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Marantz CD63 & CD67 mods list
Marantz CD63 & CD67 mods list
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Old 30th September 2008, 04:04 PM   #10901
6h5c is offline 6h5c  Netherlands
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Default CD63mkII-KI

Decoder section
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File Type: jpg cd63mkii-ki_decoder_2.jpg (96.1 KB, 286 views)
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Old 30th September 2008, 04:04 PM   #10902
SimontY is offline SimontY  United Kingdom
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Quote:
Originally posted by Thomo
Immediately switch off and sniff for smoke.

Duck & cover.

If you need specific help with these two stages, Simon is an expert and is usually only too willing to help.
O RLY
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Old 30th September 2008, 04:05 PM   #10903
6h5c is offline 6h5c  Netherlands
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Default CD63mkII-KI

HF amp
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File Type: jpg cd63mkii-ki_hf_amp.jpg (95.6 KB, 275 views)
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Old 30th September 2008, 04:07 PM   #10904
6h5c is offline 6h5c  Netherlands
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Default CD63mkII-KI

Nice close-up

You know where you can see the rest...

Ray
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Old 30th September 2008, 04:07 PM   #10905
SimontY is offline SimontY  United Kingdom
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Congratulations Ray, neat work and excellent photos as always.

Will you give us a brief summary of the mods?

Will you be trying the discrete output on this one?

Thanks,
Simon
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Old 30th September 2008, 04:09 PM   #10906
SimontY is offline SimontY  United Kingdom
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It looks like you've tinkered with decoupling for the driver chips, something I've not touched yet. Got some BGs waiting to be dropped in tho
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Old 30th September 2008, 04:13 PM   #10907
6h5c is offline 6h5c  Netherlands
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Thanks Simon. I'm glad I have a 63-KI in my collection now, so I can compare it to the 67-OSE. I'm looking forward to try the servo-clock, among other things. Plus, it looks very nice too

I have a mods list on-line with all the things I've done to it so far, it's a pretty standard list. I don't think i'm going to put a DOS in there for now; i'm working on a CD72 also, which is going to get an integrated ezDAC, directly connected to the I2S lines, and I'm going to finish that first. But who can tell, maybe after that... I have some PCB left.

Ray
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Old 30th September 2008, 04:18 PM   #10908
6h5c is offline 6h5c  Netherlands
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Quote:
Originally posted by SimontY
It looks like you've tinkered with decoupling for the driver chips, something I've not touched yet. Got some BGs waiting to be dropped in tho
That should give positive results, especially since the driver voltage is unregulated. I'm thinking about putting low-drop 9V regs in there. Off to dinner now...

Ray
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Old 30th September 2008, 04:28 PM   #10909
RCruz is offline RCruz  Switzerland
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Marantz CD63 & CD67 mods list
Default Re: CD63mkII-KI

Quote:
Originally posted by 6h5c
Tadaaa..... finally finished: my CD63-KI!
Hope I will be able to say the same very soon


My first question is:
There seems to be some errors in the CD53 schematics.

On the DAC chip, PIN 23 is RON (Right Negative PWM output)
In the schematic, it connects to RD24 ... RD28 ... Opamp PIN 3.
On this PIN 3 there is a + sign.

On the DAC, PIN 25 is RO (Right Positive PWM ouput)
Again we have DAC PIN25 ... RD22 ... RD26 ... Opamp PIN 2.
On this PIN 2 there is a - sign.

I am confused and need some imput because I am already working on the CDP.

Ricardo
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Old 30th September 2008, 05:27 PM   #10910
6h5c is offline 6h5c  Netherlands
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Hi Ricardo,

This is not an error. Marantz reversed the DAC's outputs so the signal is inverted. The second opamp also inverts the signal (the negative input is connected to the first opamp through R606/608), so the total phase shift is 360* and absolute phase is correct in the end.

Ray
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