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All posts by Jestine Yong

  • Digitor Multimeter Repair

                  Some repairs are simple. Some repairs are created difficult if someone else has been there before you, attempted an unsuccessful repair or have actually created the problem that you now...

    • Posted April 2, 2020
    • 15
  • Corrosion In Rechargeable Batteries
    Corrosion In Rechargeable Batteries

                  A relative of mine brought this beard shaver for repair. As he plugs it into power, there was an indication of a LED charging light but the shaver does not...

    • Posted April 2, 2020
    • 6
  • Modifying BPL M9903-Two-In-One To House USB Unit In Place Of Tape

                    This two-in-one of BPL make was brought to me for servicing stating that the sound was intermittent and there were a lot of crackling noises. Working on a set...

    • Posted March 30, 2020
    • 18
  • 31.8 vdc
    31.8 VDC Is Not Good Enough To Power Up LED TV Backlight

    This Singer 32″ LED TV came in for repair with the complaint of no display but have power with green power LED lighted up. For your information, no display fault can be caused by many factors such...

    • Posted March 28, 2020
    • 7
  • crt television repair
    Track Served As A Fuse To Save CRT TV From Lightning

    This Sharp 20” CRT TV was brought to me in dead condition, after a lightning strike. As usual, my first job was to clean up the in and out of TV, which I did. Removed the PCB...

    • Posted March 28, 2020
    • 16
  • microwave oven transformer
    An Unusual Microwave Oven Symptom Repaired

                  A friend of mine approached me when I was picking up my son from school and asked me about his microwave oven. He had the oven in the trunk of...

    • Posted March 28, 2020
    • 8
  • Replacing Working Components In Switch Mode Power Supply

                The OLAN 22″LCD TV came in with the complaint of no power symptom. Once the cover was removed I saw four circuit boards: Inverter Board Power Supply Board Main board USB...

    • Posted March 23, 2020
    • 17
  • microcontroller relay circuit
    Working Of Relay And Its Interfacing With 8051 Microcontroller

                      What is relay and why we need to use it: Relay is an electromagnetic switch operated by DC voltage to switch between the devices. Relay consist on a...

    • Posted March 23, 2020
    • 5
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