Arcam RCUBE - Important Safety Instructions; Follow All Warnings and Instructions; Water and Moisture Precautions; Heat and Ventilation Guidelines

Overview
TherCubeinitssimplestformcanbethoughtofasahighperformanceiPoddockingstation
withmorethanafewuniquefeaturestheseinclude.
WirelesstransmissionfromeitheriPodtransmitter(ArcamWand)orUSB(ArcamWave)these
arebothoptionalextras.
rCubescantransmittoeachotherfromadockediPodorexternalsourcewiredsource.
Internalbatterypowersupply.
EasilyreplaceableiPodheader(coveredlatterinmanual).
Access
AlthoughverycompacttherCubeisdesignedtobeserviceablewithaccessgainedfrom
underneathtoallelectroniccircuits(removethefourrubberfeet)youwillseefourPhilips
screws,oncetheseareremovedthebaseplate canbe liftedawayexposingthemaincircuit
board.Themainspeakerarrayisnotconsideredaserviceablepartbutwillbeavailableasa
completeassembly.Pleaseseedetailedexplodedview.
Circuitdescription
PSUandcharge
The19VD.CPSUfortherCubeisderivedfromeitheranexternalregulatedPSUorifnot
presentfromtheinternallithiumionbatterypacksthefollowingisadescriptionofthePSU
selection.
Theexternal19VpowersupplyisconnectedtoCon600andisinternallyfusedbythe4Afuseat
locationFS600therearpanelswitchcanbeseenatlocationSW600(a),D600isusedtoprevent
reversebias,D602andTR600fromaD.Csensecircuitthislinegoestothemainmicroat
locationU301pin7.
PSUselectioniscontrolbytheMAX1873Switchmode
LichargecontrolleratlocationIC603the
external19vsourcecanbeseentoarriveatpin15(DCin)andwhenpresentsimplyby‐passes
thechipwhilstbeingmonitoredbypins1/2(currentsense)andcanbeseentoformthe19v
sourcenetonthediagram.Theinternal
batterysourcecanbeseenconnectedtoCON602and
againtravelsthruthe2
nd
poleofswitchesavailableonSW600(b)D605andTR603areusedto
formsimplelogictoindicatetomicroU301thatbatterypowerispresent,D606allowsapathto
themain19vnetwhilstpreventingreversebias,theMosfet(M601)isusedtoenablechargeif
necessarywhenpower
ispresent–theentirecircuitisoverseenbythemainmicroU301via