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

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TorstenH

Senior Member
Feb 20, 2021
819
196
Can you elaborate on how to get Logcat Watcher to just show just what I'd need? There's a lot flying by, too fast to see anything useful. I searched for "MainUI" but nothing came up, and I see there's filters but I wouldn't know what to filter on.
1. Create a filter with tag MainUI
2. Press SWC button voice button
3. Search for nDealPkey

Please note:
- Pressing the (illuminated) touch buttons on the left side of the device (home, back, volume) may create nDealPkey entries. So don't get confused.
- You can clear the log before pressing SWC button to reduce the number of log entries. And you can pause after you pushed the SWC button.
- You could try other search terms like key.
 

kaanarli

Member
Jul 25, 2022
22
4
A couple of thoughts

- (1) shows you downloaded the file 2x (first one without (1) and 2nd one with (1)). Maybe updater can't accept space or '(' ')' in file name? Maybe try the original download without (1).

- How is your USB drive formatted? If format with macOS, I've always had to choose to format ExFAT (I use 64GB USB3 stick formatted as ExFAT for my HU firmware upgrades). FAT format doesn't work well for most usage. FAT32 doesn't exist on macOS format utilities

Hi
I finally successfully updated my YT7260L HU to Android 10 with 1.72FW version. I am using Windows PC by the way, and I was able to update by using the 2nd USB port directly came from back of the HU. Firstly I was trying car's own USB port but was not working. You may see the photos below. API version also update to 29. MCU is still 0.7, is there any necessity to update it or how may i update it?

Default UI and DSP settings UI also changed.

1659506757856.png


1659506825032.png


1659506848987.png


I have another question regarding the ZLINK. When I checked the ZLINK, I noticed that its not activated and when I try to activate it, I got the error code below. Do you have guys any idea how to activate it?

Thanks.

1659506940644.png


1659506959262.png
 

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Toky745

Member
Jan 20, 2022
32
5
My rear camera started having screen issues, has anybody encountered such problem? I want to find out if it is problem of camera or probem of headu unit. this happened even before update to 1.73.3, so it is not software issue.
Just came to conclusion that this broken rear camera screen is due to usage of agama car launcher and it is only from latest update of agama i think
 
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howardc64

Senior Member
Apr 30, 2016
215
52
Just came to conclusion that this broken rear camera screen is due to usage of agama car launcher and it is only from latest update of agama i think

This seems quite unlikely but of course you have the behavior in hand :)

As far as I know, backup camera processing has its own HW subsystem. I think of it as 2 computer systems inside the HU. One for cameras, the other for everything else. This is why backup cam can come up so fast, if it had to wait for the main CPU to respond... it can lag if overloaded. So backup cam runs as soon as you put in reverse (or like 1s after) as long as the HU is booted up.

Agama also have no deep hardware integration nor does it have any backup camera features

I sometimes see a momentary (<1s) color glitch on mine around 15-20 rows of pixels in center of screen during reverse. Looks like color processing messed up ever so briefly. Maybe related to specific image when I backout of garage, not sure. Very brief and small, wife (her car) probably would say never seen it haha. Your backup cam image noise is all vertical. I suspect its hardware (most likely camera?) If you have a composite video output source (say a VCR or old video cam) you can substitute that for rear cam and see if same (adjust video format accordingly)
 

TorstenH

Senior Member
Feb 20, 2021
819
196
Camera works fine with factory launcher
Don't think it's the presence of Agama but the absence of the standard launcher. May be interesting to know if it works with another 3rd party launcher.
Just strange because you're not the only one using Agama or another launcher. I have a Junsun V1 pro (AC 8257 device) and camera working fine even I'm using Agama, too.
 

Gerer142

Member
Jul 25, 2022
5
0
I'm here again and this time with huge uptade: The mic problems are finally gone!

So, after the screenshot that was posted by @howardc64, I was a little bit less worried because It didn't look like it was a problem related to a software as his android head unit config was the same as mine.

Like I told previously, finally I could test my new mic SONY XA-MC10 and... it didn't make any difference, the problem where still there.

After testing 4 different external mics and the internal one, the problem was always the same: The mic sound only worked if you put the mic as closest as you could to your lips.... Whenever you separate it from your mouth, no one could hear you because it was like you were talking from the cave 😅

At this point, I was discouraged but after some random call test, I discovered that the internal mic where working fine BUT only if I spoke to a head unit from behind direction and not directly to front of it. This may sound stupid so I will give in datails to explain what was really happening to my mic input signal.


I decided to open the head unit and search for mic location behind the display:

1659726738672.jpeg

The mic was located on the PCB:
IMG20220730161649.jpg

and after inspecting the mic hole located on the front of display is where I discovered a big surprise...:

IMG20220729213142.jpg

The hole was blocked by a big rock or something like that... I don't know what kind of element it was but after removing it, the mic gain problems were gone. This would explain too why the mic was only working if I spoke to it from behind as the front was blocked....

Now people can actually hear me almost from outside of my car 🤣

Another funny thing that I discovered in this process is that the external mic is connected in parallel with the internal one so it doesn't disable the internal when the external is plugged as they work at the same time (at least that is how it works on my head unit 7260B)

If you want to use a external mic, my recommendation would be to desolder the little one located on the pcb described above and then plug the external to the output pins:

IMG20220730162703.jpg

For this process you have these two options:

1) Take a female 3.5mm jack connector and solder the ending of it to two pins.
IMG_20220805_213252.jpg

2) Cut the end of mic's jack 3.5mm connector and then solder the pins to it
IMG_20220805_213344.jpg


With the first way you can test different mics without destroying the jack connector on them.
 
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marchnz

Senior Member
Nov 26, 2012
5,105
1,083
NZ
[Another funny thing that I discovered in this process is that the external mic is connected in parallel with the internal one so it doesn't disable the internal when the external is plugged as they work at the same time (at least that is how it works on my head unit 7260B)]

You would not believe how many times this has been discussed.

Nearly all Chinese origin headunits across many factories all make this mistake - going back to Wince units,!

Sounds like you may have read through the forums and then tested the theory
 

Gerer142

Member
Jul 25, 2022
5
0
[Another funny thing that I discovered in this process is that the external mic is connected in parallel with the internal one so it doesn't disable the internal when the external is plugged as they work at the same time (at least that is how it works on my head unit 7260B)]

You would not believe how many times this has been discussed.

Nearly all Chinese origin headunits across many factories all make this mistake - going back to Wince units,!

Sounds like you may have read through the forums and then tested the theory

You are right that almost everyone says that If you want to connect a external mic then you need to desolder the internal one but I thought this was because their head units didn't had a exteral connector for plug in or pinouts to connecting it so you would need to soldering it directly to the PCB... I guess I missed the part where you describe that it is because the mics are parallel connected
 
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    Update on 10/28/22 1.73.7's low audio volume. In this release, xyauto requires much higher volume # for audio output compared to the past. However, Bt call volume level seems same as before. See attached diagram for reference. Therefore, it seems this release has gain on path A reduced significantly. This causes the following problems

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