"Reference" TDA1541A DAC with I2S-BUS architecture - Page 53

dvb-projekt · 3rd March 2011, 06:44 AM

I think a few detailed photos of your setup could help!

studiostevus · 3rd March 2011, 05:44 PM

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?

Thanks for your help...

Malka07 · 3rd March 2011, 10:09 PM

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

studiostevus · 4th March 2011, 09:21 AM

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...

dvb-projekt · 4th March 2011, 10:47 AM

Did you have the V2.3 revision of the DAC module?

studiostevus · 4th March 2011, 02:08 PM

Yep

dvb-projekt · 4th March 2011, 05:42 PM

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?

studiostevus · 5th March 2011, 08:30 AM

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.

dvb-projekt · 5th March 2011, 01:23 PM

Quote:

Originally Posted by studiostevus

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.

dvb-projekt · 5th March 2011, 04:02 PM

The I2S switch module (e.g. USB & SPDIF) is ready

- 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
- 35µm 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%

View Poll Results: Surface Finish for future PCB´s
ENIG - Electroless Nickle/Immersion Gold	41	43.62%
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3rd March 2011, 06:44 AM	#521
dvb-projekt diyAudio Member Join Date: Feb 2009 Location: Willich, Germany Blog Entries: 31	I think a few detailed photos of your setup could help! __________________ Reference TDA1541A DAC project PCB´s / Tube-I-zator PCB / SSHV-Shunt PCB Stock status in my Blog

3rd March 2011, 05:44 PM	#522
studiostevus diyAudio Member Join Date: Oct 2009 Location: Brunei	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? Thanks for your help... __________________ -------- TDA1541a-S2 / 6072a / MediaplayerDac -- Michell Gyrodec -- Aikido Preamp -- Pass F5 -- Audio Physic Tempo 2SE -- Yamamura Cabling

4th March 2011, 09:21 AM	#524
studiostevus diyAudio Member Join Date: Oct 2009 Location: Brunei	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... __________________ -------- TDA1541a-S2 / 6072a / MediaplayerDac -- Michell Gyrodec -- Aikido Preamp -- Pass F5 -- Audio Physic Tempo 2SE -- Yamamura Cabling

4th March 2011, 10:47 AM	#525
dvb-projekt diyAudio Member Join Date: Feb 2009 Location: Willich, Germany Blog Entries: 31	Did you have the V2.3 revision of the DAC module? __________________ Reference TDA1541A DAC project PCB´s / Tube-I-zator PCB / SSHV-Shunt PCB Stock status in my Blog


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3rd March 2011, 10:09 PM	#523
Malka07 diyAudio Member Join Date: Mar 2009	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

4th March 2011, 02:08 PM	#526
studiostevus diyAudio Member Join Date: Oct 2009 Location: Brunei	Yep __________________ -------- TDA1541a-S2 / 6072a / MediaplayerDac -- Michell Gyrodec -- Aikido Preamp -- Pass F5 -- Audio Physic Tempo 2SE -- Yamamura Cabling

4th March 2011, 05:42 PM	#527
dvb-projekt diyAudio Member Join Date: Feb 2009 Location: Willich, Germany Blog Entries: 31	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? __________________ Reference TDA1541A DAC project PCB´s / Tube-I-zator PCB / SSHV-Shunt PCB Stock status in my Blog

5th March 2011, 08:30 AM	#528
studiostevus diyAudio Member Join Date: Oct 2009 Location: Brunei	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. __________________ -------- TDA1541a-S2 / 6072a / MediaplayerDac -- Michell Gyrodec -- Aikido Preamp -- Pass F5 -- Audio Physic Tempo 2SE -- Yamamura Cabling

5th March 2011, 04:02 PM	#530
dvb-projekt diyAudio Member Join Date: Feb 2009 Location: Willich, Germany Blog Entries: 31	The I2S switch module (e.g. USB & SPDIF) is ready - 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 - 35µm 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% __________________ Reference TDA1541A DAC project PCB´s / Tube-I-zator PCB / SSHV-Shunt PCB Stock status in my Blog

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