Acer Aspire 9120 Service Guide

Chapter 15
Board Layout
Top View
JP9 PCMCIA Socket SW5 Touchpad Left Button
IR1 FIR Module SW2 Touchpad Up Button
JP1 LCD Connector SW7 Touchpad Down Button
SW1 Lid Switch SW6 Touchpad Right Button
JP3 MDC Connector SW4 Touchpad Right Button
JP38 Camera Connector JP43 SIM Card Connector
JP2 Power Button Connector JP11 CD Player Board Connector
JP6 Media Board Connector JP13 Internal Microphone Connector
JP7 Touchpad Board Connector JP12 Internal Speaker Connector
JP8 Internal Speaker Connector JP44 Audio...

6Chapter 1
Bottom View
NOTE: This is engineering sample. The image above may not be exactly the same as the real main board you 
get.
JP30 Mini Card Connector JP22 DDRII so-Dimm Socket
JP29 IEEE 1394 Connector JP21 DDRII so-Dimm Socket
JP27 5-in-1 CardReader Socket JP20 Subwoofer Connector
JP23 RJ45 Connector J3 Clear CMOS Jumper
JP5 USB Connector JP24 ODD Connector
JP4 USB Connector PJP1 Battery Connector
JP19 FAN Connector JP32 HDD Connector (SATA)
U42 VGA Chipset JP33 HDD Connector (PATA)
JP18 CPU...

Chapter 17
Jumper Settings
LocationDescription
J3 Clear CMOS Password 

8Chapter 1
Your Acer Notebook tour
After knowing your computer features, let us show you around your new Aspire computer.
#IconItemDescription
1 Built-in camera 1.3 megapixel web camera for video 
communication.
2 Display screen Also called Liquid-Crystal Display (LCD), 
displays computer output.
3 Keyboard For entering data into your computer.
4 Touchpad Touch-sensitive pointing device which 
functions like a computer mouse.
5 Click buttons (left, 
center and right)The left and right buttons function...

Chapter 19
Closed Front View
10 Microphone Internal microphone for sound recording.
11 3G button/indicator Enables/disables the 3G function. Indicates 
the status of 3G communication (for 
selected models).
12
Bluetooth
®  
communication button/
indicatorEnables/disables the Bluetooth®  function. 
Indicates the status of Bluetooth 
communication.
13 Wireless 
communication button/
indicatorEnables/disables the wireless function. 
Indicates the status of wireless LAN 
communication.
14 Easy-launch buttons...

10Chapter 1
Left View
#IconItemDescription
1 Kensington lock slot Connects to a Kensington-compatible 
computer security lock.
2 Ventilation slots Enable the computer to stay cool, even 
after prolonged use.
3 Two USB 2.0 ports Connects to USB 2.0 devices (e.g., USB 
mouse, USB camera).
4 Modem (RJ-11) port Connects to a phone line.
5 Infrared port Interfaces with infrared devices (e.g., 
infrared printer and IR-aware computer).
6 5-in-1 card reader Accepts Secure Digital (SD), 
MultiMediaCard (MMC),...

Chapter 111
Right View
Rear Panel
9 Express Card/34 slot Accepts and ExpressCard/34 module
Note: ExpressCards are third generation of 
PC cards, hot-swapable and smaller than 
previous PC Cards. Designed for both 
desktop and mobile use, ExpressCards 
use either USB 2.0 or a single lane PCI 
Express technology that provides 500 
Mbytes/sec total throughput. Formerly 
code named NEWCARD, ExpressCards 
are 5 mm thick like Type II PC Cards, but 
do not use the same 86x54 mm footprint. 
ExpressCards come in...

12Chapter 1
Bottom Panel
#IconItemDescription
1 Ethernet (RJ-45) Connects to an Ethernet 10/100/1000-
based network (for selected models).
2 Two USB 2.0 ports Connect to USB 2.0 devices (e.g., USB 
mouse, USB camera).
3 RF-in jack Accepts input signals from analog/digital 
TV-tuner devices. (manufacturing 
option).
4 AV-in port Accepts input signals from audio/video 
(AV) devices (manufacturing option).
5 DC-in jack Connects to an AC adapter.
6 S-video/TV-out 
(NTSC/PAL) port Connects to a television or...

Chapter 113
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 Hard disk bay Houses the computer’s hard disk (secured 
with screws)
2 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.
3 Memory compartment Houses the computer’s main memory.
4 Sub woofer Emits low frequency sound output.
5...

14Chapter 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
Located above the keyboard are four buttons. These buttons are called easy-launch buttons. They are: mail 
Web browser, Empowering Key “ “and one user-programmable button.
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...