Finding a schematic for a specific laptop like the Toshiba Satellite U505
: These circuits illustrate how raw DC voltage from the adapter is stepped down to the 3.3V and 5V standby rails required to start the laptop. Schematic Toshiba Satellite U505
If you are troubleshooting this model, keep these frequent issues in mind: How to download laptop schematics diagrams part 2 Finding a schematic for a specific laptop like