Page 42 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

EXERCISE 126: Replace various faulty parts like Mic,
Speaker, Data Hanging Audio Jack etc.

Objectives

At the end of this exercise you shall be able to:
• to identify and replace the various faulty parts in a cell phone
• to understand replacing faulty speaker and mic of a cell phone
• to understand replacing data and audio jack of a cell phone
• to restore the functionality of the device and ensure smooth operation.

Requirements

Tools/Materials
• Precision screwdriver set - 1 Set. • Replacement parts - as reqd.
• Tweezers - 1 Pair. • Magnifying glass - 1 No.
• Plastic opening tools - 1 Set. • Smart Phone - 1 No.
• Heat gun - 1 Set. • Digital Multimeter with probes - 1 No.
• Soldring iron - 1 No. • User Manual of the given cell phone - 1 No.
• Desoldring pump - 1 No.

Procedure

1 Diagnosis: Identify which parts are faulty by troubleshooting the device. Test the microphone, speaker, and
audio jack to determine which components need replacement.
2 Disassembly: Power off the device and remove any external components (e.g., case, battery). Use appropriate
tools to carefully open the device without damaging the casing.
3 Component Removal: Locate the faulty parts within the device. Use a screwdriver to remove any screws
holding the components in place. Disconnect any cables or connectors attached to the faulty parts.
4 Replacement: Install the new microphone, speaker, or audio jack by connecting it to the device and securing
it in place with screws. Ensure proper alignment and connection of cables.
5 Reassembly: Put the device back together by reversing the disassembly steps. Make sure all screws are
tightened securely and all components are properly aligned.
6 Testing: Power on the device and test the replaced parts to ensure they are functioning correctly. Test the
microphone, speaker, and audio jack to verify that the issues have been resolved.
7 Final Checks: Double-check all connections and ensure that the device is fully functional before reapplying
any external components or accessories.
Working :

1 Diagnosis: Identify the malfunctioning components through testing and troubleshooting.
2 Preparation: Gather the necessary tools and replacement parts.
3 Disassembly: Power off the device and carefully open it using appropriate tools, such as screwdrivers and
plastic opening tools, without damaging the casing.
4 Component Removal: Locate and remove the faulty parts by unscrewing them and disconnecting any cables
or connectors attached to them.

5 Replacement: Install the new microphone, speaker, or audio jack by connecting them properly and securing
them in place with screws.
6 Reassembly: Put the device back together by reversing the disassembly process, ensuring all components
are correctly aligned and all screws are tightened securely.

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CITS : E & H - Electronics Mechanic - Exercise 125