Acer Aspire M3400 Service Manual page 68

USB CONNECTORS (Stacked)(Black)
USB_X4
"11,21,31,41"
12
13
14
22
23
24
32
33
34
42
43
44
"45,46,47,48,
49,50"
61
Pin Signal Name
VCC_USB1
USBP3N_R
USBP3P_R
Ground
USBP2N_R
USBP2P_R
Ground
USBP5N_R
USBP5P_R
Ground
USBP4N_R
USBP4P_R
Ground
Ground
Chapter 5