NAD-3140-int-sm 维修电路原理图.pdf

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RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库SBUSA066Page2NOTE:Installzenerswithcathode(stripe)totheright,asseenfromfrontofunit.PaulJ.CeurvelsNationalServiceManagerP.S.Pleasenotethatlaterproductionunitsaremanufacturedwithasimilarcircuit:1)TransistorsQ627,Q629arereplacedwith22Vwzeners.2)ResistorsR677,R678,RG87,R688arechangedfrom2.7Kto3.3K,!w.5