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Toshiba Satellite P20-25 Series Maintenance Manual
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Toshiba Satellite P20-25 Series Maintenance Manual

Toshiba Satellite P20-25 Series Maintenance Manual

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Toshiba Personal Computer
Satellite P20-25 Series
Maintenance Manual
TOSHIBA CORPORATION

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Summary of Contents for Toshiba Satellite P20-25 Series

  • Page 1 Toshiba Personal Computer Satellite P20-25 Series Maintenance Manual TOSHIBA CORPORATION...
  • 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 Preface This maintenance manual describes how to perform hardware service maintenance for the Toshiba Personal Computer Satellite P20 Series, referred to as the P20-25 Series in this manual. The procedures described in this manual are intended to help service technicians isolate faulty Field Replaceable Units (FRUs) and replace them in the field.
  • Page 4 Chapter 4 Replacement Procedures describes the removal and replacement of the FRUs. Appendices The appendices describe the following: Handling the LCD module Board layout Pin assignments Keyboard scan/character codes Key layout Screw torque list Reliability Satellite P20-25 Series Maintenance Manual...
  • Page 5 Text that you are instructed to type in is shown in the boldface type below: DISKCOPY A: B: The display Text generated by the computer that appears on its display is presented in the type face below: Format complete System transferred Satellite P20-25 Series Maintenance Manual...
  • Page 6 Satellite P20-25 Series Maintenance Manual...

  • Page 7: Table Of Contents

    2.11 Speaker Troubleshooting ..................2-28 2.12 Optical Drive Troubleshooting ................2-30 2.13 Modem Troubleshooting..................2-33 2.14 PCMCIA Troubleshooting..................2-35 2.15 IEEE 1394 Troubleshooting ..................2-37 2.16 Wireless LAN Troubleshooting................2-39 2.17 Bluetooth Troubleshooting ..................2-41 Satellite P20-25 Series Maintenance Manual...
  • Page 8 3.14 LCD Pixels Mode Test..................... 3-20 3.15 Lid Switch Test ......................3-21 3.16 HDD R/W Test ......................3-22 3.17 LAN Test ......................... 3-24 3.18 RTC Test........................3-26 3.19 CD Control Button Test ................... 3-27 viii Satellite P20-25 Series Maintenance Manual...
  • Page 9 4.23 Direct play LED board....................66 4.24 Audio Board........................ 68 4.25 Speakers ........................70 4.26 Fan Set ........................72 4.27 Display Mask ......................75 4.28 FL Inverter Board ....................... 77 4.29 LCD Module ....................... 80 Satellite P20-25 Series Maintenance Manual...
  • Page 10 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 Series Screw Torque List ................F-1 Appendix G Reliability...................... G-1 Satellite P20-25 Series Maintenance Manual...
  • Page 11 Chapter 1 Hardware Overview...
  • Page 12 1 Hardware Overview 1-ii Satellite P20-25 Series Maintenance Manual...
  • Page 13 Removable Drives......................9 1.4.1 3.5-inch Floppy Disk Drive................9 1.4.2 DVD-R/-RW Drive ..................10 1.4.3 DVD-ROM Drive..................11 1.4.4 DVD Multi-Drive..................12 1.4.5 Combo Drive ....................13 Power Supply ......................14 Batteries ........................16 1.6.1 Main Battery....................16 1.6.2 RTC battery....................18 Satellite P20-25 Series Maintenance Manual 1-iii...
  • Page 14 1 Hardware Overview 1-iv Satellite P20-25 Series Maintenance Manual...
  • Page 15 1.1 Features 1 Hardware Overview Features The Satellite P20-25 Series Personal Computer uses extensive Large Scale Integration (LSI), and Complementary Metal-Oxide Semiconductor (CMOS) technology extensively to provide compact size, minimum weight and high reliability. This computer incorporates the following features and benefits: Intel Desktop P4 up to 2.4GHZ or Northwood upgradable...
  • Page 16 • 17.1-inch WXGA TFT screen, 1440×900 pixels, Response time 31ms (typ.); Contrast ratio 300:1 (typ.); Brightness 160 Nit (typ.) Optional devices • 64MB/128MB/256MB/512MB SO-DIMM modules • MINI PCI module(802.11b wireless LAN module) • Modem with MDC solution module Satellite P20-25 Series Maintenance Manual...
  • Page 17 The PC Card Slot accommodates two 5mm cards (Type II) or one 10.5mm (Type III) card and supports SRAM, OTPROM, FLASH ROM, and mask ROM memory cards up to 64MB as well as MODEM/LAN cards, ATA cards and Card bus cards. ACPI 1.0b compliant. Satellite P20-25 Series Maintenance Manual...
  • Page 18 CD/Digital Mode Button briefly to switch between CD mode and digital mode. CDs can be played with the computer turned off. Pressing play in digital mode will start the computer and launch the digital music player application. Satellite P20-25 Series Maintenance Manual...

  • Page 19: System Unit

    – FAN revolutions rate control – General Input/Output port control – Docker power supply control – Battery capacity check – Flash rewriting – Detection of abnormal condition – EC I/F – I2C Communication – EC access Satellite P20-25 Series Maintenance Manual...
  • Page 20 • DVD- and HDTV-ready MPEG-2 decoding up to 1920x1080i resolutions • Most comprehensive MPEG-2 hardware decode functionality, including Inverse Quantization, Inverse Discrete Cosine Transform, Motion Compensation and Color-Space- Conversion • VIP1.1 interface support for Analog Video In/Out functionality Satellite P20-25 Series Maintenance Manual...

  • Page 21: Features

    – S/PDIF Digital Audio Output – CrystalClear ® 3D Stereo Enhancement Super I/O • One LPC47N227 chip is used. • This gate array has the following features: − Floppy Disk Controller − Parallel Port Controller Satellite P20-25 Series Maintenance Manual...

  • Page 22: Inch Hard Disk Drive

    2.5-inch Hard Disk Drive The internal HDD is a random access non-volatile storage device. It has a non-removable 2.5-inch magnetic disk and mini-Winchester type magnetic heads. The computer supports a 30 / 40 / 60 / 80GB HDD. Satellite P20-25 Series Maintenance Manual...

  • Page 23: Removable Drives

    2DD and 1.44MB (formatted) 2HD disks. The specifications for the FDD are listed in the table below. Item 2MB mode 1MB mode Storage capacity (KB) Unformatted 2,000 1,000 Formatted 1,440 Number of heads Number of cylinders Recording method Modified Frequency Modulation (MFM) Satellite P20-25 Series Maintenance Manual...

  • Page 24: Dvd-R/-Rw Drive

    1 Hardware Overview 1.4 Removable Drives 1.4.2 DVD-R/-RW Drive The DVD-R/-RW drive (Toshiba SD-R6112) accommodates either 12cm (4.72-inch) or 8cm (3.15-inch) CDs or DVDs. Read speeds DVD-ROM Maximum 8 times faster rotational speed DVD-RAM Standard rotational speed CD-ROM Maximum 24 times faster rotational speed...

  • Page 25: Dvd-Rom Drive

    1.4 Removable Drives 1 Hardware Overview 1.4.3 DVD-ROM Drive The DVD-ROM drive (Toshiba SD-C2612 or Matsushita SR-8177) accommodates either 12cm (4.72-inch) or 8cm (3.15-inch) CDs or DVDs. Transfer rates Matsushita SR-8177: The DVD-ROM drive is able to read CD-ROM, CD-R data at 10.3X to 24X CAV mode speed and CD-RW data at 5.1X to 12X CAV mode...

  • Page 26: Dvd Multi-Drive

    16.6 MB/s :Multi word mode2 Ultra DMA mode 33.3 MB/s :Ultra DMA mode2 Buffer Memory Supported formats CD-DA CD-ROM CD-R/W CD-R CD-ROMXA CD-I Ready Video CD PhotoCD(multi-session) Cd-Extra(CD+) CD-TEXT DVD: DVD-Video DVD-ROM DVD-R(3.9GB, 4.7GB) DVD-RAM DVD-RW(Ver.1.1) 1-12 Satellite P20-25 Series Maintenance Manual...

  • Page 27: Combo Drive

    1.4 Removable Drives 1 Hardware Overview 1.4.5 Combo Drive The CD-RW/DVD-ROM combo drive (Toshiba SD-R2412 or TEAC DW-224E-85) is capable of driving either 12cm (4.72-inch) or 8cm (3.15-inch) DVDs and CDs without using an adaptor. Read speeds DVD-ROM Maximum 8 times faster rotational speed...

  • Page 28: Power Supply

    The EC controls the following two kinds of LED DC IN LED (one color: green) • Green = indicates AC adaptor is connected Battery LED (two colors: orange and green) • Green solid = The battery is fully charged. 1-14 Satellite P20-25 Series Maintenance Manual...
  • Page 29 When a new battery is installed, the EC communicates with the E PROM in the battery to read information of the newly installed battery. 10. Battery capacity calculation The EC reads battery remaining and percentage capacity from the battery through SMBus. Satellite P20-25 Series Maintenance Manual 1-15...

  • Page 30: Batteries

    The times required for charges are listed in the table below. Status Charging time Normal charge (power on) 12 hours or longer Quick charge (power off) About 4 hours 1-16 Satellite P20-25 Series Maintenance Manual...

  • Page 31: Power Supply

    2. The AC adaptor or battery is removed. 3. The battery or output voltage is abnormal. 4. The battery temperature is abnormal. 5. The battery SMBus communication fails. 6. The battery cell is bad. Satellite P20-25 Series Maintenance Manual 1-17...

  • Page 32: Rtc Battery

    RTC battery. The RTC battery is charged by the adaptor or main battery, while the computer is powered on. Status Time Charging Time (power on) About 48 hours Data preservation period (full charge) 2 month 1-18 Satellite P20-25 Series Maintenance Manual...

  • Page 33: Batteries

    1.6 Batteries 1 Hardware Overview Satellite P20-25 Series Maintenance Manual 1-19...
  • Page 34 Chapter 2 Troubleshooting Procedures...
  • Page 35 2 Troubleshooting Procedures 2-ii Satellite P20-25 Series Maintenance Manual...

  • Page 36: Troubleshooting Introduction

    Speaker Troubleshooting ..................2-27 2.12 Optical Drive Troubleshooting ................2-29 2.13 Modem Troubleshooting..................2-32 2.14 PCMCIA Troubleshooting..................2-34 2.15 IEEE 1394 Troubleshooting ..................2-36 2.16 Wireless LAN Troubleshooting................2-38 2.17 Bluetooth Troubleshooting ..................2-40 Satellite P20-25 Series Maintenance Manual 2-iii...
  • Page 37 Figure 2-11 Optical drive troubleshooting process............2-30 Figure 2-12 Modem troubleshooting process ..............2-33 Figure 2-13 PCMCIA troubleshooting process..............2-35 Figure 2-14 IEEE 1394 troubleshooting process .............2-37 Tables Table 2-1 Battery LED ....................2-8 Table 2-2 DC-IN LED ....................2-9 2-iv Satellite P20-25 Series Maintenance Manual...
  • Page 38 8. Cleaning kit for optical drive troubleshooting 9. Multimeter 10. External monitor 11. USB compatible keyboard 12. Multimedia sound system with line-in and line-out ports 13. Headphones 14. USB test module and USB cable 15. Music CD Satellite P20-25 Series Maintenance Manual...

  • Page 39: Troubleshooting Flowchart (1/2)

    Ask the user if a password is registered and, if it is, ask him or her to enter the password. Verify with the customer that Toshiba Windows XP is installed on the hard disk. Operating systems that were not preinstalled by Toshiba can cause the computer to malfunction.
  • Page 40 R u n C M 1 6 5 .E X E a n d se le c t th e H A R D D IS K ite m . Y es Figure 2-1 Troubleshooting flowchart (1/2) Satellite P20-25 Series Maintenance Manual...
  • Page 41 After confirming which diagnostics test has detected Is an error detected by any of the an error, perform the diagnostics tests? appropriate procedure as outlined below. System is normal Figure 2-1 Troubleshooting flowchart (2/2) Satellite P20-25 Series Maintenance Manual...
  • Page 42 7. If an error is detected by the audio test, perform the Speaker Troubleshooting procedures in Section 2.11 and the Optical Drive Troubleshooting Procedures in Section 2.12. 8. If an error is detected by the modem test, perform the Modem Troubleshooting Procedures in Section 2.13. Satellite P20-25 Series Maintenance Manual...
  • Page 43 7. If an error is detected when using the Wireless LAN, perform the Wireless LAN Troubleshooting procedures in Section 2.16. 8. If an error is detected when using the Bluetooth, perform the Bluetooth Troubleshooting procedures in Section 2.17. Satellite P20-25 Series Maintenance Manual...

  • Page 44: Figure 2-2 Power Supply Troubleshooting Process

    Y es com puter on? (P rocedure 4) P erform internal connection A re the internal power check connections secure? (P rocedure 5) R eplace system board E N D Figure 2-2 Power Supply Troubleshooting Process Satellite P20-25 Series Maintenance Manual...

  • Page 45: Table 2-1 Battery Led

    The system is (LED on for 1 second protected and cannot be re-powered on every 2 seconds) without the AC power connected. Amber color off Battery not in low or critical low state; It’s in discharging state Satellite P20-25 Series Maintenance Manual...

  • Page 46: Table 2-2 Dc-In Led

    A faulty adaptor may not supply power or may not charge the battery. Perform Check 1. Check 1 Connect a new AC adaptor. If the problem is not resolved, go to Check 2. Check 2 Insert a new battery. If the problem is still not resolved, go to Procedure 3. Satellite P20-25 Series Maintenance Manual...

  • Page 47: Procedure 3 Power Supply Connection Check

    • If the battery LED does not light, go to Check 6. Check 6 Make sure the battery pack is installed in the computer correctly. If the battery is properly installed and the battery LED still does not light, go to Procedure 4. 2-10 Satellite P20-25 Series Maintenance Manual...

  • Page 48: Procedure 5 Replacement Check

    Make sure that the battery cable is firmly connected to the system board. If it is connected firmly, go to Check 3. Check 3 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4. Satellite P20-25 Series Maintenance Manual 2-11...

  • Page 49: Figure 2-3 Display Troubleshooting Process

    ( P r o c e d u r e 3 ) R e p la c e s y s te m b o a r d E N D Figure 2-3 Display troubleshooting process 2-12 Satellite P20-25 Series Maintenance Manual...

  • Page 50: Procedure 1 External Display Check

    Refer to Chapter 3, Tests and Diagnostics for details. If an error is detected, go to Procedure 3. If an error is not detected, the display is functioning properly. Satellite P20-25 Series Maintenance Manual 2-13...
  • Page 51 Check 5. Check 5 Replace the CPU with another of the same specifications. If the problem still exists, perform Check 6. Check 6 The system board may be damaged. Replace it with a new one. 2-14 Satellite P20-25 Series Maintenance Manual...

  • Page 52: Figure 2-4 Fdd Troubleshooting Process

    ( P r o c e d u r e 3 ) R e p la c e s y s te m b o a r d E N D Figure 2-4 FDD troubleshooting process Satellite P20-25 Series Maintenance Manual 2-15...

  • Page 53: Procedure 3 Connector Check And Replacement Check

    Chapter 4. If the FDD is still not functioning properly, perform Check 3. Check 3 Replace the system board with a new one following the steps in Chapter 4. 2-16 Satellite P20-25 Series Maintenance Manual...

  • Page 54: Figure 2-5 Keyboard Troubleshooting Process

    ( P r o c e d u r e 3 ) R e p la c e s y s te m b o a r d E N D Figure 2-5 Keyboard troubleshooting process Satellite P20-25 Series Maintenance Manual 2-17...

  • Page 55: Procedure 1 External Keyboard Check

    The keyboard may be damaged. Replace it with a new one following the instructions in Chapter 4. If the problem still exists, perform Check 3. Check 3 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4. 2-18 Satellite P20-25 Series Maintenance Manual...

  • Page 56: Figure 2-6 External Usb Device Troubleshooting Process

    R e p la c e s y s te m b o a r d ( P r o c e d u r e 2 ) E N D Figure 2-6 External USB device troubleshooting process Satellite P20-25 Series Maintenance Manual 2-19...

  • Page 57: Procedure 1 External Device And Connection Check

    Go to Procedure 2. Procedure 2 Replace system board If the error persists, the system board may be damaged. Replace it with a new one following the instructions in Chapter 4. 2-20 Satellite P20-25 Series Maintenance Manual...

  • Page 58: Figure 2-7 Tv-Out Troubleshooting Process

    T V fu n c tio n in g o k ? s e t Y e s R e p la c e s y s te m b o a r d E N D Figure 2-7 TV-out troubleshooting process Satellite P20-25 Series Maintenance Manual 2-21...
  • Page 59 Try connecting a different television to the computer. If the replacement television works, the original set may be damaged. If the replacement set does not work the system board may be damaged. Replace it with a new one following the instructions in Chapter 4. 2-22 Satellite P20-25 Series Maintenance Manual...

  • Page 60: Figure 2-8 Printer Port Troubleshooting Process

    Perform print port loopback check (Procedure 2) Print port is not Was a print port faulty continue problem detected? troubleshooting refer to Figure 2.1 Replace system board (Procedure 3) Figure 2-8 Printer port troubleshooting process Satellite P20-25 Series Maintenance Manual 2-23...
  • Page 61 If the replacement printer does not work either, or the original printer functions normally on a different computer, go to Procedure 3. Procedure 3 Replace system board The system board may be damaged. Replace it with a new one following the instructions in Chapter 4. 2-24 Satellite P20-25 Series Maintenance Manual...

  • Page 62: Figure 2-9 Touchpad Troubleshooting Process

    2.10 Touch Pad Troubleshooting 2 Troubleshooting Procedures 2.10 TouchPad Troubleshooting START TouchPad connection check (Procedure 1) TouchPad replacement check (Procedure 2) Replace system board Figure 2-9 TouchPad troubleshooting process Satellite P20-25 Series Maintenance Manual 2-25...
  • Page 63 The TouchPad unit or FPC may be defective or damaged. Replace each with a new one following the steps in Chapter 4. If the FDD is still not functioning properly, replace the system board with a new one following the steps in Chapter 4. 2-26 Satellite P20-25 Series Maintenance Manual...

  • Page 64: Figure 2-10 Speaker Troubleshooting Process

    - see Figure 2-1 Perform earphone test (Procedure 2) Do earphones function correctly? Perform connection check (Procedure 3) Perform replacement check (Procedure 4) Replace system board Figure 2-10 Speaker troubleshooting process Satellite P20-25 Series Maintenance Manual 2-27...

  • Page 65: Procedure 3 Connection Check

    If the stereo speakers don't sound properly, the stereo speakers may be defective or damaged. Replace them with new ones. If the stereo speakers still do not work properly, try replacing in turn the audio board and system board. 2-28 Satellite P20-25 Series Maintenance Manual...

  • Page 66: Figure 2-11 Optical Drive Troubleshooting Process

    Audio CD functions ok? cleaning check (Procedure 2) Perform software check (Procedure 3) Perform diagnostic test (Procedure 4) Perform connection and replacement check (Procedure 5) Replace system board Figure 2-11 Optical drive troubleshooting process Satellite P20-25 Series Maintenance Manual 2-29...

  • Page 67: Procedure 4 Diagnostic Test

    The audio test program stored in the Diagnostics Disk will test the drive’s ability to play an audio CD. See Chapter 3 for details. If any errors occur while executing the diagnostic program, go to Procedure 5. 2-30 Satellite P20-25 Series Maintenance Manual...

  • Page 68: Procedure 5 Connection Check And Replacement Check

    Chapter 4, Replacement Procedures. If the drive is still not functioning properly, perform Check 3. Check 3 The system board may be damaged. Replace it with new one following the instructions in Chapter 4, Replacement Procedures. Satellite P20-25 Series Maintenance Manual 2-31...

  • Page 69: Figure 2-12 Modem Troubleshooting Process

    (Procedure 1) Check / replace Computer unable to telephone line and detect telephone signal? connections Perform connection check (Procedure 2) Perform replacement check (Procedure 3) Replace system board Figure 2-12 Modem troubleshooting process 2-32 Satellite P20-25 Series Maintenance Manual...

  • Page 70: Procedure 1 Telephone Line Connection Check

    The modem card or RJ-11 jack may be faulty. Try replacing them. If the problem persists, the system board may be defective or damaged. Replace the System Board with a new one following the steps in Chapter 4, Replacement Procedures. Satellite P20-25 Series Maintenance Manual 2-33...

  • Page 71: Figure 2-13 Pcmcia Troubleshooting Process

    2.14 PCMCIA Troubleshooting START Perform SYCARD test (Procedure 1) Do errors occur during PCMCIA unit is SYCARD test? not faulty. Perform PCMCIA socket replacement check (Procedure 2) Replace system board Figure 2-13 PCMCIA troubleshooting process 2-34 Satellite P20-25 Series Maintenance Manual...
  • Page 72 Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and replace the socket. If the problem persists, the system board may be defective or damaged. Replace the system board with a new one following the steps in Chapter 4. Satellite P20-25 Series Maintenance Manual 2-35...

  • Page 73: Figure 2-14 Ieee 1394 Troubleshooting Process

    IEEE 1394 port and transmission are not Was an IEEE 1394 problem detected? faulty. Continue troubleshooting - refer to Figure 2.1 Perform connection and replacement check (Procedure 3) Replace system board Figure 2-14 IEEE 1394 troubleshooting process 2-36 Satellite P20-25 Series Maintenance Manual...
  • Page 74 The transmission cable may be damaged. Replace with a good cable. If the malfunction persists, go to Check 4 Check 4 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4. Satellite P20-25 Series Maintenance Manual 2-37...

  • Page 75: Wireless Lan Troubleshooting

    Continue Was a wireless LAN problem delected? troubleshooting - refer to Figure 2.1 Perform connector and replacement check (Procedure 2) Replace wireless LAN antenna/unit Replace system board Figure 2-15 Wireless LAN troubleshooting process 2-38 Satellite P20-25 Series Maintenance Manual...

  • Page 76: Procedure 1 Diagnostic Test

    The wireless LAN unit may be damaged. Replace it with a new one following the instructions in Chapter 4. If the problem still exists, perform Check 4. Check 4 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4. Satellite P20-25 Series Maintenance Manual 2-39...

  • Page 77: Bluetooth Troubleshooting

    (Procedure 1) Bluetooth is not faulty. Was a Bluetooth problem Continue troubleshooting-refer detected? to Figure 2.1 Perform connector and replacement check (Procedure 2) Replace Bluetooth module Replace system board Figure 2-16 Bluetooth troubleshooting process 2-40 Satellite P20-25 Series Maintenance Manual...
  • Page 78 The Bluetooth module may be damaged. Replace it with a new one following the instructions in Chapter 4. If the problem still exists, perform Check 4. Check 4 The system board may be damaged. Replace it with a new one following the instructions in Chapter 4. Satellite P20-25 Series Maintenance Manual 2-41...
  • Page 79 2 Troubleshooting Procedures 2.17 Bluetooth Troubleshooting 2-42 Satellite P20-25 Series Maintenance Manual...
  • Page 80 Chapter 3 Tests and Diagnostics...
  • Page 81 3. Tests and Diagnostics 3-ii Satellite P20-25 Series Maintenance Manual...
  • Page 82 Mouse (Pad) Test ..................... 3-18 3.14 LCD Pixels Mode Test..................... 3-20 3.15 Lid Switch Test ......................3-21 3.16 HDD R/W Test......................3-22 3.17 LAN Test........................3-24 3.18 RTC Test ........................3-26 3.19 CD Control Button Test ................... 3-27 Satellite P20-25 Series Maintenance Manual 3-iii...
  • Page 83 3. Tests and Diagnostics 3-iv Satellite P20-25 Series Maintenance Manual...

  • Page 84: The Diagnostic Test

    A formatted working diskette for the floppy disk drive test (Floppy Disk Drive Test) A data CD disc (CD-ROM Test) A LAN loopback connector (LAN Test) IEEE1394 Link Cable The following sections explain how to execute the Test & Diagnostic Program and detail the tests within the program. Satellite P20-25 Series Maintenance Manual...

  • Page 85: Executing The Diagnostic Test

    3.2 Executing the Diagnostic Test Executing the Diagnostic Test Toshiba MS-DOS is required to run the DIAGNOSTICS PROGRAM. To start the DIAGNOSTIC PROGRAM, follow these steps: 1. Insert the diagnostics diskette #1 in the floppy disk drive and turn on the computer.
  • Page 86 3.2 Executing the Diagnostic Test 3. Tests and Diagnostics The below display will show up at the beginning of T&D program. If the test result passes, the following display will show up: Satellite P20-25 Series Maintenance Manual...
  • Page 87 Then press any key for next actions – the below display presented if copying test log file onto diskette is necessary. This action will be executed when “Y” key pressed. It will skip this process if “N” key pressed. Satellite P20-25 Series Maintenance Manual...
  • Page 88 And then it will check if it’s necessary to leave this program. Program will quit when “Y” key pressed and it will go back main menu for next test if “N” key pressed. NOTE: Press Pause to pause a test and Enter to resume. Satellite P20-25 Series Maintenance Manual...

  • Page 89: Config Check Test

    NOTE: To execute this test, you must input unit Part Number as “Uppercase Character”. Then it will show its configuration is correct (in green color) or failed (in color). The screen should display as below, indicating whether the test is passed or failed after comparison. Satellite P20-25 Series Maintenance Manual...

  • Page 90: Dmi Check Test

    SKU data. NOTE: To execute this test, you must input unit Part Number as “Uppercase Character”. The screen should display as below, indicating whether the test is passed or failed after comparison. Satellite P20-25 Series Maintenance Manual...

  • Page 91: Pio Loopback Test

    - including Pattern test, Data Pin test, Control register test & Control pin/ Status pin test. NOTE: Remember to connect a PIO loopback connector to the computer's printer port before test begins. The screen should display as below, indicating whether the test is passed or failed when finished. Satellite P20-25 Series Maintenance Manual...

  • Page 92: Ieee 1394 Test

    3. Make sure the machines are firmly connected by the IEEE 1394 transmission line 4. Execute 1394M.bat on the computer 5. Select the IEEE 1394 transmission test for the test device 6. Start data transmission and complete check Satellite P20-25 Series Maintenance Manual...

  • Page 93: Speaker Audio Test

    OK within 3 times “Beep” sound generated. NOTE: Remember to tune up the volume as “Maximum” before this test starts. The screen should display as below, indicating whether the test is passed or failed after the question. 3-10 Satellite P20-25 Series Maintenance Manual...

  • Page 94: Fan On/Off Test

    The computer will stop the fan working after any key pressed. Listen to check if the fan is “OFF” – it means no rotating sound. The screen should display as below, indicating whether the test is passed or failed after the question. Satellite P20-25 Series Maintenance Manual 3-11...

  • Page 95: Main Battery Charge Test

    Remain charge capacity (0 ~ 100%) Charge function (PASS/FAIL) - “Battery Is Full” showed when “remain charge capacity” is 100% The screen should display as below, indicating whether the test is passed or failed when finished. 3-12 Satellite P20-25 Series Maintenance Manual...

  • Page 96: Fdd Test

    NOTE: The write-protected device of this formatted diskette should be “Disable”. The subtests run automatically. NOTE: Press “Esc” key can skip the current subtest. The screen should display as below, indicating whether the subtests pass or fail when finished. Satellite P20-25 Series Maintenance Manual 3-13...

  • Page 97: Cd-Rom Test

    Each item can be chosen by manual. When each test item finished, the CD-ROM tray will open. Check whether the tray can open automatically. NOTE: Press “Esc” key can skip the current subtest. The screen should display as below, indicating whether the subtests pass or fail when finished. 3-14 Satellite P20-25 Series Maintenance Manual...

  • Page 98: Keyboard Test

    NOTE: The “Fn” key cannot be tested in the keyboard test. To determine whether the “Fn” key is working correctly, press “Fn+F6 ” or “Fn+F7 ” keys to check if LCD display brightness change gradually. Satellite P20-25 Series Maintenance Manual 3-15...
  • Page 99 3. Tests and Diagnostics 3.12 Keyboard Test 3-16 Satellite P20-25 Series Maintenance Manual...
  • Page 100 Pressing a key also reveals that key’s scan codes in the upper right hand corner of the screen. When the key is depressed, its make code is displayed. When the key is released, the break code is shown. Satellite P20-25 Series Maintenance Manual 3-17...

  • Page 101: Mouse (Pad) Test

    After checking T/Pad buttons and cursor’s function, use “Tab” key or use T/Pad cursor to click the “OK” column will end this test. It will indicate whether the subtests pass or fail after three questions. 3-18 Satellite P20-25 Series Maintenance Manual...
  • Page 102 3. Tests and Diagnostics NOTE: The above figure has three compartments although the Touch Pad installed may only have two buttons. In this case, the central compartment in the figure does not correspond to any button. Satellite P20-25 Series Maintenance Manual 3-19...

  • Page 103: Lcd Pixels Mode Test

    - including 320*200 (4/16/256 colors), 640*200 (2/16 colors), 640*350 (2/16 colors), 640*480 (2/16/256 colors), 800*600 (256 colors) and 1024*768 (256 colors). The screen should display as below, indicating whether the test is passed or failed after the question. 3-20 Satellite P20-25 Series Maintenance Manual...

  • Page 104: Lid Switch Test

    Follow below steps to run this test: 1. Close the LCD cover. 2. Heard 3 “Beep” sound happened during LCD closed. 3. Open the LCD. Then it will indicate whether the test is passed or failed. Satellite P20-25 Series Maintenance Manual 3-21...

  • Page 105: Hdd R/W Test

    3.16 HDD R/W Test The HDD R/W test allows the user to test aurally HDD read/write function. For data security concern, it is necessary to input password - “TOSHIBA” before HDD write test starts. The HDD test includes three subtests of the: 1.
  • Page 106 NOTE: Press “Ctrl + Break” keys can terminate the current subtest. The screen should display as previous picture, indicating whether the subtest is passed or failed when finished. NOTE: The AC adaptor should be connected to successfully run this test. Satellite P20-25 Series Maintenance Manual 3-23...

  • Page 107: Lan Test

    The LAN test includes two subtests of the: 1. Speed100 - in cluding Ethernet_802.2, Ethernet_II, Ethernet_SNAP and Ethernet_802.3. All test items are in LSB mode. 2. Speed10 including Ethernet_802.2 in LSB mode. The subtests run automatically. 3-24 Satellite P20-25 Series Maintenance Manual...
  • Page 108 3.17 LAN Test 3. Tests and Diagnostics The screen should display as below, indicating whether the subtests pass or fail when finished. Satellite P20-25 Series Maintenance Manual 3-25...

  • Page 109: Rtc Test

    Checks the computer’s RTC (Real Time Clock) and calendar functions by comparing the DOS and CMOS values. The test runs automatically. The screen should display as below, indicating whether the test is passed or failed when finished. 3-26 Satellite P20-25 Series Maintenance Manual...

  • Page 110: Cd Control Button Test

    Press each of the buttons on the front panel in turn. A yellow bar will appear on the relevant section of the figure if the button passes the test. Press Esc to quit the test. Satellite P20-25 Series Maintenance Manual 3-27...
  • Page 111 3. Tests and Diagnostics 3.18 RTC Test 3-28 Satellite P20-25 Series Maintenance Manual...
  • Page 112 Chapter 4 Replacement Procedures...
  • Page 113 4 Replacement Procedures 4-ii Satellite P20-25 Series Maintenance Manual...
  • Page 114 Direct play LED board..................... 4-66 4.24 Audio Board......................4-68 4.25 Speakers ........................4-70 4.26 Fan Set ........................4-73 4.27 Display Mask ......................4-76 4.28 FL Inverter Board ....................4-78 4.29 LCD Module ......................4-80 Satellite P20-25 Series Maintenance Manual 4-iii...
  • Page 115 4 Replacement Procedures 4-iv Satellite P20-25 Series Maintenance Manual...

  • Page 116: General

    Refer to the example on the following page. Battery pack Main Module Keyboard Wireless Expansion Modem / Top Cover Memory Card Bluetooth Unit Module Display Unit Assembly Display Mask System Board Inverter Board Fan Set Module Satellite P20-25 Series Maintenance Manual...
  • Page 117 Battery pack Main Module Keyboard Wireless Expansion Modem / Top Cover Memory Card Bluetooth Unit Module Display Unit Assembly Display Mask System Board Inverter Board Fan Set Module Satellite P20-25 Series Maintenance Manual...
  • Page 118 DANGER: Always use the lithium ion battery pack or backup 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 119 9. The computer contains many sharp edges and corners, so be careful not to injure yourself. 10. After you have replaced an FRU, make sure the computer is functioning properly by performing the appropriate test on the FRU you have fixed or replaced. Satellite P20-25 Series Maintenance Manual...
  • Page 120 FRU. After installing an FRU in the computer, confirm that the FRU and the computer are functioning properly. Satellite P20-25 Series Maintenance Manual...
  • Page 121 Tweezers, to lift out screws that you cannot grasp with your fingers. ESD mats for the floor and the table you are working on. ESD wrist strap or heel grounder. Anti-static carpeting or flooring. Air-ionizers in highly static sensitive areas. Satellite P20-25 Series Maintenance Manual...

  • Page 122: Battery

    Fig 4-1: Removing the battery pack NOTE: For environmental reasons, do not throw away a spent battery pack. Please return spent battery packs to Toshiba. Satellite P20-25 Series Maintenance Manual...
  • Page 123 WARNING: The battery is a lithium ion battery and can explode if not properly replaced, used, handled or disposed of. Use only batteries recommended by Toshiba as replacements. 1. Slide the battery pack into the 2 module bay.

  • Page 124: Pc Card

    To remove a PC Card, follow the steps below. 1. Push the eject button for the card you want to release. The button will pop out when you release it. Fig 4-2: Pressing the eject button Satellite P20-25 Series Maintenance Manual...
  • Page 125 2. Push the eject button once more to pop the PC Card out slightly. 3. Grasp the PC Card and remove it. Fig 4-3: Removing the PC Card 4. Push the eject button back into place, if necessary. 4-10 Satellite P20-25 Series Maintenance Manual...
  • Page 126 To install the PC Card, follow the steps below and refer to the figures in the preceding section. 1. Make sure the two eject buttons do not stick out. 2. Insert the PC Card and press gently to ensure a firm connection. Satellite P20-25 Series Maintenance Manual 4-11...

  • Page 127: Removable Modules

    2 module bay, refer to Section 4.2, Battery. Disassembly and assembly procedures for the optical drive, TV tuner, removable HDD and FDD are given in later sections. 4-12 Satellite P20-25 Series Maintenance Manual...
  • Page 128 Turn the computer upside down. Unlock the main module bay lock. Slide the main module bay latch to release it then pull the main module out from the bay. Fig 4-4: Removing the main module Satellite P20-25 Series Maintenance Manual 4-13...
  • Page 129 1. Slide the device into the main module bay. The main module bay latch will click automatically and secure the device in position. 2. Engage the main module bay latch lock. 4-14 Satellite P20-25 Series Maintenance Manual...

  • Page 130: Optical Drive

    Lift off the back bracket plate. 2. Remove four silver M2×4 screws (two from each side of the drive) securing the main bracket. Lift off the main bracket. Fig 4-5: Removing the bracket screws Satellite P20-25 Series Maintenance Manual 4-15...
  • Page 131 4 Replacement Procedures 4.5 Optical Drive 3. Pull the optical drive board from the rear of the drive. 4-16 Satellite P20-25 Series Maintenance Manual...
  • Page 132 2. Place the drive in the main bracket and secure with four silver M2×4 screws (two from each side of the drive). 3. Position the back bracket plate and secure with three black M2×8 screws and one silver M2×4 screw. Satellite P20-25 Series Maintenance Manual 4-17...

  • Page 133: Tv Tuner

    1. Remove seven M2×8 screws securing the TV tuner case. 2. Lift the lid off the TV tuner case and lift out the TV tuner board (if appropriate, detach the TV tuner transfer assembly FPC). Fig 4-6: Removing the TV tuner case screws 4-18 Satellite P20-25 Series Maintenance Manual...
  • Page 134 1. Position the TV tuner board in the TV tuner case and, if appropriate, attach the TV tuner transfer assembly FPC. 2. Secure the lid of the TV tuner case with seven M2×8 screws. Satellite P20-25 Series Maintenance Manual 4-19...

  • Page 135: Removable Hdd

    1. Release the lid latch of the removable HDD container and open the HDD container lid. 2. Ease the HDD out of the container. Fig 4-7: Opening the removable HDD container 4-20 Satellite P20-25 Series Maintenance Manual...
  • Page 136 Hold it by the sides. 3. Remove the four M3×3 screws that secure the HDD case to the HDD. 4. Lift off the HDD case. Fig 4-8: Removing the HDD case screws Satellite P20-25 Series Maintenance Manual 4-21...
  • Page 137 4 Replacement Procedures 4.7 Removable HDD 5. Grasp the HDD and peel off the aluminum HDD shielding. 6. Gently pull the HDD connector off the HDD. 4-22 Satellite P20-25 Series Maintenance Manual...
  • Page 138 3. Seat the HDD in the HDD case and secure with four M3×3 screws. 4. Slide the HDD into the HDD container. 5. Close the HDD container lid and lock it with the latch. Satellite P20-25 Series Maintenance Manual 4-23...

  • Page 139: Removable Fdd

    1. Remove two M2.5×4 screws from each side of the drive and three M2.5×4 screws securing the rear panel. 2. Lift off the FDD bracket. Fig 4-9: Removing the FDD bracket screws 3. Release the FDD FPC and remove. 4-24 Satellite P20-25 Series Maintenance Manual...
  • Page 140 To reassemble a FDD, follow the steps below and refer to the figure in the preceding section. 1. Attach the FDD FPC. 2. Place the FDD in the FDD bracket and secure with two M2.5×4 screws on each side of the drive and three M2.5x4 screws on the rear panel. Satellite P20-25 Series Maintenance Manual 4-25...

  • Page 141: Wireless Lan Unit

    To remove the wireless LAN unit, first remove the battery pack then follow the steps below. 1. Turn the computer upside down and loosen two embedded screws securing the wireless LAN compartment cover. 2. Lift off the wireless LAN compartment cover. Fig 4-10: Removing the wireless LAN compartment cover 4-26 Satellite P20-25 Series Maintenance Manual...
  • Page 142 5. Grasp the wireless LAN unit and pull it out. Fig 4-11: Removing the wireless LAN unit CAUTION: Do not touch the connectors on the wireless LAN unit or on the computer. Debris on the connectors may cause malfunction. Satellite P20-25 Series Maintenance Manual 4-27...
  • Page 143 6. Seat the wireless LAN compartment cover and secure it with the two embedded screws. 4-28 Satellite P20-25 Series Maintenance Manual...

  • Page 144: Expansion Memory

    To remove the expansion memory, first remove the battery pack, then follow the steps below. 1. Turn the computer upside down. 2. Remove two embedded screws securing the expansion memory cover. 3. Lift off the expansion memory cover. Fig 4-12: Removing the expansion memory cover Satellite P20-25 Series Maintenance Manual 4-29...
  • Page 145 5. Grasp the expansion memory and pull it out. Fig 4-13: Removing the expansion memory CAUTION: Do not touch the connectors on the expansion memory or on the computer. Debris on the connectors may cause memory access problems. 4-30 Satellite P20-25 Series Maintenance Manual...
  • Page 146 5. Gently, push the expansion memory down until latches on either side engage the expansion memory to hold it in place. 6. Seat the expansion memory cover in place and secure it with two embedded screws. Satellite P20-25 Series Maintenance Manual 4-31...

  • Page 147: Modem / Bluetooth Unit

    1. Turn the computer upside down. 2. Remove two embedded screws securing the modem / Bluetooth unit cover. 3. Lift off the modem / Bluetooth unit cover. Fig 4-14: Removing the modem / Bluetooth unit cover 4-32 Satellite P20-25 Series Maintenance Manual...
  • Page 148 5. Carefully lift the unit off its connector. 6. If a modem is being removed, disconnect its power cable from the system board. If a Bluetooth unit is being removed, disconnect its FPC cable from the system board. Satellite P20-25 Series Maintenance Manual 4-33...
  • Page 149 If a Bluetooth unit is being fitted, connect the FPC cable. 5. Fit the modem / Bluetooth unit onto its connector and secure with two M2.5×3 screws. 6. Replace the modem / Bluetooth unit cover and secure with two embedded screws. 4-34 Satellite P20-25 Series Maintenance Manual...

  • Page 150: Cpu

    To remove the CPU, first remove the battery pack, then follow the steps below. 1. Turn the computer upside down and remove five embedded security screws securing the CPU compartment cover. Remove the CPU compartment cover. Fig 4-16: Removing the CPU compartment cover Satellite P20-25 Series Maintenance Manual 4-35...
  • Page 151 Fig 4-17: Removing the heat sink CAUTION: If you remove the heat sink, you should use the CPU grease tool to remove the grease on the CPU and heat sink. Reapply fresh grease before replacing the heat sink. 4-36 Satellite P20-25 Series Maintenance Manual...
  • Page 152 4. Turn the cam on the CPU socket with a flat-blade screwdriver so that the notch on the cam is aligned with the open side of the CPU socket to unlock the CPU. Fig 4-18: Removing the CPU 5. Gently lift out the CPU. Satellite P20-25 Series Maintenance Manual 4-37...
  • Page 153 4. Seat the heat sink over the CPU and secure with four screws in the order indicated on the heat sink (1,2,3,4). 5. Secure the CPU compartment cover with the five embedded security screws. 4-38 Satellite P20-25 Series Maintenance Manual...

  • Page 154: Hdd

    4.13 HDD 4 Replacement Procedures 4.13 HDD CAUTION: When handling the HDD, do not press the top surface as shown by the arrow. Hold it by the sides. Satellite P20-25 Series Maintenance Manual 4-39...
  • Page 155 2. Remove two M2.5×4 black screws securing the HDD and lift out the HDD unit. Fig 4-19: Removing the HDD unit cover screws NOTE: It is not necessary to remove the HDD case unless you are going to replace the HDD. 4-40 Satellite P20-25 Series Maintenance Manual...
  • Page 156 4. Lift off the HDD case. 5. Grasp the HDD at the side and peel off the aluminum HDD shielding. 6. Gently pull the HDD connector off the HDD. Fig 4-21: Removing the aluminum HDD shielding and connector Satellite P20-25 Series Maintenance Manual 4-41...
  • Page 157 . 3. Seat the HDD in the HDD case and secure with four M3×3 screws. 4. Seat the HDD unit in the HDD slot and secure it with two M2.5×4 black screws. 4-42 Satellite P20-25 Series Maintenance Manual...

  • Page 158: Keyboard

    1. Open the display panel. 2. Insert a thin tool into each of the narrow holes in the strip cover and lever the strip cover up to release its latches. Fig 4-22: Removing the strip cover Satellite P20-25 Series Maintenance Manual 4-43...
  • Page 159 4 Replacement Procedures 4.14 Keyboard 3. Remove two M2.5×3 silver screws securing the keyboard. 4. Lift the keyboard out and place over the display hinges, revealing the keyboard cable. 5. Disconnect the keyboard cable and remove the keyboard. Fig 4-23: Removing keyboard cable and keyboard 4-44 Satellite P20 Series Maintenance Manual...
  • Page 160 1. Connect the keyboard cable to the system board. 2. Set the keyboard in place and secure it with two M2.5×3 silver screws. 3. Seat the strip cover and press down to ensure the strip cover latches engage, locking it in place. Satellite P20-25 Series Maintenance Manual 4-45...

  • Page 161: Top Cover

    2. Remove seven M2.5×6 screws from the keyboard tray securing the top cover. 3. Detach the following three cables: • LED / power button board FPC • Function key board FPC • TouchPad FPC Fig 4-24: Removing the top cover screws and cables Satellite P20-25 Series Maintenance Manual 4-45...
  • Page 162 • Five M2.5×6 black screws • Six M2.5×14 black screws Fig 4-25: Removing the screws from the computer underside 5. Turn the computer upright, open the display cover and lift off the top cover. 4-46 Satellite P20-25 Series Maintenance Manual...
  • Page 163 2. Secure the top cover with seven M2.5×6 screws. 3. Turn the computer upside down and secure the following sixteen screws: • Three M2.5×3 silver screws • Two M2.5×4 black screws • Five M2.5×6 black screws • Six M2.5×14 black screws Satellite P20-25 Series Maintenance Manual 4-47...

  • Page 164: Function Key Board

    1. Remove the keyboard, HDD, main module and top cover. 2. Place the top cover face down. 3. Remove two M2.5×3 silver screws securing the function key board. Remove function key board. Fig 4-26: Removing the function key board 4-48 Satellite P20-25 Series Maintenance Manual...
  • Page 165 To install the Function Key Board, follow the steps below and refer to the figure in the preceding section. 1. Feed the function key board FPC through the top cover. 2. Position the function key board and secure with two M2.5×3 silver screws. Satellite P20-25 Series Maintenance Manual 4-49...

  • Page 166: Led / Power Button Board

    1. Remove the keyboard, HDD, main module and top cover. 2. Place the top cover face down. 3. Remove four M2.5×3 silver screws securing the LED / power button board. Remove LED / power button board. Fig 4-27: Removing the LED/power button board 4-50 Satellite P20-25 Series Maintenance Manual...
  • Page 167 To install the LED / Power Button Board, follow the steps below and refer to the figure in the preceding section. 1. Feed the LED / power button board FPC through the top cover. 2. Position the LED / power button board and secure with four M2.5×3 silver screws. Satellite P20-25 Series Maintenance Manual 4-51...

  • Page 168: Touchpad

    5. Lift out the TouchPad cover followed by the TouchPad. 6. If you need to replace the TouchPad button board, remove two M2.5×3 silver screws securing it, then lift it out. Fig 4-28: Removing the TouchPad button board 4-52 Satellite P20-25 Series Maintenance Manual...
  • Page 169 Secure the TouchPad Button Board with two M2.5×3 silver screws. 2. Position the TouchPad cover and secure with five M2.5×3 silver screws. 3. Connect the TouchPad board FPC cable to both the TouchPad button board and the TouchPad. Satellite P20-25 Series Maintenance Manual 4-53...

  • Page 170: Display Assembly

    Fig 4-29: Removing the wireless LAN compartment cover 3. Detach the two ends of the wireless LAN antenna. 4. Remove the keyboard, HDD, main module and top cover. 5. Feed the wireless LAN antenna through the system board. 4-54 Satellite P20-25 Series Maintenance Manual...
  • Page 171 7. Remove one m2.5×12 screw securing the left end of the hinge cover and one m2.5×3 silver screw securing the right end. 8. Lift off the hinge cover. Fig 4-31: Removing the hinge cover Satellite P20-25 Series Maintenance Manual 4-55...
  • Page 172 9. Remove two M2.5×6 screws from the hinges and release the display cable. 10. Pull on the attached handle to detach the display cable from the system board. 11. Lift the display assembly off the computer chassis. 4-56 Satellite P20-25 Series Maintenance Manual...
  • Page 173 7. Secure the hinge cover with one M2×4 screw at the rear of the each hinge. 8. Secure the display assembly with two M2.5×6 screws on the I/O cover. Satellite P20-25 Series Maintenance Manual 4-57...

  • Page 174: System Board

    4 Replacement Procedures 4.20 System Board 4.20 System Board Removing the System Board To remove the system board, first remove the battery pack, then follow the steps below. 1. Turn the computer upside down and remove five embedded security screws securing the CPU compartment cover.
  • Page 175 4.20 System Board 4 Replacement Procedures 3. Remove the keyboard, HDD, main module, CPU, modem or Bluetooth unit, expansion memory cards, wireless LAN cards, PC card(s), top cover and display assembly. 4. Remove nine M2.5×4 screws securing the low I/O cover (five from the top, two from the rear, and two from the base).
  • Page 176 4 Replacement Procedures 4.20 System Board 7. Remove the three M2.5×6 screws securing the system board to the computer chassis. 8. Detach the following five cables from the system board: • Right-side speaker cable • Direct play LED FPC cable •...
  • Page 177 4.20 System Board 4 Replacement Procedures Installing the System Board To install the system board, follow the steps below and refer to the figures in the preceding section. 1. Seat the system board and secure with three M2.5×6 screws. 2. Secure the following five cables to the system board: •...

  • Page 178: Direct Play Button Board

    4 Replacement Procedures 4.21 Direct Play Button Board 4.21 Direct Play Button Board Removing the Direct Play Button Board To remove the direct play button board, first remove the battery pack, then follow the steps below. Remove the keyboard, HDD, main module and top cover. Release the direct play button FFC from the system board.
  • Page 179 4.21 Direct Play Button Board 4 Replacement Procedures Installing the Direct Play Button Board To install the direct play button board, follow the steps below and refer to the figure in the preceding section. Secure the direct play button board to the bracket with two M2×3 screws. Secure the combined unit to the direct play cover assembly with one M2×3 screw.

  • Page 180: Cir Board

    4 Replacement Procedures 4.22 CIR Board 4.22 CIR Board Removing the CIR Board To remove the CIR board, first remove the battery pack, then follow the steps below. Remove the keyboard, HDD, main module and top cover. Release the CIR FFC and direct play button FFC from the system board. Remove two M2.5×6 screws securing the direct play cover assembly.
  • Page 181 4.22 CIR Board 4 Replacement Procedures Installing the CIR Board To install the CIR board, follow the steps below and refer to the figure in the preceding section. Seat the CIR board and secure with one M2.5×6 screw. Seat the direct play cover assembly and secure with two M2.5×6 screws. Attach the CIR FFC and direct play button FFC to the system board.

  • Page 182: Direct Play Led Board

    4 Replacement Procedures Direct play LED board 4.23 Direct play LED board Removing the Direct Play LED Board To remove the direct play LED board, first remove the battery pack, then follow the steps below. 1. Remove the keyboard, HDD, main module and top cover. 2.
  • Page 183 4.23 Direct play LED board 4 Replacement Procedures Installing the Direct Play LED Board To install the direct play LED board, follow the steps below and refer to the figure in the preceding section. 1. Stick the direct play LED board to the tape on the chassis. 2.

  • Page 184: Audio Board

    4 Replacement Procedures 4.24 Audio Board 4.24 Audio Board Removing the Audio Board To remove the audio board, first remove the battery pack, then follow the steps below. 1. Remove the keyboard, HDD, main module and top cover. 2. Detach the left-side speaker cable and audio board FFC cable from the audio board.
  • Page 185 4.24 Audio Board 4 Replacement Procedures Installing the Audio Board To install the audio board, follow the steps below and refer to the figure in the preceding section. 1. Seat the audio board and secure with two M2.5×6 screws. 2. Attach the left-side speaker cable and audio board FFC cable. Satellite P20 Series Maintenance Manual 4-69...

  • Page 186: Speakers

    4 Replacement Procedures 4.25 Speakers 4.25 Speakers Removing the Speakers To remove the speakers, first remove the battery pack, then follow the steps below. 1. Remove the keyboard, HDD, main module and top cover. 2. Turn the computer upside down and remove one M2.5×4 screw securing each speaker.
  • Page 187 4.25 Speakers 4 Replacement Procedures 3. Place the chassis upright. Detach the left-side speaker cable from the audio board and the right-side speaker cable from the system board. 4. Remove two M2.5×4 screws securing each speaker. 5. Lift out each speaker. Fig 4-41: Removing the speakers Satellite P20 Series Maintenance Manual 4-71...
  • Page 188 4 Replacement Procedures 4.25 Speakers Installing the Speakers To install the speakers, follow the steps below and refer to the figure in the preceding section. 1. Seat each speaker. The speaker cases are marked with L (left) and R (right). 2.

  • Page 189: Fan Set

    4.26 Fan Set 4 Replacement Procedures 4.26 Fan Set Removing the Fan Set To remove the fan set, first remove the battery pack, then follow the steps below. 1. Remove the keyboard, HDD, main module, CPU, modem or Bluetooth unit, expansion memory cards, wireless LAN cards, PC card(s), top cover and system board.
  • Page 190 4 Replacement Procedures 4.26 Fan Set 3. Turn the computer over and remove seven M2.5×4 screws securing the fan set from the base. Fig 4-43: Removing the outer chassis fan screws 4. Lift out the fan set. 4-74 Satellite P20 Series Maintenance Manual...
  • Page 191 4.26 Fan Set 4 Replacement Procedures Installing the Fan Set To install the fan set, follow the steps below and refer to the figure in the preceding section. 1. Seat the fan set and secure from inside the chassis with five M2.5×4 screws and one M2.5×3 screw.

  • Page 192: Display Mask

    2. Remove six mask seals to expose six screws securing the display mask. 3. Remove two M2×3 screws from the top of display assembly and another four M2.5×6 screws that were covered by the mask seals. Fig 4-44: Removing the display mask screws 4-76 Satellite P20-25 Series Maintenance Manual...
  • Page 193 1. Seat the display mask and secure the snaps on each side. 2. Secure the display mask with two M2×3 screws at the top of display assembly and another four M2.5×6 screws nearer the base. 3. Cover the six secured screws with mask seals. Satellite P20-25 Series Maintenance Manual 4-77...

  • Page 194: Fl Inverter Board

    3. Remove one M2x3 screw securing the FL inverter board. 4. Lift up the FL inverter board and detach the FL cable and HV cable. Remove the FL inverter board. Fig 4-45: Removing the FL inverter board 4-78 Satellite P20-25 Series Maintenance Manual...
  • Page 195 2. Seat the FL inverter board and secure it with t one M2x3 screw. 3. Secure the LCD cable with one M2x3 screw. 4. Install the display mask, display assembly, top cover, keyboard, HDD, main module and battery pack. Satellite P20-25 Series Maintenance Manual 4-79...

  • Page 196: Lcd Module

    1. Remove the main module, HDD, keyboard, top cover, display assembly, display mask and FL inverter board. 2. Remove six M2.5×6 screws securing the LCD module. 3. Lift the LCD module out of the LCD cover. Fig 4-46: Removing the LCD module 4-80 Satellite P20-25 Series Maintenance Manual...
  • Page 197 7. Pull out LCD cable from LCD connector. Fig 4-47: Removing the LCD cable NOTE: If the LCD module malfunctions, remove the LCD cable and LCD bracket. Then replace the whole LCD module unit. Satellite P20-25 Series Maintenance Manual 4-81...
  • Page 198 5. Secure the LCD module with six M2.5×6 screws. First secure the screws (one on each side) nearer the base of the module, then secure the screws nearer the top. 6. Secure LCD cable with one M2.5×4 screw. 4-82 Satellite P20-25 Series Maintenance Manual...

  • Page 199: Appendices

    Appendices...
  • Page 200 Appendices App-ii SatelliteP20-25 Series Maintenance Manual...
  • Page 201 Appendix Contents Appendix A Handling the LCD Module................. A-1 Appendix B Board Layout....................B-1 System Board (FRDSY*) Bottom View ..............B-1 System Board (FRDSY*) Top View ................B-2 Appendix C Pin Assignments ..................C-1 JP24/JP26 SODIMM I/F (144-pin)................C-1 JP1 LCD I/F (40-pin) ....................C-5 JP15 RGB I/F (15-pin)....................C-6 JP34 HDD I/F (44-pin) ....................C-7 JP28 Main Module I/F (60-pin) .................C-8...
  • Page 202 Appendices Figures Figure B.1 System Board (FRDSY*) Bottom View............B-1 Figure B.2 System Board (FRDSY*) Top View .............B-2 App-iv SatelliteP20-25 Series Maintenance Manual...
  • Page 203 Tables Table B-1 System board ICs and connectors (top and bottom) ..........B-3 Table B-2 System board ICs and connectors (top and bottom) ..........B-4 Table C-1 SODIMM I/F pin assignments (144-pin)............C-1 Table C-2 LCD I/F pin assignments (40-pin) ..............C-5 Table C-3 RGB I/F pin assignments (15-pin)..............C-6 Table C-4 HDD I/F pin assignments (44-pin) ...............C-7...
  • Page 204 Appendices App-vi SatelliteP20-25 Series Maintenance Manual...

  • Page 205: Appendix A Handling The Lcd Module

    LCD cover before securing the module with screws. Do not force the module into place, because stress can affect its performance. Note: The panel’s polarized surface is easily scarred, so handle it carefully. Satellite P20-25 Series Maintenance Manual...
  • Page 206 Do not apply cleanser directly to the panel. Cleaner 4. If water or other liquid is left on the panel’s surface for a long period, it can change the screen’s tint or stain it. Be sure to quickly wipe off any liquid. Satellite P20-25 Series Maintenance Manual...
  • Page 207 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. Be sure to wear a wrist or ankle ground when handling the module. Satellite P20-25 Series Maintenance Manual...
  • Page 208 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. 9. Do not disassemble the LCD module. Disassembly can cause malfunctions. Satellite P20-25 Series Maintenance Manual...
  • Page 209 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. Satellite P20-25 Series Maintenance Manual...
  • Page 210 Satellite P20-25 Series Maintenance Manual...

  • Page 211: Appendix B Board Layout

    Appendix B Board Layout B.1 System Board (FRDSY*) Bottom View Figure B-1 System board (FRDSY*) layout (Bottom) Satellite P20-25 Series Maintenance Manual...

  • Page 212: System Board (Frdsy*) Top View

    B.2 System Board (FRDSY*) Top View Figure B-2 System board (FRDSY*) layout (Top) Satellite P20-25 Series Maintenance Manual...
  • Page 213 U29,U32, U39, U40 4M32 VRAM AC97 Codec ALC202 SUPER I/O LPC47N227 CIR Control KBC/EC PC87591L Keyboard Connector CARDBUS & SD Controller T7L58XB-0101 Clock Generator ICS-952623CG Audio Amplifier Chip TPA6011 Lid Switch OZ-168T 1394 Fire Wire Controller TSB43AB21A Satellite P20-25 Series Maintenance Manual...
  • Page 214 POWER FPC CONNECTOR (#U) TPA FPC CONNECTOR (#V) JP10 AUDIO FPC CONNECTOR (#W) JP27 DIRECT/B FFC CONNECTOR (#X) JP13 CIR/B FFC CONNECTOR (#Y) JP12 LED FPC CONNECTOR (#Z) USER KEY FPC CONNECTOR (#AA) AUDIO CONNECTOR Satellite P20-25 Series Maintenance Manual...

  • Page 215: Appendix C Pin Assignments

    Pin No. Signal name Pin No. Signal Name VREF VREF 25VDD 2.5VDD DQS0 DQ12 2.5VDD 2.5VDD DQ13 DQS1 DQ10 DQ14 DQ11 DQ15 2.5VDD 2.5VDD 2.5VDD CK0# DQ16 DQ20 DQ17 DQ21 2.5VDD 2.5VDD DQS2 DQ18 DQ22 Satellite P20-25 Series Maintenance Manual...
  • Page 216 Signal name Pin No. Signal Name DQ19 DQ23 DQ24 DQ28 2.5VDD 2.5VDD DQ25 DQ29 DQS3 DQ26 DQ30 DQ27 DQ31 2.5VDD 2.5VDD DQS8 2.5VDD 2.5VDD DU/RESET# CK2# 2.5VDD 2.5VDD 2.5VDD CKE1 CKE0 DU/A13 DU/BA2 2.5VDD 2.5VDD Satellite P20-25 Series Maintenance Manual...
  • Page 217 DQS4 DQ34 DQ38 DQ35 DQ39 DQ40 DQ44 2.5VDD 2.5VDD DQ41 DQ45 DQS5 DQ42 DQ46 DQ43 DQ47 2.5VDD 2.5VDD 2.5VDD CK1# DQ48 DQ52 DQ49 DQ53 2.5VDD 2.5VDD DQS6 DQ50 DQ54 DQ51 DQ55 DQ56 DQ60 2.5VDD 2.5VDD Satellite P20-25 Series Maintenance Manual...
  • Page 218 Table C-1 SODIMM I/F pin assignments (144-pin) (4/4) Pin No. Signal name Pin No. Signal Name DQ57 DQ61 DQS7 DQ58 DQ62 DQ59 DQ63 2.5VDD 2.5VDD 3.3VDD_SPD VDD_ID Satellite P20-25 Series Maintenance Manual...

  • Page 219: Jp1 Lcd I/F (40-Pin

    Signal name Pin No. Signal Name PID3 PID2 PID1 PID0 TZCLK- TZCLK+ TZOUT3- TZOUT3+ TZOUT2- TZOUT2+ TZOUT1- TZOUT1+ TZOUT0- TZOUT0+ TXCLK- TXCLK+ TXOUT3- TXOUT3+ TXOUT2- TXOUT2+ TXOUT1- TXOUT1+ TXOUT0- TXOUT0+ +LCDVDD +LCDVDD DISPOFF# B_INVT_PWM DAC_BRIG Satellite P20-25 Series Maintenance Manual...

  • Page 220: Jp15 Rgb I/F (15-Pin

    Table C-3 RGB I/F pin assignments (15-pin) Pin No. Signal name Pin No. Signal Name CRTRED; 100 CRTGREEN; 100 CRTBLUE; 100 GND (VGAGND) GND (VGAGND) GND (VGAGND) DDCSDA; 100 CHSYNC; 100 CVSYNC; 100 DDCSCL; 100 Satellite P20-25 Series Maintenance Manual...

  • Page 221: Jp34 Hdd I/F (44-Pin

    Pin No. Signal Name PIDE-RST PDD07 PDD08 PDD06 PDD09 PDD05 PDD10 PDD04 PDD11 PDD03 PDD12 PDD02 PDD13 PDD01 PDD14 PDD00 PDD15 PDDREQ PDIOW PDIOR PIORDY PCSEL PDDACK RQ14 PDA1 PDA0 PDA2 PDCS1 PDCS3 PHDDLED +5VS +5VS Satellite P20-25 Series Maintenance Manual...

  • Page 222: Jp28 Main Module I/F (60-Pin

    CDD15 CDD00 CD_DREQ PDIAG CD_SDIOR# CD_SIOW# CD_DACK# CD_SIORDY CD_SBA2 CD_IRQ CD_SCS3# CD_SBA1 EXTID0 CD_SBA0 EXTID1 CD_SCS1# SHDD_LED HDSEL# EXTCSEL1 WGATE# USBP7+ RDATA# USBP7- TRACK0# FDDIR# WDATA# 3MODE# STEP# +5VCD MTR0# +5VCD DSKCHG# INDEX# DRV0# +5VCD Satellite P20-25 Series Maintenance Manual...

  • Page 223: Jp29 Second Module I/F (60-Pin

    IDE_SD09 IDE_SD06 IDE_SD10 IDE_SD05 IDE_SD11 IDE_SD04 IDE_SD12 IDE_SD03 IDE_SD13 IDE_SD02 IDE_SD14 IDE_SD01 IDE_SD15 IDE_SD00 IDE_SDREQ PDIAG IDE_SDIOR# IDE_SIOW# IDE_SDACK# IDE_SIORDY IDE_SDA2 IDE_SIRQ15 IDE_SCS3# IDE_SBA1 EXTID2 IDE_SBA0 EXTID3 IDE_SCS1# SHDD_LED EXTCSEL2 USBP3+ USBP3- +5VS +5VS +5VS Satellite P20-25 Series Maintenance Manual...

  • Page 224: Jp14 Parallel I/F (25-Pin

    STROB; 000 PDB00; 100 PDB01; 100 PDB02; 100 PDB03; 100 PDB04; 100 PDB05; 100 PDB06; 100 PDB07; 100 ACK; 000 BUSY; 100 PE; 100 SELCT; 100 AUTFD; 000 ERROR; 000 PINIT; 000 SLIN; 000 C-10 Satellite P20-25 Series Maintenance Manual...

  • Page 225: Jp21 Pc Card I/F (150-Pin

    S2 A4 S1 WAIT# S2 WAIT# S1 A5 S2 A5 S1 RST S2 RST S1 A6 S2 A6 S1 VS2 S2 VS2 S1 A7 S2 A7 S1 A25 S2 A25 S1 A12 S2 A12 Satellite P20-25 Series Maintenance Manual C-11...
  • Page 226 S2 A9 S1 IORD# S2 IORD# S1 A11 S2 A11 S1 VS1 S2 VS1 S1 OE# S2 OE# S1 CE2# S2 CE2# S1 A10 S2 A10 S1 D15 S2 D15 S1 CE1# S2 CE1# C-12 Satellite P20-25 Series Maintenance Manual...
  • Page 227 S2 D7 S1 D13 S2 D13 S1 D6 S2 D6 S1 D12 S2 D12 S1 D5 S2 D5 S1 D11 S2 D11 S1 D4 S2 D4 S1 CD1# S2 CD1# S1 D3 S2 D3 Satellite P20-25 Series Maintenance Manual C-13...

  • Page 228: Jp27 Mini Pci I/F (124-Pin

    Pin No. Signal Name SWITCH IRQA +5VS IRQD GNGNDD 3.3V AVX PCICLK MINI-SRT REQ2 AD31 WLANME AD29 AD30 AD27 AD25 AD28 AD26 CBE3 AD24 AD23 AD19 AD21 AD22 AD19 AD20 AD17 AD18 CBE2; 000 AD16 C-14 Satellite P20-25 Series Maintenance Manual...
  • Page 229 Pin No. Signal name Pin No. Signal Name IRDY FRAME CLKRUN TRDY SERR STOP DEVSEL CBE1 AD14 AD15 AD13 AD12 AD11 AD10 AD09 AD08 CBE0 AD07 AD06 AD05 AD04 AD02 AD03 AD00 AD01 MPCACT 3.3VAUX Satellite P20-25 Series Maintenance Manual C-15...

  • Page 230: Jp22, Jp23, Jp25 Fan I/F (3-Pin

    Table C-10 AC Adaptor Connector pin assignments (3-pin) Pin No. Signal name Pin No. Signal Name DCIN C.12 Microphone (6-pin) Table C-11 Microphone I/F pin assignments (6-pin) Pin No. Signal name Pin No. Signal Name ANGND BIAS ANGND C-16 Satellite P20-25 Series Maintenance Manual...

  • Page 231: Headphone Connector (6-Pin

    C.13 Headphone Connector (6-pin) Table C-12 Headphone Connector pin assignments (6-pin) Pin No. Signal name Pin No. Signal Name ANGND INTSPKL INTSPKR NBA PLUG Satellite P20-25 Series Maintenance Manual C-17...
  • Page 232 C-18 Satellite P20-25 Series Maintenance Manual...

  • Page 233: Appendix D Keyboard Scan/Character Codes

    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 P20-25 Series Maintenance Manual...
  • Page 234 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 P20-25 Series Maintenance Manual...
  • Page 235 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(L) Alt (L) Space ALT (R) Ctrl(R) ← Home ↑ ↓ PgUp PgDn → Satellite P20-25 Series Maintenance Manual...
  • Page 236 5. * This key corresponds to key No. 42 in a 102-key model. 6. * Refer to Table D-6, No. 124 key scan code. 7. * Refer to Table D-7, No. 126 key scan code. Satellite P20-25 Series Maintenance Manual...
  • Page 237 Shift key, scan codes are changed as listed below: With left Shift With right Shift Set 1 E0 AA ___________E0 B6 E0 2A ____________E0 36 Set 2 E0 F0 12 _________E0 F0 59 E0 12 ____________E0 59 Satellite P20-25 Series Maintenance Manual...
  • Page 238 E0 2A E0 5D E0 DD E0 AA E0 12 E0 2F E0 F0 2F E0 F0 12 Table D-4 Scan codes with Fn key Code set 1 Code set 2 Keytop Make Break Make Break L-CTRL L-ALT ARROW NUMERIC Scrl Satellite P20-25 Series Maintenance Manual...
  • Page 239 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 Common Ctrl + Shift + Alt + Satellite P20-25 Series Maintenance Manual...
  • Page 240 Table D-7 No.126 key scan code Key top Shift Code set 1 Code set 2 Make Make Pause Common Ctrl *: This key generates only make codes. Satellite P20-25 Series Maintenance Manual...

  • Page 241: Appendix E Key Layout

    Appendix E Appendix E Key Layout United States (US) Keyboard Figure E-1 US keyboard United Kingdom (UK) Keyboard Figure E-2 UK keyboard Satellite P20 Series Maintenance Manual...

  • Page 242: Spanish (Sp) Keyboard

    Spanish (SP) Keyboard Figure E-3 SP keyboard Japanese (JA) Keyboard Figure E-3 JA keyboard Satellite P20 Series Maintenance Manual...

  • Page 243: Korean (Ko) Keyboard

    Korean (KO) Keyboard Figure E-3 KO keyboard Satellite P20 Series Maintenance Manual...
  • Page 244 Satellite P20 Series Maintenance Manual...

  • Page 245: Appendix F Series Screw Torque List

    BACK SIDE IO DOOR TO LL MACK25040Z0 M2.5*4 BOTTOM SIDE LL TO LU BOTTOM MACK25040Z0 M2.5*4 SIDE MACK25040Z0 M2.5*4 HDD ASSY TO LL FDD NEC SUB- MACK25040Z0 M2.5*4 ASSY FDD TEAC SUB- MACK25040Z0 M2.5*4 ASSY Satellite P20-25 Series Maintenance Manual...
  • Page 246 BADY FRAME TO LL MAAA0015320 M2*3 TOP SIDE DIRECT PCB TO MAAA0015320 M2*3 DIRECT BKT DIRECT PCB w/BKT MAAA0015320 M2*3 TO DIRECT PLAY DOOR MAAA0015320 M2*3 TUNER/HOUSING 2ND HDD MAAA0015320 M2*3 /HOUSING MACK20040N0 M2*4 PCMCIA TO MB Satellite P20-25 Series Maintenance Manual...
  • Page 247 HOUSING 2ND HDD MAAA4303000 M3*3 /HOUSING IO DOOR TO LL MAFA94001N0 D-SUB NUT BACK SIDE DVD MODULE MKE MAA00002800 D1.7*2.5 / HOUSING/PANEL COMBO MODULE MAAAA173500 M1.7*3.5 /HOUSING/PANEL BTQ00_BATTERY_A FATQ00AD000 M2.5*6 SSY_WEIGHT_SAV BTQ00_BATTERY_A FATQ00AD000 M2.5*4 SSY_WEIGHT_SAV Satellite P20-25 Series Maintenance Manual...
  • Page 248 Satellite P20-25 Series Maintenance Manual...

  • Page 249: Appendix G Reliability

    Appendix G Appendix G Reliability The following table shows MTBF (Mean Time Between Failures) for each component. Table G-1 MTBF Component Time (hours) 50,000 Keyboard 40,000 300,000 Removable FDD 30,000 Optical (DVD/CD) drive 60,000 AC adapter 60,000 Satellite P20 Series Maintenance Manual...
  • Page 250 Satellite P20 Series Maintenance Manual...

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