Project - Marantz CD5400 modding (pics) - Page 4

JonHarrison · 21st February 2006, 11:43 PM

Hi 4real,

I did put 'cd5400 service manual' 'cd5400.rar' and 'cd5400.pdf' into Google first before posting and drew a blank, honestly. Thanks for the link.

Jon

EC8010 · 21st February 2006, 11:46 PM

Quote:

Originally posted by 4real
Edit: what the hell happend here A whole bunch of posts has suddenly gone...!

Edit2: Ah, some split the threads.

Yes, I split the thread. It seemed to me that the clock modification was a thread in its own right.

I'd offer to email the manual, but it's an enormous file (45MB).

4real · 22nd February 2006, 08:57 AM

Quote:

Originally posted by iamwhoiam
A Polypropylene foil 8uF "Audio Grade" by LCR to replace the Elna Starget 10uF I originally had in there. Thing's huge and had to mount off board. [/B]

I hope you realize that those output caps are not the only ones in series! After the dac each channel has two 10uF caps in series as well!

gfinlayson · 22nd February 2006, 08:11 PM

I've zipped the 5400 manual and dropped it here. It should be a bit more manageable at 8.44 MB. It should also download reasonably quickly as well - it took only 16 seconds on my connection.

Max the Great · 4th March 2006, 08:19 AM

When I was checking the layout of the lowpass filter I dicovered something strange.

Resistor R201 (R301) is connected to R202 (R302)with capacitor C211 (311). According to the application note from Cirrus this capacitor should be connected to "earth".

http://www.cirrus.com/en/pubs/appNote/AN048Rev2.pdf

This application note shows the filter suitable for the CS4392.

Has anyone noticed this??

4real · 4th March 2006, 10:22 AM

Oh well, I guess, you should check how it is connected on the real PCB, since this manual isn't really acturate at times.

Max the Great · 4th March 2006, 02:57 PM

I did.

Anyone else?

4real · 11th March 2006, 05:20 PM

Quote:

Originally posted by Max the Great
Anyone else?

I might be on to something here maybee. I shorted all the six caps in the signal way, to check the sound without the caps. Well it improved, but guess what: I measured about 250 mV of DC on the output

. I'm going to check where this comes from next week. It could be the DAC, or the filter/buffer... If it's the buffer, that would indicate that there is something wrong with the design I guess, I can't imagine that those 250mV is intended. I changed the opamps to AD8620's though, but that should not matter I guess...

4real · 14th March 2006, 08:33 PM

Well, it turns out the DC comes from the DAC caps. If you leave them in, and short the output cap, you get no DC at all on the output!

So iamwhoiam, those huge LCR caps are not needed at all! Also, you gain more if you replace the DAC caps, as I did:

(never mind the cam)

I Replace all four 10uF elcos with 5.6uF 400V 5% Audyn MKP-QS caps, and shorted the output cap.

pwan · 21st October 2006, 02:58 AM

I'd like to have minimal touch on my CD5001.

A). What is the simplest but most audibly effective in term of sound improvement?

B) Will only change those 6 audio coupling cap (C201,C202, C301, C302, C210, C310) help? Thanks.

C). Will the electrolyte Blackgate N series (~ US$6 each) be worthing?

Thanks.

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21st February 2006, 11:43 PM	#31
JonHarrison diyAudio Member Join Date: Mar 2004 Location: UK	Hi 4real, I did put 'cd5400 service manual' 'cd5400.rar' and 'cd5400.pdf' into Google first before posting and drew a blank, honestly. Thanks for the link. Jon

22nd February 2006, 08:11 PM	#34
gfinlayson diyAudio Member Join Date: Jan 2006 Location: Aylesford, Kent, England	I've zipped the 5400 manual and dropped it here. It should be a bit more manageable at 8.44 MB. It should also download reasonably quickly as well - it took only 16 seconds on my connection.

4th March 2006, 08:19 AM	#35
Max the Great diyAudio Member Join Date: Feb 2006 Location: Amsterdam	When I was checking the layout of the lowpass filter I dicovered something strange. Resistor R201 (R301) is connected to R202 (R302)with capacitor C211 (311). According to the application note from Cirrus this capacitor should be connected to "earth". http://www.cirrus.com/en/pubs/appNote/AN048Rev2.pdf This application note shows the filter suitable for the CS4392. Has anyone noticed this??

4th March 2006, 10:22 AM	#36
4real diyAudio Member Join Date: May 2004 Location: Arnhem	Oh well, I guess, you should check how it is connected on the real PCB, since this manual isn't really acturate at times.

4th March 2006, 02:57 PM	#37
Max the Great diyAudio Member Join Date: Feb 2006 Location: Amsterdam	I did. Anyone else?

14th March 2006, 08:33 PM	#39
4real diyAudio Member Join Date: May 2004 Location: Arnhem	Well, it turns out the DC comes from the DAC caps. If you leave them in, and short the output cap, you get no DC at all on the output! So iamwhoiam, those huge LCR caps are not needed at all! Also, you gain more if you replace the DAC caps, as I did: (never mind the cam) I Replace all four 10uF elcos with 5.6uF 400V 5% Audyn MKP-QS caps, and shorted the output cap.

21st October 2006, 02:58 AM	#40
pwan diyAudio Member Join Date: Apr 2006 Location: Earth	I'd like to have minimal touch on my CD5001. A). What is the simplest but most audibly effective in term of sound improvement? B) Will only change those 6 audio coupling cap (C201,C202, C301, C302, C210, C310) help? Thanks. C). Will the electrolyte Blackgate N series (~ US$6 each) be worthing? Thanks.

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