TAS2770EVM: No sound output

Dehua Li

Part Number: TAS2770EVM

I connected 2770EVM to my computer, and seems the power supply to it is normal, the computer can recognize it. but no sound out, if I put my ear close to the speaker, can hear idle noise

this set up works in my China colleagues' computer

I can play music on my computer's speaker. after I changed it to TI USA audio, it no sound
If I put my ear next to the speaker, I can hear a little idle noise.

over 3 years ago

0 Luis Fernando Rodriguez S. over 3 years ago

TI__Guru* 84915 points

Hi, Dehua,

Welcome to E2E and thank you for your interest in our products!

Our team will take a look at this and will provide a reply as soon as possible.

In the meantime, could you provide details about the PPC3 configuration, jumpers settings and if there's a difference on the system versions from your colleague's computer and yours?

Thank you.

Best regards,
Luis Fernando Rodríguez S.

0 Ivan Salazar over 3 years ago

TI__Guru* 95385 points

Hi Dehua,

Could you please share a picture of your EVM? I would like to verify all jumpers are setup correctly.

In addition, are you getting any error message from PPC3?
What do you mean by TI USA audio?

Best regards,
- Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Dehua Li over 3 years ago in reply to Ivan Salazar

Prodigy 100 points

0 Dehua Li over 3 years ago in reply to Ivan Salazar

Prodigy 100 points

0 Dehua Li over 3 years ago in reply to Ivan Salazar

Prodigy 100 points

Hi Ivan,

Setup and board picture uploaded. No error appeared.

Thanks

Dehua Li

0 Ivan Salazar over 3 years ago in reply to Dehua Li

TI__Guru* 95385 points

Hi Dehua,

Thanks for the picture, I see IRQ LED on, can you please check the flags from IRQ in Device Control panel?

In addition, I don't see the jumper at the address pin header, is it actually there?

Best regards,
- Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Dehua Li over 3 years ago in reply to Ivan Salazar

Prodigy 100 points

Hi Ivan,

For the address pin, do you mean J13? I don't have a jumper for it, maybe that's the root cause.

For IQR flags, please see the screen shot.

Thanks

Dehua LI

0 Ivan Salazar over 3 years ago in reply to Dehua Li

TI__Guru* 95385 points

Hi Dehua,

Yes, I mean J13.

You need to use a jumper on this pin header to select an I2C address. Default selection should be 0x82. Please install a jumper at this position and try again.
Let me know if you face any further problems.

Best regards,
- Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Dehua Li over 3 years ago in reply to Ivan Salazar

Prodigy 100 points

Hi Ivan,

I removed the jumper from J6(which is not connected) and put it in J13, connected the left bottom pins, but still no sounds.

the picture is below.

Thanks

Dehua Li

0 Dehua Li over 3 years ago in reply to Dehua Li

Prodigy 100 points

0 Luis Fernando Rodriguez S. over 3 years ago in reply to Dehua Li

TI__Guru* 84915 points

Hi, Dehua,

Thank you for the additional information and the EVM picture. Our team is reviewing this issue. We will come back with some information to solve this case.

Best regards,
Luis Fernando Rodríguez S.