Toshiba NB255 - Manual

Toshiba NB255

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Table of Contents:

  • Page 2 – Copyright; Toshiba Personal Computer NB250/NB255 Maintenance Manual; Disclaimer
  • Page 3 – Preface; SAFETY PRECAUTIONS
  • Page 4 – Conventions; Acronyms; boldface; Key operation
  • Page 5 – means you must hold down; Ctrl; and at the same time press
  • Page 6 – Table of Contents; Chapter 1 Hardware Overview
  • Page 7 – Chapter 3 Tests and Diagnostics; Configuration
  • Page 8 – Chapter 4
  • Page 10 – Figures
  • Page 11 – Figure 4.34 Removing the LVDS cable from the LCD module; Appendices; Appendix E
  • Page 13 – Hardware Overview; Chapter 1
  • Page 16 – Features
  • Page 19 – Figure 1-1A ID Parts Description Placement Part A
  • Page 23 – Item
  • Page 24 – Power Supply
  • Page 26 – Batteries; The computer has the following two types of batteries:; Main Battery; Battery Charge; State Charge
  • Page 27 – RTC Battery
  • Page 30 – Troubleshooting Procedures; Chapter 2
  • Page 31 – Figure 2-13 CRT troubleshooting process .......................................................39; Tables
  • Page 32 – Troubleshooting Introduction
  • Page 38 – Power Supply Troubleshooting; Figure 2-2 Power Supply Troubleshooting Process
  • Page 39 – Procedure 1; Table 2-1 Battery LED
  • Page 40 – Power supply status
  • Page 41 – Procedure 3
  • Page 42 – Procedure 4; Reinstall the battery pack.; Procedure 5; Replacement Procedures
  • Page 43 – Display Troubleshooting; Figure 2-3 Display troubleshooting process
  • Page 44 – Tests and
  • Page 45 – Replacement Procedures,
  • Page 46 – Keyboard Troubleshooting; Figure 2-4 Keyboard troubleshooting process
  • Page 47 – test and Diagnostics
  • Page 48 – External USB Devices Troubleshooting; Figure 2-5 External USB device troubleshooting process
  • Page 50 – TouchPad Troubleshooting; Figure 2-6 Touchpad troubleshooting process
  • Page 51 – Procedure 2
  • Page 52 – Speaker Troubleshooting; Figure 2-7 Speaker troubleshooting process
  • Page 54 – Wireless LAN Troubleshooting; Figure 2-8 Wireless LAN troubleshooting process
  • Page 55 – Replacement
  • Page 56 – Camera Troubleshooting; Figure 2-9 Camera troubleshooting process
  • Page 58 – Bluetooth Troubleshooting; Figure 2-10 Bluetooth troubleshooting process
  • Page 60 – in1 card Troubleshooting; Figure 2-11 2in 1 card troubleshooting process
  • Page 65 – CRT Troubleshooting; Figure 2-13 CRT troubleshooting process
  • Page 67 – LAN Troubleshooting; Figure 2-14 LAN troubleshooting process
  • Page 68 – MIC Troubleshooting
  • Page 70 – D Sensor Troubleshooting
  • Page 73 – 7 3G Troubleshooting; Figure 2-17 3G troubleshooting process
  • Page 75 – Tests and Diagnostics; Chapter 3
  • Page 77 – The Diagnostic Test; NOTES: To start the diagnostics, follow these steps
  • Page 78 – Executing the Diagnostic Test
  • Page 82 – Display Configuration; This Item will show the unit configuration. It includes:
  • Page 83 – Tests and Diagnostics; Audio sound test; Buffalo only have one speaker, no need test Left/Right Speaker
  • Page 85 – Main Battery Charge Test; . 30W with 19V DC for ALL SKU; This test shows and measures the main battery:
  • Page 88 – check; Before Memory test start, you should choice the below item:
  • Page 92 – LCD Pixels Mode Test; This LCD pixels mode test checks whether video display is fine.
  • Page 93 – Magnetic Switch Test; Follow below steps to run this test:
  • Page 100 – Test Result
  • Page 102 – HDD Test; The HDD test allows the user to verify the 1; HDD ok or not. First, please select HDD test
  • Page 107 – Toshiba Logo set; Set the computer’s Toshiba Logo for other region except Japan SKU.
  • Page 109 – Dynabook Logo set; Set the computer’s Dynabook Logo for Japan SKU.
  • Page 122 – Replacement Procedures
  • Page 127 – General; For removing the
  • Page 128 – Safety Precautions
  • Page 130 – Before You Begin; Disassemble the laptop only when an abnormality has occurred.
  • Page 131 – Disassembly Procedures; The cable connectors come in these two basic types:; Assembly Procedures; Check that all the cable and connectors are fastened securely.
  • Page 132 – Tools and Equipment
  • Page 133 – Colors of Screw Shanks
  • Page 134 – Battery; Removing the Battery Pack; Turn the laptop upside down so that the bottom is facing you.
  • Page 135 – Installing the Battery Pack; Install the battery pack according to the following procedures.
  • Page 136 – HDD; Removing the HDD; Figure 4.2 Removing the HDD door
  • Page 138 – Installing the HDD; Install the HDD according to the following procedures.
  • Page 139 – Memory; Removing the Optional Memory; Turn the laptop upside down.
  • Page 140 – Installing the Optional Memory; Reinstall the optional RAM door.
  • Page 141 – WLAN Card; Removing the WLAN Card; Detach the two antennas on the WLAN card.
  • Page 142 – Installing the WLAN Card; Install the WLAN card according to the following procedures.
  • Page 143 – Hinge Cover and Keyboard; Remove the following twelve screws as shown in Figure 4.8:
  • Page 144 – Removing the Hinge Cover; Remove the hinge cover according to the following procedures.
  • Page 145 – Removing the Keyboard; Remove the keyboard.
  • Page 146 – Installing the Hinge Cover and Keyboard; Secure the laptop with twelve screws as indicated in Figure 4.8:
  • Page 147 – Power Board; Removing the Power Board; Remove the power board cable from the motherboard.
  • Page 148 – Installing the Power Board; Install the power board according to the following procedures.
  • Page 149 – Logic Upper Assembly; Removing the Logic Upper Assembly; Remove four 2.5x6 screws from the logic upper assembly.
  • Page 153 – Installing the Logic Upper Assembly; Connect the Thermal Fan cable.
  • Page 155 – Speaker; Removing the Speaker; Figure 4.18 Removing the speaker; Installing the Speaker; Install the speaker according to the following procedures.
  • Page 156 – Touch Pad; Removing the touch pad bracket; Figure 4.19 Removing the screws from the touch pad bracket; Installing the Touch Pad Bracket; Seat the touch pad bracket in the correct position,
  • Page 157 – Motherboard; Removing the Motherboard; Figure 4.20 Removing the motherboard from logic lower assembly
  • Page 160 – Installing the Motherboard; Figure 4.24 Aligning the motherboard connectors
  • Page 162 – Thermal Fan Module; Removing the Thermal Fan Module; When removing the thermal fan module, keep the following in mind:
  • Page 163 – Installing the Thermal Fan Module; Figure 4.27 Applying the thermal pad on the thermal module
  • Page 164 – LCD Bezel Assembly; Removing the LCD Bezel Assembly; Remove the two mask seals that cover the screws.; Figure 4.28 Removing screws from the LCD Bezel Assembly
  • Page 166 – Installing the LCD Bezel Assembly; Seat the LCD bezel assembly in the correct position.
  • Page 167 – LCD Module; Removing the LCD Module; Figure 4.31 Removing the screws from the LCD module
  • Page 169 – Installing the LCD Module; Install the LCD module according to the following procedures.
  • Page 170 – Camera module LVDS cable; Removing the Camera module and LVDS Cable; Figure 4.33 Removing the Camera from the LCD panel
  • Page 172 – Installing the Camera module and LVDS Cable; Adhere the LVDS cable in the correct position on the LCD module.
  • Page 173 – Appendix A Handling the LCD Module; Precautions for handling the LCD module
  • Page 178 – Appendix B Board Layout; B.1 System Board Top View
  • Page 179 – B.2 System Board Bottom View
  • Page 180 – Number Name
  • Page 182 – Appendix C Pin Assignments; System Board; JLVDS; Signal name
  • Page 183 – JCRT; JSATA
  • Page 184 – JWLAN
  • Page 185 – JLAN; LAN
  • Page 190 – JMIC; Internal Microphone; JLINE; HEADPHONE
  • Page 194 – Appendix D Keyboard Scan/Character Codes
  • Page 197 – * Scan codes differ by overlay function.; key gives different codes.; Fn; key does not generate a code by itself.
  • Page 198 – Table D-2 Scan codes with left Shift key; Shift
  • Page 200 – Table D-5 Scan codes in overlay mode; Code set 1
  • Page 202 – Appendix E Key Layout; Figure US keyboard
  • Page 204 – Figure UK keyboard
  • Page 211 – Figure GK keyboard
  • Page 213 – Figure TR keyboard
  • Page 216 – Figure ND keyboard
  • Page 219 – Figure JP keyboard
  • Page 220 – Appendix F Series Screw Torque List (PAV10); Table F-1 Series Screw Torque List; SCREW SPEC
  • Page 222 – Appendix G Reliability; Component Time
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Toshiba Personal Computer

NB250/NB255

Maintenance Manual

TOSHIBA CORPORATION

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Summary

Page 2 - Copyright; Toshiba Personal Computer NB250/NB255 Maintenance Manual; Disclaimer

Copyright © 2010 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. Toshiba Personal Computer ...

Page 3 - Preface; SAFETY PRECAUTIONS

NB250/NB255 Series Maintenance Manual iii Preface This maintenance manual describes how to perform hardware service maintenance for the Toshiba Personal Computer Satellite, referred to as the Satellite Series in this manual. The procedures described in this manual are intended to help service techni...

Page 4 - Conventions; Acronyms; boldface; Key operation

NB250/NB255 Series Maintenance Manual iv The manual is divided into the following parts: Chapter 1 Hardware Overview describes the Satellite Series system unit and each FRU. Chapter 2 Troubleshooting Procedures explains how to diagnose and resolve FRU problems. Chapter 3 Test and Diagnostics describ...

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