Sharp SD-AT1000W Specifikace stáhnout pdf (Strana 240)

Section-5 Maintenance

October 17, 2013

5‐60

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.

8996

Topview.Looking down

fromrear of transmitter.

Load

LPU A

LPU B

Splitter

TopView.Looking down

fromrearof transmitter.

Top Pins

Bottom RF Con.

1 2 ... 235 236 237 238 239 240 241 242 243 244 245 ... 291 292

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Sharp SD-AT1000W Specifikace Strana 240