Acer Travelmate 720 Service Guide

Chapter 1 23
Pack capacity (mAH) 3200
Cell voltage (V) 3.7
Number of battery call 8
Package configuration 2P-4S
Package voltage (V) 14.8V
Charger
ItemSpecification
Vendor & model name T62.085.C.00
Input voltage (from adapter, V) 7V-24V
Output current (to DC/DC converter, A) 3.5
Battery Low Voltage Li-ion
Battery Low 1 level (V) 11.41V
Battery Lower 2 level (V) 10.94V
Battery Low 3 level (V) 9.9V
Charge Current
Backgound charge (charge even system is still 
operative)Constant power 30W
Normal charge...

24 System Specifications
DC-AC inverter is used to generate very high AC voltage, to support the LCD 
CCFT backlight user, and it is also responsible for the control of LCD 
brightness. Avoid touching the DC-AC inverter area while the system unit is 
turned on.
OCP (Over Current 
Protection, A)4~6 4~6 0.3~0.
4--
DC-AC Inverter
ItemSpecification
Vendor & model 
nameAmbit T62.086.C(12.1”) T622.087.C.00 (13.3” &14.1”)
Input voltage (V) 7.3 (min) - 22 (max)
Input current 
(mA)- - 700 (max)
Output voltage...

Chapter 1 25
Brightness control Keyboard hotkey Keyboard hotkey
Contrast control None None
Electrical Specification
Supply voltage for LCD display 
(V)3.3 (typ) 3.3 (typ)
Supply voltage for LCD 
backlight (Vrms)730 (typ) 650 (typ)
AC Adapter
ItemSpecification
Vendor & model name Delta ADP-60HB
Lite-On PA-1600-19
Input Requirements
nominal voltages 
(Vrms)90~270
Frequency variation 
range (Hz)47~63
Maximum input current 
(A, @90Vac, full load)1.5A
Inrush current The maximum inrush current will be less...

26 System Specifications
Weights and Dimension
Electrostatic discharge 
(ESD, kV)+-15 (at air discharge)
Dielectric withstand voltage
Primary to secondary 3000 Vac (or 4242 Vdc), 10mA for 1 second
Leakage current 0.25 mA maximum @ 254 Vac, 60Hz
Regulatory Requirements
Internal filter meets:
FCC class B requirements. (USA)
VDE 243/1991 class B requirements. (German)
CISPR 22 Class B requirements. (Scandinavia)
VCCI class II requirements. (Japan)
ItemSpecification
Weight 3.27 kg. 
Dimension 315~317 x 251~...

Chapter 1 27
Power Management
This computer has a built-in power management unit that monitors system 
activity. System activity refers to any activity involving one or more of the 
following devices: keyboard, mouse, drive, hard disk, peripherals connected 
to the serial and parallel ports, and video memory. If no activity is detected for 
a period of time (called an inactivity time-out), the computer stops some or all 
of these devices in order to conserve energy.
This computer employs a power...

28 System Specifications
Standby Mode
The computer consumes very low power in Standby mode. Data remain 
intact in the system memory until the battery is drained.
There are four ways to enter Standby mode:
TPressing the Standby hot key Fn-F3
TAllowing the waiting time specified by the Standby Time-out value or the 
operating system to elapse without any system activity
TClosing the display cover
TWhen the computer is about to enter Hibernation mode (e.g., during a 
battery low condition), but the...

Chapter 1 29
Hibernation Mode
In Hibernation mode, all power shuts off (the computer does not consume 
any power). The computer saves all system information onto the hard disk 
before it enters Hibernation mode. Once you turn on the power, the computer 
restores this information and resumes where you left off upon leaving 
Hibernation mode.
There is one necessary condition for the computer to enter Hibernation 
mode:
TThe Hibernation file created by PhDISK must be present and valid.
In this situation,...

30 System Specifications
Advanced Power Management
This computer supports the APM standard designed to further reduce power 
consumption. APM is a power-management approach defined jointly by 
Microsoft and Intel. An increasing number of software packages support APM 
to take advantage of its power-saving features and to allow greater system 
availability without degrading performance.
For more information about APM under Windows 98, refer to your Windows 
98 user’s manual.
Advanced Configuration and...

Chapter 2 31
The computer comes preloaded with the following softwares:
TWindows 98 or Windows NT operating system
THardware BIOS setup utility
TSupport for LDCM (LANDesk Client Manager)
TSystem utilities, drivers and application software
Note: To access Windows 98 or Windows NT software applications, 
click on the Start button and select the application folder. Then 
click on the application icon to run the selected application. To 
learn about the software and utility, make use of the on-line help...

32 System Utilities
PhDISK
The PhDISK utility allows your computer to enter Hibernation mode. Before 
entering Hibernation mode, your computer saves all necessary information 
into a file or partition created by PhDISK, then shuts off power to all system 
components. On the next start-up, the computer reloads the information from 
the PhDISK file or partition and resumes from where you left off.
Note: 
By default, this utility program is automatically loaded and set up 
on your computer, so you do not...