Specifications

Section-5 Maintenance
October 17, 2013
5‐60
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004
STEP 17 Usea#1PhillipsscrewdrivertoinstalltheT2901‐0215‐155Gexpansion
boardifrequired6screws).Ifthereisnoexpansionboardinstalltheclear
Lexancover.
STEP 18 Checkallconnectionsandhardwaretobesureitissecure.
STEP 19 Usea#2PhillipsscrewdrivertoinstalltheLPUtopcover(6screws).
STEP 20 InstalltheLPUintotherackasrequired.
STEP 21 PerformafunctionalchecktoconfirmproperoperationofLPU.Notethatthe
newsignalprocessorboardshouldcomefromthefactorywithsoftwareand
anewfeaturekeyinstalled.Thefeaturekeywillautomaticallybeusedonce
theLPUispoweredup.Recordthenewfeaturekeyforlaterreuse.Ifthe
newbo
arddoesnothavethepropersoftwareorfeaturekeycontactHarris.
STEP 22 Endofprocedure.
5.9.16 LPUCoaxialRelay
TheLPUcoaxialswitchispresentinsystemsthathavedualLPUsandaTCU.TheLPUrelayisusedtoconnecteither
LPUAorLPUBtoaPABortoasplitter(ifmultiplePABsarepresent).
Figure 5-45 LPU Coaxial Relay Diagram
There
layislocatedattherearoftheUAXcabinetontheinterior,rightside,wall.SeeFigure5‐46.
Figure 5-46 LPU Coaxial Relay
Pins1,2and3(onto
p)areusedforLPUswitching.Pin2has+12Vappliedtoit(comesfromTCU)andismarked
COMontherelaybox.
97
2
90
8996
Topview.Looking down
fromrear of transmitter.
Load
LPU A
LPU B
Splitter
1
2
3
5
6
7
TopView.Looking down
fromrearof transmitter.
Top Pins
Bottom RF Con.