Sea Tel 6003A Bedienungsanleitung

Field Service Procedure – Pol Motor Kit, 6003A/6004

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Document No

135282 Rev B

Tel, Inc.. This document may not be reproduced or distributed in any form without prior written

consent of Sea Tel, Inc. 



1. BriefSummary:

Troubleshootingdocumentfordiagnosingafaultwithandreplacingthepolmotoronthe6003Aand6004series

antennas.

2. Checklist:

VerifyRangeofMotion

VerifyPotRange

MeasureMotorVoltage

VerifyHarness

3. TheoryofOperation:

Theantennasfeedassemblyisdriventhroughits180degreerangeofmotionbya24VDCsteppermotorforthecorrect

orientationofthelinearsignal.BasedonthevesselsGPSpositionandthelookangletothedesiredsatellitetheDACwill

calculatethenumericalvalueforthepositionofthepolassembly,thePCUwillthensendthecommandtothePOLAux

relaytoissuevoltagetodrivethepolmotoruntilthepolpotoutputsthecorrectvalueatwhichpointthefeedwillbe

alignedtothepolarityofthesatellitesignal(provideditsbeencalibratedcorrectly).ThenasthevesselsailsandtheGPS

positionchangesthelookangletothesatellitewillalsochangeandadjustmentswillbemadetomaintaingoodcrosspol

isolation(alignmenttothesatelliteslinearsignal).

Anindicationthatthereisafaultwiththefeedalignmentofthesystemisthetargetlightwillbepermanently

illuminatedontheDACandtheantennawon’ttargetcorrectly,sitting8degreesabove(or8degreesbelowathigh

elevationlookangles)thesatelliteselevationlookangle.Aspartoftheantennastargetingprocedurethesystemwill

targetabove(orbelow)thesatellite,calculatetheautothresholdsettingbasedonthenoisefloorlevelandthenalignthe

feedforthecorrectreceptionpositionbasedonthevesselsGPSpositionandthelookuptableintheDACbefore

targetingthesatellite.

Ifthesystemisunabletodrivethepolmotorsothecorrectfeedbackisreceivedfromthepotorthepothasfailedand

won’tgivethecorrectfeedbackthesystemcan’tcompletethetargetingprocessandtheantennawillstay8degrees

aboveorbelowthedesiredtargetpositionofthesatellite.Settingthepoltypeto“0009”willmaketheantennatargetby

removingtheautopolfunctionfromthetargetingprocess;howeverthemissalignmentofthefeedwillcausebadcross

polisolation.

4. VerifyRangeofMotion:

FirstlyverifythesettingsintheDACarecorrect,thepolscaleshouldbesetto“0090”togivethefeed180degreesof

motionandthedefaultpoloffsetsettingis“0030”.

SetthepoltypesettinginthesetupmenuoftheDACto“0009”tochangethemodeofthepolassemblyfromautomatic

(poltype“0072”)tomanual.ThisremovestheautomaticcalculationbasedonthevesselsGPSpositionandallowsthe

feedassemblytobemanuallydrivenfordiagnosticpurposes.Nowenterthepolwindowanddrivethepolassembly

downintoitsendstop,observethepositionofthefeed.Nowdrivethepolassemblyup,thefeedshouldmove180

degreesundernormaloperation.



Field Service Procedure – Pol Motor Kit, 6003A/6004

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Document No

135282 Rev B

Tel, Inc.. This document may not be reproduced or distributed in any form without prior written

consent of Sea Tel, Inc. 



5. VerifyPotRange:

IfnofeeddriveispresentverifythepolreadingontheDAC,isn’toutofrange(i.e.displayingavalueofeither0or255).If

oneofthesevaluesaredisplayedit’spossiblethepotisn’talignedcorrectlyandthatadjustingitmaybringitbackto

withinthescaletheDACrecognizes.Backthepotofffromthemaingearsprocketandrotateitspulley,verifyingifthe

feedbackchangesontheDAConcethepothasbeenrealigned.Ifsocalibratethepolpotandverifyoperationas

describedinthelaterstagesofthisdocument.

IfthepolcountontheDACdoesn’tchangewhenthepotisadjustedthepothasfailedandisoutputtingadefaultvalue,

nodrivewillbeissuedtothepolmotorasthevalueisoutoftherangewhichthesystemoperatesin.Thenthepolpot

mustbechanged.

6. MeasuretheMotorVoltage:

Leavingthepoltypeinmanualmode,applydrivetothefeedassemblyandmeasurethevoltagetothemotorontheIDC

connector,12VDCshouldbepresent.Ifvoltageispresentbutthemotorisn’tdrivingthemotorisdefectiveandneeds

replacing.

Ifnovoltageispresentverifytheconnectionsofthereflectorharnessbymeasuringpintopinasperthebelowdiagram.



Iftheharnessconnectionsaregood,thenthepolauxrelayPCBisn’toutputtingthevoltagetodrivethemotorandneeds

replacing,shouldthisnotrectifytheissuethenit’spossiblethePCU,ortheinterfaceharnessisatfault.

WhentheantennaisinautopolaslongasthepolrangeiswithinthepotlimitstheDACwillissuethepoldrivecommand

tothePCUmotherboard,basedontheantennatargeting,achangeinthevesselsGPSpositionoroperatorinputs.The

PCUmotherboardwillthenissuethecommandtoswitchthepolauxrelaytodrivethepolmotor.Themotorwillthen

drivethefeeduntilthecorrectoutputfromthepothasbeenreceived,atwhichpointthefeedwillbeinthecorrect

receptionposition(providingthesystemisfunctioningandcalibratedcorrectly).Thereforethereisalsothepossibilityfor

apoldrivefaulttobecausedbythePCUmotherboard.



Field Service Procedure – Pol Motor Kit, 6003A/6004

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Document No

135282 Rev B

Tel, Inc.. This document may not be reproduced or distributed in any form without prior written

consent of Sea Tel, Inc. 



7. Replacingthe24VDCPolangMotorAssembly:

7.1. Tools.



Snips/Cutters

11/32”Wrench/Spanner

#1PhillipsScrewdriver

1/16”AllenWrench

Loctite222,242&638



7.2. Procedure.

Procedureforreplacingthe6003A/6004polangmotorusingSeaTelkitpartnumber:124108‐1(polmotorpartnumber:

124069‐1).



*CAUTION:Powerdownthepedestalbeforefollowingthis

procedure.

1.FirstlysetthepoltypesettingintheDACto“0009”(manualpol).



2.Usingapairofsnipscutthecabletiessecuringthepolmotor

harness.

3.NowremovethepolmotorsIDCconnectorfromtermination

blockPCBconnectionblockonthefeedassembly.



4.Usingan11/32”wrenchundothetwonutssecuringthepolmotor

assemblytothefeedandremoveit.



5.Usingthehardwaresuppliedinthekitbuildthereplacementpol

motorassemblyinthesameconfigurationasthedefectiveone.

ApplyLoctite242totheboltssecuringtheplatetothemotor&to

theoutermountingthreads.

6.Securethepulleytothemotorshaftinthesamepositionand

orientationasonthedefectivemotor,applyingLoctite638tothe

motorshaft&Loctite222tothesetscrew,tightenwitha1/16”

Allenwrench.

*Note:ForfurtherinformationrefertotheLoctiteProcedure

121730providedwiththiskit.



Field Service Procedure – Pol Motor Kit, 6003A/6004

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Document No

135282 Rev B

Tel, Inc.. This document may not be reproduced or distributed in any form without prior written

consent of Sea Tel, Inc. 

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7.Installthemotortothefeedassembly,applyLoctite242tothe

mountingthreadsandtightenthesecuringnuts.



8.ConnecttheIDCconnectortotheterminationblockandsecure

theexcesscablewithcableties.



8. PolAlignmentandVerification:

1. DrivethereflectortozerodegreesofelevationtoviewtheorientationoftheLNB:

PressthebuttontoturntheTrackingfunctionoff(ifapplicable)topreventtheantennafromgoingintoa

search.Pushthebuttonuntilthe‘Antenna’windowisdisplayed(thescreenwillshowtheAZ,ELandREL

values).Pressthebuttontwicetoisolatethe‘EL’windowandthenpressthearrowtoactivateit(acursor

willbedisplayed).Nowusetheandarrowkeystoscrollthecursoralongandusetheandarrowkeys

tochangetheelevationvalueto“00.0”andpressthebutton.

2. SetPolTypetomanualmode:

Enterthe‘SetupMenu’bypressingandholdingthearrowkeystogetheruntilthe“ELTRIM’windowis

displayed.Pushthearrowkeyuntilthe‘PolangType’windowisdisplayed.Pressthearrowkeytoactivate

thewindow.Nowusetheandarrowkeystoscrollthecursoralongandusetheandarrowkeysto

changethecharacters.Setthe‘PolangType’to“0009”whichismanualmodeandpressthebutton.

3. PressthebuttontogotoPolOffsetwindowandverifythedefaultsettingis“0030”.(Ifnecessaryusearrow

keystoselectappropriatedigitsandchangeaccordingly).

4. Nowkeeppressingthebuttonuntilthe‘Antenna’windowisdisplayed(thescreenwillshowtheAZ,ELand

RELvalues).

5. Pressthebutton4timesuntil‘POLxxx’isdisplayedandthenpressthearrowkeytoactivatethewindow.

*Note:It’sadvisabletohavesomeonewatchingthefeedwhilethepolisdriven.DrivingtheLNBpastitsnormal

rangeofoperationcancausedamagetotheassembly.

6. NowholdeithertheorarrowkeytorotatethePoluntilacountof“115”isdisplayed.



Field Service Procedure – Pol Motor Kit, 6003A/6004

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Document No

135282 Rev B

Tel, Inc.. This document may not be reproduced or distributed in any form without prior written

consent of Sea Tel, Inc. 



7. ObservethephysicalalignmentoftheLNB:

Itshouldbehorizontalpointingdownwards.Ifnotcontinueontostep8,otherwiseskipaheadtostep12.



(Steps8‐12requiresassistancetoobserveandoperateantennasimultaneously)



8. UsingtheDAC‐2202drivethefeedassemblytovertical:

PressthearrowkeytoactivatethecursoronthePOLwindow.Nowholdeithertheorarrowkeytodrive

thePolangleuntiltheLNBisalignedverticallyfacingdownwards(alignthecenteroftheLNBwiththelowerfeed

strut).Nowpressthebuttontode‐activatethewindow.

9. LocatethePolPotonthefeedandloosenthescrewthatsecurestheslottedmountingplate(fig.1.1)witha3/32”

AllenwrenchandthencarefullymovethePolPotgearoutofalignmentwiththemaindrivengear(Fig.1.2).



(Fig.1.1)(Fig.1.2)

10. Alignthepotentiometer:

OntheDACverifythecursorisnotdisplayedonthePolwindow,ifitispressthebutton(Fig1.3)failuretodo

thiswillresultindisplaynotchanging.Nowrotatethepotmanuallyuntilacountof115isdisplayed.Nowreinstall

thePOTonthemainsprocket(Fig1.4).

*Note:Whenre‐installingthepotontothemainsprocketitscommonforthereadingtochangeastheteethofthe

sprocketsareengaged.Becauseofthisthetoleranceis+/‐2degreesso113‐117counts.



(Fig1.3)    (Fig1.4)



Field Service Procedure – Pol Motor Kit, 6003A/6004

Page6of6



Document No

135282 Rev B

Tel, Inc.. This document may not be reproduced or distributed in any form without prior written

consent of Sea Tel, Inc. 



11. DrivethePolangtoitsupperandlowerelectricallimitsandverifytheassemblydrivesinthecorrectdirectionand

thatthefeedassemblyhas180degreesofrotation:

OntheACUpressthe arrowkeytodisplaycursorunderneathPolvalue.Pressandholdthearrowkeyto

drivethefeedtoitsupperendstopandverifytheLNBishorizontalwiththecoaxcabletowardstheleft.ThePol

valueshouldbeapproximately211counts.

NowpressandholdthearrowkeytodrivethefeedtoitslowerendstopandverifytheLNBishorizontalwith

thecoaxcablestowardstheright.ThePolvalueshouldbeapproximately28counts.

12. IntheDACsetupmenu,gotothePolTypeparameterandsetantennabackintoAutoPolMode:

Pressandholdthearrowkeystogetheruntilthe‘ELTrim’or‘AutoTrim’windowisdisplayed.Pushthe

arrowkeytoscrollthroughthesettingsuntilthe‘PolangType’windowisdisplayedandpressthearrowkeyto

activatethewindow.Nowusetheandarrowkeystoscrollthecursoralongandusetheandarrow

keystochangethevaluefrom“0009”to“0072”andthenpressthebuttontoputthesystembackinto

AutomaticPolang(AutoPol)mode.

WatchtheLNBandverifyitreturnstothecorrectreceptionposition(whilethePOLmotorisdrivingthetargetlight

willbeilluminatedontheDAC).



13. SavethesettingsintheDAC‐2202:

Pressandholdthearrowkeystogetherbriefly,“SaveNewParameters”willbedisplayed.Pressthe

arrowkeytoactivatethewindowandthenpressthebutton,“ParametersSaved”willbedisplayedandthe

poltypeandpoloffsetwillbestoredintheDAC.

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