Toshiba mini NB300 User manual

Toshiba Personal Computer
NB300
Maintenance Manual
TOSHIBA CORPORATION
[CONFIDENTIAL]

ii [CONFIDENTIAL] NB300 SERIES MAINTENANCE MANUAL
Copyright
© 2009 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 NB300 SERIES MAINTENANCE MANUAL Maintenance Manual
First edition Nov. 2009
Disclaimer
The information presented in this manual has been reviewed and validated for accuracy. The
included set of instructions and descriptions are accurate for the NB300 SERIES
MAINTENANCE MANUAL Series at the time of this manual's production. However,
succeeding computers and manuals are subject to change without notice. Therefore, Toshiba
assumes no liability for damages incurred directly or indirectly from errors, omissions, or
discrepancies between any succeeding product and this manual.
Trademarks
IBM is a registered trademark, and OS/2 and PS/2 are trademarks of IBM Corporation.
Microsoft, MS-DOS, Windows, DirectSound and DirectMusic are registered trademarks of
Microsoft Corporation.
Intel and Pentium are registered trademarks, and SpeedStep is a trademark of Intel Corporation.
Sound Blaster is a registered trademark of Creative Technology Ltd.
Centronics is a registered trademark of Centronics Data Computer Corporation.
Photo CD is a trademark of Eastman Kodak.
All other properties are trademarks or registered trademarks of their respective holders.

NB300 SERIES MAINTENANCE MANUAL [CONFIDENTIAL] iii
Preface
This maintenance manual describes how to perform hardware service maintenance for the Toshiba
Personal Computer NB300 SERIES MAINTENANCE MANUAL, referred to as the NB300
SERIES MAINTENANCE MANUAL 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.
SAFETY PRECAUTIONS
Four types of messages are used in this manual to bring important information to your attention.
Each of these messages will be italicized and identified as shown below.
DANGER: “Danger” indicates the existence of a hazard that could result in death or
serious bodily injury if the safety instruction is not observed.
WARNING: “Warning” indicates the existence of a hazard that could result in bodily
injury if the safety instruction is not observed.
CAUTION: “Caution” indicates the existence of a hazard that could result in property
damage if the safety instruction is not observed.
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.
Be sure to fasten screws securely with the right screwdriver. If a screw is not fully
fastened, it could come loose, creating a danger of a short circuit, which could cause
overheating, smoke or fire.
If you replace the battery pack or RTC battery, be sure to use only the same model battery
or an equivalent battery recommended by Toshiba. Installation of the wrong battery can
cause the battery to explode.

iv [CONFIDENTIAL] NB300 SERIES MAINTENANCE MANUAL
The manual is divided into the following parts:
Chapter 1 Hardware Overview describes the NB300 SERIES MAINTENANCE
MANUAL 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.
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
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. The key top symbol as it appears on the
keyboard is printed in boldface type.
Key operation

NB300 SERIES MAINTENANCE MANUAL [CONFIDENTIAL] v
Some operations require you to simultaneously use two or more keys. We identify such operations
by the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause (Break) means
you must hold down Ctrl and at the same time press Pause (Break). If three keys are used, hold
down the first two and at the same time press the third.
User input
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 typeface below:
Format complete
System transferred

vi [CONFIDENTIAL] NB300 SERIES MAINTENANCE MANUAL
Table of Contents
Chapter 1
1.1 Features............................................................................................................................ 1-1
1.2 2.5-inch HDD................................................................................................................... 1-9
1.3 Power Supply ................................................................................................................ 1-10
1.4 Batteries ......................................................................................................................... 1-12
1.4.1 Main Battery .................................................................................................................. 1-12
1.4.2 Battery Charging Control .............................................................................................. 1-12
1.4.3 RTC Battery................................................................................................................... 1-13
Chapter 2
2.1 Troubleshooting Introduction ..............................................................................................3
2.2 Troubleshooting Flowchart..................................................................................................3
2.3 Power Supply Troubleshooting............................................................................................9
2.4 Display Troubleshooting....................................................................................................14
2.5 Keyboard Troubleshooting ................................................................................................17
2.6 External USB Devices Troubleshooting............................................................................19
2.7 TouchPad Troubleshooting.................................................................................................21
2.8 Speaker Troubleshooting ....................................................................................................23
2.9 Wireless LAN Troubleshooting .........................................................................................25
2.10 Camera troubleshooting......................................................................................................27
2.11 Bluetooth Troubleshooting .................................................................................................29
2.12 2 in 1 card Troubleshooting................................................................................................31
2-13 HDD/SSD troubleshooting process....................................................................................33
2-14 CRT failure troubleshooting process .................................................................................35
2-15 LAN troubleshooting process………………………….....................……………………37
2-16 MIC troubleshooting process ………………………… ....................……………………39
2-17 3D sensor troubleshooting process……………………….............……………………….41
2-18 3G troubleshooting process……………………………… .................……………………43

NB300 SERIES MAINTENANCE MANUAL [CONFIDENTIAL] vii
Chapter 3
3.1 The Diagnostic Test ............................................................................................................ 2
3.2 Executing the Diagnostic Test ............................................................................................ 3
3.3 Display Configuration ........................................................................................................ 7
3.4 Audio sound Test ................................................................................................................ 8
3.5 Fan ON/OFF Test................................................................................................................ 8
3.6 Main Battery Charge Test ................................................................................................. 10
3.7 FDD Test....................................................................................................................... …11
3.8 Memory Check.................................................................................................................. 13
3.9 Keyboard Test ................................................................................................................... 13
3.10 Mouse (Pad) Test .............................................................................................................. 16
3.11 LCD Pixels Mode Test...................................................................................................... 17
3.12 Magnetic switch Test ........................................................................................................ 18
3.13 LAN Test........................................................................................................................... 20
3.14 RTC Test ........................................................................................................................... 23
3.15 3D-Gsensor……..…………...………….…….……………..……………...…….............24
3.16 1st HDDTest ……………………………....…………….……………....….…………....27
3.17 RDMI Test………………...………………………….………………...…..……………..29
3.18 WDMI Test ………….…………………………….…………….…....….…...…………30
3.19 Toshiba Logo set……………………………….................................................................32
3.20 Dynabook Logo set……………………………………………….………………...……..34
3.21 TP type RW Test…….…………………………………………….……………………...37
Chapter 4
4.1 General ............................................................................................................................... 4-1
Safety Precautions............................................................................................................ 4-2
Before You Begin................. .......................................................................................... 4-4
Disassembly Procedures .................................................................................................. 4-5
Assembly Procedures....................................................................................................... 4-5
Tools and Equipment ....................................................................................................... 4-6

viii [CONFIDENTIAL] NB300 SERIES MAINTENANCE MANUAL
Screw Tightening Torque ............................................................................................... 4-6
Colors of Screw Shanks . ............................................................................................... 4-7
Symbols of Screws on the Laptop Body. ...................................................................... 4-7
Symbol examples........................................................................................................... 4-7
4.2 Battery................... ................................................................................ ............................4-8
Removing the Battery Pack .................................................................................... ...... 4-8
Installing the Battery Pack............................................................................................. 4-9
4.3 WLAN Card..................................................................................................................... 4-10
Removing the WLAN Card. ....................................................................................... 4-10
Installing the WLAN Card ................... .............................................................. ...... 4-12
4.4 WWAN Card ................................................................................................................... 4-13
Removing the WWAN Card ...................................................................................... .4-13
Installing the WWAN Card ........................................................................................ 4-14
4.5 HDD 4-15
Removing the HDD ..................................................................................................... 4-15
Installing the HDD ........................................................ 4-17
4.6 Memory............................................................................................................................ 4-18
Removing the Optional Memory................................................................................. 4-18
Installing the Optional Memory ................................................................................. 4-19
4.7 Hinge Cover and Keyboard ............................................................................................. 4-20
Removing the Hinge Cover. ....................................................................................... 4-20
Removing the Keyboard.............................................................................................. 4-21
Installing the Hinge Cover and Keyboard ................................................................... 4-23
4.8 Power Board......... ..................................................................................................... .... 4-24
Removing the Power Board .......... ................................................................ ............ 4-24
Installing the Power Board.................................... .............................................. ...... 4-25
4.9 Logic Upper Assembly............. .......................................................................... ........... 4-26
Removing the Logic Upper Assembly ........... .................................................... ...... 4-26
Installing the Logic Upper Assembly ......................... .......................................... .... 4-31
4.10 Touch Pad Board............................................... ..................................................... ....... 4-32
Removing the touch pad board................ .......................................................... ........ 4-32
Installing the Touch Pad board ................ ........................................................... ...... 4-33

NB300 SERIES MAINTENANCE MANUAL [CONFIDENTIAL] ix
4.11 Bluetooth Card ...................................................... ............................................. ........... 4-34
Removing the Bluetooth card.................................... ......................................... ....... 4-34
Installing the Bluetooth Card ............................ .................................................... ...... 4-34
4.12 Speaker .................................................... ......................................................... ............. 4-35
Removing the Speaker ...................................................... ................................... ....... 4-35
Installing the Speaker..................... ........................................................................... ... 4-36
4.13 Motherboard ......................................... .......................................................... ............... 4-37
Removing the Motherboard ...................................... ....................................... ........... 4-37
Installing the Motherboard.................................................. .................................. ....... 4-39
4.14 IO Board.............................................................. ................................... ........................ 4-40
Removing the IO Board .................................... ................................... ....................... 4-40
Installing the IO Board ................................. ............................................ ....................4-41
4.15 Fan and Thermal Module............................... ................................... ............................. 4-42
Removing the Fan and the Thermal Module..................... ................ .......................... 4-42
Installing the Fan and the Thermal Module ................... ........................ ......................4-44
4.16 LCD Bezel Assembly............................................. ........................... ............................ 4-45
Removing the LCD Bezel Assembly .................................... ............. ..........................4-45
Installing the LCD Bezel Assembly........................................ ................ ......................4-48
4.17 LCD Module .................................................................................................................... 4-49
Removing the LCD Module.......................................................... ................ ............... 4-49
Installing the LCD Module .................................................. ........................... .............4-53
4.18 Camera module and Microphone ..................................... ..................... .........................4-54
Removing the Camera module and Microphone............ ............................ ................. 4-54
Installing the Camera module and Microphone ................. ...................... ................... 4-55
Figures
Figure 1-1A ID Parts Description Placement Part A ................................................................ 1-5
Figure 1-2 S-ATA HDD ......................................................................................................... 1-9
Figure 2-1 Troubleshooting flowchart (1/2)………………………… ..... …………………….5
Figure 2-1 Troubleshooting flowchart (2/2)………………………… ..... …………………….6
Figure 2-2 Power Supply Troubleshooting Process…………… ..... ………………………….9

x [CONFIDENTIAL] NB300 SERIES MAINTENANCE MANUAL
Figure 2-3 Display troubleshooting process………………… ......…………………………...14
Figure 2-4 Keyboard troubleshooting process………………………….....…………………17
Figure 2-5 External USB device troubleshooting process……………….....………………..19
Figure 2-6 TouchPad troubleshooting process………………………… .....………………...21
Figure 2-7 Speaker troubleshooting process………………......……………………………..23
Figure 2-8 Wireless LAN troubleshooting process ..................................................................25
Figure 2-9 Camera troubleshooting process .............................................................................27
Figure 2-10 Bluetooth troubleshooting process.........................................................................29
Figure 2-11 2 in 1 card troubleshooting process .......................................................................31
Figure 2-12 HDD troubleshooting process................................................................................33
Figure 2-13 CRT troubleshooting process ................................................................................35
Figure 2-14 LAN troubleshooting process ...............................................................................37
Figure 2-15 MIC troubleshooting process.................................................................................39
Figure 2-16 3D sensor troubleshooting process .........................................................................41
Figure 2-17 3G troubleshooting process.....................................................................................43
Figure 4.1 Removing the Battery Pack................................................................................... 4-8
Figure 4.2 Remove one M2.5x3 and one M2.5x10 TORX screws ...................................... 4-10
Figure 4.3 Detach two antennas and remove two screws.................................................... 4-11
Figure 4.4 Removing the WLAN card.................................................................................. 4-11
Figure 4.5 Detach two antennas and remove two screws..................................................... 4-13
Figure 4.6 Remove the WWAN card.................................................................................... 4-14
Figure 4.7 Slide the HDD pack horizontally ........................................................................ 4-15
Figure 4.8 Removing the HDD from the HDD bay.............................................................. 4-16
Figure 4.9 Removing the HDD plate .................................................................................... 4-17
Figure 4.10 Removing the RAM door .................................................................................... 4-18
Figure 4.11 Removing the RAM from the laptop................................................................... 4-19
Figure 4.12 Remove three screws........................................................................................... 4-20
Figure 4.13 Removing the hinge cover................................................................................... 4-21
Figure 4.14 Remove two screws............................................................................................. 4-21
Figure 4.15 Removing the keyboard cover............................................................................. 4-22
Figure 4.16 Pry up the keyboard............................................................................................. 4-22
Figure 4.17 Disconnect the cable............................................................................................ 4-23