S1202-2 Schematic !free!

PWM controller’s VCC pin → Start-up resistor (R1) from high-voltage DC → Auxiliary winding on the main transformer. Diagnosis: The start-up resistor can go high in value, or the auxiliary winding’s rectifier diode (D5) can become leaky. The schematic will show that the controller initially gets power via R1, then after startup, it is powered by D5/C5. If D5 fails, the IC undervoltage lockout trips.

The S1202-2 schematic outlines a mobile platform based on the Intel Ivy Bridge Sandy Bridge architectures. Processor Support s1202-2 schematic

Have you restored an S1-202 or worked on an S1202-2 module? Share your experiences and mods in the comments below. PWM controller’s VCC pin → Start-up resistor (R1)