gdonn7

Welp whining sound is still there after doing the changing the ground from the passenger footwell negative port to the screw...

RennKit-Dave

Buzzing or Humming Noise



BTR-3

Issues:

1. There is a small issue where when I'm on a phone call there's a buzzing sound coming from the speakers. Same thing happens if I try to use iPhone voice control (Siri). Have you heard of anything like this before?

Resolution:

1. First confirm there is constant power to the BTR-3 Module (check with 12V DC tester) at the small connector that connects to the BTR-3.

2. Make sure the BTR-3 Module LEDs light up (Red power, Blue BT connected)

3. Make sure you can pair your phone with the BTR-3 Module (pair to CARKIT).



From factory:

1. Reset the BTR-3 MODULE.

a. Press the "Reset" button on the BTR-3 MODULE for a second then switch off the ignition. Wait for a couple of minutes and try again.

2. Test with another phone

a. Make sure it is not an issue with a particular phone.

3. Check the microphone and the jack on the BTR-3 MODULE

a. Take the microphone to another device, see if it causes buzzing;

b. Use another microphone on the BTR-3 MODULE, see if it causes buzzing;

c. This is to identify if the mic is causing the problem.

From a customer:

Through manipulation of the phone volume and car volume, I was able to eliminate the problem and I’ve been unable to reproduce it since.Also, take a look at these videos:

https://www.psaudio.com/ps-how/how-to-find-and-fix-hum/

guppychao

The unit has an usb and extra aux ports. What have people used those for?

Can use the usb for charger for your phone. Anything else
what about the aux port

thanks. Just bought the unit and before I install wanted to know my options

RennKit-Dave

yes, the USB port can be used to charge a device. The USB and Aux are normally used to play content, instead of streaming with Bluetooth.

gdonn7

@RennKit-Dave Thanks! I'll try the reset

Edit: I see you mentioned the microphone, I did change mic's to the one that goes into the factory location, the buzzing did start around that time if memory serves me correct. I'll try removing the mic and see if that stops it too.