LED TV Repairing Course

Lesson 1 • LED TV Block Diagram Overview

Introduces the functional block diagram showing signal path from antenna to panel. Students map each block to a physical board inside the set.

Lesson 2 • Evolution of Display Technology

Traces CRT to LCD to LED progression, highlighting key engineering shifts. Provides context for why LED TVs dominate modern repair workloads.

Lesson 3 • Types of LED Backlighting

Covers edge-lit, direct-lit, and full-array local dimming designs. Understanding backlight type determines correct fault diagnosis strategy.

Lesson 1 • Multimeter and Oscilloscope Use

Trains students to measure voltage, resistance, continuity, and waveforms accurately. These measurements form the backbone of every diagnostic procedure.

Lesson 2 • Electrical Safety and ESD Protection

Establishes safe working practices around mains voltage, capacitor discharge, and ESD. Following these protocols protects both the technician and the TV under repair.

Lesson 3 • Soldering and Desoldering Equipment

Introduces soldering stations, hot-air rework stations, and desoldering pumps. Proper equipment setup ensures reliable solder joints and safe IC removal.

Lesson 1 • Reading Schematics and PCB Layouts

Teaches schematic symbols, net labels, and PCB layer conventions used in service manuals. Students trace signal paths from schematic to physical board.

Lesson 2 • Signal Types in LED TVs

Distinguishes analog, digital, PWM, and I2C signals present on TV boards. Recognizing signal types directs the technician to the correct measurement tool.

Lesson 3 • Active Components and Semiconductors

Examines diodes, transistors, MOSFETs, and ICs used in TV power and signal stages. Students identify package types and pinouts from datasheets.

Lesson 4 • Passive Components in TV Circuits

Covers resistors, capacitors, inductors, and their roles in filtering and timing. Correct identification prevents misdiagnosis during fault isolation.

Lesson 1 • SMPS Topology and Operation

Explains flyback, half-bridge, and LLC resonant converter topologies used in TV PSUs. Understanding topology guides correct waveform and voltage expectations.

Lesson 2 • Voltage Rail Measurement Procedure

Provides a step-by-step sequence for measuring standby, 12 V, 24 V, and backlight rails. Correct measurement sequence prevents damage to downstream boards.

Lesson 3 • Common Power Supply Faults

Catalogs blown fuses, shorted MOSFETs, swollen capacitors, and failed PWM ICs. Each fault is linked to its symptom and a targeted test procedure.

Lesson 4 • Component Replacement on PSU Boards

Guides selection and installation of replacement capacitors, MOSFETs, diodes, and ICs. Correct part specification ensures long-term reliability after repair.

Lesson 1 • Audio Circuit Faults and Repair

Covers audio amplifier ICs, speaker output stages, and SPDIF output faults. Audio faults are isolated using signal injection and waveform measurement.

Lesson 2 • Main Board Architecture

Maps the SoC, tuner module, HDMI receivers, DDR memory, and eMMC flash on the main board. Understanding layout accelerates fault localization during diagnosis.

Lesson 3 • BGA and SMD Rework on Main Board

Introduces hot-air BGA reballing, SMD IC replacement, and pad repair techniques. These skills recover boards with failed SoCs or memory chips.

Lesson 4 • Firmware and Software Fault Recovery

Teaches factory reset, firmware flashing via USB, and EEPROM data recovery procedures. Software faults mimic hardware failures and must be ruled out first.

Lesson 1 • LVDS and eDP Signal Testing

Covers oscilloscope measurement of LVDS differential pairs and eDP lane signals. Signal integrity testing confirms whether the fault is on the main board or T-Con.

Lesson 2 • T-Con Component Replacement

Guides replacement of timing controller ICs, buffer ICs, and power supply capacitors on the T-Con. Correct part sourcing and soldering restore panel image quality.

Lesson 3 • Common T-Con Fault Symptoms

Links symptoms such as vertical lines, half-screen, and negative image to specific T-Con stages. Symptom-to-stage mapping reduces diagnostic time significantly.

Lesson 1 • Diagnosing Backlight Failure Symptoms

Covers dark screen with faint image, flickering, and partial backlight symptoms. Each symptom is traced to a specific driver stage or LED strip fault.

Lesson 2 • LED Strip Testing and Replacement

Teaches LED strip continuity testing, individual LED forward voltage measurement, and strip replacement. Correct strip specification prevents premature failure after repair.

Lesson 3 • Backlight Uniformity and Calibration

Addresses hot spots, dark corners, and uneven brightness after strip replacement. Calibration steps ensure the repaired backlight meets original uniformity standards.

Lesson 4 • Backlight Driver IC Replacement

Covers driver IC identification, cross-referencing, removal, and installation on the PSU or main board. Correct IC replacement restores stable backlight current regulation.

Lesson 1 • Systematic Fault Isolation Framework

Introduces a structured divide-and-conquer diagnostic method for multi-symptom faults. Applying this framework reduces average diagnosis time and prevents misdiagnosis.

Lesson 2 • Repair Estimation and Customer Communication

Teaches cost estimation, repair authorization, and clear fault explanation to customers. Professional communication builds trust and reduces disputes over repair charges.

Lesson 3 • Smart TV and Network Fault Diagnosis

Addresses Wi-Fi module failures, app crashes, and firmware corruption on smart platforms. Network and software faults require a different diagnostic approach than hardware faults.

Lesson 4 • Workshop Setup and Business Operations

Covers workbench layout, parts inventory management, and record-keeping for a repair business. Efficient operations increase throughput and profitability.