User`s manual
ENDAT-2794A USERS MANUAL 
UNICORN COMPUTER CORP. 
11 
Jumpers Overview: 
LCD Voltage Select  JP6 
LCD Backlight Voltage Select  JP9(Pin3-5) 
LCD Backlight Control Voltage Select JP9(Pin6-8) 
LVDS1 
LCD Backlight Voltage (for +3.3V)  JP9(Pin9-10) 
LCD Voltage Select  JP7 
LCD Backlight Voltage Select  JP14 
LCD Backlight Control Voltage Select JP12 
LVDS2 
LCD Backlight Voltage (for +3.3V)  JP9(Pin1-2) 
Clear CMOS  JBAT1 
COM1/2/3/4 Voltage Selector  JP5, JP4 
RS232 / 485 Selector for COM2  JP2, JP3 
Header for Case Panel  JP8 
HDD LED  JP8: Pin 1(-), Pin 2(+) 
External Speaker  JP8: Pin 3(-), Pin 6(+) 
Buzzer On/Off  JP8: Pin 4, Pin 5 
Hardware Reset Switch  JP8: Pin 7, Pin 8 
ATX Power Supply On/Off Switch  JP8: Pin 9, Pin 10 
Power LED  JP8: Pin 11(-), Pin 12(+)
WDT Function Enable/Disable  JP8: Pin 13, Pin 14 
Please double-check the insertion and orientation of the LCD cable before applying power. 
Improper installation will result in permanent damage LCD panel.
Part 1: Onboard Jumpers 
JBAT1: CMOS Data Clear (1x3 with 2.0mm) 
Pin 2-3 *  Normal 
Pin 1-2  Close for clear CMOS
JP2, JP3: RS232 / 422 / 485 Selectors for COM2 (2.0mm) 
TYPE  JP2 (3x4 with 2mm) JP3 (2x3 with 2mm) 
 RS-232 *  1-2, 4-5, 7-8, 10-11  1-2 
RS-422  2-3, 5-6, 8-9, 11-12  3-4 
RS-485  2-3, 5-6, 8-9, 11-12  5-6 










