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Furuno DS-80 User Manual

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15
3.2 Troubleshooting 
This section provides troubleshooting procedures. Advanced level troubleshooting should 
be done by referring to the Service Manual (optional supply). 
Problem Probable 
cause 
Remedy 
General 
Loosened power cable 
Fasten the power cable. 
Cannot turn on the 
power. 
Blown fuse 
Replace the fuse. 
Power is on but 
nothing appears on 
the screen. 
Contrast too low. 
Press the [*] key several times. 
Doppler speed indication 
10.0  
12.50
SPEED
DISTANCE
                                           nm
Last correct speed is displayed
(display freezes).
Reverse video and blinking
kt
STW
 
Ship’s speed cannot be calculated 
because of air bubbles, etc. (Speed error : 
30 seconds) 
SPEED
DISTANCE
                                           nm
**. *
12.50
Speed shown as "**.*".
kt
STW
 
• 
Problem with the transducer or air 
bubbles. 
• 
Speed error continues more than 30 
seconds.
 
SPEED                         STW
DISTANCE
                                           nm
10.0  
12.50
STW
flashing
kt
 
• 
Temperature sensor is abnormal. 
GPS speed indication 
**.*
12.50
SPEED                           GPS
DISTANCE
                                           nm
Speed indication shown as "**.*".
kt
GPS data error. 
SPEED
DISTANCE
                                           nm
12.50
"GPS" is replaced with "----".
----
kt
---
 
• 
No GPS data for 30 seconds. 
• 
GPS receiver disconnected. 
If any abnormal speed indication continues 
contact your dealer for advice.