AC8257 CPU Based unit's problems & questions - Couldn't find any info about it

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howardc64

Senior Member
Apr 30, 2016
424
113
karlisakis said:
Update on the ZLink issue.
Updating to ZLink 5 did not solve the issue.

I assume I need to reflash the OS.
I tried to load an older version, but it does not allow me to downgrade via usb flash drive.

My biggest issues now are the constant connection drop when using ZLink (it plays music via bluetooth just fine)
And the high pitch static/cpu/something sound via speakers - this one is hella annoying when there is no music, and I have not been able to find the culprit.

The static is there only when the unit tries to play music or any sound, when the amp turns off, no static.
It's clearly a cpu related, as it gets more active when the unit is trying to open an app, or play a video, its less pronounced when just idling.
Click to expand...
Click to collapse

Sounds like EMI issues (seems common on this HU). Don't know why firmware version would make a difference.

YT5760B_AC8259 - Sound

Musc & Call Volumes There are 3 possible ways to make/receive calls BT calls to linked phones without CarPlay/AndroidAuto (CP/AA) Use Settings->Volume to set call volume and music volume independently. Usually call volumes are set much louder than music due to the narrow frequency range of calls
sites.google.com sites.google.com

YT5760B_AC8259 - Network

WiFi WiFi is faster with Bt turned off (confirmed on my unit) Someone on 4pda also reports faster wifi with longer antenna GU on MTK AC8257 cpu, Android 10, MCU: HDBEC - 4PDA Cellular HU includes 2 cellular SIM card slots. One internal (SIM1 require disassembly to get to it) and one via external
sites.google.com sites.google.com

I believe wireless CarPlay or Android via HU+zlink is over wifi hotspot (HU's wifi signs into phone's automatically enabled hotspot for CP/AA)

Maybe try wired connection and see if connection drops improve.
 
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G

GJAQUES

Member
Aug 23, 2016
9
0
TorstenH said:
There is a setting in Android settings called "invert colors" or similar. Try to use the search function on top of settings to find it....
Click to expand...
Click to collapse
Hello, I have a Multimidia yt5760b AC8259 4gb ram 64gb internal memory.
I managed to solve the touch issues (just put the 5 fingers on the screen and keep turning your hand from one side to the other, then the configuration screen will open, then just follow the steps by clicking on the points), I also solved the issue of images, it was a wire of the harness that was badly fitted.

But now I need help with another situation.
It no longer has the logos and animations, it is also not showing the speed and revolutions count in the multimedia, I believe that due to the update, it ended up deleting everything.
I would need these folders with the files to copy to mine.
As you can see, the colors on the screen are messed up, I've already reversed the colors in the Android settings but it's no use. If you notice in the video when it restarts in the background the colors are correct. But after reboot they are bad again.
 

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G

GJAQUES

Member
Aug 23, 2016
9
0
TorstenH said:
There is a setting in Android settings called "invert colors" or similar. Try to use the search function on top of settings to find it....
Click to expand...
Click to collapse
Hello, I have a Multimidia yt5760b AC8259 4gb ram 64gb internal memory.
I managed to solve the touch issues (just put the 5 fingers on the screen and keep turning your hand from one side to the other, then the configuration screen will open, then just follow the steps by clicking on the points), I also solved the issue of images, it was a wire of the harness that was badly fitted.

But now I need help with another situation.
It no longer has the logos and animations, it is also not showing the speed and revolutions count in the multimedia, I believe that due to the update, it ended up deleting everything.
I would need these folders with the files to copy to mine.
 
Last edited:
G

GJAQUES

Member
Aug 23, 2016
9
0
Hello, I have a Multimidia yt5760b AC8259 4gb ram 64gb internal memory.
I managed to solve the touch issues (just put the 5 fingers on the screen and keep turning your hand from one side to the other, then the configuration screen will open, then just follow the steps by clicking on the points), I also solved the issue of images, it was a wire of the harness that was badly fitted.

But now I need help with another situation.
It no longer has the logos and animations, it is also not showing the speed and revolutions count in the multimedia, I believe that due to the update, it ended up deleting everything.
I would need these folders with the files to copy to mine.
 
H

howardc64

Senior Member
Apr 30, 2016
424
113
polarfest said:
Folks,

How do you put the radio into recovery mode?

Thanks
Dan
Click to expand...
Click to collapse

Would be good if we had clear directions on this. Searching the thread for recovery seems to suggest need the autoupdate file, firmware file or image, and correct resolution drivers/UI if unit got bricked with wrong resolution UI patch.

There the search of @boolaga effort in this. Sounds like he did firmware file + autoupdate + correct resolution UI (since he bricked with wrong UI resolution install)

Search results | XDA Forums (xda-developers.com)
 
P

polarfest

Senior Member
Jun 24, 2016
58
8
howardc64 said:
Would be good if we had clear directions on this. Searching the thread for recovery seems to suggest need the autoupdate file, firmware file or image, and correct resolution drivers/UI if unit got bricked with wrong resolution UI patch.

There the search of @boolaga effort in this. Sounds like he did firmware file + autoupdate + correct resolution UI (since he bricked with wrong UI resolution install)

Search results | XDA Forums (xda-developers.com)
Click to expand...
Click to collapse
Too much black magic for my needs my friend. Ever since I updraded to 1.73.7 my YT7260B has awful washed colors and the MCU is not happy with my steering controls, can't mute, even after clearing controls and relearing many times. MCU test shows different codes for each key so the issue might be the UI.

I wanted to enter recovery to wipe cache and do a full factory reset to see if it gets better

Cheers
Dan
 
H

howardc64

Senior Member
Apr 30, 2016
424
113
2/9/23 - 11:21 1.73.8 for 2GB is out but FAILED during install.

Download 2x and tried to install 2x. Both failed with screen captures below. After failure, my UI20 background was changed so had to reinstall UI20 along with setting up radio region, DSP etc..

IMG_0135 (1).jpegIMG_0136.jpeg

Affer selecting "Reboot System Now" Nothing I did would trigger reboot. I think eventually it did reboot based on timer.
 
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polarfest

Senior Member
Jun 24, 2016
58
8
howardc64 said:
2/9/23 - 11:21 1.73.8 for 2GB is out but FAILED during install.

Download 2x and tried to install 2x. Both failed with screen captures below. After failure, my UI20 background was changed so had to reinstall UI20 along with setting up radio region, DSP etc..

View attachment 5831695View attachment 5831697

Affer selecting "Reboot System Now" Nothing I did would trigger reboot. I think eventually it did reboot based on timer.
Click to expand...
Click to collapse
I think they fired the QA team and now are rolling out these newer version without enough testing, I hope YT7260's 1.73.8 fixes my color, mute on reverse and steering wheel control issues rather than adding more issues to the pile.

Thanks for the heads up brother

Cheers
Dan
 
H

howardc64

Senior Member
Apr 30, 2016
424
113
polarfest said:
I think they fired the QA team and now are rolling out these newer version without enough testing, I hope YT7260's 1.73.8 fixes my color, mute on reverse and steering wheel control issues rather than adding more issues to the pile.

Thanks for the heads up brother

Cheers
Dan
Click to expand...
Click to collapse

There is this file which I've not been dare to try.

XYAUTO (xygala.com)

My failure could be due to using a 64GB USB stick. Windows 11 doesn't provide FAT32 format options for 64GB USB stick so my USB stick was formatted exFAT. Perhaps when the new firmware boots up and try to load more stuff, its looking for FAT/FAT32?

Anyway, I need to use like 3 USB sticks since each can only contain one firmware or apk. Need 1 for firmware, 1 for UI20, 1 for zlink 5. Perhaps just do it one at a time with a single USB stick that works.

Anyway, will try again later and report back.
 
Last edited:
P

polarfest

Senior Member
Jun 24, 2016
58
8
howardc64 said:
There is this file which I've not been dare to try.

XYAUTO (xygala.com)

My failure could be due to using a 64GB USB stick. Windows 11 doesn't provide FAT32 format options for 64GB USB stick so my USB stick was formatted exFAT. Perhaps when the new firmware boots up and try to load more stuff, its looking for FAT/FAT32?

Anyway, I need to use like 3 USB sticks since each can only contain one firmware or apk. Need 1 for firmware, 1 for UI20, 1 for zlink 5. Perhaps just do it one at a time with a single USB stick that works.

Anyway, will try again later and report back.
Click to expand...
Click to collapse
Is UI20 screen resolution specific?
 
H

howardc64

Senior Member
Apr 30, 2016
424
113
polarfest said:
Is UI20 screen resolution specific?
Click to expand...
Click to collapse

Yes

YT5760B_AC8259 - Misc

Replacing Default Launcher WARNING xyauto seems to have removed UI17 and UI20 from their file servers (3/5/2023) Probably because they were bricking too many units in the field. Read more below. Note xyauto launchers is resolution specific so be sure to research and locate the right one. Wrong will
sites.google.com sites.google.com

But maybe xyauto will eventually change without any release notes? Probably no one will try in fear of existing behavior of bricking display with wrong resolution.
 
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howardc64

Senior Member
Apr 30, 2016
424
113
Just tested 1.73.8 on 32GB FAT32 USB stick, same failure as post #1330

Reinstalled 1.73.7 (using 64GB exFAT USB stick) + UI20 to return back and avoid any mixed partial update.

So FAILURE for sure. I guess now we wait until xyauto change the time stamp with a fixed upload on their server.
 
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howardc64

Senior Member
Apr 30, 2016
424
113
1.73.8 2/11/23 11:04 is out. Comes with an upgrade flowchart. Google translate to English version is attached. Looks like can't downgrade after via USB (just a guess based on translation)

Tried it and FAILED again in the same way. Perhaps 1.73.8 requires a different upgrade process than the past? Return back to 1.73.7 by just reboot and reinstall UI20 so I guess failed install likely didn't corrupt the 1.73.7 OS.

IMG_0145.jpeg
 

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hyz_123

Member
Feb 25, 2022
25
18
howardc64 said:
1.73.8 2/11/23 11:04 is out. Comes with an upgrade flowchart. Google translate to English version is attached. Looks like can't downgrade after via USB (just a guess based on translation)

Tried it and FAILED again in the same way. Perhaps 1.73.8 requires a different upgrade process than the past? Return back to 1.73.7 by just reboot and reinstall UI20 so I guess failed install likely didn't corrupt the 1.73.7 OS.

View attachment 5833551
Click to expand...
Click to collapse
Looks like we have to upgrade (Should say brand new install) via PC only.
 
H

howardc64

Senior Member
Apr 30, 2016
424
113
hyz_123 said:
Looks like we have to upgrade (Should say brand new install) via PC only.
Click to expand...
Click to collapse

Probably also need to think about license info like zlink. I've saved by zlink activation code but have never had to use it. It would always activate offline first and then online after launching a couple of times with wifi connected.
 
U

usmcsas

Member
Aug 8, 2012
26
3
Hi mates, I have Xy Auto 5760B and my software version is 1.73.7. (vertical-tesla) I see new version came out. Did anyone complete it successfully?
 
A

asas95140

New member
Feb 13, 2023
4
0
Hi,

I am looking for the test point of this motherboard (yt5760, AC8257HV), I searched on google and did not find, thank you for your help
PXL_20230213_171009258.jpg
PXL_20230213_171130130.jpg
 
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    H
    howardc64
    kan_ranga said:
    Referring to the DMs we exchanged, Honestly i did not notice any performance difference after i flashed 1.73.8. Also could be that i did not spend too much time before i reverted. I am happy to try again and revert back. I should have tried google maps though (which i did not). Cos that is the only thing that is slow for me in addition to Wifi which i hotspot from my phone.
    Click to expand...
    Click to collapse

    Googlemaps is slow on this HU so no way to solve this

    kan_ranga said:
    Couple things that are still open for me to understand is
    1. What files causes the bootloop when i flash 5760 on 7260. It is proven now that boot, vendor and system are not the culprits. I also used metazone and the subsequent files from 7260 stock and that bootlooped. So i suspect files before metazone (excluding boot, vendor and system) is creating the problem. I even got dtbo from stock and that bootlooped. Any views?
    Click to expand...
    Click to collapse

    No idea. I don't really know what all these different partition images are for

    kan_ranga said:
    2. I currently dont use a SIM card and I suspect the device did not come with a SIM feature - cos i dont see a phone app on stock. However when i flashed 5760 (the above method), i could see a messages and phone app integrated. I also keep getting a message that the IMEI is blank. Any fix for getting rid of this pop-up as i dont intend to use a SIM card and instead hotspot the device with my phone
    Click to expand...
    Click to collapse

    If you don't want to remove HU and see the IMEI sticker on logic board. You can patch it with any dummy IMEI # and it will stop complaining.

    kan_ranga said:
    3. I also was reading on the russian forum that 1.73.8 gives you an option to choose which DSP version you want to apply. However i could not find that after the flash. Any help there?
    Click to expand...
    Click to collapse

    Sorry, I have no knowledge here.
    View
    1
    H
    howardc64
    Updated to 5/3/23 2-4GB 1.73.8

    Not much visible changes. zlink is now zlink5

    NOTE for those on 1.73.7, its not possible to upgrade via System Info Android upgrade button. Require computer flash upgrade to 1.73.8's new partition table.

    Screenshot_20230503-172735.pngScreenshot_20230503-172753.png

    Prior Installation Failed to Boot

    My prior firmware (6-8GB 64b firmware on 2GB HU) died and wouldn't boot Android (Get Car Audio logo but no Android logo). Had TWRP installed so always failed Android boot and booted into TWRP instead. TWRP showed the Android file system was present so don't know the reason for the Android boot failure. Don't know if related to running 64b on 2GB HU.

    Computer Flashing Missing Files

    5/3/23 2-4GB 1.73.8 computer upgrade file was missing preloader* and metazone. preloader is in the ota file as usual. However, had to go back to 11/18/22 2-4G computer file to get metazone (now extracted and archived on mega)

    YT5760B_AC8259 - Brick Recovery

    Firmware Format and Installation Diagrams Here...
    sites.google.com sites.google.com
    View
    1
    H
    howardc64
    jaimesilva said:
    I found that solution in this post #1325:

    Anyway I found the solution to the problem, both knobs were inverted. In Factory Settings is a section called "Encoder Settings" where you can change knobs behaviour (actually they are encoders). All I have to do was change settings in both from "positive direction" to "negative direction" and now they work as I want: on the left one clockwise rotation increases volume, counterclockwise decreases volume and on the right one clockwise moves tuner up and counterclockwise moves tuner down.
    Click to expand...
    Click to collapse

    Great, updated the computer flash guide ( post #1399 ) and website to note these potential UI issues + fixes :)

    YT5760B_AC8259 - Brick Recovery

    Firmware Format and Installation Diagrams Here...
    sites.google.com sites.google.com
    View
    1
    H
    howardc64
    donskie0five said:
    Yes I already took a photo of IMEI. I think that's my problem I format using that option and erase some of the important files with in the HU. In manual format there is an option for EMMC (Boot1,Boot2, USER). May I will find some fix for it. or if anyone can extract there files so that I can use to try to write memory back like in this video :

    Click to expand...
    Click to collapse

    @2:15 in the video, his thumb is over the 2x DDR memory. Its under the shield in your HU.

    I recently researched a dead eMMC for HiSense Android TV. eMMC is not simple flash chip. It has many features
    • Handles NAND Flash wear leveling
    • Provide multiple partitions (boot/user)
    • Access security to boot
    • Has CPU inside
    Here is eMMC spec by JEDEC (memory standards group. Need to make free account to access)

    eMMC4.5 (jedec.org)

    I'm not certain of the following but after studying HiSense TV Android eMMC, I think the following is boot process for all Android with boot code stored in eMMC
    • main SOC request code from specific eMMC location (boot1?)
    • boot1 code (maybe also boot2? I don't know) start running basic system (not yet HU firmware)
    • basic system has more sophisticated communication capabilities to/from USB/PC to flash remainder of the firmware
    • I think boot1 code can be secured
    When we do format all and flash computer pkg firmware. I think we are not touching boot1 at all. If boot1 is lost, I think typical computer flashing process doesn't work (HU has no basic system to talk to PC). Need to first get the correct boot1 (has to match the HW) using the memory writing solution outlined in the video. So a key question is

    Where did you get the boot1? And does it match your HW?

    Since YT5760B has so many variations. Maybe there is slightly different boot1 for slightly different HW versions. Its probably desirable to get boot1 from matching HW version #s on your board.

    In HiSense TV, writing boot1 required security access and need to contact SOC manufacturer (MSTAR who is also acquired by MTK just like AutoChips). I guess this is not necessary for AutoChips from the youtube video. But it is still necessary to get correct boot1 and the flash location. I don't know any details here.

    I don't have any experience here. Just sharing some basic knowledge of Android boot process.
    View
    1
    H
    howardc64
    vipinholland said:
    Hello,

    I have bought a Android radio and it had the builtin 360 app. But it is an other app than a friend of my have on his device. It also says that I have to register on wechat but can not figuren it out how to do this.

    Is it possible to flash a different rom for this device?

    I don't think it is really Android 12 but I can not see the system info of Android because this menu is not available.

    Ram 6 gb
    Click to expand...
    Click to collapse

    You have different HU firmware than this thread. See Boison B200 under "Other AC8259HUs" tab

    YT5760B_AC8259 - HW FW

    Currently Installed Firmware Settings->System...
    sites.google.com sites.google.com

    I'm not sure how robust is the B200 forums on firmware upgrades. Its easy to brick these HUs so make sure you read and confirm clear robust B200 upgrade procedure before attempting. This forum's HU (YT5670B) has firmware released on file server by firmware developer. However, many HUs owners post firmware they received from vendor in forums.

    On 360 app on our HU, you buy HU version with this feature, then the vendor preinstall 360 app (roundadas) license. Yous says not activated so maybe you didn't purchase this feature?
    View
  • 4
    mantecon1
    mantecon1
    i did it !!! i did it !!! my radio works!! to much people with this problem and i found the solution trying bored files from xygala, i was bored, i downloaded all the files in that drive 1 by 1.. seems it’s a driver for lg screens, i will edit this to make a tutorial, but i need help to do it, my english is not so good
    View
    3
    H
    howardc64
    Late Feb release of an xyauto UI is pretty good. Has maps (I use with google maps app with offline maps), radio, HU music player, a fixed app launch icon pane (left vertical) and a user changeable app launch icon pane (lower bottom) all on one screen.

    Generally quite nice. google maps has voice input search, auto dark mode at night while navigating (none navigation mode unfortunately stays in day mode) map will be always north up while driving without navigation route.

    Screenshot_20220429-113525.pngScreenshot_20220502-172333.pngScreenshot_20220502-212853.png

    patch file link Note this seems to be for 1024x600 screen only. Didn't see it in other resolution folders.

    Mode switching is a bit mysterious (I have a steering wheel button programmed to switch modes). In the old default UI, mode switch with switch between currently running apps. Seems to do nothing on this UI while being displayed.

    This launcher provide everything I use so no need to fiddle with the HU much. Just power on the car and drive. The useful features are

    - FM radio (wife listens to this and its her car)

    - Maps always displayed and track your position smoothly (Seen other launchers with map. Position only update every second or so, very jerky display). Google maps fixed to north up unless navigating. Voice input destination via mic icon on google maps search bar. Maps always in bright color mode (quite bright at night but area is not entire screen) Navigation will auto change to dark mode at night.

    - BT works if setup to auto pair. Incoming calls pops up on screen. Can voice command out going calls with iPhone easily. Just say "siri call xxx" with iPhone mic able to hear you. iPhone looks up your contact and dials while connecting to HU's BT for speaker/mic sound.

    - Music player will play all music files in the system/USB stick.

    - Color choices are nice. Colorful but background is dim for night time use. Only issue is google maps none navigation mode display stays bright. Other nav software might handle this better.

    - Google maps generally likes portrait displays like a phone. This horizontal smaller window sometimes hide the next driving intersection change behind the green direction box on top. Not too big of a problem.

    - Left column icons are not changeable. Bottom row is user changeable.
    View
    3
    P
    piotrmocko
    I have recorder a video with the YT5760B system upgrade. It takes about 5 minutes to complete. In the attached ZIP file you can find the video.
    View
    3
    H
    hyz_123
    howardc64 said:
    You might need to reinstall 1.73.7 to recover matching zlink version. Not sure anyone who knows how to extract apks still hang out on this thread.
    Click to expand...
    Click to collapse
    I managed to extract all the apks from 1.73.7.
    Strangely. I couldn't find zlink.apk.
    There is ZlinkActivationCode.apk, which is the only apk related to zlink.

    -------------------------------------------------------------

    Update!
    Finally found the zlink apk. it was inside the vendor.new.dat.br.
    I have uploaded zlink apk here, just in case someone needs it.
    I believe this is the zlink ver 3.9.27 comes from the 1.73.7 firmware.
    I haven't got chance to test it on my HU (now is midnight here in Australia), will do it tomorrow.
    View
    3
    H
    howardc64
    piotrmocko said:
    Is it wiping user data as 1.73.3?
    Click to expand...
    Click to collapse

    Just installed 1.73.6 on 5760B 1024*600, didn't wipe user data.

    Actually, I forgot and left 1.73.3 (don't recall if it was 5/24 or 7/25 version) on the USB stick w/1.73.6 and 1.73.3 got installed which wiped my user data. But then I installed 1.73.6 over this without wiping user data.

    Biggest change I notice is just the 2x boot up pop sound is gone. So maybe xyauto have more orderly sound hardware initialization now :)
    View

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