Furuno FAR-2107 Series Service Manual page 303

4.5 Jumper Setting of Terminal Board
Fig. 4.5.1 Location of Jumpers on Terminal Board
The interface circuit of both ports is as shown below.
RD
TD
GND
Logic common
Fig. 4.5.2 Interface circuit of AIS and HDG Ports
[J655]: AIS port jumper
2 3 11
ST1 ST2
GND2
420kHz
Vcc
1
RO
28
R
RE
27
LTC1535
DE
26
D
DI
25
GND
4
4.5 Jumper Setting of Terminal Board
[J656]: HDG port jumper
TERMINAL p.c.b
GND2
Floating
common
14
AIS port: [J655]
Vcc2
HDG port: [J656]
A
16
3
1 2
B
15
(100Ω)
RO2
17
Y
13
Z
12
SLO
18
4-39
Set position
RDx-B
330 x 3
RDx-A
TDx-B
TDx-A
COMMON