Warwick Pro Fet II - Safety Instructions; Components and Spares; Accuracy of Measurements; Dismantling Instructions

1.3Safetyinstructions
1.4Componentsandspares
1.5Accuracyofmeasurements
1.6Dismantlinginstructions
General
Pleasereadthesafetyinstructionsontherearpanelbeforeopeningthedevice.Aboveall,be
suretodisconnectthedevicefromthemainsbeforecommencinganyrepairwork.Special
caremustbetakenwhenworkinginthepoweramplifierareasasDCvoltagesinexcessof
>140V(poweramplifier)maybepresent.Thenormalprecautionsshouldbeobservedwhen
workingwithMOSelements
Anypartsthatprovedefectiveshouldonlybereplacedbyoriginalsparepartsastheuseof
substitutetypescouldresultinashiftingoftheoperatingpoint,withtheresultthatthecorrect
operationofthedevic ecannolongerbeguaranteed.Thisisespeciallytrueintheareaofthe
poweramplifierwherecomponentshavebeenpreciselymeasured
Toremovethefrontpanel,firstloosenthe
screwshighlightedinblack.
Thenremovethepowersupplycableand
accompanyingcablefastenersfrom
insidethedevice.
Inordertodismantlethepoweramplifier,
loosenthescrewsmarkedingreyinFig.
2.Thenthecablesthatarepluggedin
shouldberemovedbeforethesoldered
cablesareseparatedfromtheircontacts.
Themeasurementsdocumentedinthecircuitspecificationsaretobeunderstoodas
approximatevalues.Anydeviationfromthestatedvaluesshouldnot,however,exceed10%.
Theoscillogramsforthemeasurementpoints(exceptMP7)beginatpage17.
FrontPanel
PowerAmplifier
Fig.2.: Positionofthesrews
a)frontpanel;b)base;c)rearpanel
a)
b)
c)
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