Furuno FR-8122 Installation Manual page 27

Jumper block, slide switch setting
The jumper block JP1 and slide switch S112 on the PWR board (03P9419) must be set
according to radar model. Open the unit, locate JP1 and S112 and set them as below.
Jumper block, slide switch Function
JP1
S112
Power requirement, replacement of fuses
Power requirement
The power for the power supply unit and display unit must be drawn from the same power
switch on the power terminal board.
Replacement of fuses
The power supply unit is shipped with 15 A fuse(for connection to 12 VDC battery). Replace
fuse with 7 A (supplied) when the ship's battery is 24 VDC.
Slide switch S112
(Upward position
for FR-8252 radar)
FR-8252
S112
MODEL1964C
Power supply unit, inside view
Enables/disables motor slow start circuit.
TUNE voltage selector (0-12 V, 0-32 V)
Jumper block JP1
("short" for FR-8252 radar;
remove dummy connector and
put connector assy. XH12P-L40-ACR.)
Setting
Short (disable)
Upward position
(0-12 V)
2. Wiring
2-3