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Old 27th June 2013, 04:47 PM   #671
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kopczas

Jean-Paul has designed this board, ask him about this.
One PSU is enough to fed 2 DAC boards.
From what I remember it could deliver about 250mA/5v.
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Old 27th June 2013, 06:14 PM   #672
kopczas is offline kopczas  Poland
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ok, I will.
I need to know distortion noise i max load of this power supply. I bet it not looks super nice
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Old 6th October 2013, 08:12 PM   #673
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Default Schematic

Hi Guys,

Could you please share or post the schematic of this ES9023 DAC Version. My DAC is experiencing some problems.

Thanks,

Fred
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Old 6th October 2013, 08:27 PM   #674
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Hi we don't publish schematic here. What is the problem with the DAC ? Is it a V2.6 ?
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Old 6th October 2013, 09:43 PM   #675
RollE2k is offline RollE2k  Sweden
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JP: This question maybe is answered already, but i haven't read through the whole thread since i lost interest when it became a SPDIF-version. But what i wonder is - will there be a I2S-version soon? and will there be a balanced version also?
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Old 6th October 2013, 10:23 PM   #676
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Good question as there are enough alternatives with ES9023 and I2S already. To be honest I am glad we have the SPDIF version ready at last. We will have to respond to this question shortly.

The BAL version was a Subbu only affair till now so I can not answer that one. I will ask Subbu for the BAL version.
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Last edited by jean-paul; 6th October 2013 at 10:49 PM.
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Old 7th October 2013, 06:03 AM   #677
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Quote:
Originally Posted by korben69 View Post
Hi skouliki

C10 & R11 seems fine to me, close values.
C11 is different as I've got -2.20/1.25 vs -1.70/1.73 ; 0.5V lost somewhere, check it
Is it due to Pin16 = 0v ? C11 seems to be a dedicated internal ES9023 cap.

ES9023 Pins
Pin1 -> R7______________Pin16 -> ?
Pin2 -> R8______________Pin15 -> R13
Pin3 -> R9______________Pin14 -> Gnd
Pin4 -> Gnd/C10_________Pin13 -> R12
Pin5 -> C10b+___________Pin12 -> Gnd
Pin6 -> R11/C9__________Pin11 -> C12/C32-
Pin7 -> R15/C15Gnd______Pin10 -> C11
Pin8 -> R14/C14Gng______Pin09 -> C11

Pin16 is 0v on your DAC, it seems to be faulty but on the scheme there is no connexion shown...
Your DAC values seems fine to me, except Pin16 and previous remark about C11.
Maybe someone more skilled than me could give an helping hand.
HI Jean-Paul,

Nice to hear from you. My problem is similar to Skouliki, see above measurements. Not sure if Skouliki fixed his problem on his DAC.

I'm looking for the schematic since I can't find where C12 is connected? Based on the previous responses/threads, the C12 is soldered on the back of the pcb in parallel with C32, is that right? This is what I'm trying to find out but can't find the schematic. I also checked all the voltages based on Korben's measurement and it matched all of them except C11. I will try to dig in more tomorrow when I have time to find out the problem, but if you guys have the answer then I would greatly appreciate it.

Fred
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Old 7th October 2013, 09:30 PM   #678
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Quote:
Originally Posted by jean-paul View Post
Hi we don't publish schematic here. What is the problem with the DAC ? Is it a V2.6 ?
Same questions.
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Old 7th October 2013, 09:46 PM   #679
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Hi.
The problem i had turned out to be a bad solder joint in one of the pins of WM8804 but cant remember which one, since it was many months ago.
I must also say congratulations to Jean-Paul and Subbu for creating this dac.
It sounds great indeed
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Old 8th October 2013, 04:00 AM   #680
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Quote:
Originally Posted by jean-paul View Post
Same questions.
It's version 2.6. The problem was no sound or signal on the output of the DAC. Again, its similar to Skouliki problem.


Thanks Skouliki for the tip. I will re-touch the pins again with the soldering iron.

I want to thank Skylab too for emailing me the build guide.


Fred

Last edited by fredlock; 8th October 2013 at 04:05 AM.
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