Furuno CSH-5L/CSH-8L manual Troubleshooting, Symptom, Check, Remedy

8. MAINTENANCE, TROUBLESHOOTING

8.6Troubleshooting

The table below provides common symptoms of equipment troubles and the means to rectify them.

Symptom		Check, Remedy
Cannot turn on the	•	Check power cable.
power	•	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.
Bottom echo	• Rough seas. Distance to the bottom changes due to rolling and
becomes irregular		pitching.
	• Long range selected. Transmission period is longer so ship’s
		pitching and rolling are apt to affect detection of echo.
Weak echo	• Output power set to minimum. Set TX OUTPUT (SONAR menu) to
		maximum.
	• Excessive TVG. Readjust TVG NEAR and FAR on the SONAR
		menu.
Somewhat strange	•	Brilliance too low. Adjust display brilliance.
color
Picture contains	• Equipment not grounded properly. Check equipment ground.
noise	• 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.
Picture does not	• Problem in tilt mechanism or control line. Contact a FURUNO agent
change when tilt		or dealer for advice.
angle is changed

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