All posts by Jestine Yong

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  How To Test PWM Gate Drive Signal Pulse Using Single Bright LED

            It is difficult to check PWM IC working in SMPS without Oscilloscope. Came across trick for testing which give us indication if PWM generating Gate drive signal pulse or not. Reference Circuit...

  • Posted March 22, 2025
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  Shorted Backlight LED Drained Battery In LUVLAP Breast Feed Pump

            This breast pump was brought to me by one of my hospital colleagues stating that the battery was not getting charged. I opened the bottom by removing four screws underneath which is...

  • Posted March 22, 2025
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  A Samsung TV with No Backlight Repaired and Maintained

            This TV was brought to me for repair by a friend of mine and asked me to replace the backlight on it. I confirmed the fault by powering on the TV and...

  • Posted March 22, 2025
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  Dial Lamp Burning Solved In PHILIPS Valve (Tube) Radio MAESTRO 15RB677/01S

  This Radio has visited me for a major work which I have reported earlier. Kindly see the link: https://jestineyong.com/replaced-ift-with-imported-in-philips-valve-tube-radio-model-major/ This time the complaint was that the bulb gets burnt. Replacements of these types of 6.3V 150mA bulbs...

  • Posted March 22, 2025
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  Completed Another Advanced Electronics Repair Level 2 Course

  Completed today another Advanced Electronics Repair course for 2 participants. Below are the photos taken during the 3 days course: Likes(14)Dislikes(0)

  • Posted March 21, 2025
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  Unfruitful Attempt To Service A 55 Inch SuperGeneral LED TV Model SGLED55AUST2

          This TV belonged to a Senior Citizens Home in my town run by a Charitable Social Organization, in which I too am associated as an external supporter to the extent possible. The complaint...

  • Posted March 15, 2025
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  5 KW Domestic Stabiliser Repair

          This domestic stabiliser was brought to me with complaints of shutting down once its connected to load after few minutes. The customer said he uses it to power his water purifier machine, he...

  • Posted March 15, 2025
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  A Blue Tooth Speaker With Charging Port Ripped Off Repaired

                A friend of mine brought his blue speaker for repair and it was very clear that it has a charging issue since the charging port was missing. When the customer...

  • Posted March 15, 2025
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