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Chapter 7: Maintenance and Problem Solving 77
7.2 Problem Solving
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.
Common Problems and Their Solutions
Table 7-1: Common Problems
Problem Correction
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.