LEARNING MATERIAL

8

Developed by: School Year: VANESA G. VIDALLON 2020 – 2021 KATHYRIN I. ODVINA

Special Program for Technical Vocational Education

COMPUTER SYSTEMS

SERVICING

LEARNING MATERIAL

Quarter 3

1

TABLE OF CONTENT

Pages Duration/Date

Introduction

Pre-Test 3-7 Week 1

Quarter 3

LESSON 5: USING HAND TOOLS

LO 1: Prepare hand tools

Information Sheet 1.1

Activity Sheet 1.1/1.2

Task Sheet 1.1

Self-Check 1.1

9-20 Week 1-2

LO 2: Use appropriate hand tools and test

equipment (Proper use of ESD tools)


Activity Sheet 2.1

Task Sheet 2.1

Self-Check 2.1

21-28 Week 3

LO 3: Maintain Hand Tools (Tools and Equipment

Maintenance)


Activity Sheet 3.1

Task Sheet 3.1

Self-Check 3.1

29-33 Week 4

LESSON 6: TERMINATING AND CONNECTING

ELECTRICAL WIRING AND ELECTRONICS CIRCUIT

LO 1: OHSPP (Identify hazards and risk)


Activity Sheet 1.1

Task Sheet 1.1

Self-Check 1.1

34-40 Week 5

LO 2: Resistor Color Code and Management


Activity Sheet 2.1

Task Sheet 2.1

Self-Check 2.1

41-45 Week 6

LO 3: ELECTRICAL CIRCUIT AND ELECTRICAL

WIRES, WIRE JOINTS AND SPLICING


Activity Sheet 3.1

Task Sheet 3.1

Self-Check 3.1

46-52 Week 7

2

LO 4: WIRE JOINTS AND SPLICING


Activity Sheet 4.1

Task Sheet 4.1

Self-Check 4.1

53-64 Week 8

3

PRE-TEST

MULTIPLE CHOICE

Direction: Choose the letter of the best answer. Write your answer on the space provided

before the number.

1. When compressed air is used to clean inside the computer, the air should be

_________around the components.

a. blown c. clean

b. compressed d. tighten

2. Clean computer cases and the outside of monitors with a mild cleaning solution

on a damp __________.

a. waste-free cloth c. dust-free cloth

b. damp cloth d. lint-free cloth

3. Clean the contacts on components with isopropyl alcohol

a. rubbing alcohol c. isopropyl alcohol

b. ethyl alcohol d. none of the above

4. What is the minimum distance of components when blowing using compressed

air?

a. 2 inches c. 4 inches

b. 3 inches d. 5 inches

5. When working around electronic devices, be sure that the tools you are using

have not been ___________.

a. pulverized c. sanitized

b. magnetized d. oxidized

6. What does CRT stands for?

a. cathion ray tube c. cathode ray tube

b. cathion rey tube d. cathode rey tube

7. A ___________needs to be able to properly use each tool in the toolkit.

a. technician c. plumber

b. electrician d. engineer

8. Do not spray any ________ inside the mouse.

a. solid c. fuel

b. gas d. liquid

9. Never use a _________vacuum cleaner inside a computer case.

a. sub-standard c. standard

b. average d. non-average

10. Used to tighten nuts in the same way that a screwdriver tightens screws.

a. Flat Screw Driver c. Philip Screw Driver

b. Hex Driver d. Screw Driver

4

11. Used to manipulate small parts.

a. Tweezers c. Screw Driver

b. ESD d. Anti-static mat

12. Most manufacturers can provide ____________for their equipment.

a. maintenance schedule

b. preventive maintenance

c. operational procedure

d. maintenance regulation

13. All tools and equipment must be properly maintained so that workers are not

_________.

a. endangered c. organized

b. protection d. hazard

14. The following are the successful maintenance program except:

a. well organized and scheduled

b. controls hazards

c. defines operational procedures

d. none of the above

15. Regulations require ____________of tools, machines and equipment before use.

a. inspection c. regulation

b. maintenance d. operation

16. A device for performing work on a material or a physical system using only hands.

a. hand tool c. diagnostic tool

b. cleaning tool d. hardware tool

17. The systematic care and protection of tools, equipment and machines

a. preventive maintenance c. maintenance program

b. organization d. regulation

18. The pencil can act as a _______ and may damage the computer components.

a. insulator c. inductor

b. conductor d. resistor

19. An excessive build-up of dust will act like a/an ________.

a. resistor c. insulator

b. inductor d. conductor

20. It can be harmful to data stored on magnetic media.

a. magnetic field c. land field

b. isolated field d. green field

21. The coating of the material to be soldered with a light coat of solder.

a. Thinner c. Tinning

b. Thining d. Tinhing

22. A plastic connector, used to insulate and secure the splice.

a. joint c. wire nut

b. resistor d. splice

5

23. Provide __________ to supervisor on hazards in work area in line with

organisational OHS policies and procedures

a. rule c. policy

b. report d. feedback

24. Tolerance value is indicated by the _________ band.

a. fourth c. second

b. third d. first

25. Good practices include:

a. Parts should be properly stored and can be labelled.

b. Use bins for storing small parts.

c. Consider making an individual responsible for the good maintenance tools and

parts.

d. None of the above

26. Resistance is measured by _______________.

a. Ohm c. Volts

b. Watts d. Ampere

27. You should wrap the strap around your ________ and secure it using the snap or

Velcro

a. Feet c. arm

b. Wrist d. hand

28. What tool will you use to loosen or tighten bolt with hexagonal head?

a. Flat screw c. hex driver

b. Philip screw d. hand only

29. The following tools can be used to place and retrieve parts that may be hard to

reach with your fingers except:

a. needle-nose pliers c. crimping tool

b. part retriever d. tweezers

30. A ___________is the joining of two or more wires by twisting them together.

a. splice c. bolts

b. joints d. nuts

31. The following are the benefits of proper storage of tools except:

a. Tools and parts are kept in good condition and are easy to find

b. Costs are reduced.

c. Productivity is increased because time is not wasted looking for tools, parts and

equipment.

d. None of the above.

32. The purpose of an antistatic wrist strap is to____________________.

a. Equalize the electrical charge between you and the equipment.

b. Controls hazards

c. Defines operational procedures

d. Trains key personnel

6

33. An electronic device used to minimize or control the current flow in circuit.

a. capacitor c. conductor

b. inductor d. resistor

34. Power handling capacity is measured in _____________.

a. ohm c. volts

b. watts d. ampere

35. Solder is a fusible metal alloy used to join together metal workpieces and having

a melting point below that of the workpieces.

a. alloy c. solder

b. metal d. all of the above

36. ESD stands for ____________.

a. Electro-Static Discharge c. Electro-System Discharge

b. Electronic System Discharge d. Electronic-Static Display

37. Turn the screwdriver _________ to tighten the screw.

a. Counter-clockwise c. turn around

b. Clockwise d. circular

38. To ensure that tools and equipment remain in good condition and last for a long

time you should ____________

a. sell them properly c. store them properly

b. throw it properly d. repair them properly

39. The symbol or ohm.

a. c.

b. d.

40. PPE in computer servicing stands for ________________.

a. Personal protective equipment c. Protection personal equipment

b. Protective personal equipment d. Personal protect equipment

7

Pre-Test Answer Key

1. A

2. D

3. C

4. C

5. B

6. C

7. A

8. D

9. C

10. B

11. A

12. A

13. A

14. D

15. A

16. A

17. A

18. B

19. C

20. A

21. C

22. C

23. D

24. A

25. D

26. A

27. B

28. C

29. B

30. A

31. D

32. A

33. D

34. B

35. C

36. A

37. B

38. C

39. A

40. A

8

USING HAND TOOLS

Lesson 5

LO 1. Prepare hand tools

LO 2: Use appropriate hand tools and test

LO 3: Maintain Hand Tools (Tools and Equipment Maintenance)

LEARNING OUTCOMES:

At the end of this lesson, you are expected to do the following:

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TRUE OR FALSE

A. Direction. Write TRUE if the statement is correct and FALSE if it is wrong. Write your answers

on the blank provided before each number.

_______ 1. Selecting the best tool for each task requires training in the proper use of the tools, field experience in their safe use, and following the manufacturer’s guidance and instructions for that specific tool. _______2. When obtaining the tool, all the associated tooling and consumable parts, as recommended by the manufacturer, must be included. _______3. All tools come with detailed instructions _______4. All tools should be kept in good condition with regular maintenance. _______5. The right protective equipment for the tool and activity must not be used. _______6. The first thing you should do is to plan for the scope taking into account the sequence of tasks. _______7. It is important to have a toolkit that should contain all of the necessary tools. _______8. The hand tools cannot be manually used employing force. _______9. Static electricity is easily generated by friction _______10. Appropriate cleaning tools is essential when maintaining or repairing computers

At the end of the lesson the learner must be able to:

1. Identify different kind of hand tools; and

2. Use the hand tools properly according to their specific function.

OBJECTIVES

Prepare Hand Tools

LEARNING OUTCOME 1

TERIALS PRE-TEST

10

PREPARE HAND TOOLS

Proper tool selection

A tool is a handheld device that aids in accomplishing a task. Tools range from a

traditional metal cutting part of a machine to an element of a computer program

that activates and controls a particular function.

Preparing for the task to be undertaken includes proper tool selection.

1. How do you select the best tool for the job? First, know and understand in detail

the scope of work to be accomplished, second, plan for the scope taking into

account the sequence of tasks.

2. Selecting the best tool for each task requires training in the proper use of the

tools, field experience in their safe use, and following the manufacturer’s guidance

and instructions for that specific tool.

3. When obtaining the tool all the associated tooling and consumable parts, as

recommended by the manufacturer, must be included. In addition, related

consumable parts must also be selected and used according to their

manufacturer’s instructions.

Safe Use of tools

Once selected, use the tool for the purpose for which it was designed. Not all tools

come with detailed instructions, but there are those that do spell out the safety

―Do’s and Don’ts‖ for your safety. If there are set-up/use options, operator

judgment must always be based on what is the safest way to use the tool.

Environmental Safety and Health Program requires the following:

• All tools be kept in good condition with regular maintenance

• The right tool be used for the job

• Each tool be examined before use AND damaged or defective tools NOT to be

used

• Tools be operated according to manufacturer’s instructions

• The right protective equipment for the tool and activity be used

INFORMATION SHEET 1.1

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HARDWARE TOOLS

To complete hardware repairs, it is important to have a toolkit that should contain

all of the necessary tools. As you gain experience, you will learn which tools to

have available for different types of jobs. Hardware tools are grouped into these

four categories:

• Electro-Static Discharge (ESD) tools

• Hand tools

• Cleaning tools

• Diagnostic tools

Electro-Static Discharge (ESD) Tools

Static electricity is easily generated by friction on carpets, tile flooring, clothing,

hair, fabric, and etc. The friction of moving air alone will charge suspended

particles and cause the build-up of static electrical charges on people and objects

in the environment. Grounded antistatic work mats used with antistatic wrist straps

provide the most basic means for the controlled discharge of electrostatic

electricity.

Examples of ESD Tools:

Hand Tools

A hand tool is a device for performing work on a material or a physical system

using only hands. The hand tools can be manually used employing force, or

electrically powered, using electrical current.

Anti-static wrist strap

- Used to prevent ESD damage to computer equipment.

Anti-static mat

- Used to stand on or place hardware on to prevent static electricity from building up.

12

Examples of Hand Tools:

Flat head screwdriver

- Used to loosen or tighten slotted screws.

Philips head screwdriver

- used to loosen or tighten crosshead screws.

Torx screwdriver

- used to loosen or tighten screws that have a star-like depression on the top, a feature that is mainly found on laptop.

Hex driver

- Sometimes called a nut driver, is used to tighten nuts in the same way that a screwdriver tightens screws.

Long nose plier

- Used for holding and bending of wire.

Wire cutter

- Used to strip and cut wires.

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Tweezers

- Used to manipulate small parts.

Part retriever

- Used to retrieve parts from location that are too small for your hand to fit.

Flashlight

- Used to light up areas that you cannot see well.

Crimping Tool

- Used to crimp RJ45 to UTP cable. It also have a cutting edge.

Soldering Iron

- Is used to join two or more metal conductors with the support of soldering lead melted around it.

Cleaning Tools Having the appropriate cleaning tools is essential when maintaining or repairing computers. Using these tools ensures that computer components are not damaged during cleaning.

Examples:

Lint-free cloth

- Used to clean different computer components without scratching or leaving debris.

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Compressed air

- Used to blow away dust and debris from different computer parts without touching the components.

Cable ties

- Used to bundle cables neatly inside and outside of a computer.

Parts organize

- Used to hold screw, jumpers, fasteners and other small parts and prevents them from getting mixed together.

Brush

- Used for cleaning dust.

Diagnostic Tools Computers are easier to use and more dependable with each new generation of hardware and operating system update, but that doesn't mean they're problem-free. Here's the most popular tools for diagnosing your computer problems:

Multitester

- is an electronic measuring instrument

use to measure voltage, current and

resistance.

15

Loopback Adapter

- used to test the functionality of computer ports.

LAN Tester

- is used for testing Ethernet cables for

faults or missing pair connections.

REFERENCES

• https://www.quora.com/

• https://romelblog.wordpress.com/

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IDENTIFYING HAND TOOLS

Direction: Identify the name of each tool and give its function. Refer to the scoring rubrics for

this activity provided at the bottom.

TOOLS FUNCTION

1

2

3

4

5

6

7

8

9

10

11

ACTIVITY SHEET 1.1

17

12

13

14.

15

Scoring Rubrics:

Criteria Points

Complete Answer (Name, Function) 3

Functions only 2

Name only 1

No answer at all 0

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Directions: Search at least three (3) hand tools available at your home. Take a photo and attach

on this activity sheet. Write the name and function of the said tool on the space provided. Please

refer to the Rubrics indicated below for the scoring.

Scoring Rubrics for Hand Tool – Finding

CRITERIA SCORE

The activity is completed with picture of hand tools and functions. 30

The activity has only two picture of hand tools and functions. 20

The activity has only one picture of hand tools and functions. 10

No activity at all. 0

ACTIVITY SHEET 1.2

19

WORD SEARCH PUZZLE

Direction: Find the following words in the puzzle. Words are hidden vertical, horizontal,

or diagonal.

TASK SHEET 1.1

20

TRUE OR FALSE

A. Direction. Write TRUE if the statement is correct and FALSE if it is wrong. Write your answers

on the blank provided before each number.

_______ 1. Selecting the best tool for each task requires training in the proper use of the tools,

field experience in their safe use, and following the manufacturer’s guidance and instructions for

that specific tool.

_______ 2. When obtaining the tool, all the associated tooling and consumable parts, as

recommended by the manufacturer, must be included.

_______ 3. All tools come with detailed instructions

_______ 4. All tools should be kept in good condition with regular maintenance.

_______ 5. The right protective equipment for the tool and activity must not be used.

_______6. The first thing you should do is to plan for the scope taking into account the sequence

of tasks.

_______7. It is important to have a toolkit that should contain all of the necessary tools.

B. Direction. Name the tools inside the box.

1. ______________

2. ______________

3. ______________

4. _____________

5. ______________

6. ______________

7. ______________

8. _____________

SELF CHECK 1.1

21

Direction. Identify the appropriate tool to use for each of the following: (1pt each)

_________________1. Equalize the electrical charge between you and the equipment.

_________________2. Tighten / loosen screw

_________________3. Tighten / loosen bolt with a hexagonal head.

_________________4. Retrieve parts that may be hard to reach by your fingers.

_________________5. Tighten / loosen a slotted screw


1. Understand the proper use of hand tools; and

2. Use the hand tools appropriately.

OBJECTIVES

Use Appropriate Hand Tools and Test

Equipment

LEARNING OUTCOME 2

TERIALS PRE-TEST

22

The purpose of an antistatic wrist strap is to equalize the

electrical charge between you and the equipment. The

antistatic wrist strap is a conductor that connects your

body to the equipment that you are working on.

When static electricity builds up in your body, the

connection made by the wrist strap to the equipment, or

ground, channels the electricity through the wire that

connects the strap.

APPROPRIATE HAND TOOLS AND TEST EQUIPMENT Proper Use of ESD Tools

The wrist strap has two parts and is easy to wear: 1. Wrap the strap around your wrist and secure it using the snap or Velcro. The metal on

the back of the wrist strap must remain in contact with your skin at all times.

2. Snap the connector at the end of the wire to the wrist strap, and connect the other end

either to the equipment or to the same grounding point that the antistatic mat is connected

to. The metal skeleton of the case is a good place to connect the wire.

When connecting the wire to equipment that you are working on, choose an unpainted

metal surface. A painted surface does not conduct the electricity as well as unpainted

metal. An antistatic mat is slightly conductive. It works by drawing static electricity away

from a component and transferring it safely from equipment to a grounding point:

1. Lay the mat on the workspace next to or under the computer case.

2. Clip the mat to the case to provide a grounded surface on which you can place parts

as you remove them from the system. Reducing the potential for ESD reduces the

likelihood of damage to delicate circuits or components.

PROPER USE OF HAND TOOLS

A technician needs to be able to properly use each tool in the toolkit. This

topic covers many of the various hand tools used when repairing computers.


https://bit.ly/31y5F81


23

Screws

Match each screw with the proper screwdriver. Place the tip of the screwdriver on the

head of the screw. Turn the screwdriver clockwise to tighten the screw and counter

clockwise to loosen the screw. Screws can become stripped if you over-tighten them with

a screwdriver. A stripped screw, may get stuck in the screw hole, or it may not tighten

firmly. Discard stripped screws.

Flat head screwdriver

Use a flat head screwdriver when you are working with a slotted screw. Do not use a flat

head screwdriver to remove a Phillips head screw. Never use a screwdriver as a pry bar.

If you cannot remove a component, check to see if there is a clip or latch that is securing

the component in place.

CAUTION: If excessive force is needed to remove or add a component, something is

probably wrong. Take a second look to make sure that you have not missed a screw or a

locking clip that is holding the component in place. Refer to the device manual or diagram

for additional information.

Phillips head screwdriver

Use a Phillips head screwdriver with crosshead screws. Do not use this type of

screwdriver to puncture anything. This will damage the head of the screwdriver.

Hex driver

Use a hex driver to loosen and tighten bolts that have a hexagonal (six-sided) head. Hex

bolts should not be over-tightened because the threads of the bolts can be stripped. Do

not use a hex driver that is too large for the bolt that you are using.

CAUTION: Some tools are magnetized. When working around electronic devices, be sure

that the tools you are using have not been magnetized. Magnetic fields can be harmful to

data stored on magnetic media. Test your tool by touching the tool with a screw. If the

screw is attracted to the tool, do not use the tool.

Part retriever, Needle-nose pliers, or tweezers

The part retriever, needle-nose pliers, and tweezers can be used to place and retrieve

parts that may be hard to reach with your fingers. Do not scratch or hit any components

when using these tools.

CAUTION: Pencils should not be used inside the computer to change the setting of

switches or to pry off jumpers. The pencil lead can act as a conductor and may damage

the computer components.

24


PROPER USE OF CLEANING MATERIALS

Keeping computers clean inside and out is a vital part of a maintenance program. Dirt can

cause problems with the physical operation of fans, buttons, and other mechanical

components. On electrical components, an excessive build up of dust will act like an

insulator and trap the heat. This insulation will impair the ability of heat sinks and cooling

fans to keep components cool, causing chips and circuits to overheat and fail.

CAUTION: When compressed air is used to clean inside the computer, the air should be

blown around the components with a minimum distance of four inches from the nozzle.

The power supply and the fan should be cleaned from the back of the case.

CAUTION: Before cleaning any device, turn it off and unplug the device from the power

source.

Computer Cases and Monitors

Clean computer cases and the outside of monitors with a mild cleaning solution on a

damp, lint-free cloth. Mix one drop of dishwashing liquid with four ounces of water to

create the cleaning solution. If any water drips inside the case, allow enough time for the

liquid to dry before powering on the computer.

LCD Screens

Do not use ammoniated glass cleaners or any other solution on an LCD screen, unless

the cleaner is specifically designed for the purpose. Harsh chemicals will damage the

coating on the screen. There is no glass protecting these screens, so be gentle when

cleaning them and do not press firmly on the screen.

CRT Screens

To clean the screens of CRT monitors, dampen a soft, clean, lint-free cloth with distilled

water and wipe the screen from top to bottom. Then use a soft, dry cloth to wipe the

screen and remove any streaking after you have cleaned the monitor.

Clean dusty components with a can of compressed air. Compressed air does not cause

electrostatic build-up on components. Make sure that you are in a well-ventilated area

25

before blowing the dust out of the computer. A best practice is to wear a dust mask to

make sure that you do not breathe in the dust particles. Blow out the dust using short

bursts from the can. Never tip the can or use the compressed air can upside down. Do

not allow the fan blades to spin from the force of the compressed air. Hold the fan in

place. Fan motors can be ruined from spinning when the motor is not turned on.

Component Contacts

Clean the contacts on components with isopropyl alcohol. Do not use rubbing alcohol.

Rubbing alcohol contains impurities that can damage contacts. Make sure that the

contacts do not collect any lint from the cloth or cotton swab. Blow any lint off the contacts

with compressed air before reinstallation.

Keyboard

Clean a desktop keyboard with compressed air or a small, hand-held vacuum cleaner

with a brush attachment.

CAUTION: Never use a standard vacuum cleaner inside a computer case. The plastic

parts of the vacuum cleaner can build up static electricity and discharge to the

components. Use only a vacuum approved for electronic components.

Mouse

Use glass cleaner and a soft cloth to clean the outside of the mouse. Do not spray glass

cleaner directly on the mouse. If cleaning a ball mouse, you can remove the ball and clean

it with glass cleaner and a soft cloth. Wipe the rollers clean inside the mouse with the

same cloth. Do not spray any liquids inside the mouse.

REFERENCES

• Ron Gilster, PC Repair Bench Book., Wiley Publishing Inc., 10475

Crosspoint Boulevard, Indianapolis, IN 46256

• Barry Press, Marcia Press, PC Upgrade and Repair Bible, Desktop

Edition., Wiley Publishing Inc., 10475 Crosspoint Boulevard,

Indianapolis,

IN 46256

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FILL-IN THE BLANKS

Direction: Fill each blank with the best answer. Write your answer on the blank provided

on each number. (1pt each)

1. Keeping computers clean inside and out is a vital part of a

___________________ program.

2. Clean computer cases and the outside of ________________ with a mild

cleaning solution on a damp, lint-free cloth.

3. Do not use ammoniated glass cleaners or any other ______________ on an

LCD screen, unless the cleaner is specifically designed for the purpose.

4. Harsh _________________ will damage the coating on the screen.

5. Compressed air does not cause ______________ build up on components.

Make sure that you are in a well-ventilated area before blowing the dust out of

the computer.

6. Clean a desktop _______________ with compressed air or a small, hand-held

vacuum cleaner with a brush attachment.

7. Use glass cleaner and a soft cloth to clean the outside of the mouse. Do not

spray glass cleaner directly on the ________________.

8. Use a ________________ to loosen and tighten bolts that have a hexagonal

(six-sided) head.

9. Use a ________________ screwdriver when you are working with a slotted

screw.

10. Use a ________________screwdriver with crosshead screws. Do not use this

type of screwdriver to puncture anything.

ACTIVITY SHEET 2.1

CHOICES

Maintenance solution chemicals electrostatic

Monitor keyboard mouse Hex driver

Flat head Philips Head

27

MULTIPLE CHOICE

Direction: Choose the letter of the best answer. Write your answer on the blank

provided before the number.

________1. When compressed air is used to clean inside the computer, the air should

be _________around the components.

a. blown c. clean

b. compressed d. tighten

________2. Clean computer cases and the outside of monitors with a mild cleaning

solution on a damp __________.

a. waste-free cloth c. dust-free cloth

b. damp cloth d. lint-free cloth

________3. Clean the contacts on components with isopropyl alcohol

a. rubbing alcohol c. isopropyl alcohol

b. ethyl alcohol d. none of the above.

_________4. What is the minimum distance of components when blowing using

compressed air?

a. 2 inches c. 4 inches

b. 3 inches d. 5 inches

_________5. When working around electronic devices, be sure that the tools you are

using have not been ___________.

a. pulverized c. sanitized

b. magnetized d. oxidized

__________6. A ___________needs to be able to properly use each tool in the toolkit.

a. technician c. plumber

b. electrician d. engineer

__________7. Do not spray any ________ inside the mouse.

a. solid c. fuel

b. gas d. liquid

__________8. Never use a _________vacuum cleaner inside a computer case.

a. sub-standard c. standard

b. average d. non-average

__________9. What does CRT stands for?

a. cathion ray tube c. cathode ray tube

b. cathion rey tube d. cathode rey tube

__________10.The pencil can act as a _______ and may damage the computer

components.

a. insulator c. inductor

b. conductor d. resistor

TASK SHEET 2.1

28

__________11. The purpose of an antistatic wrist strap is to ___________ the electrical

charge between you and the equipment

a. equalize c. qualify

b. equalizer d. qualifier

__________12. It can be harmful to data stored on magnetic media.

a. magnetic field c. land field

b. isolated field d. green field

__________13. An excessive build-up of dust will act like a/an ________.

a. resistor c. insulator

b. inductor d. conductor

__________14. Turn the screwdriver _________ to tighten the screw.

a. Counter-clockwise c. turn around

b. Clockwise d. circular

__________15. Turn the screwdriver _________ to loosen the screw.

a. Clockwise c. turn around

b. circular d. counter clockwise

A. Direction. Identify the appropriate tool to use for each of the following: (1pt each)

_________________1. Equalize the electrical charge between you and the equipment.

_________________2. Tighten / loosen screw

_________________3. Tighten / loosen bolt with a hexagonal head.

_________________4. Retrieve parts that may be hard to reach by your fingers.

_________________5. Tighten / loosen a slotted screw.

B. Direction: Complete the computer cleaning chart shown below.

Components to Clean Clean with:

Computer Case and Outside Monitor

Heat Sink

Keyboard

LCD Screen

Mouse

Ram

SELF CHECK 2.1

29

S

TRUE OF FALSE

Direction: Write TRUE if then statement signifies correct information and FALSE

if it gives wrong information.

1. Productivity is increased because time is not lost looking for tools, parts and

equipment is one of the benefits of proper storage.


endangered.

3. Use bins for storing small parts is a good practice on proper storage.

4. Preventive maintenance is the systematic care and protection of tools,

equipment and machines in order to keep them in a safe, usable condition,

limit downtime and extend productivity.

5. Properly stored tools and equipment will be easy to find when needed and are

less likely to be lost.


• Know how to maintain hand tools;

• Explain the importance of maintaining hand tools; and

• Maintain the safety

OBJECTIVES

Maintain Hand Tools (Tools and Equipment

Maintenance)

LEARNING OUTCOME 3

TERIALS PRE-TEST

30

MAINTAIN HAND TOOLS (TOOLS AND EQUIPMENT MAINTENANCE)

All tools and equipment must be properly

maintained so that workers are not endangered.

Regulations require inspections of tools, machines and equipment before use. Preventive maintenance is the systematic care and protection of tools, equipment and machines in order to keep them in a safe, usable condition, limit downtime and extend productivity. We must always be aware that maintenance tasks

themselves are potentially hazardous and can result in injury. The successful maintenance program is:

• well organized and scheduled,

• controls hazards,

• defines operational procedures, and

• trains key personnel.

General requirements for tools and equipment maintenance include: ✓ Obtaining a copy of the maintenance schedule recommended by the manufacturer ✓ Ensuring that maintenance is performed as required ✓ Ensuring that the person(s) performing the maintenance are competent (e.g.

licensed mechanic) ✓ Retaining records of maintenance/service conducted.

✓ Specifying who is responsible for overseeing equipment maintenance and where the

records are kept.

✓ Set up a system for removal and tagging of damaged or defective tools and equipment.

PROPER STORAGE OF TOOLS, PARTS, AND EQUIPMENT

To ensure that tools and equipment remain in good condition and last for a long time,

store them properly. Properly stored tools and equipment will be easy to find when needed

and are less likely to be lost.

Good practices include:

✓ Parts should be properly stored and can be labeled (Figure 1).

✓ Use bins for storing small parts.

✓ Consider making an individual (or individuals) responsible for the good

maintenance tools and parts.


31

https://tecratools.com/media/productImages/80120rwlb-front.jpg

Figure 1.

Benefits:

➢ Tools and parts are kept in good condition and are easy to find

➢ Costs are reduced.

➢ Productivity is increased because time is not wasted looking for tools, parts and

equipment.

➢ Workshop staff develop a sense of responsibility and pride in their work.

Note:

Most manufacturers can provide maintenance schedules for their equipment. Large

companies typically have a comprehensive maintenance program due to the capital

investment and/or leasing agreements. Smaller companies may lease equipment and

maintenance services may be included in the leasing agreement.

REFERENCES

https://eastmanshop.com/blog/how-to-maintain-your-hand-tools/

https://www.ciscopress.com/articles/article.asp?p=2086239&seqNum=7

https://lowellcorp.com/properly-maintaining-your-tools/

32

TRUE OF FALSE

Direction: Write TRUE if then statement signifies correct information and FALSE

if it gives wrong information.

1. Productivity is increased because time is not lost looking for tools, parts and

equipment is one of the benefits of proper storage.


endangered.

3. Use bins for storing small parts is a good practice on proper storage.

4. Preventive maintenance is the systematic care and protection of tools,

equipment and machines in order to keep them in a safe, usable condition,

limit downtime and extend productivity.

5. Properly stored tools and equipment will be easy to find when needed and are

less likely to be lost.

6. The degree of detail to include regarding tools and equipment maintenance

will depend on the kinds of tools/equipment used.

7. Most manufacturers can provide maintenance schedules for their equipment.

8. Damaged or defective equipment/tools should be tagged and removed from

service.

9. Smaller companies may lease equipment and maintenance services may be

included in the leasing agreement.

10. To ensure that tools and equipment remain in good condition and last for a

long time, store them properly.

Answer:

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

ACTIVITY SHEET 3.1

33

MULTIPLE CHOICE

Direction: Choose the letter of the correct answer. Write our answer on the blank

provided before the number.

_________1. All tools and equipment must be properly maintained so that workers are

not _________

a. endangered c. organized

b. protection d. hazard

_________2. Preventive maintenance is the systematic care and protection of tools,

equipment and machines

a. preventive maintenance c. maintenance program

b. organization d. regulation

_________3.The following are the successful maintenance program except:

a. well organized and scheduled

b. controls hazards

c. defines operational procedures

d. none of the above

_________4.Regulations require ____________of tools, machines and equipment

before use.

a. inspection c. regulation

b. maintenance d. operation

_________5. Most manufacturers can provide ____________for their equipment.

a. maintenance schedule

b. preventive maintenance

c. operational procedure

d. maintenance regulation

ENUMERATION

Direction: Enumerate the following. (2 pts. each)

A. 3 Benefits of maintaining the hand tools (1-3)

B. 2 Good practices of maintaining the hand tools (4-5)

TASK SHEET 3.1

SELF CHECK 3.1

34

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ess Quality of Receive Materials

LO 1: Occupational Health and Safety Procedure (Identify hazards

and risk)

LO 2: Resistor Color Code and Management

LO 3: Electrical Circuit

LO 4: Wire Joints and Splicing

LEARNING OUTCOMES:

At the end of this lesson, you are expected to do the following:

TERMINATING AND CONNECTING ELECTRICAL

WIRING AND ELECTRONICS CIRCUIT

Lesson 6

35

FILL-IN THE BLANKS


on each number.

1. Hazard/risks in the ________________ and their corresponding indicators are

identified to minimize or eliminate risk to co-workers, workplace and environment.

2. _________________ measures during workplace accidents, fire and other

emergencies are recognized.

3. Always ____________ with someone else if possible.

4. Follow the rules and _____________ to prevent accident.

5. Hold the components by the edges and do not touch the ______________.

6. Always power off and ____________ the computer before working on it.

7. Take necessary precautions to ______________the components of the computer

from damage caused by ESD (Electrostatic Discharge).

8. Personal protective _____________ is correctly used in accordance with

organization Occupational 9. _____________ safety 10. _____________ and

practices.

Occupational Health and Safety Procedure

(Identify hazards and risk)

LEARNING OUTCOME 1


1. Identify hazard and risk; and

2. Value the significance of knowing hazard and risk.

OBJECTIVES

TERIALS PRE-TEST

36

IDENTIFY HAZARDS AND RISK

1. Contingency measures during workplace accidents, fire and other emergencies

are recognized.

2. Personal protective equipment is correctly used in accordance with organization

OHS procedures and practices.

3. Hazard/risks in the workplace and their corresponding indicators are identified to

minimize or eliminate risk to co-workers, workplace and environment.

4. Take necessary precautions to protect the components of the computer from

damage caused by ESD (Electrostatic Discharge).

5. Hold the components by the edges and do not touch the IC’s.

6. Wear rubber sole shoes when standing on the ground or in a concrete floor.

7. Always power off and unplug the computer before working on it.

8. Always work with someone else if possible.

9. Follow the rules and instruction to prevent accident.

10. Remove all jewelries when working inside the computer.

11. Wear shoes with non-conductive rubber soles to help reduce the chance of being

shocked or seriously injured in an electrical accident.

12. Be sure not to mix electronic components and water.

Work Place Procedures

• Identify hazards and assess risk.

• Execution of OHS policies are carried out along with the task.

• Following certain procedure is very important to perform a given operation or

evolution or in reaction to a given event.

• The table below shows different elements and their corresponding performance

criteria to be able to identify occupational health and safety hazards, and assess

risk, as well as follow instructions and procedure in the workplace with minimal

supervision. The students will also be capable of participating and contributing to

OHS management issues.

ELEMENT PERFORMANCE CRITERIA

1. Identify hazards and assess risk.

1.1 Identify hazards in the work area and during the performance of workplace duties. 1.2 Assess level of risk.


37

2. Follow procedures and strategies for risk control.

2.1 Report hazards in the work area to designated personnel according to workplace procedures 2.2 Follow workplace procedures and work instructions for assessing and controlling risks with minimal supervision. 2.3 Whenever necessary, within the scope of responsibilities and competencies, follow workplace procedures for dealing with hazards and incidents, fire and/or other emergencies.

3. Contribute to OHS in the workplace.

3.1. Raise task and/or job specific OHS issues with appropriate people in accordance with workplace procedures and relevant OHS legislative requirements. 3.2. Provide feedback to supervisor on hazards in work area in line with organisational OHS policies and procedures 3.3. Provide support in implementing procedures to control risks in accordance with organisational procedures

4. Examples of OHS issues which may need to be raised by workers with designated personnel may include:

▪ Hazards identified ▪ Problems encountered in managing

risks associated with hazards ▪ Clarification on understanding of

OHS policies and procedures ▪ Communication and consultation

processes ▪ Follow up on reports and feedback. ▪ Effectiveness of risk controls in

place

REFERENCES

▪ https://www.scribd.com/document/340080493/12-OHS-Procedures-

for-Computer-Hardware-Servicing-NC-II

▪ https://gselodelmsapp.wordpress.com/online-courses-

page/occupational-health-and-safety-procedures/practice-

occupational-health-and-safety-procedures/lesson-01-identify-

hazard-and-risks/

38

Direction: Complete the table below with the needed information.

ELEMENT PERFORMANCE CRITERIA

Identify hazards and assess risk. 1. 2.

3. Provide feedback to supervisor on hazards in work area in line with organisational OHS policies and procedures.

4. Raise task and/or job specific OHS issues with appropriate people in accordance with workplace procedures and relevant OHS legislative requirements.

(3) Examples of OHS issues which may need to be raised by workers with designated personnel may include:

5. 6. 7.

8. Follow workplace procedures and work instructions for assessing and controlling risks with minimal supervision.

ACTIVITY SHEET 1.1

39

9. Provide support in implementing procedures to control risks in accordance with organisational procedures

10. Report hazards in the work area to designated personnel according to workplace procedures

TRUE OF FALSE

Direction: Write T if the statement signifies correct information and F if it gives

wrong information.

1. Be sure to mix electronic components and water.

2. Personal protective equipment is correctly used in accordance with organization

OHS procedures and practices.

3. Wear shoes with conductive rubber soles to help reduce the chance of being

shocked or seriously injured in an electrical accident.

4. Take necessary precautions to protect the components of the computer from

damage caused by ESD (Electrostatic Discharge).

5. Wear leather sole shoes when standing on the ground or in a concrete floor.

6. Do not power off and unplug the computer before working on it.

7. Always work with someone else if possible.

8. Do not follow the rules and instruction to prevent accident.

9. Remove all jewelries when working inside the computer.

10. Hold the components by the edges and do not touch the IC’s.

TASK SHEET 1.1

40

FILL-IN THE BLANKS


on each number.

1. Hazard/risks in the ________________ and their corresponding indicators

are identified to minimize or eliminate risk to co-workers, workplace and

environment.

2. _________________ measures during workplace accidents, fire and other

emergencies are recognized.

3. Always ____________ with someone else if possible.

4. Follow the rules and _____________ to prevent accident.

5. Hold the components by the edges and do not touch the ______________.

6. Always power off and ____________ the computer before working on it.

7. Take necessary precautions to ______________the components of the

computer from damage caused by ESD (Electrostatic Discharge).

8. Personal protective _____________ is correctly used in accordance with

organization Occupational 9. _____________ safety 10. _____________ and

practices.

SELF CHECK 1.1

41

Direction: Identify the following.

______________1. It is the unit of measurement for Resistance.

______________2. It is indicated by the fourth band.

______________3. It is the unit of measurement for power handling capacity.

______________4. Usually used to control large currents.

______________5. A composition where in Resistors are made up to become resistant.

Resistor Color Code and Management

LEARNING OUTCOME 2


1. Identify resistor code and management; and

2. Calculate the Band Value.

3. Value the significance of resistor code and management.

OBJECTIVES

TERIALS PRE-TEST

42

RESISTOR COLOR CODE AND MANAGEMENT

RESISTOR

A resistor is an electronic device used to minimize or control the current flow in

circuit. Generally, resistors are the most common components used in all kinds of

electronic equipment.

Resistors are made up of

special resistance wire, graphite

(carbon) composition, or of metal

film. Wire wound resistors are

usually used to control large

currents, while carbon resistors

controls current which are

relatively small.

Color Code

The resistance value is indicated by the first three bands while the tolerance

value is indicated by the fourth band. Each of these colors, from black to white is

assigned a numerical value.

Classification of resistors consists of three main properties.

Resistance, measured in ohms,

Tolerance of the resistance value, shown as a percentage,

Power handling capacity, measured in watts.

The first two can be taken from the table above using the 4 or 5 band code as

appropriate. The power handling capacity is not normally indicated with bands but can

sometimes be printed on the component itself, particularly for the higher wattage resistors


REFERENCES

▪ https://www.pc-control.co.uk/resistor_code.htm

▪ http://www.resistorguide.com/what-is-a-resistor/

https://www.pc-control.co.uk/resistor_code.htm

43

http://burnhamradioclub.co.uk/index.php/useful-tools/resistor-colour-codes/

4 BAND VALUE:

Green: 5 Blue: 6 Yellow: 10k or 10,000 Ω Tolerance: Gold ±5%

Answer: 56 x 10000 = 560,000 Ω with ̉tolerance of ±5%

5 BAND VALUE:

Red: 2 Orange: 3 Violet: 7 Black: 1 Ω Tolerance: Brown ±1%

Answer: 237 x 1 Ω = 237 Ω with tolerance of ±1%

44

Complete the table below:

Identification

Direction: Identify the following.

______________1. It is the unit of measurement for Resistance.

______________2. It is indicated by the fourth band.

______________3. It is the unit of measurement for power handling capacity.

______________4. Usually used to control large currents.

______________5. A composition where in Resistors are made up to become resistant.

______________6. It is indicated by the first three bands.

_____________7. An electronic device used to minimize or control the current flow in

circuit.

______________8. Controls current which are relatively small.

______________9. The resistance value shown as a percentage. ______________10. The symbol for Ohm.

COLOR 1ST BAND 2ND BAND 3RD BAND MULTIPLIER TOLERANCE

Black 0 0 1Ω

Brown 1 1 10 Ω

2 2

3 3

Yellow 4 4 10,000 Ω

5 5

blue 6 6 1,000,000 Ω

7 7

Grey 8 8 ±0.05%

9 9

Gold

Silver

ACTIVITY SHEET 2.1

TASK SHEET 2.1

45

Direction: Get the value of the following resistor. (5pts per number)

1.

2.

3.

Image Source: https://www.circuitcrush.com/resistor-color-code/

SELF CHECK 2.1

https://www.circuitcrush.com/resistor-color-code/

46

TRUE OR FALSE

Direction: Write T if the statement signifies correct information and F if the statement

gives wrong information.

1. In a parallel circuit, the components are arranged in a way that the heads of each

component are connected together with a common point.

2. In the series circuit, the components in the circuit are connected one after the other or

we can say in a cascaded fashion.

3. Every device must function for the circuit to be complete. One bulb burning out in a

series circuit breaks the parallel circuit.

4. If each bulb is wired to the battery in a separate loop, the bulbs are in series. Each light

has its own circuit, so all but one light could be burned out, and the last one will still

function.

5. Electrical wiring in general refers to insulated conductors used to carry electricity, and

associated devices.


1. Identify the two circuit components.

2. Differentiate stranded wires from solid wires.

3. Value the significance of Electrical Circuit and Electrical wires.

OBJECTIVES

TERIALS PRE-TEST

Electrical Circuit and Electrical Wires

LEARNING OUTCOME 3

47

ELECTRICAL CIRCUIT AND ELECTRICAL WIRES

Series and Parallel Circuits

There are two basic ways in which to connect more than two circuit components: series

and parallel.

In the series circuit, the components in the circuit are connected one after the other or we can say in a cascaded fashion. More specifically we can say that a series circuit allows the connection in a manner that tail of one component is directly connected to the head of the other and so on corresponding to the two ends of the battery. The figure below shows the series connection of 4 resistors in a circuit:

In a series circuit, every device must function for the

circuit to be complete. One bulb burning out in a series

circuit breaks the circuit.

In a parallel circuit, the components are arranged in a way that the heads of each component are connected together with a common point. While the tails

are connected together with another common point. Thereby forming multiple parallel branches in the circuit.


48

The figure here shows the parallel connection of 4 resistors in a circuit:

If each bulb is wired to the battery in a separate loop, the bulbs are in parallel. Each light has its own circuit, so all but one light could be burned out, and the last one will still function.

ELECTRICAL WIRES

Electrical wiring in general refers to insulated conductors used to carry electricity,

and associated devices.

A. Stranded Wires

https://www.meridiancableassemblies.com/2017/06/multi-stranded-wiring-assembly/

https://www.meridiancableassemblies.com/2017/06/multi-stranded-wiring-assembly/

https://circuitglobe.com/wp-content/uploads/2019/09/parallel-circuit.jpg

49

• Stranded wire is helpful in larger wire sizes to enable more flexibility in routing of

the wire and offers more durability for applications where vibration and

occasional movement of the wire could cause breakage of a stiffer solid wire.

Advantages of Stranded Wire:

1. More flexible for routing

2. More durable for vibration and infrequent movement.

Disadvantages of Stranded Wire:

1. Larger size.

2. More costly

B. Solid Wires

Generally, for small wires sizes and for static

applications with low levels of vibration, a solid wire is

chosen as it is easy to bend and route, and low cost.

Advantages of Solid Wire:

1. More compact

2. Lower cost

Disadvantages of Solid Wire:

1. Only practical and available in small sizes.

2. Flexing or vibration will fatigue the wire and cause

it to break.

REFERENCES

▪ https://circuitglobe.com/difference-between-series-and-parallel-circuit.html

▪ https://blog.jemelectronics.com/stranded-vs-solid-wire

https://arizona.ph/product-category/wires-cables/

https://arizona.ph/product-category/wires-cables/

50

Direction: Apply what is needed for the following:

1. Draw a series circuit diagram (5pts)

2. Draw parallel circuit diagram (5pts)

3. (3) Advantages of Solid wire

4. (2) Advantages of Stranded Wire

ACTIVITY SHEET 3.1

51

Word Scramble

Direction: Unscramble the words below. Write your answer on the blank provided.

TASK SHEET 3.1

52

TRUE OR FALSE

Direction: Write T if the statement signifies correct information and F if the statement

gives wrong information.

1. In a parallel circuit, the components are arranged in a way that the heads of each

component are connected together with a common point.

2. In the series circuit, the components in the circuit are connected one after the

other or we can say in a cascaded fashion.

3. Every device must function for the circuit to be complete. One bulb burning out in

a series circuit breaks the parallel circuit.

4. If each bulb is wired to the battery in a separate loop, the bulbs are in series.

Each light has its own circuit, so all but one light could be burned out, and the

last one will still function.

5. Electrical wiring in general refers to insulated conductors used to carry electricity,

and associated devices.

6. Solid wire are constructed of one, single piece of metal. It is tougher than a

stranded conductor, but rigid and less flexible than a stranded conductor.

7. Stranded wire is composed of a number of small wires bundled or wrapped

together to form a larger conductor.

8. In choosing stranded wire vs. solid wire all needs must be weighed and

considered. Initial cost vs. long-term costs should be weighed against

environmental factors, applications, loads, motion, and durability for the project.

SELF CHECK 3.1

53

Direction: Arrange the following steps on splicing the wire. Use number from 1-9 to

arrange the steps.

a. Cut a piece of heat shrink to cover the exposed wires. Slide the heat shrink through one of the wires. Make sure to slide the heat shrink away from area where you are splicing.

b. Face the wire terminals toward each other and touch the exposed ends together.

c. Prepare the wire by stripping the wires ends using a wire stripper. If you are working with stranded wire, try twisting the ends to group the strands together and tinning the tips before soldering.

d. Add solder to the wires. Try not to leave the soldering iron on the wires too long. The insulation can melt away exposing more wire.

e. Hold the wires together by using tape to hold the wires in place against a soldering mat.

f. Ensure that the underside of the wire is also soldered.

g. When complete, the heat shrink should fit over the exposed wire.

h. Flip the wire over and spread solder over the wires. If necessary, add flux and solder to cover wires.

i. If you are using heat shrink, slide it over the terminal to insulate the connection. Apply heat to the heat shrink from a soldering iron or a hot air rework station.

Wire Joints and Splicing

LEARNING OUTCOME 4


1. Define wire joints and splicing.

2. Classify different wire joints.

3. Illustrate different wire joints.

OBJECTIVES

TERIALS PRE-TEST

54

WIRE JOINTS AND SPLICING

• A splice is the joining of two or more wires by twisting them together.

A plastic connector, called a wire nut, is used to insulate and secure the splice.

• Joints or splices connection: a join made by connecting two pieces of

something.

• Wire is commonly used to connect parts of an electrical circuit that are not

mounted on the same surface.

• The wire must extend from surface to surface, leaving it exposed to potential

forms of abrasion or stress wear. If a wire becomes damaged, it does not

necessarily need to be replaced. The circuit may be restored by making a splice.

• When working with electronic equipment or with electrical wiring, it may from time

to time become necessary to splice or join wires together. Splices and joints are

essentially the same thing. Several different methods of doing this exist.

• The fundamental necessities of an effective splice include making sure the wires

are securely fastened to each other even without solder and that they are well-

soldered to avoid corrosion. All wire joints must also be taped with electrical tape

after soldering.

Splicing the Wires

1. Prepare the wire by stripping the wires ends using a wire stripper. If you are

working with stranded wire, try twisting the ends to group the strands together

and tinning the tips before soldering.


55

2. Cut a piece of heat shrink to cover the exposed wires. Slide the heat shrink through one

of the wires. Make sure to slide the heat shrink away from area where you are splicing.

3. Face the wire terminals toward each other and touch the exposed ends together.

56

4. Hold the wires together by using tape to hold the wires in place against a soldering mat.

5. Add solder to the wires. Try not to leave the soldering iron on the wires too long. The

insulation can melt away exposing more wire.

6. Ensure that the underside of the wire is also soldered.

57

7. Flip the wire over and spread solder over the wires. If necessary, add flux and solder to

cover wires.

8. If you are using heat shrink, slide it over the terminal to insulate the connection. Apply heat to

the heat shrink from a soldering iron or a hot air rework station.

9. When complete, the heat shrink should fit over the exposed wire.

58

WIRE JOINTS

A. Western Union Short Tie

B. Knotted tap joint

59

C. Rat tail joint

D. Staggering splices

60

E. Fixture joint

SOLDERING PROCESS

Solder is a fusible metal alloy used to join together metal workpieces and having a

melting point below that of the workpiece(s). Tin/lead alloys are commonly used for

electrical soldering. The greater the tin concentration, the greater the

solder’s tensile and shear strengths.

• Cleanliness is essential for efficient, effective soldering. Solder will not adhere to

dirty, greasy, or oxidized surfaces. Heated metals tend to oxidize rapidly. This is

the reason the oxides, scale, and dirt must be removed by chemical or

mechanical means.

• Grease or oil films can be removed with a suitable solvent. Connections to be

soldered should be cleaned just prior to the actual soldering operation. Items to

be soldered should normally be "tinned" before making a mechanical connection.

• Tinning is the coating of the material to be soldered with a light coat of solder.

When the surface has been properly cleaned, a thin, even coating of flux should

be placed over the surface to be tinned.

62

Draw the following wire joints. (5 pts each)

1. Fixture Joints

2. Staggering Splices

3. Rat Tail Joints

4. Knotted Tap Joint

5. Western Union Short Tie

ACTIVITY SHEET 4.1

63

CROSSWORD PUZZLE

Directions: Complete the crossword puzzle.

TASK SHEET 4.1

64

Direction: Arrange the following steps on splicing the wire. Use number from 1-9 to

arrange the steps.

a. Cut a piece of heat shrink to cover the exposed wires. Slide the heat shrink through one of the wires. Make sure to slide the heat shrink away from area where you are splicing.

b. Face the wire terminals toward each other and touch the exposed ends together.

c. Prepare the wire by stripping the wires ends using a wire stripper. If you are working with stranded wire, try twisting the ends to group the strands together and tinning the tips before soldering.

d. Add solder to the wires. Try not to leave the soldering iron on the wires too long. The insulation can melt away exposing more wire.

e. Hold the wires together by using tape to hold the wires in place against a soldering mat.

f. Ensure that the underside of the wire is also soldered.

g. When complete, the heat shrink should fit over the exposed wire.

h. Flip the wire over and spread solder over the wires. If necessary, add flux and solder to cover wires.

i. If you are using heat shrink, slide it over the terminal to insulate the connection. Apply heat to the heat shrink from a soldering iron or a hot air rework station.

SELF CHECK 4.1

LEARNING MATERIAL

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