11. MAINTENANCE, TROUBLESHOOTING

11.4Troubleshooting

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

 

 

Troubleshooting

 

 

 

Symptom

 

Check, Remedy

 

 

 

Cannot turn on

Check cables between transceiver unit, processor unit and

the power.

 

monitor unit.

 

Check ship’s mains.

 

Have a suitably qualified technician check the fuse in the

 

 

transceiver unit.

 

 

 

Bottom echo

Rough seas. Distance to the bottom changes due to rolling

becomes

 

and pitching.

irregular.

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 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.

 

 

 

Somewhat

Brilliance setting too low. Increase brightness with the

strange color

 

[BRILLIANCE] control.

 

 

 

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 appropriate menu among

 

 

H-SCAN SETTING, V-SCAN SETTING.

 

 

 

11-4

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Furuno FSV-84 manual Troubleshooting, 11-4, Symptom Check, Remedy