Question RVL-AMP has no sound

[Sdouyoulink]

The RVL-AMP is connected to the Wii, and the Wii recognizes the uamp-hub. However, there is no sound from the speakers when entering the game. When connecting headphones, there is a lot of noise, but faint game sounds can be heard. What could be the problem?

 

[Gman]

There could be a wiring problem. It could be the digital audio wiring. If you shared more photos we may be able to determine it.

 

[Sdouyoulink]

There could be a wiring problem. It could be the digital audio wiring. If you shared more photos we may be able to determine it.

Here's my pcb wiring, I removed the GND for better viewing

 

[Gman]

Oh I thought you were using an rvl amp from the 4layertech store. This could be also design issue in the schematic, layout, or your pcb assembly.

 

[Sdouyoulink]

Oh I thought you were using an rvl amp from the 4layertech store. This could be also design issue in the schematic, layout, or your pcb assembly.

I also have a separate pcb board to test the lm49450, I flywire it to the wii motherboard and the results are the same!

 

[Gman]

We dont have a lot to go off of to help you debug it. We need photo of the wiring of the wii, close up photos of the pcb, your schematic, and any other info you can provide to be able to provide any meaningful feedback.

 

[Sdouyoulink]

We dont have a lot to go off of to help you debug it. We need photo of the wiring of the wii, close up photos of the pcb, your schematic, and any other info you can provide to be able to provide any meaningful feedback.
[/引用]
This is the schematic diagram I drew. It is connected to the Wii motherboard via a 20p connector. The GCVideo chip on the board supports audio input and output.
The wiring on the PCB board is connected via a flexible busbar. I have confirmed that the connection is fine.

 

[Gman]

Pin10 on the lm49450 is not connected to voltage on the schematic, but I see it appears to be connected on the pcb

 

[Sdouyoulink]

Pin10 on the lm49450 is not connected to voltage on the schematic, but I see it appears to be connected on the pcb

4-layer PCB, this pin is connected to the 3.3V on the second layer.

 

[Bryceshaw06]

Here's all that I noticed when looking at the schematic:

CPVDD is missing a 2.2uF capacitor to GND
HPVDD is missing a 2.2uF capacitor to GND
DVDD is not connected to 3v3 in the schematic like Gunnar mentioned

Last time I took measurements of the RVL-AMP, my multimeter read 3.15 kΩ for each of the i2c resistors. I don't know if that is correct or not, as 4.7k makes more sense to me.

Very cool design by the way! Hope you're able to get this audio issue sorted out.

 

[Sdouyoulink]

Here's all that I noticed when looking at the schematic:

CPVDD is missing a 2.2uF capacitor to GND
HPVDD is missing a 2.2uF capacitor to GND
DVDD is not connected to 3v3 in the schematic like Gunnar mentioned

Last time I took measurements of the RVL-AMP, my multimeter read 3.15 kΩ for each of the i2c resistors. I don't know if that is correct or not, as 4.7k makes more sense to me.

Very cool design by the way! Hope you're able to get this audio issue sorted out.

Thank you very much. I looked at the schematic again and it seems that the problem you mentioned does not exist, but I checked the wiring again and found some problems.