All posts by Jestine Yong

• 
  LOGITECH Mouse Repaired

                    This Mouse LOGITECH Model Number: M-SBF96 was given to me with two complaints: The cursor was not moving fine in the Display. The right click was not working....

  • Posted March 26, 2016
  • 16
• 
  Completed Another Basic Electronics Troubleshooting and Repair Course

                  Just completed today another basic electronics troubleshooting and repairing course for 9 participants. Below are the photos taken during the 3 days course:   Likes(9)Dislikes(0)

  • Posted March 25, 2016
  • 4
• 
  IGBT Shorted In Tecnica 164 Welding Machine

                    A few days ago, I got a Tecnica 164 welding machine for service. The customer told me the machine die after several hours of using it. It simply...

  • Posted March 22, 2016
  • 15
• 
  4 tube Fluorescent desktop lamp with electronic ballast repair

                Lamp refused to start, no flicker. Opened it and found electronic ballast with the following markings: Landlite Electronic Ballast for Fluorescent Lamp EBCF-127-120V-LPF 120/60Hz 0.38A PL 27W Lamp Output Voltage:...

  • Posted March 22, 2016
  • 17
• 
  How To Measure Current With Your Scope

                  1. Your scope as a voltmeter Your oscilloscope is a voltmeter but also a special type of voltmeter. It is a voltmeter that not only allows you to measure...

  • Posted March 17, 2016
  • 29
• 
  Loud Sparking Sound In CRT TV Solved

                    The complaint of this Sharp CRT TV was very loud sparking sound inside the TV. For your information, loud sparking sound usually is due to leakage in the...

  • Posted March 17, 2016
  • 13
• 
  Not Common To See Duoyi DY294 Tester Taken Apart And Repair-Part 1

                    As a very interested Electronics repair engineer I love using new Test Gadgets and Digital Meters and new Testers in my Electronics Hobby at home. After all they...

  • Posted March 10, 2016
  • 38
• 
  Not Common To See Duoyi DY294 Tester Taken Apart And Repair-Part 2

                  Click HERE for part 1. After I previously discovered that Q1 C9013 wasn’t working and gave unexpected results on my M12864 Tester I was almost certain that it must...

  • Posted March 10, 2016
  • 29