Acer Travelmate 740 Service Guide

							Chapter 123
  
NOTE: DC-AC inverter is used to generate very high AC voltage, then support to LCD CCFT backlight user, 
and is also responsible for the control of LCD brightness.  Avoid touching the DC-AC inverter area while 
the system unit is turned on. 
NOTE: There is an EEPROM in the inverter, which stores its supported LCD type and ID code.  If you replace 
a new inverter or replace the LCD with a different brand, use Inverter ID utility to update the ID 
information.     DC-AC LCD Inverter
ItemSpecification
Vendor & model 
nameAmbit T621124.00 730
Input voltage (V) 7.3 (min.) - 21 (max.)
Input current (mA) - - 900 (max.)
Output voltage 
(Vrms, no load)-565 (typ.)-
Output voltage 
frequency (kHz)40 (min.) - 65 (max.)
Output Current/
LampIout(Min) 0.7mA 1.0mA 1.3mA Vadj=0V
Iout(Max) 6.3mA 7.0mA 7.7mA Vadj=3.2V
LCD
ItemSpecification
Vendor & model name Hitachi 
TX38D95VC1CAM
Mechanical Specifications
LCD display area (diagonal, inch) 15
Display technology TFT
Resolution SXGA+ (1400x1050)
Supports colors 262K
Optical Specification
Brightness control keyboard hotkey
Contrast control No
Electrical Specification
Supply voltage for LCD display (V) 3.3
Supply voltage for LCD backlight 
(Vrms)690
AC Adapter
ItemSpecification
Vendor & model name Delta ADT-60XB D 3P
Input Requirements
Maximum input current (A, 
@90Vac, full load)1.5 A    @   90Vac
0.9 A    @ 180Vac
Nominal frequency (Hz) 47 - 63
Frequency variation range (Hz) 47 - 63
Nominal voltages (Vrms) 90 - 270
Inrush  current The maximum inrush current will be less than 50A and 100A when the adapter 
is connected to 115Vac(60Hz) and 230Vac(50Hz) respectively. 
						

							24Chapter 1
 
Efficiency  It should provide an efficiency of 83% minimum, when measured at maximum 
load under 115V(60Hz).
Output Ratings (CV mode)
DC output voltage  +19.0V~20.0V
Noise + Ripple  300mvp-pmax (20MHz bandwidth)
Load  0 A (min.)       3.16 A (max.)
Output Ratings (CC mode)
DC output voltage +12V ~ +19V
Constant output 2.75 ± 0.2 A
Dynamic Output Characteristics
Turn-on delay time 2 sec. (@115Vac)
Hold up time 4 ms min. (@115 Vac input, full load)
Over Voltage Protection (OVP) 24 V
Short circuit protection Output can be shorted without damage
Electrostatic discharge (ESD) 15kV (at air discharge)
8kV (at contact discharge)
Dielectric Withstand Voltage
Primary to secondary 1500 Vac (or 2121 Vdc), 10 mA for 1 second
Leakage current  0.25 mA max. (@ 254 Vac, 60Hz)
Regulatory Requirements Internal filter meets:
1.  FCC class B requirements. (USA)
2.  VDE 243/1991 class B requirements. (German)
3.  CISPR 22 Class B requirements. (Scandinavia)
4.  VCCI class II requirements. (Japan)
Power Management 
Power Saving ModePhenomenon
Standby Mode
Waiting time specified by the System 
Standby value or the operating system 
elapses without any system activity.
Or
When the computer is about to enter 
Hibernation mode (e.g., during a battery-low 
condition), but the Hibernation file is invalid 
or not present.
!The Sleep indicator lights up
Hibernation Mode
When customized functions for power 
management are set to 
Hibernation and the 
corresponding action is taken.
!All power shuts off
Display Standby Mode
Keyboard, built-in touchpad, and an external 
PS/2 pointing device are idle for a specified 
period.
!The display shuts off
Hard Disk Standby Mode
Hard disk is idle within a specified period of 
time.
!Hard disk drive is in standby mode.
(spindle turned-off)
AC Adapter
ItemSpecification 
						

							Chapter 125
Environmental Requirements
ItemSpecification
Temperature
Operating
+5~+35 
°C
Non-operating
-20~+60 
°C
Non-operating
-20~+60
 °C  (storage package)
Humidity
Operating 20% to 80% RH, non-condensing
Non-operating 20% to 90% RH, non-condensing (unpacked)
Non-operating 20% to 90% RH, non-condensing (storage package)
Vibration
Operating (unpacked) 5~25.6Hz: 0.38mm (peak to peak)
25.6~250Hz: 0.5G
Non-operating (unpacked) 5~27.1Hz: 0.6G
27.1Hz~50Hz: 0.41mm (peak to peak)
50~500Hz: 2.0G
Non-operating (packed) 5~62.6Hz: 0.51mm (peak to peak)
62.6~500Hz: 4G
Mechanical Specification
ItemSpecification
Dimensions 324.5 (W) x 271 (D) x 36(H) 
Weight 7 lbs 
I/O Ports 2 type II or one type III CardBus socket(s), 1 RJ-11 modem port, 1 RJ-45 LAN port, 
1 DC-in jack(AC adapter), 1 FIR port, 1 parallel port, 1 serial port, 1 external 
monitor port, 1 PS/2 keyboard/mouse port, 1 mini docking station connector, 2 
USB ports, 1 speaker/headphone-out jack, 1 audio line-in jack, 1 microphone-in 
jack, 1 fingerprint recognition sensor
Drive Bays One
Material Housing:  MCS-050 
Panel    :  Plastic
Indicators Power LED, Sleep LED,  Media Activity, Battery Charge, Caps Lock, Num Lock
Switch Power
Memory Address Map
Memory AddressSizeFunction
00100000h-000F0000h 512 KB System BIOS
000F0000h-000CD000h UMB Area
000CD000h-000C0000h 40 KB VGA BIOS
000C0000h-000A0000h 128 KB Video memory (VRAM)
000A0000h-00000000h Conventional memory
I/O Address Map
I/O AddressFunction
000-00F DMA controller-1
020-021 Interrupt controller-1
040-043 Timer 1 
						

							26Chapter 1
060, 064 Keyboard controller 38859 chip select
061 System speaker out
040B DMA controller-1
061 System speaker
070-071 Real-time clock and NMI mask
080-08F DMA page register
0A0-0A1 Interrupt controller-2
0C0-0DF DMA controller-2
0F0-0FF Numeric data processor
120-13F
180-18FPower management controller
170-177 2nd EIDE device (CD-ROM) select
1F0-1F7 1st EIDE device (hard drive) select
220-22F Audio 
240-24F Audio (optional)
278-27F Parallel port 3
2E8-2EF COM4
2F8-2FF COM2 or FIR (optional)
378, 37A Parallel port 2
3BC-3BE Paraller port 1
3B0-3BB
3C0-3DFVideo Controller 
3F0h-3F7 Standard Floppy Disk Controller
3E8-3EF COM3 or LT Win modem (optional)
3F0-3F7 Floppy disk controller
3F8-3FF COM1 
480-48F, 4D6  DMA controller-1
4D0-4D1
CF8-CFFPCI configuration register
IRQ Assignment Map
Interrupt ChannelFunction
IRQ0 System timer
IRQ1 Keyboard
IRQ2 Cascade
IRQ3 IR
IRQ4 COM1 (Serial port)
IRQ5 Reserved for R2 card
IRQ6 Floppy
IRQ7 LPT (Parallel port)
IRQ8 CMOS/RTC
IRQ9 SCI IRQ used by ACPI bus
IRQ10 Audio (PIRQB#), Modem (PIRQB#), SMBUS controller (PIRQB#), IEEE 1394 
(PIRQ#), 802.11b (PIRQE#), LAN (PIRQTE#) 
IRQ11 VGA (PIRQA#), USB (PIRQA#, PIRQC#, INTD#), CardBus controller 
(PIRQB#, PIRQB#)
I/O Address Map
I/O AddressFunction 
						

							Chapter 127
IRQ12 PS/2 device
IRQ13 Math processor
IRQ14 1st EIDE device (hard disk) 
IRQ15 2nd EIDE device (CD-ROM drive)
DMA Channel Assignment
DMA ChannelFunction
DRQ0 Reserved
DRQ1 Reserved
DRQ2 Floppy
DRQ3 Reserved
DRQ4 DMA controller
DRQ5 Reserved
DRQ6 Reserved
DRQ7 Reserved
IRQ Assignment Map
Interrupt ChannelFunction 
						

							28Chapter 1 
						

							Chapter 229
BIOS Setup Utility
The BIOS Setup Utility is a hardware configuration program built into your computer’s BIOS (Basic Input/
Output System).
Your computer is already properly configured and optimized, and you do not need to run this utility.  However, 
if you encounter configuration problems, you may need to run Setup.  Please also refer to Chapter 4 
Troubleshooting when problem arises.
To activate the BIOS Utility, press 
m during POST (while the TravelMate logo is being displayed).
Navigating the BIOS Utility
There are six menu options:  System Information, Basic System Settings, Startup Configuration, Onboard 
Device Configuration, System Security and Loading Default Settings.
To enter a menu, highlight the item using the 
w / y keys, then press e.
Within a menu, navigate through the BIOS Utility by following these instructions:
!Press the w / y keys to move between the parameters.
!Press the z / x keys to change the value of a parameter.
!Press 
the | 
key while you are in any of the menu options to return to the main menu.
NOTE: 
You can change the value of a parameter if it is enclosed in square brackets.  Navigation keys are 
shown at the bottom of the screen.
BIOS Utility
System Information
Basic System Settings
Startup Configuration
Onboard Device Configuration
System Security
Loading Default Settings
↑↓ = Move highlight bar,   Enter = Select,  Esc = Exit
System Utilities
Chapter  2 
						

							30Chapter 2
System Information
The System Information screen displays a summary of your computer hardware information.
NOTE: 
The screen above is a sample and may not reflect the actual data on your computer.  “X” may refer to a 
series of numbers and/or characters.
The following table describes the information in this screen.
The items in this screen are important and vital information about your computer.  If you experience computer 
problems and need to contact technical support, this data helps our service personnel know more about your 
computer.
ParameterDescription
CPU Type & Speed Describes the type of CPU installed in the system.
Floppy Disk Drive Shows the floppy disk drive type (1.44 MB, 3.5-inch).
Hard Disk Drive Shows the size or capacity of the hard disk.
HDD Serial Number Shows the serial number of the hard disk.
System with Shows the high-capacity disc drive installed.
System BIOS Version Shows the system BIOS version. 
VGA BIOS Version Shows the video graphics accelerator BIOS version.
Serial Number Shows the serial number of the computer.
Asset Tag Number Shows the asset tag number of the computer.
Product Name Shows the official name of the product.
Manufacturer Name Shows the manufacturer of the computer.
UUID Shows the universally unique identifier of your computer.
                                     Page 1/1System Information
System InformationSystem Information System Information
CPU Type & Speed ------------------
Hard Disk Drive ----------------------
HDD Serial Number -----------------
System BIOS Version ---------------
VGA BIOS Version -------------------
Serial Number -----------------------
Asset Tag Number -------------------
Product Name -----------------------
Manufacturer Name -----------------
UUID ---------------------------------- Floppy Disk Drive --------------------
System with -------------------------- 
Esc = Exit
Pentium ® III 1133 MHz
1.44MB 3.5-inch
28615 MB
XXXXXXXXXX
DV
V3.3  R01-A2d1
VR005.000.006.000
XXXXXXXXXX
XXXXXXXXXX
TravelMate 740
Acer
XXXXXXXXXXD/CD-RW Attached  
						

							Chapter 231
Basic System Settings
The Basic System Settings screen allows you to set the system date and time.
The following table describes the parameters in this screen.
ParameterDescriptionFormat
Date Sets the system date. DDD MMM DD, YYYY 
(day-of-the-week month day, year)
Time Sets the system time. HH:MM:SS (hour:minute:second)
Basic System Settings
Basic System SettingsBasic System Settings Basic System Settings                                Page 1/1
Date -----------------------------------
Time -----------------------------------
↑↓ ←→ = Move highlight bar,   = Change setting, F1 = Help
[Mon Aug 28, 2001]
[20:39:33] 
						

							32Chapter 2
Startup Configuration
The Startup Configuration screen contains parameter values that define how your computer behaves on 
system startup.
The following table describes the parameters in this screen.  Settings in boldface
 are the default and 
suggested parameter settings.
Basic System Setting   
Basic System Setting   Basic System Setting    Basic System Setting                                     Page 1/1
Boot Display -------------------------------------
Screen Expansion -----------------------------
Resume on LAN/Modem Access 
LAN
CPU Power Management Mode 
Boot Drive Sequence:
     1st.  --------------------------------------------
     2nd. -------------------------------------------
     
     4rd. --------------------------------------------
     
Intel (R) SpeedStep(TM) Technology------------------
 ------------------------------------
--------
3rd. -------------------------------------------- Fast Boot ----------------------------------------
Boot on 
↑↓ ←→ = Move highlight bar,   = Change setting, F1 = Help
[Both]
[Enabled]
[Enabled ]
[Disabled ]
[Floppy Disk]
[CD-ROM]
[Hard Disk]
[----------------]
[Automatic] [Disabled ]
[Auto ]