10.2Instrumenttroubleshooting
FaultCauseAction
Blankdisplay.Nopowersupply.
•Checkfuse/circuitbreaker.
•Checkpowersupply.
•CheckSeaTalk/SeaTalk
ng
cabling
andconnectorsecurity.
SeaTalk/SeaTalk
ng
informationnotbeing
transferredbetweeninstruments.
SeaTalk/SeaTalk
ng
cablingorconnector
fault.
•ChecksecurityofSeaTalk/SeaTalk
ng
connectionsbetweenunits.
•CheckconditionofSeaTalk/SeaTalk
ng
cables.
•Isolatefaultyunitbydisconnecting
unitsonebyone.
AgroupofSeaTalk/SeaTalk
ng
unitsnot
working.
SeaTalk/SeaTalk
ng
cablingorconnector
fault.
•CheckthesecurityofSeaTalk/
SeaTalk
ng
connectorsbetween
functioningandnon-functioningunits.
•ChecktheconditionofSeaTalk/
SeaTalk
ng
cablebetweenfunctioning
andnon-functioningunits.
LASTashingordashesdisplayed
continuously(depthgreaterthan3feet).
Transducercableorconnectorfault.•Checkconditionofthetransducer
cable(s)andthesecurityofthe
connections.
LASTasheswhenunderway.
Aeratedwaterduetovesselwakes,
propellerwashetc.
•Ensurereadingstabilizeswhenclear
ofdisturbedwater.
Troubleshooting
75