Acer Extensa 650 Maintenance Manual

                                                                                                                         Installation  2-11  
2.7  Installing the AC Power Adapter
Use the following procedures to connect the AC adapter to the system:
Caution: Use only the AC adapter supplied with the computer; other 
adapters can damage the unit.
1.  Remove the AC adapter from the packaging. Connect the round coaxial 
connector supplied with the notebook to the DC IN power receptacle on the 
left rear of...

2-12   Installation
back on to repeat self test. If the error message persists, refer to Section 5 for 
troubleshooting information.
2.9  Making Backups of System Software
Immediately after completion of the installation procedures, make backups of all 
software. In the event of a disk problem, restore the system using the System Files 
Recovery disk and the set of backup disks.
Note:  Refer to the Extensa  Series Notebook Computer User’s Guide for 
additional information. 

                                                                                                    Operating Instructions  3-1
3
Operating Instructions
3.1 Introduction
This section contains a summary of notebook operating procedures useful for 
maintenance operations. For additional detail, refer to the Extensa Series Notebook 
Computer User’s Guide supplied with the notebook.
3.2 Controls/Indicators
The operating controls and indicators for the 60x and 65x Series Notebooks are 
identical (refer to...

3-2   Operating Instructions 
3.2.1 Power On/Off Switch
The notebook contains an alternate action power button located on the right side of 
the notebook as shown in Figure 3-1.  On the first button depression, power is turned 
on to the notebook. On the second depression, power is turned off.
3.2.2 Notebook LEDs
The notebook contains four front indicator LEDs and two right side LEDs as shown 
in Figure 3-1 and described in Table 3-1.
Table 3-1  60x/65x Series Indicators
3.2.2.1 Hot Key Sequences
Table...

3-3   Operating Instructions 
Table 3-2  Summary of Notebook Hot Key Sequences
Function Key Sequence
Increase LCD screen brightness Fn-Up Arrow
Decrease LCD screen brightnessFn-Down Arrow
Lighten LCD screen contrastFn-Right Arrow
Darken the LCD screen contrastFn-Left Arrow
Alternate between display modes (LCD, Ext.l CRT or both)Fn-F12
Enter 0V Suspend ModeFn-F2
Exit 0V Suspend ModePress Power Button
Enter Standby ModeFn-F4
Resume from Standby ModePress any key 
Toggle speaker output on/offFn-End
Numeric...

                                                                                                              Theory of Operation  4-1  
4
Theory of Operation
4.1 Introduction
This section contains a general block diagram theory of operation description of the 
Extensa 60x/65x Series Notebook Computers.
Note: Various internal components may change on future models and busses/
bus speeds are subject to change.
4.2 Notebook Functional Overview
The Extensa 60x/65x Series Notebooks consist of eight major...

4-2   Theory of Operation
Figure 4-1  Extensa Functional Block Diagram
4.2.1 System Processor
The System Processor function for the notebook is implemented on the Motherboard  
in the form of an Intel Pentium P54-C Superscalar 586 Processor Chip. The processor 
operates in conjunction with RAM and ROM Memory and other control logic  to process 
software instructions (BIOS, DOS, Windows, and applications).  The processor 
communicates with the hard disk drive and the memory components using high speed...

                                                                                                              Theory of Operation  4-3  
4.2.2 Memory Subsystem
The memory subsystem comprises the following components:
¨Main memory
¨L2 Secondary Memory (cache)
¨Flash ROM
The Extensa Series uses fast Extended Data Out (EDO) DRAM for main and video 
memory and high-speed synchronous, pipelined burst SRAM  for L2 cache memory. 
Main BIOS and Video BIOS are stored in Flash ROM.
4.2.2.1 Main Memory
The standard...

4-4   Theory of Operation
video section also uses additional levels of write FIFOs, a read cache, page mode DRAM.
4.2.4   Sound Subsystem
The Extensa  Series Notebook is equipped with a sound chip set that is Sound BlasterTM 
and Sound Blaster Pro  compatible.  Internal stereo speakers provide the Notebook with  
sound generation capabilities. A set of 3.5 mm connectors allow for external microphone 
and line inputs and headphone/speaker outputs.
The sound subsystem also includes a variety of  sound...