9. MAINTENANCE
9-8
swab regularly so that dirt and dust build-up is easily removed. Use a dry swab to
wipe away moisture.
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.
Troubleshooting
Symptom
Check, remedy
Cannot turn on power
• 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.
Cannot turn off power
• 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.
Cannot operate the equipment
• Check connections between control unit and pro-
cessor unit.
Strange noise from hull unit
• Gears may require re-greasing. See section 9.2.
Bottom echo becomes irregular
• 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.
Weak echoes
• 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
• If either near echoes or far echoes only are weak,
adjust the [Near Gain] or [Far Gain] as appropri-
ate. See section 2.6.
Somewhat strange color
• Brilliance setting too low. Increase the monitor
brightness.
Trackball housing
Supports
Retaining ring - inner side
Swab
Lens
Summary of Contents for FSV85MK2
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