Specifications

Section-5 Maintenance
October 17, 2013
5‐68
Copyright©2013,HarrisBroadcast
WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004
thefactory .Thiswireassemblyshouldbereplaceduponreassemblyandnot
reused.
Note
On reassembly the wire needs to be replaced and the two leads must not touch any component on the
board other than the two points where they are soldered. The pallet board should be placed over the post
and tightened down before soldering the wire to the post.
STEP 11 RemovethePhillipsscrewthatholdstheoutputcoaxinplace.Takenoteof
thepositionofthecoax.Whenreinstalleditmustnottouchanycomponents
ontheboard.Itshouldonlycontacttheboardatthepointwhereitis
soldered.
Note
Do not place upward or side pressure on the coax inner conductor as this might pull the solder pad off the
board.
STEP 12 Desolderthecoaxialinnerconductorfromthepallet.
STEP 13 Removefour(4)centerpalletholddownscrews(metricAllenhead).These
fourscrewsmustbetorquedto30in.lbs.uponreplacement.
STEP 14 Removefive(5)additionalpalletholddownscrews(Phillipshead).
STEP 15 Removepalletandcleanupheattransfercompound.
Note
Removal of the pallet may be difficult due to the presence of the heat transfer compound under the pallet
board. Insert a flat blade screwdriver beneath the aluminum edge of the pallet assembly where it meets the
aluminum back plane assembly. Use the screwdriver to gently pry upward without placing stress on adja
-
cent components. Repeat this process along the edges o
f the board in several places until it loosens up.
Take care not to scratch up the pallet or the back plane assembly. The pallet should be lifted straight up off
the back plane assembly to avoid damaging the connector that connects the pallet and the back plane
assembly.
STEP 16
ReadnotesbelowandfollowtheremainingstepstoinstallthenewPA
pallet.
Note
Module Reassembly Reminders:
• Ifpossibleusenewfastenerswhenreassemblingmodule.
• Avoiduseofexcessiveheatwhichmaydamagecomponentsorboards.
• Allleadsandpadsshouldbetinnedpriortosoldering.
• Newjumperribbonsshouldbeusedatthethreeinputconnections.
• Installallfastenersineachsubassemblypriortotighteningthem.
• TheHOTWarninglabelontopcoverplateshouldbeupandpositionedtowardthehandle.
Caution
COMPONENTS ON THE PALLET CONTAIN TOXIC BERYLLIUM AND MUST
BE PROPERLY DISPOSED OF. FOLLOW ALL APPLICABLE LAWS FOR
DISPOSAL OF HAZARDOUS MATERIAL.
STEP 17 Reapplyheattransfercompound.Useasmallroller(inkroller)orflatedgeof
flexibleplasticcardtoapplyeven,thincoat.