Acer Extensa 2500 Service Guide

22Chapter 1
Applicable disc format QSI:
CD-DA, CD-ROM Mode-1, CD-ROM/XA Mode-2, Form-1 and Mode-2 Form-2, CD-i 
Ready, Video-CD (MPEG-1), Karaoke CD, Photo-CD, Enhanced CD, CD Plus, CD 
Extra, i-trax CD, CD-Text, CD-R and CD-RW
Mitsumi:
CD-DA, CD-ROM (Mode 1 and Mode2) CD-ROM XA (Mode 2 Form 1 and Form2), 
CD-I (Mode2 Form 1 and Form 2), CD-I Bridge (Photo CD, CD EXTRA), Enhanced 
CD, CD-RW, CD-R, CD-TEXT
Loading mechanism Drawer with soft eject and emergency eject hole
Power Requirement
Input Voltage...

Chapter 123
Applicable disc format DVD: DVD-5, DVD-9, DVD-10, DVD-R (3.95G), DVD-RAM (2.6G), DVD-
RAM (4.7G)
CD: CD-Audio, CD-ROM (mode 1 and mode 2), CD-ROM XA (mode 2, form 
1 and form 2), CD-I (mode 2, form 1 and form 2), CD-I Ready, CD-I Bridge, 
CD-WO, CD-RW, Photo CD, Video CD, Enhanced Music CD, CD-TEXT
Loading mechanism Soft eject (with emergency eject hole)
Power Requirement
Input Voltage +5V[DC]+/-5%
Combo Drive Interface
ItemSpecification
Vendor & model name KME UJDA750
Performance...

24Chapter 1
Disc type for read/write application
Applicable Formats CD-DA, CD-TEXT, CD ROM Mode-1, CD-ROM/XA Mode-2 Form-1 and 
Form-2, CD-I Ready, Video-CD (MPEG-1), Karaoke-CD, Photo-CD, 
Enhance CD, CD extra, I-Trax CD and UDF DVD-ROM, DVD-Video, DVD-
Audio,
DVD-R single/multi border(s)
DVD+R single/multi session(s)
DVD-RW
DVD+RW
Applicable Media Type CD-ROM, CD-R and CD-RW
DVD-ROM (4.7G/8.54G) single layer on single/double side (read only), 
DVD-ROM dual layer (PTP/OTP) on single/double side (read...

Chapter 125
  
Pick-up NA:                    CD: 0.51
                           DVD: 0.65
Focusing:          Astigmatism
Tracking:           CD: DPP
                           DVD-ROM: DPD
                           DVD+R/RW: DPP
Wave length:     CD: 785+/- 5 nm
                           DVD: 650+/- 15 nm
Output power:
Read CD:     1.5 mw max@objective lens
           DVD:  1.0 mw max
Write CD:      65 mw max2@objective lens
           DVD:  20 mw max
Traverse mechanism DC Stepping motor driven...

26Chapter 1
 
  Video Memory
ItemSpecification
Fixed or upgradeable Fixed, share the system memory
Video memory size 8MB
Video Resolutions Mode
ResolutionRefresh Rate
CRT Only LCD/CRT Simultaneous
640x480x256 90 60
640x480x64K 90 60
640x480x16M 90 60
800x600x256 90 60
800x600x64K 90 60
1024x768x256 90 60
Parallel Port
ItemSpecification
Parallel port controller NS PC87392
Number of parallel port 1
Location Rear side
Connector type 25-pin D-type
Parallel port function control Enable/Disable by BIOS Setup...

Chapter 127
  
 
Supports 32 bit CardBus  Yes (IRQ17)
Keyboard
ItemSpecification
Keyboard controller Mitsubishi LPC keyboard controller M38857
Keyboard vendor & model name API
Total number of keypads 84-/85- key
Windows 95 keys Yes
Internal & external keyboard work simultaneously Yes
Battery 
ItemSpecification
Vendor & model name SIMPLO
Battery Type Li-ION 
Pack capacity  4000mAH
Cell voltage  3.8V / 1.2V
Number of battery cell 8
Package configuration 4529 / 8S
Package voltage  41.8V / 9.6V
DC-DC/Charger...

28Chapter 1
NOTE: DC-AC inverter is used to generate very high AC voltage, then support to LCD CCFT backlight user, 
and is also responsible for the control of LCD brightness. Avoid touching the DC-AC inverter area while 
the system unit is turned on. 
NOTE: There is an EEPROM in the inverter, which stores its supported LCD type and ID code. If you replace 
a new inverter or replace the LCD with a different brand, use Inverter ID utility to update the ID 
information.
. DC-AC LCD Inverter...

Chapter 129
 
Frequency variation range (Hz) 47-63
Input voltage range (Vrms) 90-270
Inrush current The maximum inrush current will be less than 50A and 100A when the adapter 
is connected to 115Vac and 230Vac respectively.
Efficiency  It should provide an efficiency of 80% minimum, when measured at maximum 
load under 115Vac.
Output Ratings (CV mode)
DC output voltage  19V
Noise + Ripple  300mVp-pmax (20 MHz bandwidth)
Load 0(min) 3.16A(max)
Output Ratings (CC mode)
DC output voltage 19V +/-1.0V for CV...

30Chapter 1
Hibernation Mode
Enter Hibernation Mode (suspend to HDD) 
when
1.Hibernation hot-key is pressed and 
system is ready to enter Hibernation mode
2.System Hibernation timer expires and 
system is ready to enter Hibernation mode.TAll power shuts off
Display Standby Mode
Keyboard, built-in touchpad, and an external 
PS/2 pointing device are idle for a specified 
period.
TThe display shuts off
Hard Disk Standby Mode
Hard disk is idle within a specified period of 
time.
THard disk drive is in...

Chapter 131