8. MAINTENANCE, TROUBLESHOOTING
8-7
8.7
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 the fuses.
• Check power source.
• Check if the breaker in the power supply unit has tripped.
Abnormal noise from hull unit
Check if the drive shaft in the hull unit is sufficiently greased. See
section 8.2.
Bottom echo is unsteady.
• Rough seas. Distance to the bottom changes due to rolling and
pitching.
• Long range selected. Transmission period is longer so ship’s
pitching and rolling are apt to affect detection of echo.
Weak echoes
• Output power set to minimum. Set [TX Power] to maximum, on
the [TX/RX Setting] menu.
• Adjust the
GAIN
control.
• Excessive TVG. Readjust [Near Gain], [Far Gain]. See
Note:
Readjustment of TVG is necessary after the gain is adjust-
ed.
Color is abnormal.
Brilliance setting too low. Increase brightness of the monitor.
Cannot operate the equipment
Application error. Long push the power switch on the control unit
approx. 10 seconds to turn off the power. Turn on the power and
check function.
Picture contains noise.
• Equipment not grounded properly. Check equipment ground.
• Power cable is too close to the signal cable. Relocate power
cable or signal cable.
• Debris may be on the sea surface. Reject unwanted noise with
[Int Reject] in the [Picture Setting] menu or [Signal Level] in the
[Display Setting] menu.
Cannot turn off the power
Long push the power switch on the control unit approx. 10 sec-
onds to turn off the power.
The fish alarm does not sound.
The alarm does not sound when the setting of [Echo Disp Area]
(in the [Display Setting] menu) is changed. Re-set the alarm
range to get the audio for the fish alarm.
The offcenter feature does not
work.
• When the true motion is used in the H2 mode, the range of the
H1 and H2 displays is different.
• Set the tilt angle to 0° when using the true motion.
Summary of Contents for FSV25S
Page 1: ...COLOR SCANNING SONAR FSV 25 FSV 25S OPERATOR S MANUAL www furuno com Model ...
Page 14: ...SYSTEM CONFIGURATION xii This page is intentionally left blank ...
Page 32: ...1 OPERATIONAL OVERVIEW 1 18 This page is intentionally left blank ...
Page 92: ...4 NUMERIC GRAPHIC DATA DISPLAY 4 4 This page is intentionally left blank ...
Page 126: ...7 RECORD RECALL OPERATION 7 10 This page is intentionally left blank ...
Page 156: ...APPENDIX 1 MENU TREE AP 6 This page is intentionally left blank ...
Page 160: ...FURUNO FSV 25 25S SP 4 E1344S01C 140402 This page is intentionally left blank ...
Page 163: ......