High-value resistors (usually 100kΩ to 470kΩ) connected to the primary HV line supply initial power to VCC on the PWM IC. If these go open-circuit, the IC will never turn on. The "Clicking" or Power Cycling Symptom
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Connected to an external resistor to program the switching frequency of the internal oscillator. Analyzing a High-Quality ZD95GF Reference Circuit High-value resistors (usually 100kΩ to 470kΩ) connected to
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According to specifications found on AliExpress and DHGate , the board features: : A heat resistance rating of , making it stable in high-temperature environments.
The schematic is organized into five functional blocks: