Acer Extensa 365 Service Guide

							System Introduction1-11
Table 1-19 Windows 95 Key Descriptions
KeyDescription
Windows logo key Start button.  Combinations with this key performs special functions, e.g.:
·
Windows + Tab   Activate next Taskbar button
·
Windows + E   Explore My Computer
·
Windows + F   Find Document
·
Windows + M   Minimize All
·
Shift + Windows + M   Undo Minimize All
·
Windows + R   Display Run dialog box
Application key Opens the application’s context menu (same as right-click).
1.3.17 FDD
Table 1-20 FDD Specifications
ItemSpecification
Vendor & model name Mitsumi D353F2
Floppy Disk Specifications
Media recognition 2DD (720K) 2HD (1.2M, 3-mode) 2HD (1.44M)
Sectors / track 9 15 18
Tracks 80 80 80
Data transfer rate (Kbits/s) 250 300 500 500
Rotational speed (RPM) 300 360 360 300
Read/write heads 2
Encoding method MFM
Power Requirement
Input Voltage (V) +5 ± 10%
1.3.18 HDD
Table 1-21 HDD Specifications
ItemSpecification
Vendor & Model Name Hitachi DK225A-21 IBM DTNA22160 IBM DDLA21620
Drive Format
Capacity (MB) 2160 2160 1620
Bytes per sector 512 512 512
Logical heads 16 16 16
Logical sectors 63 63 63
Drive Format
Logical cylinders 4889 4200 3152
Physical read/write heads 6 6 3
Disks 3 3 2 
						

							1-12Service Guide
Table 1-21 HDD Specifications
ItemSpecification
Spindle speed (RPM) 4464 4000 4000
Performance Specifications
Buffer size (KB) 128 96 96
Interface ATA-3(IDE) ATA-3 ATA-3
Data transfer rate
(disk-buffer, Mbytes/s)5.7 ~ 9.0 5 ~ 7.7 5 ~ 8.3
Data transfer rate
(host-buffer, Mbytes/s)16.6 /33.3
(max., PIO mode 4)16.6
(max., PIO mode 4)16.6
(max., PIO mode 4)
DC Power Requirements
Voltage tolerance (V)
5 ± 5%5 + 5%
5 ± 5%
1.3.19 CD-ROM
Table 1-22 CD-ROM Specifications
ItemSpecification
Vendor & Model NameTeac-20X
Performance Specification
Speed (KB/sec) 2100 (ave. speed), 3000 (max.)
Access time (ms) 150 (Typ.)
Buffer memory (KB) 128
Interface Enhanced IDE (ATAPI) compatible
Applicable disc format CD-DA, CD-ROM, CD-ROM XA (except ADPCM), CD-I, Photo CD
(Multisession), Video CD, CD+
Loading mechanism Soft eject (with emergency eject hole)
Power Requirement
Input Voltage (V) 5
1.3.20 Battery
Table 1-23 Battery Specifications
ItemSpecification
Battery gauge on screen Yes, by hotkey
Vendor & model name Solomonbtp-1631(pack)/Toshiba(cell)
Battery type NiMH
Cell capacity (mAH) 3500
Cell voltage (V) 1.2
Number of battery cell 7-cell
Package configuration 7 serial
Package voltage (V) 8.4 
						

							System Introduction1-13
Table 1-23 Battery Specifications
ItemSpecification
Package capacity (WAH) 3500
Second battery No
1.3.21 Charger
To charge the battery, place the battery pack inside the battery compartment and plug the AC
adapter into the notebook and an electrical outlet.  The adapter has three charging modes:
· Rapid mode
The notebook uses rapid charging when power is turned off and a powered AC adapter is
connected to it.  In rapid mode, a fully depleted battery gets fully charged in approximately two
hours.
· Charge-in-use mode
W hen the notebook is in use with the AC adapter plugged in, the notebook also charges the
battery pack if installed.  This mode will take longer to fully charge a battery than rapid mode.
In charge-in-use mode, a fully depleted battery gets fully charged in approximately six to eight
hours.
· Trickle mode
The adapter charges the battery pack for two hours using trickle current 17 
± 3mA, then shifts
to 1/10 duty pulse trickle charge to keep the battery capacity at 100%.
Table 1-24 Charger Specifications
ItemSpecification
Vendor & model name Ambit T62.096.C.00
Input voltage (from adapter, V) 0-24
Output current (to DC/DC converter, A) 4.3
Battery Low Voltage
Battery Low 1 level (V)
8.2 
± 0.15
Battery Low 2 level (V)
7.8 
± 0.15
Battery Low 3 level (V)
6.8 
± 0.15
Charge Current
Background charge (charge even system is still operative, A)
0.9 
± 0.1 (typ.)
Normal charge (charge while system is not operative, A)
2.0 
± 0.1(typ.)
Charging Protection
Maximum temperature protection (     )60 
						

							1-14Service Guide
1.3.22 DC-DC Converter
DC-DC converter generates multiple DC voltage level for whole system unit use.
Table 1-25 DC-DC Converter Specifications
ItemSpecification
Vendor & model name Ambit T62.095.C.00
Input voltage (Vdc) 8~21
Output Rating5V3.3VVcpu
(2.47 /2.15
/1.8V/2.0V)
+12V+6V5VSB
Current (w/ load, A) 0~3.2 0~3.3 0~6 0~0.15 0~0.1 0.005
Voltage ripple (max., mV) 50 50 50 100 300 75
Voltage noise (max., mV) 100 100 100 200 500 250
OVP (Over Voltage Protection, V) 6.1~8.0 4.2~6.2 3-4 - - -
OCP (Over Current Protection,  A) 4-6 4-6 6.5-9 0.3-0.4 - -
1.3.23 DC-AC Inverter
DC-AC inverter is used to generate very high AC voltage, then supply to LCD CCFT backlight use,
and is also responsible for the control of LCD brightness.  Avoid touching the DC-AC inverter area
while the system unit is turned on.
Table 1-26 DC-AC Inverter Specifications
ItemSpecification
Vendor & model name Ambit T62.104.C.00
Input voltage (V) 6.8(in.) - 22(max.)
Input current (mA) - - 750 (max.)
Output voltage (Vrms, no load) 1000 (min.) - 1600 (max.)
Output voltage frequency (kHz) 40 (min.) - 65 (max.)
Output current (mArms) 1.0~5.5 (min.) 1.5~6.1 (typ.) 2.0~6.7 (max.)
1.3.24 LCD
Table 1-27 LCD Specifications
ItemSpecification
Vendor & model name TORiSAN
LM-JK53-22NFQTORiSAN
LM-JK53-22NFR-AHITACHI
TX31D21VC
Mechanical Specifications
LCD display area
(diagonal, inch)12.1 12.1 12.1
Display technology STN STN TFT
Resolution SVGA (800x600) VGA (800x600) SVGA (800x600) 
						

							System Introduction1-15
Table 1-27 LCD Specifications
ItemSpecification
Supported colors -- -- 262,144 colors
Optical Specification
Contrast ratio 40 (typ.) 40 (typ.) 80 (typ.)
Brightness (cd/m2)70 (typ.) 70 (typ.) 70 (typ.)
Brightness control keyboard hotkey keyboard hotkey keyboard hotkey
Contrast control using keyboard
hotkeyusing keyboard
hotkeynone
Electrical Specification
Supply voltage for LCD
display (V)3.3 or 5 (typ.) 3.3 or 5 (typ.) 3.0 ~ 3.6 (typ.)
Supply voltage for LCD
backlight (Vrms)630 (typ.) 630 (typ.) 595(typ.), 660(max)
1.3.25 AC Adapter
Table 1-28 AC Adapter Specifications
ItemSpecification
Vendor & model name Delta ADP-45GB Rev. E3, E5
Input Requirements
Nominal voltages (Vrms) 90 - 270
Nominal frequency (Hz) 47 - 63
Frequency variation range (Hz) 47 - 63
Maximum input current (A, @90Vac, full load) 1.5 A
Inrush current The maximum inrush current will be less than 50A and
100A  when the adapter is connected to 115Vac(60Hz)
and 230Vac(50Hz) respectively.
Efficiency It should provide an efficiency of 83% minimum, when
measured at maximum load under 115V(60Hz).
Output Ratings (CV mode)
DC output voltage (V) +19.0V~20.5V
Noise + Ripple (mV) 300mvp-pmax (20Mhz bandwidth)
Output Ratings (CV mode)
Load (A) 0 (min.) 2.4 (max.)
DC output voltage (V) +12 ~+19
Constant output (A) 2.75 ± 0.2
Dynamic Output Characteristics
Turn-on delay time (s, @115Vac) 2
Hold up time (ms; @115 Vac input, full load) 5 (min.)
Over Voltage Protection (OVP, V) 26 
						

							1-16Service Guide
Table 1-28 AC Adapter Specifications
ItemSpecification
Short circuit protection Output can be shorted without damage
Electrostatic discharge (ESD, kV)±15 (at air discharge)
Dielectric Withstand Voltage
Primary to secondary 3000 Vac (or 4242 Vdc), 10 mA for 1 second
Leakage current 0.25 mA maximum @ 254 Vac, 60Hz.
Regulatory Requirements
Internal filter meets:
1.  FCC class B requirements. (USA)
2.  VDE 243/1991 class B requirements. (German)
3.  CISPR 22 Class B requirements. (Scandinavia)
4.  VCCI class II requirements. (Japan) 
						

							System Introduction1-17
1.4  Software Configuration and Specification
1.4.1 BIOS
The BIOS is compliant to PCI v2.1, APM v1.2, E-IDE and PnP specification.  It also defines the
hotkey functions and controls the system power-saving flow.
Keyboard Hotkey Definition
The notebook supports the following hotkeys.
Table 1-29 Hotkey Descriptions
HotkeyIconFunctionDescription
Fn-Esc Hotkey Escape Exits the hotkey control.
Fn-F1?Hotkey Help
Displays the hotkey list and help.  Press | to exit the screen.
Fn-F2Brightness Control
Contrast Control
Toggles between brightness control and contrast control.
Press the scale hotkeys (Fn- 
®and Fn
 -¬) to increase and
decrease the brightness or contrast level.
Notebooks with TFT displays do not show the brightness
control icon.
Fn-F3Display Toggle Switches display from LCD to CRT to both LCD and CRT.
Fn-F4Battery GaugeDisplays the battery gauge.
Fn-F5Volume ControlPress the scale hotkeys (Fn-® and Fn-¬) to increase and
decrease the output level.
Fn-F6Setup Gains access to BIOS Setup’s Advanced System
Configuration parameters.
Fn-F7Hibernation/Standby Enters hibernation mode if the 0-volt suspend function is
installed and enabled; otherwise, the notebook enters standby
mode.
Fn-®Scale Increase Increases the setting of the current icon.
Fn-¬Scale Decrease Decreases the setting of the current icon.
Fn-T Toggle Touchpad Turns the internal touchpad on and off.
When the available hotkey is toggled, the system will issue a beep to enter the
assigned process. 
						

							1-18Service Guide
MultiBoot
The system can boot from the FDD, External FDD, HDD, or CD-ROM.  The user can select the
desired booting process to boot the system.  If the CD-ROM is bootable, the BIOS will override the
other process to boot the system directly.
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, floppy 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 an innovative power management technique called Heuristic Power
Management or HPM.  HPM allows the computer to provide maximum power conservation and
maximum performance at the same time.
Power management methods used by most computers are timer-based.  You set inactivity time-out
values for the display, hard disk, and other devices.  The computer then sleeps when these time-
outs elapse.  The problem with this is that no two users are alike.  Each of us has his or her own
habits when using the computer, which makes timer-based power management ineffective.
W ith HPM, your computer manages its power according to the way you use your computer.  This
means the computer delivers maximum power when you need it, and saves power when you don’t
need the maximum — all without your intervention.  There are no timers to set, because the HPM
system figures out everything for you.
HDD Standby Timer Time Out
Idle of HDD
Power Off
Display Screen Off
Normal Mode
Hibernation Mode
Standby Mode
Standby Mode
HDD Standby Mode
(HDD Motor Off)
Light Green Mode
Light Green Mode
Check password if needed
Power Switch Off More than 3 SecondsCover Door Close
Power Switch On
K/B, PS/2 Mouse Pressed
Standby EventSystem Active
Power Switch (Beep)
Standby Wakeup 
Cover Door ClosePower Switch (Beep)
Cover Door Open Power Switch Event  Display Standby 
Timer Time Out
Hibernation
 Event
HDD Acess
Figure 1-3 Power Management Block Diagram 
						

							System Introduction1-19
ON MODE
Normal full-on operation
STANDBY MODE
The computer consumes very low power in standby mode.  Data remain intact in the system
memory until battery is drained.
Warning: Unstored data is lost when you turn off the computer power in standby
mode or when the battery is drained.
Table 1-30 Standby Mode Conditions and Descriptions
ConditionDescription
The condition to
enter Standby
ModeThere are two necessary conditions for the computer to enter standby mode:
· Heuristic Power Management Mode must be set to [ENABLED].
In this situation, the following are ways to enter standby mode:
· Pressing the sleep hot key Fn-F7
· If the waiting time determined by the computer’s HPM unit elapses without any
system activity.
· Closing the display cover.
· With the System Sleep State is set to [HIBERNATION], the computer also enters
standby mode if the hibernation file (Sleep Manager) is invalid or not present.
· “Hard Disk Drive” is [Disabled] in System Security of BIOS SETUP.
· “Hard Disk 0” is [None] in Basic System Configuration of BIOS SETUP.
Note:
   If the computer detects a PC I/O card installed in the PC card slots, the computer
sleeps (light green mode) to maintain your communications connection.  It will not enter
standby mode.
The condition of
Standby Mode· Issue a beep.
· The standby indicator flashes.
· Disable the mouse, serial and the parallel port.
· The keyboard controller, HDD and VGA enter the standby mode.
· Stop the CPU internal clock.
· All the functions are disabled except the keyboard, battery low warning and modem
ring wake up from standby (if enabled).
The condition
back to On
ModeAny one of following activities will let system back to Normal Mode:
· Any keystroke (Internal KB or External KB)
· Any active pointing device (internal or external, PS/2 or serial or USB)
· Resume Timer matched
· Opening the display cover if you closed the display cover to enter Standby mode.
· Modem ring 
						

							1-20Service Guide
LIGHT GREEN MODE
The notebook consumes very low power in light green mode.  Data and I/O connections remain
intact in the system memory until battery is drained.
Table 1-31 Light Green Mode Conditions and Descriptions
ConditionDescription
The condition to enter
Light Green Mode· PCMCIA I/O Card detected and occupy resources (Non Cardbus mode).
· HPM timer times out or cover close or APM standby / suspend function calls.
The condition of Light
Green Mode· Issue a beep.
· Only HDD, VGA enter standby
The condition back to
On ModeAny one of following activities will let system back to Normal Mode:
· Any keystroke (Internal KB or External KB)
· Any active pointing device (internal or external, PS/2 or serial or USB)
· Resume Timer matched
· Modem ring
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.
If the computer beeps but does not enter hibernation mode after pressing the sleep
hot key, it means the operating system will not allow the computer to enter the power
saving mode.
Do not change any devices (such as add memory or swap hard disks when the
computer is in hibernation mode.
If the computer detects a PC I/O card installed in the PC card slots, the computer
enters light green mode to maintain your communications connection.  It will not
enter standby nor hibernation mode.