For Xbox 360 Power Supply | Schematics

power supply unit (PSU). While Microsoft does not release official internal board-level schematics, reverse-engineered data from enthusiasts and the Xbox Support community provides a comprehensive look at how these units function.

is a switching power supply that utilizes a frequency-modulated LLC resonant design in some versions, such as the 175W model. Schematics For Xbox 360 Power Supply

A signal line. When the console is turned on, it pulls this line high (usually to 5V) to tell the PSU to activate the main 12V rail. power supply unit (PSU)