NAD-514-cd-sh59613 电路图 维修手册.pdf
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NAD 5000/5440/502/512/514 SERVICE HINT PROBLEM: Disc stops playing, or player wont accept a CD. Fault could be intermitted. CAUSE: Bad solderjoint of the focus transistors, 2SB1237R/2SD1858R or 2SB909/2SD1225. SOLUTION: Re-solder the joints. In case of a defect of one (or both) transistors, you can also replace them by 2SB649/2SD669 . The advantage of these replacement transistors is a better cooling, please do not mount them directly to the PCB, but keep some distance. PAGE 5-96-13 RadioFans.CN 收音机爱 好者资料库
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