Cpu Type Select (Jp5) - Aaeon SBC-551 Manual

You can connect an external jumper cap or switch to clear CMOS.
Clear CMOS procedure:
1. Disconnect all power source.
2. Move JP4 from 1-2 to 2-3 for few seconds.
3. Move JP4 back to 1-2.
Normal* Clear CMOS
1 2 3
1 2 3
*default
JP5 must be set to match the CPU type between Dual-Voltage ( e.g.,
P55C ) and Single-Voltage ( e.g., P54C ) type CPU. The chart below
shows the proper jumper setting for their respective CPU type.

CPU type select (JP5)

Dual-Voltage* Single-Voltage
JP5
1 2 3
1 2 3
* default
WARNING: Improper setting could damage the CPU.
Chapter 2 Installation 17