Acer Extensa 570 Mantenance Manual

							·Try rebooting the system (Ctrl-Alt-Del
); restore system from diskettes, if
necessary.
·If the computer is capable of running the Setup program; check the
serial and parallel port configurations, and other features that may
affect system operation.
·Run Diagnostics to further isolate problem area (refer to Paragraph
5.3.5).
·For indicated hardware failures, cycle power and repeat self test to
verify that a hard failure has occurred.
·Remove and replace suspect hardware (as described in Section 6 of this
manual) and retest the system using the diagnostic tests as described in
Paragraph 5.3.5.
The detailed block diagram, shown in Figure 5-2, is useful in performing
fault analysis of various internal subsystems. For example, an LCD
hardware problem can be traced to either the LCD, Inverter Board, or Power
Supply Board. Other subsystem problems can be isolated in a similar
fashion using the detailed block diagram as a troubleshooting tool.
5.3Troubleshooting Procedures
The built-in self test program and the disk resident diagnostics program
(PC-Doctor) are useful tools in computer troubleshooting. However, if the
computer has a power, keyboard or display problem, you first solve this
problem before running diagnostics. If the computer powers up and displays
messages on the LCD or emits a series of beeps, skip to Paragraph 5.3.3 for
further instructions.
5.3.1Troubleshooting a Power Supply Problem
If the computer does not power up when the Power Switch is set to the ON
position, you most likely have a malfunction in the power subsystem (loss of
power at the AC Outlet, faulty AC Adapter, discharged Battery Pack, or
faulty Power Supply Board). With a power problem, the status screen and
the LCD are both blank, and no drive activity can be heard. The computer is
unable to load software and displays no visible signs of activity.
To fault isolate a power problem, check the following:
·AC Adapter and Battery- Plug in the AC adapter and double check all
connections on the adapter and computer. Ensure that the notebook
Power
 button is set to the On position and that the system is not in
standby or sleep modes.
·Measure the voltage at the AC outlet or plug in a known good appliance
(e.g. a lamp) to verify that voltage is present. If the voltage is okay, try
replacing the AC adapter.
  
Troubleshooting Procedures 5-3 
						

							·Check to see that the battery pack is installed correctly (try using a
recharged battery pack if  battery is discharged)
·If the AC outlet voltage, AC Adapter, and battery packs test normal but
the computer will not power up, replace the Power Supply Board and/or
Battery Board as described in Section 6.
 
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 5-2   Troubleshooting Block Diagram
   
5-4 
Troubleshooting Procedures 
						

							5.3.2Troubleshooting a Display Problem
If the LCD remains blank when you turn on the computer, and the status
ICONs light on the Status display panel above the keyboard, check the
following controls on the display:
·LCD standby mode - If the LCD backlight remains off, even with the
Contrast Control set to its highest position, the LCD may be in Standby
Mode
. Press the Power
 button to power up the system.
·Notebook Set for External Monitor - use CMOS Setup to reset notebook.
·LCD - Replace the cover-display assembly as described in Section 6 of
this manual.
·Low battery - Use a fully charged battery.
5.3.3Fault Isolation Using Self Test
When the computer is first powered up, it automatically performs a self test
of its central hardware and memory functions. During self test (which lasts
for a few seconds), the display shows copyright and version number
information.
n
Note: 
 Some procedures in this paragraph require you to use keystroke se-
quences, such as Ctrl-Alt-Del
. To execute a keystroke sequence such as
this, you must press all three keys simultaneously.
5.3.3.1 Self Test Error Messages
Upon successful completion of the self test, the computer automatically
loads its operating system and other built-in utilities. If the self test fails to
complete successfully, the display shows one of the error messages
described in Appendix A.
5.3.4PCMCIA Modem Problems
If an optional PCMCIA modem does not work properly, check the following
items:
·Proper installation of any PCMCIA options (check Modem settings under
Control Panel).
·Dialing problem or wrong number - Try dialing a number that you have
previously dialed successfully.
  
Troubleshooting Procedures 5-5 
						

							·Faulty phone line - Connect a telephone to the line and listen for a dial
tone.
·Software program - Check to ensure that you have installed the
software correctly.
·I/O Address Conflict - The multimedia sound capability of the Extensa
uses I/O address 220. However, this may conflict with some third-party
PCMCIA cards like the IBM Token Ring card. In this case, reset the
Extensa multimedia sound to I/O address 240 as shown in Figure 5-3.
5.3.5Fault Isolation Using Diagnostics
PC-Doctor supplied with the Extensa Series Notebooks is a powerful
diagnostics tool that can help you scan an internal RAM system for viruses,
determine the hardware configuration of a local or remote system,
benchmark its performance, analyze the performance of all subsystems,
and perform a suite of  interactive and non-interactive tests on attached
devices. The test results are stored in a log which can be printed out (by
pressing F2
) or saved in a disk file (by pressing F3
).
Features of the diagnostic program are accessed through a series of
pull-down menus and basic keyboard keys (cursor keys to move highlighted
pointer, Enter key to select a highlighted feature, Esc key to cancel a
function and move back one level. PC-Doctor is typically user friendly but if
you don’t understand a feature, context-sensitive help information is
available at any time by pressing the F1
 function key; pressing the F1
function key twice accesses the online Technical Reference Manual for
PC-Doctor. 
A powerful set of utilities within PC-Doctor (that can be run locally or
remotely) simplify the task of determining system configuration data,
I/O Address 220
(Both switches in
lower position)I/O Address 240
(Both switches in
upper position)
NOTE: Lift keyboard to access IR/Sound Board
           DIP Switch 
Figure 5-3   I/O Address Setting (IR/Sound Board)
   
5-6 
Troubleshooting Procedures 
						

							allocating and using system memory, IRQ and DMA use, what device drivers
are installed, what COM and LPT ports are assigned and what ports are
available, identifying partitioning data for fixed disk drive(s), determining
the SVGA setup information, reading the software interrupts/interrupt
vectors, etc.
Functionally, PC-Doctor includes the following: 
·Group of nine non-interactive diagnostic tests that perform a
non-destructive test of the major hardware functions in the notebook
(Processor, Memory, System board, video section, serial and parallel
ports (when loopback adapters are installed), hard disk and floppy disk.
·Group of seven interactive tests (require operator input) for testing the
keyboard, video sections, sound subsystem, mouse, joystick, diskette
drive, printer subsystem and SCSI/CD-ROM Drive subsystems.
·Utility that provides detailed system information such as configuration
data, allocation and use of system memory, IRQ and DMA use, what
device drivers are installed, what COM and LPT ports are assigned and
what ports are available, partitioning data for fixed disk drive(s), SVGA
setup information, software interrupts and interrupt vectors.
·Group of special purpose utilities to run other tests from PC-Doctor,
perform a virus scan of the internal RAM system, edit configuration
files, surface scan hard drives, measure system performance, open a
DOS prompt, provides terminal access to devices connected to serial
ports, supports memory debug operations, enables remote operations,
permits deep discharge of notebook batteries and provides an extensive
test reporting function.
The PC-Doctor diagnostic program contains a group of nine non-Interactive
diagnostics, available from the Diagnostics
 heading in the main menu, that
permits testing various hardware sections without operator input. You can
select one, several, or all tests from the Diagnostics menu. These tests are
non-destructive; the serial and parallel port tests require disconnecting
external devices from your notebook and installing loopback plugs. The
Non-Interactive test categories include: 
·
CPU and Coprocessor tests
·
Base RAM memory test
·
System Board test
·
Video Test
·
COM1 and LPT1 serial port tests
·
Parallel Port Test
·
Fixed Disk test
·
Diskette Drive tests
  
Troubleshooting Procedures 5-7 
						

							·Other devices (Sound card, PCMCIA options, etc.)
Interactive Tests
The PC-Doctor diagnostic test includes a suite of seven Interactive tests that
require operator input during the course of the test. The Interactive Tests
category includes:
·Keyboard
 - tests the keyboard keys, LEDs and repeat
function
·Video 
- tests the LCD and external SVGA character sets, and
colors.
·Speaker
- tests the volume response at different frequencies.
·Mouse 
- tests the mouse driver, buttons and functionality
·Joystick 
- calibrates the external joystick connected to the
system and tests the joystick buttons
·Diskette Drive 
- checks diskette drive functionality
·Maximum System Load 
- thoroughly exercises system to the
maximum extent possible for performing system burn-in and
test
·Printer Test
 - tests the operation of a connected printer
·SCSI Test 
- sends test codes to attached SCSI devices
(requires use of a Docking System with SCSI)
·CD-ROM Test 
- checks out any attached CD-ROM Drive
(requires attachment of a Docking System with CD-ROM
capability)
Supporting Online documentation 
The PC-Doctor Diagnostic contains the following online information sources: 
·Online Technical Manual - selected at any time by pressing F1
 key
twice or by clicking on the Question Mark in the upper left hand corner
of any PC-Doctor Menu
·On-line Help system that provides context sensitive information from
every PC-Doctor screen - accessed by pressing F1
 key once (pressing F1
twice gets you into the online manual)
   
5-8 
Troubleshooting Procedures 
						

							5.3.5.1  User Interface to PC-Doctor
PC-Doctor is structured as a text mode, window user interface with
pull-down menus. Program operation requires the use of the following keys:
·Cursor Keys - move the highlighted pointer
·Enter Key - Selects the highlighted option
·Esc Key - Cancels current function and goes back one step
·F1 Key - Activates the context-sensitive help feature (pressing F1
 twice
in a row calls up the online Technical Reference Manual for PC-Doctor)
Scrolling windows, which show the results of various operations, use the
following keys:
·Page Up/Page Down - moves the screen one page at a time
·F2 - Prints the log to PRN
·F3 - saves the log to a file
You can also use the mouse or glidepad to interact with PC-Doctor. The
leftmost Select
 key is used to choose objects (menu entries and action
codes typically enclosed in brackets). The rightmost Select
 key is equivalent
to the Esc
 key which takes you back to your previous step.
5.3.5.2 Creating a Bootable Floppy Diskette
Prior to using PC-Doctor, create a bootable floppy diskette using the
following procedure:
1.     Power up the unit; when unit displays message, Starting 
Windows 95, press F8
. Choose Command Prompt Only
 from menu.
2.
       Using DOS, format a floppy diskette.
3.     From the A:
 prompt, copy the basic MS-DOS files to the diskette using
the following command:
Format A: /F:1440 /S
Where the value 1440 is the capacity of the diskette (1.44 MB in this
example). 
4.     Get into the PC-Doctor directory ( type CD C:\PCDR 
and press Enter
).
5. 
      Copy the PC-Doctor files to the bootable diskette using the following
command:
 XCOPY C:. A:
After completion of this procedure, you should have a bootable diskette
containing PC-Doctor.
  
Troubleshooting Procedures 5-9 
						

							5.3.5.3  Running PC-Doctor
PC-Doctor is a DOS-resident program that can be run from either hard disk
or from the bootable diskette you previously created.
1
. From the C:\ prompt change directory (type CD C:\PCDR
) and press
Enter
.
2
.       The Diagnostics Program loads into system memory, and the LCD
displays the diagnostics Header.
n
Note: 
 There are a number of command-line switches that can be entered
when starting up PC-Doctor to enable automatic virus scanning, enable
loopback testing of serial/parallel ports, work from the remote menu if per-
forming remote operations, etc. To get a listing of the available command-
line switches, startup PC-Doctor with the following command: PCDR /? 
and
press Enter
.
n
Note: 
 If PC-Doctor detects a virus, it will stop with an error message. You
must then use one of the standard virus detection and removal programs to
remove the virus.
5.3.5.4  Quitting PC-Doctor
To exit PC-Doctor, select the Quit
 pull down menu and then select the Quit
to DOS
 option.
n
Note: 
 For additional information, press F1 
twice 
to access the online Refer-
ence manual for PC-Doctor. 
   
5-10 
Troubleshooting Procedures 
						

							6
Field Service
6.1Introduction
This section contains preventive and corrective maintenance procedures for
the Extensa 57x Series Notebook Computers. The first part of the section
describes the computer cleaning procedures and preferred handling
procedures for sensitive components (e.g. disk drives, batteries).
The second part of the section identifies all field-replaceable parts; the
remainder of the section contains removal and replacement procedures for
the field-replaceable parts.
6.2Preventive Maintenance
Preventive maintenance is limited to cleaning the plastic case, the keyboard,
and the display screen.
6.2.1Cleaning the Computer
When it is necessary to clean the plastic case, glidepad and keyboard, use a
soft, lint-free cloth, slightly dampened with a mild detergent solution or use
the contents of any commercially available computer cleaning kit.
c
Caution: Never use alcohol, petroleum-based solvents, or harsh deter-
gents to clean your computer. Also never spray any liquids directly on
the computer case, keyboard, or screen. If the liquid-crystal display
(LCD) screen has become smeared or dusty, clean the screen by first ap-
plying a mild glass cleaner to a soft, clean, lint-free cloth, and gently
wipe the glass. Never apply liquids directly on the screen surface.
cCaution: Do not use paper towels to clean the display screen. Paper can
scratch the display screen matte.
6.2.2Protecting the Disk Drives
To protect the disk drives and data, back up the system disk periodically on
floppy diskettes. Periodically use a head-cleaning diskette in the floppy
diskette drive to prolong the life of the drive and to help maintain data
integrity.
Field Service   6-1   
						

							6.2.3Handling the Computer Battery Pack
The battery pack furnished with the computer requires reasonable care and
handling to ensure efficient operation and maximum life. Periodically
inspect the battery terminals and the batteries for evidence of corrosion and
oxide build-up; clean if necessary.
To ensure that the battery pack endures a normal life cycle, always observe
the following precautions when handling the battery pack:
·Do not drop the battery pack or subject it to excessive shock and
vibration.
·Do not expose the battery pack to direct sunlight, moisture, or chemical
compounds.
·Do not disassemble the battery pack.
·Do not use the battery pack to power other devices.
·Do not short the battery leads or connect the battery with reversed
polarity.
·Never attempt to charge the battery pack in any way other than as
described in this manual.
·Always charge the battery pack as soon as possible after a low battery
indication. 
6.2.4Restoring System Software
The hard drive on the notebook computer is factory loaded with Windows 95
and ready for operation. Supplied with the Windows 95 system is a facility
for creating backup diskettes of the system software. In the event of a disk
crash or other problem, you can use the Windows 95 Startup diskette to
boot the unit and perform troubleshooting.
6.3Required Tools and Equipment
All notebook computer corrective maintenance procedures can be performed
using the following tools:
· Tweezers
· Small flat-blade screwdriver
· Small Phillips screwdriver
· Hexagonal Screwdriver
· Plastic Stick
 
6-2 
   Field Service