Acer Extensa 570 Mantenance Manual

 Table 4-1   Extensa Series I/O Address Map
Address Range Device
000-00F DMA Controller 1
020-021 Interrupt Controller 1
022-023 M1429 Registers
040-043 T imer 1
060-06E Keyboard Controller 8742 Chip Select
070-071 Real T ime Clock and NMI Mask
080-08F DMA Page Register
0A0-0A1 Interrupt Controller 2
0C0-0DF DMA Controller 2
1F0-1F7 Hard Disk Select
178, 17A 6377 Registers
1F0-1F7 Hard Disk Select
3F6, 3F7
278-27F Parallel Port 3
35F, 36F Special I/O Ports
378, 37A Parallel Port 2
3BC-3BE Parallel Port...

Table 4-2  DMA Channels
Controller Channel Address Function
1 0 0087 Spare
1 1 0083 Spare
1 2 0081 Diskette
1 3 0082 Spare
2 4 Cascade Cascade
2 5 008B Spare
2 6 0089 Spare
2 7 008A Spare
Table 4-3  IRQ Interrupt Levels
Priority Interrupt
NumberInterrupt Source
1 SMI Power management unit
2 NMI Parity Error Detected, I/O Channel Error
3 IRQ0 Interval Timer, Counter 0 Output
4 IRQ1 Keyboard
IRQ 2 Interrupt from controller 2 (cascade)
5 IRQ8 Real Time Clock
6 IRQ 9 Cascaded to INT 0AH (IRQ 2)
7 IRQ10...

Priority Interrupt
NumberInterrupt Source
17 IRQ7 Parallel Port
n
Note:
 A PCMCIA card can use IRQ 3, 4, 5, 7, 9 and 11 as long as it does not
conflict with the interrupt address of any other device.
4.2.2 I/O Subsystem
The I/O subsystem, implemented with an SMC37C655IR Super I/O
Controller Chip, provides for such functions as internal floppy drive control,
serial and parallel ports and support for the Serial Infrared port. The Super
I/O Controller includes the following features:
·100 percent compatible...

·Auto power -down and wake-up modes
·Typical current consumption during power -down is less than
10A
4.2.3 Video Subsystem
The video subsystem, implemented on the Main Board and on the LCD
Display Unit, displays text, graphics and drives an external SVGA port. The
video subsystem is implemented with a CirrusÔ Logic CL-GD 7543 high
performance VGA controller and supporting logic and video RAM (1 MB).
The major features of the VGA controller include:
·Highly integrated design (flat panel / CRT VGA...

c
Caution: Formatting the disk drive erases any data that may be stored
on the disk. Therefore do not attempt a format of the hard disk unless
the computer self test and diagnostics confirm that the disk has not
been formatted.
A Hard Drive activity ICON is located on the Status LED beneath the
Display Assembly. This ICON is visible during hard driver read/write
accesses.
cCaution:  The notebook should not be moved when the HDD ICON is lit
to prevent accidental damage to the hard drive. 
4.2.5Floppy...

· Two I/O windows per socket
· Programmable card access cycle timing
· 8- or 16-bit CPU interface
· 8- or 16-bit PCMCIA interface support
· ATA disk interface support
· Automatic flash memory timing support
· Easy host interface using ISA I/O addresses 03E0h, 03E1h
· Mixed-voltage (3.3V or 5V) operation
· Dual-socket-interface, 208-pin QFP
4.2.8Sound Subsystem (Model Dependent)
Some models of the Extensa 57x Series notebooks are equipped with a
16-bit stereo sound system including:
·Built-in microphone...

The power management modes and warnings include the following:
·LCD standby mode
·Hard disk/CD-ROM standby mode
·System standby/suspend mode
·Battery-low warning
·Standby/suspend upon battery low
4.2.9.2 AC Adapter
The notebook uses an AC adapter with built in over voltage and short circuit
protection.
The adapter can with stand a continuous short-circuit to DC output without
damage to the notebook logic components and resets to the normal power
mode after the fault condition is removed.
4.2.9.3 Primary...

4.2.9.4 DC-DC Converter/Battery Charger Circuit
The power supply board includes two DC-DC Converter circuits and a
battery charging circuit that operate the notebook and charge the internal
batteries when the AC Adapter is attached to the notebook. The converters
operate from an input voltage between 7 VDC and 20 VDC (from the AC
adapter) and generate the regulated voltages required to power all internal
logic circuits and charge the internal batteries. When the AC adapter is not
used, the DC-DC...

5
Troubleshooting Procedures
5.1General
This section provides the following information:
·Overview of the fault isolation process
·Guidelines for isolating computer malfunctions to replaceable
subassemblies 
·Instructions for executing diagnostics and interpreting error messages. 
5.2Overview of Fault Isolation Process
The fault isolation process (summarized in Figure 5-1) consists of the
following:
·Quick Check of the following:
·
Notebook power system (including battery packs and AC
Adapter...

START
COMPUTER
TROUBLE
INDICATION
?
DE AD
COM PUTER
SYMPTOMS
?
RUN
SELF TEST
ERROR
MESSAGE
?
MODEM
PROBLEM
?
RUN
DIAG NOSTI CS
DIAG NOSTI CS
E RROR MS G
?
NO
YES
NOYES
SEE PARAGRAPH
5.3.4
NO
YE SSEE PARAGRAPH
5.3.3
NO
SEE
PARAGRAPHS
5.3. 1 &  5.3. 2 NO
YES
YES
See Appendix B
(PC-Doctor)
When Power button 
is pressed, no indication
of power is present (dark
LCD, no Status icons lit, 
no disk drive activity, etc.)
Press Power button; 
Selftest automatically
runs when power turned on.
Figure 5-1...