10. MAINTENANCE
10-4
10.6
Troubleshooting
The table below provides common symptoms of equipment troubles and the means to
rectify them. If the problem cannot be solved with the information supplied in this man-
ual, consult your local dealer for service.
Troubleshooting
Symptom
Check, remedy
Cannot turn on power
• Check cables between transceiver unit, processor
unit and monitor unit.
• Check ship’s mains.
• Have a qualified technician check the fuses inside
the transceiver unit.
Cannot turn off power
• Check cables between transceiver unit and pro-
cessor unit.
• Press and hold the power key for approximately
seven seconds to force-shut-down the equipment.
Cannot operate the equipment
• Check connections between control unit and pro-
cessor unit.
Strange noise from hull unit
• Gears may require re-greasing. See
Bottom echo becomes irregular
• Rough seas. Distance to the bottom changes due
to rolling and pitching.
• Long range selected. Transmission period is lon-
ger so ship’s pitching and rolling are apt to affect
detection of echo.
Weak echoes
• Output power set to minimum. Set power to maxi-
mum from main menu
→
[1 TX/RX Setting]
→
[3
Transmission Power].
• Adjust the gain with the
GAIN
knob. See
• If either near echoes or far echoes only are weak,
adjust the [Near Gain] or [Far Gain] as appropri-
ate. See section 2.7.2.
Somewhat strange color
• Brilliance setting too low. Increase the monitor
brightness.
Picture contains noise
• Equipment not grounded properly. Check equip-
ment ground.
• Power cable is too close to the signal cable. Relo-
cate power cable or signal cable.
• Debris may be on sea surface. Reject unwanted
noise with the interference rejector on the [4 Pic-
ture Setting] menu or gain offset on the [3 Display
Setting] menu.
Alarm releases no audio
• If settings at main menu
→
[9 Installation Setting]
→
[OK]
→
[1 Display Setting]
→
[2 Echo Display
Area] are changed, on rare occasions the alarm is
also silenced. Re-set the alarm parameters in this
case.
Summary of Contents for FSV-75
Page 1: ...OPERATOR S MANUAL www furuno com HALF CIRCLE COLOR SCANNING SONAR Model FSV 75 FSV 75 3D ...
Page 78: ...2 SLANT MODE 2 44 This page is intentionally left blank ...
Page 110: ...4 FISH FINDER MODE 4 12 This page is intentionally left blank ...
Page 144: ...5 3D MODE 5 34 This page is intentionally left blank ...
Page 148: ...6 NUMERIC GRAPHIC DATA DISPLAY 6 4 This page is intentionally left blank ...
Page 158: ...7 HOW TO CUSTOMIZE THE SONAR 7 10 This page is intentionally left blank ...
Page 216: ...10 MAINTENANCE 10 28 This page is intentionally left blank ...
Page 234: ...INDEX IN 3 W Warning messages 10 5 X XSECT ON OFF button 5 6 Z Zoom in out 5 4 ...
Page 235: ......