CHS 9 For Action Research

ICT 9:

Computer Hardware Servicing

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION

COMPUTER SYSTEM, DEVICES AND PERIPHERALS

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

As an aspiring computer technician, it is very important

to know the system that runs your computer and

different devices attached to it. Each device plays an
important role, without each other computer system

will not work properly.

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MODULE 3, LESSON 1: PLAN AND
PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES
AND PERIPHERALS

What is an Operating System?

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The operating system is the most
important program that runs on

a computer.

Every general-purpose computer
must have an operating system

to run other programs.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Operating systems perform

basic tasks, such as recognizing
input from the keyboard, sending

output to the display screen,

keeping track of files and
directories on the disk, and

controlling peripheral devices

such as disk drives and printers.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

For large systems, the operating

system has even greater

responsibilities and powers.

It is like a traffic cop -- it makes sure

that different program and users
running at the same time do not

interfere with each other.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The operating system is also

responsible for security, ensuring

that unauthorized users do not

access the system.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Operating systems can be classified as follows:

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• Multi-user: Allows two or more users to run programs at the same time.

Some operating systems permit hundreds or even thousands of
concurrent users.

Linux

Unix

Windows 2000

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Operating systems can be classified as follows:

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• Multiprocessing : Supports running a program on more than one CPU.

Linux

Unix

Windows 2000

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Operating systems can be classified as follows:

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• Multitasking : Allows more than one program to run concurrently.

Unix

Windows 2000 and Windows multi point

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Operating systems can be classified as follows:

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• Multithreading : Allows different parts of a single program to run

concurrently.

Linux

Unix

Windows 2000 and Windows 7

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Operating systems can be classified as follows:

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• Real time: Responds to input instantly. General-purpose operating

systems, such as DOS and UNIX, are not real-time.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Operating systems provide a software platform on

which other application programs can run.

The application programs must be written to run on top

of a particular operating system.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Your choice of operating system, therefore, determines

to a great extent the applications you can run.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

For PCs, the most popular operating systems are DOS,
OS/2, and Windows, but others are available, such as

Linux.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

What are the devices of a computer?

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The physical, touchable, electronic and mechanical
parts of a computer are called the hardware which is

composed of different devices attached to the

computer.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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1. System Unit- The main part of a

microcomputer, sometimes called
the chassis. It includes the following
parts: Motherboard, Microprocessor,
Memory Chips, Buses, Ports,
Expansion Slots and Cards.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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2. Motherboard / Mainboard / System

Board- The main circuit board of a
computer. It contains all the circuits
and components that run the
computer.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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3. CPU (Central Processing Unit) - The

processor is the main “brain” or
“heart” of a computer system. It
performs all of the instructions and
calculations that are needed and
manages the flow of information
through a computer.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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4. Primary storage- (internal storage,

main memory or memory) is the
computer's working storage space
that holds data, instructions for
processing and processed data
(information) waiting to be sent to
secondary storage.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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4. Primary storage- Physically, primary

storage is a collection of RAM chips.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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Two (2) Types of Memory
a. ROM – (Read Only Memory) ROM is

non-volatile, meaning it holds data
even when the power is ON or OFF.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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Two (2) Types of Memory
b. RAM – (Random Access Memory)

RAM is volatile, meaning it holds
data only when the power is on.
When the power is off, RAM's
contents are lost.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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5. Expansion Bus - A bus is a data

pathway between several hardware
components inside or outside a
computer. It does not only connect
the parts of the CPU to each other,
but also links the CPU with other
important hardware.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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6. Adapters- Printed-circuit boards

(also called interface cards) that
enable the computer to use a
peripheral device for which it does
not have the necessary connections
or circuit boards.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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6. Adapters- They are often used to

permit upgrading to a new different
hardware.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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7. Power Supply Unit (PSU) - Installed

in the back corner of the PC case,
next to the motherboard. It converts
120vac (standard house power) into
DC voltages that are used by other
components in the PC.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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8. Hard Disk Drive (HDD) - In a

Windows computer, the hard drive is
usually configured as the C: drive
and contains the operating system
and applications.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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9. Optical Drive- An optical drive is a

storage device that uses lasers to
read data on the optical media.
There are three types of optical
drives: Compact Disc (CD), Digital
Versatile Disc (DVD) and Blu-ray Disc
(BD).

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The following list represents a basic set of devices found in most
Personal Computers.

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10.Digital Versatile Disc (DVD) -

Designed to optically access data
stored on a DVD. A laser moves back
and forth near the disk surface and
accesses data at a very fast rate.

MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

What are the input and output devices of a

computer?

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The devices attached to a personal computer can be

classified into two- the input and output devices.

Input Device is composed of a device that accepts data
and instructions from the user or from another computer

system.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

The devices attached to a personal computer can be

classified into two- the input and output devices.

Output device is any piece of computer hardware that
displays results after the computer has processed the

input data that has been entered.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

INPUT DEVICES

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Two (2) Types of Input Devices
1. Keyboard Entry – Data is inputted to the computer through a

keyboard.

Keyboard - The first input device developed for the PC.

Data is

transferred to the PC over a short cable with a

circular 6-pin mini-

din connector that plugs into the back of

the motherboard.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Two (2) Types of Input Devices
2. Direct Entry – A form of input that does not require data to be

keyed by someone sitting at a keyboard. Direct-entry devices
create machine-readable data on paper, or magnetic media,
or feed it directly into the computer’s CPU.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

1. Pointing Devices - An input device used to move the pointer

(cursor) on screen.

Mouse - The most common 'pointing device' used in
PCs. Every mouse has two buttons and most have one
or two scroll wheels.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

1. Pointing Devices - An input device used to move the pointer

(cursor) on screen.

Touch screen- A display screen that is sensitive to the
touch of a finger or stylus. Used in myriad applications,
including ATM machines, retail point-of-sale terminals,
car navigation and industrial controls. The touch screen
became wildly popular for smart phones and tablets.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

1. Pointing Devices - An input device used to move the pointer

(cursor) on screen.

Light Pen - A light-sensitive stylus wired to a video
terminal used to draw pictures or select menu options.
The user brings the pen to the desired point on screen
and presses the pen button to make contact.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

1. Pointing Devices - An input device used to move the pointer

(cursor) on screen.

Digitizer Tablet - A graphics drawing tablet used for
sketching new images or tracing old ones. Also called a
"graphics tablet," the user contacts the surface of the
device with a wired or wireless pen or puck. Often
mistakenly called a mouse, the puck is officially the
"tablet cursor."

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

1. Pointing Devices

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

2. Scanning Devices- A device that can read text or illustrations

printed on paper and translates the information into a form
the computer can use.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

3. Voice- Input Devices - Audio input devices also known as

speech or voice recognition systems that allow a user to send
audio signals to a computer for processing, recording, or
carrying out commands. Audio input devices such as
microphones allow users to speak to the computer in order to
record a voice message or navigate software.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Three Categories of Direct Entry Devices

3. Voice- Input Devices

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

OUTPUT DEVICES

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
1. Computer Display Monitor- It displays information in visual

form, using text and graphics. The portion of the monitor that
displays the information is called the screen or video display
terminal.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
1. Computer Display Monitor

a. CRT Monitors - Cathode Ray Tubes

(CRT) were the only type of displays for
use with desktop PCs. They are
relatively big (14" to 16" deep) and
heavy (over 15 lbs).

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
1. Computer Display Monitor

b. LCD Monitors – Liquid Crystal Display

(LCD) technology has been used in
laptops for some time. It has recently
been made commercially available as
monitors for desktop PCs.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
1. Computer Display Monitor

c. LED Monitors (Light Emitting Diode) - A

display and lighting technology used in
almost every electrical and electronic
product on the market, from a tiny
on/off light to digital readouts,
flashlights, traffic lights and perimeter
lighting.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
2. LCD Projectors- utilize two sheets of

polarizing material with a liquid
crystal solution between them.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
2. LCD Projectors- An electric current

passed through the liquid causes the
crystals to align so that light cannot
pass through them.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
2. LCD Projectors- Each crystal,

therefore, is like a shutter, either
allowing light to pass through or
blocking the light.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
3. Smart Board - A type of display

screen that has a touch sensitive
transparent panel covering the
screen, which is similar to a touch
screen.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
4. Printer - A device that

prints text or
illustrations on paper.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices

Types of printer

a) Ink-Jet or Bubble-Jet Printer - spays

ink at a sheet of paper. Ink-jet
printers produce high-quality text
and graphics.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices

Types of printer

b) Laser Printer - Uses the same

technology as copy machines. Laser
printers produce very high quality text
and graphics.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices

Types of printer

c) LCD and LED Printer- Similar to a

laser printer, but uses liquid crystals
or light-emitting diodes rather than a
laser to produce an image on the
drum.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices

Types of printer

d) Line Printer - Contains a chain of

characters or pins that print an entire
line at one time. Line printers are very
fast, but produce low-quality print.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices

Types of printer

e) Thermal Printer- An inexpensive

printer that works by pushing heated
pins against heat-sensitive paper.
Thermal printers are widely used in
calculators and fax machines.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Output Devices
5. Speakers - Used to play sound. They

may be built into the system unit or
connected with cables. Speakers
allow you to listen to music and hear
sound effects from your computer.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Aside from the devices attached on a PC, there are also
the so called storage devices that perform a special task

in computing system.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Floppy diskette- is a random access,

removable data storage medium that
can be used with personal computers.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Floppy diskette- The term usually

refers to the magnetic medium housed
in a rigid plastic cartridge measuring
3.5 inches square and about
2millimeters thick.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Floppy diskette- Also called a "3.5-

inch diskette," it can store up to 1.44
megabytes (MB) of data.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Compact disc (CD) – also called

optical disc is a nonmagnetic,
polished metal disk used to store
digital information. The disc is read by
the CD- ROM.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Digital Versatile Disc (DVD)- an

optical disc technology with a 4.7
gigabyte storage capacity on a single-
sided, one-layered disk, which is
enough for a 133-minute movie.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Jump drive and USB flash drive- is a

plug-and-play portable storage device
that uses flash memory and is
lightweight enough to attach to a key
chain. A USB drive can be used in place
of a floppy disk, Zip drive disk, or CD.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Hard drive- is the main, and usually

largest, data storage device in a
computer. The operating system,
software titles and most other files are
stored in the hard disk drive.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• LS-120- is a drive which supports a

special floppy diskette which can store
up to 120MB of information as well as
being backwards compatible and still
supporting the standard 1.44MB floppy
diskettes.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Types of storage devices

• Zip drive-is a small, portable disk

drive used primarily for backing up and
archiving personal computer files.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

ACTIVITY

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

Direction: In the puzzle on the next slide, look for the 10 hidden
computer devices and determine whether it belongs to INPUT,

OUTPUT or STORAGE DEVICE.

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

QUIZ

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MODULE 3, LESSON 1: PLAN AND PREPARE FOR INSTALLATION
COMPUTER SYSTEM, DEVICES AND PERIPHERALS

1. It serves as the brain of computer.

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2. Printed-circuit boards (also called

interface cards) that enable the computer
to use a peripheral device

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3. Also called read/write memory

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4. A small, portable disk drive used primarily

for backing up files

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5. The main circuit board of a computer

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6. Also called diskette

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7. Acts as a pointing device

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8. Device that makes sounds, clips and any

audio materials be heard.

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9. Component that reads and record data in

CDs and DVDs.

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10. It is a visual device that displays the

information

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ANSWER THESE QUESTIONS:

1. What are the different types of motherboard shown in the

video?

2. What are the different sizes of a motherboard?
3. What are the different types of CPU?

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ANSWER THESE QUESTIONS:

4. Describe the different types of memory cited in the video.
5. What do you think is the most efficient monitor used in our

computers nowadays?

6. Give at least 5 input devices featured in the video presentation.

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