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7. MAINTENANCE, TROUBLESHOOTING
7-8
DCE Memory: Memory remaining in communication unit
BBER: Bulletin Board Error Rate (%)
C/N: Check of circuit status with LES, receiving circuit in
antenna unit and RF CON/CPU Board in
communication unit. OK appears for figure greater
than 31.
Send Level: TX level check. At transmission, OK appears for
figure greater than 123. At reception, OK appears for
figure lower than 32.
RX AGC Level: Check of the receiving circuit of the antenna unit and
the RF CON/CPU Board in the communication unit.
OK appears for figure greater than 60.
REF Offset Freq: OK appears for figure lower than 150.
Synthe Local: Check of RF CON/CPU Board.
VCXO Control: Oscillator frequency control value.
Antenna Power Supply: NG appears for discontinuity or short in antenna
cable. OK is shown if the antenna is receiving
electrical power.
Temperature*: Blank
Water Current*
Direction: Blank
Speed: Blank
Depth*: Blank
* = Requires data from appropriate sensor.
7.5 Replacing the Fuse
The fuse (12 VDC: 10A, 24 VDC: 5A) in the power cable protects the
communications unit from overcurrent and reverse polarity. If the fuse blows, find
out the case before replacing it. If it blows again after replacement, contact your
dealer for advice. Be sure to use the correct fuse. Use of a wrong will damage
the equipment and void the warranty.
CAUTION
Use the proper fuse.
Use of a wrong fuse can result in damage
to the equipment.
Fuse
12 VDC
Type: FGBO 125V 10A PBF
Code No.: 000-155-826-10
24 VDC
Type: FGBO-A 125V 5A PBF
Code No.: 000-155-853-10