on the bezel 1. Attach the double-sided tape to the reverse side of the bezel, as shown in Figure 4-143.

  • Page 405

    4 Replacement Procedures 4.30 Fluorescent Lamp Checking the backlight 1. Inspect the replacement backlight according to Figure 4-144. Figure 4-144 Inspecting the replacement backlight 4-186 Satellite A20 Maintenance Manual (960-444)

  • Page 406

    4.30 Fluorescent Lamp 4 Replacement Procedures Assembling PCB-assembly cell 1. Remove the paper (coated with a mold release) from the double-sided tape in the three areas on the replacement backlight unit. The areas are at the top and on both sides. See Figure 4-145.

  • Page 407

    4 Replacement Procedures 4.30 Fluorescent Lamp Folding down and temporary fixing of the TAB/PCB 1. Fold down the TAB (PCB) toward the reverse side of the backlight unit, as shown in Figure 4-146. CAUTION: Use care not to damage the TAB. Figure 4-146 Folding down the TAB 4-188 Satellite A20 Maintenance Manual (960-444)

  • Page 408

    4.30 Fluorescent Lamp 4 Replacement Procedures Setting the bezel 1. Start installing the bezel in the upward direction until it stops at the top left corner. NOTE: The GND-CU and lamp reflector on the left-hand side must not go beyond the edges of the bezel.

  • Page 409

    4 Replacement Procedures 4.30 Fluorescent Lamp Fasten screws of the PCB and bezel 1. Fasten the four screws on the left edge in the order (5), (6), (7), and (8) shown in Figure 4- 148. 2. Fasten the four screws on the right edge in the order (1), (2), (3), and (4) shown in Figure 4-148.

  • Page 410

    4.30 Fluorescent Lamp 4 Replacement Procedures Attaching the tapes and insulation sheet 1. Attach the PCB insulation sheet (one location). 2. Attach the tape for the bezel to the bottom area close to the lamp (two locations). 3. Attach the tape for fixing the FL tube cable (one location). CAUTION: When attaching tape and insulation sheet, use care not to damage the TAB and lamp cable connections.

  • Page 411

    4 Replacement Procedures 4.30 Fluorescent Lamp 4.30.9 Replacing the 14.1-inch XGA Sharp Fluorescent Lamp Disassembling the 14.1-inch XGA Sharp Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.

  • Page 412

    4.30 Fluorescent Lamp 4 Replacement Procedures 2. Remove the screws (E) on both sides. Figure 4-151 Removing the screws from the sides 3. Flip the module over again (with the top of the module facing up) and remove the two latches that are close to the lamp.

  • Page 413

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Using the U-shaped edge of the bezel as a "hinge," raise the edge of the bezel from which the latches have been removed. Then remove the bezel. Peel off the tape for GND wire fixing (J).

  • Page 414

    4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 14.1-inch XGA Sharp Fluorescent Lamp To assembling the 14.1-inch XGA Sharp fluorescent lamp, follow the steps below and refer to figures 4-155 to 4-159. 1. Attach the lamp cover (F) and attach the shield tape to the lamp cover after folding it. Then fix the lamp cover with the two screws (E).

  • Page 415

    4 Replacement Procedures 4.30 Fluorescent Lamp 3. Fasten the five screws (E) on both sides. Make sure that the two latches are fitting surely. Figure 4-157 Fastening the screws on both sides 4-196 Satellite A20 Maintenance Manual (960-444)

  • Page 416

    4.30 Fluorescent Lamp 4 Replacement Procedures 4. Attach the protection cover S (A), protection cover G (B), aluminum tape (C), tape for lead fixing (D), and aluminum shield (K). All of which must be new ones. Attach the protection cover (A) then cover (B), using the engaging pins as the guide. Fold the ends of the covers toward the side of the bezel.

  • Page 417

    4 Replacement Procedures 4.30 Fluorescent Lamp 5. Upon completion of the assembly, perform visual inspections, as shown in Figure 4-159. Figure 4-159 Visual inspections 4-198 Satellite A20 Maintenance Manual (960-444)

  • Page 418

    4.30 Fluorescent Lamp 4 Replacement Procedures 4.30.10 Replacing the 14.1-inch XGA Samsung Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.

  • Page 419

    4 Replacement Procedures 4.30 Fluorescent Lamp 2. Remove the two screws for fixing the power supply board. CAUTION: Use care not to damage the PCB. Figure 4-161 Removing the two screws for fixing the power supply board 4-200 Satellite A20 Maintenance Manual (960-444)

  • Page 420

    4.30 Fluorescent Lamp 4 Replacement Procedures 3. Release the 18 hooks and remove the upper chassis from the frame. There are six hooks at the top, four hooks on each of the left- and right-hand sides, and four hooks at the bottom. Figure 4-162 Releasing the 18 hooks Satellite A20 Maintenance Manual (960-444) 4-201...

  • Page 421

    4 Replacement Procedures 4.30 Fluorescent Lamp 4. Remove the panel assembly from the backlight assembly. CAUTION: Use care not to damage the TCP during working. Figure 4-163 Removing the panel assembly 4-202 Satellite A20 Maintenance Manual (960-444)

  • Page 422

    4.30 Fluorescent Lamp 4 Replacement Procedures 5. Remove the two clips. 6. Remove these: Prism sheet Diffuser sheet Light guide plate (LGP) Reflective sheet Figure 4-164 Removing the panel assembly Satellite A20 Maintenance Manual (960-444) 4-203...

  • Page 423

    4 Replacement Procedures 4.30 Fluorescent Lamp 7. Remove the two screws for fixing the back cover of the FL tube. Figure 4-165 Removing the screws for fixing the FL tube back cover 4-204 Satellite A20 Maintenance Manual (960-444)

  • Page 424

    4.30 Fluorescent Lamp 4 Replacement Procedures 8. Disconnect the ground wire of the FL tube from the frame. Figure 4-166 Disconnecting the FL tube ground wire Satellite A20 Maintenance Manual (960-444) 4-205...

  • Page 425

    4 Replacement Procedures 4.30 Fluorescent Lamp 9. Remove the FL tube from the frame. Figure 4-167 Removing the FL tube 4-206 Satellite A20 Maintenance Manual (960-444)

  • Page 426

    4.30 Fluorescent Lamp 4 Replacement Procedures Assembling the 14.1-inch XGA Samsung Fluorescent Lamp To assembling the 14.1-inch XGA Samsung fluorescent lamp, follow the steps below and refer to figures 4-160 to 4-167. 1. Place the FL tube on the correct location in the frame. 2.

  • Page 427

    4 Replacement Procedures 4.30 Fluorescent Lamp 4.30.11 Replacing the 14.1-inch XGA L.G. Philips Fluorescent Lamp Disassembling the 14.1-inch XGA L.G. Philips Fluorescent Lamp CAUTION: When you replace the fluorescent lamp, wear finger covers or gloves to avoid contaminating or damaging the LCD module. Be careful not to let dust or other foreign substances into the LCD module.

  • Page 428

    4.30 Fluorescent Lamp 4 Replacement Procedures Figure 4-168 Removing the outside tape/cover tape Satellite A20 Maintenance Manual (960-444) 4-209...

  • Page 429

    4 Replacement Procedures 4.30 Fluorescent Lamp Removing the control PCB, top case and cover assembly 6. Remove the FPC cable (1) used for the control PCB connecting. CAUTION: Pressure or stress should not be given on the FPC cable. 7. Remove the control PCB (2). CAUTION: At first, move the control PCB to the left 8.

  • Page 430

    4.30 Fluorescent Lamp 4 Replacement Procedures Removing the source PCB and gate PCB 10. Remove the source PCB (1). CAUTION: Pressure or stress should not be given on the PCB and TCP during removing double tape. 11. Remove the gate PCB (2). CAUTION: Pressure or stress should not be given on the PCB and TCP during removing double tape.

  • Page 431

    4 Replacement Procedures 4.30 Fluorescent Lamp Removing the board assembly, tape pad sheet, light guide, cover bottom and lamp assembly 12. Remove the board assembly (1). CAUTION: This process should be made in the clean room with no scratch nor particle on the Polarize and B/L assembly .

  • Page 432

    4.30 Fluorescent Lamp 4 Replacement Procedures Figure 4-171 Removing the board assembly, tape pad sheet, light guide, cover bottom and lamp assembly Satellite A20 Maintenance Manual (960-444) 4-213...

  • Page 433

    4 Replacement Procedures 4.30 Fluorescent Lamp Assembling the 14.1-inch XGA L.G. Philips Fluorescent Lamp To assembling the 14.1-inch XGA L.G. Philips fluorescent lamp, follow the steps below and refer to figures 4-172 to 4-175. Attaching the double tape, lamp assembly, cover bottom, sheets, light guide, tape adhesive and board assembly 1.

  • Page 434

    4.30 Fluorescent Lamp 4 Replacement Procedures Figure 4-172 Attaching the double tape, lamp assembly , cover bottom, sheets, light guide, tape adhesive and board assembly Satellite A20 Maintenance Manual (960-444) 4-215...

  • Page 435

    4 Replacement Procedures 4.30 Fluorescent Lamp Attaching the source PCB and gate PCB Attach the source PCB (1). CAUTION: Stress should not be given on the TCP. 10. Attach the gate PCB (2). CAUTION: Stress should not be given on the TCP. Figure 4-173 Attaching the source PCB and gate PCB 4-216 Satellite A20 Maintenance Manual (960-444)

  • Page 436

    4.30 Fluorescent Lamp 4 Replacement Procedures Attaching the cover bottom, screw, top case, control PCB and FPC 11. Attach the bottom cover and screw (1). CAUTION: Pressure should not be given on the source TCP. 12. Attach the top case (2). CAUTION: Pressure should not be given on the gate TCP.

  • Page 437

    4 Replacement Procedures 4.30 Fluorescent Lamp Attaching the outside tape and cover shield 15. Attach the tape adhesive (1) used for B/L wire fixing. CAUTION: Pressure or stress should not be given on the B/L wire fixing. 16. Attach the tape adhesive (2) used for top case fixing. 17.

  • Page 438

    4.30 Fluorescent Lamp 4 Replacement Procedures Figure 4-175 Attaching the outside tape and cover shield Satellite A20 Maintenance Manual (960-444) 4-219...

  • Page 439

    4 Replacement Procedures 4.30 Fluorescent Lamp 4-220 Satellite A20 Maintenance Manual (960-444)

  • Page 440

    Appendices...

  • Page 441

    Appendices App-ii Satellite A20 Maintenance Manual (960-444)

  • Page 442

    Appendices Appendix Contents Appendix A Handling the LCD Module................A-1 Appendix B Board Layout ....................B-1 System Board Front View ....................1 System Board Back View.....................3 Sound Board Front View....................5 Sound Board Back View....................7 USB Board Front and Back View ................9 Switch Board Front and Back View................10 Appendix C Pin Assignments....................C-1 System Board ........................

  • Page 443

    Appendices C.18 PJ3002 Speaker (Right) Connector (3-pin)............C-17 C.19 PJ3003 Speaker (Left) Connector (2-pin)............. C-17 C.20 PJ4000 USB 0 Connector (4-pin) ................ C-17 C.21 PJ4001 USB 1 Connector (4-pin) ................ C-18 C.22 PJ4002 USB 2 Connector (8-pin) ................ C-18 C.23 PJ4900 Bluetooth Interface Connector (20-pin) ............

  • Page 444

    Appendices Switch Board........................C-27 C.43 PJ2027 System board Interface Connector (10-pin)..........C-27 Appendix D Keyboard Scan/Character Codes ..............D-1 Appendix E Key Layout.......................E-1 United States (US) Keyboard...................E-1 United Kingdom (UK) Keyboard ................E-1 German (GR) Keyboard...................E-2 French (FR) Keyboard.....................E-2 Spanish (SP) Keyboard....................E-3 Italian (IT) Keyboard....................E-3 Scandinavian (SC) Keyboard ...................E-4 Swiss-German (SL) Keyboard .................E-4...

  • Page 445

    Appendices Figures Figure B-1 System board layout (front)..................1 Figure B-2 System board layout (back)..................3 Figure B-3 Sound board layout (front) ...................5 Figure B-4 Sound board layout (back)...................7 Figure B-5 USB board layout (front/back) ................9 Figure B-6 Switch board layout (front/back) ................10 Figure E-1 US keyboard ....................E-1 Figure E-2...

  • Page 446

    Appendices Tables Table B-1 System board ICs and connectors (front)..............2 Table B-2 System board ICs and connectors (back) .............5 Table B-3 Sound board ICs and connectors (front)...............7 Table B-4 Sound board ICs and connectors (back) ............10 Table B-5 USB board ICs and connectors (front/back)............11 Table B-6 Switch board ICs and connectors (front/back)............12 Table C-1...

  • Page 447

    Appendices Table C-22 USB 2 connector pin assignments (8-pin) ............C-18 Table C-23 Bluetooth interface connector pin assignments (20-pin)........C-18 Table C-24 Mini PCI Card interface connector pin assignments (124-pin) ......C-19 Table C-25 Network interface connector pin assignments (8-pin) ........C-21 Table C-26 IEEE1394 interface connector pin assignments (4-pin) ........

  • Page 448

    Appendices Table I-1 MTBF ......................I-1 Satellite A20 Maintenance Manual (960-444) App-ix...

  • Page 449: Appendix A Handling The Lcd Module

    Appendix A Handling the LCD Module Appendices Appendix A Appendix A Handling the LCD Module Precautions for handling the LCD module The LCD module can be easily damaged during assembly or disassembly. Observe the following precautions when handling the LCD module: 1.

  • Page 450

    Appendices Appendix A Handling the LCD module 3. If the panel’s surface gets dirty, wipe it with cotton or a soft cloth. If it is still dirty, try breathing on the surface to create a light condensate and wipe it again. If the surface is very dirty, we recommend a CRT cleaning agent.

  • Page 451

    Appendix A Handling the LCD Module Appendices 5. Glass is used in the panel, so be careful not to drop it or let it strike a hard object, which could cause breakage or cracks. 6. CMOS-LSI circuits are used in the module, so guard against damage from electrostatic discharge.

  • Page 452

    Appendices Appendix A Handling the LCD module 7. Do not expose the module to direct sunlight or strong ultraviolet rays for long periods. 8. Do not store the module at temperatures below specifications. Cold can cause the liquid crystals to freeze, lose their elasticity or otherwise suffer damage. Satellite A20 Maintenance Manual (960-444)

  • Page 453

    Appendix A Handling the LCD Module Appendices 9. Do not disassemble the LCD module. Disassembly can cause malfunctions. 10. If you transport the module, do not use packing material that contains epoxy resin (amine) or silicon glue (alcohol or oxime). These materials can release gas that can damage the panel’s polarization.

  • Page 454

    Appendices Appendix A Handling the LCD module Satellite A20 Maintenance Manual (960-444)

  • Page 455: Appendix B Board Layout

    Appendix B Board Layout Appendices Appendix B Board Layout B.1 System Board Front View Figure B-1 System board layout (front) Satellite A20 Maintenance Manual (960-444)

  • Page 456

    Appendices Appendix B Board Layout Table B-1 System board layout (front) Mark Number Name IC2100 PC Card Power Switch MIC2563A IC5640 TV encoder TVxpress2 IC8972 PSC TMP87PM48V PJ1400 SO-DIMM slot 0 PJ1401 SO-DIMM slot 1 PJ2010 Debug port PJ2200 Mini PCI slot PJ3030 Bluetooth I/F connector PJ3230...

  • Page 457

    Appendix B Board Layout Appendices B.2 System Board Back View Figure B-2 System board layout (back) Satellite A20 Maintenance Manual (960-444)

  • Page 458

    Appendices Appendix B Board Layout Table B-2 System board layout (back) Mark Number Name IC1000 Clock Generator ICS951104 IS1050 CPU Socket IC1150 Thermal Sensor ADM1032AR IC1200 North Bridge M1672 IC1600 South Bridge M1535+ IC1671 RTC bq3285LDSS IC1690 BIOS ROM MF400A IC1810 CD Play Controller OZ168 IC2000...

  • Page 459

    Appendix B Board Layout Appendices (AF) X8970 4MHz clock (for PSC) Satellite A20 Maintenance Manual (960-444)

  • Page 460

    Appendices Appendix B Board Layout B.3 Sound Board Front View Figure B-3 Sound board layout (front) Table B-3 Sound board layout (front) Mark Number Name IC6000 Sound CODEC AD1981B X6000 24.576MHz clock (for AD1981B) Satellite A20 Maintenance Manual (960-444)

  • Page 461

    Appendix B Board Layout Appendices B.4 Sound Board Back View Figure B-4 Sound board layout (back) Satellite A20 Maintenance Manual (960-444)

  • Page 462

    Appendices Appendix B Board Layout Table B-4 Sound board layout (back) Mark Number Name PJ2130 SD Card Slot PJ3010 MDC I/F connector PJ6000 External Microphone jack PJ6001 Line In jack PJ6004 Headphone jack PJ9600 System board (FSNAM*) I/F connector PJ9601 System board (FSNAM*) I/F connector DS2120 SD Card LED...

  • Page 463

    Appendix B Board Layout Appendices B.5 USB Board Front and Back View Figure B-5 USB board layout (front/back) Table B-5 USB board ICs and connectors (front/back) Mark Number Name PJ9610 System board (FSNAM*) I/F connector IC3520 FIR module DS3270 Wireless communication LED S3270 Wireless communication switch Satellite A20 Maintenance Manual (960-444)

  • Page 464: Appendix C Pin Assignments

    Apx.C Pin Assignments Appendices Appendix C Appendix C Pin Assignments System Board FSNAM* PJ1400 Memory 1 Connector (200-pin) Table C-1 PJ1400 Memory 1 connector pin assignments (200-pin) (1/3) Pin No. Signal name Pin No. Signal name MR1R25-B1V MR1R25-B1V SDQ01R-B2P SDQ06R-B2P SDQ00R-B2P SDQ02R-B2P 2R5-B2V...

  • Page 465

    Appendices Apx.C Pin Assignments Table C-1 PJ1400 Memory 1 connector pin assignments (200-pin) (2/3) Pin No. Signal name Pin No. Signal name SDQ28R-B2P SDQ26R-B2P SDQ24R-B2P SDQ27R-B2P 2R5-B2V 2R5-B2V SCB0R-B2P SCB4R-B2P SCB1R-B2P SCB5R-B2P SDQS8R-B2P SDQM8R-B2P SCB2R-B2P SCB6R-B2P 2R5-B2V 2R5-B2V SCB3R-B2P SCB7R-B2P SCK0-P2P SCK0-P2N 2R5-B2V...

  • Page 466

    Apx.C Pin Assignments Appendices Table C-1 PJ1400 Memory 1 connector pin assignments (200-pin) (3/3) Pin No. Signal name Pin No. Signal name SDQ33R-B2P SDQ39R-B2P SDQ41R-B2P SDQ46R-B2P 2R5-B2V 2R5-B2V SDQ42R-B2P SDQ40R-B2P SDQS5R-B2P SDQM5R-B2P SDQ44R-B2P SDQ47R-B2P SDQ45R-B2P SDQ43R-B2P 2R5-B2V 2R5-B2V 2R5-B2V SCK2-P2N SCK2-P2P SDQ48R-B2P SDQ50R-B2P...

  • Page 467

    Appendices Apx.C Pin Assignments PJ1401 Memory 2 Connector (200-pin) Table C-2 PJ1401 Memory 2 connector pin assignments (200-pin) (1/3) Pin No. Signal name Pin No. Signal name MR1R25-B1V MR1R25-B1V SDQ01R-B2P SDQ06R-B2P SDQ00R-B2P SDQ02R-B2P 2R5-B2V 2R5-B2V SDQS0R-B2P SDQM0R-B2P SDQ05R-B2P SDQ07R-B2P SDQ04R-B2P SDQ03R-B2P SDQ13R-B2P SDQ14R-B2P...

  • Page 468

    Apx.C Pin Assignments Appendices Satellite A20 Maintenance Manual (960-444)

  • Page 469

    Appendices Apx.C Pin Assignments Table C-2 PJ1401 Memory 2 connector pin assignments (200-pin) (2/3) Pin No. Signal name Pin No. Signal name SCB1R-B2P SCB5R-B2P SDQS8R-B2P SDQM8R-B2P SCB2R-B2P SCB6R-B2P 2R5-B2V 2R5-B2V SCB3R-B2P SCB7R-B2P SCK3-P2P SCK3-P2N 2R5-B2V 2R5-B2V 2R5-B2V SCKE1R-B2P SCKE0R-B2P SMA12R-B2P SMA11R-B2P SMA09R-B2P SMA08R-B2P...

  • Page 470

    Apx.C Pin Assignments Appendices SDQS5R-B2P SDQM5R-B2P Satellite A20 Maintenance Manual (960-444)

  • Page 471

    Appendices Apx.C Pin Assignments Table C-2 PJ1401 Memory 2 connector pin assignments (200-pin) (3/3) Pin No. Signal name Pin No. Signal name SDQ44R-B2P SDQ47R-B2P SDQ45R-B2P SDQ43R-B2P 2R5-B2V 2R5-B2V 2R5-B2V SCK5-P2N SCK5-P2P SDQ48R-B2P SDQ50R-B2P SDQ52R-B2P SDQ54R-B2P 2R5-B2V 2R5-B2V SDQS6R-B2P SDQM6R-B2P SDQ53R-B2P SDQ51R-B2P SDQ49R-B2P SDQ55R-B2P...

  • Page 472

    Apx.C Pin Assignments Appendices PJ1800 HDD Interface Connector (44-pin) Table C-3 HDD interface connector pin assignments (44-pin) Pin No. Signal name Pin No. Signal name IDRSTA-P5N PDD07-P3P PDD08-P3P PDD06-P3P PDD09-P3P PDD05-P3P PDD10-P3P PDD04-P3P PDD11-P3P PDD03-P3P PDD12-P3P PDD02-P3P PDD13-P3P PDD01-P3P PDD14-P3P PDD00-P3P PDD15-P3P PDDREQ-P3P...

  • Page 473

    Appendices Apx.C Pin Assignments PJ1820 ODD Interface Connector (50-pin) Table C-4 ODD interface connector pin assignments (50-pin) Pin No. Signal name Pin No. Signal name CDAUDL-EXP CDAUDR-EXP CD-GND IDRSTB-E5N SDD08-E5P SDD07-E5P SDD09-E5P SDD06-E5P SDD10-E5P SDD05-E5P SDD11-E5P SDD04-E5P SDD12-E5P SDD03-E5P SDD13-E5P SDD02-E5P SDD14-E5P SDD01-E5P...

  • Page 474

    Apx.C Pin Assignments Appendices PJ2110 PC Card Interface Connector (68-pin) Table C-6 PC-Card interface connector pin assignments (68-pin) Pin No. Signal name Pin No. Signal name ACAD00-BYP ACAD01-BYP ACAD03-BYP ACAD05-BYP ACAD07-BYP ACCBE0-BYN ACAD09-BYP ACAD11-BYP ACAD12-BYP ACAD14-BYP ACCBE1-BYN ACPAR-BYP ACPERR-BYN ACGNT-BYN ACINT-BYN MCVCCA-BYV MCVPPA-BYV...

  • Page 475

    Appendices Apx.C Pin Assignments PJ2200 Mini PCI Card Interface Connector (124-pin) Table C-7 Mini PCI card interface connector pin assignments (124-pin) (1/2) Pin No. Signal name Pin No. Signal name WLON-S3N PINTD-P3N PINTA-P3N X33MPC-P3P PCIRST-S3N PREQ2-P3N PGNT2-P3N AD31-P3P PME-S3N AD29-P3P AD30-P3P AD27-P3P AD25-P3P...

  • Page 476

    Apx.C Pin Assignments Appendices Table C-7 Mini PCI interface connector pin assignments (124-pin) (2/2) Pin No. Signal name Pin No. Signal name PERR-P3N DEVSEL-P3N CBE1-P3N AD14-P3P AD15-P3P AD13-P3P AD12-P3P AD11-P3P AD10-P3P AD09-P3P AD08-P3P CBE0-P3N AD07-P3P AD06-P3P AD05-P3P AD04-P3P AD02-P3P AD03-P3P AD00-P3P AD01-P3P Satellite A20 Maintenance Manual (960-444)

  • Page 477

    Appendices Apx.C Pin Assignments PJ4900 Bluetooth Interface Connector (20-pin) Table C-8 Bluetooth interface connector pin assignments (20-pin) Pin No. Signal name Pin No. Signal name BTMDL-P3N BTRST-S3N BTIFIOF-S3N USBDP2-B3P USBDM2-B3N BT-P3V PJ3230 Keyboard Interface Connector (34-pin) Table C-9 Keyboard interface connector pin assignments (34-pin) Pin No.

  • Page 478

    Apx.C Pin Assignments Appendices C.10 PJ3240 Touch Pad Interface Connector (8-pin) Table C-10 Touch Pad interface connector pin assignments (8-pin) Pin No. Signal name Pin No. Signal name IPDCLK-P5P IPDDAT-P5P C.11 PJ3260 Membrane interface Connector (24-pin) Table C-11 Membrane interface connector pin assignments (24-pin) Pin No.

  • Page 479

    Appendices Apx.C Pin Assignments C.12 PJ3510 Parallel Interface Connector (25-pin) Table C-12 Parallel interface connector pin assignments (25-pin) Pin No. Signal name Pin No. Signal name STROB-P5N PDB00-P5P PDB01-P5P PDB02-P5P PDB03-P5P PDB04-P5P PDB05-P5P PDB06-P5P PDB07-P5P ACK-P5N BUSY-P5P PE-P5P SELCT-P5P AUTFD-P5N ERROR-P5N PINIT-P5N SLIN-P5N...

  • Page 480

    Apx.C Pin Assignments Appendices C.14 PJ4600 USB Connector (12-pin) Table C-14 USB connector pin assignments (12-pin) Pin No. Signal name Pin No. Signal name USBP0V-E5V USBDM1-B3N USBDP1-B3P USBP0V-E5V USBDM3-B3N USBDP3-B3P USBP1V-E5V USBDM5-B3N USBDP5-B3P C.15 PJ5600 LCD 0 Interface Connector (20-pin) Table C-15 LCD 0 interface connector pin assignments (20-pin) Pin No.

  • Page 481

    Appendices Apx.C Pin Assignments C.16 PJ5601 LCD 1 Interface Connector (20-pin) Table C-16 LCD 1 interface connector pin assignments (20-pin) Pin No. Signal name Pin No. Signal name TXCK0-B3N TXCK0-B3P TXDT0-B3N TXDT0-B3P TXDT1-B3N TXDT1-B3P TXDT2-B3N TXDT2-B3P TXCK1-B3N TXCK1-B3P TXDT4-B3N TXDT4-B3P TXDT5-B3N TXDT5-B3P TXDT6-B3N...

  • Page 482

    Apx.C Pin Assignments Appendices C.19 PJ8770 Fan 0 Interface Connector (3-pin) Table C-19 Fan 0 interface connector pin assignments (3-pin) Pin No. Signal name Pin No. Signal name FANVCC FANG1-P3P C.20 PJ8800 DC-IN Connector (4-pin) Table C-20 DC-IN connector pin assignments (4-pin) Pin No.

  • Page 483

    Appendices Apx.C Pin Assignments C.23 PJ9510 FSNAS* Board Interface Connector (18-pin) Table C-23 FSNAS* board interface connector pin assignments (18-pin) Pin No. Signal name Pin No. Signal name SNDON-S5N SND-GND SND-GND SND-GND SND-GND PVON-S5P SND-E5V SND-E5V SND-E5V SND-E5V C-20 Satellite A20 Maintenance Manual (960-444)

  • Page 484

    Apx.C Pin Assignments Appendices C.24 PJ9511 Sound Board 1 Interface Connector (50-pin) Table C-24 Sound board 1 interface connector pin assignments (50-pin) Pin No. Signal name Pin No. Signal name SPKOTR-EXN SPKOTR-EXN SPKOTR-EXP SPKOTR-EXP SPKOTL-EXP SPKOTL-EXP SPKOTL-EXN SPKOTL-EXN CD-GND CDAUDR-EXP CD-GND CDAUDL -EXP CD-GND...

  • Page 485

    Appendices Apx.C Pin Assignments C.26 PJ9513 Speaker (Left) Connector (2-pin) Table C-26 Speaker (Left) Connector pin assignments (2-pin) Pin No. Signal name Pin No. Signal name SPKOTL-EXP SPKOTL-EXN C.27 PJ9900 Fan 1 Interface Connector (3-pin) Table C-27 Fan 1 interface connector pin assignments (3-pin) Pin No.

  • Page 486

    Apx.C Pin Assignments Appendices Sound Board FSNAS* C.29 PJ2130 SD Card Interface Connector (12-pin) Table C-29 SD card interface connector pin assignments (12-pin) Pin No. Signal name Pin No. Signal name SDAT3-B3P SDCMD-B3P SD-B3V SDCLK-B3P SDAT0-B3P SDAT1-B3P SDAT2-B3P SDCD-B3N SDWP-B3P C.30 PJ3010 MDC Interface Connector (30-pin) Table C-30 MDC interface connector pin assignments (30-pin)

  • Page 487

    Appendices Apx.C Pin Assignments C.31 PJ6000 External Microphone Connector (6-pin) Table C-31 External microphone connector pin assignments (6-pin) Pin No. Signal name Pin No. Signal name A-GND MICIN-PXP REFV-P2V A-GND A-GND C.32 PJ6001 Line IN Connector (6-pin) Table C-32 Line IN connector pin assignments (6-pin) Pin No.

  • Page 488

    Apx.C Pin Assignments Appendices C.34 PJ9600 System Board 1 Interface Connector (50-pin) Table C-34 System Board 1 interface connector pin assignments (50-pin) Pin No. Signal name Pin No. Signal name SPKOTR-EXN SPKOTR-EXN SPKOTR-EXP SPKOTR-EXP SPKOTL-EXP SPKOTL-EXP SPKOTL-EXN SPKOTL-EXN CD-GND CDAUDR-EXP CD-GND CDAUDL-EXP CD-GND...

  • Page 489

    Appendices Apx.C Pin Assignments C.35 PJ9601 Sound Board 2 Interface Connector (18-pin) Table C-35 Sound board 2 interface connector pin assignments (18-pin) Pin No. Signal name Pin No. Signal name SNDON-S5N SND-GND SND-GND SND-GND SND-GND PVON-S5P SND-E5V SND-E5V SND-E5V SND-E5V C-26 Satellite A20 Maintenance Manual (960-444)

  • Page 490

    Apx.C Pin Assignments Appendices FIR Board FSNAF* C.36 PJ2902 System Board 2 Interface Connector (18-pin) Table C-36 System Board 2 interface connector pin assignments (18-pin) Pin No. Signal name Pin No. Signal name BTSWON-S3P BTLED-S3P FIRMDL-P3N FIR-GND FIR-GND FIR-GND FIR-GND IRTX-P3P IRMODE-P3P IRRX-P3N...

  • Page 491

    Appendices Apx.C Pin Assignments C-28 Satellite A20 Maintenance Manual (960-444)

  • Page 492

    Appendix D Keyboard Scan/Character codes Appendices Appendix D Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes (set 1 and set 2) (1/4) Code set 1 Code set 2 Keytop Note Make Break Make Break ‘ ~ 7 & BkSp Satellite A20 Maintenance Manual (960-444)

  • Page 493

    Appendices Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes (set 1 and set 2) (2/4) Code set 1 Code set 2 Keytop Note Make Break Make Break Caps Lock ‘ “ Enter Shift (L) No.102 , < . > Shift (R) Satellite A20 Maintenance Manual (960-444)

  • Page 494

    Appendix D Keyboard Scan/Character Codes Appendices Table D-1 Scan codes (set 1 and set 2) (3/4) Code set 1 Code set 2 Keytop Note Make Break Make Break Ctrl Alt (L) Space ALT (R) Home PgUp PgDn Satellite A20 Maintenance Manual (960-444)

  • Page 495

    Appendices Appendix D Keyboard Scan/Character Codes Table D-1 Scan codes (set 1 and set 2) (4/4) Code set 1 Code se t 2 Keytop Note Make Break Make Break PrintSc Pause — — — — Notes: 1. * Scan codes differ by mode. 2.

  • Page 496

    Appendix D Keyboard Scan/Character Codes Appendices Table D-2 Scan codes with left Shift key Code set 1 Code set 2 Make Break Make Break E0 AA E0 35 E0 B5 E0 2A E0 F0 12 E0 4A E0 F0 4A E0 12 E0 AA E0 52 E0 D2 E0 2A E0 F0 12 E0 70 E0 F0 70 E0 12...

  • Page 497

    Appendices Appendix D Keyboard Scan/Character Codes Table D-3 Scan codes in Numlock mode Code set 1 Code set 2 Make Break Make Break E0 2A E0 52 E0 D2 E0 AA E0 12 E0 70 E0 F0 70 E0 F0 12 E0 2A E0 53 E0 D3 E0 AA E0 12...

  • Page 498

    Appendix D Keyboard Scan/Character Codes Appendices Table D-5 Scan codes in overlay mode Code set 1 Code set 2 Keytop Make Break Make Break (–) Table D-6 No.124 key scan code Code set 1 Code set 2 Shift Make Break Make Break Prt Sc...

  • Page 499

    Appendices Appendix D Keyboard Scan/Character Codes Table D-7 No.126 key scan code Shift Code set 1 Code set 2 Make Make Pause Common* E1 1D E1 F0 Ctrl* E0 46 E0 F0 *: This key generates only make codes. Satellite A20 Maintenance Manual (960-444)

  • Page 500: Appendix E Key Layout

    Appendix E Key Layout Appendices Appendix E Key Layout E.1 United States (US) Keyboard Figure E-1 US keyboard E.2 United Kingdom (UK) Keyboard Figure E-2 UK keyboard Satellite A20 Maintenance Manual (960-444)

  • Page 501

    Appendices Appendix E Key Layout E.3 German (GR) Keyboard Figure E-3 GR keyboard E.4 French (FR) Keyboard Figure E-4 FR keyboard Satellite A20 Maintenance Manual (960-444)

  • Page 502

    Appendix E Key Layout Appendices E.5 Spanish (SP) Keyboard Figure E-5 SP keyboard E.6 Italian (IT) Keyboard Figure E-6 IT keyboard Satellite A20 Maintenance Manual (960-444)

  • Page 503

    Appendices Appendix E Key Layout E.7 Scandinavian (SC) Keyboard Figure E-7 SC keyboard E.8 Swiss-German (SL) Keyboard Figure E-8 SL keyboard Satellite A20 Maintenance Manual (960-444)

  • Page 504

    Appendix E Key Layout Appendices E.9 Canadian (CS) Keyboard Figure E-9 CS keyboard Satellite A20 Maintenance Manual (960-444)

  • Page 505

    Appendices Appendix E Key Layout Satellite A20 Maintenance Manual (960-444)

  • Page 506: Appendix F Wiring Diagrams

    Appendix F Wiring Diagrams Appendices Appendix F Appendix F Wiring Diagrams Parallel Port Wraparound Connector -SELECT Figure F-1 Parallel port wraparound connector RJ45 Wraparound Connector (1) TDP (3) RDP (2) TDN (6) RDN Figure F-2 RJ45 wraparound connector Satellite A20 Maintenance Manual (960-444)

  • Page 507

    Appendices Appendix F Wiring Diagrams Satellite A20 Maintenance Manual (960-444)

  • Page 508

    Appendix G BIOS Rewrite Procedures Appendices Appendix G Appendix G BIOS Rewrite Procedures This Appendix explains how to rewrite the system BIOS program when you update the system BIOS. Tools To rewrite the BIOS, you need the following tool: q BIOS/EC/KBC rewriting disk for the computer that has renewed BIOS data. Rewriting the BIOS 1.

  • Page 509

    Appendices Appendix G BIOS Rewrite Procedures Satellite A20 Maintenance Manual (960-444)

  • Page 510

    Appendix H EC/KBC Rewrite Procedures Appendices Appendix H Appendix H EC/KBC Rewrite Procedures This Appendix explains how to rewrite the EC/KBC system program when you update the EC/KBC system. Tools To rewrite the EC/KBC, you need the following tool: q BIOS/EC/KBC rewriting disk for the computer Rewriting the EC/KBC NOTE: 1.

  • Page 511

    Appendices Appendix H EC/KBC Rewrite Procedures Satellite A20 Maintenance Manual (960-444)

  • Page 512

    Appendix I Reliability Appendices Appendix I Appendix I Reliability The following table shows MTBF (Mean Time Between Failures) for each component. Table I-1 MTBF Component Time (hours) 50,000 Keyboard 40,000 300,000 USB FDD 43,800 DVD-RAM drive 60,000 CD-RW/DVD-ROM drive 60,000 AC adaptor 20,000 Satellite A20 Maintenance Manual (960-444)

  • Page 513

    Appendices Appendix I Reliability Satellite A20 Maintenance Manual (960-444)

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