Usually connects at positions P1, P2, and P3 to control speed. Heat Dissipation:
For detailed component-level repair, you can view technical discussions and high-resolution board layouts on community forums like Chipmaker . JYMC Variable Speed DC Motor Controls | PDF - Scribd jymc220bi schematic 2021
: Works with Permanent Magnet (PM) and shunt-wound DC motors. Protections Usually connects at positions P1, P2, and P3