Clevo d900t Service Manual
Notebook Computer
D900T
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
December 2004
Trademarks
Intel® and Pentium® are US registered trademarks of Intel Corporation.
is a trademark of SRS Labs, Inc.
WOW technology is incorporated under license from SRS Labs, Inc.
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 D900T 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
Preface
Preface
III
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 this equipment with a telephone line (other than a cordless type) during an electrical storm. 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 20V, 9A minimum).
CAUTION
Always disconnect all telephone lines from the wall outlet before servicing or disassembling this equipment.
Preface
IV
TO REDUCE THE RISK OF FIRE, USE ONLY NO. 26 AWG OR LARGER,
TELECOMMUNICATION LINE CORD
This computer’s optical device is a Class I Laser 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 computer 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 other strong
magnetic 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 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.
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.
• 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.
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.
Preface
Preface
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
Specifications ..................................................................................1-2
External Locator - Top View with LCD Panel Open .....................1-5
External Locator - Front & Rear Views ..........................................1-6
External Locator - Right & Left Side 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
Cleaning ..........................................................................................2-3
Disassembly Steps ...........................................................................2-4
Removing the Battery ......................................................................2-5
Removing the Hard Disk Drive .......................................................2-6
Removing the System Memory (RAM) ..........................................2-8
Removing the Optical Device .......................................................2-10
Removing the Processor ................................................................2-11
Removing the PCI Express Video Card ........................................2-13
Removing the Keyboard & Shielding Plate ..................................2-14
Removing the Modem Module .....................................................2-15
Removing the Wireless LAN/WLAN & Bluetooth Combo Module 216
Removing the TV Tuner ...............................................................2-17
Removing the Camera Module .................................................... 2-18
Part Lists ..................................................A-1
Part List Illustration Location ........................................................ A-2
Top (D900T) .................................................................................. A-3
Bottom (D900T) ............................................................................ A-4
LCD (D900T) ................................................................................ A-5
Toshiba DVD-ROM Drive (D900T) ............................................. A-6
QSI Combo Drive (D900T) ........................................................... A-7
DVD Dual Drive (D900T) ............................................................. A-8
Hard Disk Drive (D900T) .............................................................. A-9
Schematic Diagrams.................................B-1
Preface
System Block Diagram ...................................................................B-2
Clock Generator ..............................................................................B-3
CPU-1 Host/Power .........................................................................B-4
CPU-2 GTL+ / GND ......................................................................B-5
GMCH-1 Host/ PCI-E/ DMI ..........................................................B-6
GMCH-2 DDR2 ..............................................................................B-7
GMCH-3 PWR / GND ....................................................................B-8
DDR2 DIMM-A .............................................................................B-9
DDR2 DIMM-B ............................................................................B-10
DDR2 Terminator .........................................................................B-11
ICH6-1 ..........................................................................................B-12
ICH6-2 PWR / GND .....................................................................B-13
VGA Daughter Connector ............................................................B-14
DVI / TV-Out / Video-In Con ......................................................B-15
Panel Con / LED Indicator ...........................................................B-16
PCMCIA TI1410 ..........................................................................B-17
PCMCIA Power / Fan Con ...........................................................B-18
PCI 1394a TI TSB43AB22 ...........................................................B-19
IX
Preface
GLAN RTL110SBL ..................................................................... B-20
SATA RAID PDC20378 .............................................................. B-21
LPC Super I/O NS87393 ..............................................................B-22
LPT / COM Port CON / Thermistor .............................................B-23
LPC H8 ......................................................................................... B-24
CODEC ALC880 ......................................................................... B-25
Audio Jack & ADJ Power ............................................................B-26
Audio DJ BBVL+ Controller .......................................................B-27
USB / CR / CCD Con / SRS ........................................................B-28
Mini-PCI / NC / MDC / BT Con ..................................................B-29
VCORE ........................................................................................ B-30
DDR Power ..................................................................................B-31
System Power ............................................................................... B-32
Charger ......................................................................................... B-33
Audio Board .................................................................................B-34
Audio DJ Board ............................................................................ B-35
Preface
CD-ROM Board ...........................................................................B-36
Click Board ..................................................................................B-37
Switch Board ................................................................................B-38
X
1: Introduction
Overview
This manual covers the information you need to service or upgrade the D900T 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 2000, Windows XP, UNIX, 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 D900T 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
Specifications
Feature Specification
Processor Types Intel® Pentium® 4 520/ 530/ 540/ 550/ 560 Processor with HT Technology
LGA775 Package (775-pin)
(90nm) 90 Nanometer Process Technology, 1024KB On-Die L2 Cache & 800MHz Front Side Bus - 2.8/ 3.0/ 3.2/
3.4/ 3.6 GHz
Core Logic Intel 915P + ICH6
Security Security (Kensington® Type) Lock Slot BIOS Password
Memory Two 64-bit wide DDR-II (DDR2) Data Channels
Four 200 Pin DDR SODIMM Sockets
Expandable up to 4GB (Compatible with 1024MB, 512MB, 256MB DDR-II (DDR2) - 400/ 533 Modules)
Memory Available
1.Introduction
Even if you have 4GB of RAM in the computer, the POST (at Startup) or System
(Windows) Control Panel, will show 2814GB of RAM available to the system. This
is due to 1GB of RAM being reserved for the PCI space, and further RAM is reserved for the BIOS.
BIOS One 512KB Flash ROM Phoenix BIOS
LCD 17" WXGA (1440 * 900) / WSXGA+ (1680 * 1050) TFT LCD
Display NVIDIA NV41M High Performance Chip
256MB DDR-II (DDR2) Video RAM On Board
128-bit Graphics Engine
PCI Express * 16
Fully DirectX® 9 Support
Modular Design
1 - 2 Specifications
Feature Specification
Storage Options One External USB 1.44Mb Floppy Disk Drive
One Changeable Primary 2.5" 9.5mm (h) Hard Disk Drive
One Changeable Secondary 2.5" 9.5mm (h) Hard Disk Drive RAID (Option)
Supports Serial ATA HDD
RAID 0, RAID 1, HDD Fault Tolerance System (Optional)
One Changeable Primary Optical Device Bay - 12.7 mm (h) for Optical CD/DVD Device Drive Options
(see“Optional” on page 1 - 4)
One Changeable Secondary Optical Device Bay - 12.7 mm (h) for Optical CD/DVD Device Drive Options
(see“Optional” on page 1 - 4)
Introduction
Audio SRS WOW Surround Sound Technology
inside
Inter Azalia Compliant Interface
3D Stereo Enhanced Sound System
Virtual 8-Channel Sound System
Compatible with Sound-Blaster PRO™
Keyboard & Pointing
Device
PCMCIA One Type II PCMCIA 3.3V/5V Socket
I/O Ports Four USB 2.0/1.1 Ports
Full Size Winkey Keyboard with Numeric Keypad Built-In Touch P ad (Scroll Functionality Included)
Two Mini-IEEE1394a Ports
One S-Video-Out Jack for TV & HDTV Output
One Serial Port
One Parallel Port (LPT1) Supporting ECP/EPP
One Infrared Transceiver (IrDA 1.1/FIR/SIR/ASKIR)
One DVI-Out Port
One PS/2 Port (Mouse/Keyboard)
One Headphone-Out Jack
One Microphone-In Jack
S/PDIF Digital Output (5.1 CH)
Built-In Microphone
4 * Built-In Speakers
Built-In Sub Woofer
Built-In Audio DJ Console for Music CD (MP3 Format
Compatible)
One S/PDIF Out Jack
One RJ-11 Jack (Modem)
One RJ-45 Jack (Local Area Network)
One DC-In Jack
One Line-In Jack for Audio Input
One CATV-In Jack (Functions with Optional TV Tuner
Module)
One S-Video-In Jack for Video Input (Functions with
Optional TV Tuner Module)
1.Introduction
Specifications 1 - 3
Introduction
Feature Specification
1.Introduction
Communication Infrared Transceiver
Infrared Transfer 1cm ~ 1M Operating
Distance
115.2K bps SIR
4M bps FIR
IrDA 1.1 Compliant
10/100/1000 BASE-TX Fast Ethernet LAN on board
Integrated V.90/56K Azalia Modem (V.92 Compliant)
Card Reader Embedded 7-in-1 Card Reader (MS/ MS Pro/ SD/ MMC/ CF/ Micro Drive/ SM)
Power Management Supports ACPI 2.0
Supports Hibernate/Standby Modes
Supports Battery Low Sleep
Power Full Range AC Adapter - AC-In 100~240V, 47~63Hz, DC Output 20V, 9A
Easy Changeable 12-Cell Smart Lithium-Ion 6600mAH Main Battery
Environmental Spec Temperature
Operating: 5
Non-Operating: -20°C ~ 60°C
Physical
Dimensions &
Weight
Optional Software DVD Player
397mm (w) * 298mm (d) * 49.5mm (h) 5.80+3% kg with Battery
°C ~ 35°C
802.11b/g Mini-PCI Wireless LAN Module (Optional)
Bluetooth™ Class II V1.2 & 802.11b/g Wireless LAN
Mini-PCI interface Combo Module (Optional)
300K Pixel Video Camera Module (Optional)
Supports Resume from Alarm
Supports Resume from Modem Ring
Relative Humidity
Operating: 20% ~ 80%
Non-Operating: 10% ~ 90%
Mini-PCI TV Tuner Module
1 - 4 Specifications
CD-ROM Drive Module
DVD-ROM Drive Module
DVD/CD-RW Combo Drive Module
DVD-Dual Drive Module
Mini-PCI 802.11 b/g Wireless LAN Module
Mini-PCI 802.11b/g Wireless LAN + Bluetooth Combo
Module
300K Pixel USB 2.0 Video Camera Module
External Locator - Top View with LCD Panel Open
1
2
6
10
3
7
8
9
6
5
4 4
Introduction
Figure 1 - 1
Top View with LCD
Panel Open
1. Optional Built-In PC
Camera
2. LCD
3. LED Power &
Communication
Indicators
4. Speakers
5. LED Status
Indicators
6. Built-In Microphone
7. Hot-Key Buttons
8. Power Button
9. Lid Sensor Location
(not visible
7
8
externally)
10. Keyboard
11. TouchPad and
Buttons
1.Introduction
11
External Locator - Top View with LCD Panel Open 1 - 5
Introduction
1.Introduction
Figure 1 - 2
Front & Rear Views
1. LCD Latches
2. Audio DJ Player
Controls
3. Consumer Infrared
Transceiver
4. Speakers
5. Vent/Fan Intake
6. DC-In Jack
7. Serial Port
8. Parallel Port
9. DVI-Out Port
10. PS2 Port
11. RJ-11 Phone Jack
12. RJ-45 LAN Jack
13. CATV Jack
14. S-Video-In Jack*
*
*
*Enabled with Optional
Mini-PCI TV Tuner Only
External Locator - Front & Rear Views
1
4
5
3
2
5
6 7 8
1
2
9
4
13 14
10 11 12
1 - 6 External Locator - Front & Rear Views
External Locator - Right & Left Side Views
Introduction
Figure 1 - 3
Right & Left Side
Views
9
2
1
3 3 4 5 6 7
8
12
10
13
11
1. S-Video-Out Jack
2. 4 * USB 2.0 Ports
3. 2 * Mini-IEEE 1394a
Port
4. Line-In Jack
5. S/PDIF-Out Jack
6. Microphone-In Jack
7. Headphone-Out
Jack
8. 7-in-1 Card Reader
9. PC Card Slot
10. Infrared Transceiver
11. Primary Optical
Device Drive Bay
(for CD/DVD
Device)
12. Secondary Optical
Device Drive Bay
(for CD/DVD
Device)
13. Security Lock Slot
1.Introduction
External Locator - Right & Left Side Views 1 - 7
Introduction
Figure 1 - 4
Bottom View
1. Battery
2. Vent/Fan Intake
3. Memory (RAM)
Cover
4. Hard Disk Cover
5. Sub Woofer
6. CPU Cover
7. Video Card Cover
External Locator - Bottom View
6
2
2
1
3
2
1.Introduction
5
7
4
2
1 - 8 External Locator - Bottom View
Introduction
Mainboard Overview - Top (Key Parts)
9
7
8
6
Figure 1 - 5
Mainboard Top
Key Parts
1. PC Card
Assembly
4
3
2
2. SATA RAID
Controller
PDC20378
3. ICH6 I/O
Controller Hub
4. Audio DJ BBVL
Controller
5. SRS WOW
Controller
6. Clock Generator
7. Grantsdale
GMCH
8. Mini-PCI Slots
9. CMOS Battery
1.Introduction
1
5
Mainboard Overview - Top (Key Parts) 1 - 9
Introduction
1.Introduction
Figure 1 - 6
Mainboard Bottom
Key Parts
1. LGA775 CPU
Socket (no CPU
installed)
2. Memory Slots (no
memory installed)
3. Card Bus
PCI-1410
4. LPC H8
5. Audio Codec
6. NS87393 LPC SIO
7. 1394a
TSB43AB22
8. GigaLAN
RTL8110SBL
Mainboard Overview - Bottom (Key Parts)
5
5
8
7
6
7
4
3
1
1 - 10 Mainboard Overview - Bottom (Key Parts)
2
2
Introduction
Mainboard Overview - Top (Connectors)
10
11
12
13
14
15
19
16
89
7
6
Figure 1 - 7
Mainboard Top
Connectors
5
4
3
2
1
1. Speaker (JSPK5)
2. Card
Reader(JCR1)
3. Audio DJ (J3)
4. Speaker (JSPK4)
5. Speaker (JSPK3)
6. Keyboard
(JINTKB1)
7. Touchpad (JTP1)
8. Speaker (JSPK2)
9. Fan (JFAN2)
10.Fan (JFAN1)
11. Swiitchboard &
Hot Keys(JSW1)
12.LED (JLED1)
13.LCD & Inverter
(JLCD1)
14.PC Camera
(JCCD1)
15.Modem Cable
(CN1)
16.Speaker (JSPK1)
17.IEEE1394
(J1394AB1)
18.Audio Board
(JAUDIO1)
19.Modem (JMDC1)
1.Introduction
17
18
Mainboard Overview - Top (Connectors) 1 - 11
Introduction
1.Introduction
Figure 1 - 8
Mainboard Bottom
Connectors
1. Optical Devices
(JCD1)
2. Hard Disk
(JHDD2)
3. PCI Express VGA
(CON2)
4. PCI Express VGA
(CON1)
5. PCI Express VGA
Heat Sink Fan
(JFAN4)
6. Memory Fan
(JFAN3)
7. CPU Heat Sink
(JRT)
Mainboard Overview - Bottom (Connectors)
4
5
6
3
2
1 - 12 Mainboard Overview - Bottom (Connectors)
7
1
2: Disassembly
Overview
This chapter provides step-by-step instructions for disassembling the D900T 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 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
• Vacuum Handling Tool (for CPU removal)
• 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 pliers 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 pull on the wire.
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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