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| Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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22nd Feb 2019, 6:58 pm
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#1 |
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Tetrode
Join Date: Feb 2019
Location: Veldhoven, The Netherlands
Posts: 56
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Marantz CD-84
Hi all,
I have a Marantz cd-84 cd player with a distortion on one channel.Today i opened it up and looked at is and did not see strange things.I want to make this player play well again but not break it more  For that i have enough other players.Are there simple things to look at? I made a short sound recording where you can hear the distortion on one channel.If you can use balance it is clear the distortion is from one channel.The recording is pretty loud.Is this a typical sound for something?If i manage to follow the path using the scematics can i test things inboard?Have to work on it tomorrow at daylight because my vision is not good enough now.Are there any suggestions?Leon. |
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23rd Feb 2019, 1:15 am
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#2 |
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Tetrode
Join Date: Feb 2019
Location: Veldhoven, The Netherlands
Posts: 56
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Re: Marantz CD-84
I came to this add.This is crazy right?It is not my goal to make money out of things.I want to learn things so i can make a job out of my passion
 http://www.audioscope.net/marantz-cd...890.html?ref=3 I am in good contact with the seller of my past receiver i bought.I was lucky and he is happy for me.This cd player i bought as a set and the seller comes over when i restored it. Why those crazy prices?In this video you see where it went wrong.I made the video of a small cd player for someone who wanted proof it was working.The bids went sky high.And the Philips "Black Tulip" set i liked and sold it for 10 times i payed and 5 times less it's worth for freaks :-( https://vimeo.com/254312625 It's crazy.We all like a bargain but why those prices? |
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24th Feb 2019, 4:14 pm
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#3 |
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Heptode
Join Date: Mar 2011
Location: Dorset, UK.
Posts: 521
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Re: Marantz CD-84
Hi Leon,
A quick analysis on your audio sample shows quite significant distortion on the right channel. See attached. Perhaps I would be inclined to start checking pin voltage around Q526 (JRC4560) op-amp and circuitry with a DVM etc. Assume power supplies are correct? Also noted there is slight clipping on the left channel, but this may actually be intended  Rich
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To an optimist a glass is half full; a pessimist half empty; an engineer twice as big as need be! |
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26th Feb 2019, 12:47 am
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#4 |
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Tetrode
Join Date: Feb 2019
Location: Veldhoven, The Netherlands
Posts: 56
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Re: Marantz CD-84
Hi,sorry for my late reply,i met some nice girl this weekend
 Rich,what you are asking is abacadabra for me now.Before i ask any more questions i go find out what your talking about.I go learn that. The recording was too high so it might be the other channel is ok.First i go find ot what you telling me to look for.If i succeed we look further if there is any things on the other channel.Thanks,i go look into it. Leon |
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