A customer who sells electric Pressure cookers brought me a “return” unit for after-sales service. It had been sent back by a buyer because it was completely dead.
Upon opening the cooker, I
immediately noticed seriously burnt components on the power board. One
Zener diode, which I marked with an arrow for reference, was completely
shorted. I suspect this fault was the starting point that led to the damage.
At first, the extent of the burn almost discouraged me. But since the customer had brought two identical cookers, I decided to use the second one as a reference for the missing and damaged parts.
The faulty components were:
- 12V Zener diode
- 47Ω 2W resistor
- 1MΩ resistor
Luckily, I had all of them readily
available in my shop.
After replacing the three
components, I powered the cooker through my series current-limiter bulb.
The bulb stayed dim — a good sign that there were no other major shorts. Then,
I heard a reassuring click from the relay, and the display lit up.
That was my moment of victory — the
Kenwood cooker was alive again!
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