Furuno GP-1640F, Руководство оператора, Страница: 93 / 108

13-3
Table 13-3 Simple troubleshooting (sounder)
If… Then…
Check if picture advance speed is set to “STOP” on the
sounder setup options menu.
No picture but marks and characters appear
Check for loosened transducer connector.
Picture appears but no zero line
If using manual video sounder operation, range is shifted;
set shifting to zero to correct.
Check gain setting, if using manual operation.
Marine life or air bubbles may be clinging to transducer
face.
Water may be dirty.
Picture sensitivity is too low
Bottom may be too soft to return a suitable echo.
Depth is not displayed Adjust gain to display bottom echo in dark tone.
Check if transducer cable is near ship’s engine. If it is,
relocate it.
Check ground. Noise or interference obstructs the display
Other video sounders may be operating nearby and on
same frequency.
Water temperature graph appears but no or
wrong readout.
Check for loosened sensor cable.
13.4 Error Messages
This equipment displays the following error
messages on the alarm menu to alert you to
possible trouble.
Table 13-4 Error messages
Error message Meaning, remedy
NO GPS FIX No GPS signal
VOLTAGE OF
INTERNAL BATTERY
IS LOW. Voltage of internal
battery is low. Request
replacement of battery.