Acer Extensa 2500 Service Guide
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12Chapter 1 Understanding the icons When the cover of your computer is closed, 2 easy-to-read icons are shown, indicating which state or feature is enabled or disabled. #IconFunctionDescription 1 Power Lights up when the computer is on. 2 Sleep Lights when the computer enters Standby mode and blinks when it enters into or resumes from hibernation mode.
Chapter 113 Keyboard The keyboard has full-sized keys and an embedded keypad, separate cursor keys, two Windows keys and twelve function keys. Special keys Lock keys The keyboard has three lock keys which you can toggle on and off. Embedded numeric keypad 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 @is on, all alphabetic characters typed are in uppercase. Num Lock (Fn-F11) ] When ] 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 (Fn-F12) [ When [ is on, the screen moves one line up or down when you press the up or down arrow keys respectively. [ does not work with some applications.
14Chapter 1
NOTE: If an external keyboard or keypad is connected to the computer, the Num Lock feature automatically
shifts from the internal keyboard to the external keyboard or keypad.
Windows keys
The keyboard has two keys that perform Windows-specific functions.
Desired accessNum lock onNum lock off
Number keys on embedded
keypadType numbers in a normal manner.
Cursor-control keys on embedded
keypadHold Shift while using cursor-control keys. Hold Fn while using cursor-control
keys.
Main keyboard keys Hold Fn while typing letters on embedded
keypad.Type the letters in a normal manner.
KeysDescription
Windows logo key
Start button. Combinations with this key perform shortcut functions. Below
are a few examples:
+ Tab (Activates next taskbar button)
+ E (Explores My Computer)
+ F (Finds Document)
+ M (Minimizes All)
j+ + M (Undoes Minimize All)
+ R (Displays the Run... dialog box)
Application key Opens a context menu (same as a right-click).
Chapter 115 Hot Keys The computer employs hot keys or key combinations to access most of the computer’s controls like screen contrast and brightness, volume output and the BIOS Utility. To activate hot keys, press and hold the Fn key before pressing the other key in the hot key combination. Hot KeyIconFunctionDescription Fn- lHotkey help Displays a list of the hotkeys and their functions. Fn- mSetup Accesses the notebook configuration utility. Fn- nPower Management Scheme ToggleSwitches between the power management scheme used by the computer (function available if supported by operating system). Fn- oSleep Puts the computer in Sleep mode. Fn- pDisplay toggle Switches display output between the display screen, external monitor (if connected) and both the display screen and external monitor. Fn- qScreen blank Turns the display screen backlight off to save power. Press any key to return. Fn- rTouchpad Toggle Turns the internal touchpad on and off. Fn- sSpeaker on/off Turns the speakers on and off; mutes the sound. Fn- wVolume up Increases the sound volume. Fn- yVolume down Decreases the sound volume. Fn- xBrightness up Increases the screen brightness.
16Chapter 1
The Euro symbol
If your keyboard layout is set to United States-International or United Kingdom or if you have a keyboard with a
European layout, you can type the Euro symbol on your keyboard.
NOTE: for US keyboard users: The keyboard layout is set when you first set up Windows. For the Euro
symbol to work, the keyboard layout has to be set to United States-international.
To verify the keyboard type:
1.Click on Start, Control Panel.
2.Double-click on Regional and Language Options.
3.Click on the language tab and click on Details.
4.Verify that the keyboard layout used for “EN English (United States) is set to United States-International.
If not, select and click on ADD, then select United States-International and click on OK.
5.Click on OK.
To type the Euro symbol:
1.Locate the Euro symbol on your keyboard.
2.Open a text editor or word processor.
3.Hold
aGr and press the Euro symbol. Fn-
¨
zBrightness down Decreases the screen brightness.
Fn-
{Home
Functions as the g key.
Fn-
}End
Functions as the d key.
aGr-EuroEuro Types the Euro symbol.
Hot KeyIconFunctionDescription
Chapter 117 Launch Keys Located at the top of the keyboard are six buttons. These buttons are called lauch keys. They are designated as mail button, Web browser button, P1, P2, Bluetooth and Wireless buttons. The Wireless and Bluetooth buttons cannot be set by the user. To set the other four launch keys, run the Acer Launch Manager. #IconFunctionDescription 1 Mail Email application 2 Web browser Internet browser application 3 P1 User-programmable 4 P2 User-programmable 5 Bluetooth Starts (optional) Bluetooth functionality and indicates that (optional) Bluetooth is enabled. 6 Wireless Opens (optional) wireless connectivity and indicates status of (optional) wireless communication.
18Chapter 1 Hardware Specifications and Configurations System Board Major Chips Item Controller System core logic Intel ICH4-M Super I/O controller NS PC87392 Audio controller Cirrus logic CS4299-XQ Video controller Intel 852GME (Montara-GT) Hard disk drive controller Embedded in Intel ICH4 Keyboard controller Mitsubish LPC keyboard controller M38857 CardBus Controller TI 1520 RTC Intel ICH4 Processor (for TravelMate 240) ItemSpecification CPU type Intel Cerelon processor CPU package To 2.0GHz uFCBGA CPU core voltage High speed: 1.525V or 1.55V Low speed: 1.2V CPU I/O voltage High speed: 1.525V or 1.55V Low speed: 1.2V Processor (for TravelMate 250) ItemSpecification CPU type Intel Petium 4 processor CPU package To 2.4GHz uFCBGA CPU core voltage 1.525V CPU I/O voltage 1.525V BIOS ItemSpecification BIOS vendor Phoenix BIOS BIOS Version TM240 V1.00 for TM240; TM250 V1.00 for TM250 BIOS ROM type Flash ROM BIOS ROM size 512KB BIOS package 32 Pin PLCC Supported protocols ACPI 2.0 (if available, at least 1.0b), SMBIOS 2.3, PCI 2.2, Boot Block, PXE 2.0, Mobile PC2001, Hard Disk Password, INT 13h Extensions, PCI Bus Power Management interface Specification, EI Torito-Bootable CD- ROM Format Specification V1.0, Simple Boot Flag 1.0 BIOS password control Set by switch, see SW1 settings Second Level Cache ItemSpecification Cache controller Built-in CPU
Chapter 119 Cache size 128KB for TM240/512KB for TM250 1st level cache control Always Enabled 2nd level cache control Always Enabled Cache scheme control Fixed-in write back System Memory ItemSpecification Memory controller Intel 852GME (Montara-GT) Onboard memory size 0MB DIMM socket number 2 Sockets Supports memory size per socket 128MB Supports maximum memory size 2048MB Supports DIMM type DDR-DRAM Supports DIMM Speed 266 MHz/333 MHz Supports DIMM voltage 2.5 V Supports DIMM package 200-pin so-DIMM Memory module combinations You can install memory modules in any combinations as long as they match the above specifications . Memory Combinations Slot 1Slot 2To ta l M e m o r y 0MB 128MB 128 MB 128MB 0MB 128 MB 128MB 128MB 256 MB 256MB 0MB 256MB 0MB 256MB 256MB 256MB 128MB 384MB 128MB 256MB 384MB 256MB 256MB 512MB 0MB 512MB 512MB 512MB 128MB 640MB 256MB 512MB 768MB 128MB 512MB 640MB 512MB 256MB 768MB 256MB 128MB 384MB 512MB 512MB 1024MB 0MB 512MB 512MB 1024MB 0MB 1024MB 1024MB 128MB 1152MB 1024MB 256MB 1280MB 1024MB 512MB 1536MB 0MB 1024MB 1024MB 128MB 1024MB 1152MB 256MB 1024MB 1280MB Second Level Cache ItemSpecification
20Chapter 1 Above table lists some system memory configurations. You may combine DIMMs with various capacities to form other combinations. . 512MB 1024MB 1536MB LAN Interface ItemSpecification Chipset RealTek 8101L Supports LAN protocol 10/100Mbps LAN connector type RJ45 LAN connector location Rear side Modem Interface ItemSpecification Chipset Internal Agere Scorpio chipset (Scorpio+CSP1037B) Fax modem data baud rate (bps) 14.4K Data modem data baud rate (bps) 56K Supports modem protocol V.90/V.92MDC Modem connector type RJ11 Modem connector location Rear side Floppy Disk Drive Interface ItemSpecification Vendor & model name Mitsumi D353G 4515 MCI JU-226A033FC Floppy Disk Specifications Media recognition 2DD (720KB) 2HD (1.2 MB, 3 mode) 2HD (1.44MB) Sectors/track 9 15 18 Tracks 80 80 80 Data transfer rate (Kbit/s)1 MB 1.6 MB 2 MB Rotational speed (RPM) 300 360 300 Read/write heads 2 Encoding method MFM Power Requirement Input Voltage (V) +5V Hard Disk Drive Interface Item Vendor & Model NameHGST Moraga IC25N030ATMR04 Fujitsu V-40 MHT2030AT Seagate N1 ST93015AHGST Moraga IC25N040ATMR04- TOSHIBA Pluto 40G MK4025GAS Fujitsu V40+ MHT2040AT Seagate N1 ST94019AHGST Moraga IC25N060ATMR04-0 HGST Fresno DK23FA-60 TOSHIBA Neptune MK6021GAS Capacity (MB) 30000 40000 60000 Memory Combinations Slot 1Slot 2To ta l M e m o r y
Chapter 121
Bytes per sector 512 512 512
Logical heads 16 16 16
Logical sectors 63 63 63
Drive Format
Logical cylinders 16383 16383 16383
Physical read/write
heads2/Not show/2 2/Not show/2/2 3/
Disks 1/Not show/1 1/Not show/1/1 2
Spindle speed (RPM) 4200RPM 4200RPM 4200RPM
Performance Specifications
Buffer size 2MB 2MB/8MB for Toshiba 2MB
Interface ATA-5 for other vendors /ATA-
6 for HGST and ToshibaATA-5 for other vendors /ATA-
6 for HGSTATA-5 for other vendors /ATA-
6 for HGST
Data transfer rate
(disk-buffer, Mbytes/
s)350 350 350
Data transfer, rate
(host~buffer, Mbytes/
s)100 MB/Sec 100 MB/Sec 100MB/Sec
DC Power Requirements
Voltage tolerance 5 +/- 5% 5 +/- 5%
CD-ROM Interface
ItemsSpecification
Vendor & Model Name QSI SCR242
Mitsumi SR244W1
Performance Specification
Brust Data Transfer rate PIO mode 4:
16.7 MB/sec Max. (Mode 0~4)
Multi-word DMA mode 2:
16.7 MB/sec Max. (Mode 0~2)
Ultra DMA mode 2:
33.3MB/sec Max.
Access time (typ.) QSI-
Random: 90 ms
Full Stroke: 180 ms
Mitsumi-
Random: 100 ms
Full Stroke: 240 ms
Rotation speed 5100 rpm for QSI
5400 rpm for Mitsumi 24X CAV mode
Data Buffer Capacity 128 KB (built-in)
Interface Compliant to ATA/ATAPI-6
Hard Disk Drive Interface
Item