Junsun V1 Pro FM reciever stopped working

[f3zz]

Hi!

I recently bought a Junsun V1 Pro 4GB + 64GB. And I got, like many other problem with microphone quality. Thanks to (https://forum.xda-developers.com/t/...ooth-phone-calls-junsun-v1-pro.4166471/page-3) I solved that problem.
And in the process i got new firmware from junsun and updated.

And then i connected headunit in car again and then FM stopped working. (Which was working perfect for a couple of weeks when troubleshooting bad microphone quality)
When starting the unit and then radio app there is a brief noise from radio that fades away quick. The channels are set to 0. And nothing happens if i try to scan for new.

I have triplechecked the connection to antenna, I measured the adapter for cable breaks.

I have tried a ton of settings in 8878.

I'll post screen of current settings, please help me troubleshoot this!

 

[Anton TNT]

Hi!

I recently bought a Junsun V1 Pro 4GB + 64GB. And I got, like many other problem with microphone quality. Thanks to (https://forum.xda-developers.com/t/...ooth-phone-calls-junsun-v1-pro.4166471/page-3) I solved that problem.
And in the process i got new firmware from junsun and updated.

And then i connected headunit in car again and then FM stopped working. (Which was working perfect for a couple of weeks when troubleshooting bad microphone quality)
When starting the unit and then radio app there is a brief noise from radio that fades away quick. The channels are set to 0. And nothing happens if i try to scan for new.

I have triplechecked the connection to antenna, I measured the adapter for cable breaks.

I have tried a ton of settings in 8878.

I'll post screen of current settings, please help me troubleshoot this!

Hi, first things first...
Antenna. It must be connected to a mass (zero) of car in order to work so check that first.
Second... Change Radio chip in system settings and see if it is misconfigured. TDA 7851 is the common one used in this devices.

P.S. in image I see that RDS is OFF turn this ON !

 

[f3zz]

Hi, first things first...
Antenna. It must be connected to a mass (zero) of car in order to work so check that first.
Second... Change Radio chip in system settings and see if it is misconfigured. TDA 7851 is the common one used in this devices.

P.S. in image I see that RDS is OFF turn this ON !

Hi Anton, thanks for engaging with me!

When you talk about the mass connection, do you mean at the antenna side or on the head unit?

I'll try the TDA 7851 with RDS On, but i've already tried a ton of combinations in this menu since problem started.
I thought that reset to factory would also reset these settings but unfortunatley it only reset android.
Anyone know how to get these settings to factory?

 

[Anton TNT]

Antenna works in that way that when jack is connected into antenna port mass of the car / or units mass - metal casing gives contact. But if it is not antenna case here and double checked, you can also check for a faulty GPS antenna if you have one , if faulty it can freeze radio , I had this problem on my old device. Go to GPS antenna test app and see if signal is constant with at least three satellites if not disconnect GPS antenna from unit and open radio app, see if works without GPS antenna. If yes, replace GPS antenna, buy new one.

 

[f3zz]

Hi Anton, thanks for engaging with me!

When you talk about the mass connection, do you mean at the antenna side or on the head unit?

I'll try the TDA 7851 with RDS On, but i've already tried a ton of combinations in this menu since problem started.
I thought that reset to factory would also reset these settings but unfortunatley it only reset android.
Anyone know how to get these settings to factory?

For IC Type values i only have these - ST 7786, NX 6686, Si 4702, QN8035,474X, 7708, 7703

And I have now tried all of them, with RDS ON.

 

[f3zz]

Antenna works in that way that when jack is connected into antenna port mass of the car / or units mass - metal casing gives contact. But if it is not antenna case here and double checked, you can also check for a faulty GPS antenna if you have one , if faulty it can freeze radio , I had this problem on my old device. Go to GPS antenna test app and see if signal is constant with at least three satellites if not disconnect GPS antenna from unit and open radio app, see if works without GPS antenna. If yes, replace GPS antenna, buy new one.

Ok, I quadruple checked the antennaport mass and checked GPS on which i have aprox 30 satellites.

 

[Anton TNT]

Something with update changed your RADIO chip consult with seller or gaver of update

 

[f3zz]

Problem solved now! I reached out to seller. And it turns out that "Radio" has to be in "Menu Icon" in order to function properly. (8878 Menu)

I removed radio since I wanted the button to open phone. Which I didn't got working anyway.

Thank you for helping!