Acer Aspire 1520 Service Guide

22Chapter 1
Average Full Access time (typ.) Random
CAV mode 110 msec typical 150 
msec average max
Full Stroke
CAV mode 200 msec typical 260 
msec average maxDVD-5:
Random
  120 msec typical
  160 msec average max
Full Stroke
  270 msec typical
  350 msec average max
DVD-9:
Random
  150 msec typical
  200 msec average max
Full Stroke
  340 msec typical
  450 msec average max
DVD-RAM (2.6G)
Random
   200 msec typical
   300 msec average max
Full Stroke
   300 msec typical
   600 msec average max
DVD-RAM...

Chapter 123
Transfer rate (KB/sec) Read Sustained:
           DVD-ROM  MAX 8X CAV (MAX 10800 KB/sec)
           CD-ROM    MAX 24X CAV (MAX 3600 KB/sec)
Write:
           CD-R          4X, 8X (CLV), Max 16X, MAX 24X (ZCLV)
           CD-RW       4X (CLV)
           HS-RW       4X,8X, 10X (CLV)
ATAPI Interface:
           PIO mode  16.6 MB/sec :PIO Mode 4
           DMA mode 16.6 MB/sec:Multi word mode 2
           Ultra DMA mode 33.3MB/sec: Ultra DMA mode 2
Buffer rate 2MB
Access time DVD-ROM 180 ms typ....

24Chapter 1
Disc Diameter 12cm and 8cm
Capacity 2048 bytes/sector (DVD)
2048 bytes/block (CD Mode-1 and Mode-2 Form-1)
2336 bytes/block (Mode-2)
2328 bytes/block (Mode-2 Form-2)
Operation environment for “write/rewrite” application
Host Machine IBM compatible PC (Pentium 166 MHz or above)
OS MS-Windows 90/ME/2000/XP/NT 4.0
Memory Min. 128MB required
Hard Disk Empty Storage Capacity:100 MB or more
Average access time: 20ms or less
Disc Diameter 12cm and 8cm
Recommended MediaCD-R:
AMT, CMC, Csita, Delphi,...

Chapter 125
  
  
Loading mechanism Manual load/DC brushless mortor system
Audio Interface
ItemSpecification
Audio Controller VT 1612A
Audio onboard or optional Built-in
Mono or Stereo Stereo
Resolution 20 bit stereo Digital to Analog converter
18 bit stereo Analog to Digital converter
Compatibility Microsoft PC98/PC99, AC97 2.1
Mixed sound source Line-in, CD, Video, AUX 
Voice channel 8/16 bit, mono/stereo
Sampling rate 44.1 KHz
Internal microphone Yes
Internal speaker / Quantity Yes/2
Supports PnP DMA...

26Chapter 1
 
 
1600x1200 CRTTrue image True image True image True image True image True image
Video Memory
ItemSpecification
Fixed or upgradeable Fixed for UMA
upgradeable for NVIDIA
® GeForceTM FX Go5200/5700
Video memory size 64MB
LCD Display Resolution
Resolution8 bit 
(256colors)16 bits
(Hi color)24 bits
(True color)32 bits
(True color)
640x480 Yes Yes Yes Yes
720x480 Yes Yes Yes Yes
800x600 Yes Yes Yes Yes
848x480 Yes Yes Yes Yes
1024x768 Yes Yes Yes Yes
CRT Display Resolutions
Resolution8 bit...

Chapter 127
 
  
Optional parallel port IRQ 
(in BIOS Setup)IRQ5, IRQ7
USB Port
ItemSpecification
USB Compliancy Level 1.1/2.0 support
OHCI USB 2.0
Number of USB port 4
5V/500 mA per slot
Location Rear side
Other Remarks 3 independent OHCI USB1.1 Host Controller and 1 EHCI USN2.0 
Host Controller. 
PCMCIA Port
ItemSpecification
PCMCIA controller TI PCI 7420
Supports card type Type II, Tpye III
Number of slots Two type II, one type III
Access location Left side
Supports ZV (Zoomed Video) port Yes
Supports...

28Chapter 1
Screen Diagonal (mm) 390.1 391 391
Active Area (mm) 331.2x207.0 331.2x207.0 331.2x207.0
Display resolution (pixels) 1280x800 WXGA 1280x800 WXGA 1280x800 WXGA
Pixel Pitch 0.2588x0.2588 0.2588x0.2588 0.25875x0.25875
Pixel Arrangement R.G.B. Vertical Stripe R.G.B. Vertical Stripe R.G.B. Vertical Stripe
Display Mode Normally White Normally White Normally White
Typical White Luminance (cd/m
2)
also called Brightness185 195 min (5 point 
average)
220 Typ. (5 point 
average)185
Luminance Uniformity...

Chapter 129
 
Over Voltage Protection (OVP) 29V
Short circuit protection 9.5A @19V output voltage
Electrostatic discharge (ESD) 15KV (at air discharge)
8KV (at contact discharge)
Dielectric Withstand Voltage
Primary to secondary 2150VDC for 1 sec.
Ground leakage current  less than 250uA
Power Management 
Power Saving ModePhenomenon
Standby Mode
Enter Standby Mode when
1.Standby/Hibernation hot-key is pressed 
and system is not ready to enter Hibernation 
mode.
2.System standby/ Hibernation timer expires...

30Chapter 1
Mechanical Specification
ItemSpecification
Dimensions 361(W) x 292.5(D) x 47.3(H)mm
Weight 3.6kg (8lbs)
I/O Ports Two Type II or one Type III PC CardBus (PCMCIA) slot
One IEEE 1394 port
One FIR port
One RJ-11 modem jack (V.92, 56K)
One RJ-45 network jack
One DC-in jack
One parallel port (ECP/EPP)
One S-video port
One external monitor port
One microphone-in jack (3.5mm mini jack)
One headphone jack (3.5mm mini jack)
Four USB 2.0 ports
Drive Bays One
Material Plastic
Indicators Wireless...

Chapter 131