About the Tech Circuit™
The Tech Circuit’s mission is to continuously improve and maintain the Field Technician’s electrical diagnostics aptitude. The need to provide electrical and electronic related diagnostic solutions in the field has become increasingly unavoidable. Developing an innate understanding of how electricity works greatly empowers you when encountering such scenarios. Below is a list of all Tech Circuit blogs and articles with the common goal of helping you become more proficient at electrical and electronic troubleshooting.
Alphabetical List of all Articles and Blogs to Date
120v Point-to-Point Troubleshooting Cheat Sheet – CLICK HERE
120V Point-to-Point Voltage Pen Diagnostics Cheat Sheet – CLICK HERE
240v Point-to-Point Troubleshooting Cheat Sheet – CLICK HERE
240 Volt Terminal Block Connections and Grounding Considerations – CLICK HERE
Appliance Circuits and Diagnostics – CLICK HERE
Appliance Technician Cheat Sheets – Full List – CLICK HERE
Basic Circuits FAQS – CLICK HERE
Basic Electricity and Diagnostics for Appliance Technicians – CLICK HERE
Compromised Voltage Sources – CLICK HERE
Control Boards- How do they Work? WR55X10942 Walkthrough – CLICK HERE
Diagnostic Fallacy of Referencing Neutral in 240v Circuits – CLICK HERE
Digital Microscope Images of Relay Contacts – CLICK HERE
Diodes and LED FAQS – CLICK HERE
Electrical Diagnostic Basics – Bare Minimum “Must-Know” Concepts for Appliance and HVAC Technicians
Electric Power FAQS – CLICK HERE
Electric Range – Electronics Cheat Sheet – CLICK HERE
Electricity – Talk the Talk – How to Articulate Electrical Behavior – CLICK HERE
Electrolytic Capacitors Failure and How they Affect Circuits – CLICK HERE
Electrolytic Capacitor Testing and Replacement Cheat-sheet – CLICK HERE
ESR Lookup Table Cheat Sheet – CLICK HERE
Four Ways Ohms can Lie – CLICK HERE
Fluke 116 Multimeter Review, Theory, and Tutorial – CLICK HERE
Frigidaire Range Board Repair – No Bake, No Broil – CLICK HERE
Fundamental Behavior of Voltage and Current – CLICK HERE
Ghost Voltage – What is it? – CLICK HERE
The High Startup Current of Single Phase Induction Motors- CLICK HERE
H-Bridge Demo using Transistors – CLICK HERE
How an Infinite Switch Works – CLICK HERE
How Knowledge of Electronics Theory Gives Technicians a Great Advantage – CLICK HERE
How LowZ Meters Work and Why They’re Useful – CLICK HERE
How to Check for a Floating Neutral with LoZ – CLICK HERE
How to Test Diodes – LEDs, Microwave, Zener, and Standard – CLICK HERE
Impedance – What is Impedance? – CLICK HERE
Indirect Component Testing Using Shared Electrical Points – CLICK HERE
Klein CL800 Multimeter Review, Theory, and Tutorial – CLICK HERE
Lab Results – Comparing Two Relays with Different Coil Resistance – CLICK HERE
Linear and Switching Power Supplies in Appliances – CLICK HERE
Line Voltage Testing Cheat Sheet – CLICK HERE
Losing L2 on an Electric Dryer – Equivalent Circuit and HiZ vs. LowZ Meter Testing – CLICK HERE
LoZ Meters – When NOT to use Them – CLICK HERE
Ohmic Self-Heating of Thermal Devices- CLICK HERE
Pattern Recognition vs. Diagnostics in Appliance and HVAC Repair – CLICK HERE
The Power of Perceived Value – Consistently Create Happy Customers
Reading Schematics – Whirlpool GAS Dryer Schematic Voltage Maps and Troubleshooting – CLICK HERE
Reading Schematics – Resistor Voltages and Current – CLICK HERE
Refrigerator Inlet Valve Diodes – How they Work – CLICK HERE
Relay Driver Circuit – Part 1 – CLICK HERE
Relay Substitution and Coil Resistance – CLICK HERE
Residential Line Voltage for Service Techs – CLICK HERE
Resistance is Not Futile – Tighten Those Connections – CLICK HERE
Resistors, Capacitors, Inductors, and Transistors – What are They Used for? – CLICK HERE
Samsung Dryer HC Error – Solved – CLICK HERE
Samsung Dryer HE Error – Solved – CLICK HERE
Semiconductor Testing Cheat Sheet – CLICK HERE
Series and Parallel Circuits FAQS – CLICK HERE
Series Circuit Troubleshooting Rules – CLICK HERE
Systematic Point-to-Point Voltage Drop Testing Cheat Sheet – CLICK HERE
Tech Guide to Single-Phase Induction Motors – CLICK HERE
Testing Diodes with a Multimeter – CLICK HERE
Thermistor Cheat Sheet – Common Value Tables and Charts – CLICK HERE
Triac Theory, Applications, and Troubleshooting – CLICK HERE
Unsustainability of Loose High-Current Connections – CLICK HERE
Video Explanation of How Coil Resistance Affects Boards – CLICK HERE
Video – Relay Driver Circuit – Part 2 – Failures and Troubleshooting – CLICK HERE
Video – Using Voltage Drops for Troubleshooting Appliances – CLICK HERE
Voltage, Current, and Resistance FAQS – CLICK HERE
War of the Currents – DC will Replace AC – CLICK HERE
What you Should Really Know about Inlet Valves and Icemakers – CLICK HERE
Zener Diode Testing with a Multimeter – CLICK HERE
Don’t forget:
“Diverting 10 min/day of social media time towards learning something new, is 5 hours of newfound monthly knowledge.” – SM
To DONATE to the Tech Circuit – CLICK HERE
Alphabetical Links to all Tech Circuit Articles and Blogs – CLICK HERE
Links to all Tech Circuit Cheat Sheets/Field References for Appliance/HVAC Techs – CLICK HERE
For additional electrical and electronics learning material for field techs, visit our homepage at http://www.TechCircuit.org or our Facebook group at https://www.facebook.com/groups/746823709133603.