Furuno FAR-2107 Series Service Manual page 377

Loopback test
The I/O ports are checked by the loopback test.
Procedure
1. Jumper the ports to be loopback on the TB board of RPU-013 as shown below.
** AIS port test **
J611 AIS
AIS TD-A
AIS TD-B
AIS RD-A
AIS RD-B
AIS COMMON
** TRACK port test **
J620 TRACK CONTROL
TRK TD-A
TRK TD-B
TRK RD-A
TRK RD-B
** RS-232C port test **
J601 RS-232C
RS-232C RX
RS-232C TX
2. Press [2], [3] and [4] keys while holding down the [1:HL OFF] key.
3. The [Factory] menu is displayed. Select "4: Factory test".
** NAV port test **
J606 NAVIGATOR
1
2
3
4
5
** HDG port test **
J621 SERIAL I/F
1
2
3
4
GND 5
** LOG port test **
J621 SERIAL I/F
N.C 1
2
3
N.C 4
GND 5
6
N.C
7
N.C
8
N.C
9
N.C
Terminal board
Fig. 6.2.4 Jumpers for Loopback Test
NAV H 1
NAV C 2
N.C
3
RSV1 TD A 1
RSV1 TD B 2
GND 3
4
RSV2 TD A
RSV2 TD B 5
6
GND
RSV1 TD A 1
RSV1 TD B 2
GND 3
RSV2 TD A 4
5
RSV2 TD B
GND 6
6-21
6.2 FACTORY TEST
J619 ECDIS
1 ARPA TD A
ARPA TD B
2
GND
3
J605 HDG SENSOR
1 HDG A
2 HDG B
GND
3
J607 LOG
1 LOG A
LOG B
2
3 N.C