10.2Instrumenttroubleshooting
FaultCauseAction
Blankdisplay.Nopowersupply.
•Checkfuse/circuitbreaker.
•Checkpowersupply.
•CheckSeaTalk/SeaTalk
ng
cablingandconnector
security.
SeaTalk/SeaTalk
ng
informationnotbeingtransferred
betweeninstruments.
SeaTalk/SeaTalk
ng
cablingorconnectorfault.•ChecksecurityofSeaTalk/SeaTalk
ng
connections
betweenunits.
•CheckconditionofSeaTalk/SeaTalk
ng
cables.
•Isolatefaultyunitbydisconnectingunitsoneby
one.
AgroupofSeaTalk/SeaTalk
ng
unitsnotworking.SeaTalk/SeaTalk
ng
cablingorconnectorfault.•CheckthesecurityofSeaTalk/SeaTalk
ng
connectorsbetweenfunctioningand
non-functioningunits.
•ChecktheconditionofSeaTalk/SeaTalk
ng
cable
betweenfunctioningandnon-functioningunits.
LASTashingordashesdisplayedcontinuously
(depthgreaterthan3feet).
Transducercableorconnectorfault.•Checkconditionofthetransducercable(s)andthe
securityoftheconnections.
LASTasheswhenunderway.
Aeratedwaterduetovesselwakes,propellerwash
etc.
•Ensurereadingstabilizeswhenclearofdisturbed
water.
Troubleshooting
53