Furuno FS-1570 - Page 217

7.3 PA Bias
7-15
(3) 05P0738 board (DRV, FS-2570T)
Fig.7.3.4 250 W DRV, 05P0738
A
+
-
DRV BIAS ADJ.
(R25, 100 mA)
RF IN (J2)
Remove the connecter
for BIAS adjustment.
L4
Wire is as short and
heavy as possible.