awise1961
Super Member
The honeymoon is over.
My new to me AU-9500 has developed its first problem.
Last night after being enamoured by this units sound and power all weekend, it started having as terrible staticy, crackling sound coming from the left channel. This sound started every so slowly and I initially thought it was a bad album track, but alas it progressed. It is independent of the volume level. Turning the volume all the way down does nothing to subside it. As is with all of the other switches and and functions. The only thing to stop the sound is to turn off the unit. I performed the usual process of eliminations by plugging in the right speaker into the left and so on, and also trying another pair of speakers. The problem stays with what ever is connected to the left channel. I also tried "Speakers B" and Speakers C" and it persisted and only on the left channel. Next, I repmoved my turntable connections and the noise did not go away even though there was no source plugged in.
It is my opinion that I have one, or more capacitors leaking AC voltage on the left channel driver board.
Unfortunatley I am Logan airport as I write this on my way to LA. for business until late Wednsday and won't have a chance to play with it until Thursday. I downlaoded and printed out the service manual and I wil study on my flight shortly.
If this is indeed the problem, I would like to order the CAPs for both the left and right boards and do a total replacement. I would like to order the components tonight from my hotel room so they can arrive at the end of this week. Any reccomdations and opinions are greatly appreciated. Especially if it is determined to be the CAPs, what brand, what values, and where should I purchase them?
Thanks, Al. Wise
My new to me AU-9500 has developed its first problem.
Last night after being enamoured by this units sound and power all weekend, it started having as terrible staticy, crackling sound coming from the left channel. This sound started every so slowly and I initially thought it was a bad album track, but alas it progressed. It is independent of the volume level. Turning the volume all the way down does nothing to subside it. As is with all of the other switches and and functions. The only thing to stop the sound is to turn off the unit. I performed the usual process of eliminations by plugging in the right speaker into the left and so on, and also trying another pair of speakers. The problem stays with what ever is connected to the left channel. I also tried "Speakers B" and Speakers C" and it persisted and only on the left channel. Next, I repmoved my turntable connections and the noise did not go away even though there was no source plugged in.
It is my opinion that I have one, or more capacitors leaking AC voltage on the left channel driver board.
Unfortunatley I am Logan airport as I write this on my way to LA. for business until late Wednsday and won't have a chance to play with it until Thursday. I downlaoded and printed out the service manual and I wil study on my flight shortly.
If this is indeed the problem, I would like to order the CAPs for both the left and right boards and do a total replacement. I would like to order the components tonight from my hotel room so they can arrive at the end of this week. Any reccomdations and opinions are greatly appreciated. Especially if it is determined to be the CAPs, what brand, what values, and where should I purchase them?
Thanks, Al. Wise