IMB520 / 521 LGA1151 ATX Motherboard
8
Board and Pin Assignments
2.4
Jumper Settings
Pin description
A jumper is a small component consisting of a jumper clip and jumper pins. Install a jumper clip
on two jumper pins to close the jumper pins. Remove the jumper clip from two jumper pins to
open the jumper pins. The following illustration shows how to set up a jumper.
Before applying power to the IMB520 / 521 series, make sure all of the jumpers are in factory
default position. Below you can find a summary table of all jumpers and onboard default
settings.
Note
Turn off power before changing any default jumper settings.
Jumper
Description
Setting
JP8
Clear CMOS
Default: Normal Operation
1-2 Close
JP9
AT/ATX Power Mode Select
Default: ATX Mode
2-3 Close
JP3, JP6
COM1/2 RS-232/422/485 Mode Select
Default: RS-232
1-2 Close
JP1, JP2
3-5, 4-6 Close
JP4, JP5
3-5, 4-6 Close
JP7
System Temperature Sensor Source Select
Default: Internal Sensor
External Sensor can be installed on 2-3
1-2 Close
Note
To identify the first pin of a header or jumper, please refer to the following
information:
Usually, there is a thick line or a triangle near the header or jumper pin 1.
A square pad, which you can find on the back of the motherboard, is usually
used for pin 1.
