The compensation network (R and C around the TL431). A quality wannien 101v0 power supply schematic repack will show exact values like C22 = 47nF, R27 = 1kΩ.
The feedback is critical. A TL431 compares a divided-down sample of the output voltage to its internal 2.5V reference. The error signal drives the PC817 optocoupler, which modulates the PWM controller on the primary side. wannien 101v0 power supply schematic repack
: It accurately identifies critical high-failure points like the primary filter capacitors , switching transistors, and the EI-28 or EI-35 transformers . 2. Repair Success Rates The compensation network (R and C around the TL431)
Working with switch-mode power supplies involves lethal voltages (up to 400V DC on the primary side). Capacitors can retain charge for days. Always discharge bulk capacitors through a 10kΩ/5W resistor before probing. A TL431 compares a divided-down sample of the
Руководство по ремонту блока питания Antminer APW12 [EN]