A couple years ago one of my viewers contacted me, and asked if I had any idea why the bridge rectifier in his power supply blew up while he was testing it. Unfortunately he had plugged the meter probes from his meter into the current measuring ports, and didn’t understand Continue reading Your Multimeter Can Blow Things Up.
The Drone in this video is the Hubsan X4 Desire, Model number H502E. This particular Drone has been brought in my shop with a burnt out motor on Three occasions. Considering how new it is, I figured the motor would have lasted much longer, but after witnessing the circumstances which Continue reading Drone motor failure from over current. What to avoid.
http://davestv.jestinemichellepow.click2sell.eu When ohms law was first explained to me, I was clueless about how it could actually be useful in real life. Even though the math was simple enough, somehow I failed to grasp how it could be useful in troubleshooting or designing circuits. Fortunately a situation Continue reading Troubleshooting bad circuits using ohms law.
This video is about what can happen if you install a repair kit, and fail to detect what caused the components to go bad in the first place.
Beginners in electronic troubleshooting often make the mistake of testing voltages from the wrong ground, so I thought it would be a good idea to cover this in greater detail. Jestine Yong published a book on switch mode power supplies which I found to be very helpful Continue reading Understanding the hot and cold side of a switch mode power supply.
I’d like to thank everyone for subscribing ot my channel, and for all the technicians who have helped me fine tune some of my own troubleshooting skills.
I discovered their importance of Isolation Transformers in the school of hard knocks. At that time of this educational experience I had just started working as an apprentice in a television repair shop, and my boss asked me to hook up a our oscilloscope to a TV he was repairing. Continue reading Isolation Transformers can save your life, and your equipment.
There have been many occasions where I’ve found hot air and or freeze spray can be helpful in troubleshooting intermittent circuit board issues, or intermittent LCD displays problems. Here was one such instance where I applied a little heat to the edge of the display, and observed that the Continue reading Using freeze spray or hot air to troubleshoot Circuit Boards and LCD display problems.
One of the nice things about learning how to troubleshoot Televisions is many of the troubleshooting skills we learned can apply to repairing a variety of other devices. In this case a Dentist brought in a motorized shaker used to mix amalgam fillings.
While examining the circuit board I noticed a Continue reading Dental Equipment Repair. Water damage.
Many years ago I began using an inductive telephone pickup device to detect if a particular circuit board had power going to it. If the circuit being tested only had steady DC across every component the inductive probe would not be of much value, but in most modern circuits Continue reading Inductive circuit probe you can build.