LED TV Repairing Course

Lesson 1 • Essential Hand and Specialty Tools

Identifies screwdrivers, spudgers, suction cups, and soldering equipment needed. Proper tool selection reduces panel damage and speeds disassembly.

Lesson 2 • Test and Measurement Equipment

Covers multimeters, oscilloscopes, and LED testers used in diagnosis. Accurate measurement is the foundation of evidence-based fault finding.

Lesson 3 • Workspace Organisation and Documentation

Establishes a clean, organised bench layout and part-tracking system. Good documentation habits reduce reassembly errors and support warranty tracking.

Lesson 4 • ESD Prevention and Handling

Explains electrostatic discharge damage to ICs, T-con boards, and panels. Proper grounding and packaging prevent invisible component failures.

Lesson 1 • Power Supply Architecture Overview

Introduces standby, main, and backlight power rails found in all LCD/LED sets. Establishes voltage reference points used throughout the repair course.

Lesson 2 • LCD Panel Structure and Operation

Explains liquid crystal alignment, polariser layers, and pixel control. Connects panel physics to common failure symptoms technicians encounter.

Lesson 3 • History and Evolution of Flat Panels

Traces CRT-to-LCD-to-LED progression and key milestones. Provides context for why modern repair techniques differ from legacy methods.

Lesson 4 • LED Backlighting Systems

Covers edge-lit and direct-lit LED configurations and their driver circuits. Understanding backlight types guides fault isolation in brightness and uniformity issues.

Lesson 1 • Block Diagram Interpretation

Teaches reading of functional block diagrams showing board interconnections. Block diagrams provide the first-level map for signal and power tracing.

Lesson 2 • Schematic Symbols and Conventions

Covers standard symbols for resistors, capacitors, transistors, ICs, and connectors. Symbol fluency is required before any circuit-level diagnosis.

Lesson 3 • Tracing Circuits on Schematics

Applies schematic reading to follow voltage rails and signal paths step by step. This skill directly enables pinpointing faults to specific components.

Lesson 4 • Types of Service Documentation

Distinguishes service manuals, exploded-view diagrams, and schematic packs. Knowing which document to use accelerates diagnosis for any TV model.

Lesson 1 • Signal Tracing with an Oscilloscope

Uses oscilloscope waveforms to verify PWM signals, LVDS data, and clock lines. Waveform analysis distinguishes driver faults from panel faults precisely.

Lesson 2 • Visual Inspection Techniques

Covers inspection of PCBs for burnt components, swollen capacitors, and cold joints. Visual inspection often reveals the fault before any measurement is taken.

Lesson 3 • Voltage and Resistance Measurement

Applies multimeter techniques to verify power rails and component values in-circuit. Measurement results confirm or eliminate suspected fault areas systematically.

Lesson 4 • Divide-and-Conquer Fault Isolation

Applies binary fault isolation to narrow defects to a single board or component. This method minimises unnecessary part replacements and repair time.

Lesson 1 • Diagnosing No-Power Conditions

Guides step-by-step testing from fuse through primary and secondary stages. Systematic testing identifies whether the fault is in primary or secondary circuits.

Lesson 2 • Backlight LED Driver Circuits

Covers boost converter and constant-current driver ICs that power LED strips. Repairing driver circuits resolves dim, flickering, and no-backlight faults.

Lesson 3 • Standby and Protection Circuit Faults

Addresses over-voltage, over-current, and thermal shutdown circuits that prevent startup. Disabling protection temporarily confirms whether protection is the fault source.

Lesson 4 • Power Supply Topologies in TVs

Explains flyback, LLC resonant, and PFC converter designs used in TV PSUs. Topology knowledge determines which components to prioritise during diagnosis.

Lesson 1 • T-Con Board Diagnosis and Repair

Identifies T-con faults causing half-screen, lines, and no-image with backlight present. T-con repair requires precise LVDS signal verification and IC-level replacement.

Lesson 2 • BGA and SMD Rework Techniques

Introduces hot-air and infrared rework for reflowing and replacing BGA ICs. Proper thermal profiling prevents panel and PCB damage during rework operations.

Lesson 3 • Main Board Architecture and ICs

Maps the scaler IC, memory, tuner, and audio processor on the main board. Understanding IC roles directs diagnosis to the correct device quickly.

Lesson 4 • Diagnosing No-Signal and Input Faults

Tests HDMI, USB, and RF input circuits for signal continuity and IC response. Input fault diagnosis distinguishes connector damage from IC-level failure.

Lesson 1 • Panel Replacement Decision Making

Establishes cost-benefit criteria for replacing vs. repairing a damaged panel. Students calculate repair viability and communicate options clearly to customers.

Lesson 2 • Backlight Strip Replacement

Covers safe panel disassembly, LED strip removal, and new strip installation. Correct strip matching and reassembly eliminate brightness uniformity faults.

Lesson 3 • Flex Cable and COF Repair

Addresses broken flex cables and chip-on-film failures causing line defects. Flex repair and COF reflow are cost-effective alternatives to full panel replacement.

Lesson 4 • Panel Defect Classification

Categorises vertical lines, horizontal lines, dead zones, and backlight bleed defects. Accurate classification determines whether the fault is in the panel or T-con.

Lesson 1 • Advanced Power Sequencing Faults

Analyses multi-rail startup sequences and identifies which rail failure causes shutdown. Oscilloscope-based sequencing analysis pinpoints faults invisible to static measurement.

Lesson 2 • Smart TV Operating System Basics

Introduces Android TV, Tizen, WebOS, and proprietary OS architectures used in smart sets. OS knowledge is required to distinguish software faults from hardware failures.

Lesson 3 • Firmware Update and Recovery

Covers USB firmware flashing, recovery mode entry, and full factory reset procedures. Firmware recovery resolves boot loops, frozen menus, and app crash faults.

Lesson 4 • Network and Connectivity Faults

Diagnoses Wi-Fi module, Ethernet port, and Bluetooth failures in smart TVs. Network repair restores streaming, screen mirroring, and smart home integration.