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11. MAINTENANCE, TROUBLESHOOTING
11.4
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.
11-4
Troubleshooting
• Check cables 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.
Check, Remedy
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Table of Contents
Troubleshooting
