Furuno CH-37BB, Руководство оператора

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8. MAINTENANCE
8-6
8.9 Troubleshooting
The table below provides common symptoms of equipment troubles and the means to
rectify them. If normal operation cannot be restored, do not check inside the system.
Any repair work is best left to a qualified technician.
Symptom Check
No picture Power supply.
Check ship’s mains voltage at the power plug connected to
the power unit.
Fuse.
If blown, replace with 3A fuse. Call service technician if it
blows again. NEVER use a fuse of a higher rating.
Bottom echo becomes
irregular Rough seas.
Distance to sea bottom changes due to rolling and pitching.
Long range selected.
Since transmission period is a little longer, ship’s rolling and
pitching are apt to effect detection of echo.
Weak echo TX OUTPUT POWER set to other than “C“.
Check the TX output power setting on the sonar menu, and
set it to “C” for max. output power.
TVG effect is excessive.
Excessive TVG results in elimination of useful echoes.
Note: Readjustment of TVG is required whenever the GAIN
control is suggested.
Somewhat strange color BRILL control set too low.
Increase the brightness.
Color partially irregular Magnet is near the screen.
This symptom occurs if equipment which contains a magnet
(loudspeaker, etc.) is placed near the screen. Separate the
magnetic equipment from the unit.
Note: If the symptom continues, consult with electronics
technician.