All posts by Jestine Yong

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  A Shorted Mosfet 2SK2837 Found In Welding Machine 

  This machine was brought to my shop for repair by a welding technician but was put on my shelf for a while till I get the ok from the customer to go ahead with the repair. It...

  • Posted June 28, 2021
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  Nostalgic And Fascinating AM RADIO From A Single Chip TA7642!

              I take a break once in a while away from my monotonous service work and involve myself in assembly. I think I can comfortably say that Radio is as fascinating today...

  • Posted June 23, 2021
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  32 inch LG Television Model 32LH20R Dead, Now Repaired

                I received a phone call from my neighbor who wanted his television checked by a technician. I passed by his place, ushered in and shown the television. I applied the...

  • Posted June 23, 2021
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  A Treadmill With (E1) Error Repaired and Maintained. Model: York

  As I was picking up my nephew from the Kindergarten, a teacher approached me with the question if I repair treadmills and of course I asked him to bring the board to the shop for full check...

  • Posted June 23, 2021
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  Making A Working Jim Williams Based Pulse Generator

  Recently I started making one of those famous Jim Williams based avalanche fast rise pulse generators. I therefore bought a set that consisted out of 3 OSH PARK pulse generator boards. And all info including the part...

  • Posted June 18, 2021
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  Return Of Panasonic RX-M70M2 Two-In-One With Mains Transformer Failure

            This set belonged to one of my regular customers and he brought it with the complaint that his wife saw smoke coming out from the rear and the set became dead. This...

  • Posted June 18, 2021
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  Something Exploded Inside The Welding Machine

              The welding technician explained as he brought this welding machine to be fixed; while the machine was powered on but in operation something exploded inside and the machine went into shut...

  • Posted June 18, 2021
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  Defective And Discontinued Microcontroller Functions Bypassed In Bang & Olufsen Tape Deck

                This has a very long story behind it, but I would make it as brief as possible, without compromising on essential detailing of trouble shooting and rectification done. This belonged...

  • Posted June 14, 2021
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