Acer Travelmate 4070 Service Guide

36TravelMate 4070/4080
 
Efficiency  It should provide an efficiency of 83% minimum, when measured at maximum 
load under 115Vac.
Output Ratings (CV mode)
DC output voltage  19V
Noise + Ripple  300mVp-pmax (20 MHz bandwidth)
Load 0(min) 3.16A(max)
Output Ratings (CC mode)
DC output voltage 19V +/-1.0V for CV mode
Constant current mode 3.6 +/- 0.3A
Dynamic Output Characteristics
Turn-on delay time 3 sec (@ 115Vac)
Hold up time 5ms (@115Vac, Full load)
Over Voltage Protection (OVP) 24V
Short circuit...

Chapter 137
Environmental Requirements
ItemSpecification
Temperature
Operating
+0~+35 
°C
Non-operating
-20~+65 
°C
Package storage
-20~+65 
°C
Humidity
Operating 10% to 90% RH, non-condensing
Non-operating 10% to 90% RH, non-condensing (Unpacked)
Non-operating 10% to 90% RH, non-condensing (Storage package)
Vibration
Operating (unpacked) Operation vibration: 1.0G ,X,Y,Zaxis, 30 minutes/axis
Non-operating (unpacked) 5~27.1Hz: 0.6G
27.1~50Hz: 0.04mm (peak to peak)
50~500Hz: 2.0G
Non-operating (packed)...

Chapter 238
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 (when “Press  to enter Setup” message is prompted 
on the...

39Chapter 2
Navigating the BIOS Utility
There are six menu options: Info., Main, System Devices, Security, Boot, and Exit.
Follow these instructions:
TTo choose a menu, use the cursor left/right keys (zx).
TTo choose a parameter, use the cursor up/down keys ( wy).
TTo change the value of a parameter, press por q.
TA plus sign (+) indicates the item has sub-items. Press e to expand this item.
TPress ^ while you are in any of the menu options to go to the Exit menu.
TIn any menu, you can load default...

Chapter 240
Information
NOTE: The system information is subject to different models.
ParameterDescription
HDD Model Name This field shows the model name of HDD installed on primary IDE master.
HDD Serial Number This field displays the serial number of HDD installed on primary IDE master.
ATAPI Device This field displays the mofel name of devices installed on secondary IDE master. The hard 
disk drive or optical drive model name is automatically detected by the system.
System BIOS Version This field...

41Chapter 2
UUID Number This will be visible only when there is an internal LAN device present. UUID means 
Universally Unique ID, a method for computing object identifiers (OIDs). It uses the serial 
number in the local Ethernet card combined with the date and time to generate a 128 bit 
(16bytes) number. For Acer product, this field displays UUID number. A UUID string will be 
stored in the secured data area which is an alphanumeric string of maxium 16 bytes in 
length.
ParameterDescription 

Chapter 242
Main
The Main screen displays a summary of your computer hardware information, and also includes basic setup 
parameters. It allows the user to specify standard IBM PC AT system parameters.
NOTE: The screen above is for reference only. Actual values may differ.
PhoenixBIOS Setup Utility 
   Information      
Main      Security       Boot       Exit 
 
  
Item Specific Help 
System Time: [05:45:48] 
System Date: [08/30/2005] 
  
System Memory:  640 KB 
Extended Memory:  1040 MB 
Video Memory...

43Chapter 2
The table below describes the parameters in this screen. Settings in boldface are the default and suggested 
parameter settings.
NOTE: The sub-items under each device will not be shown if the device control is set to disable or auto. This is 
because the user is not allowed to control the settings in these cases.
ParameterDescriptionFormat/Option
System Time Sets the system time. The hours are displayed 
with 24-hour format.Format: HH:MM:SS 
(hour:minute:second) System Time
System Date Sets...

Chapter 244
Security
The Security screen contains parameters that help safeguard and protect your computer from unauthorized 
use.
PhoenixBIOS Setup Utility 
     Information       MainBoot
 
 
Item Specific Help 
Supervisor Password Is : 
User Password Is : Clear
Set Supervisor Password
Set User Password
Set HDD Password
  
Password on Boot[Disabled]
 
  
 
Supervisor Password 
controls accesses of the 
whole setup utility. 
It can be used to 
boot up when Password 
on boot is enabled. 
 
F1  Help...

45Chapter 2
The table below describes the parameters in this screen. Settings in boldface are the default and suggested 
parameter settings.
NOTE: When you are prompted to enter a password, you have three tries before the system halts. Don’t forget 
your password. If you forget your password, you may have to return your notebook computer to your 
dealer to reset it.
NOTE: The User Password can chagne the following items in BIOS: System Date, System Time and Power 
on Display on Main menu, System Devices...