Rotel-RC1090-pre-si 电路图 维修手册.pdf

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1、RC-1090 TRANSFORMER HUM MOD This modification is done to eliminate a hum that is heard from the transformer in the A. Rework Method for New Transformer 022T-1083T01 Substitution Step1,shortconnectpattern Step2,cutthepatterns Step3,replaceD903,D913bybridge“W02M” Step 4, replace transformer 022T1077T0

2、1 by 022T1083T01 Step5,Setupwires BLK ORG RED BLK BRW BRW TransformerInformation: CON4:22.7VDC,2.27A(afterbridge) CON5:25.0VDC,0.2A(afterbridge) CON6:2.25VACx2,0.2A 22.7VDC RadioFans.CN 收音机爱 好者资料库 + S S + S S MoredetailsofStep1andStep2 MoredetailsofStep3 RadioFans.CN 收音机爱 好者资料库 BeforeChange AfterCha

3、nge MoredetailsofStep5 RadioFans.CN 收音机爱 好者资料库 B. Rework Method for Temporary Strategy of Old Transformer 022T-1077T01 (Alternative option if there is no 022T-1083T01 transformer for substitution) Step1,shortconnectpattern Step2,cutthepatterns Step3,replaceD903,D913bybridge“W02M” Step4,Cutwires Step5,Redirectwires