PCB Maintenance Course

Lesson 1 • Component Categories and Packaging

Identifies through-hole and surface-mount component families and their package types. Provides the component literacy needed for diagnosis and repair tasks.

Lesson 2 • Workplace Safety and ESD Control

Establishes electrostatic discharge risks, personal protective equipment, and safe handling protocols. Prevents damage before any hands-on work begins.

Lesson 3 • PCB Materials and Substrates

Examines substrate materials, copper weights, and surface finishes. Connects material properties to failure modes addressed in later chapters.

Lesson 4 • Reading Schematics and PCB Layouts

Teaches schematic symbols, reference designators, and layout views. Enables technicians to trace circuits and locate components on physical boards.

Lesson 1 • Power Supply and Load Testing

Demonstrates bench power supply use for controlled board power-up and current monitoring. Identifies short circuits and excessive current draw safely.

Lesson 2 • Digital Multimeter Mastery

Covers all multimeter functions relevant to PCB work, including diode and continuity modes. Forms the measurement baseline for all subsequent diagnostic chapters.

Lesson 3 • LCR Meters and Component Analyzers

Explains in-circuit and out-of-circuit measurement of passive components. Supports accurate component verification before and after repair.

Lesson 4 • Thermal Imaging and Infrared Tools

Introduces thermal cameras and contact thermometers for locating hot components. Bridges electrical measurement with physical fault localization.

Lesson 1 • Surface-Mount Hand-Soldering

Covers drag soldering, tack-and-reflow, and fine-pitch IC hand placement. Builds the precision skills required for SMD repair and rework.

Lesson 2 • Solder Alloys and Flux Chemistry

Explains leaded and lead-free alloys, flux types, and their effect on joint quality. Correct material selection is critical for reliable and compliant repairs.

Lesson 3 • Soldering Iron Selection and Setup

Covers tip types, temperature settings, and station calibration for different joint sizes. Proper setup prevents thermal damage and poor joint quality.

Lesson 4 • Through-Hole Soldering Techniques

Teaches correct heat application, solder feed, and joint inspection for through-hole parts. Establishes the manual dexterity baseline for surface-mount work.

Lesson 1 • Visual Inspection Techniques

Teaches systematic board inspection for physical defects before applying power. Catches obvious faults early and guides subsequent electrical testing.

Lesson 2 • Structured Troubleshooting Frameworks

Introduces divide-and-conquer, signal-tracing, and symptom-based diagnostic models. Provides a repeatable mental framework for approaching any board failure.

Lesson 3 • Power Rail and Signal Path Analysis

Maps voltage rails and signal paths to locate faults in power distribution and logic. Connects measurement skills from Chapter 2 to real fault scenarios.

Lesson 4 • Fault Documentation and Root Cause Analysis

Establishes practices for recording findings, root causes, and corrective actions. Supports quality systems and prevents repeat failures on the same board.

Lesson 1 • SMD Component Removal with Hot Air

Teaches hot-air rework station setup and nozzle selection for SMD removal. Correct airflow and temperature profiles protect adjacent components. NO_CHANGES

Lesson 2 • Land Pad Repair and Restoration

Restores lifted, damaged, or missing pads using epoxy, copper tape, and jumper wires. Ensures a reliable solder surface before placing replacement components.

Lesson 3 • BGA and QFN Removal Techniques

Addresses infrared and hot-air reflow methods for area-array packages. These high-risk operations require precise thermal profiling to avoid board delamination.

Lesson 4 • Through-Hole Component Removal

Covers desoldering pump, wick, and vacuum desoldering station use for through-hole parts. Prevents pad and barrel damage during removal operations.

Lesson 1 • Conformal Coating Types and Selection

Compares acrylic, silicone, polyurethane, and epoxy coatings by protection level and repairability. Correct selection balances environmental protection with future rework access.

Lesson 2 • Coating Inspection and Repair

Uses UV light and visual inspection to verify coating coverage and detect defects. Teaches localized coating removal for rework access and recoating after repair.

Lesson 3 • Coating Application Methods

Covers brush, spray, dip, and selective coating application techniques. Consistent coverage thickness prevents voids and pooling that reduce protection.

Lesson 4 • Ionic Contamination Testing

Explains resistivity-of-solvent-extract testing and ion chromatography for cleanliness verification. Quantifies contamination levels against accepted cleanliness thresholds.

Lesson 1 • Fine-Pitch IC and QFN Rework

Addresses stencil printing, placement, and reflow for fine-pitch QFP and QFN packages. Thermal and alignment precision requirements exceed standard SMD rework.

Lesson 2 • Thermal Profiling for Rework

Develops rework thermal profiles using thermocouple data and reflow curve analysis. Correct profiling prevents cold joints, delamination, and component damage.

Lesson 3 • BGA Reballing and Site Preparation

Covers solder ball removal, pad cleaning, and reballing using stencils and preforms. Proper site preparation is the foundation of a reliable BGA replacement.

Lesson 4 • BGA Placement and Reflow

Teaches X-ray-guided placement, flux deposition, and controlled reflow for BGA devices. Precise alignment and thermal control determine joint reliability.

Lesson 1 • Calibration and Tool Qualification

Covers calibration schedules, records, and out-of-tolerance response for maintenance tools. Calibrated tools ensure measurement accuracy and process repeatability.

Lesson 2 • Continuous Improvement in Maintenance

Introduces defect Pareto analysis, corrective action processes, and process capability metrics. Drives measurable reduction in repeat failures and repair cycle time.

Lesson 3 • Quality Standards and Workmanship Criteria

Applies industry workmanship standards to define acceptance criteria for repaired assemblies. Aligns maintenance output with original manufacturing quality expectations.

Lesson 4 • Maintenance Documentation and Traceability

Establishes work order systems, repair logs, and component traceability records. Documentation supports warranty claims, audits, and failure trend analysis.