The fun of modifying started with my Nakamichi CDP-2e. Searching for another maybe better player I found a Sony CDP-227ESD, the second version with a pair of TDA-1541a DACs, one DAC for the left and the other DAC for the right channel.
Listening to this player in standard shape the difference in sound compared with the unmodified Nakamichi CDP-2e is very minimal.
Time to change this beauty
All the electrolytic capacitors are changed to Nichicon Fine Gold, Elna Silmic II and Sanyo Os-cons. Various other caps like bypass caps around the dac’s are changed for Wima’s with a higher capacity. To feed and filter the opamps a few Wima and Vishay MKP capacitors are used. For the output I use some Mundorf Mcap Aluminium in Oil are used because this was a bit of the magic in the modified Nakamichi.
The values of the old electorlytic capacitors where not so dramatic as the caps from the Marantz but soundwise there is an improvement.
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Hello, i would like, if I may, to ask you, how can we identify one sony version from the other (1 or 2 TDA)?
Hi Juan, the one Dac version has printed on the front 4 times oversampling while the 2 Dac version has the text: “8 times oversampling / 18 bit digital filter”
Regards,
Haarie
Hello. Great work, it’s like an artist’s painting.
I want to replace the original 35 years old capacitors of my Sony cdp-227. I recap my amps as a hooby but it’s my first time to recap a CD player and I’m not experienced in this.
C512 and C612 are 22uf but the Mundorfs are 6.8uf, is this value enough or is there a parallel capacitor somewhere i can’t see. Also, it may be difficult to find a capacitor at the original voltage, maybe that’s why you used high values, will this be a problem for ESR ? Thank you.
Hi Haarie you do the Grundig CD9009 mod on the dac’s. (DEM mod) costs almost nothing and is a big improvement. ( or buy the mod chip from Nanocamp $$$)
The Grundig Cd9009 mod for the tda1541 is another important and cheap mod. (DEM mod)