Acer Extensa 900 Maintenance Manual

                                                                                        Operating Instructions   3-7
¨To protect the CD against scratches and dirt when not in use, keep the CD in 
its protective case.
¨Clean a CD with a clean, dry, lint-free cloth.  Always wipe from the center to 
the edge. Don’t wipe the CD in a clockwise or counterclockwise direction.
¨Keep CDs away from high temperatures and direct sunlight.
3.5 Built-In Sound System
The Extensa 900 Series Notebook comes with an...

3-8  Operating Instructions 
3.5.3 External Sound Equipment
You can improve the quality of sound production and increase convenience by 
connecting external sound equipment.
The computer has the following jacks for connecting to external sound equipment:
¨Microphone Input
¨Stereo Headphone/Speaker Line Output
¨Stereo Line Input
3.6 Using Remote Connections
The computer can send and receive e-mail, surf the Internet, connect to one of the 
online services or share files with other office employees. 
The...

                                                                                        Operating Instructions   3-9
3.7 Using Zoomed Video Features
Your computer supports Zoomed Video (ZV) PC Cards through the PC Card slots. ZV 
PC Cards connect to the internal ZV port, allowing advanced multimedia capabilities 
such as video conferencing and on-screen television at full, smooth motion. The Zoomed 
Video port adds a dedicated video bus that provides a direct link between a PC Card 
and the VGA...

3-10  Operating Instructions 
3.8.2 Suspending Operation While Idle
Although the computer goes into Suspend mode automatically after a defined period of 
inactivity, you can reduce energy consumption even further by pressing either Fn+F3 
(Suspend) or Fn+F4 (Standby) as soon as you no longer need the computer to be active.
¨Pressing Fn+F4 (Standby) turns off the screen.
¨Pressing Fn+F3 (Suspend) turns off the screen, stops the hard disk drive, and 
reduces energy usage to the lowest level possible...

                                                                                        Operating Instructions   3-11
3.8.4 Replacing the battery
If you have a spare, charged battery, you can do one of the following.
¨Insert a secondary battery into the MPB option (if installed).
¨If you already have a battery in a docked MPB, you can replace the primary 
battery without turning off the computer.
¨If you cannot insert the spare battery, suspend operations to disk by pressing 
Fn+F2 and replace the...

                                                                                                              Theory of Operation  4-1  
4
Theory of Operation
4.1 Introduction
This section contains a general block diagram theory of operation description of the 
Extensa 900 Series Notebook Computers.
Note: Various internal components may change on future models and 
busses/bus speeds are subject to change.
4.2 Notebook Functional Overview
The Extensa 900 Series Notebooks consist of eight major functions...

4-2   Theory of Operation
Figure 4-1  Extensa Functional Block Diagram
586
CPU
SRAMM1521
BGA
DRAM
HDD
M1523
Graphic
controller
IDE Master
CD
CPU Bus
PCI Bus
ISA Bus
MPB 

                                                                                                            Theory of Operation  4-3  
4.2.1 System Processor
The System Processor function for the notebook is implemented on the Main Board  in 
the form of an Intel Pentium P54-C Superscalar 586 Processor Chip. The processor 
operates in conjunction with RAM and ROM Memory and other control logic to process 
software instructions (BIOS, DOS, Windows, and applications). The processor 
communicates with the...

4-4   Theory of Operation
Figure 4-2  Detailed System Block Diagram
CPUM1521
M1523 PCI BUS
ISA BUS
PCI1130 65550/S3PCI0643
PCI0643
ESS1878S
M38813M6377
87338
CD-ROMFDD
PARALLEL
PORT SERIAL
PORTFIR PARALLEL
PORTSERIAL
PORT
HDD
PCMCIA
CRT
LCD VIDEO
RAM
INTERNAL
KBPS2TOUCH
PAD
L2 CACHE
16MB
RAMDIMM*1
HOST BUS
BIOS
$CPU_D(63:0)
$CPU_A(31:3)$CPU_D(63:0)
$CPU_A(17:3)$CPU_D(63:0)$CPU_A(31:3)
AD(31:0) $MD(63:0)
$MA(11:0)
AD(31:0)AD(31:0)
AD(31:0)
AD(31:0)
AD(31:0)
AD(31:0)
SD(15:0)
SD(15:0)
SD(15:0) SD(15:0)...