User manual

TREK-743 User Manual 20

4.1 Setting Jumpers and Switches

It is possible to configure the Vehicle Mounted Computer to match the needs of the

application by resetting the jumpers. A jumper is the simplest kind of electrical switch.

It consists of two metal pins and a small metal clip, often protected by a plastic cover

that slides over the pins to connect them. To “close” a jumper, connect the pins with

the clip. To “open” a jumper, remove the clip. Sometimes a jumper has three pins,

labeled 1, 2, and 3. In this case, connect either pins 1 and 2, or pins 2 and 3.

A pair of needle-nose pliers may be helpful when working with jumpers. If there are

any doubts about the best hardware configuration for the application, contact the

local distributor or sales representative before making any changes.

An arrow is used on the motherboard to indicate the first pin of each jumper.

4.1.1 Locating Jumpers and Switches

The motherboard of the Vehicle Mounted Computer has a number of jumpers that

are used to set various configuration options best suited to the function of applica-

tions installed on the computer. LEDs that indicate the system operation status are

also located on the motherboard. The table below lists the function of each jumper

and LED.

open closed closed 2-3

Table 4.1: Jumpers & LEDS on the Motherboard

Label Function

JP1 CMOS clear for external RTC

JP2 COM1/COM2 Pin 9 power output value setting

CN27 COM1/COM2 Pin 9 Ring & power output type setting

JP3 Power feature setting

LED1 Wireless Radio operation indicator

LED2 CAN BUS operation indicator (Tx signal)

LED3 CAN BUS operation indicator (Rx signal)

LED5 GPRS operation indicator

LED6 Power indicator

LED7 CF operation indicator