Because Sony does not officially release these diagrams, most available schematics are community-reverse-engineered or leaked technical documents:
Always consult the ADP-160ER datasheet for: Adp-160er Schematic
Without this feedback loop, the adapter would output 30V+ and destroy the laptop. Because Sony does not officially release these diagrams,
I plugged the console back into the wall. My finger pressed the power button. Beep. The blue light pulsed to life. A diagram on a screen had just brought my console back from the dead. Adp-160er Schematic
The TL431 compares a fraction of the output voltage to an internal 2.5V reference. If the voltage rises above 20V, the TL431 conducts more current. This current flows through an , causing its internal LED to glow brighter.