Troubleshooting - Furuno CSH-5L Operator's Manual

8.6

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
Picture does not
change when tilt
angle is changed
Check power cable.
Check ship's mains.
First check the fuse in the processor unit. If it is OK, have a
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 TX OUTPUT (SONAR menu) to
maximum.
Excessive TVG. Readjust TVG NEAR and FAR on the SONAR
menu.
Brilliance too low. Adjust display brilliance.
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 SONAR menu.
Problem in tilt mechanism or control line. Contact a FURUNO agent
or dealer for advice.
8. MAINTENANCE, TROUBLESHOOTING
Check, Remedy
8-5