Com3 And Com4 Voltage Jumper; Figure 33: Com3 And Com4 Voltage Jumper Diagram; Table 29: Com3 And Com4 Voltage Jumper Settings - VIA Technologies VB7009 User Manual

3.2.2. COM3 and COM4 Voltage Jumper

The voltage for COM3 and COM4 is controlled by the jumper labeled as "J13". The voltage can be either
+5V or +12V. +5V is the default setting. The even pin numbers correspond to COM3. The odd pin
numbers correspond to COM4. The jumper settings are shown below.

Figure 33: COM3 and COM4 voltage jumper diagram

Table 29: COM3 and COM4 voltage jumper settings

COM4 Settings Pin 1
+5V (default) Short
+12V Open
COM3 Settings Pin 2
+5V (default) Short
+12V Open
VIA VB7009 User Manual
Pin 3 Pin 5
Short Open
Short Short
Pin 4 Pin 6
Short Open
Short Short
33