You should check if ACC wire only provides power when the ignition is on.
Sounds like you need to swap the red and yellow wires around. Not sure why, but this can be a common issue on some VW's.
Du you want to flash the latest firmware for Junsun with Mtk825X CPU? This may fix some or none of your problems.
Fist things come to my mind:
Since there is no OTA option...i would not try a firmware update. Everything else is working just fine. I saw others complain of worst issues after fw flash (like radio issues).
I Have one of this and dont work.Fist things come to my mind:
Is there a OEM camera available? Maybe you can use existing mounting / fixing points.
Do you have a can box connected? If not the reverse lines will be static. In this case it could make sense to choose a camera which is drawing the static lines by its own. Reason: Android can draw the lines but if you drive backwards while Android is still booting you don't get lines.
And you should test the camera before(!) you drill holes into your car.
I'm using latest fw without issues. You should remove the USB stick during boot after flashing so the head unit will not store configuration data on the pen drive.
Maybe you have to change the video format in factory settings? I think it can be changed in factory settings (8878), section Others.
Any link from were can i get the FW? I will first look into unit to make sure i dw the correct version. Should i enter the hidden menu and look for specific thing? Or look into Android settings , at about section?
You're sure the camera is connected correctly and the video signal is connected to the correct input?
Before instal junsun navi, my rear camera worked perfect with my old Medianav OEM. I respected cables configuration and camera dont work. I think that is not compatibile with junsun. What is your oppinion?
I think you should check power supply of your camera with a multimeter and check if you connected the camera the camera input and not accidentally to the RCA harness.
Nu. Cablurile sunt conectate conform fotografiei.
Not. The cables are connected according to the photo.
You could try to change video format in factory settings (code 8878, section Others). There should be the possibly to switch from/to PAL, NTSC and maybe more.
You just need to connect B+ and ACC to the positive output, GND to the negative output of your 12V power supply.
forum.xda-developers.com
forum.xda-developers.com
Use at your own risk !!!!
As soon as there are +12 V on the reverse wire your should see the rear view camera app with a black screen (if rear view camera signal is not connected).
They told me the same thing and it's not true, I can do tethering by bt. I copy and paste from a post that I put pages back, I hope it helps you.
Today I applied the Firmware Stock update procedure. The procedure was successful and the tablet works ok. It remains to put it back in the car and see how it behaves in tests. This was possible for the two users who thank them once again: djborsi and TorstenH. I removed the tablet from the car and made the connections to be able to work with a + 12V DC / 220v power supply. For those who want to power it separately from the car, I put some pictures after the procedure and a wiring diagram. I made a video with the FW update procedure. Because I noticed that the tablet heats up a lot, I mounted a 12V / DC fan, It has the size 70X70mm. and thickness 15 mm. It was from an old CPU cooler. It is fastened at the back with 4 screws as seen in the photo. I put a 40 Ohm series resistor. to reduce speed and noise. I hope that what I posted here will bring a little help to those interested.
