-8 USB BOARDNumber Position definition1 CON3 USB signal input be connected with the HUB board’sCON6 or CON7 or CON8 or CON92 CON2 Print signal output be connected with the Side AVboard CON213 J2 USB video output be connected with the main boardCN34 J4 USB audio output be connected with the Emulationboard CNA15 CN1 5V power input be connected with the Emulation boardCNA56 J5 Not used7 J1 Not used6127543