So it was a track broken naturally, or by some former incident? Plus a solder bridge. Was it a reworked board?
You see what HV can do now even with small overlooks. Strikes components like lightning, and people if not careful. Happy end though.
Salas for sure I learned the lesson about HV, I'm looking the ceramic fuses 100mA 500V to order.
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I have said it before, but it looks like it is worth repeating.
The CCS part of the regulator can be assembled and tested at low voltage. Prove it alone is working. This will need one extra resistor to increase the grounding current at the selected Low Voltage for testing.
The the extra resistor can be removed and the CCS tested at full voltage using an appropriate load (power) resistor.
Then add on the assembly of the voltage regulator. Test the whole regulator.
The CCS part of the regulator can be assembled and tested at low voltage. Prove it alone is working. This will need one extra resistor to increase the grounding current at the selected Low Voltage for testing.
The the extra resistor can be removed and the CCS tested at full voltage using an appropriate load (power) resistor.
Then add on the assembly of the voltage regulator. Test the whole regulator.
I have said it before, but it looks like it is worth repeating.
The CCS part of the regulator can be assembled and tested at low voltage. Prove it alone is working. This will need one extra resistor to increase the grounding current at the selected Low Voltage for testing.
The the extra resistor can be removed and the CCS tested at full voltage using an appropriate load (power) resistor.
Then add on the assembly of the voltage regulator. Test the whole regulator.
Yes, thanks AndrewT, I forgot, I know that by own experience😡.
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