yashsingh1/xdaforums huggingface dataset:
[Android Head-Units] fischi_viech:
Hello,

I have this headunit in the variant S5:

https://a.aliexpress.com/_mNPpRPg

It is working fine, but after turning it on the first time the screen went black after five to ten minutes. After turning it off for seconds and turning it back on the screen works fine for a few seconds but then it turns black again.

The radiator on the back is connected to power so heat shouldn't a problem. When the screen is turned black audio is still working fine and all the my steering wheel controls are working.

Also the touchscreen is working as well as the buttons on the left side of the display.

After using it for a few rides (3*20ish km) the sreen turned white 5 minutes after it turned black. Then again it turned black but had some weird grey stripes. These stripes were also visible even after a car stop, whilst i was seeing the home screen.

Is this a already known issue or did a catch a faulty device?

The seller was sending me this link after i contacted him about the problem:

The system firmware link： https://jitu2fixgreenscreen.oss-eu-central-1.aliyuncs.com/update.zip

A video showing my problem:

https://xdaforums.com/data/video/4476/4476477-b83abe3fe9154cebf7ba5eb811c57ec2.mp4
[Android Head-Units] marioti:
it is knowing issue with MCU QF03. This software from your seller do not work (it was also checked), but ofcourse you can try (don't loose anything, i guess).

Try to one thing, disconnect harness with external sim card slot. If you use this all harness just put out a single pins from connector. Some people report, this help for black screen.
[Android Head-Units] ashrambo:
I have read all post but I don´t see the menu option to change the radio settings, I can only change the region. I have a amp but I have bad signal reception. I know other radio cars as junsun and these have this option in the hidden menu.
[Android Head-Units] fischi_viech:
So did i understand it right that i should unplug the harness where the sim card slot is attached to?

Is this a hardware or software problem?

Becuase it is a hardware problem only some modules have i will try to get a replacement by the seller because i would need the sim card slot.
[Android Head-Units] marioti:
There's no more settings. Junsun, Teyes, Mekede, etc, there are FYT based units, different world :)

What car you have, and what "amp" do you use for the radio signal
[Android Head-Units] marioti:
Yes, you got it right.

We don't know is it hardware or software. IMO it is hardware because all QF03 got this problem, and erlier QF001 don't. also IMO it can be solved by software, but they don't know how yet
[Android Head-Units] fischi_viech:
is it possible for me to downgrade to QF001 or upgrade to QF004 and get rid of the prolem?
[Android Head-Units] marioti:
So far, there is no QF004. You can try to downgrade but people report some issue with sound, after this
[Android Head-Units] fischi_viech:
so just unplug the harness and see if the error is gone?

and if i wanna use the sd card anyway just connect the slot to the single pins and not use the harness?

Is it known if there will be a QF004?
[Android Head-Units] ashrambo:
My friend and me bought 2 S3 radio cars in Ossuret store, and we have two differents firmwares....What happens?
[Android Head-Units] inscriber:
Cut red wire from sim card slot. This is only solution for now about black and white screen. When they repair it you have to soldering red wire again.
[Android Head-Units] fischi_viech:
so i can't use the 4G ... and i don't think this device will support e-sim
[Android Head-Units] marioti:
nope
[Android Head-Units] marioti:
so one of you have older soft, than the other.

Go there and take first link. It is written 0614, but when you make upgrade it'll be 0712. It suppose to be more stable as the newest 0819

https://autofather.com/s_sjjc
[Android Head-Units] marioti:
It's not he harness is the issue itself, but some kind of conflict between sim card slot, and the soft /or hardware

I think, it have to be some QF004 in a future. but it mean some changes in hardware, and issues with backward compatibility
[Android Head-Units] senzatiOn-:
You have suport and direct chat with seller.

What did he say?

I'm also have this problem with black/white screen sometimes.. and only car lights is on.
[Android Head-Units] Astralech:
Our units do not provide voltage to power the antenna amplifier along the signal wire. If you want the amplifier to work, you must supply 12V to it.
[Android Head-Units] brzanek:
Hi,

Tell me how can I turn down the radio more than the volume? Even when it's on 1, the music on spotify is still loud. One more thing, how to properly set the equalizer in the latest version of the software where there are only 2 windows with the equalizer?
[Android Head-Units] marioti:
Settings > factory > 8888 >

There is an option where you can low the global volume to max -15dB

Also you can set all bands lower in equalizer
[Android Head-Units] fischi_viech:
The seller said i should update de software (previous post at page 185) and remove the sim card, he also wanted me to provide him with a log file. He said he would contact a technician, but after i found the solution here i told him that and asked him for a replacement with older software or a partial refund. Still waiting for a response
[Android Head-Units] fischi_viech:
I have a few questions regarding the Software/User Experience

1) I'm not able to install Disney+ to my S5, it says my device would not support this app. Netflix and Prime Video does work fine.

Is the only way out a apk?

2) I have a mode button on my steering wheel. Can i change which apps are opened/gobe through with this button. So it usually goes like FM->Local Music->Videos->Bluetooth but i wanna change it to FM-Spotify-Soundcloud-Bluetooth

3) on some layouts, you can open maps above the car-speed dash. How can i close maps and go back to the speed dash?
[Android Head-Units] Aaantonn:
Don't listen to this nonsense about the MCU! I have exactly the same version, upgraded from 01, the seller himself told me and told me how to do it! Everything works well and there are absolutely no problems related to the MCU! I will tell you more that as I understand it, absolutely all new devices work on version 03, and version 01 is no longer supported! The seller himself explained to me that version 03 is an updated version 01. I will tell you that 100% you need to look for a solution to the problem only with the seller! For example, in my case, the seller directly solves problems with the manufacturer and gives me answers the next day. In the same group, since the appearance of version 03, they say that it cannot be installed on 01, they say the board is not the same... In fact, it is very easy to install and the board is the same!

I write rudely on this issue, because people who write false information based on their guesses are annoying, and when you criticize them, they turn your message into spam!

NEVER REARRANGE THE MCU ONLY AT WILL! THIS CAN TURN YOUR DEVICE INTO A BRICK, THERE ARE ALREADY A COUPLE OF SUCH CASES IN THIS BRANCH! MAKE SURE 100% THAT THE MCU SUITS YOU, ASK THE SELLER AGAIN, THEN CHANGE IT! IF YOUR DEVICE WORKS PROPERLY, YOU DON'T NEED TO CHANGE THE MCU, JUST THE FIRMWARE!

Look for the answer from the seller!
[Android Head-Units] marioti:
fischi_viech have native qf03 unit, so as I said him before, it is possible to downgrade, but some people report the sound is better on native qf03. For example https://xdaforums.com/t/firmware-qf...62a-7862s-not-fyt-based.4541261/post-88852645

And how are your experiance with upgrade native qf01 to qf03, any noticible changes?

I just thinking to do it in my hu
[Android Head-Units] fischi_viech:
i have a update from the seller.

He only wants to refund me 8USD, i try to get as much out of it as possible. If he isn't willing to give me more then 20USD i will contact AliExpress and get to a solution with them
[Android Head-Units] Hujeros:
in my opinion, "replace the screen" means replacing the entire unit and not just the display
[Android Head-Units] ashrambo:
Are you sure? I connected to G8 pin, I thought it is a +12v output
[Android Head-Units] Elrathias:
Screen is cheap, as is the navigator board. the bulky things makes the unit expensive - frame, cabling etc.

https://www.aliexpress.com/item/1005004126700613.html?algo_exp_id=33a547a8-bcd9-4a4a-bfcc-9ebd6d1f3a21-0
[Android Head-Units] Elrathias:
Blue/white socket cable to blue harness cable sends +12v to amplifier. on first gen 01 unit its also shared by the cooling fan, via a double cable crimp in the pin for the small connector.
[Android Head-Units] fischi_viech:
Yes but replacing the screen does not solve the problem of the unit
[Android Head-Units] Elrathias:
True. My biggest issue is that you only get FR FL rca out, and then only ground referenced signals. so im running the unit at -15 and with lowered eq into my built in car amp. this causes alot of signal distortions to creep into the signals, since the ~450-500mV signals get amped up to max pretty quickly.
[Android Head-Units] Aaantonn:
No, I don't see any noticeable changes, I had problems with the fact that sometimes the radio didn't turn on, and I had to remove the battery terminal to restart it. I was afraid to press the reset button, so as not to erase all the data. The seller threw me this version of the MCU and told me to install it. There are no problems yet. The only thing I noticed is that on 1 the music is playing very quietly, and on 2 it is sharply loud, but perhaps this is a firmware problem, since I also replaced it. The sound is exactly the same as on 01, this is not true.
[Android Head-Units] senzatiOn-:
If your don't know how to give logs .. I can help you.

The logs write errors of system and software developer can fix it.

Will be good idea to send logs to his technician. Maybe this can help.
[Android Head-Units] ashrambo:
Seller sent me this photo. But this afternoon I will check the voltage.
[Android Head-Units] Lione2:
Updated from QF01 to QF03 on S5 unit, no issues so far..
[Android Head-Units] marioti:
First of all this black box on antenna cable is a separator, and not amlifier. it separate the power supply to give it only on the antenna but no reverse to the plug and to the unit.

This specific separator (in the photo) is a rubbish. I had it and it stop working after ca. a month. inside is only simple pcb with 2 or 3 resistors and 2 capacitors. But it should have also a choke coil. Anyway, Power supply in pin G8 don't have stable +12, but everything what give yous alternator. So it have between 12-14,6V, but it is ok for supply the active antennas (like they are, in all VW group cars)
[Android Head-Units] Dezik:
Hi, I've got some serious issues with screen on my S5.

Day before yesterday the touchscreen was not working. Today I got in my car and whole screen is black. Audio is working, I can hear the radio, the buttons works too, but the whole screen is black. Can't see anything even the rear camera.
[Android Head-Units] marioti:
Have you read any posts above?

If you have QF003, then just disconnect sim card slot, mean whole cable,
[Android Head-Units] Astralech:
I meant that there is no 12V on the antenna socket like in a car radio. I also have a 12V from the G8 through filters removed from the car radio connected to the signal wire in the antenna cable plug.

I have the antenna on the rear window and I am satisfied with the FM reception, if I had the antenna on the roof, I think it would be very good.
[Android Head-Units] Couchment:
Just joined the club with the S8 unit from Car_Navi GPS Store for my VW B6 Passat. Love how it looks in the dash and I haven't had near the issues that I've read about others having. Its got a few quirks as expected, namely

Key on/off doesn't change the standby state of the unit requiring me to hold the power button when I shut the car off and get out

Bluetooth doesn't autoconnect to my phone when the unit resumes from standby

Youtube Music Revanced doesn't attach to the music widget in the launcher

Scaling/DPI could use a bump upward and I haven't seen an option for it

Haven't gotten to test the radio or camera functionality yet but for the most part it runs smooth as butter. Installed it last night and it idled at 52-60c with the fan running the entire time. Today it's been under 48c running GPS and music with the fan disabled. Curious what firmwares I can flash to it without issue as I'm still reading the thread and haven't figured out what the difference between QF001 and QF003 is.

Here are the firmware links the seller sent me

Oh an has anyone seen a screen protector that fits? I do a lot of metal fab and shavings get everywhere. My screen measures out to 3 13/16" x 6 3/4"
[Android Head-Units] Barykelo:
MCU you have the current, latest firmware here https://jitu2fixgreenscreen.oss-eu-central-1.aliyuncs.com/update.zip
[Android Head-Units] refsada:
There is no third-party launcher with PIP navigation, Google does not allow it.
[Android Head-Units] marioti:
Key on/off - thats not normal i have Superb II, and it woks fine. When I off the car and put out the key, it goes to standby for 2 hour (I set it like that), after that time it goes off

Screen protector - i have matt screen protector, but im not happy for it, but there is also a glossy one. Depends what country you are from, maybe just look for a Teyes cc3 screen protector (but not cc3 2k) it is more common unit but the screen is identically
[Android Head-Units] elpardua:
Do you lose time settings when turning off your car? If thats the case, check your pinout, VAG group made its own version of the ISO pinout and constant 12v and switched 12v are switched over. Also make sure that the pin from the K line is disconnected, because it will lock your diagnosis line if you run a scanner like Vag-com or similar.
[Android Head-Units] marioti:
which pin is K-line in canbus
[Android Head-Units] elpardua:
My bad, i have an A4 B5, in B6 platform they migrated from iso K-Line to canbus. Check this diagram, make sure CAN labeled pin is not connected to stereo harness, that line should go to a CAN box instead i think.
[Android Head-Units] elpardua:
Someone else is having problems with the touchpad auto illumination sometimes working and sometimes don't? Looks like a software bug.
[Android Head-Units] XxXDarknessXxX:
How do I know if my uni FYT based or not? I have a "Srunbi T10" unit. CPU-Z crashes upon start, but other apps seem fine. Is there another app to validate the other chips? Nevermind i found the DeviceInfoHW app. The manufacturer claims that the AMP IC is the TDA7851 which seems like an okay one based on reports.

I have the UIS7862A chip, I found this specification about it: https://gadgetversus.com/processor/unisoc-uis7862a-specs/

I'm still figuring out the basic functions of the unit, but the amp seems to be pretty bad. Is there a way around this? Maybe using another cheap device to drive the speakers with the optical output and somehow bypass the board? Or do you guys have any recommendation about how to enhance sound?
[Android Head-Units] Dezik:
DIsconnected all the plugs and still not working. Seller also wanted me to measure the voltage on LED pins

I measured and there's no voltage. I have PCB version LXH-QF001-UIS7862S-V01/20220621.
[Android Head-Units] MauriBixio:
That 2-pin connector should be the backlighting of the display (LED).

If you have no voltage here, maybe the line that controls the backlight is blown, and you'll have a black display, if so.
[Android Head-Units] Dezik:
That's what I thought too. All that's left is to wait for the seller's response.
[Android Head-Units] Dezik:
I was checking the motherboard and I found out that the marked inductor is shorted to the GND. I found out also that PCB is curved 😅
[Android Head-Units] MauriBixio:
Usually an inductor that is part of a switching power line is in series and not shorted in parallel to GND, but we don't have wiring diagrams of this MB, so we can't be sure whether it's an assembly problem or not.

The curved PCB is not normal, unscrew that hold it and check under it what happens...
[Android Head-Units] Couchment:
Is this for me?

Is that what that setting is for? I had it set for 2 hours and when I got back to it in the morning the screen was on. I switched it to 7 days. I'm US and that teyes screen protector is not made for it. Attached picture is what mine looks like installed. Having physical buttons was a requirement.

Nope but it does seem like constant and switched are backwards. I'll check it out when my antenna adapter comes in today and I get back in there. Like you said when VAG switched to CANBUS they got rid of the k-line/dimmer switch nonsense. I've got a mk3 jetta with that issue. Whats fun with those is the dimmer actually works but you can't get diag from it cause it's shorted to ground.
[Android Head-Units] Dezik:
I've checked curvature of the motherboard. It is caused by 3 pin socket that goes to toslink emmiter. The socket was leaning against the case lifting the motherboard. I've putted 2mm distance between and MB. Works well i think...
[Android Head-Units] Lione2:
Can you confirm this bug from your unit with android auto ? https://issuetracker.google.com/issues/296780667?pli=1
[Android Head-Units] Astralech:
I also sanded the housing so that this socket would not block. And as for the LED backlight, the driver next to this coil is probably damaged.
[Android Head-Units] Dezik:
Could you decode what the driver's name is? Tommorow I will check all the capacitors and diodes in this circiut. Capacitors often fails in backlight circuits. Maybe seller will help with broken circuit, I wrote to the seller bout driver.
[Android Head-Units] Aaantonn:
On the Passat b6, there are no wires to change, everything works as it is. Except for climate control. To turn off the radio from the key on the wiring, disconnect the plugs with two wires red and orange.

Who knows how to connect the air conditioner to the radio on a Volkswagen, please tell me !?
[Android Head-Units] Couchment:
My climate controls are separate and I thought the climatronic units were too. Are you sure it's a B6? What year is your car or did you buy a unit that replaces the climate controls too?

Look at the attachment of my most recent previous post and you'll see what I mean.
[Android Head-Units] IamPickleRick:
Hi! Has anyone found a solution to the 4G issue? I want to buy a HU, but 4G is very important to me, and it seems that this problem has been ongoing for months, and they might not even fix it anymore. Is there a type/model that is more reliable than these S5/S8/HIZPO/UIS7862s series? I've been reading about quite a few issues with these models. I've also come across some cheaper options with similar specifications but different CPUs. I'm not sure if those have more problems. Does anyone here have experience with different types/models?
[Android Head-Units] MauriBixio:
If AC doesn't work by radio and its canbus interface, it means it's not supported and you can't have it.

Even with BMW cars this happens, AC via radio does not work.
[Android Head-Units] j3room3:
I can confirm this bug.

To fix it I have to open the radio app and then return to zlink app.

Very annoying !

Edit : Bad news it's zlink related and google will do nothing about it because it's pirated :(
[Android Head-Units] kwiedo72:
Agama car launcher, works perfectly. Full screen navigation or small picture that you can place anywhere you wont on your screen
[Android Head-Units] Lione2:
Good find, until now i rebooted entirely the hu

If everybody Can, report this bug to seller, so he can report to manufacturer.

There is hope because seller seems to update zlink too. I update to 1808 firmware and zlink was updated to 5.4.3 in place or 5.3.XX
[Android Head-Units] Astralech:
I bought the S7 in January, I currently have the system QF001.230714 and the MCU QF01.230207 and I have no problem with 4G. I don't know what happened with the recent MCU QF03 updates or with the new HUs that there are any problems. I checked and corrected each element of the kit before assembly.
[Android Head-Units] Aaantonn:
I have a 2008 car, but the climate control is not the same as in your photo, I have a full two-way climate control with a different panel. I saw a video on YouTube where such an android was installed in Passat b6, but from another manufacturer and the climate control itself was activated on the radio.So it's possible, but the reason why it doesn't connect is unknown, maybe the canbus is not the same, maybe something else.

Did you manage to disconnect the two wires responsible for turning on the radio from the ignition key? According to your first post, I realized that this is the problem?
[Android Head-Units] Couchment:
Oh you just want this as a second option? Probably possible but my advice is to not muck around with it. Do you have a link to the video I'll check it out.

I am in the process of solving the issue. The factory radio harness doesn't always have an acc wire instead sending a pulse signal to the radio to tell it to shut down when the key is out. The wire in that position is hot all the time just like the B+ wire.The formal solution to this is a special decoder box. I'm just running a wire from the lighter socket fuse to the acc power on the harness.

You give me a thought, I wonder if the canbus decoder box is working for the switched power but being overridden by the constant signal. I haven't actually cut anything yet so I'll give it a try.
[Android Head-Units] Aaantonn:
The wire to be disconnected is in the wire bundle from the new radio. The salesperson should have told you. Nothing needs to be redone.

2.42 minute
[Android Head-Units] Couchment:
That was it, found the connector on the harness. I was gonna run another wire anyway and had to route the backup camera cable and mic though there so I won't consider it a waste of time.

As far as that video goes I'm not even sure what car that is and I don't see the climate controls being operated. I doubt that's supported on our cars.

For some reason I was seeing a completely different video when I was looking on my phone. Weird but I got it.
[Android Head-Units] Aaantonn:
The video I sent you shows which wire to disconnect. Here is the second video with Passat b7, exactly the same wiring as mine. See 12.09 minute. Look in Google and you will see that people have climate control on Passat b6 from the radio. Passat B6 and B7 are identical, only they can be of different configurations.
[Android Head-Units] Couchment:
He's got a different CANBUS decoder than I have. VW-RZ-08 from what I can tell in the video. Is yours the same? I imagine these things aren't all equivalent.
[Android Head-Units] dakong1025:
I am a buyer of ROCO K706.

The built-in launchers are all similar and the maps (navigation) are small.

The device is good, but the launcher is bad so it's useless.

Please make a launcher that displays a large map (navigation).
[Android Head-Units] lontrish:
Hi, I also have this problem with the S8 and there's no 4G for me. I've been asking them but they haven't told me anything yet. Still waiting to hear back from them but hopefully there's a way to resolve it since I bought a SIM just for the car. I only get Edge for the most parts.
[Android Head-Units] fischi_viech:
I have a few questions regarding the Software/User Experience

Does anyone know the answer to one of them?

1) I'm not able to install Disney+ to my S5, it says my device would not support this app. Netflix and Prime Video does work fine.

Is the only way out a apk?

2) I have a mode button on my steering wheel. Can i change which apps are opened/gobe through with this button. So it usually goes like FM->Local Music->Videos->Bluetooth but i wanna change it to FM-Spotify-Soundcloud-Bluetooth

3) on some layouts, you can open maps above the car-speed dash. How can i close maps and go back to the speed dash?
[Android Head-Units] ashrambo:
But I think this man has a Junsun radio, it is different to our model... His radio shows the drawing of the car with the parking assist sensors when he uses the rear camera.
[Android Head-Units] marioti:
For vw group our hu show it too
[Android Head-Units] Aaantonn:
There are different parking sensors blocks. Change the main block and it will show.