COMMELL LE-37D - Manual (Page 10)

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Chapter 2 <Hardware Setup>
2.1 <Connector Location>
2.2 <Jumper Location & Reference>
Jumper Function
JRTC CMOS Operating/Clear Setting
JVLCD Panel Voltage Setting
JAT Power mode select
JP1 Com1 Voltage Setting (For Pin 9)
JP2 Com2 Voltage Setting (For Pin 9)
JCSEL1
JCSEL2 CN_COM2 RS-232 RS422 RS485 Setting
CN_IR Setting
JVUSB1 USB Voltage Setting
JMSATA Mini Card1 mSATA Setting (Mini PCIe)