Acer Extensa 390 Service Guide

							System Introduction1-29 The following processes are the basic methods used to implement the LCD brightness AutoDim.
1. If the original brightness is over 75% and the AC power is on-line, the BIOS will change the
brightness to 75% after the AC power is off-line.
2. If the original brightness is below 75%, the brightness maintains the same level even if the AC
power is off-line.
3. If the brightness is already changed by the hotkey under DC power, it will not be changed after
the AC power is plugged in.
4. If the brightness is not changed by the hotkey under DC power, the brightness will be changed
back to the old setting — the previous brightness parameter under AC power.
5. If the previous brightness parameter does not exist, the brightness will not be changed in
process 4.
1.5.2 Drivers, Applications and Utilities
The notebook comes preloaded with the following software:
· Windows 953
· System utilities and application software4
· Sleep Manager utility
· Display drivers
· Audio drivers
· PC Card slot drivers and applications
· Other third-party application software
Table 1-36Location of Drivers in the System Utility CDDevice CategoryFunctionLocationSound, video and game controllersAudioENGLISH\WIN95\AUDIO\MouseMouseENGLISH\WIN95\MOUSE\Display adaptersVideoENGLISH\WIN95\VGA\PCMCIAZoomed Video PortEnglish\Win95\PCMCIA\                                                  3
In some areas, a different operating system may be pre-loaded instead of Windows 95.
4
The system utilities and application software list may vary. 
						

							1-30Service GuideTo re-install applications under Windows 95, click on Start, then Run….  Based on the location of
the application, run the setup program to install the application.  The following table lists the
applications and their locations:
Table 1-37Location of Applications in the System Utility CDNameFunctionLocationSleep Manager0V Suspend utilityENGLISH\WIN95\SLEEPMGR\Y-StationAudio applicationENGLISH\WIN95\YstationSafeOFFProtect if user accidentally press the power switchENGLISH\WIN95\SAFEOFFDrivers for Windows 3.x and Windows NT are also found in the System Utility CD if you should
need them. 
						

							System Introduction1-31 1.6 Block Diagrams
1.6.1 SystemAUD BDConn.
Serial Port
CPU P55C
PCI BusPCI Bus
ISA BusISA BusCPU BusCPU Bus
Tag RamCache
 
DIMM2 Socket
ALIM1531
VGAC&T65555
ALIM1533
CD-ROM& HDDDConn.
AUD BDConn.
USBConn.Super I/O
SMC
FDC 37C672
BatteryConn.
ChargerConn.
BIOSROM
PCMCIA
TI 
PCI1250A
AUDIOYMF715
DIMM1 Socket
KBCM38813
SMB Bus
FIRcontrol
InternalFDD Conn.
AMPLM4836Figure 1-12System Block Diagram 
						

							1-32Service Guide1.6.2 ClockCLK GEN
CY2272
SMB BUS
M1533
DIMM1
DIMM2
CPU CLK
M1531CACHECPU
SGRAM CLK
DIMM1DIMM2
PCI CLK14.318M48MHZ
1531153365555PCI1250
USB
153365555YMF71537C672MODEM
38813
72Figure 1-13Clock Block Diagram 
						

							System Introduction1-33 1.7 Environmental Requirements
Table 1- 38Environmental RequirementsItemSpecificationTemperatureOperating (ºC)+5~ +35Non-operating(ºC)-20 ~ +60HumidityOperating (non-condensing)20% ~ 80%Non-operating (non-condensing)20% ~ 80%Operating Vibration (unpacked)Operating5 - 25.6Hz, 0.38mm;  25.6 - 250Hz, 0.5GSweep rate0.5 octave / minuteNumber of test cycles2 / axis (X,Y,Z)Non-operating Vibration (unpacked)Non-operating5 - 27.1Hz, 0.6G;  27.1 - 50Hz, 0.41mm; 50-500Hz, 2GSweep rate0.5 octave / minuteNumber of text cycles4 / axis (X,Y,Z)Non-operating Vibration (packed)Non-operating5 - 62.6Hz, 0.51mm; 62.6-500Hz, 4GSweep rate0.5 octave / minuteNumber of text cycles4 / axis (X,Y,Z)ShockOperating5G peak, 11±1ms, half-sineNon-operating (unpacked)40G peak, 11±1ms, half-sineNon-operating (packed)50G peak, 11±1ms, half-sineAltitudeOperating
10,000 feet (5°C ~ 40°C)Non-operating
40,000 feet (-10°C ~ 60°C)ESDAir discharge8kV (no error)
12.5kV (no restart error)
15kV (no damage)Contact discharge4kV (no error)
6kV (no restart error)
8kV (no damage) 
						

							1-34Service Guide1.8 Mechanical Specifications
Table 1-39Mechanical SpecificationsItemSpecificationWeight
  FDD model
  CD-ROM model(includes battery)
2.77 kg. (6.11 lb.)
2.8 kg.   (6.2 lb.)Dimensions
(main footprint)W x D x H
311.5mm x 236/246mm x 46.5mm  (12.26” x 9.29”/9.69” x 1.83”) 
						

							C  h  a  p  t  e  r        2 C  h  a  p  t  e  r        2
Major Chips DescriptionMajor Chips Description2-1This chapter discusses the major chips used in the notebook.
Table 2-1Major Chips ListComponentVendorDescriptionPCI 1250ATIPC Card controller chipAladdin IV (M1531/M1533)ALiSystem Architecture chipsetFDC37C672SMCSuper I/O controller chip65555C&TVideo controller chipM38813Keyboard controller chipYMF715B-SYamahaAudio chip 
						

							2-2Service Guide2.1 PCI 1250A
The Texas Instruments PCI1250A is a high-performance PC Card controller with a 32-bit PCI
interface. The device supports two independent PC Card sockets compliant with the 1995 PC Card
Standard. The PCI1250A provides a rich featured set which make it the best choice for bridging
between PCI and PC Cards in both notebook and desktop computers. The 1995 PC Card Standard
retains the 16-bit PC Card specification defined in PCMCIA Release 2.1, and defines the new
32-bit PC Card, CardBus, capable of full 32-bit data transfers at 33 MHz. The PCI1250A supports
any combination of 16-bit and CardBus PC Cards in the two sockets, powered at 5V or 3.3V as
required.
The PCI1250A is compliant with the PCI Local Bus Specification Revision 2.1, and its PCI
interface can act as either a PCI master device or a PCI slave device. The PCI bus mastering is
initiated during 16-bit PC Card DMA transfers, or CardBus PC Card bridging transactions.
All card signals are internally buffered to allow hot insertion and removal without external
buffering. The PCI1250A is register compatible with the Intel 82365SL-DF ExCA controller. The
PCI1250A internal data-path logic allows the host to access 8-, 16-, and 32-bit cards using full
32-bit PCI cycles for maximum performance. Independent buffering and a pipeline architecture
provide an unsurpassed performance level with sustained bursting. The PCI 1250A can also be
programmed to accept fast posted writes to improve system-bus utilization.
The PCl1250A provides an internally buffered zoom video path. This reduces the design effort of
PC board manufacturers to add a ZV compatible solution and guarantees compliance with the
CardBus loading specifications. Multiple system interrupt signaling options are provided including:
parallel PCI, parallel ISA, serialized ISA, and serialized PCI. Furthermore, general purpose inputs
and outputs are provided for the board designer to implement sideband functions. Many other
features are designed into the PCI1250A such as socket activity LED outputs, and are discussed in
detail throughout the design specification.
An advanced CMOS process is used to achieve low system power consumption while operating at
PCI clock rates up to 33MHz. Several low-power modes allow the host power management system
to further reduce power consumption.
2.1.1 Features
· PCI Power Management Compliant
· ACPI 1.0 Compliant
· Packaged in a 256-pin BGA
· PCI Local Bus Specification Rev. 2.1 Compliant
· 1995 PC Card Standard Compliant
· 3.3 Volt Core Logic with Universal PCI Interfaces Compatible with 3.3 Volt and 5 Volt PCI
Signaling Environments
· Mix and Match 5V/3.3V PC Card16 Cards and 3.3V CardBus Cards
· Supports Two PC Cardä or CardBus Slots with Hot Insertion and Removal
· Uses Serial Interface to TI TPS2206A Dual Power Switch 
						

							Major Chips Description2-3 · Supports Burst Transfers to Maximize Data Throughput on both PCI Buses
· Supports Serialized IRQ with PCI Interrupts
· 8-Way Legacy IRQ Multiplexing
· System Interrupts can be Programmed as PCI-style or ISA IRQ-style
· ISA IRQ interrupts can be Serialized onto a single IRQSER pin
· EEPROM Interface for Loading Subsystem ID andSubsystem Vendor ID
· Pipelined Architecture allows Greater than 130 Mbytes per second throughput  from CardBus
to PCI and from PCI to CardBus
· Supports Zoom Video with Internal Buffering
· Programmable Output Select for CLKRUN
· Four General Purpose I/Os
· Multi-function PCI Device with Separate Configuration Space for each Socket
· Five PCI Memory Windows and Two l/O Windows Available to each PC Card16 Socket
· Two I/O Windows and Two Memory Windows Available to each CardBus Socket
· ExCAä-Compatible Registers are Mapped in Memory and I/O Space
· Supports Distributed DMA and PC/PCI DMA
· Intelä- 82365SL-DF Register Compatible
· Support 16-bit DMA on both PC Card Sockets
· Supports Ring indicate, SUSPEND, and PCI CLKRUN· Advanced Submicron, Low-Power CMOS Technology
· Provides VGA / Palette Memory and I/O, and Subtractive Decoding Options
· LED Activity Pins
· Supports PCI Bus Lock 
						

							2-4Service Guide2.1.2 Block Diagram
A simplified block diagram of the PCI1250 is provided in following figure. The PCI interface
includes all address/data and control signals for PCI protocol. The interrupt interface includes
terminals for parallel PCI, parallel ISA, and serialized PCI & ISA signaling. The ring indicate
terminal is included in the interrupt interface, since its function is to perform system wake-up on
incoming PC Card modem rings. Miscellaneous system interface terminals include GPIO signals,
PC/PCI DMA support signals, and socket activity LED signals.Figure 2-1PCI1250 Block Diagram