All posts by Jestine Yong

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  A Missing Part In A Turkish Made Welding Machine Repaired

  A welding technician walked into my shop carrying his welding machine and a capacitor. With a smile on his face, he explained that this machine stopped working while he was welding and when he carried the machine...

  • Posted October 6, 2021
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  Makita Charger Repair

              I got this dead charger from another repair shop in town that was not successful in getting this charger fixed. The guy explained that he opened the device and looked for...

  • Posted October 6, 2021
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  Equivalent Series Resistor (ESR) Value in Electrolytic Capacitors 

                Equivalent series resistor (ESR) in electrolytic capacitor is an interesting topic. Electrolytic capacitors can be found in many circuits in a circuit board but in today’s article I’m going to...

  • Posted September 29, 2021
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  IGBT and Industrial Bridge Rectifier Shorted

  The machine was donated to me about two months ago because the customer thought it was too expensive to be repaired so he went and bought a new machine instead. I was planning to dismantle the machine...

  • Posted September 29, 2021
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  Electronic Circuit Turning On Itself Repaired

                A customer called me about a device that he owns. He explained that during the night he woke up to a sound of a machine working which he realized later...

  • Posted September 29, 2021
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  Functions Of RC Snubber Circuit In SMPS

  In my last article you have learned about the functions of the electrolytic and non-polarity capacitor (connected parallel) in the DC output line of a switch mode power supply (SMPS). In today’s article I will show you...

  • Posted September 23, 2021
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  Making Small DIY Hot Plate Using Door Stopper Tower Bolt

              We found while desoldering, some SMD component is having solder joint underneath that  it is difficult to remove the component using soldering Iron. So this I made trick to make hot...

  • Posted September 23, 2021
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  Suoer Digital Meter That Does Not Easily Power On

  It is my digital meter that was purchased about a year ago, that refused to power on, I guess the power switch is faulty. So I decided to repair it. Open it up and this is the...

  • Posted September 23, 2021
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