Acer Extensa 570 Mantenance Manual

							2.6Installing the AC Power Adapter
Use the following procedures to connect the AC Adapter to the system:
cCaution: Use only the AC Adapter supplied with the computer; other
adapters can damage the unit.
1.
  Remove the AC adapter from the packaging. Connect the round coaxial
connector on the AC Adapter to the power receptacle on the left side
(rear corner) of the notebook as shown in Figure 2-7.
2. Connect the female side of the AC Power cord to the AC Adapter and
connect the male end to a grounded AC outlet.
2.7 Initial System Checkout
After you’ve installed all internal options and external cabling, you’re ready
for system checkout and software configuration.
To check out the system, set the power switch on the notebook to the On
position which initiates the notebook self test. During self test execution,
the computer checks the operation of all critical hardware including
memory and CPU (and displays copyright and version number data during
test execution).
AC Adapter
AC Power 
(120VAC to 230 VAC,
50 to 60 Hz)
Figure 2-7   AC  Adapter Installation
     
2-10 
Installation 
						

							Upon successful conclusion of self test, the computer automatically loads its
operating system and Windows environment. If self test fails to complete
and an error message is displayed, try powering down the computer for a
couple of minutes and turning power back on to repeat self test. If the error
message persists, see Section 5 for troubleshooting information (also refer to
Appendix A for self test error message descriptions).
2.8 Configuring the System
The first time you power up the notebook, it automatically runs the Setup
Program which prompts you for country name and printer type. You exit
Windows and the notebook begins unzipping files and preparing the
software for use. After initial installation, and the timeout occurs, the demo
may begin. To stop the demo, move the cursor to the center of the screen
and click the left mouse button. A number of demo options are then
available.
2.9 Making Backups of System Software
The Notebook is preloaded with Windows 95 operating system software.
Prior to extended use of the notebook, create a backup set of system
software using the Backup Utility under Windows 95. In the event of a disk
problem, you can restore your system using the Restore Utility and the set
of backup diskettes you’ve just created.
2.10Loading Application Software
For assistance in loading Application Software, refer to Chapter 5 in the
Extensa Series Notebook Computer User’s Reference Manual.
       
Installation 2-11 
						

							3
Operating Instructions 
3.1Introduction
This section describes the Extensa 57x Series Notebook operating controls
and indicators.
n
Note: 
 For additional operating instructions, refer to the Extensa 57x Series
Notebook Computer Users Guide.
3.2Notebook Controls and Indicators
The Extensa Series Notebooks are equipped with the following controls and
indicators:
·Alternate action Power Button in the upper left corner above the
keyboard
·Status LCD centered above the keyboard - ICONs are used to convey
status information (refer to Figure 3-1)
·Embedded special function keys in the keyboard (including Contrast
and Brightness Control) are activated by the Fn
 key
Power
Button
Status LCD Display
Glidepad
(Mouse)
Mouse Select
Buttons
Figure 3-1  Extensa Series Controls and Indicators
Operating Instructions 3-1 
						

							3.2.1LCD Contrast Control
The TFT version of the notebook contains no operating controls or
indicators. Use the function keys to adjust the contrast and brightness. TFT
versions are unaffected by contrast key adjustments.
3.2.2Button Switches
The notebook contains one button switch above the keyboard: the Power
On/Off 
Switch. This button is an alternate action type switch that controls
power to the unit. Pressing the Power button causes power to be applied to
the notebook, power up self test to be run and Windows 95 to be loaded.
When the Power button is pressed again, the Notebook powers down and all
data in RAM memory is lost.
3.2.3Cover Release Latch
The Notebook contains a Cover Release latch near the center of the top
cover. To open the notebook, lift up on the release mechanism along the
front edge of the notebook.
3.2.4Glidepad Controls
The Extensa 57x Series Notebook Computers are equipped with a built-in
mouse device called the glidepad physically located at the base of the
keyboard (refer to Figure 3-1).
The cursor is positioned by touching and dragging your finger in the
direction you want the cursor to go. The select functions are performed
either by tapping the glidepad or by pressing the two buttons (switches) at
the bottom of the keyboard.
You can change the operation of the pad by changing values in the mouse
section of the Windows 95 Control Panel. Once your cursor is in the proper
place and you want to select, use the left button to click or double-click just
as you would with a mouse.
3.3Operating Procedures
Some of the operating features useful for notebook maintenance are
provided in the following paragraphs. For additional operating instructions,
refer to the Extensa 57X Series Notebook Computer User’s Manual.
3.3.1 Floppy Drive Operating Procedures
To avoid damaging the floppy drive, and to protect data, take the following
precautions:
·Never turn off or reset the notebook while the floppy activity indicator is
lit.
·Keep the AC adapter at least 6 inches away from your drive.
      
3-2 
Operating Instructions 
						

							·Insert the floppy into the floppy drive slot with the label side up and the
metal-shutter end first. Gently push the floppy into the floppy drive slot
until the floppy clicks into place.
·To remove a floppy diskette, press the eject button until the floppy pops
out.
·Never force open the access shutter on a floppy.
·Always remove a floppy from the floppy drive before turning off the
computer.
·Never transport the computer with a floppy in the floppy drive. Doing so
can damage the drive head.
·If a floppy appears to be damaged, try to make a copy of it, and
immediately discard it.
·Keep all floppies when not in use in a disk storage box to protect them
from damage or loss.
          
Operating Instructions 3-3 
						

							3.3.2 Installing/Removing PCMCIA Options
PCMCIA cards are inserted and ejected in much the same way as diskettes:
·Up to two Type I or Type II PCMCIA options may be installed in the
compartment on the right side of the notebook. One Type III Option may
be installed in the lower slot.
·To insert a PCMCIA card, align the card with the socket and slide the
card into the socket until it locks into place. To install a Type III option,
you must remove the Floppy Drive.
·To eject a PCMCIA card, go to the Windows 95 Control Panel, select PC
Card
 and select the card to stop; then press the release button and
remove the PCMCIA option.
3.3.3Computer Hot Keys
·
Refer to the User’s Guide shipped with the notebook for a description of
the recognized hot keys.
3.3.4Responding to Low Battery Conditions
The computer generally will notify you when you are reaching a low battery
condition by performing the following actions: 
·One beep every 10 seconds (unless battery warning is disabled)
·The battery low warning is automatically disabled when the AC Adapter
is installed on the notebook regardless of the charge condition of the
battery pack.
·If the AC adapter is not plugged in within three minutes of a detected
battery low condition, the notebook enters Standby mode. 
·The Notebook returns to the normal operating mode when the power
switch is activated. Unit then recovers RAM information from the hard
drive and restores unit to previous On condition.
3.3.5Minimizing Power Usage
The following actions can minimize power usage and protect your work
during the critical minutes before you shut the system down or replace one
of  the battery packs with a fully charged pack:
·Press Ctrl-Standby 
to shut off the alarm (if it’s enabled)
·Save RAM Disk (if using RAM Disk feature)
·Power down the system if you do not need the computer
      
3-4 
Operating Instructions 
						

							3.3.6Recharging the Battery Packs
A standalone battery charger option is available to charge notebook battery
packs. The battery packs may also be charged in the notebook as follows: 
1. Install the battery pack(s) in your computer (if not already installed).
2. Connect the AC Adapter as described in Section 2.
3. To fully charge the battery pack, leave it charging in the Notebook for 
at least another 90 minutes.
4
. Periodically recondition the primary battery (Nickel Metal Hydride) as
described in Paragraph 3.3.7.
3.3.7Conditioning the Primary Battery
 The primary battery pack is a Nickel-Metal Hydride type that requires
periodic deep discharge and recharge in order to accept a full charge
(approximately every 5 or 6 charge/recharge cycles). To condition the main
battery, use the following procedure:
1. Remove the secondary battery (if installed in the Floppy Drive bay) 
and AC Adapter (if installed).
2. Power up the computer and leave it on until the primary battery is
completely discharged; then reconnect the AC adapter and fully
charge the battery. Reinstall the secondary battery in the Floppy Bay
(if using a secondary battery pack).
3.3.8Restoring Missing System Files
When you power up the Notebook, it automatically checks for certain key
files that must be present for normal system operation. If any of these files
are accidentally erased, as indicated by error message, insert the
Windows95 Startup diskette and reboot the system. This will allow you to
boot up and troubleshoot your system.
3.3.9Rebuilding the System Software
In the event of a hard drive replacement or system board replacement which
resulted in loss of system software, you may need to rebuild the entire
system software structure.
 The following items are required to rebuild the system software:
·Set of backup diskettes of the system software
·Operational Notebook
Insert the Windows 95 Startup diskette in the Notebook’s floppy drive and
power up the system.
          
Operating Instructions 3-5 
						

							n
Note
: For additional operating procedures, refer to to the Extensa 500 Series
Notebook Computer User’s Manual, 
Texas Instruments Part No. 
9803942-0001.
      
3-6 
Operating Instructions 
						

							4
Theory of Operation
4.1Introduction
This section describes the notebook theory of operation.
4.2Notebook Functional Description
Functionally, the notebook computer consists of the following major
subsystems:
·Processor and Memory Subsystem
·I/O Subsystem
·Video Subsystem
·Hard Disk Subsystem
·Floppy Disk Subsystem
·CD-ROM Subsystem
·PCMCIA Subsystem
·Sound Subsystem
·Serial Infrared Subsystem
·Power Subsystem
A functional block diagram of the Extensa 57x Series Notebook is shown in
Figure 4-1.
4.2.1Processor/Memory Subsystems
The Processor function, housed on the Main Board, is implemented with the
IntelÔ
 Pentium Processor (P54C/LM). The processor operates in
conjunction with RAM and ROM Memory on the Memory Board and other
control logic on the Main Board to process software instructions (BIOS,
Windows 95, and Applications).
Primary control for the Processor/Memory subsystem is implemented with
the Pentium Chipset (Opti Viper 82C556/82C557).
The memory subsystem, implemented on the Memory Board and optional
Dual Inline Memory Modules, provides 8 MB (expandable to 40 MB) of fast
 Theory of Operation 4-1 
						

							DRAM memory, 128 bytes of CMOS RAM (battery backed up) and 256 KB of
Flash ROM for system and video BIOS storage.
The basic 8 MB memory system can be expanded to a maximum of 40 MB
by the addition of two DIMM memory modules (refer to Section 6 for
installation details).
Tables 4-1 through 4-3 contain the Notebook I/O address map, DMA
channel assignments and IRQ interrupt level assignments respectively.
MAIN BOARD
SYSTEM &
SVGA BIOS
INTERNAL 1.44 MB
FLOPPY DISK DRIVE
PARALLEL
PRINTER PORT
Super I/O
Control ler
RS232
SERIAL PORTDrivers/
Receivers
Expansion Bus
Connector
PCMCIA Adapter
UM8365A
SIR
In ter face
PCMCIA Option Slot(s)
Pentium
Pr ocess or
(P54C/LM)
IR/Sound 
Board DRAM
(2 Bank)
PCI Bus
Cache MEMORY
DBC
82C556
Audio IN/OUT
Mic In CPU Data
System
Controller
82C557
CPU Address
      IPC Memory
Data
EXTERNAL
SVGA MONITOR
Input From 
AC Adapter
Battery Packs
Video 
Controller
INTERNAL KEYBOARD
1 MB
Video RAM
640 X 480
SVGA LCDINTERNAL LCD DISPLAY
Internal  
Glidepad
PMU/Keyboard
Controller
HDD
CD-ROM
SIMM Memory
Expansion 
Modules
RTC
82C602A
PCI Bus
PCI Bus
IR /Audi o
Board
Figure 4-1   Notebook Functional Block Diagram
   
4-2 
 Theory of Operation