Acer Extensa 500 Service Guide

Chapter 121
Video Memory
ItemSpecification
Fixed or upgradeable Fixed, built-in NM2097B video 
controller 
Video memory size 2MB
Cache Memory
ItemSpecification
Cache controller ALi M1531
Tag RAM location U32
Tag RAM size 32 KB 
Tag RAM voltage 3.3V
SRAM type PBSRAM
SRAM size 512 KB
SRAM location U37
SRAM configuration 64K*64 x1
SRAM speed Cycle time = 7ns
SRAM voltage 3.3V
1st level cache control Always enabled
2st level cache control Always enabled
Cache scheme control Fixed in write-back
Video...

22
System Introduction 
640x480x256 85 60
640x480x64K 85 60
640x480x16M 85 60
800x600x256 85 60
800X600X64K 85 60
1024x768x256 60, 75 60
Parallel Port
ItemSpecification
Parallel port controller NS PC97338VJG
Number of parallel ports 1
Location Rear side
Connector type 25-pin D-type connector, in female 
type. 
Parallel port function control Enable/Diable by BIOS Setup
Supports ECP  Yes (set by BIOS setup)
Optional ECP DMA channel 
(in BIOS Setup)DMA channel 1
DMA Channel 3
Optional parallel port I/O...

Chapter 123
Audio
ItemSpecification
Audio Controller Yamaha YMF715E
Audio onboard or optional Built-in
Mono or Stereo Stereo
Resolution 16-bit
Compatibility SB-Pro, Windows Sound System 
(WSS), MPU-401, OPL3, OPL3-SA3
Mixed sound source Voice, Synthesizer, Line-in, 
Microphone, CD
Voice channel 8-/16-bit, mono/stereo
Sampling rate 44.1 KHz
Internal microphone Yes, on the left-higher corner of LCD 
panel
Internal speaker / Quantity Yes / 2 pieces, on both hinge sides
Supports PnP DMA channel DMA channel...

24
System Introduction 
Supports modem protocol V.90 data modem, V.90 fax modem, 
audio mode, and digital line protection 
operation
Modem connector type RJ11
Modem connector location Right side
Keyboard
ItemSpecification
Keyboard controller Mitsubishi M38867
Keyboard vendor & model name API
Total number of keypads 84-/85-/89-key
Windows 95 keys Yes
Internal & external keyboard work 
simultaneouslyYe s
Diskette Drive
ItemSpecification
Vendor & model name Misumi  D353F3 
Floppy Disk Specifications
Media...

Chapter 125
 
Drive Format
Capacity (MB) 3240 3240 4320
Bytes per sector 512 512 512
Logical heads 16 16 15
Logical sectors 63 63 63
Drive Format
Logical cylinders 6282 6304 8944
Physical read/write heads 3 5 4
Disks 6 3 2
Spindle speed (RPM) 4000 4000 4200
Performance Specifications
Buffer size  128KB 512KB 512KB
Interface IDE(ATA-3) IDE IDE(ATA-4)
Data transfer rete (disk-
buffer, Mbytes/s)6.0~9.1 6.4~10.4 7.7~12.8
Data transfer, rate 
(host~buffer, Mbytes/s)16.6 
  (P IO m o de  4 )16.6  (PIO mode 4)...

26
System Introduction 
 
 
Input Voltage  5 V
Battery Pack
ItemSpecification
Vendor & model name Panasonic BTP-1831
Toshiba BTP-1731
Battery Type NiMH
Pack capacity  3500 mAH
Cell voltage  1.2 V
Number of battery call 8
Package configuration 8 cells in series
Package voltage 9.6 V
DC-DC/Charger Board
ItemSpecification
Vendor & model name Ambit T62.101.C.00/01
Input voltage AC adapter: 19V-26V
Battery: 7.5V-13V
DC/DC converter output
Output rating 5V 3.3V +12V 6V 3.3V
SB
Current (w/load, A) 0~5.8 0~3.3...

Chapter 127
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 one of a different brand, use Inverter ID utility to 
update the ID information.
LCD Inverter...

28
System Introduction 
Electrical Specification
Supply voltage for LCD 
display (V)3.0~3.6 (typ.) 3.3 (typ.)
Supply voltage for LCD 
backlight (Vrms)650 (typ), 660 (max.) 650 (typ)
Power Adapter
ItemSpecification
Vendor & model name Delta ADP-45GB Rev. E5
Input Requirements
Maximum input current (A, @90Vac, 
full load)1.5 A
Nominal frequency (Hz) 47 - 63
Frequency variation range (Hz) 47 - 63
Nominal voltages (Vrms) 90 - 264
Inrush current The maximum inrush current will be 
less than 50A and 100A when...

Chapter 129
Primary to secondary 3000 Vac (or 4242 Vdc), 10 mA for 1 
second
Leakage current  0.25 mA max. (@ 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)
Power Adapter
ItemSpecification 

30
System Introduction 
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...