Clevo M720R, M721R, M722R, M725R Service Manual
Notebook Computer
M72XR
Service Manual
Preface
Preface
I
Preface
Preface
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 vendor. 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 publication, 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
August 2007
Trademarks
Intel and Intel Core are trademarks/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.
II
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 M72XR 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.
Preface
Appendix A, Part Lists
Appendix B, Schematic Diagrams
Preface
III
Preface
Preface
IMPORTANT SAFETY INSTRUCTIONS
Follow basic safety precautions, including those listed below, to reduce the risk of fire, electric shock and injury to persons when using any electrical equipment:
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) durin g an ele ctrical sto rm. There may be a remote risk of electrical 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 19V, 3.42A or 18.5V, 3.5A AC/DC Adap ter).
CAUTION
Always disconnect all telephone lines from the wall outlet before servicing or disassembling this equipment.
IV
TO REDUCE THE RISK OF FIRE, USE ONLY NO. 26 AWG OR LARGER,
TELECOMMUNICATION LINE CORD
This Computer’s Optical Device is a Laser Class 1 Product
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.
Preface
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.
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 co mputer could be badly damaged.
Do not expose it to excessive
heat or direct sunlight.
Do not leave it in a place
where foreign matter or moisture may affect the system.
Don’t use or store the computer in a humid environment.
Do not place the computer on
any surface which will block
the vents.
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 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 computer by yourself.
Perform routine maintenance
on your computer.
Preface
V
Preface
4. Avoid interference. Keep the computer away from high capacity transformers, electric motors, and oth er strong mag-
netic fields. These can hinder proper performance and damage your data.
5. Take care when using peripheral devices.
Preface
Power Safety
Warning
Before you undertake
any upgrade procedures, make sure that
you have turned off the
power, and disconnected all peripherals
and cables (including
telephone lines). It is
advisable to also remove your battery in
order to prevent accidentally turning the
machine on.
Use only approved brands of
peripherals.
Unplug the power cord befor e
attaching 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 requ ires a steady, uninterru pted power supp ly. 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 disconn ect 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.
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.
VI
Battery Precautions
• Only use batteries designed for this computer. The wrong battery type may explode, leak or damage the computer.
• Do not continue to use a battery that has been dropped, or that appears damaged (e.g. bent or twisted) in any way. Even if the
computer continues to work with a damaged battery in place, it may cause circuit damage, which may possibly result in fire.
• 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.
Battery Disposal
The product that you have purchased contains a rechargeable b attery. The battery is recycl able. 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 i n your area for recycling options or p roper
disposal.
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Preface
Caution
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used battery according to the manufacturer’s instructions.
VII
Preface
Preface
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 program. It also describes the installation and operation of the utility programs provided with the notebook PC.
VIII
Contents
Preface
Introduction ..............................................1-1
Overview .........................................................................................1-1
System Specifications .....................................................................1-2
Model Differences ........................................................................... 1-5
External Locator - Top View with LCD Panel Open ......................1-6
External Locator - Front & Rear Views ..........................................1-7
External Locator - Left & Right Side Views ...................................1-8
External Locator - Bottom View .....................................................1-9
Mainboard Overview - Top (Key Parts) .......................................1-10
Mainboard Overview - Bottom (Key Parts) ..................................1-11
Mainboard Overview - Top (Connectors) .....................................1-12
Mainboard Overview - Bottom (Connectors) ...............................1-13
Disassembly ...............................................2-1
Overview .........................................................................................2-1
Maintenance Tools ..........................................................................2-2
Connections .....................................................................................2-2
Maintenance Precautions .................................................................2-3
Removing the Battery ......................................................................2-6
Removing the Hard Disk Drive .......................................................2-7
Removing the System Memory (RAM) ..........................................2-9
Removing the Processor ................................................................2-11
Removing the Wireless LAN Module ...........................................2-13
Removing the Bluetooth Module ..................................................2-14
Removing the Optical (CD/DVD) Device ....................................2-15
Removing the Keyboard ................................................................2-16
Removing the Modem Module .....................................................2-17
Part Lists ..................................................A-1
Part List Illustration Location ........................................................A-2
Top with Fingerprint (M720R) ......................................................A-3
Top without Fingerprint (M720R) ................................................. A-4
Top with Fingerprint (M725R) ...................................................... A-5
Top without Fingerprint (M725R) ................................................. A-6
Bottom (M72XR) ........................................................................... A-7
LCD (M720R) ............................................................................... A-8
LCD (M725R) ............................................................................... A-9
Combo (M720R) .......................................................................... A-10
DVD-DUAL-RW (M720R) ......................................................... A-11
Schematic Diagrams.................................B-1
SYSTEM BLOCK DIAGRAM ......................................................B-2
CPU-1 .............................................................................................B-3
CPU-2 .............................................................................................B-4
Crestline 1/5 ....................................................................................B-5
Crestline 2/5, DRAM ......................................................................B-6
Crestline 3/5 ....................................................................................B-7
Crestline 4/5 ....................................................................................B-8
Crestline 5/5 ....................................................................................B-9
DDRII SO-DIMM 0 .....................................................................B-10
DDRII SO- DIMM 1 ....................................................................B-11
PANEL, INVERTER, CRT ..........................................................B-12
ICH8-M 1/4, SATA ......................................................................B-13
ICH8-M 2/4, PCI, USB ................................................................B-14
ICH8-M 3/4 ..................................................................................B-15
ICH8-M 4/4 ..................................................................................B-16
CLOCK GENERATOR ................................................................B-17
3G POWER, TPM ........................................................................B-18
IEEE 1394 VT6311S ....................................................................B-19
MULTI 1/O, ODD, CCD, BT .......................................................B-20
NEW CARD, MINI PCIE, USB ...................................................B-21
LED, FAN, PC BEEP, TP, FP ......................................................B-22
Preface
IX
Preface
ENE MR510, 7 IN 1 ..................................................................... B-23
PCI-E LAN RTL8111B ...............................................................B-24
AUDIO CODEC ALC883 ...........................................................B-25
AUDIO AMP2056 .......................................................................B-26
KBC-ITE IT8512E ....................................................................... B-27
3VS, 5VS ..................................................................................... B-28
POWER GPU/1.25VS .................................................................. B-29
POWER 3.3V/5V .........................................................................B-30
POWER 1.5VS/ 1.05VS ...............................................................B-31
POWER 1.8V/0.9V ......................................................................B-32
AC IN, CHARGE ......................................................................... B-33
VCORE FOR MEROM CPU ....................................................... B-34
MULTI BOARD, LID, LED, SW, USB ......................................B-35
MULTI BOARD 3G, MDC, RJ11 ...............................................B-36
FINGERPRINT BOARD ............................................................. B-37
CLICK BOARD ........................................................................... B-38
Preface
X
Chapter 1: Introduction
Overview
This manual covers the information you need to service or upgrade the M72XR series notebook computer. Information
about operating the computer (e.g. getting started, and the Setup utility) is in the User’s Manual. Information about drivers (e.g. VGA & audio) is also found in User’s Manual. That manual is shipped with the computer.
Operating systems (e.g. Windows XP, Windows Vista, etc.) have their own manuals as do application software (e.g. word
processing and database programs). If you have questions about those programs, you should consult those manuals.
Introduction
The M72XR series notebook is designed to be upgradeable. See “Disassembly” on page 2 - 1 for a detailed description
of the upgrade procedures for each specific component. Please note the warning and safety information indicated by the
“” symbol.
The balance of this chapter reviews the computer’s technical specifications and features.
1.Introduction
Overview 1 - 1
Introduction
System Specifications
Latest Specification Information
The specifications listed in this Appendix are correct at the time of going to press. Certain items (particularly processor types/speeds and
CD/DVD device types) may be changed, delayed or updated due to the manufacturer's release schedule. Check with your service center
for details.
Feature Specification
1.Introduction
Processor Intel® Core™2 Duo Processor
(478-pin) Micro-FC-PGA Package - Socket-P
T7100
Intel® Core™2 Duo Processor
(478-pin) Micro-FC-PGA Package - Socket-P
T7300/ T7500/ T7700
Core Logic Intel GM965+ICH8M Chipset
LCD 12.1" WXGA (1280 * 800) Glare / Non Glare TFT LCD
Memory Dual Channel 64-bit Wide DDRII (DDR2)
Two 200 Pin SO-DIMM Sockets Supporting DDRII (DDR2) 533MHz - 512MB RAM Modules OR 667MHz - 512MB/
1024MB RAM Modules
Memory Expandable up to 2GB (512/1024 MB DDRII Modules)
Video Adapter Intel GM965 Integrated Video
High Preference 3D/2D Graphic Accelerator
Supports Dynamic Video Memory Technology DVMT (up to 256MB dynamically allocated from system memory where
needed)
Supports DirectX 9 3D Graphics Engine Accelerator
Security Security (Kensington® Type) Lock Slot
Fingerprint ID Reader Module (Factory Option)
65nm (65 Nanometer) Process Technology
2MB On-die L2 Cache & 800MHz FSB
1.8 GHz
65nm (65 Nanometer) Process Technology
4MB On-die L2 Cache & 800MHz FSB
2.0/ 2.2/ 2.4 GHz
BIOS Password
Trusted Platform Module V1.2 (Factory Option)
1 - 2 System Specifications
Feature Specification
BIOS One 8Mb SPI Flash ROM Phoenix™ BIOS
Storage One Changeable 12.7mm(h) Optical Device (CD/DVD) Type Drive (see “Optional” on page 1 - 4) Easy Changeable 2.5"
9.5 mm (h) SATA (Serial) HDD
Introduction
Audio High Definition Audio (HDA)
Compliant with Microsoft UAA (Universal Audio
Architecture)
Direct Sound 3D™ Compatible
EAX™ 1.0 & 2.0 Compatible
Keyboard &
Pointing Device
Interface Three USB 2.0 Ports
Card Reader Embedded 7-in-1 Card Reader (MS/ MS Pro/ SD/ Mini SD/ MMC/ RS MMC/ MS Duo) Note: MS Duo/ Mini SD/ RS
ExpressCard Slot One ExpressCard/34(54) Slot
Communication
*Note: The 3.5G
and Intel Turbo
Memory Modules
cannot coexist. If one
of these factory options is included in
your purchase option, then the other is
unavailable.
Winkey Keyboard Built-In TouchPad with Scrolling Function
One Headphone-Out Jack
One Microphone-In Jack
One S/PDIF Out Jack
One Internal Microphone
MMC Cards require a PC adapter
Wireless Module Options:
Intel PRO/Wireless 3945ABG PCIe Wireless LAN Module
Intel Wireless WiFi Link 4965AGN PCIe Wireless LAN Module
802.11 b/g USB Wireless LAN Module
10M/100/1000Mb Base-T Ethernet LAN
56K MDC Modem V.90 & V.92 Compliant
1.3M or 2.0M Pixel USB PC Camera Module (Factory Option)
Bluetooth 2.0 + EDR (Enhanced Data Rate) Module (Factory Option)
UMTS/HSPDA-based 3.5G Module with Mini Card Interface (Factory Option)
Quad-band GSM/GPRS (850 MHz, 900 MHz, 1800 MHz, 1900 MHz)
UMTS WCDMA FDD (2100 MHz)
A3D™ Compatible
S/PDIF Digital Output
2 * Built-In Speake rs
Built-In Microphone
One RJ-11 Modem Jack
One RJ-45 LAN Jack
One DC-In Jack
One External Monitor Port
One IEEE1394 Port
UMTS Modes
Note that UMTS modes
CAN NOT be used in North
America.
1.Introduction
System Specifications 1 - 3
Introduction
Feature Specification
1.Introduction
Power
Management
Power Full Range AC/DC Adapter AC input 100 - 240V, 50 - 60Hz, DC Output 19V, 3.42A or 18.5V, 3.5A (65 Watts)
Battery 4 Cell Smart Lithium-Ion Battery Pack, 14.8V/2.4AH
Environmental
Spec
Dimensions
& Weight
Optional
*Note: The 3.5G
and Intel Turbo
Memory Modules
cannot coexist. If one
of these factory options is included in
your purchase option, then the other is
unavailable.
Supports ACPI 3.0 Supports Wake on LAN
Supports Wake on USB
Supports Resume from Modem Ring
8 Cell Smart Lithium-Ion Battery Pack, 14.8V/4.4AH (Option)
RTC Battery
Temperature
Operating: 5
Non-Operating: -20°C ~ 60°C
299mm (w) * 219mm (d) * 26.5-35.7mm (h) 1.88 kg With 4 Cell Battery and ODD
Optical Drive Module Options:
DVD/CD-RW Combo Drive Module
DVD Dual Drive Module
Super Multi Drive Module
Wireless Module Options:
Intel PRO/Wireless 3945ABG PCIe Wireless LAN Module
Intel Wireless WiFi Link 4965AGN PCIe Wireless LAN
Module
802.11 b/g USB Wireless LAN Module
USB Floppy Disk Drive
8 Cell Smart Lithium-Ion Battery Pack
Trusted Platform Module V1. 2 (Factory Option)
1.3M or 2.0M Pixel USB PC Camera Module (Factory
Option)
Fingerprint ID Reader Module (Factory Option)
Bluetooth 2.0 + EDR (Enhanced Data Rate) Module (Factory
Option)
°C ~ 35°C
Relative Humidity
Operating: 20% ~ 80%
Non-Operating: 10% ~ 90%
*Intel Turbo Memory (Robson) NAND Flash Memory Card
Module (Factory Option)
OR
*UMTS/HSPDA-based 3.5G Module with Mini Card Interfa ce
(Factory Option)
Quad-band GSM/GPRS (850 MHz, 900 MHz, 1800 MHz,
1900 MHz)
UMTS WCDMA FDD (2100 MHz)
UMTS Modes
Note that UMTS modes CAN NOT be used in
North America.
1 - 4 System Specifications
Model Differences
The models vary slightly in external cover design and color.
Introduction
Figure 1
Model Differences
1.Introduction
System Specifications 1 - 5
Introduction
Figure 2
Top View
1. Built-In PC
Camera
(Optional)
2. LCD
3. Speakers
4. Power Button
5. Hot-Key Buttons
6. LED Status
Indicators
7. Keyboard
8. Touchpad &
Buttons
9. LED Power &
Communication
Indicators
10.Fingerprint
1.Introduction
Module (Optional)
11. Built-In
Microphone
External Locator - Top View with LCD Panel Open
1
2
3
6
7
3
5
4
9
1 - 6 External Locator - Top View with LCD Panel Open
8
10
11
6
5
4
Introduction
External Locator - Front & Rear Views
1
2
3
4
5
Front
6
Figure 3
Front View
1. LCD Latches
2. LED Power &
Communication
1
Indicators
3. 7-in-1 Card Reader
4. S/PDIF-Out Jack
5. Microphone-In Jack
6. Headphone-Out
Jack
1.Introduction
Figure 4
Rear View
1. Battery
Rear
1
External Locator - Front & Rear Views 1 - 7
Introduction
Figure 5
Left Side View
1. DC-In Jack
2. RJ-45 LAN Jack
3. External Monitor
Port
4. Mini-IEEE 1394
Port
5. Vent
6. 3 * USB 2.0 Ports
7. ExpressCard/
54(34) Slot
External Locator - Left & Right Side Views
2
1
3
4
Left
5
7
6
6
1.Introduction
Figure 6
Right Side View
1. Optical Device
Drive Bay
2. Emergency Eject
Hole
3. USB 2.0 Port
4. RJ-11 Phone Jack
5. Security Lock Slot
1 - 8 External Locator - Left & Right Side Views
1
2
Right
3
4
5
External Locator - Bottom View
Introduction
Figure 7
Bottom View
1
2
3
1. Battery
2. Hard Disk Bay
Cover
(3.5G Module/Intel
Turbo Memory
Module Location)
3. RAM & CPU Bay
Cover
1.Introduction
Overheating
To prevent your computer from overheating
make sure nothing
blocks the vent/fan intakes while the computer is in use.
External Locator - Bottom View 1 - 9
Introduction
Figure 8
Mainboard Top
Key Parts
1. SC452
2. ITE 8512E
3. ExpressCard
Assembly
1.Introduction
Mainboard Overview - Top (Key Parts)
3
1 - 10 Mainboard Overview - Top (Key Parts)
1
2
Introduction
Mainboard Overview - Bottom (Key Parts)
2
1
3
4
Figure 9
Mainboard Bottom
Key Parts
1. CPU Socket (no
CPU installed)
2. PCI-E LAN
RTL811 1B
3. CLOCK
GENERATOR
ICS9LPR363
4. Northbridge-Intel
GM965
5. Card Reader
5
6
7
Controller ENE
MR510
6. VIA VT6311S
7. SouthbridgeICH8-M
8. Memory Slots
DDRII So-DIMM
1.Introduction
8
Mainboard Overview - Bottom (Key Parts) 1 - 11
Introduction
Figure 10
Mainboard Top
Connectors
1. External Monitor
Port
2. RJ-45 LAN Jack
3. CCD Cable
Connector
4. LCD Cable
Connector
5. Speaker Cable
Connector
6. Touch Pad Cable
Connector
7. Fingerprint Cable
Connector
8. Internal
Microphone Cable
1.Introduction
Connector
9. Keyboard Cable
Connector
Mainboard Overview - Top (Connectors)
6
1
2
3
5
4
1 - 12 Mainboard Overview - Top (Connectors)
7
8 9
Introduction
Mainboard Overview - Bottom (Connectors)
1
2
12
3
4
13
10
5
14
Figure 11
Mainboard Bottom
Connectors
5
1. DC-In Jack
2. RJ-45 LAN Jack
3. External Monitor
Port
4. Inverter Cable
15
6
7
8
Connector
5. USB Port
6. S/PDIF-Out Jack
7. Microphone-In
Jack
8. Headphone-Out
Jack
9. Optical Device
Drive Connector
10.Mini PCIe Socket
11. SATA HDD
Connector
12.Battery
Connector
13.Bluetooth Cable
Connector
14.Fan Cable
Connector
15.Card Reader
1.Introduction
11
9
Mainboard Overview - Bottom (Connectors) 1 - 13
Introduction
1.Introduction
1-14
Chapter 2: Disassembly
Overview
This chapter provides step-by-step instructions for disassembling the M72XR series notebook’s parts and subsystems.
When it comes to reassembly, reverse the procedures (unless otherwise indicated).
We suggest you completely review any procedure before you take the computer apart.
Disassembly
Procedures such as upgrading/replacing the RAM, CD device and hard disk are included in the User’s Manual but are
repeated here for your convenience.
To make the disassembly process easier each section may have a box in the page margin. Information contained under
the figure # will give a synopsis of the sequence of procedures involved in the disassembly procedure. A box with a
lists the relevant parts you will have after the disassembly process is complete. Note: The parts listed will be for the disassembly procedure listed ONLY, and not any previous disassembly step(s) required. Refer to the part list for the previous disassembly procedure. The amount of screws you should be left with will be listed here also.
A box with a will also provide any possible helpful information. A box with a contains warnings.
An example of these types of boxes are shown in the sidebar.
2.Disassembly
Information
Warning
Overview 2 - 1
Disassembly
2.Disassembly
NOTE: All disassembly procedures assume that the system is turned OFF, and disconnected from any power supply (the
battery is removed too).
Maintenance Tools
The following tools are recommended when working on the notebook PC:
• M3 Philips-head screwdriver
• M2.5 Philips-head screwdriver (magnetized)
• M2 Philips-head screwdriver
• Small flat-head screwdriver
• Pair of needle-nose pliers
• Anti-static wrist-strap
Connections
Connections within the computer are one of four types:
Locking collar sockets for ribbon connectors To release these connectors, use a small flat-head screwdriver to
gently pry the locking collar away from its base. When replacing the connection, make sure the connector is oriented in the
same way. The pin1 side is usually not indicated.
2 - 2 Overview
Pressure sockets for multi-wire connectors To release this connector type, grasp it at its head and gently
rock it from side to side as you pull it out. Do not pull on the
wires themselves. When replacing the connection, do not try to
force it. The socket only fits one way.
Pressure sockets for ribbon connectors To release these connectors, use a small pair of needle-nose pli-
ers to gently lift the connector away from its socket. When replacing the connection, make sure the connector is oriented in
the same way. The pin1 side is usually not indicated.
Board-to-board or multi-pin sockets To separate the boards, gently rock them from side to side as
you pull them apart. If the connection is very tight, use a small
flat-head screwdriver - use just enough force to start.
Maintenance Precautions
The following precautions are a reminder. To avoid personal injury or damage to the computer while performing a removal and/or replacement job, take the following precautions:
1. Don't drop it. Perform your repairs and/or upgrades on a stable surface. If the computer falls, the case and other
components could be damaged.
2. Don't overheat it. Note the proximity of any heating elements. Keep the computer out of direct sunlight.
3. Avoid interference. Note the proximity of any high capacity transformers, electric motors, and other strong mag-
netic fields. These can hinder proper performance and damage components and/or data. You should also monitor
the position of magnetized tools (i.e. screwdrivers).
4. Keep it dry. This is an electrical appliance. If water or any other liquid gets into it, the computer could be badly
damaged.
5. Be careful with power. Avoid accidental shocks, discharges or explosions.
•Before removing or servicing any part from the computer, turn the computer off and detach any power supplies.
•When you want to unplug the power cord or any cable/wire, be sure to disconnect it by the plug head. Do not pu ll on the wir e.
6. Peripherals – Turn off and detach any peripherals.
7. Beware of static discharge. ICs, such as the CPU and main support chips, are vulnerable to static electricity.
Before handling any part in the computer, discharge any static electricity inside the computer. When handling a
printed circuit board, do not use gloves or other materials which allow static electricity buildup. We suggest that
you use an anti-static wrist strap instead.
8. Beware of corrosion. As you perform your job, avoid touching any connector leads. Even the cleanest hands produce oils which can attract corrosive elements.
9. Keep your work environment clean. Tobacco smoke, dust or other air-born particulate matter is often attracted
to charged surfaces, reducing performance.
10. Keep track of the components. When removing or replacing any part, be careful not to leave small part s, such as
screws, loose inside the computer.
Disassembly
Power Safety
Warning
Before you undertake
any upgrade procedures, make sure that
you have turned off the
power, and disconnected all peripherals
and cables (including
telephone lines). It is
advisable to also remove your battery in
order to prevent accidentally turning the
machine on.
2.Disassembly
Cleaning
Do not apply cleaner directly to the computer, use a soft clean cloth.
Do not use volatile (petroleum distillates) or abrasive cleaners on any part of the computer.
Overview 2 - 3
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