1.SettinguptheSG631LOGICforRecordPlayback
Operation
1.1AirCirculation
Thegreatestamountofheatdevelopsaroundthepowertransformer
whichislocatedatthecenteroftheventilatingslits.Theventilatingslits
mustbeleftfreeregardlessofthemachine'soperatingposition.When
installingthemachineina cabinet, a closedsectionofwallshelves,etc.,
becertaintoallowforsufficientaircirculationtoassureproperheat
exchange.
1.4A.C.MainsConnection,OperatingVoltage,Frequency,
MainsFuse
Themainsleadisattachedtothemachineandislocatedinthecov-
eredrecessinthefloor(orrear)ofthehousing(seeFig.1).Before
pluggingtheleadintoa mainspoweroutlet,ascertainthevoltageof
thepowersupply.
1.2OperatingPosition
TheSG631LOGICmaybeoperatedineitheruprightorhorizontal
position,orifdesired,inanytiltedposition.Inalloperatingpositions,
however,caremustbetakenthatthespoolsaresecurelyheldonto
thehubspindlesasdescribedinsec.1.6below.
1.3ExtendingConnectingLeads
WhenmatchingUHERplug-inextensionleadsarenotused,connecting
leadsshouldbeextendedonlybyanexperiencedservicetechnician
(seealso
sees.
2.3,2.4and2.5).
,
"
'-
TheSG631LOGICisfactory-settoanoperatingvoltageof220V,
butmaybeadjustedtooperateon
115
V A.C.Ifnecessary,setthe
voltageselectortothepropervoltage.
Beforeadjustingthevoltage,makecertainthatnoleadsareconnect-
edtoa mainspoweroutletandthatthemainsfuse,locatedinthe
fuseholder"A"(Fig.1)correspondswiththevoltagetobeselected.
Withtheaidofa coin,unscrewthefuseholder.Usea
0.8
A fusefor
220V A.C.,anda 1.6A fusefor
115
V.Oncetheproperfusehasbeen
inserted,theoperatingvoltagemaybechosenbyturningthevoltage
selector"B"(Fig.1)witha coin.Thevoltagevalueselectedwillappear
intherecess"C"(Fig.1)ofthevoltageselector.
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