Acer Aspire 9420 Service Guide

Chapter 141
AC Adaptor
Hard Disk Drive
ItemSpecification
Model name LiteOn PA-1900-04AW Delta 90W ADP-90SB BBAA
Input feature
Rated voltage for 100Vac or 240Vac input AC 
voltagefor 100Vac or 240Vac input AC 
voltage
Input voltage range from 90Vac to 264Vac from 90Vac to 265Vac
Rated frequency for 50Hz or 60Hz for 50Hz or 60Hz
Frequency range from 47Hz to 63Hz from 47Hz to 63Hz
Steady AC current less than 1.5A rms at 100Vac input 
and maximum loadless than 1.5A rms at 100Vac input 
and maximum load...

42Chapter 1
Average seek, 
write (msec. 
typical)14.5
Cache buffer 8 Mbytes
Interface Serial ATA
Startup current 
(typical, peak)+5V: 1.1 amps
Ambient 
temperature5 to 55
oC (operating), -40 to 70oC (nonoperating)
Temperature 
gradient (
oC per 
hour max.)20
oC (operating), 30oC (nonoperating)
Relative humidity 5% to 90% (operating), 5% to 95% (nonoperating)
Relative humidity 
gradient30% per hour max.
Drive acoustics, 
sound power 
(bels) idle2.4 (typical), 2.6 (max)
Shock, operating 
(Gs max. at 0.5...

Chapter 143
24X Combo Drive Interface
ItemSpecification
Model PHILIPS SCB5265 LITEON SSC-2485K
Performance Specification
Transfer rate (KB/sec.) Sustained:
•  DVD: Max 10.56Mbytes/sec.
•  CD: 3600Kbytes/sec.Sustained:
•  DVD: Min 10.15Mbytes/sec.
•  CD: 3500 Kbytes/sec.
Access Time (Typical)
•  DVD: Random Access: 125 ms
•  DVD: Full Stroke: 165ms
•  CD: Random Access:105ms
•  CD: Full Stroke:160ms
•  DVD: Random Access: 100 ms
•  DVD: Full Stroke: 190ms
•  CD: Random Access:95ms
•  CD: Full...

44Chapter 1
8X DVD Dual Interface
ItemSpecification
Vendor and model name PHILIPS SDVD8441
Performance specification
Transfer rate (KB/sec.) Sustained:
•  DVD:10.9Mbytes/sec. (Typ)
•  CD: 3650Kbytes/sec. (Typ)
Access time (typical)
•  DVD: Random Access: 130 ms
•  DVD: Full Stroke: 240ms
•  CD: Random Access:130ms
•  CD: Full Stroke:240ms
Buffer memory 2MB
Interface ATA/ATAPI-5
Applicable disc format
•  DVD (read): DVD-ROM 5,9,10,18, DVD-VIDEO, DVD-AUDIO, DVD-R, DVD-R 
3.95G, DVD-R MULTI BORDER, DVD-RW,...

Chapter 145
8X Super Multi (DL)
ItemSpecification
Vendor and model name Liteon SSM 8515S Pioneer DVR-K06RS Philip SDVD-8821
Performance Specification
Transfer rate read (KB/sec.) Sustained:
•  DVD: 10.00Mbytes/
sec.
•  CD: 3500kbytes/sec.Sustained:
•  DVD: 10.80Mbytes/
sec.
•  CD: 3600kbytes/sec.Sustained:
•  DVD: 10.90Mbytes/
sec.
•  CD: 3650kbytes/sec.
Access time / Seek time
•  DVD: random access 
130ms
•  DVD: full stroke 250ms
•  CD: random access 
110ms
•  CD: full stroke 220ms
•  Access time: DVD...

Chapter 246
BIOS Setup Utility
The BIOS Setup Utility is a hardware configuration program built in the BIOS (Basic Input / Output System) of 
computer. Generally speaking, the computer is already properly configured and optimized, and you do not need to 
run this utility.
However, if you encounter configuration problems, you may need to run Setup. Otherwise, you can also refer to 
Chapter 4 Troubleshooting when problem arises.
Invoking BIOS Setup
To activate the BIOS Utility, press F2 during POST (when...

47Chapter 2
Information
•CPU type: This item will show the CPU information of the system.
•CPU speed: This item will show the COU clock speed.
•IDE1 model name: This item will show the model name of HDD installed on primary IDE master. The hard 
disk model name is automatically detected by the system. If there is no hard disk present or unknown 
type, “None” should be shown on this field.
•IDE1 serial number: This item will show the serial number of HDD installed on Primary IDE master. If no 
hard disk...

Chapter 248
Main
•System Time and System Date: The hours are displayed with 24-hour format. The changes in these two 
items take effect immediately.
•System Memory: This item reports the memory size of system base memory. The size is fixed to 640KB.
•Extended Memory: It reports the memory size of the extended memory in the system. The extended 
memory size is equal to total memory size (one MB).
•Video Memory: It indicates the video memory size.
•Quiet Boot:
•Enabled: Customer Logo is displayed, and...

49Chapter 2
device sequence will be the same as the one defined in the BIOS setup (Boot option).
•D2D Recovery: It allows the users to enable or disable the disk-to-disk recovery. 

Chapter 250
Security
The system supports three levels of password protection. The password support consists of a Supervisor 
Password, User Password, and Hard Disk Password. All the passwords are stored in a non-volatile storage device 
(EEPROM).
•Password Policy: All the passwords will obey the following rules:
•All the passwords can be set or cleared in BIOS Setup Security screen.
•The password entry consists of eight alphanumeric characters. At least one character must be 
assigned.
•The valid keys...