Hitachi M300N User manual

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Notebook Computer
M300N/M310N
Service Manual

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Notice
The company reserves the right to revise this publication or to change its contents without notice. Information contained
herein is for reference only and does not constitute a commitment on the part of the manufacturer or any subsequent ven-
dor. They assume no responsibility or liability for any errors or inaccuracies that may appear in this publication nor are
they in anyway responsible for any loss or damage resulting from the use (or misuse) of this publication.
This publication and any accompanying software may not, in whole or in part, be reproduced, translated, transmitted or
reduced to any machine readable form without prior consent from the vendor, manufacturer or creators of this publica-
tion, except for copies kept by the user for backup purposes.
Brand and product names mentioned in this publication may or may not be copyrights and/or registered trademarks of
their respective companies. They are mentioned for identification purposes only and are not intended as an endorsement
of that product or its manufacturer.
Version 1.0
June 2003
Trademarks
Intel®and Pentium®are registered trademarks of Intel Corporation.
Windows®is a registered trademark of Microsoft Corporation.
Other brand and product names are trademarks and./or registered trademarks of their respective companies.

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About this Manual
This manual is intended for service personnel who have completed sufficient training to undertake the maintenance and
inspection of personal computers.
It is organized to allow you to look up basic information for servicing and/or upgrading components of the M300N/
M310N series notebook PC.
The following information is included:
Chapter 1, Introduction, provides general information about the location of system elements and their specifications.
Chapter 2, Disassembly, provides step-by-step instructions for disassembling parts and subsystems and how to upgrade
elements of the system.
Appendix A, Part Lists
Appendix B, Schematic Diagrams
Appendix C, Updating the FLASH ROM BIOS

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IMPORTANT SAFETY INSTRUCTIONS
When using your telephone equipment, basic safety precautions should always be followed to reduce the risk of fire, elec-
tric shock and injury to persons, including the following:
1. Do not use this product near water, for example near a bath tub, wash bowl, kitchen sink or laundry tub, in a wet
basement or near a swimming pool.
2. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of elec-
trical shock from lightning.
3. Do not use the telephone to report a gas leak in the vicinity of the leak.
4. Use only the power cord and batteries indicated in this manual. Do not dispose of batteries in a fire. They may
explode. Check with local codes for possible special disposal instructions.
5. This product is intended to be supplied by a Listed Power Unit (DC Output 20V, 3.25A).
CAUTION
Always disconnect all telephone lines from the wall outlet before servicing or disassembling this equipment.
TO REDUCE THE RISK OF FIRE, USE ONLY NO. 26 AWG OR LARGER,
TELECOMMUNICATION LINE CORD

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Instructions for Care and Operation
The notebook computer is quite rugged, but it can be damaged. To prevent this, follow these suggestions:
1. Don’t drop it, or expose it to shock. If the computer falls, the case and the components could be damaged.
2. Keep it dry, and don’t overheat it. Keep the computer and power supply away from any kind of heating element. This
is an electrical appliance. If water or any other liquid gets into it, the computer could be badly damaged.
3. Follow the proper working procedures for the computer. Shut the computer down properly and don’t forget to save
your work. Remember to periodically save your data as data may be lost if the battery is depleted.
Do not expose the computer
to any shock or vibration.
Do not place it on an unstable
surface.
Do not place anything heavy
on the computer.
Do not expose it to excessive
heat or direct sunlight.
Do not leave it in a place
where foreign matter or mois-
ture may affect the system.
Don’t use or store the com-
puter in a humid environment.
Do not place the computer on
any surface which will block
the vents.
Do not turn off the power
until you properly shut down
all programs.
Do not turn off any peripheral
devices when the computer is
on.
Do not disassemble the com-
puter by yourself.
Perform routine maintenance
on your computer.

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4. Avoid interference. Keep the computer away from high capacity transformers, electric motors, and other strong mag-
netic fields. These can hinder proper performance and damage your data.
5. Take care when using peripheral devices.
Power Safety
The computer has specific power requirements:
• Only use a power adapter approved for use with this computer.
• Your AC adapter may be designed for international travel but it still requires a steady, uninterrupted power supply. If you are
unsure of your local power specifications, consult your service representative or local power company.
• The power adapter may have either a 2-prong or a 3-prong grounded plug. The third prong is an important safety feature; do
not defeat its purpose. If you do not have access to a compatible outlet, have a qualified electrician install one.
• When you want to unplug the power cord, be sure to disconnect it by the plug head, not by its wire.
• Make sure the socket and any extension cord(s) you use can support the total current load of all the connected devices.
• Before cleaning the computer, make sure it is disconnected from any external power supplies.
Use only approved brands of
peripherals.
Unplug the power cord before
attaching peripheral devices.
Do not plug in the power
cord if you are wet.
Do not use the power cord if
it is broken.
Do not place heavy objects
on the power cord.
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Power Safety
Warning
Before you undertake
any upgrade proce-
dures, make sure that
you have turned off the
power, and discon-
nected all peripherals
and cables (including
telephone lines). It is
advisable to also re-
move your battery in
order to prevent acci-
dentally turning the
machine on.

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Battery Precautions
• Only use batteries designed for this computer. The wrong battery type may explode, leak or damage the computer.
• Recharge the batteries using the notebook’s system. Incorrect recharging may make the battery explode.
• Do not try to repair a battery pack. Refer any battery pack repair or replacement to your service representative or qualified service
personnel.
• Keep children away from, and promptly dispose of a damaged battery. Always dispose of batteries carefully. Batteries may explode
or leak if exposed to fire, or improperly handled or discarded.
• Keep the battery away from metal appliances.
• Affix tape to the battery contacts before disposing of the battery.
• Do not touch the battery contacts with your hands or metal objects.
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Battery Disposal
The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of
its useful life, under various state and local laws, it may be illegal to dispose of this battery into the municipal
waste stream. Check with your local solid waste officials for details in your area for recycling options or proper
disposal.
Caution
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommend-
ed by the manufacturer. Discard used battery according to the manufacturer’s instructions.

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Related Documents
You may also need to consult the following manual for additional information:
User’s Manual on CD
This describes the notebook PC’s features and the procedures for operating the computer and its ROM-based setup pro-
gram. It also describes the installation and operation of the utility programs provided with the notebook PC.

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Contents
Introduction ..............................................1-1
Overview .........................................................................................1-1
System Specifications .....................................................................1-2
Processor Options ............................................................................1-2
Core Logic .......................................................................................1-2
Structure ..........................................................................................1-2
Security ............................................................................................1-2
Memory ...........................................................................................1-2
BIOS ................................................................................................1-2
LCD .................................................................................................1-2
Display ............................................................................................1-2
Storage .............................................................................................1-2
PC Card ...........................................................................................1-2
Audio ...............................................................................................1-3
Keyboard .........................................................................................1-3
Interface ...........................................................................................1-3
Communication ...............................................................................1-3
Power Management .........................................................................1-3
Power ...............................................................................................1-3
Indicators .........................................................................................1-3
Buttons ............................................................................................1-3
Environmental Spec ........................................................................1-4
Physical Dimensions .......................................................................1-4
Weight .............................................................................................1-4
Optional ...........................................................................................1-4
Design Differences ..........................................................................1-4
External Locator - Top View ..........................................................1-5
External Locator - Front & Left Side Views ...................................1-6
External Locator - Right Side & Rear Views ..................................1-7
External Locator - Bottom View .....................................................1-8
Mainboard Overview - Top (Key Parts) ......................................... 1-9
Mainboard Overview - Bottom (Key Parts) ................................. 1-10
Mainboard Overview - Top (Connectors) .................................... 1-11
Mainboard Overview - Bottom (Connectors) ............................... 1-12
Disassembly ...............................................2-1
Overview ......................................................................................... 2-1
Maintenance Tools .......................................................................... 2-2
Connections .................................................................................... 2-2
Maintenance Precautions ................................................................ 2-3
Disassembly Steps .......................................................................... 2-4
Removing the Battery ..................................................................... 2-7
Removing the Hard Disk Drive and Wireless LAN ....................... 2-8
Removing the System Memory (RAM) ....................................... 2-10
Removing the CD Device ............................................................. 2-12
Removing the Modem .................................................................. 2-13
Removing the Processor ............................................................... 2-14
Removing the Keyboard ............................................................... 2-16
Removing the Bottom Case .......................................................... 2-17
Removing the Audioboard ............................................................ 2-18
Removing the Multi-function board ............................................. 2-19
Removing the Mainboard ............................................................. 2-20
Removing the TouchPad and Click Board ................................... 2-21
Removing the Inverter .................................................................. 2-22
Removing the Speakers ................................................................ 2-23
Removing the LCD Panel ............................................................. 2-24
Removing the PC Camera Module ............................................... 2-24
Part Lists ..................................................A-1
Part List Illustration Location ........................................................ A-2
Top (M300N) ................................................................................. A-3