Sharp SD-AT1000W Dokumentacja Pobierz pdf (Strona 249)

Maxiva UAX

October 17, 2013

5‐69

888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.

STEP 18 Carefullyseatthenewpalletonthebackplaneassembly.Theconnector

betweenthepalletandthebackplanemustbealignedandthehalvesfully

seated.

STEP 19 Installthefive(5)palletholddownscrews(Phillips).Don’ttighten.

STEP 20 Installthefour(4)centerpalletholddownscrews(Allen).

STEP 21 Tightenthefive(5)palletholddownscrews(Phillips).

STEP 22 Torquethefour(4)palletholddownscrews(Allen)to30in.lbs.

STEP 23 InstallthePhillipsscrewthatholdstheoutputcoaxinposition.Takecareto

carefullyaligntheinnerconductorwiththesolderpadonthepallet.

STEP 24 Soldertheoutputcoaxinnerconductortothepallet.

STEP 25 Solderthewiretothecommonpost.

STEP 26 Solderthetwoendsofthewiretotheboard.

STEP 27 Installtheinputlaunchboard(withthesmalladapterplugthatconnectsthe

boardtoJ6).Alsoinstallthealuminumhexstandoffsbetweentheboardand

thebackplane,installthetwo(2)Phillipsscrewsthatholdtheboardand

standoffsinplace.Tightenthescrews.

STEP 28 Resolderthethree(3)connectionsb etweentheinputlaunchboardandthe

pallet.Usenewjumpers.

STEP 29 Inspectandcleanupallnewlysolderedconnections.

STEP 30 Installtheconnector,standoffsandmoduleoutsidecase.

STEP 31 Installthemodulesidesandthefive(5)Phillipsscrews.

Note

Note the module cover may need to be squeezed into a position to allow easy insertion of the five (5) Phil-

lips screws. Insert all screws before tightening them.

STEP 32

Installthemodulecover.

STEP 33 ReplacethemoduleandclosethefrontcoverofthePABorLPU.

STEP 34 ThePAwillresumeoperationafterpressingtheactiveLPUOnbuttonfor

reset.

STEP 35 Endofprocedure.

5.10.9 PABFanReplacement

Therearefour50VdcfansintherearofthePAB.OnolderPABmodelsthefansareattachedtotherearpanel,newer

modelsmayhaveanaccesspanelcoveringthefans.Theaccesspanel,ifpresent,hasscrewsholdingthepaneltothe

chassis.Removethescrewswitha#1Phi

llipsscrewdriver.Thevariablespeedfansoperatecontinuou slywhenever

thetransmitterison.Thefansareredundant,anyfancanberemovedwhilethetransmittercontinuesoperating

withotheroperationalfans.Disconnectthesmallfanpowerplugandthentheremovethefourfanfasteners(usea

#2Phillipsscrewdriver).

Caution

THE FANS MAY CONTINUE TO ROTATE FOR SEVERAL SECONDS AFTER

REMOVAL. FANS WILL ALSO START UP AS SOON AS THEY ARE PLUGGED

IN IF PAB IS ON.

RefertoTable3‐15onpage3 ‐23torelatefannumberingtoGUIicons.

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Sharp SD-AT1000W Dokumentacja Strona 249

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