EPIA-M860 User Manual
31
3.4.2.
COM3 and COM4 Voltage Select Jumper
The voltage for COM3 and COM4 is controlled by the jumper labeled as “J7”. Refer to Figure 31 for the location of the
jumper.
The voltage can be 5V or +12V. +5V is the default setting. The odd pin numbers correspond to COM3. The
even pin numbers correspond to COM4. The jumper settings are shown below.
COM3 Setting
Pin 1
Pin 3
Pin 5
+5V (default)
On
On
Off
+12V
Off
On
On
COM4 Setting
Pin 2
Pin 4
Pin 6
+5V (default)
On
On
Off
+12V
Off
On
On
Table 26: Jumper settings for COM3 and COM4
3.4.3.
COM5 and COM6 Voltage Select Jumper
The voltage for COM5 and COM6 is controlled by the jumper labeled as “J8”. Refer to Figure 31 for the location of the
jumper.
The voltage can be 5V or +12V. +5V is the default setting. The odd pin numbers correspond to COM5. The
even pin numbers correspond to COM6. The jumper settings are shown below.
COM5 Setting
Pin 1
Pin 3
Pin 5
+5V (default)
On
On
Off
+12V
Off
On
On
COM6 Setting
Pin 2
Pin 4
Pin 6
+5V (default)
On
On
Off
+12V
Off
On
On
Table 27: Jumper settings for COM5 and COM6
Note:
If the mainboard is not equipped with COM5 and COM6, then the J8 jumper will not be on the mainboard either.
