Clevo L295T User manual

Preface
I
Preface
LCD Computer
L295T Series
Service Manual

Preface
II
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 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
November 2005
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.

Preface
III
Preface
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

Preface
IV
Preface
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.

Preface
V
Preface
Contents
Introduction ..............................................1-1
Overview .........................................................................................1-1
System Specifications .....................................................................1-2
External Locator - Front View ........................................................1-5
External Location - Left & Right Side Views .................................1-6
External Locator - Rear View .........................................................1-7
Mainboard Overview - Top .............................................................1-8
Key Parts ........................................................................................1-8
Mainboard Overview - Bottom .......................................................1-9
Key Parts .........................................................................................1-9
Mainboard Overview - Top ...........................................................1-10
Cable Connectors and Switches ....................................................1-10
Mainboard Overview - Bottom .....................................................1-11
Cable Connectors and Switches ....................................................1-11
Disassembly ...............................................2-1
Overview .........................................................................................2-1
Maintenance Tools ..........................................................................2-2
Connections .....................................................................................2-2
Maintenance Precautions .................................................................2-3
Disassembly Steps ...........................................................................2-4
Removing the Hard Disk Drive Assembly ......................................2-5
Removing the LCD Back Cover .....................................................2-6
Removing the System Memory .......................................................2-7
Removing the CPU ..........................................................................2-8
Removing the I/O Bracket .............................................................2-10
Removing the Modem ...................................................................2-11
Removing the Floppy Disk Drive Assembly ................................2-12
Removing the Mini PCI I/F Module .............................................2-13
Removing the Optical Device Assembly ......................................2-14
Part Lists ..................................................A-1
Part List Illustration Location ........................................................ A-2
L295T - Base ................................................................................. A-3
L295T - Bracket ............................................................................. A-4
L295T - Front ................................................................................ A-5
L295T - Toshiba DVD-RW ........................................................... A-6
L295T - FDD ................................................................................. A-7
L295T - HDD ................................................................................ A-8
Schematic Diagrams.................................B-1
System Block Diagram ...................................................................B-2
CPU Prescott - 1 of 2 ......................................................................B-3
CPU Prescott - 2 of 2 ......................................................................B-4
Clock Generator ..............................................................................B-5
MCH Power ....................................................................................B-6
MCH Host .......................................................................................B-7
MCH AGP ......................................................................................B-8
MCH Memory ................................................................................B-9
MCH Memory Termination ..........................................................B-10
DDR RIMM ..................................................................................B-11
DVO Chrontel CH7107A .............................................................B-12
LCD Connector .............................................................................B-13
CRT & USB ..................................................................................B-14
ICH5 (Power, LPC, Clock, SMbus) .............................................B-15
ICH5 (PCI, IDE, UHB, USB, LAN) ............................................B-16
Thermal & Fan Controller ............................................................B-17
Cardbus PCI1520 ..........................................................................B-18
IEEE 1394 .....................................................................................B-19
Cardbus Slot & Mini PCI .............................................................B-20
LAN RTL8100CL/8110SL ...........................................................B-21

Preface
VI
Preface
IDE Connector & Firmware Hub .................................................B-22
SIO W83627HF ............................................................................B-23
Serial & Parallel Port ....................................................................B-24
CODEC ........................................................................................B-25
Amplifiers & Inverter Connector .................................................B-26
Power 1 .........................................................................................B-27
Power 2 .........................................................................................B-28
Power 3 .........................................................................................B-29
Power 4 .........................................................................................B-30

Introduction
Overview 1 - 1
1.Introduction
1: Introduction
Overview
This manual covers the information you need to service or upgrade the L295T 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 L295T 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.

Introduction
1 - 2 System Specifications
1.Introduction
System Specifications
Feature Specification
Processor Types Intel® Pentium® 4 630/ 640/ 650 Processor with HT
Technology
LGA775 Package (775-pin)
(90nm) 90 Nanometer Process Technology, 2MB On-Die
L2 Cache & 800MHz Front Side Bus - 3.0/ 3.2/ 3.4 GHz
Intel® Pentium® 4 520/ 530/ 540/ 550 Processor with HT
Technology
LGA775 Package (775-pin)
(90nm) 90 Nanometer Process Technology, 1MB On-Die
L2 Cache & 800MHz Front Side Bus - 2.8/ 3.0/ 3.2/ 3.4
GHz
Intel® Pentium® 4 520J/ 530J/ 540J/ 550J Processor with
HT Technology
LGA775 Package (775-pin)
(90nm) 90 Nanometer Process Technology, 1MB On-Die
L2 Cache & 800MHz Front Side Bus - 2.8/ 3.0/ 3.2/ 3.4
GHz
Intel® Celeron® D 325J/ 330J/ 335J/ 340J/ 345J/
Processor
LGA775 Package (775-pin)
(90nm) 90 Nanometer Process Technology, 256K On-Die
L2 Cache & 533MHz Front Side Bus - 2.53/ 2.66/ 2.8/
2.93/ 3.06 GHz
Core Logic Intel 865GV + ICH5
LCD Options 15.0" XGA Flat Panel TFT (1024*768)
Security Security (Kensington® Type) Lock Slot BIOS Password

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 or updated due to the manufacturer's release schedule. Check with your service center for
details.
Table 1 - 1
System
Specifications

Introduction
System Specifications 1 - 3
1.Introduction
Memory Dual Channel
Two 200-Pin SODIMM Sockets, Supporting DDR 333 /
DDR 400 MHz Modules Only
(Note: Do Not Use Other Module Types)
Memory Expandable up to 2GB (256/ 512/ 1024 MB DDR
Modules)
Video Controller 865GV Integrated Chipset
Supports 3D Hardware Motion Compensation Shared Memory Architecture (Supports up to 64MB of Dynamically Allocated Shared Memory as Video Memory)
BIOS 4MB Flash ROM Phoenix BIOS
Storage One Fixed 3.5", 25.4mm Height Hard Disk Drive Supporting Both IDE and SATA Interfaces
One 3.5", 1.44MB 3-Mode Floppy Disk Drive (Exchangeable With 6-in-1 Card Reader Module or Video-Capture
Module)
One changeable 12.7mm(h) Optical Device (CD/DVD) Type Drive (see “Optional” on page C - 4 for drive options)
Audio AC’97 2.2 Compliant
Sound Blaster™ Compatible
Windows Sound System™ Compatible
2 * Built-In 2W Main Stereo Speakers
One Headphone-Out Jack
One Microphone-In Jack
One Line-In Jack
Interface One Serial Port
One Parallel Port
One External Monitor Port
Two PS/2 Ports (Keyboard & Mouse)
One Headphone-Out Jack
One Microphone-In Jack
One Line-In Jack
Four USB 2.0 Ports
One RJ-45 Jack for LAN
One RJ-11 Jack for Modem
One IEEE 1394 Port (Un-Powered) Enabled by Mini-PCI /IF IEEE 1394 Module (optional)
PC Card Sockets Supports Two Type II Slots or One Type III PCMCIA Slot (Cardbus Support)
Feature Specification

Introduction
1 - 4 System Specifications
1.Introduction
Communication 1000Mb Base-T Gigabit LAN Built-In (10/100Mb Base-T
Compliant)
Interchangeable V.90 (V.92 Compliant) / 56K MDC
Modem
OR
56K MDC Modem (V.92 Compliant) & Bluetooth Combo
Module (Factory Option)
802.11 b/ g Wireless LAN Module with Mini-PCI Interface
(Optional)
OR
IEEE 1394 Module with Mini-PCI Interface (Optional)
Power
Management Supports ACPI v1.0b Supports Hibernate Mode Power Button as Sleep/Resume Key Supports Standby Mode
Power Internal Switching Power Supply
Full Range -160W
Environmental
Spec Temperature Operating: 5°C ~ 35°C
Non-Operating: -20°C ~ 60°C
Relative Humidity
Operating: 20% ~ 80%
Non-Operating: 10% ~ 90%
Physical
Characteristics 369mm (H) * 384mm (W) * 188mm (D) Fan Bearing: Two Ball Bearings 8.9Kg Tilt (0-15 deg), Swivel (270 deg)
Optional Optical Drive Module Options:
CD-ROM Drive Module
Combo Drive Module
DVD-ROM Drive Module
DVD-Dual Drive Module
Options Below Exchangeable with Floppy Disk Drive
Module:
6-in-1 Card Reader Module - For MD/ CF/ SM/ MS/ SD/
MMC Formats (Factory Option)
Video Capture Card Module Supporting S-Video-In and
AV Terminal (Factory Option)
MDC Modem
OR
MDC & Bluetooth Modem Combo Module (Factory
Option)
802.11 b/ g Wireless LAN Module with Mini-PCI Interface
(Optional)
OR
IEEE 1394 Module with Mini-PCI Interface (Optional)
Feature Specification

Introduction
External Locator - Front View 1 - 5
1.Introduction
External Locator - Front View
1
2
4
2
3
43
Figure 1 - 1
Front View
1. LCD Panel
2. Speakers
3. LED Activity
indicators
4. Power Button

Introduction
1 - 6 External Location - Left & Right Side Views
1.Introduction
External Location - Left & Right Side Views

*Floppy Disk Drive &
Optional Modules
If you have either the
6-in-1 Card Reader,
or Video Capture
Card options, then
the optional module
will replace the floppy
disk drive module in
the slot at point .
1
Figure 1 - 2
Left & Right Views
1. Floppy Disk
Drive*
2. Hard Disk Drive
(HDD) Bay
3. CD Device
4. LCD Brightness
Control Knob
5. Volume Control
Knob
6. Dual PC Card
Slots
7. PC Card Eject
Buttons
8. Dual USB Ports
9. AC Power-In Port
10. Security Lock
Slot
2
7
6
5
4
8
Left
3
Right
9
1
10
5
4

Introduction
External Locator - Rear View 1 - 7
1.Introduction
External Locator - Rear View Figure 1 - 3
Rear View
1. Carrying Handle
2. Headphone-Out
Jack
3. Line-In Jack
4. Microphone-In
Jack
5. RJ-45 LAN Jack
6. RJ-11 Phone
Jack
7. Dual USB Ports
8. Unpowered -
IEEE 1394 Port
9. PS/2 Mouse &
Keyboard Ports
10. Printer/Parallel
Port
11. Serial Port
12. External Monitor
(CRT) Port
13. Vents
1
4 5 6
13
2 3 87
13
10 11 12
13
13 13
9

Introduction
1 - 8 Mainboard Overview - Top
1.Introduction
Mainboard Overview - Top
Key Parts
Figure 1 - 4
Mainboard Over-
view - Top
Key Parts
1. CPU Socket (no
CPU Installed)
2. Intel Springdale-
G (North Bridge)
3. RAM Sockets
4. Mini PCI Socket
for WLAN or
IEEE1394
5. FLASH BIOS
6. CMOS Battery
7. Cardbus
PCI1520
56
7
4
1
3
2

Introduction
Mainboard Overview - Bottom 1 - 9
1.Introduction
Mainboard Overview - Bottom
Key Parts Figure 1 - 5
Mainboard Over-
view - Bottom
Key Parts
1. Chrontel
CH7017A
2. Clock Generator
3. Intel ICH-5 460
mBGA (South
Bridge)
4. SUPER I/O
Winbond
W83627HF
5. AC’97 MDC
Module
45
3
1
2

Introduction
1 - 10 Mainboard Overview - Top
1.Introduction
Mainboard Overview - Top
Cable Connectors and Switches
Figure 1 - 6
Mainboard Top
Cable Connectors &
Switches
1. Floppy Disk Drive
(CN5)
2. TV Port or Touch
Screen (Bluetooth
use)
3. CD/DVD Device
(CN7)
4. Fan Power (CN9)
5. Inverter (CN1)
6. Modem Module
7. Speaker (CN31)
8. Modem Cable
(CN33)
9. PC CARD (CN13)
10. Touch Screen
(CN16)
11. IEEE1394 (CN36)
12. USB 2.0 (CN17)
13. LED Board
(CN30)
14. Speaker (CN32)
15. Power (CN12)
16. Hard Disk (CN34)
1
2
3
4
5
6
78
9
10 11 12
13 14
15
16

Introduction
Mainboard Overview - Bottom 1 - 11
1.Introduction
Mainboard Overview - Bottom
Cable Connectors and Switches Figure 1 - 7
Mainboard Bottom
CableConnectors&
Switches
1. CN35 (LCD
Connector)
1

Introduction
1-12
1.Introduction