Clevo L285P User manual

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LCD Computer
L285P
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
October 2002
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 computer.
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

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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 computer’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 computer.

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Contents
Introduction ........................................................... 1-1
Overview ............................................................................................................. 1-1
System Specifications ......................................................................................... 1-2
Processor ............................................................................................................. 1-2
Core Logic Chip .................................................................................................. 1-2
BIOS .................................................................................................................... 1-2
System Memory .................................................................................................. 1-2
Video ................................................................................................................... 1-3
LCD ..................................................................................................................... 1-3
Audio ................................................................................................................... 1-3
Interface ............................................................................................................... 1-3
PC Card Sockets .................................................................................................. 1-3
Storage ................................................................................................................. 1-4
Modem ................................................................................................................. 1-4
LAN ..................................................................................................................... 1-4
Keyboard ............................................................................................................. 1-4
Power ................................................................................................................... 1-4
Power Management ............................................................................................. 1-4
Support for WFM Ver 2.0 ................................................................................... 1-4
Indicators ............................................................................................................. 1-4
Physical Dimensions ........................................................................................... 1-4
Weight ................................................................................................................. 1-5
Fan Bearing Type: ............................................................................................... 1-5
Security ................................................................................................................ 1-5
Optional ............................................................................................................... 1-5
External Locator - Front View ............................................................................ 1-6
External Location - Left & Right Side Views ..................................................... 1-7
External Locator - Rear View ............................................................................. 1-8
Mainboard Overview - Top ................................................................................. 1-9

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Key Parts ............................................................................................................ 1-9
Mainboard Overview - Bottom ......................................................................... 1-10
Key Parts ........................................................................................................... 1-10
Mainboard Overview - Top ............................................................................... 1-11
Cable Connectors and Switches ........................................................................ 1-11
Mainboard Overview - Bottom ......................................................................... 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 Hard Disk Drive Assembly .......................................................... 2-6
Removing the System Memory ........................................................................... 2-7
Removing the CPU ............................................................................................. 2-9
Removing the I/O Bracket ................................................................................ 2-11
Removing the Modem ....................................................................................... 2-12
Removing the Floppy Disk Drive Assembly .................................................... 2-13
Removing the CD Device Drive Assembly ...................................................... 2-14
Removing the Inverter Board ............................................................................ 2-15
Removing the Mainboard .................................................................................. 2-16
Separating the Base Assembly from the LCD & Mainboard Assembly ........... 2-17
Removing the LCD ........................................................................................... 2-18
Removing the LED Board ................................................................................. 2-19
Removing the Speaker Units ............................................................................. 2-19
Removing the Base Assembly Cover ................................................................ 2-20
Removing the USB Board ................................................................................. 2-21
Removing the Power Supply Unit ..................................................................... 2-21
Part Lists ............................................................... A-1

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Part List Illustration Location .............................................................................A-2
Base-1 (L285P) ...................................................................................................A-3
Back (L285P) ......................................................................................................A-4
LCD Front (L285P) .............................................................................................A-5
Floppy Disk Drive (L285P) ................................................................................A-6
Hard Disk Drive (L285P) ....................................................................................A-7
MKE-TEAC CD-ROM Drive (L285P) ..............................................................A-8
SAMSUNG CD-ROM Drive (L285P) ................................................................A-9
SAMSUNG DVD-ROM Drive (L285P) ..........................................................A-10
TOSHIBA DVD-ROM Drive (L285P) .............................................................A-11
KME Combo Drive (L285P) ............................................................................A-12
SAMSUNG-TOSHIBA Combo Drive (L285P) ...............................................A-13
KME CD-RW Drive (L285P) ...........................................................................A-14
Schematic Diagrams ..............................................B-1
System Block Diagram .......................................................................................B-3
Northwood Power & Ground - 1 of 2 .................................................................B-4
Northwood Memory Interface - 2 of 2 ................................................................B-5
Clock Generator ..................................................................................................B-6
MCH845 Power & Ground - 1 of 4 ....................................................................B-7
MCH845 Host Interface - 2 of 4 .........................................................................B-8
MCH845 Memory Interface - 3 of 4 ...................................................................B-9
MCH845 AGP Interface - 4 of 4 .......................................................................B-10
DDR RIMM ......................................................................................................B-11
ATI Power .........................................................................................................B-12
ATI Host Interface ............................................................................................B-13
ATI Memory - 1 of 2 .........................................................................................B-14
ATI Memory - 2 of 2 .........................................................................................B-15
DDR VRAM - 1 of 2 .........................................................................................B-16
DDR VRAM - 2 of 2 .........................................................................................B-17
LCD Connector .................................................................................................B-18
CRT & USB ......................................................................................................B-19

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ICH2 (Power, LPC, Clock, SMbus) - 1 of 2 .....................................................B-20
ICH2 (PCI, IDE, Hub, USB, LAN) - 2 of 2 ......................................................B-21
CardBus (TI PCI1420) ......................................................................................B-22
CardBus Slot & Mini PCI .................................................................................B-23
LAN 8193C .......................................................................................................B-24
IDE Connector & Firmware HUB ....................................................................B-25
Super I/O W83627HF .......................................................................................B-26
Serial & Parallel Port, MDC .............................................................................B-27
AC'97 Codec .....................................................................................................B-28
Amplifier & Inverter Con. .................................................................................B-29
Power - 1 of 3 ....................................................................................................B-30
Power - 2 of 3 ....................................................................................................B-31
Power - 3 of 3 ....................................................................................................B-32
Indicator Board ..................................................................................................B-33
LCD Transfer Board - Hyundai ........................................................................B-34
LCD Transfer Board - Hyundai ........................................................................B-35
LCD Transfer Board - Sharp .............................................................................B-36
LCD Transfer Board - Sharp .............................................................................B-37
LCD Transfer Board - Chi Mei .........................................................................B-38
LCD Transfer Board - Chi Mei .........................................................................B-39
LCD Transfer Board - AU ................................................................................B-40
LCD Transfer Board - AU ................................................................................B-41
PCB Inverter Board - 1 of 2 .............................................................................B-42
PCB Inverter Board - 2 of 2 .............................................................................B-43
PCB Inverter Board ...........................................................................................B-44
Updating the FLASH ROM BIOS....................... C-1

Introduction
Overview 1 - 1
1.Introduction
1: Introduction
Overview
This manual covers the information you need to service or upgrade the L285P LCD computer. Information about oper-
ating 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. DOS, Windows 9x, Windows NT 4.0, Windows 2000, Windows XP, OS/2 Warp, 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.
The L285P LCD computer 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.