Raymarine Dragonfly-4 DV - Chapter 12: Maintenance and Cleaning

PossiblecausesPossiblesolutions
6.Withtheproductunderload,usingamulti-meter,checkforhighvoltagedrop
acrossallconnectors/fusesetc(thiscancausetheFishnderapplicationsto
stopscrollingortheunittoreset/turnoff),replaceifnecessary.
Vesselspeedtoohigh
Slowvesselspeedandrecheck.
Note:TheSonarchannelwillbeabletoholdbottomathigherspeedsthan
theDownVision
™
channel.
Bottomtooshallowortoodeep
Thebottomdepthmaybeoutsideofthetransducersdepthrange,movevessel
toshallowerordeeperwatersasrelevantandrecheck.(RefertoChapter15
Technicalspecicationfortransducerdepthrange.)
Note:Dependingonwaterconditions,theSonarchannelmaybeableto
achieveincreaseddepthrangeovertheDownVision
™
channel.
Poor/problematicimage
PossiblecausesPossiblesolutions
ScrollingpausedFromCursormode,presstheBackbuttontoenterscrollingmode.
Sensitivitysettingsmaybeinappropriatefor
presentconditions.
CheckandadjustsensitivitysettingsorperformaSonarreset.
Damagedcables
1.Checktheunit’sconnectorforbrokenorbentpins.
2.Checkthatthecableconnectorisfullyinsertedintotheunitandthatthe
lockingcollarisinthelockedposition.
3.Checkthepowersupplycableandconnectorsforsignsofdamageor
corrosion,replaceifnecessary.
4.Withtheunitturnedon,tryexingthepowercableneartothedisplay
connectortoseeifthiscausestheunittore-boot/loosepower,replace
ifnecessary.
5.Checkthevessel’sbatteryvoltage,theconditionofthebatteryterminals
andpowersupplycables,ensuringconnectionsaresecure,cleanandfree
fromcorrosion,replaceifnecessary.
6.Withtheproductunderload,usingamulti-meter,checkforhighvoltagedrop
acrossallconnectors/fusesetc(thiscancausetheFishnderapplicationsto
stopscrollingortheunittoreset/turnoff),replaceifnecessary.
Transducerlocation
Thepresenceofthinlinesataconstantdepthmaybeareectionofstructures
onthebottomofthevesselcheckthatthetransducerhasbeeninstalledin
accordancewiththetransducerlocationrequirements(referto3.10Selectinga
locationforthetransducerofthemanualfordetails).
Ifthetransducerismountedtoohighonthetransomitmaybeliftingoutofthe
water,checkthatthetransducerfaceisfullysubmergedwhenplaningand
turning.
Transducerkicked-up
Checkthatthetransducerhasn'tkickedupduetohittinganobject.
DamagedorfouledtransducerChecktheconditionofthetransducerensuringitisnotdamagedandisfree
fromdebris/fouling.
Damagedtransducercable
Checkthatthetransducercableandconnectionisfreefromdamageandthat
theconnectionsaresecureandfreefromcorrosion.
Turbulencearoundthetransducerathigher
speedsmayaffecttransducerperformance
Slowvesselspeedandrecheck.
Interferencefromanothertransducer1.Turnoffthetransducercausingtheinterference.
2.Repositionthetransducerssotheyarefurtherapart.
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Dragony–4/Dragony–5/Dragony–7/Wi–Fish