Problem Solving; Common Problems And Their Solutions - Raymarine DSM30 Installation Manual

Chapter 2: Maintenance and Problem Solving

2.3 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 2-1: Common Sounder Problems
Problem
Display "freezes"
Sounder does not display
fish
Sounder does not see
bottom or fish
Sounder displays a lot of
background noise
Sounder speed or log
readings are wrong
Correction
1. Check that the scroll speed is not set to zero.
2. Check the transducer cable for damage. If damaged, the
cable and transducer must be replaced as a unit.
1. Fish arches are not displayed if the boat is stopped -
fish 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.
1. If you have a transom-mount transducer, check that the
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.
1. Check that the gain is not set too high.
2. Check that the transducer is mounted correctly and is
clean.
1. Check that the transducer paddle wheel is clean.
2. If necessary add a speed offset.
3. If receiving SeaTalk speed, unplug the SeaTalk connector
from the display.
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