Furuno IB-681 User Manual
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9. Detach all connectors from the rear panel; dismount the power supply unit and the rear
panel.
10.For the unit manufactured before 7/98, detach the dummy plate from the rear panel
and fasten the connector assy. (supplied) to the rear panel with the screws used to fix
the dummy plate. For the unit manufactured after 7/98 use the screws supplied to
attach the connector assy. to the rear panel.
DGPS OUT
TX IF
RX IF
REF
HSD CTRL
Detach dummy
plate and fasten
connector fixing
plate with screws
used to fasten
dummy plate.
Rear panel of communication unit
Connector assy.
Dummy plate
Figure 20 Mounting of connector assy.
11.For version -2 or higher of the REAR PANEL Board.
Connect the HSD CTRL connector from the connector assy. to J15 on the REAR
PANEL Board.
INMARSAT-B
MOBILE EARTH STATION
COMPASS
BEARING
ELEVATION
S LEVEL
TEL 1
TEL 2
TEL 3
TEL 4
TEL 5
TEL 6
TELEX
DATA
AOR-WEST
AOR- EAST
POR
POWER
DIMMER
LOCK
I OR
READY
TX
FAIL
FELCOM 81
DIMMER
LOCK
DIMMER
LOCK
INMARSAT-B
MOBILE EARTH STATION
COMPASS
BEARING
ELEVATION
S LEVEL
TEL 1
TEL 2
TEL 3
TEL 4
TEL 5
TEL 6
TELEX
DATA
AOR-WEST
AOR- EAST
POR
POWER
DIMMER
LOCK
I OR
READY
TX
FAIL
REAR PANEL
Board
J15
REAR PANEL Board,
front view
Connector
RF CONV
assy.
Board
HSD CTRL J15
1
NC
2
RD
1
RD
3
TD
2
TD
4
NC
3
GND
5
GND
6
-
9
NC
HSD CTRL
Figure 21 Communication unit, rear view, rear panel removed