Troubleshooting - Furuno FSV-30 Operator's Manual

10. MAINTENANCE, TROUBLESHOOTING
10.6

Troubleshooting

The table below provides common symptoms of equipment troubles and the
means to rectify them.
Symptom
Cannot turn on the
power.
Bottom echo
becomes irregular.
Weak echo
Somewhat strange
color
Picture contains
noise.
10-4
Troubleshooting
Check, Remedy
Check cable between transceiver unit, processor unit and
monitor unit.
Check ship's mains.
Have a suitably qualified technician check the fuse in the
transceiver unit.
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.
Output power set to minimum. Set to maximum, on the
H-SCAN SETTING menu.
Excessive TVG. Readjust TVG on the appropriate menu
(H-SCAN SETTING, V-SCAN SETTING). Note that
readjustment of TVG is necessary when gain is adjusted.
Brilliance setting too low. Increase brightness with the
[BRILLIANCE] control.
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 sea surface. Reject unwanted noise with the
interference rejector on the appropriate menu among H-SCAN
SETTING, V-SCAN SETTING.