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pre-c

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    Yamaha CR-2020 Pre - C Transistor Matching

    What are the matching pairs that need to be changed out on the A and B boards if one (or more) transistor fails? I found a bad TR502 (2sc1213a - NPN) on board A and a bad TR504 (2sc1213a - NPN) on board B. I understand the transistors need to be replaced in PNP/NPN pairs. With that being...
    • SharkBait07
    • Thread
    • pre-c transistor matching yamaha yamaha cr-2020
    • Replies: 0
    • Forum: Yamaha
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