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9. MAINTENANCE
swab regularly so that dirt and dust build-up is easily removed. Use a dry swab to
wipe away moisture.
Retaining ring - inner side
5. Re-set the ball and retaining ring. Be sure the retaining ring is not inserted re-
versely.
9.7
Troubleshooting
The table below provides common symptoms of equipment troubles and the means to
rectify them. If the problem cannot be solved with the information supplied in this man-
ual, consult your local dealer for service.
Cannot turn on power
Cannot turn off power
Cannot operate the equipment
Strange noise from hull unit
Bottom echo becomes irregular
Weak echoes
Somewhat strange color
9-8
Swab
Supports
Symptom
Trackball housing
Troubleshooting
Check, remedy
• Check cables between transceiver unit, processor
unit and monitor unit.
• Check ship's mains.
• Have a qualified technician check the fuses inside
the transceiver unit.
• Check cables between transceiver unit and pro-
cessor unit.
• Press and hold the power key for approximately
seven seconds to force-shut-down the equipment.
• Check connections between control unit and pro-
cessor unit.
• Gears may require re-greasing. See section 9.2.
• Rough seas. Distance to the bottom changes due
to rolling and pitching.
• Long range selected. Transmission period is lon-
ger so ship's pitching and rolling are apt to affect
detection of echo.
• Output power set to minimum. Set power to maxi-
mum from main menu [1 TX/RX Setting] [3
Transmission Power].
• Adjust the gain with the GAIN knob. See
section 1.7.
• If either near echoes or far echoes only are weak,
adjust the [Near Gain] or [Far Gain] as appropri-
ate. See section 2.6.
• Brilliance setting too low. Increase the monitor
brightness.
Lens
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