Specifications

Section-5 Maintenance
October 17, 2013
5‐40
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004
TheMasterdipswitch(S4)shouldhaveposition1settoOnifthecabinetisthemainPAcabinetinsingleormultiple
cabinetsystemorsettoOffifitisasecondarycabinetinamultiplePAsystem.
5.8.8 TCUPSModuleMaintenanceandReplacement
TheTCUPSModule(front)isshowninFigure5‐20onpage5‐36.ThePSmodulesuppliestherequiredvoltagesto
theTC
Ucardsandfrontpanel.ThePSmoduleisnothotpluggable.
TheTC
Upowersupplymoduleshouldbecheckedperiodicallytobesurethatthereisnotexcessivedirtbuiltupon
thefancover.Ifdirtbuildupisevidentuseavacuumcleanertocleanoffthefrontcover.ThefiltersintheTCUfront
panelshouldalsobecheckedandcleane
dasneeded.Thefi ltersarewashableandcanberemovedfr omthefront
panel(seeSection5.8
.9onpage5‐41),washedwithsoapandwater,driedthoroughlyandthenreplaced.
Figure 5-24 TCU PS Module Fan
Duringtheperiod
icinspectionsbesurethatthefanisoperatingefficiently.ThefandrawsairintothePSmodule.
WiththeTCUinoperation,holdasmallstripofpaperdirectlyinfrontofthefanandbesureitispulledintowardthe
PSface.Ifthefanisno
tfunctioningproperlyitshouldbechanged.SimplyremovethePSfromtheTCUusingthe
instructionsthatfollow,unplugthefan,removethetwoscrewsthatholdthefanonthefrontpanel,andremovethe
fan.Thereplacementfanpartnumberis952‐9252‐006.
STEP 1
DisconnectTCUfromACmainspowersource.Thiscanbeaccomplishedby
disconnectingtheACplugsontheTCUrearpanelorbyturningofftheTCU
circuitbreaker.
STEP 2 Usea#1Phillipsorscrewdrivertoloosenthesinglefasteneronthetopfront
ofthePSmodule.Whenthefastenerislooseuseittopullthemoduleoutof
theTCUchassis.
STEP 3 SlidethereplacementPSmoduleintotheTCUchassistakingcaretoalignthe
upperandloweredgesinthechassisalignmentsl ots.BesurethePSmodule
connectorslineupandseatintotheconnectorintherearoftheTCUchassis.
STEP 4 TightenthefasteneronthetopfrontofthePSmodule.
STEP 5 ApplyACmainspowertotheTCU.ThegreenLEDontheupper,left,front,of
thePSmoduleshouldlight.
STEP 6 Endofprocedure.