Onkyo DR-645(S)/(B) Service Manual page 17

USB and Headphone Board -- Circuit and Layout Diagram
USB Board
5V
4
DP
3
DN
2
GND_USB
1
4P/2.0
CN5
JACK901
5
Shield
4
GND
3
D+
2
D-
1
vbus
USB
7-6
Headphone Board
JACK202
AUX-R
1
2
AUX-L
3
J104A
AGND-1
4
HP-MUTE1
3
HP-L1
2
HP-R1
1
CN3
4P/2.0
7-6
CN4
3P/2.0