Re: Technics SU-v505 amp problem/discussion
No short circuit does *not* mean a transistor is okay. In particular, BJTs can go open-circuit too.
So when you're doing these measurements, I think it would be more helpful for both us and you to post resistance/diode readings in the following way
Q___: B-C xxx mV, B-E yyy mV, E-C zzz mV (though ideally o/c)
And again, I suggest pulling most of the components mentioned in post #28 above and checking them out of circuit rather than comparing each channel to the other. That's just not a reliable way to check things. Some circuit designs just don't lend themselves to checking certain components in circuit, no matter how many identical working and non-working units you have.
Otherwise, that's all I have for you. Without the above measurements, I'm pretty much all in the dark as to what's good and what's bad. It's not that I don't trust your word/knowledge, but to be 100% honest, I really dislike it when people tell me some component is reading as "good" without posting any measurement values. So for the sake of being on the same page, I always think it's helpful when people post measurements of their components.
No short circuit does *not* mean a transistor is okay. In particular, BJTs can go open-circuit too.
So when you're doing these measurements, I think it would be more helpful for both us and you to post resistance/diode readings in the following way
Q___: B-C xxx mV, B-E yyy mV, E-C zzz mV (though ideally o/c)
And again, I suggest pulling most of the components mentioned in post #28 above and checking them out of circuit rather than comparing each channel to the other. That's just not a reliable way to check things. Some circuit designs just don't lend themselves to checking certain components in circuit, no matter how many identical working and non-working units you have.
Otherwise, that's all I have for you. Without the above measurements, I'm pretty much all in the dark as to what's good and what's bad. It's not that I don't trust your word/knowledge, but to be 100% honest, I really dislike it when people tell me some component is reading as "good" without posting any measurement values. So for the sake of being on the same page, I always think it's helpful when people post measurements of their components.
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