Specifications

Section-5 Maintenance
October 17, 2013
5‐36
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004
5.8.3 DateandTimeSettings
TheTCUdateandtimesettingscanbeadjustedusingthelocalGUIscreen.SeeFigure3‐12onpage3‐12which
showsthelocalGUIservicescreenandTable3‐6onpage3‐13,whichexplainsthedateandtimesetting.
5.8.4 Installing/ChangingtheTCUPCMBattery
Transmittercontrolunits(TCUs)areshippedascomponentsinseveraldifferentHarristransmittermodels.TheTCU
containsdifferentprintedcircuitcardsdependingonthetransmitterapplication.TCUsthathaveGUI(GraphicalUser
Interfacetouchscreen)displaycontainaPCMcard.ThePCMcardisthesecondcardfromtherightwhenlooki
ngat
thefrontoftheTCU.
Figure 5-20 UAX TCU with front panel lowered
ThePCMca
rdcontainsabatterythatisusedbytherealtimeclocktomaintainthecorrecttime/datewhentheunit
doesnothaveACmainspowerapplied.TheunitistypicallyshippedwiththebatteryremovedfromthePCMcard.
Thebatteryshouldbeinstalledbefor ethetransmitterisplac
edintooperation.
Thecl
ockbattery(partnumber660‐0093‐000forolderPCMcardsand660‐0054‐000formorerecentmodels)is
packedinsideaplasticbagalongwithbatteryreplacementinstructions.OncethetransmitterisinstalledandAC
mainspowerhasbeenconnected,theclockbatteryshouldbeinstalledinthePCMca
rd.
5.8.4.1 PCM‐2BatteryInstallationInstructions
STEP 1 Turnoffthetransmitterandremovepowerfromthetransmittercabinetor
disconnecttheACplug(s)fromtherearoftheTCU.
Caution
TCU CARDS ARE NOT HOT SWAPPABLE. THE TRANSMITTER SHOULD BE
OFF AND THE POWER DISCONNECTED FROM THE TCU BEFORE REMOVAL
OF CARDS.
STEP 2 UsethefingerholecutoutsbuiltintothesidesoftheTCUfrontpanelas
handles,pulloutwardanddownonthefrontpanel.