Here are 10 examples of hand tools used in computer hardware and servicing: 1. Screwdrivers - flathead, Phillips head 2. Nut drivers - for different sized nuts 3. Pliers - regular, needle-nose, wire cutters 4. Wrenches - open-end, box-end, Torx 5. Anti-static wrist strap - to prevent electrostatic discharge 6. Tweezers - for small components 7. Brushes - for dusting 8. Thermal grease or paste - for applying to CPUs 9. Cables - for connecting components 10. Multimeter - for testing voltages

1. Identity the following pictures:
System Unit Power Supply
Motherboard CPU

2. COMPONENTS
OF A SYSTEM
UNIT

3. At the end of the lesson, the learners
should be able to:
a.Identify the components of a system unit;
b.Describe the function of each component
of a system unit
c.Value the importance of each components
of a system unit.

4. DIFFERENT COMPONENTS OF A COMPUTER
SYSTEM
System unit – the
main part of a
microcomputer,
sometimes called
chassis.

5. Motherboard/ Mainboard/
System Board- the main
circuit board of a computer.
It contains all the circuits
and components that run
the computer.

6. 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.

7. 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.
Physically, primary storage is a
collection of RAM chips.

8. 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. They are often used
to permit upgrading to a new
different hardware.

9. 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.

10. Power Supply Unit (PSU) –
installed in the back corner of
the PC case, next to the
motherboard. It converts 120v
AC (standard house power) into
DC voltages that are used by
other components in the PC.

11. Group Activity
1
4
3
2

12. Assessment
Directions: Arrange the jumbled letters to form the words related to our topic,
based on the given functions.
1. Installed in the back corner of the PC case, next to the motherboard. It converts 120v AC (standard
house power) into DC voltages that are used by other components in the PC.
W P E O R P U P S Y L
Power Supply
2. The main part of a microcomputer, sometimes called chassis.
T Y E M S S I N U T
System Unit
3. The main circuit board of a computer. It contains all the circuits and components that run the
computer.
O M E H T R R O A B D
Motherboard
4. 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.
E N C T R L A R P O S S C E N G I N T U I
Central Processing Unit

13. ASSIGNMENT:
List down at least ten (10) examples of hand tools
used in computer hardware and servicing. Write
your answers on one fourth sheet of paper. Be able
to pass it next meeting.