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"Reference" TDA1541A DAC with I2S-BUS architecture
"Reference" TDA1541A DAC with I2S-BUS architecture
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Old 3rd March 2011, 07:44 AM   #521
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
I think a few detailed photos of your setup could help!
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Old 3rd March 2011, 06:44 PM   #522
studiostevus is offline studiostevus  Netherlands
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I hope it will... Sorry for the mess, i have been trying quite some things to find the problem.

How do i check whether spdif signal is locked? What is the expected output voltage at tda output?

Click the image to open in full size.

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Click the image to open in full size.

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Thanks for your help...
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Old 3rd March 2011, 11:09 PM   #523
Malka07 is offline Malka07  England
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Hi Studiostevus,

On your dac pic, I see no signal return/gnd connected at audio out...could this be the reason for no sound?

Alon
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Old 4th March 2011, 10:21 AM   #524
studiostevus is offline studiostevus  Netherlands
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I have connected the grounds via my dmm cables. Not perfect, and i will end up with star ground once i yet everything running.
But even with imperfect gnd, there should be some sound...
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Old 4th March 2011, 11:47 AM   #525
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
Did you have the V2.3 revision of the DAC module?
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Old 4th March 2011, 03:08 PM   #526
studiostevus is offline studiostevus  Netherlands
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Yep
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Old 4th March 2011, 06:42 PM   #527
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
As far as i could see it on the pictures, there is no failure in the connection.
Are the 3 voltages (+5V, -5V, -15V) direct at the TDA1541A correct?
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Old 5th March 2011, 09:30 AM   #528
studiostevus is offline studiostevus  Netherlands
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Ok, so that should not be the problem.

I read somewhere that i should read 3-4V dc at the output of the tda. Can somebody confirm that, because I dont get that?

Also if i put in a test resistor to ground, i would expected at least voltages that vary with the music. I dont get that.

I do get i2s signal that varies with the music though (on/off), so my working hypothesis is that the i2s going to dac is ok.
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Old 5th March 2011, 02:23 PM   #529
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
Quote:
Originally Posted by studiostevus View Post
Ok, so that should not be the problem.

I read somewhere that i should read 3-4V dc at the output of the tda. Can somebody confirm that, because I dont get that?

Also if i put in a test resistor to ground, i would expected at least voltages that vary with the music. I dont get that.

I do get i2s signal that varies with the music though (on/off), so my working hypothesis is that the i2s going to dac is ok.
Normally you should measure some small AC (mV) at the output with connected I/V resistor.
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Old 5th March 2011, 05:02 PM   #530
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
The I2S switch module (e.g. USB & SPDIF) is ready

Click the image to open in full size.


- separate relays for each I2S signal to get the maximum HF-Isolation
- based on the Takamisawa NA-5WK relay, witch has minimal HF-Insertion loss
- 2mm pcb
- Immersion Gold
- green soldermask on both side
- 35m copper weight
- Board size 45mm x 35mm

The price for it is $8 (naked module as on the right side on the photo)

Worldwide shipping: $ 4
paypal fee: 3,9%

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