Acer Aspire X1920 Acer Aspire X1920 Desktop Service Guide - Page 82

F_USB1~3: Front Panel USB headers The motherboard has two USB ports installed on the rear edge I/O port array.Additionally, some computer cases have USB ports at the front of the case. If youhave this kind of case, use auxiliary USB connector to connect the front-mountedports to the motherboard. Pin Signal Name 1 USBPWR 2 USBPWR 3 USB_FP_P0- 4 USB_FP_P1- 5 USB_FP_P0+ 6 USB_FP_P1+ 7 GND 8 GND 9 Key 10 USB_FP_OC0 Function Front Panel USB Power Front Panel USB Power USB Port 0 Negative Signal USB Port 1 Negative Signal USB Port 0 Positive Signal USB Port 1 Positive Signal Ground Ground No pin Overcurrent signal SPDIF_OUT1: SPDIF out header This is an optional header that provides an S/PDIF (Sony/Philips Digital Interface)output to digital multimedia device through optical fiber or coaxial connector. Pin Signal Name 1 SPDIF 2 +5VA 3 Key 4 GND Function SPDIF digital output 5V analog Power No pin Ground 74 Aspire AX1920 Service Guide