Clevo 2800 User manual

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2800/2820/2850
Notebook Computer
Service Manual

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Preface
copyrights
NOTICE
The company reserves the right to revise this publication or to change its contents without notice. Information con-
tained 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 endorse-
ment of that product or its manufacturer.
First Edition ©January, 2000
Trademarks
Intel®,Pentium®and Pentium®with MMX™ technology are registered trademarks of Intel Corporation.
IBM®and OS/2®are registered trademarks of IBM Corporation.
MS-DOS®, Windows®,Windows®95 and Windows NT™ are registered trademarks of Microsoft Corporation.
SystemSoft®and CardWizard®are registered trademarks of SystemSoft Corporation.
Other brand and product names are trademarks and/or registered trademarks of their respective companies.

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the manual
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 notebook
computer. The following information is included:
Chapter 1, Introduction, provides general information about the location of system elements and their specifications.
Chapter 2, Chipset, briefly describes the computer’s core logic, memory and supporting chipset.
Chapter 3, Disassembly, provides step-by-step instructions for disassembling parts and subsystems and how to up-
grade elements of the system.
Chapter 4,Troubleshooting, provides recommendations on how to solve possible system problems.
Appendix A, Part Lists
Appendix B, 2800 Circuit Diagrams
Appendix C, 2820/2850 Circuit Diagrams

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Preface
related
RELATED DOCUMENTS
You may also need to consult the following manuals for additional information:
User’s Manual
The standard manufacturer’s configuration includes a printed Concise User’s Manual (usually in the language of the
destination market) and a complete ‘expanded’ User’s Manual on an accompanying CD-ROM.
Both the Concise User’s Manual and the CD-ROM based ‘expanded’ User’s Manual describe the notebook’s basic fea-
tures and the procedures for operating the computer. The ‘expanded’ manual also describes the installation & opera-
tion of the utility programs and how to upgrade the system’s RAM and HDD.
Last Resort: The Manufacturer
If you can’t find the information you need in these documents or your up-line source, contact the manufacturer at:
www.clevo.com.tw

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table of contents
TABLE OF CONTENTS
Preface
Cover .................................................................................................................................................................................................... i
Notice .................................................................................................................................................................................................. ii
About This Manual ............................................................................................................................................................................ iii
Related Documents........................................................................................................................................................................... iv
Table of Contents ................................................................................................................................................................................ v
Chapter 1: Introduction
System Specifications ......................................................................................................................................................................1-2
CPU .............................................................................................................................................................................................1-2
Memory ......................................................................................................................................................................................1-2
Core Logic ...................................................................................................................................................................................1-2
BIOS .............................................................................................................................................................................................1-3
Video ...........................................................................................................................................................................................1-3
Drives ..........................................................................................................................................................................................1-3
Audio...........................................................................................................................................................................................1-3
I/O ...............................................................................................................................................................................................1-4
Interface ......................................................................................................................................................................................1-4
Power System .............................................................................................................................................................................1-4
Other Features (optional) ...........................................................................................................................................................1-5
Environment .....................................................................................................................................................................................1-5
Physical ............................................................................................................................................................................................1-5
External Locator ...............................................................................................................................................................................1-6
Chapter 2: Chipset
CPU - Intel Mobile Pentium III/Pentium II/Celeron....................................................................................................................... 2-4
Core Logic Chipset - Intel 440BX AGPset ..................................................................................................................................... 2-5
North Bridge, AGPset System Controller, 443BX .................................................................................................................... 2-5

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Preface
South Bridge, PCI ISA IDE Xcelerator, 82371EB/MB (PIIX4E/M) .............................................................................................. 2-6
Supporting Chips ............................................................................................................................................................................ 2-8
Ricoh 5C475 PCI-CardBus Bridge............................................................................................................................................ 2-8
SMSC FDC37N869 PC 99 ....................................................................................................................................................... 2-10
Compliant 5V and 3.3V Super I/O Controller with Infrared Support .................................................................................. 2-10
ATI RAGE LT Pro Graphics Controller ....................................................................................................................................... 2-11
YAMAHA YMF744B DS-XG ..................................................................................................................................................... 2-12
Chapter 3: Disassembly
Connections .................................................................................................................................................................................... 3-2
Maintenance Precautions ........................................................................................................................................................ 3-3
Battery Precautions ................................................................................................................................................................... 3-3
Cleaning .................................................................................................................................................................................... 3-4
Maintenance Tools.................................................................................................................................................................... 3-4
General Disassembly: Under the Keyboard ................................................................................................................................ 3-5
Removing the Keyboard & Heat Plate .................................................................................................................................... 3-5
Changing the CPU .................................................................................................................................................................... 3-6
General Disassembly: Removing & Replacing the LCD Module................................................................................................ 3-8
Replacing the LCD ................................................................................................................................................................... 3-10
12.1” Disassembly .............................................................................................................................................................. 3-10
14.1 & 15.1” Disassembly ................................................................................................................................................... 3-10
Removing the Inverter Board ............................................................................................................................................ 3-10
General Disassembly: Top Cover Assembly .............................................................................................................................. 3-12
Separating the Top Cover Assembly ..................................................................................................................................... 3-12
General Disassembly: Top Cover Components......................................................................................................................... 3-14
TouchPad ................................................................................................................................................................................. 3-14
General Disassembly: Bottom Cover Assembly ........................................................................................................................ 3-16
HDD Module............................................................................................................................................................................ 3-16
FDD Module............................................................................................................................................................................. 3-16
Mainboard & Frame (not shown) .......................................................................................................................................... 3-16
Switches & Connectors ................................................................................................................................................................3-20
table of contents

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Chapter 4: Troubleshooting
Before You Begin ............................................................................................................................................................................ 4-2
Tools ........................................................................................................................................................................................... 4-2
System Troubleshooting Chart ...................................................................................................................................................... 4-3
Pre-POST Assistant ......................................................................................................................................................................... 4-4
AC Power LED Fails ................................................................................................................................................................... 4-5
AC/DC Adapter .................................................................................................................................................................... 4-5
AC Power & Charge LEDs Fail .................................................................................................................................................. 4-6
Checking the DC/DC Board ................................................................................................................................................ 4-6
Checking the Battery Pack and its Cabling ...................................................................................................................... 4-9
Checking the Battery Pack ............................................................................................................................................ 4-9
Checking the Cabling .................................................................................................................................................. 4-10
Checking the Mainboard ................................................................................................................................................. 4-10
LCD Screen Failure to Display.................................................................................................................................................. 4-11
Checking the LCD to Mainboard Connection................................................................................................................... 4-11
Checking the Inverter Board ............................................................................................................................................. 4-12
Checking the LCD Screen .................................................................................................................................................. 4-13
POST — Testing the System ......................................................................................................................................................... 4-14
No Errors Found During the POST .......................................................................................................................................... 4-14
POST Error Beeps & Screen Messages ................................................................................................................................. 4-15
Post-POST Problems.....................................................................................................................................................................4-23
PC Card Socket Malfunction...................................................................................................................................................4-24
Sound Output Failure ..............................................................................................................................................................4-25
Checking the Software Configuration ..............................................................................................................................4-25
Checking the Volume ........................................................................................................................................................4-25
Checking the Speaker Cable ............................................................................................................................................4-26
Suspend Function Failure ....................................................................................................................................................... 4-27
Charge LED Failure.................................................................................................................................................................. 4-27
Appendix A: Part Lists
Appendix B: 2800 Circuit Diagrams
Appendix C: 2820/2850 Circuit Diagrams
table of contents

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1Introduction
This manual covers the information you need to service or upgrade the 2800/2820/2850 Notebook Computer.
Information about operating the computer (e.g. getting started, and the Setup utility) is in the User’s Manual. Infor-
mation 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, 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 notebook is designed to be upgradable. The 2800 supports Intel Pentium II & Celeron CPUs of different speeds
and 12.1” & 14.1” TFT color LCD screens. The 2820 supports Intel Pentium III & Celeron CPUs of different speeds
and 12.1” & 14.1” TFT color LCD screens while the 2850 supports Intel Pentium III & Celeron CPUs of different
speeds and 15.1” TFT color LCD screens. In addition, system memory, hard disk, and BIOS are also upgradable. See
Chapter 3, “Disassembly,” for a detailed description of the upgrade procedures for each specific component.
Please note the warning and safety information indicated by the “M” symbol.
The balance of this chapter reviews the computer’s technical specifications and external features.

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Introduction
SYSTEM SPECIFICATIONS
CPU (2800) (2820 & 2850)
Package MicroPGA1 MicroPGA2
Type Pentium II, 300MHz~400MHz Pentium III, 450MHz or faster
Celeron, 300MHz~400MHz Celeron, 450MHz or faster
MEMORY
L1 cache (in CPU) 16KB code + 16KB data 16KB code + 16KB data
L2 cache Pentium II: 256KB SRAM Pentium III: 256KB SRAM
(on die) Celeron: 128KB SRAM Celeron: 128KB SRAM
RAM base 0MB (onboard) same
RAM expansion 2 S.O.DIMM sockets (144 pin) same
DIMM sizes: 32MB, 64MB, 128MB same
standards: 3.3-volt same
modes: SDRAM same
speed: 66MHz or faster speed: 100MHz or faster
use: singly, mixed* or identical pairs same
maximum expansion: 256MB same
*Both must be the same speed
CORE LOGIC
440BX AGPset, 66MHz 440BX AGPset, 100MHz
specifications

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BIOS
512KB Flash ROM, Plug ‘n Play 1.0a, LBA, APM 1.2, ACPI
VIDEO
memory 4MB/8MB SGRAM
chipset ATI 3D Rage LT Pro AGP (with 3D, AGP & ZV support/proprietary driver)
architecture 64-bit 2x AGP bus with Windows Acceleration
display TFT (active matrix)
12.1” SVGA, (800 x 600) at 24-bit color (TrueColor)
14.1” XGA, (1024 x 768) at 32-bit color (TrueColor)
15.1” XGA, (1024 x 768) at 32-bit color (TrueColor)
DRIVES
HDD module semi-removable 2½” (9.5mm) , PCI local bus IDE interface
FDD module 3.5”, 1.44MB (3-mode)
Device Bay
CD-ROM module 24X, full size (5.25”) ATAPI interface tray-loading mechanism,
access time below 100ms
or DVD module 4X or faster, full size (5.25”) ATAPI interface tray-loading mechanism,
access time below 100ms (with software MPEG support)
AUDIO
chipset Yamaha YMF744B (DS-XG), proprietary driver
architecture 32-bit PCI bus
type 64-voice dual-audio engine, AC-3 speaker virtualization, PnP, up to 20-bit ADCDAC
audio resolution, I2S/zoomed video, high quality MIDI synthesis
sampling max. record & playback up to 48 KHz stereo (WAVE audio)
3D HRTF 3-D positional audio under DirectX™ 5.0
compatibility Sound Blaster Pro™ legacy audio, MS Windows Sound System™
interface speakers (phones), microphone, line-in
speakers 2 built-in: 0.5W stereo amp.
specifications

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Introduction
I/O
USB 2 ports, compliant with UHCI 1.1, USB 1.0 & PCI 2.1
Serial 1 9-pin, 16C550 compatible
Serial 2 infrared, IrDA v 1.1, FIR, SIR compatible
Parallel 25-pin, ECP, output-only, bi-directional
CRT15-pin VGA
PS/2 6-pin, mini-din, mouse or keyboard
PC Card one Type I or Type II socket, PC Card 3.0, ZV port & CardBus compliant
INTERFACE
keyboard 87-key or 90-key (depending on the language)
Windows 95 compliant with embedded numeric keypad
pointing device PS/2 TouchPad (built-in), MS-Mouse compatible
POWER SYSTEM
adapters (external) universal, auto-sensing switching
input: 90-240VAC @47- 63Hz
output: 60W, 20V, 3A
battery pack(s) Li-Ion: smart battery with gauge circuit
Ni-MH: dumb battery without gauge circuit
battery charge time Fast (system off) approx. 2.5 hours per battery, 2000mA ±200mA
Slow (system on) approx. 7 hours per battery, 700mA ± 50mA
(based on a 3000mA smart battery)
life per charge approx. 2.5hrs per battery (based on an Intel Pentium III 500 MHz CPU,
running “ZD BatteryMark 3.0” software in the Windows 98 operating system)
management BIOS control, APM ver 1.2
levels: full-on, standby, suspend-to-RAM/suspend-to-disk (0 volt)
specifications
¯¯
Advanced Users
Actual battery life per
charge may differ from this
figure. It will vary depend-
ing on the system configu-
ration, the condition of the
battery, the environment,
setup, and working habits.

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OTHER FEATURES (OPTIONAL)
56K Fax/Data/Voice modem
10/100 Mbps PCI Ethernet Controller
ENVIRONMENT
operating temp. 0oC to 35oC (32oF to 95oF)
storage temp. -10oC to 65oC (14oF to 149oF)
operating humidity 40% to 80%, non-condensing
storage humidity 10% to 90%, non-condensing
altitude 8000 feet
shock (unpacked) 5G (11 + 1 microsecond pulse)
PHYSICAL
2800 (12.1”/14.1” LCD capable):
dimensions 312mm(w) x 262mm(d) x 34.5mm(h)
weight 2.95Kg (with Li-Ion battery, FDD, HDD, CD-ROM & 14.1” LCD)
2820 (12.1”/14.1” LCD capable):
dimensions 312mm(w) x 262mm(d) x 36/37.5mm(h)
weight 2.95Kg (with Li-Ion battery, FDD, HDD, CD-ROM & 14.1” LCD)
2850 (15.1” LCD):
dimensions 326mm(w) x 267mm(d) x 37.5mm(h)
weight 3.22Kg (with Li-Ion battery, FDD, HDD, CD-ROM & 15.1” LCD)
specifications

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Introduction
external locator
FRONT VIEW
FIG. 1 – 1
1. LCD
2. Cover latch
3. Speakers
4. On/Off switch
5. LED system status indicators
6. Keyboard
7. TouchPad & buttons
8. LED power status indicators
9. Microphone
10. Audio line-in jack
11. Mic jack
12. Phone jack
EXTERNAL LOCATOR
The following figures show the external locations of the computer’s main subsystems.
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BOTTOM VIEW
FIG. 1 - 2
13. Device bay
14. Battery bay
15. RAM bay
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LEFT VIEW
FIG. 1 – 3
1. Kensington lock port
2. PC Card slot
3. IrDA (serial 2) port
4. USB ports
5. FDD
RIGHT VIEW
FIG. 1 – 4
6. CD-ROM module (option)
or DVD ROM module (option)
7. Adapter port
REAR VIEW
FIG. 1 – 5
8. PS/2 port
9. COM (serial 1) port
10. Parallel port
11. Fan
12. External monitor port
13. Fax/Modem (option)
14. LAN port (option)
external locator
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Introduction
notes
NOTES:

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2Chipset
The computer is completely AT-compatible. Its chipset supports a high-performance PCI bus video interface and
state-of-the-art power management features. This chapter mainly describes the following major system components:
• CPU • Core logic chipset • Supporting chips
The following figures are the system block diagram and the chipset site diagram. These provide an overview of the
computer’s layout and a practical locator for chipset components.
SYSTEM BLOCK DIAGRAM
FIG. 2 – 1

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Chipset
CHIPSET SITE DIAGRAM
FIG. 2 – 2
1. Video SGRAM
2. Video Controller
ATI Rage LT Pro
3. PCI-CardBus Bridge
Ricoh 5C475
4. LAN Controller
AMD PCnet™ Fast III
AM79C973
5. Core Logic chip
82443BX
6. Keyboard Controller
Hitachi HB/3434
7. SW1 & SW2
8. CN28 DIMM socket “0”
9. CN29 DIMM socket “1”
10. Core Logic chip
82371EB (2800)
82371MB (2820 & 2850)
11. Audio controller
YAMAHA YMF744B
12. Super I/O controller
SMSC FDC37N869
13. 4MB FLASH ROM BIOS
AMD AM29LV004BT
14. Audio CODEC
AKM AK4543 VQ
component sites
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CHIPSET SITE DIAGRAM (CONT.)
FIG. 2 – 2
15. LAN Transformer
LF-H71P
16. Video SGRAM
17. CPU
component sites
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Chipset
CPU - INTEL MOBILE PENTIUM III/PENTIUM II/CELERON
The 2800 uses the Intel Mobile Pentium II/Celeron processor in a microPGA1 package. The Intel Mobile Pentium
II/Celeron processor features an integrated L2 cache (256KB for Pentium II and 128KB for Celeron) and a 64-bit
high performance system bus.
The 2820 & 2850 use the Intel Mobile Pentium III/Celeron processor in a microPGA2 package. The Intel Mobile
Pentium III/Celeron processor features an integrated L2 cache (256KB for Pentium III and 128KB for Celeron) and
a 64-bit high performance system bus.
The Mobile Pentium III/Pentium II/Celeron processor’s 64-bit wide Low Power Gunning Transceiver Logic system
bus is compatible with the 440BX AGPSet and provides a glue-less, point-to-point interface for an I/O bridge/
memory controller.
The Intel Mobile PentiumIII/Pentium II/Celeron processors are fully compatible with all software written for the
Pentium processor with MMX technology, Pentium processor, Intel486 microprocessor, and Intel386 microproces-
sor. In addition, they provide improved multimedia & communications performance. They feature:
• Performance improved over existing mobile processors
- Supports the Intel Architecture with Dynamic Execution
- Supports the Intel Architecture MMX technology
• Integrated primary (L1) instructions and data caches
- 4-way set associative, 32-byte line size, 1 line per sector
- 16-Kbyte instruction cache and 16-Kbyte writeback data cache
- Cacheable range programmable by processor programmable registers
• Integrated second level (L2) cache
- 4-way set associative, 32-byte line size, 1 line per sector
- Operated at full core speed
- 128/256-Kbyte, ECC protected cache data array
• Low Power GTL+ system bus interface
- 64-bit data bus, 66-MHz operation
- Uniprocessor, two loads only (processor and I/O bridge/memory controller)
- Short trace length and low capacitance allows for single ended termination
• Voltage reduction technology
• Pentium III processor clock control
- Quick Start for low power, low exit latency clock “throttling”
- Deep Sleep mode for extremely low power dissipation
• Thermal diode for measuring processor temperature
CPU

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CORE LOGIC CHIPSET - INTEL 440BX AGPSET
The Intel 440BX AGPset consists of the BX System Controller (443BX) and the PCI ISA IDE Xcelerator (PIIX4E/
PIIX4M). The AGPset forms a Host-to-PCI bridge and provides the second level cache control and a full function
64-bit data path to main memory.
NORTH BRIDGE, AGPSET SYSTEM CONTROLLER, 443BX
The BX System Controller (443BX) integrates the cache and main memory DRAM control functions and provides
bus control to transfer between the CPU, cache, main memory, AGP bus and the PCI Bus.
Features
core logic chipset
• Supports the host bus of the Pentium II & III processor families
at 66MHz and 100MHz at 3.3V respectively
• PCI 2.1 compliant
• Integrated Data Path
• Integrated DRAM controller
- 8Mbytes to 256Mbytes main memory
- 64Mbit DRAM/SDRAM technology support
- EDO and SDRAM DRAM support
- Integrated programmable-strength for DRAM interface
- CAS-Before-RAS refresh, extended CBR and self refresh for
EDO
- CAS-Before-RAS and self refresh for SDRAM
• Fully synchronous, minimum latency 30/33 MHz PCI bus in-
terface
- Five PCI bus masters (including PIIX4)
- 10 DWord PCI-to-DRAM read prefetch buffer
- 18 DWord PCI-DRAM post buffer
- Multi-Transaction timer to support multiple short PCI trans-
actions
• AGP Features
- AGP 1.0 compliant
- 66/133 MHz data transfer capability
- Supports concurrent CPU, AGP and PCI transactions
• Power Management Features
- Dynamic stop clock support
- Suspend to RAM (STR)
- Suspend to Disk (STD)
- Power On Suspend (POS)
- Internal clock control
- SDRAM and EDO self refresh during suspend
- ACPI support
- Compatible SMRAM (C_SMRAM) and Extended SMRAM
(E_SMRAM)
- SMM write-back cacheable in E_SMRAM mode up to 1MB
• Supports the Universal Serial Bus (USB)
• 492 Pin BGA 440BX AGPset with integrated data paths