All posts by Jestine Yong

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  A Shorted Surround Sound Amplifier Repaired

  A friend of mine who is a repair technician contacted me about a surround sound amplifier that he encountered but he does not have any kind of repair experience in such devices. The technician went further in...

  • Posted October 13, 2021
  • 13
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  Insects/Mosquitoes E-killer Saved From Waste Dump

              This Hongjian mosquitoes killer was brought to me by a neighbour with complaint of not working. Few months ago, it was repaired changing LEDs only. Now back on my work bench....

  • Posted October 13, 2021
  • 8
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  Obtaining EEprom Bios Firmware For Deadflashed LG GDR8163B DVD-ROM Drive

                    A few months ago my friend Marco brought me two LG GDR8163B DVD-ROM drives. One still working and the other one he had deadflashed over the Pata/IDE port...

  • Posted October 6, 2021
  • 18
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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
  • 12
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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
  • 10
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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
  • 40
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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
  • 12
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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
  • 8