9. MAINTENANCE, TROUBLESHOOTING
9-5
9.7
Troubleshooting
The table below provides common symptoms of equipment troubles and the means to
rectify them.
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.
Bottom echo becomes irregular. • Rough seas. Distance to the bottom changes due
to rolling and pitching.
• Long range selected. Transmission period is long-
er so ship’s pitching and rolling are apt to affect de-
tection of echo.
Weak echoes
• Output power set to minimum. Set [TX Power] to
maximum, on the [TX/RX Setting] menu.
• Excessive TVG. Readjust TVG on the [Gain Set-
ting] menu.
Note:
Readjustment of TVG is necessary after the
gain is adjusted.
Somewhat strange color
Brilliance setting too low. Increase brightness of the
monitor.
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 [Picture
Setting] menu or gain offset on the [Display Set-
ting] menu.
Summary of Contents for FSV-85
Page 1: ...COLOR SCANNING SONAR FSV 85 OPERATOR S MANUAL www furuno com Model ...
Page 128: ...5 NUMERIC GRAPHIC DATA DISPLAY 5 4 This page is intentionally left blank ...
Page 158: ...8 RECORD RECALL OPERATION 8 8 This page is intentionally left blank ...
Page 172: ...9 MAINTENANCE TROUBLESHOOTING 9 14 This page is intentionally left blank ...
Page 178: ...APPENDIX 1 MENU TREE AP 6 This page is intentionally left blank ...
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