6-10
6.3 Error Messages
No. Message Meaning Action
1
Warning : Internal GPS UNIT
failure
GPS signal could not be
detected.
Replace GPS receiver Board
(GN-74) or check cable between
CPU, J8 and GN74, J2.
2
Warning : External NAV
equipment failure
No input of NMEA 0183 data
from navigation device.
Check navigation device
connected.
3
No response from
communication unit
No response. Turn on or check the unit.
4
TROUBLE : ANT power
voltage abnormality
Supply voltage for antenna unit
is out of rating.
Check if antenna cable is
shorted (Check antenna
connector).
If OK, replace SW REG Board.
5 TROUBLE: EE PROM ERROR EE PROM is damaged.
Replace EE PROM with a new
one having vessel's ID.
6
TROUBLE: Invalid MES ID.
This equipment is deffected,
Please contact FURUNO.
No ID number in EE PROM.
Not registered with Inmarsat.
Replace EE PROM with a new
one having vessel's ID.
7
TROUBLE: Invalid MES ID .
This equipment is deffected,
Please contact FURUNO. →
TROUBLE: EE PROM ERROR
EE PROM not installed.
Put EE PROM having vessel's
ID.
8
TROUBLE: Synthesizer
UNLOCK
Synthesizer circuit is faulty.
Find out which circuit is
defective on "System Status
Monitor" display.
9 TROUBLE: Remote cable short
Remote lines (BZ OUT-H and -
C) for IC-303 are shorted.
Check remote lines.
(Check connector.)
10
TROUBLE: DMC 1(2) cable
short
Remote lines (DMC IN-H and -
C) for DMC or IC-302 are
shorted.
Check remote lines.
(Check connector.)
11 TROUBLE: Carrier power level
TX current could not be
detected by SW REG Board at
transmission, that is, no
transmission.
Check system status monitor for
send level in ST-BY.
If 255, check cable between SW
REG Board J4 and CPU Board
J9.
If 0, check TX, ANT, RF CON
Boards.
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