Mobile Repairing Course

Lesson 1 • Power and Battery Architecture

Covers battery chemistry, power management ICs, and charging circuits. Provides the foundation for diagnosing power-related failures covered in later chapters.

Lesson 2 • Connectivity and Sensor Modules

Surveys cellular, Wi-Fi, Bluetooth, GPS, and sensor subsystems. Links module functions to common connectivity complaints encountered in repair scenarios.

Lesson 3 • Display and Touch Systems

Explains LCD, OLED, and touch digitizer technologies and their signal paths. Prepares students to distinguish display faults from touch controller faults.

Lesson 4 • Smartphone Hardware Overview

Introduces the physical layout of modern smartphones and the role of each major component. Establishes the anatomical baseline needed for all subsequent disassembly work.

Lesson 1 • Hand Tools and Opening Techniques

Covers screwdrivers, spudgers, picks, and suction cups used to open devices safely. Correct tool selection prevents cosmetic and structural damage during disassembly.

Lesson 2 • Workspace Organisation and Safety

Defines ergonomic layout, chemical safety, and fire prevention for the repair bench. A well-organised workspace reduces errors and protects technician health.

Lesson 3 • Soldering and Rework Equipment

Introduces soldering irons, hot-air stations, and flux used in component-level repair. Proper equipment setup is prerequisite to all soldering tasks in later chapters.

Lesson 4 • Electrostatic Discharge Prevention

Explains how ESD damages components and how to eliminate static risk in the workspace. Directly prevents the most common technician-caused failures during repair.

Lesson 1 • Modular Component Removal and Replacement

Guides removal and reinstallation of screens, batteries, cameras, and charging ports. Students practice on multiple device models to build transferable technique.

Lesson 2 • Connector and Flex Cable Handling

Explains ZIF, LIF, and board-to-board connector types and safe disconnection methods. Proper technique eliminates the leading cause of technician-induced damage.

Lesson 3 • Reassembly Quality Checks

Establishes a post-reassembly verification routine covering fit, function, and cosmetics. Systematic checks catch errors before the device is returned to the customer.

Lesson 4 • Adhesive and Clip Removal Techniques

Covers heat application, adhesive softeners, and clip-release sequences for glued and clipped assemblies. Mastery prevents cracked screens and torn flex cables during opening.

Lesson 1 • Diagnosing Display Faults

Teaches systematic fault isolation for no-image, partial-image, and colour-distortion symptoms. Accurate diagnosis prevents unnecessary part replacement and reduces repair cost.

Lesson 2 • Waterproofing Restoration After Screen Repair

Covers adhesive gasket replacement and IP-rating restoration after display work. Restoring the seal protects the device from moisture ingress after repair.

Lesson 3 • LCD Assembly Replacement

Covers full LCD assembly swap including frame separation and adhesive reapplication. Students achieve factory-quality fit and image quality after replacement.

Lesson 4 • Touch Digitizer Separation and Bonding

Explains OCA bonding, digitizer separation, and optical clear adhesive reapplication. Students restore touch sensitivity without bubbles or delamination.

Lesson 1 • Battery Health Assessment

Uses software tools and voltage measurements to evaluate battery capacity and cycle count. Accurate assessment determines whether replacement is warranted before disassembly.

Lesson 2 • Wireless Charging System Repair

Covers wireless charging coil, receiver IC, and NFC coil interaction in modern devices. Students diagnose and replace wireless charging modules efficiently.

Lesson 3 • Charging Port and Cable Fault Diagnosis

Isolates faults between the charging port, cable, charger, and charging IC. Systematic isolation avoids replacing functional parts unnecessarily.

Lesson 4 • Power Management IC Troubleshooting

Introduces PMIC fault patterns including no-boot, short-circuit, and voltage-rail collapse. Students use a DC power supply to map current draw and isolate the fault.

Lesson 1 • Proximity, Ambient Light, and Face ID Sensors

Explains sensor calibration requirements and the impact of improper screen replacement on sensor function. Students restore sensor accuracy after display and housing repairs.

Lesson 2 • Microphone and Speaker Fault Isolation

Uses tone generators and loopback tests to isolate microphone and speaker faults. Audio path knowledge prevents misdiagnosis between hardware and software audio issues.

Lesson 3 • Earpiece and Vibration Motor Repair

Addresses earpiece speaker replacement and linear resonant actuator swap procedures. Small component handling skills developed here apply across many repair scenarios.

Lesson 4 • Fingerprint Sensor Repair and Pairing

Covers capacitive and optical fingerprint sensor replacement and the pairing process required by modern security architectures. Students navigate OEM pairing restrictions effectively.

Lesson 1 • Soldering and Desoldering Techniques

Covers drag soldering, hot-air reflow, and wick desoldering for SMD components. Consistent technique prevents pad lift and thermal damage to adjacent components.

Lesson 2 • Board Cleaning and Corrosion Repair

Covers ultrasonic cleaning, isopropyl scrubbing, and corrosion treatment for liquid-damaged boards. Thorough cleaning is often the decisive step in recovering water-damaged devices.

Lesson 3 • BGA Chip Removal and Reballing

Explains BGA underfill removal, chip extraction, pad cleaning, and ball placement. Successful reballing restores chips that fail due to cold joints or physical stress.

Lesson 4 • Common IC Replacement Procedures

Guides replacement of charging ICs, audio codecs, and touch controllers on the logic board. Students apply schematic knowledge to confirm correct part orientation and placement.

Lesson 1 • Operating System Fault Identification

Distinguishes boot loops, crash patterns, and app conflicts caused by software from hardware symptoms. Accurate software vs. hardware triage prevents unnecessary physical repair.

Lesson 2 • Bootloader and Root Management

Explains bootloader unlock procedures, root access implications, and re-locking for warranty restoration. Students advise customers accurately on security and warranty trade-offs.

Lesson 3 • Device Activation and Account Unlock

Addresses carrier lock removal, Google and Apple account lock scenarios, and legitimate unlock pathways. Students identify which locks are resolvable and which require customer action.

Lesson 4 • Firmware Flashing and Recovery

Covers stock firmware download, flash tool setup, and recovery mode flashing procedures. Students restore bricked devices to full operation without data loss where possible.