10
Republic of the Philippines
Department of Education
NATIONAL CAPITAL REGION
Misamis Street, Bago-Bantay, Quezon City
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
(USLeM)
(COMPUTER SYSTEMS SERVICING NC II)
QUARTER 4 – MODULE 1
Development Team of the Module
Writers:
Content Editors:
Language Editor:
Management Team:
Mr. Romeo T. Navarro Jr.
Mr. Gregorio S. Quineri
Dr. Valentina A. Ballesteros
Wilfredo E. Cabral, Regional Director – NCR
Dr. Dominico C. Idanan, Schools Division Superintendent
Micah Pacheco, OIC-CLMD Chief – NCR, EPS Science NCR
Madeline Ann L. Diaz, CID Chief SDO MuntinlupaCity
James A, Roldan, EPS TLE – NCR
Dennis M. Mendoza, LR EPS – NCR
Nancy C. Mabunga, Librarian – NCR
Dr. Valentina A. Ballesteros, EPS-SDO Muntinlupa City
Dr. Gina U. Urquia, LR EPS SDO Muntinlupa City
This is a Government Property. Not For Sale
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
PREVENTIVE MAINTENANCE OF COMPUTER SYSTEM
EXPECTATIONS
At the end of the module, you should be able to:
1. check the normal function of computer systems or devices
2. inspect the functionality of components in and out of the system unit.
3. respond to unplanned events or system failures.
PRE-TEST
Directions: Choose and write the letter of the correct answer on a separate sheet of paper.
1. It is known as a battery backup, provides backup power when your regular power source
fails, or voltage drops to an unacceptable level.
A. AVR
B. EMI
C. Surge protector
D. UPS
2. What maintenance is regularly performed on a piece of still working equipment to lessen
the likelihood of failing?
A. active
B. passive
C. permissive
D. preventive
3. What is the ideal operating temperature for a device environment?
A. 0°C
B. 23°C
C. 36°C
D. 100°C
4. It can cause a degradation of electronic circuitry inside the device.
A. AVR
B. EMI
C. Surge protector
D. UPS
5. What keys stick when pressed and produced repeated characters?
A. disconnected
B. jammed
C. stuttering
D. unfunctional
(This is a Government Property. Not
for Sale.)
Page 1
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
6. What tool is used to wipe different components without scratching or leaving debris?
A. air blower
B. brush
C. cable ties
D. microfiber cloth
7. It is an electronic device that maintains a constant voltage level to electrical equipment.
A. AVR
B. EMI
C. Surge protector
D. UPS
8. What PM consists of activities that promote a longer trouble-free life for the device?
A. active
B. dynamic
C. passive
D. tactile
9. What keys are stuck and generate any character?
A. disconnected
B. jammed
C. stuttering
D. unfunctional
10. What is a tool that provide static protection to devices?
A. AVR
B. EMI
C. ESD
D. UPS
LOOKING BACK
Directions: Write TRUE if the statement is correct, otherwise write FALSE. Write your correct
answer on a separate sheet of paper.
1. Windows Firewall filters information coming to your system from the Internet
and blocking potentially harmful programs or network-based threats.
2. Access Panel is a component of Microsoft Windows that provides the ability
to view and change system settings.
3. User account is an identity created for a person in a computer system.
4. Remote screen refers to a software that allows a personal computer's
environment to be run remotely on one system, while being displayed on a
separate client device.
5. Container is a subdivision within an Active Directory into which you can place
users, groups, computers, and other organizational units.
(This is a Government Property. Not
for Sale.)
Page 2
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
BRIEF INTRODUCTION
Preventive Maintenance is a regular and systematic inspection, detection, and
correction of possible problems in order to prevent future system failures on a working device.
The following are its aims:



Ensures that the device operates properly.
Lessen the likelihood of a system crash or parts failures.
Prolong the life of the device and its individual components.
By implementing this procedure, it will reduce the device down time, increased data
protection, extend life of the device and its components, increased stability and save on regular
repair and replacement costs.
Two Types of Preventive Maintenance
1. Passive Preventive Maintenance - it consists of precautionary activities to protect the
computer from the environment. Like the following:
 Using power-protection devices such as Uninterrupted Power Supply (UPS) and
Automatic Voltage Regulator (AVR).
 Clean and temperature-controlled environment.
 Preventing excessive vibration.
2. Active Preventive Maintenance - it consists of activities that promote a longer troublefree life for the device. Like the following:
 Periodic cleaning of the device and components.
 Performing regular file back-up.
 Scanning of malwares (virus, spyware, and worms).
 Disk cleanup and file defragmentation of hard drives.
Note: Preventive Maintenance procedures can be a hardware and software related or both.
Maintenance
Tasks
Hardware



Checking cable, component, and peripherals conditions.
Replace or repair component that show signs of excessive wear.
Keeping components clean and on peak condition.
Software





Review security settings, software, and driver updates.
Scan and update antivirus or malware software.
Defragment hard drives
Scan drives for errors.
Remove unwanted or not used programs.
(This is a Government Property. Not
for Sale.)
Page 3
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
Safe Environment for Devices
The following are some tips for creating a safe environment for your devices.




Place the devices and components in a cool and dry place away from direct sun light.
Ideal operating temperature for a device environment is 23°C/73°F.
Always use an Uninterruptable Power Supply (UPS), Automatic Voltage Regulator
(AVR) or power surge protector to protect your devices from electrical spikes or power
interruption.
Provide a good airflow for the system unit to prevent it from overheating.
Keep your devices from Electromagnetic Interference (EMI), which can cause a
degradation of electronic circuitry inside the device or circuitry failures
Device Cleaning
Cleaning the device is essential to keep it on peak condition, extend its life and make
the files and data safe. A system unit in a normal working environment should be cleaned at
least annually. The table below gives examples of a Preventive Maintenance schedule:
Schedule
Component/Device
Maintenance

Keyboard

Monthly
Mouse
Monitor
Extension, AVR/ UPS
Annually
System Unit
Clean the interior with compressed air or
blower while use a clean cloth and alcohol
to clean the keys.
Check and repair for sticky or stuck key.

Clean the mouse with a microfiber cloth
and alcohol.

Clean the screen surface using a microfiber
cloth and LED/LCD cleaning solution.

Check for any deterioration, burns or cut on
the wires and sockets.

Use an air blower or compressed to remove
dust or debris. Or use a brush ang a cloth
as an alternative.
Before starting your cleaning activity, make sure that you have gathered all the
necessary cleaning tools and materials. For the review of these tools and materials, you can
open this link: https://bit.ly/3ty9Qvz
(This is a Government Property. Not
for Sale.)
Page 4
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
ACTIVITIES
Directions: Using your smartphone, tablet, or any recording device. Make a short video tutorial
on how to maintain good functionality of one of the following components or devices
but not limited to (keyboard, mouse, monitor, system unit, or laptop). Keep your
tutorial short with a minimum of 3 minutes and a maximum of 4 minutes. Turn-in
or submit your video on your respective Google Classroom.
Note: The video tutorial should include the following:
 Introduction or description of the opponent or devices
 Tools to use
 Safety precautions
 Procedures
Additional Information: open this link: https://bit.ly/PMWeek1
Your output will be rated using the Rubrics:
5 Points:
Exceeds
Expectations
Extremely
enthusiastic,
motivating, obvious
interest in activity
presented, clear,
audible voice
Firm grasp on
knowledge and
understanding of the
topic being presented,
showed complete
knowledge, covered
all important facts
4 - 3 Points:
Meets Expectations
2- 1 Point:
Needs Work
Showed little enthusiasm,
little interest in activities
being presented, somewhat
audible.
No enthusiasm, no
interest in activities being
presented, barely audible
Some knowledge and
understanding of the topic
presented missing a few
important facts
Demonstrated little
knowledge or
understanding of the topic
being presented.
Organization
Instructed in easy-tofollow sequence,
organized, well
planned out
Somewhat organized, easy
to follow
Unorganized, confusing,
hard to follow, not planned
out
Creativity
Excellent sense of
design. Smooth
transitions are
appropriate and aid in
delivery of the
presentation.
Minimal use of design
elements. No transitions.
Graphics, transitions,
clips, backgrounds and
sounds detract from the
content.
Sourcing
Citations for the
sources were
included.
Citations for some of the
sources used were
included.
No citations of the
sources were included.
Presentation
Content
Score
TOTAL:
(This is a Government Property. Not
for Sale.)
Page 5
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
REMEMBER

A healthy and safe environment can play an important factor in keeping your personal
computer at peak condition. Heat, dust, and humidity can deteriorate your component
rapidly. Accumulation of these elements can slow down the performance of your system
and eventually lead to system failure. So regular inspection, detection, and correction
can greatly lessen or prevent future system failures.

Preventive Maintenance procedure may include maintaining the device’s cleanliness,
incorporating regular backup of files, and scanning for viruses and other malicious
programs.

Use the necessary Electrostatic discharge (ESD) tools every time you perform the
maintenance inside any device.
CHECKING YOUR UNDERSTANDING
Directions: Complete the statement below based on what have you learned.
1. In this module I have learned
2. I still have questions related to
3. I can help my classmate in
4. I can use disk management to
(This is a Government Property. Not
for Sale.)
Page 6
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
5. The most interesting thing I have learned is
POST-TEST
Directions: Choose and write the letter of the correct answer on a separate sheet of paper.
1. What tool is used to wipe different components without scratching or leaving debris?
A. air blower
B. brush
C. cable ties
D. microfiber cloth
2. It is an electronic device that maintains a constant voltage level to electrical equipment
on the same load.
A. AVR
B. EMI
C. Surge protector
D. UPS
3. It is known as a battery backup, provides backup power when your regular power
source fails, or voltage drops to an unacceptable level.
A. AVR
B. EMI
C. Surge protector
D. UPS
4. What is a tool that provides static protection to devices?
A. AVR
B. EMI
C. ESD
D. UPS
(This is a Government Property. Not
for Sale.)
Page 7
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
5. What preventive maintenance consists of activities that promote a longer trouble-free
life for the device?
A. active
B. dynamic
C. passive
D. tactile
6. What maintenance is regularly performed on a piece of still working equipment to
lessen the likelihood of failure?
A. active
B. passive
C. permissive
D. preventive
7. What is the ideal operating temperature for a device environment?
A. 0°C
B. 23°C
C. 36°C
D. 100°C
8. It can cause a degradation of electronic circuitry inside the device.
A. AVR
B. EMI
C. Surge protector
D. UPS
9. What keys stick when pressed and produced repeated characters?
A. disconnected
B. jammed
C. stuttering
D. unfunctional
10. What keys are stuck and generate any character?
A. disconnected
B. jammed
C. stuttering
D. unfunctional
(This is a Government Property. Not
for Sale.)
Page 8
UNIFIED SUPPLEMENTARY LEARNING MATERIALS
Grade 10 – (ICT-CSS)
_
_
REFERENCES
“Computer Hope's Free Computer Help.” Computer Hope's Free Computer Help. Accessed
April 10, 2020. https://www.computerhope.com/.
H&D INFOrmation TECHnology, Inc. (n.d.). Computer Hardware Servicing - Exploratory
Module.
Rosalie P. Lujero, K to 12 Basic Education Curriculum- Technology and Livelihood Education
Learning Module – Grade 10 - Information and Communications Technology Computer
Hardware Servicing CHS 10.
ANSWER KEY
PRE-TEST
LOOKINGBACK
POST-TEST
1. D
2. D
3. B
4. B
5. C
6. D
7. A
8. A
9. B
10. C
1.
2.
3.
4.
5.
1. D
2. A
3. D
4. C
5. A
6. D
7. B
8. B
9. C
10. B
TRUE
FALSE
TRUE
FALSE
TRUE
(This is a Government Property. Not
for Sale.)
Page 9