Specifications

Maxiva UAX
October 17, 2013
5‐41
888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.
Copyright©2013,HarrisBroadcast
5.8.9 TCUAirFilters
TheTCUfrontpanelcontainstwofilters(943‐5600‐109)thatshouldbeinspectedperiodicallyfordustbuildup.
LowertheTCUfrontpanel,usea#2PhillipsscrewdrivertoremovethefourTCUmountingscrews,andpulltheTCU
outoftherackusingbuiltinslides.Thenusea#1Phi
llipsscrewdrivertoremovethesixscrewsthathol dthefront
paneltothefrontpanelchassis.Afterthesixscrewsareremovedtipthefrontpanelforwardandthenupwardto
disconnectthetwotabsatthebaseofthefrontpanelchassisfromtheslotsinthefrontpanel.Drythefi
lters
thoroughlybeforereinstallingthem.DisconnecttheEthernetconnectorfromthePCMcardandthepower
connectorfromthepanelPCtoallowremovalofthefrontpanel.Thefilterscannowberemoved,washedwith
water,driedandreplaced.
5.8.10 TCUCards,ResetsandMemoryCards
ThereareoneortwopowersupplycardslocatedontheleftsideoftheTCUchassis,andtypicallyfourcardsinthe
rightsideoftheTCU.Ref ertoFigure5‐20onpa
ge5‐36.Theboardslotsarenumbered1through8,righttoleft.The
1stboard(furthesttotheright)istheMCM(MainControlModule), the2ndboardisthePCM(ProcessorControl
Module),the3rdboardisthetransmitterinterface,the4thisthecustomerI/Oboard.
Toga
inaccesstotheinternalboards,simplypulloutwardandthen downonthefrontoftheTCUpanel.The
openingsontheleftandrightoftheTCUfrontpanelcanbeusedashandles.
ShouldtheGUIscr
eenstopupdatingorgogray,i.e.,ifthesoftwarebuttonsorsymbolsarestillvisiblebuthave
turnedshadesofgrayinsteadoftheusualcolorschemeorifthescreenfreezesordisplayserrormessagesforan
extendedperiod,aPCMcardresetmayberequired.Tores
etthePCM,pulldowntheTCUfrontpanelexposingthe
circuitcardsintheTCUchassisasshowninFigure5‐20onpage5‐36.ThesecondboardfromtherightisthePCM
board.ThePCMres
etbuttonislocatedtowardthefrontcenteroftheboard(aninchfromthefrontedgefacingthe
transmitterinterfacecard...seeFigure5‐21onpa
ge5‐37).OnearlyversionPCMboardsitfacesoutwardtowards
theuser.Useafingertip(orthetipofapencilorpen)togentlydepressthesmallresetbutton.
Note
It will take approximately twenty seconds for the TCU to reset. If the transmitter is on the air, resetting the
TCU will NOT affect transmitter operation. Remote communications will be disrupted error messages
may display . The screen messages may repeat several times before the normal GUI display returns.
APCMsoftwarerestartorhard‐resetcanalsobeaccomplishedbypressingtheGUIsoftwarebuttonsTCUHOME>
SYSTEM>SERVICE>SOFTWAREUPDATEfollowedbyselectionoftheResettabandtheneithertheRestartorReboot
buttons.ThescreenandbuttonsareshowninFigure3‐20onpage3‐18.
Justinfr
ontofthePCM‐2restartbuttonisamicroSDcard,2GBwhichser vesasaharddriveforthecomputer
daughterboardonthePCM‐2card.ThecomputerimageandversionsofPCM‐2softwarearestoredonthiscard.
Thereisanotherres
etbuttontowardthebottomoftheMCMboard(farthestboardtotheright).Thisresetbutton
willalsoresettheTCUanditwillnottakethetransmitteroff‐air.
Justabov
etheMCMResetbuttonisaremovable2MBmemory cardcontainingsystemsoftware.Thiscardshould
beremovedandreinstalledinanyreplacementMCMcardthatisinstalled.Thememorycardisspeciallyformatted
usingFAT16.Orderreplacementmemorycards917‐2256‐104fromHarrisasrequired.