Partner SP-850-S Service Manual page 16

Jumper
JP3
(COM3 Power Select Jumper)
JP4
(COM4 Power Select Jumper)
JT1
(Touch Panel USB or PS/2 Interface
Select Jumper)
Setting
1-2 Close
3-4 Close (Default)
5-6 Close
1-2 Close
3-4 Close (Default)
5-6 Close
1-2 Close
2-3 Close (Default)
16
Description
COM3 Pin 9: 5V
COM3 Pin 9: RING
COM3 Pin 9: 12V
COM4 Pin 9: 5V
COM4 Pin 9: RING
COM4 Pin 9: 12V
PS/2 Interface
USB Interface