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Old 3rd November 2009, 11:23 AM   #31
NicMac is offline NicMac  Italy
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Thanks (I already got it - but anyway).
It looks like it might be worthwhile changing the onboard LM1117 3V3 supply on the transport with a good shunt type. It feeds the SAA7324 DAC chip (that draw around 20 mA). I will have to figure what else is feed by this supply (the xtal + ??). The laser controller (TZA1022) seems to run of 5V.
Maybe I will be able to destroy it all before even listening to it in its base configuration!!!
Nic
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Old 6th November 2009, 10:46 AM   #32
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5V supply mod finished
notice the dale resistors on the "fixed" Dexa regulators, 1k gives 5V, 5k gives an output of 15V
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Last edited by acidbrain; 6th November 2009 at 11:09 AM.
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Old 6th November 2009, 11:16 AM   #33
NicMac is offline NicMac  Italy
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Good work!!!
Can't wait to start doing my own (I will get it next week).....
Are all three 5V regs the same type? From where did you get these?
Thanks,
Nic
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Old 8th November 2009, 09:33 AM   #34
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Hi NIc,

They are all the same type, series shunt(I believe):

NewClassD UWB Regulators
Dexa Semiconductor regulators

I'm also using this reg on the 9V supply. A "Placid" didn't fit and runs hot at 700mA. This is also the easy way, placed instead of the second lm317(U21)
I hope TP soon brings out the new buff32 because I don't have a DAC to test.


The rubber rings on the crystalplatform are to be used for mounting the cdpro. If anyone wants to build this chassis, be careful, measure everything !
This because the supplied building instructions are rather poor or meant for something else, I got most things from photo's.
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Old 8th November 2009, 01:00 PM   #35
NicMac is offline NicMac  Italy
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The UWB DX78XX regulators specifies a max current supply of 630 mA. Does this not worry you on the 9V where peak current draw (at spin-up) is 700 mA?
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Old 8th November 2009, 01:23 PM   #36
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I'm just gonna try, if the Cdpro fails to spin right I will place a Placid instead.
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Old 8th November 2009, 08:46 PM   #37
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words don't come easy...
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Last edited by acidbrain; 8th November 2009 at 08:55 PM.
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Old 8th November 2009, 08:48 PM   #38
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SPIN THAT WHEEL
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Old 8th November 2009, 09:16 PM   #39
NicMac is offline NicMac  Italy
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Congratulations!!!
Did you close it up? How does the top lid mechanism function?
Now you just need a DAC, the buffalo is as great as their times of getting new version for sale.....
The unit "only" have digital output (SPDIF, EBU and Toslink). Have you been able to test the sonics in some way? There are also analog out headers on the CDPRO so you could connect these to your pre/power amp.
My assembly will take a bit longer as I hope to build in an EIAJ based NOS DAC for HQ analog output. Also I have some plans for replacing the L1117 3.3V reg and xtal on the CDPRO. I will be back with my progress.
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Old 8th November 2009, 09:39 PM   #40
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Yes it's finished !, my studyroom is a total mess. I'm adding a picture from the top mechanism, fully manually controlled
The sound is very good ( coming from my pc speakers), can't wait for that new Buff32 to come out. Which output should I use to connect the cdpro to the Buffalo ? SPDIF, EBU or Toslink ? Haven't got the knowledge about that yet.

Regards, Erik.
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