Furuno IC-350 Operator's Manual page 15

Short plug position and SSB radiotelephone
FS-1570/2570/5070: Change the position of the short plug of pin headers J101, J203, J204, J205,
J301, J302 as shown in the figure below.FS-1575/2575/5075: No adjustment is necessary; use
the default positions. (All short plugs are between #2 & 3.)
J205
3
3
2
2
1
1
For FS-1570/2570/5070, set the short plugs of J205, J204, J203,
J301, J302 and J101 between pins 2 & 3.
J102 is for program update only to set between pins 2 & 3.
J204 J203
J301
3
2
J302
1
1
2
3
7
1. INSTALLATION
MAIN board
05P0819
J101
Short plug