MICHAEL ANGELO M.

ALIANGAN, LPT
This course is designed to develop knowledge,
skills, and attitudes of a Computer Service
Technician in accordance with industry
standards. It covers basic and common
competencies such as installing, maintaining,
configuring, and diagnosing computer
systems and networks.
LO 1. Assemble computer hardware
1.1 Plan unit assembly to ensure OHS
policies and procedures are
followed in accordance with
systems requirements
1.2 Prepare unit assembly to ensure
OHS policies and procedures are
followed in accordance with
systems requirements
 Occupational Health and Safety Policy

- Occupational health and safety is a cross-

disciplinary area concerned with protecting the
safety, health and welfare of people engaged in
work.

- Safety practices should be learned early and

always adhered to when working with any
electrical device, including personal computers
and peripherals.
Computer equipment can be dangerous, and
you or others can be injured or even killed if
you don’t follow proper safety guidelines
when working along PC’s. The following are
some precautionary measures to take before
working with any computer equipment:
Before you start to work on the computer,
perform the following steps in the sequence
indicated:
1. Turn off the computer and all peripherals.
2. Touch an unpainted metal surface on the
computer chassis, such as the metal around
the card-slot openings at the back of your
computer, before touching anything inside
your computer.
3. Disconnect the computer and peripherals
from their electrical outlets. Doing so
reduces the potential for personal injury or
shock. Also disconnect any telephone or
telecommunication lines from the computer.
 OHS or
Occupational
Health and Safety
refers to the legislation, policies,
procedures and activities that aim to
protect the health, safety and welfare of
all people at the workplace.
1. Do not work alone so that there's 8. Hold the components on the edges
someone who can take care of you in and do not touch the Integrated Circuit
case of emergency. (IC) parts.
2. Always power off the computer and 9. Always wear personal protective
unplug the computer before working on equipments (PPE) in accordance with
it. the organization's OHS procedures and
3. Take away any liquid near your working practices.
area to avoid getting electrocuted or 10. Make sure that the pins are properly
accidentally damaging computer parts. aligned when connecting a cable
4. Be careful with tools that may cause connector.
short circuit. 11. Contingency measures during
5. Always ground or discharge yourself workplace accidents, fire and other
before touching any part of the emergencies are recognized.
computer. 12. Use brush, compressed air or blower
6. Do not use excessive force if things in cleaning the computer system.
don't quite slip into place.
7. Clean the area before and after using it
to maintain sanitation and prevent
accidents.
13. Wear shoes with non-conductive rubber
soles to help reduce the chance of being
shocked or seriously injured in an
electrical accident.
14. Do not work on components that are
plugged into their power source.
15. Do not remove expansion cards from a
computer when it is turned on.
16. Remove all jewelry when working inside
any computer related equipment.
17. Be sure not to mix electronic
components and water.
18. When you shut down your computer, be
sure to shut it down properly. Do not turn
it off with the case switch.
19. Don’t eat or drinks while working.
 During installation and initial test,
careful planning and preparation are to
be done to avoid personal injury and
damages to wiring due to sharp
pins on connectors and printed
circuit assemblies, rough chassis
edges and corners, and hot
components.
VIOLATION OF PRIVACY
 IMPACT ON LABOR FORCE
 HEALTH RISKS
 PUBLIC SAFETY
 IMPACT ON ENVIRONMENT
Direction: Identify the Precautions and
Procedures write TRUE if the statement is
correct and otherwise FALSE.
1) Failure to do the proper jumper
setting may cause damage to your
CPU.
2) After adding and removing any other
system components, make sure that
you unplug your power supply.
3) Test the computer, insuring that it
meets the necessary system
requirements before booting up.
4) With an effective cooling fan, the
CPU can overheat and cause damage
to both CPU and the motherboard.
5) After starting the installation, read
carefully the documentation and
procedures on any hardware and
software settings that may be
required.
 Select your answer on your notebook
about the effects of computer that will
correspond on the statement. Write
the correct word/s on your notebook.
1) Computer manufacturing processes
and computer waste are depleting
natural resources and polluting the
environment.
2) Although computers have improved
productivity in many ways and
created an entire industry with
hundreds of thousands of new jobs,
the skills of millions of workers and
managers have been replaced by
computers.
3) It is crucial that personal and
confidential records be protected
properly.
4) Adults, teen, and children around the
world are using computers to share
publicly their photos, videos,
journals, music, and other personal
information.
5) Prolonged or improper computer
use can lead to injuries or disorders
of the hands, wrists, elbows, eyes,
necks, and back.
1. TRUE 1. Impact on the Environment
2. FALSE 2. Impact on Labor Force
3. TRUE 3. Violation of Privacy
4. FALSE 4. Public Safety
5. FALSE 5. Health Risk
An Operating System (OS) is a set of programs
that manage computer hardware resources and
provide common services for application
software. The operating system is a vital
component of the system software in a computer
system. Application programs require an operating
system which are usually separate programs, but
can be combined in simple systems.
For hardware functions such as input and output
and memory allocation, the operating system
acts as an intermediary between application
programs and the computer hardware, although
the application code is usually executed directly
by the hardware and will frequently make a system
call to an OS function or be interrupted by it.
Operating systems are found on almost any device
that contains a computer from cellular phones and
video game consoles to supercomputers and web
servers.
 REAL-TIME
 MULTI-USER
 MULTI-TASKING VS SINGLE TASKING
 DISTRIBUTED
 EMBEDDED
TRUE or FALSE
TRUE or FALSE
TRUE or FALSE
https://itstillworks.com/64bit-operating-system-mean-
8379209.html

 x86 (32-bit) operating system

 x64 (64-bit) operating system

 “BIT” (Binary digit)

- simplest unit of data
https://itstillworks.com/64bit-operating-system-mean-
8379209.html

 WORD SIZE
- number of bits that a computer can
deal with at any time
 32-bit OS = 4,294,967,295 = 4GB
 64-bit OS = 17.2 billion gigabytes
https://www.techradar.com/reviews/pc-mac/software/operating-
systems?productBrand=All

 APPLE – mac/ios
 GOOGLE – android
 MICROSOFT – windows
Research Activity: (15 mins)
- Independently, using the link above, list all the
available operating systems brand and their
product/s
ttps://www.techradar.com/reviews/pc-
mac/software/operating-systems?productBrand=All

 FEDORA – fedora