Raymarine DS400 & DS500 用户手册

Chapter 7: Maintenance and Problem Solving

77

All Raymarine products are, prior to packing and shipping, subjected to 
comprehensive test and quality assurance programs. However, if this unit 
should develop a fault, please refer to the following table to identify the most 
likely cause and the corrective action required to restore normal operation.

If you still have a problem after referring to the table below, contact your 
local dealer, national distributor or Raymarine Technical Services 
Department for further advice. Always quote the product serial numbers. 
The serial number is printed on the back of the unit.

            

Table 7-1:  Common Problems

Unit does not function

1. Make sure that the power supply cable is sound and 
that all connections are tight and free from corrosion.
2. Check the system fuse. 

Display “freezes”

1. Check the Scroll Speed is not set to PAUSE.
2. Check the transducer cable for damage. 
If damaged, the cable and transducer must be replaced 
as a unit.

Unit does not display fish 

1. Fish arches may not be displayed if the boat is 
stopped; fish may appear on the display as straight line.
2. Ensure the transducer is within 10 ° of vertical.
3. Check that the gain is not set too low.

Unit does not see bottom 
or fish

1. Check that the transom-mount transducer hasn’t 
kicked-up on hitting an object.
2. Check that the gain is not set too low.
3. Check that the transducer is within 10° of vertical.
4. Check that the transducer face is not covered or 
fouled. If necessary clean the transducer.
5. Check the voltage from the power source; if this is too 
low it can affect the transmitting power of the sounder.

Unit is unreliable at high 
boat speeds

Turbulence around the transducer may be confusing the 
unit.

Unit displays a lot of back-
ground noise

1. Check that the gain is not set too high.
2. Check that the transducer is mounted correctly and is 
clean.