Functions of tools used in mobile phone repairs for JSS 1

Class: JSS 1
Term: First Term
Week: 10
Age: 12 years
Duration: 45 minutes
Subject: Computer Hardware and GSM Repairs
Curriculum Theme: Introduction to mobile Phone Repair
Focal competence: Identify common hardware tools when carrying out mobile phone repairs
Key competencies/values: Collaboration; Problem solving; Responsibility
Skills:

• Manipulate different tools used in repairing mobile phone
• Sketch and label mobile phone tools

Previous Lesson: Types of hand tools used in mobile phone repairs
Topic: Functions of tools used in mobile phone repairs: Functions of Tools Used In Mobile
Subject Matter: Functions of tools used in mobile phone repairs

Specific Objectives

By the end of the lesson, pupils/students should be able to:

Cognitive Domain

• Identify specific tools used in mobile phone repairs.
• State the function or use of each identified mobile phone repair tool.
• State safety precautions for using mobile phone repair tools.

Psychomotor Domain

• Use selected repair tools correctly under supervision.
• Demonstrate proper handling and storage of selected repair tools.

Social Domain

• Collaborate with peers to identify and discuss the uses of repair tools.

Reference Materials

The following resources were used in planning this lesson:

• 2025 Revised 9 Years Basic Education Curriculum
• Relevant State Unified Scheme of Work
• Basic Computer Hardware and GSM Repairs for Junior Secondary Schools Book 1
• The HeadTeacher Scheme of work

Instructional Materials

The teacher will teach this lesson with the aid of:

• Actual mobile phones (faulty ones for demonstration)
• Microscope/magnifying lens
• Solder iron
• Table lamp
• Soldering station
• PCB holder/PCB Stand
• Precision screwdriver set
• Multimeter/battery tester
• Charts showing various mobile phone repair tools and their names
• Safety goggles
• Work gloves

Rationale for the Lesson

This lesson is important as it introduces students to the practical aspects of mobile phone repair by familiarizing them with essential tools. Understanding the function of each tool is fundamental for effective repair work, while knowledge of safety precautions and proper handling ensures personal safety and tool longevity. This foundational knowledge supports future practical skills development in computer hardware and GSM repairs.

Prerequisite/Previous Knowledge

Students should have a basic understanding of what mobile phones are and a general idea of simple tools used for fixing things.

Lesson Content/Board Summary

Functions of Tools Used For Mobile Phone Repairs

Common Mobile Phone Repair Tools and Their Functions

Mobile phone repair involves using various specialized tools. Each tool has a specific function that aids in diagnosing, disassembling, repairing, and reassembling mobile devices.

1. Precision Screwdriver Set: Used for opening mobile phones, which often have very small screws of different types (e.g., Phillips, Torx, Pentalobe).
2. Multimeter/Battery Tester: An electronic measuring instrument used to check voltage, current, resistance, and continuity in circuits. It helps diagnose electrical faults and test battery health.
3. Solder Iron (Soldering Iron): Used for melting solder to create strong electrical connections between components or to remove faulty components from the Printed Circuit Board (PCB).
4. Soldering Station: Provides controlled heat for the soldering iron, often with adjustable temperature settings for different soldering tasks.
5. Microscope/Magnifying Lens: Used to magnify tiny components and traces on the PCB, making it easier to inspect, solder, and repair small parts that are invisible to the naked eye.
6. PCB Holder/PCB Stand: A fixture designed to securely hold the mobile phone’s Printed Circuit Board (PCB) in place during repair, allowing for hands-free work.
7. Table Lamp: Provides adequate lighting to illuminate the work area, especially when working on intricate components.

Safety Precautions for Using Mobile Phone Repair Tools

Working with mobile phone repair tools requires careful attention to safety to prevent injuries and damage to devices. Key precautions include:

1. Always wear appropriate Personal Protective Equipment (PPE) such as safety goggles to protect your eyes from flying debris or solder splashes.
2. Ensure the work area is well-lit and well-ventilated, especially when soldering, to avoid inhaling fumes.
3. Handle sharp tools like screwdrivers and tweezers with care to prevent cuts.
4. Always unplug soldering irons when not in use and allow them to cool down completely before storing.
5. Avoid touching hot soldering iron tips or recently soldered components.
6. Use tools only for their intended purpose.
7. Be aware of static electricity, which can damage sensitive electronic components. Use anti-static mats and wrist straps if available.
8. Keep liquids away from electronic components and tools.

Proper Handling and Storage of Mobile Phone Repair Tools

Correct handling and storage extend the lifespan of tools and ensure they are readily available and in good condition for use.

1. Cleaning: Clean tools after each use to remove dirt, grease, or solder residue. A clean tool performs better and lasts longer.
2. Storage: Store tools in their designated cases, toolboxes, or organizers. This prevents damage, loss, and keeps them organized.
3. Protection: Protect delicate tools like precision screwdrivers and multimeter probes from being dropped or bent.
4. Soldering Iron Care: Keep the soldering iron tip clean and tinned (coated with a thin layer of solder) to prevent oxidation and ensure efficient heat transfer. Store it in its stand.
5. Battery Storage: Store mobile phone batteries in a cool, dry place, away from direct sunlight or extreme temperatures.
6. Avoid Over-tightening: Do not over-tighten screws with precision screwdrivers, as this can strip the screw head or damage the phone casing.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation, Group Work, Practical Activity.

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Activating prior knowledge, Questioning

Teacher’s Activity: The teacher greets the students and asks them to name some common tools they know are used for fixing things around the house. The teacher then introduces the topic: “Functions of Tools Used For Mobile Phone Repairs.”

Students’ Activity: Students respond by naming tools like screwdrivers, hammers, etc. They listen attentively to the introduction of the topic.

Learning Point: Introduction to repair tools

Step 2: Identification of Mobile Phone Repair Tools

Time: 8 minutes

Teaching Skill: Identification, Visual learning

Teacher’s Activity: The teacher displays various mobile phone repair tools (e.g., precision screwdrivers, multimeter, solder iron, magnifying lens) and shows charts. The teacher asks students, in groups, to identify the tools they see.

Students’ Activity: In groups, students observe the tools and charts, discussing and identifying the names of the tools.

Learning Point: Recognition of repair tools

Step 3: Discussion of Tool Functions

Time: 10 minutes

Teaching Skill: Explanation, Group discussion

Teacher’s Activity: The teacher guides a discussion on the function of each identified tool, explaining its specific use in mobile phone repair. The teacher encourages groups to discuss the uses of different types of hand tools.

Students’ Activity: Students participate in the discussion, explaining what they think each tool is used for and asking questions for clarification. They discuss in groups.

Learning Point: Functions of repair tools

Step 4: Safety Precautions

Time: 5 minutes

Teaching Skill: Instruction, Emphasizing safety

Teacher’s Activity: The teacher explains the importance of safety when using repair tools and states key safety precautions, demonstrating where applicable (e.g., wearing safety goggles).

Students’ Activity: Students listen and note down the safety precautions, asking questions about safe practices.

Learning Point: Mobile repair safety

Step 5: Proper Handling and Storage Demonstration

Time: 5 minutes

Teaching Skill: Demonstration, Modelling

Teacher’s Activity: The teacher demonstrates the proper handling of selected tools (e.g., how to hold a precision screwdriver, how to place a soldering iron in its stand) and explains how to store them correctly in a toolbox or case.

Students’ Activity: Students observe the teacher’s demonstration of proper handling and storage techniques.

Learning Point: Tool handling and storage

Step 6: Supervised Tool Use

Time: 3 minutes

Teaching Skill: Guided practice, Supervision

Teacher’s Activity: The teacher provides a simple task, such as opening a casing with a precision screwdriver or testing a battery with a multimeter, and supervises students as they attempt to use selected tools correctly.

Students’ Activity: Students carefully attempt to use the selected tools under the teacher’s supervision, practicing correct handling.

Learning Point: Practical tool application

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

1. Name three tools used in mobile phone repairs and state their functions.
2. Mention two safety precautions to observe when using a soldering iron.
3. How should a precision screwdriver be stored after use?
4. Demonstrate how to hold a multimeter correctly.

Students’ Activity: Students answer orally and in writing.

Learning Point: Assessment of tool knowledge

Step 8: Note-Taking

Time: 4 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides students to copy the essential Board Summary notes on the functions of tools, safety precautions, and handling/storage into their notebooks.

Students’ Activity: Students copy the notes carefully into their notebooks.

Learning Point: Recording lesson content

Step 9: Conclusion

Time: 3 minutes

Teaching Skill: Reinforcement

Teacher’s Activity: The teacher summarises the key points of the lesson, emphasizing the importance of knowing tool functions, safety, and proper handling for successful and safe mobile phone repairs. The teacher encourages students to practice identifying tools.

Students’ Activity: Students listen to the summary and ask any final questions.

Learning Point: Consolidation of learning

Continuous Assessment/Further Study

Type: Homework/Practice Exercise

Instruction: Answer the following questions and practice identifying tools at home if possible.

1. List five tools commonly used in mobile phone repair and describe one function for each.
2. Explain why it is important to wear safety goggles when working with mobile phone repair tools.
3. Describe the correct way to store a set of precision screwdrivers.
4. Research and write down the function of a “spudger” tool in mobile phone repair.

Lesson Keywords

• Precision Screwdriver – A tool with small tips used for opening tiny screws in mobile phones.
• Multimeter – An electronic device used to measure voltage, current, and resistance.
• Solder Iron – A tool used to melt solder for making electrical connections.
• PCB Holder – A stand that holds the phone’s circuit board steady during repair.
• Safety Precautions – Steps taken to prevent accidents or injury.
• Handling – The way a tool is used or managed.
• Storage – The act of keeping tools in a safe and organized place.

Differentiation

For weaker learners, the teacher will provide pre-labelled charts of tools and focus on identifying only 3-4 key tools and their primary functions. Faster learners can be challenged to research additional specialized tools not covered in the lesson and their uses, or to explain the difference between an analogue and digital multimeter.

Suggested Lesson Videos

For further understanding, search on YouTube for:
JSS1 mobile phone repair tools functions safety

Teacher Guide for Using This Lesson Plan

Before the lesson, ensure you have a variety of actual mobile phone repair tools available for students to see and touch, along with charts for visual aid. A faulty mobile phone can be useful for demonstrating disassembly and component identification. Begin by engaging students with familiar tools before introducing specialized mobile repair tools. Emphasize the practical application of each tool and the critical importance of safety precautions. During the supervised tool use, circulate around the classroom to provide individual guidance and correct any improper handling immediately. Encourage group discussion to foster collaboration and problem-solving skills. Ensure students copy the Board Summary accurately during the note-taking stage. Conclude by reinforcing the core concepts and encouraging continuous learning and safe practices.