Database Users

Android Head Unit is not recognized by PC

I have an error android head unit and have found a way on how to fix it from the other thread, "Need Help To Recover Bootlooped China Head Unit (Android 8.1 Go) AC8227L" started by Azmil2307, here on xda.
I have followed the instruction such as installing mediatek vcom driver, flashtool, male to male usb, firmware, but the problem is the PC still could not detect the head unit's USB connection. When i connected it using male to male usb, no connecting sound at all.
Do you guys know whats the possible solutions for this problem?
thanks,

mylancerex said:
I have an error android head unit and have found a way on how to fix it from the other thread, "Need Help To Recover Bootlooped China Head Unit (Android 8.1 Go) AC8227L" started by Azmil2307, here on xda.
I have followed the instruction such as installing mediatek vcom driver, flashtool, male to male usb, firmware, but the problem is the PC still could not detect the head unit's USB connection. When i connected it using male to male usb, no connecting sound at all.
Do you guys know whats the possible solutions for this problem?
thanks,
Click to expand...
Click to collapse
anyone could help?

mylancerex said:
anyone could help?
Click to expand...
Click to collapse
Hi,
I've same PB.
No detection of my head unit throught usb port from my PC.
However I can play music, transfering files and even connect a Keyboard from usb port.
The USB debug mode is enabled.
Can someone help us ?

h e l p

No connection too, no sound

Still no help..

Any news on solving this?

coffer said:
Any news on solving this?
Click to expand...
Click to collapse
I opened unit and saw where the 2 usb go but I do not have enough experience to go further :silly:
I tried to connect directly to the cable USB dvd but my pc still does not detect, dvd makes noise when connected so it's powered, but no DATA goes to the computer

Any resolution to this, i have the same issue. I also cannot get an adb connection via wifi. Any help or knowledge on why this is happening would be great.
Thanks.

Chinese AC8227L mtk - USB issue

Hi all,
I brick unit 2 days ago after bad flash with Mekede Root.img via SDCard and now unit start with black screen, I only hear the cd running 2 sec and nothing else.
Problem on this unit, I never had USB connexion with my pc or my Samsung device (on each 2 slots) when android was alive, so now it's bricked, I opened unit and I'm searching everywhere.
When I plugged USB on pc without 12v, I hear CD inside. When I start with 12V + acc, it's the same, but nothing and black screen.
I installed all drivers MTK from the web lol nothing. I tried to solder a USB cable on USB that goes to the CD in parallel (because I hear something so it's working) but no success. I have 2 pc, 2 different cable so it's not related, I tried all combinations with button / reset (10 sec, 30sec etc).
I tried this from Jacotreus here : https://forum.xda-developers.com/an...its/how-to-enter-recovery-mode-t3280247/page2 no success too, but that was obvious because no recovery ..
BTW when I plugged sdcard with .img / .upd / .bin, nothing works
Where could I watch to activate this damn USB ? is it really impossible to do something ?
If someone can help, thank you :good:
ps : I bought this unit in second hand, so I can't contact seller. it will end up in a closet so I can hack it

Hi, did you manage to connect to the head unit, I have the same problem, cannot get it to connect to the pc tried test point method still doesn't connect!

Hi no I didn't. I bought a new unit PX30 rockchip witch is not seen either by my pc... but it's working so I don't touch anymore.
My AC8227is still bricked, hope to find how to solve one day

Hi, I know how to get the unit to connect to PC but have no correct rom to flash. Do one of you guys have the rom for this unit?

hello, you can explain to me how you did it

Hello friends!
I bought an Android Head Unit MIB4 (SC9853I) for my VW Golf 7:
https://www.alibaba.com/product-det...l?spm=a2700.7724838.2017115.25.71201862OEMWlE
Everything works fine but I'm having problems with the USB ports.. the 3 usb ports charge my phone but they don't read any usb drive with music. I don't know if this is a hardware or software problem.. I've tried formatting several usb drives (4gb , 1gb, 64gb) in fat32 but none of them are read by any usb port of the headunit.
Please, help me! and thanks in advance..

PX6 / MTCE / Android 9 / Extract Stock ROM

Hi there,
I got myself the following unit on aliexpress: https://de.aliexpress.com/item/4000805871840.html?spm=a2g0s.9042311.0.0.52ef4c4dBTvhGh. It has a CHS MTCE.
When I look at factory settings, it says "A-Media Auto" as device name.
It came with zlink Carplay PCB mounted on the PCB and worked with stock rom. When I changed to mod firmwares (e.g. HAL9k or Malysk) I actually lost the CarPlay functionality. zLink just stays at "waiting", however my phone identifies the unit as CarPlay available and connects over bluetooth using the carplay connection dialog. However the "use carplay now" dialog doesn't pop up. Manufacturer says, the unit would need to be returned to factory to reprogramme. Not sure this entirely the only option.
They said they don't offer the stock rom, just updates.
A friend of mine has bought exactly the same unit, so I was wondering if I could extract the OEM stock software from there and flash onto my unit. I am not an Android expert, however already changed a couple of iPhones/Tablets OEM software e.g. to LineageOS. So, with some turoials I normally find my way around. I am ok experienced on admin level on WIN and Linux.
Not sure the OEM Android is fully rooted, but I can find out, when I have the OEM unit in my hands.
Is there a (relatively safe) process to extract the stock rom and update the modded rom HU?

See my OTG thread, extract partition by partition from your friends unit, which you mention is the same, then flash your SOM.

Thanks for replying.
My SOM has an USB port soldered to it. (See photo). Chances are, I do not even use the "wire" method to connect, but just use this port?

wupperi said:
Thanks for replying.
My SOM has an USB port soldered to it. (See photo). Chances are, I do not even use the "wire" method to connect, but just use this port?
Click to expand...
Click to collapse
PX6 board has a HDMI connector on it - do you mean that?
I am also interested in a PX6 stock Android 9 partition export image, as I recently bought a PX6 board which has Android 10 preinstalled and therefore I am currently limited to it and can´t "downgrade" to my preferred ROM Hal9k v4 beeing Android 9 based...

Junsun V1/Pro Megathread

This thread is consolidating all the information of Junsun V1 and V1Pro devices scattered in the Android Head-Units forum. I want to write and extend this to make it easier for new people. It's sometimes difficult to find the right information.
Warning: Some of these commands are altering the system. If something goes wrong you can brick your device. Be sure you know what you're doing. I'm not responsible for any damages!
General Other Threads​Junsun V1​Junsun V1 Pro​Junsun V1 Pro Firmware (8259)​Junsun V1 Pro Firmware (8227L)​Junsun V1 (8667Q)​Firmware​Updating the device firmware​Junsun V1 Pro firmware files​Root​ADB connection​Root with Magisk​Writable System​

Updating Firmware​Preparation​
USB drive formatted as FAT32
Files for update (*.bin, *.upd) need to be in the root directory of the USB drive
Starting the Update​The update should start automatically when the USB drive is plugged in. A pop-up appears that says that an update will start. After a few seconds the device will reboot and install the update.
If this doesn't work, plug in the USB stick and restart the device with a needle in the reset button. When the device starts up move one finger on the touchscreen around and wait for a green detected message at the top of the screen. The update will start.
Problem solving​I don't have a *.upd file
That is OK, the file does mot contain any information. Just create a new empty file and rename it like the *.bin file. As example, if you have a 8259.bin create a 8259.upd file.
The device doesn't recognize my USB thumb drive
There are 2 USB connectors on the back of the device. If one does not work, try the other. Make sure your thumb drive is formatted as FAT32.
Firmware Files​This list is made by taking links from different firmware threads (found in first post). Every entry has a link to the original posts. Please be careful when flashing, the files need to match the correct CPU and screen resolution. If you have files for the normal V1 or different screen resolutions you can send me a PM.
Junsun V1 Pro | 8259 | 1280 x 720:​
DownloadOriginal PostVerified8259P_军灿UI02v1280x720-国外_v20_20210907.ziphere8259P_军灿UI02v1280x720-国外_v27_20211201.ziphere8259P_军灿UI02v1280x720-国外_v31_20220225.ziphere8259P_军灿UI02v1280x720-国外11_v1_20220323.ziphere8259P_军灿UI02v1280x720-国外11_v3_20220422.ziphere8259P_军灿UI02v1280x720-国外_v44_20220920.ziphere8259P_军灿UI02v1280x720-国外_v50_20221226.zipheremopfi
Junsun V1 Pro | 8227L:​
DownloadOriginal PostVerified8227L_8军灿UI03-国外10_v7_20210814.ziphere8227L_8军灿UI03-国外10_v21_20211130.ziphere8227L_8军灿UI03-国外11_v3_20220714.ziphere
Junsun V1 | 8667Q | 720 x 1280:​
DownloadOriginal PostVerified8667Q军灿UI02-国外-VHD720x1280_v11_20211207.ziphere8667Q军灿UI02-国外-VHD720x1280_v12_20220214.ziphere8667Q军灿UI02-国外-VHD720x1280_v13_20220510.ziphere8667Q军灿UI02-国外-VHD720x1280_v23_20220801.ziphere
Factory Reset​Settings -> Car Infotainment -> About Device -> Settings Icon -> Code 8878 -> Erase all Content

ADB Connection​Preparation​
Activate Developer options. You have to click a few times on the build number until you are a developer: Settings -> System -> About Car -> Build number
Activate USB debugging. Settings -> System -> Developer options -> USB debugging
Use the 4-pin USB connection on the back of the device. Connect with a USB A <-> USB A cable. My device had a female Mini USB adapter for using a Mini USB cable.
Connect​Use adb to connect to the device
Bash:
adb shell
Problem solving​ADB can't find any devices
It could be that the ADB connection with the device is not working. This means that the corresponding option is not set. This can be done temporary or permanent.
Temporary Connection
To make the connection with adb work temporary we can change the USB setting of the device. To do that we need to set Settings -> USB Preferences -> USB controlled by -> This device. No it should be possible to connect via ADB. The connection is temporary, because after a reboot it is gone and has to be set again.​
Permanent Connection
We can enable the connection permanently by changing a value in the secret menu. Go to Settings -> About Device -> Cogwheel (top right) -> Code 8878 -> Others -> USB2 Debug -> Enable​
Can't find USB Preferences
Go to Settings and click the search icon in top right corner. Type in usb and then click USB controlled by.

Root​Create boot.img​Connect via adb to the device and find the location of the boot partition. The star '*' has to be replaced according to your device. For my Junsun V1Pro it is bootdevice. In the next step we will create a copy of the boot partition. Please be careful with dd command. It will overwrite wrong files or partitions if you do a mistake.
Bash:
adb shell
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.
ls -l /dev/block/platform/*/by-name/
dd if=/dev/block/platform/*/by-name/boot of=/sdcard/boot.img
Patch boot.img​Install Magisk apk on your device. I used Magisk v23.0 from here: https://github.com/topjohnwu/Magisk
Open the app and click on top right Install button
Then click next and choose Select and Patch File
Select your boot.img and let Magisk patch it.
Copy the new created file to your computer. The filename will be similar to magisk_patched_23000_***_boot.img
Bash:
adb pull /sdcard/magisk_patched_boot.img <older_on_your_computer>
Flash magisk_patched_boot.img​
Bash:
adb reboot bootloader
fastboot flash boot magisk_patched_boot.img
fastboot reboot
Writable System​To make the system writable we need to remount the partitions.
Bash:
adb shell
su @#zxcvbnmasdfghjklqwertyuiop1234567890,.
remount
Now we need to reconnect and then we can write to the system (i.e. copy a file)
Bash:
adb shell
cp /sdcard/myapp.apk /system/app

Reserved

Reserved

Hey all, I need help with my junsun v1 pro 4gb +64gb-mtk8259- I just had it installed and everything works except Bluetooth. I can make calls from unit and or my cell phone. Apparently the people I call can hear me but I can't hear them. On occasion as it dialing I hear the ringing for a second then it cuts out. Is this a hardware issue, install issue, or something I need to change in secret menu?? I've reached out to junsun with no luck. I fixed the issue with the swc thanks to this forum!! Hoping someone can help me. Car is chrysler 300c and phone is samsung galaxy note 20.

Cubanlink81 said:
Hey all, I need help with my junsun v1 pro 4gb +64gb-mtk8259- I just had it installed and everything works except Bluetooth. I can make calls from unit and or my cell phone. Apparently the people I call can hear me but I can't hear them. On occasion as it dialing I hear the ringing for a second then it cuts out. Is this a hardware issue, install issue, or something I need to change in secret menu?? I've reached out to junsun with no luck. I fixed the issue with the swc thanks to this forum!! Hoping someone can help me. Car is chrysler 300c and phone is samsung galaxy note 20.
Click to expand...
Click to collapse
Hi, I have the same problem, if you have found a solution to the problem please share it with me! Thanks!

I am trying to mess with the secret menu. Like bt sync type, volume, three is various options in there related to Bluetooth just don't want to screw it up worse. Hopefully someone can shed some light cuz if not I'm returning it. I'll have to pay to take it out....ughh...I love the look though, if not I would just get pioneer but it don't look stock like this

So I Brought it back to my installer and he fixed it. Apparently in my car the speaker inputs were reversed, that why I couldn't hear anyone through speakers. He told me some cars with 6 plus speakers have this problem when installing these type of units. Loving the unit now that's its all fixed.

Hello
I have Junsun V1 pro 4/64g and my unit is hanging on Google boot logo (Android 9).
Does some one know how to get to recovery to do wipe cash / do factory reset?
Thanks

I have the junsun v1 1gb, it does not enter the google play services.
I would like you to provide me with a ROOM image to update or factory reset.
Thanks!

bartekm01 said:
Does some one know how to get to recovery to do wipe cash / do factory reset?
Click to expand...
Click to collapse
I'm actually also looking for a way how to boot into the recovery. Haven't found one at the moment.
For your problem you could try and flash an update (or same version again). Description is in this thread.

Hi
Unfortunately updates are also not booting / updating while reseting. Plugging USB pendrive with update files to second USB port and against resting button still can't manage to update - radio is botting "normally" and ends up with bootloop

Try both USB ports.
Plug the drive in turn the device on and then move a finger on the touchscreen. I do a left right movement. If that doesn't work you will need to do it with the mtk tools and a scatter file.

Hi!! Are there any way to disable calls from SIM card ? Thanks

Hi, I purchased the Junsun V1 pro 6gb/128gb and am pretty happy with it. All the important things connected and worked straight away which was grand. One thing I wanted to check is the battery draining problem and the cutting of the 2 wires to prevent this. I found the Junsun diagram and on there it seems it's the red and orange wires (that "look" to run from the main black block to the black power block for the head unit). The query I have is those wires on my loom run from the canbus white block to the black power block in the head unit. Pictures attached to hopefully show this a bit better. Excuse the terminology Has anyone had any experience with this at all? TIA

Hi Everyone,
Can someone please help me how to factory reset code or the new firmware my Junsun v1 pro 9 inch 8G + 128 GB Radio chip MS98. i tried 8888 or 8878 but i can see no factory reset only factory setting.
thank you advance.

Hey does anyone know how to completey reset the AutoLink app? I tried disabling and enabling again but. Nothing works. I just want to get ride of Android auto activated from AutoLink.

Sowmaxwel said:
Hi Everyone,
Can someone please help me how to factory reset code or the new firmware my Junsun v1 pro 9 inch 8G + 128 GB Radio chip MS98. i tried 8888 or 8878 but i can see no factory reset only factory setting. View attachment 5572199
thank you advance.
Click to expand...
Click to collapse
I have the 6gb, not sure what chip. When you go into the menu after code 8878 it should say on the right in the middle "Erase All" I think. Then it asks you if you want to factory reset.

Junsun V1 Pro MTK825X pro

Hello, I have a problem with this unit updated to 2020, downloaded this firmware -8259P_ 军 灿 UI02v1280x720- 国外 11_v1_20220323- as I insert the usb the update pop up appears but at the time of restart it gives me an error, tried with usb inserted and asto rst but nothing , tried 6 different usb sticks with the same Fail result. please check usb and files.
The nibs all formatted in fat 32 as by several online videos, I don't know what to do anymore.
Usb attached 4-pole plug.
Thank you all

fixed by first updating MCU and then passing update.
I enclose MCU for those who have the same problem as me.