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Old 27th August 2006, 05:16 PM   #1
RnR is offline RnR  United States
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Default Schematic for Rotel RCD-1072

Might anyone have a schematic/parts list for this player?

Thank you!!
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Old 11th June 2009, 08:07 PM   #2
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Up for that.
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Old 12th June 2009, 06:48 PM   #3
Thomo is offline Thomo  United Kingdom
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I have Rotel RCD-1070 Service Manual.

I don't know if they're similar or not, but I shall upload it to my site now anyway as it may be useful.

I'll post a link in a couple of minutes.

Cheers, Lee.
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Old 12th June 2009, 06:53 PM   #4
Thomo is offline Thomo  United Kingdom
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Here you go:

http://www.diyhi-fi.co.uk/pdf/Service%20Manuals/Rotel/

Hope it helps.

Lee.

edit: Matthieu, did you realise you've resurrected a three year old thread? I only just saw it, LOL.
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Old 12th June 2009, 07:05 PM   #5
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That's cool, we're planing to mod one soon, very basics things like opamps, key caps and output caps.

According to this they may be very similar... average DAC only seducing for its HDCD ability.

Thanks Lee !
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Old 12th June 2009, 07:13 PM   #6
Thomo is offline Thomo  United Kingdom
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Hi Matthieu.

What dac is in your player?

I find that the dac chip itself is much less important to the sound quality, than how it's used, and most of all what output stage is used.

Cheers, Lee.
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Old 12th June 2009, 07:40 PM   #7
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PCM1732
There is only 2 op amps after like in the CD63, and as my friend is a bit scared on this I think simple & superbe LME49720HAs and Rubycon ZA/ZL around can do wonders.
I apologize for the fast statement of average quality DAC, like the Onkyo I had and like a Sansui with Mash I helped to mod these can sound very good with few, even if they are not the best...

Datasheet:
http://www.datasheetcatalog.com/data.../PCM1732.shtml
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Old 23rd June 2009, 06:31 PM   #8
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I have the service manual =)
MP if someone want it.

The BB DAC uses dc blocking caps before the opamps and after!
I may use good ones between DAC and opamps and nothing after LM4562 wich does not do much DC as far as I've tested on my players until now.
The question is what value there, manual talk of 50V/4.7F lytic cap (no mention of the brand/model) so I was considering some 4.7F Icel caps (size) or Obliggato MKPs... don't know If lower capacity is posible We can save room & money!
Maybe a clock ready to fit but I don't know where to find one. I'm a bit tired of making Fleas on test boards. There are Tentlabs' XOs on eBay at DIY Hifi but I don't know if these are copies or real stuff from Guido.

Any idea welcome

Matthieu
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Old 9th July 2009, 03:07 AM   #9
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Default Schematic for RCD-1072

Hello Matthieu,
I am new to the forum and cannot email you direct. Would you be able to supply the Service manual for the RCD-1072? I have a RCC-1055 which is the 5 disc cd player. It uses the same DAC, but uses OP275 op amps also has 4.7uF/25 volt coupling caps between DAC and opamps and then 100uf/25 volt caps between op amps and the rca outputs. The capacitors used are a brand I have never heard of (Su Con?). They are 85 c rated. I am going to replace all electrolytics with Rubicon low ESR. I am thinking of using Metalised polyester to replace the 4.7uF coupling caps but do not know about the 100uF maybe Panasonic Bipolar or FC. I am after the RCD-1072 manual to see the componets they used in the upmaket model. By the way I have replaced the power diodes with high speed low noise ones, this reduced the power supply noise a lot.

Any help very welcome
Regards
Giovanni
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Old 9th July 2009, 09:22 AM   #10
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Hi Giovanni,
unfortunately I can't mail you either, you may wait a while or give me your mail in clear.
Do change for MKPs, maybe you can take a nice Obbligato from eBay, same value.

Matthieu
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