User manual

29 Chapter 4
4.1.1 Jumpers and switches
The motherboard of the Vehicle Mounted Computer has a number of
jumpers that help configure the system. It also has LED indicator lamps
that display the system operation status. The table below lists the function
of each jumper and LED.
4.1.2 Locating jumpers and switches
Figure 4.1: Locating jumpers on the TREK-775/TREK-776
Table 4.1: Jumpers and their functions
Label Function
JP1 LCD power connector
JP2 CMOS clear for external RTC
JP3 COM1/COM2/COM3/COM4 Pin 9 Ring & power
output type setting
JP4 COM1/COM2/COM3/COM4 Pin 9 power output
value setting
JP5 Panel type setting
LED 1 Power indicator
LED 2 HDD operation indicator
LED 3 Wireless Radio operation indicator
JP1
LED3
LED2
LED1
JP3
JP4
JP2
JP5