Drive NOS AD1865/62,PCM1704/02/63,TDA1541 from FIFO: Universal I2S-PCM driver board - Page 90 - diyAudio
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Old 13th June 2017, 03:50 PM   #891
Cheng is offline Cheng  Singapore
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Hi Eldam,

Yes. The Kali has a u.fl mclk out, just that I'm not sure whether it works with the pcm board.

Hi Ian,

Thank you. Yes it is your isolatorpi in the second & third picture. I did not get them to work on the AD1865 & PCM1702. Don't know whats went wrong, as I assume all I2S signal should be a standard.

Maybe I should try your FIFO to isolate the problem. Or maybe it is the opamp IV, but I remember they work well with my other diyinhk dac.

I like to plan the boards positioning for testing before transferring them into a proper chassis

Cheng
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Old 14th June 2017, 07:00 AM   #892
vzs is offline vzs  Europe
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Cheng, did you double check that all I2S connections from DAC pins to source board u-fl or OK? also check at DAC pins the required voltages.
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Old 14th June 2017, 03:40 PM   #893
Cheng is offline Cheng  Singapore
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Hi vzs,

I have double checked all the u.fl connection from kali > PCM board > Dac board. I do not know the problem is the opamp IV or kali>ian pcm compatibility.

Do I really need a mclk data for ian pcm > dac board?

p.s. I have checked & confirmed the 5vdd and +-5Vcc input to the DAC too.

Cheng
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Last edited by Cheng; 14th June 2017 at 04:09 PM.
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Old 14th June 2017, 04:23 PM   #894
vzs is offline vzs  Europe
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Quote:
Originally Posted by Cheng View Post
Do I really need a mclk data for ian pcm > dac board
You need a MCLK to I2StoPCM board only, MCLK range can be 128*Fs to 2048*Fs.
I2StoPCM board uses that MCLK for reclocking the PCM signals sent to the DAC board.
So if you play Fs = 44.1KHz music you need at least 5.6448MHz MCLK for the PCM board.

Try to measure the signal frequencies at the DAC pins. I see you have (at least) a Fluke 115, with that you can check LLLR with 44.1KHz music you should see ~44.1KHz on the meter. If you have a better one measure CLK too.
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Old 17th June 2017, 03:36 AM   #895
Cheng is offline Cheng  Singapore
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Hi vzs,

Today I tried measured the LLLR pin11/pin14 & CLK pin12 on dac pin (ref to DGND pin13 ).

I got 0HZ at the LLLR.

I got 44.1KHZ at the CLK.

Does that means the problem is with the compatibility of kali & Ian pcm board?

Cheng
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Old 17th June 2017, 11:54 PM   #896
Dimdim is offline Dimdim  Greece
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It means that you should definitely re-check your cabling. 44.1K at (B)CLK points to a mixup in the cables.
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