Acer Aspire 7720g Service Guide

							Chapter 15
Board Layout
Top View
1 JP1 LCD Connector 9 JP36 Mainboard to LED Board 
Connector
2 JP3 Speaker (Left) Connector 10 U12
3 JP34 Speaker (Right) Connector 11 JP9 PCI Express Card Socket
4 JP4 Internal MIC Connector 12 LED1 Power/Suspend LED
5 U5 South Bridge (ICH8M) 13 LED2 Battery Charge/Discharge LED
6 JP6 Internal Track-Pad Connector 14 JP13 Mainboard to Audio Board 
Connector
7 JP5 Internal Keyboard Connector 15 JP11 Mainboard to USB Board 
Connector
8 JP2 Mainboard to Button Board 
Connector16 JP12 Bluetooth Module Connector
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							6Chapter 1
Bottom View
1 PJP1 DC-in Power Jack 14 JP24 TV-out Connector
2 PJP2 Battery Connector 15 JP26 IEEE1394 Connector
3 JP14 CRT Connector 16 JP27 SATA HDD Connector
4 JP15 DVI-D Connector 17 U23 North Bridge (965PM/965GM)
5 JP25 ODD Connector 18 U28
6 JP20 Mini Card (WLAN) Socket 19 U29 Volume Control
7 JP19 Mini Card (TV-Tuner) Socket 20 JP28 DDRII Memory Socket
8 JP17 MDC Connector 21 JP29 DDRII Memory Socket
9 JP22 CPU Socket 22 JP31 Headphone/SPDIF Jack
10 JP16 Internal Fan Connector 23 JP32 Mic-in Jack
11 JP19 VGA Board Connector 24 U33 Audio Codec Controller
12 JP18 RJ45 (LAN) Connector 25 JP33 Line-in Jack
13 JP23 USB (Dual) Connectors
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							Chapter 17
Your Acer Notebook Tour
After knowing your computer features, let us show you around your new Aspire computer.
Front View
#IconItemDescription
1 Built-in camera 0.3 megapixel web camera for video 
communication.
2 Power button Turns the computer on and off.
3 Wireless communication 
button/indicatorEnables/disables the wireless function. 
Indicates the status of wireless LAN 
communication.
4 Easy-launch buttons Buttons for launching frequently used 
programs.
5
Bluetooth
® 
communication button/
indicatorEnables/disables the Bluetooth® function. 
Indicates the status of Bluetooth 
communication.
6 Keyboard For entering data into your computer.
7 Touchpad Touch-sensitive pointing device which 
functions like a computer mouse.
8 Scroll button Press up, down, left and right to scroll 
around the screen. 
						

							8Chapter 1
Closed Front View
9 Status indicators Light-Emitting Diodes (LEDs) that light up 
to show the status of the computer’s 
functions and components.
10 Click buttons (left and 
right)The left and right buttons function like the 
left and right mouse buttons.
11 Microphone Internal microphone for sound recording.
12 Display screen Also called Liquid-Crystal Display (LCD), 
displays computer output.
13 Empowering button Launches the Empowering Technology 
toolbar.
14 Speaker Left and right speakers deliver stereo audio 
output.
15 Palmrest Comfortable support area for your hands 
when you use the computer.
#IconItemDescription
1 Power indicator Indicates the computer’s power status.
2 Battery indicator Indicates the computer’s battery status.
3 Line-in jack Accepts audio line-in devices (e.g., audio 
CD player, stereo walkman).
4 Microphone-in jack Accepts input from external microphones.
5 Headphones/speaker/
line-out jack with S/PDIF 
supportConnects to audio line-out devices (e.g., 
speakers, headphones).
6 LCD display latch Secures the LCD display in place when 
closed.
7 Infrared port Interfaces with infrared devices (e.g. 
infrared printer and IR-aware computer). 
						

							Chapter 19
Left View
#IconItemDescription
1 Kensington lock slot Connects to a Kensington-compatible 
computer security lock.
2 External display (VGA) 
portConnects to a display device (e.g., external 
monitor, LCD projector).
3
DVIDVI-D port Supports digital video connections.
4 Ethernet (RJ-45) Connects to an Ethernet 10/100/1000-
based network (for selected models).
5 2 USB 2.0 port Connect to USB 2.0 devices (e.g., USB 
mouse, USB camera).
6 S-video/TV-out (NTSC/
PAL) port Connects to a television or display device 
with S-video input.
7 4-pin IEEE 1394 port Connects to IEEE 1394 devices.
8 Volume control Increases and decreases the volume.
9 5-in-1 card reader Accepts Secure Digital (SD), 
MultiMediaCard (MMC), Memory Stick 
(MS), Memory Stick PRO (MS PRO), xD-
Picture Card (xD).
10 PCI Express Card slot Accepts an Express Card/54 module.
Note: Express Cards are third generation 
of PC cards, hot-swapable and maller than 
previous PC Cards. Designed for both 
desktop and mobile use, Express Cards 
use either USB 2.0 or a single lane PCI 
Express technology that provides 500 
Mbytes/sec total throughput. Formerly 
code named “NEWCARD,” Express Cards 
are 5mm thick like Type II PC Cards, but do 
not use the same 86x54mm footprint. 
Express Cards come in 75x54mm and 
75x34mm sizes. Express Card/54 slot 
means this notebook accepts 75x54mm 
Express Cards. 
						

							10Chapter 1
Right View
Rear view
#IconItemDescription
1 2 USB 2.0 ports Connect to USB 2.0 devices (e.g., USB 
mouse, USB camera).
2 AV-in port Accepts input signals from audio/video 
(AV) devices.
3 Optical drive Internal optical drive; accepts CDs or DVDs 
(slot-load or tray-load depending on 
model).
4 Optical disk access 
indicatorLights up when the optical drive is active.
5 Optical drive eject 
buttonEjects the optical disk from the drive.
6 Emergency eject hole Ejects the optical drive tray when the 
computer is turned off.
7 Modem (RJ-11) port Connects to a phone line.
8 RF-in port Accepts input signals from analog/digital 
TV-tuner devices (for selected models).
#IconItemDescription
1 DC-in jack Connects to an AC adapter.
2 Ventilation slots Enable the computer to stay cool, even 
after prolonged use. 
						

							Chapter 111
Base view
Indicators
The computer has several easy-to-read status indicators.
The front panel indicators are visible even when the computer cover is closed up.
#ItemDescription
1 Battery bay Houses the computer’s battery pack.
2 Battery release latch Releases the battery for removal.
3 Battery lock Locks the battery in position.
4 Hard disk bay Houses the computer’s hard disk (secured with screws)
5 & 6 Ventilation slots and 
cooling fanEnable the computer to stay cool, even after prolonged use.
Note: Do not cover or obstruct the opening of the fan. 
						

							12Chapter 1
NOTE: 1. Charging: The light shows amber when the battery is charging. 2. Fully charged: The light shows 
green when in AC mode.
Easy-Launch Buttons
To the top of the keyboard there are four easy-launch buttons: Web browser, mail, arcade buttons and an 
Empowering Key “ .
Press “  “ to run the Acer Empowering Technology. The mail and Web browser buttons are pre-set to email 
and Internet programs, but can be reset by users. To set the Web browser and mail buttons, run the Launch 
Manager.
IconFunctionDescription
Power Lights up when the computer is on.
Battery Lights up when the battery is being charged.
Wireless LAN Indicates the status of wireless LAN communication.
Bluetooth Indicates the status of Bluetooth communication.
HDD Indicates when the hard disc or optical drive is active.
Num lock Lights when Num Lock is activated.
Cap lock Lights when Cap Lock is activated 
						

							Chapter 113
Touchpad Basics
The following teaches you how to use the touchpad:
TMove your finger across the touchpad (2) to move the cursor. 
TPress the left (1) and right (4) buttons located beneath the touchpad to perform selection and 
execution functions. These two buttons are similar to the left and right buttons on a mouse. 
Tapping on the touchpad is the same as clicking the left button.
TThe center (3) button to mimics your cursor pressing on the right scroll bar of Windows 
applications.
NOTE: When using the touchpad, keep it - and your fingers - dry and clean. The touchpad is sensitive to finger 
movements; hence, the lighter the touch, the better the response. Tapping too hard will not increase the 
touchpad’s responsiveness.
Launch ButtonDefault application
Acer Empowering Technology (user-programmable)
Web browser Internet browser (user-programmable)
Mail Email application (user-programmable)
Arcade Windows Media Center
FunctionLeft Button (1)Right Button (4)Main touchpad (2)Center button (3)
Execute Click twice quickly Tap twice (at the 
same speed as 
double-clicking the 
mouse button)
Select Click once Tap once
Drag Click and hold, then 
use finger on the 
touchpad to drag 
the cursor.Tap twice (at the 
same speed as 
double-clicking a 
mouse button); rest 
your finger on the 
touchpad on the 
second tap and 
drag the cursor.
Access context 
menuClick once
ScrollClick and hold to 
move up/down/left/
right. 
						

							14Chapter 1
Using the Keyboard
The keyboard has full-sized keys and an embedded keypad, separate cursor keys, one Windows key and 
twelve function keys.
Lock Keys and embedded numeric keypad
The keyboard has three lock keys which you can toggle on and off.
The embedded numeric keypad functions like a desktop numeric keypad. It is indicated by small characters 
located on the upper right corner of the keycaps. To simplify the keyboard legend, cursor-control key symbols 
are not printed on the keys.
Lock KeyDescription
Caps  Lock When Caps Lock is on, all alphabetic characters typed 
are in uppercase.
Num lock   
+When Num Lock is on, the embedded keypad is in 
numeric mode. The keys function as a calculator 
(complete with the arithmetic operators +, -, *, and /). 
Use this mode when you need to do a lot of numeric 
data entry. A better solution would be to connect an 
external keypad. 
Scroll lock   
+When Scroll Lock is on, the screen moves one line up 
or down when you press the up or down arrow keys 
respectively. Scroll Lock does not work with some 
applications.
Desired AccessNum Lock OnNum Lock Off
Number keys on embedded 
keypadType numbers in a normal 
manner.
Cursor-control keys on 
embedded keypadHold  while using 
cursor-control keys.Hold  while using 
cursor-control keys.
Main keyboard keys Hold  while typing 
letters on embedded 
keypad.Type the letters in a normal 
manner.