Good friends, this time I will share a tutorial or trick on how to change the HP charger output voltage from the original 5 Volt DC to 12 Volt DC.
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️DANGER⚠️
*For elco output, it can be replaced with a larger voltage capacity capability, if previously on the default charger the voltage capacity was too small. For example, replaced with 25 Volts or 50 Volts. Elco voltage capacity must be greater than the charger output voltage.
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OK, I'll explain briefly. So coincidentally in the charger module circuit in this video, the zener diode on the PCB board is D2 and is located on the primary side.
Then the zener diode symbol on the PCB is also swapped (for the correct zener diode symbol it is in D3).
But D3 is not a zener diode but a 1N4148 diode (so the picture of the zener diode symbol on the PCB board is swapped between D2 and D3)
To find out which zener diode is, we can see the number or value written on the zener diode body.
For example, on the body of the zener diode, the numbers 4V7 (4.7 Volts), 5V1 (5.1 Volts), 5V6 (5.6 Volts), etc. are written.
There are also those who use the letter code "B" instead of the letter "V" code (eg: 4B7 (4.7 Volts), 5B1 (5.1 Volts), 5B6 (5.6 Volts).
And also there are those who use the letter code "C" (eg: 4C7 (4.7 Volts), 5C1 (5.1 Volts), 5C6 (5.6 Volts).
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And for the feedback system from a charger module it is not all the same, there are also those who use a feedback system that uses IC PC817.
For those who use a feedback system using the PC817 IC, the zener diode must be in the secondary and one of its legs is connected to the PC817 IC.
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Please watch the video carefully. If you have any questions, please, friends, you can comment in the comments column of this video.
Thank you.. Congratulations & enthusiasm for learning
20 дек 2020
