Sony PCV-E204 - Manual (Page 64)

VAIO MicroTower System Reference 56
USB Connectors
There are two standard USB ports that permit connection of two USB
peripheral devices directly to the system without having to use an
external hub. If more USB devices are needed, connect an external hub to
either USB1 or USB2.
Pin Signal Name
1 PWR
2 SIGNAL
3 SIGNAL
4 GND
KY0033.VSD
USB2
USB1