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Well, this is end of my road. I applied the external power (12V) to controller board, in parallel to existing 240V->12V supply regulator.
LED marked with black arrow is supposed to be ON.
HT66F018 (A/D Flash MCU with EEPROM) is PWM generator, and it is dead, there is no output activity from it.
I need another controller board....
The good thing about all this is, there are DC motor controllers on the market (I can even make my own with Arduino), for couple of $$ and better/safer than original one.
Last edited by bojan; 19-04-2020 at 09:08 AM.
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