Practical: Disabling a Phone – JSS1 Computer Hardware & GSM Repair Lesson Note (Second Term)

Opening a phone (disassembly) is the careful process of taking a phone apart to see and name its inside parts, then putting it back together without damage.

Behavioural objectives

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

1. Prepare a safe and tidy workspace for phone repair.
2. Name the tools used to open a phone.
3. Open a phone in the correct order of steps.
4. Identify the main parts inside a phone.
5. Put a phone back together correctly.
6. State the safety rule for a swollen battery.

How do you set up a workspace for phone repair?

A workspace is a clean, flat area where all tools and screws are kept in order before the phone is opened.

• The surface: work on a flat, clean table.
• The mat: use a white sheet of paper or a rubber mat so tiny screws are easy to see and do not roll away.
• The tray: keep a small tray or a magnet for the screws.
• Good habit: a good technician is an organised technician.

What tools are used to open a phone?

Three basic tools are used to open a phone: a precision screwdriver set, a plastic prying tool and a screw tray.

What are the steps for opening a phone?

Most phones are opened in three steps: power down and remove extras, unscrew, then pry the case. Every phone is a little different.

Step A: Power down and remove extras

• Switch off: make sure the phone is fully switched off first.
• Remove the SIM card tray: take out the SIM card and keep it safe.
• Remove memory cards: take out any memory card.
• Back cover: if it is removable, pop it off with your fingernail or a plastic tool.

Step B: Unscrewing

• Find the screws: look for the tiny screws around the body.
• Use the correct screwdriver: it is usually a star or cross shape.
• Tip: keep the screws in the order you removed them, because some screws are longer than others.

Step C: Prying the case

• Use the plastic tool: move gently around the edge of the phone.
• Listen for clicks: small clicks show that the plastic clips are letting go.
• Never use a knife: it scratches the phone and can cut the battery.

What parts are found inside a phone?

Inside, a phone looks like a tiny, crowded city of parts joined together on one main board.

How do you put a phone back together?

Reassembling means closing the phone in the right order, and it is as important as opening it.

1. Check for dust: use a soft brush to clear any dust before closing.
2. Snap the clips: press the front and back together gently until you hear them click.
3. Replace the screws: put each screw back in its correct hole. Do not over-tighten them.
4. Final test: insert the SIM tray and try to power on the phone.

What is the class practical activity?

In small groups, students open a “dead” phone and name its parts.

1. In your small groups, take the “dead” phone provided.
2. Remove the back cover and the battery.
3. Point to and name the motherboard and the charging port.
4. Write down how many screws you found inside the phone.

What safety rules must you follow?

The most important rule is to stop and tell the teacher if a battery looks swollen.

• Swollen battery: if a battery looks swollen or “puffy”, do not try to remove it. Tell the teacher immediately.
• No sharp tools: never pry with a knife.
• Be gentle: force can break clips and cables.
• Keep screws safe: lost screws can leave the phone loose or damaged.

Evaluation

1. Name three tools used to open a phone.
2. List the three steps for opening a phone in order.
3. Why should you never use a knife to open a phone?
4. State the job of the motherboard and the antenna.
5. What should you do if you see a swollen battery?

Assignment

Write the four steps for putting a phone back together in your notebook, in the correct order. Give one reason for each step.