Com2, Com3, Ri/+5V/+12V Select (Jcompwr2 Jcompwr3 ); Lvds Back Light Power Selection (Jlvds_Bkl1) - Avalue Technology EMX-QM77 User Manual

2.8.2

COM2, COM3, RI/+5V/+12V Select (JCOMPWR2 JCOMPWR3 )

This jumper allows you to select the power mode of COM PORTATX Mode or AT mode
2.8.3

LVDS Back Light power selection (JLVDS_BKL1)

RI (Default) +5V
+5V (Default)
Function:
Voltage Level shift select for Bright control@LVDS
EMX-QM77 User's Manual 37
EMX-QM77 User's Manual
+12V
+3.3V