yashsingh1/xdaforums huggingface dataset:
[MTCD Android Head Units General] Aran:
Heej All,

I have a problem, maybe someone here has the experience and can tell me something about it. Today my car was off to the shop (damage repair, someone bumped in my car, so free of charge for me). Included in the repairs is cleaning the car, outside and inside. Then when I picked up the car this evening (nice and clean, also inside!). The head unit didn't work anymore... Screen stays black, no sound... But the led's behind the buttons do work. My guess is they cleaned with water (and maybe some cleaningfluids???) and water came in the unit, through the buttons/cd-player, but that's a guess.

Now what I am wondering, are our units that vulnareble or maybe someone has an other idea what happened? Tomorrow i will contact them and will talk with them about a sollution.

Thanks all
[MTCD Android Head Units General] Wadzio:
It is quite difficult and time-consuming in terms of logistics. But ok, they are Chinese :)
[MTCD Android Head Units General] ZeroZorro:
I have the same problem, but not someone that bumped my car. So also no fluids in there, screen just blacked out (during a firmware update). So on first sight it seems two isolated issues, but who knows. You checked the headunit after impact and before repair? Can there be some hardware connections gotten loose because of the person jamming your car?
[MTCD Android Head Units General] Aran:
Hey, thanks for the reply. The bump was really soft, just one bumper that had a little dent and needed a little fix. It was weeks ago, and only after the repairs of today the problem occured.
[MTCD Android Head Units General] RomP44:
Today I found the menu to adjust the color. I don't know if it was available before. Thanks !

For the ignition, I have contacted the seller. The stock head unit had canbus, but not this one (needed only to display text on the remote screen).
[MTCD Android Head Units General] ab1702:
Does anyone know if the firmware or the mcu of the device controls the screen brightness?

I have an ongoing dab problem that is affected by the brightness of the screen.

My device is KGL and I have updated to the new KGL mcu and firmware and have previously tried the GS firmware but i have never tried a different mcu so I was thinking of trying one of the cross compatible mcu’s.
[MTCD Android Head Units General] typos1:
What is difficult and time consuming ? Its long been noted that MTCB/C/D/E head units are made by approx 15 companies to the same basic reference design with minor variations in some components (radio tuner, BT type etc) but with interchangeable firmware.
[MTCD Android Head Units General] Wadzio:
As you wrote "....made by approx 15 companies..." "...with minor variations..."

Therefore, I think that the logistic preparation of such an update is not easy and time-consuming.

But never mind, this is not an important topic for discussion.
[MTCD Android Head Units General] janusz12561@gmail.com:
Hey

I bought a radio:

"Android 6.0.1 two DIN 7" DVD player for class E / W211 / Mercedes Benz / CL Octa cores 2 g RAM 32 g ROM 3 g / 4 g Radio Wifi GPS "

After mounting, it turned out that he did not see the pendrive (4 different) after inserting into the USB sockets. Someone had such a problem and could somehow fix it, because there is no reason to count on a guarantee from the seller "SISUDAR"?
[MTCD Android Head Units General] Acceldrag:
I have 2 questions...

1)Is there a background music player for our units?

I read all around the web about pressing home button and minimise the player but there is no such feature. The home button is a soft one. Also on the wheel if i press the home shortcut, the player stops.

2)Why google maps look so bulky in our players?

Due to screen resolution i guess...

The bars up and down of screen almost get 30-40% of the map.Not navigationable at all...
[MTCD Android Head Units General] typos1:
I am afraid that you think wrong - the SoMs are identical for ALL versions (using the same processor) from whatever manufacturer, the ROMs are therefore fully interchangeable.
[MTCD Android Head Units General] kaderekusen:
https://youtu.be/K947CRWGTaE
[MTCD Android Head Units General] aadat:
Same problem here wich one ( can Bus ) right option is for opel zafir tourer 2016....( GM simple ) or an other.., Help please
[MTCD Android Head Units General] typos1:
It depends on what CAN Bus decoder you have - choose the one listed under the manufacturer of your CAN Bus decoder.
[MTCD Android Head Units General] Acceldrag:
I don't get the connection...
[MTCD Android Head Units General] kaderekusen:
Ok maybee in this video...

Music player

https://youtu.be/guKVNhIoz7w
[MTCD Android Head Units General] aadat:
Isn't showing anywhere Opel .
[MTCD Android Head Units General] Montero7o:
NEW XTRONS TB706PL vs XTRONS TV706APL

Hello

I come back to the subject of XTRONS Android-based, especially the model XTRONS TB706PL which replaced the old XTRONS TB706APL.

Does anyone have any experience on this new model, have the following issues been fixed:

-Conflict between Wifi and Bluetooth, on the old model the wifi signal fell as soon as I used Bluetooth when receiving a call.

-Echo very present during a call to the correspondent after a few minutes.

-High temperature inside the post

-Poor screen quality no contrast with the sun.

-I can not light buttons except to light the headlights, while there is a parameter in the system menu to activate the lighting buttons permanently.

Thank you for your answers

cordially
[MTCD Android Head Units General] Bose321:
Read on their site. According to them they've added/improved the heatsink.

I doubt the other issues are fixed. You can fix the bluetooth echo with a fix.
[MTCD Android Head Units General] typos1:
Look for GM.
[MTCD Android Head Units General] jukimukikuki:
Hi,

I did not add any heat sinks, I just added the Fan in the back plate pf my HU. There was a circular hole in it. I just drilled some holes to fit 2 screws in which are holding the fan and connected the fan to any 12V line which was triggered by ACC. My HU had a remote cable, which only has 12V when the K15 is turned on, there I connected the fan. After long drives, it is still getting hot, so I am thinking of adding some heat sinks, but all performance issues are gone.
[MTCD Android Head Units General] alpha247:
I did the opposite. I added a few heat sinks around the board and performance is much better but after an hour, temperatures start to reach 110 degrees and the unit starts to slow down. so now i will attach a fan to the back. Did you put the fan inside or outside, blowing air out of the unit i'm guessing? did you solder the line or just tie it? I am not technical but will try to see if i can do it.
[MTCD Android Head Units General] jukimukikuki:
I mounted the fan inside the HU and it is blowing air out of the unit. I soldered the lines parallel to the Remote and GND line of the radio. I am using the remote line to power up my amplifier, which is why I connected it in parallel; there is no need to do that.
[MTCD Android Head Units General] apollo1976:
for the echo problem look at this THREAD:

https://xdaforums.com/android-auto/...pment/px5-solution-bluetooth-echo-v2-t3661284

The great f1x (the best developer for PX5 in my opinion) has built a fix to this problem
[MTCD Android Head Units General] alpha247:
There is a small dust filter attached to the hole, did you take that off or set the fan blowing through it? I know it's designed to prevent dust from entering the unit but i'm not sure how effective the fan will be if it's blowing on that filter.
[MTCD Android Head Units General] Bose321:
You can also try to mount a bigger fan. Which one and size do you have now?

A few heatsinks will also help alot. I think I'm going to try to mount an old Core2Quad CPU cooler, which is a fairly big heatsink with a fan on top of it, and maybe add a chasis fan aswell.
[MTCD Android Head Units General] SkyBeam2048:
If you mean the fan blow-out-hole, then remove the filter of course. There is no point having a filter on "outlet" side where you blow out the air. In fact you want to blow out the dust there, not filtering it and keeping it in the unit. Moreover such a filter at the fan will collect dust fast and block the airflow. So remove it.

Note: All "intake" filters should remain in place. My unit has all holes covered by a thin filter from the inside. This will keep the dust outside. However also here it would be recommended to clean the filter on the outside after a while when it collects lots of dust. Alternatively also remove those filters for additional airflow but be prepared for very dusty unit interior after some months of operation. This is a general issue of fans and forced airflow designs. They collect dust and dust reduces efficiency. Also a car dash is not a clean-room so it will collect dust for sure. That's also why I prefer to stay with noiseless and maintenance-free passive cooling if ever possible.
[MTCD Android Head Units General] jukimukikuki:
I did remove the filter. Last ime I checked something on the HU there was no dust inside it. How did you attached the heatsink, with heat transfering glue?
[MTCD Android Head Units General] SkyBeam2048:
Are you asking me?

My heatsink is not glued. I am using simple silicone thermal grease. The same as I use for computer systems. The Heatsink is held in place by a metal spring load which presses it down to the surface. But thermal compound might be just fine too, though a little more expensive and not reversible.
[MTCD Android Head Units General] alpha247:
I used arctic silver thermal adhesive
[MTCD Android Head Units General] typos1:
Funny all this talk of fans - some MTCB units - mainly Klyde (KLD) but also Huaglin (HLA) came with fans (that sucked out of the unit), sometime after the upgrade from dual core RK3066 to quadcore R3188 they started to remove them, the exhaust/fan mount holes where blocked (you can still see where there where on the backs of Klyde units - KLD MTCB/C and MTCD/E units use the same backplate). The power connector is still there on the motherboard, although I ve heard reports that it not powered on the latest mobos.

There are also tube type heatsinks using acetone as a cooling medium., theyre mentioned in the specific thread covering fans/heatsinks.
[MTCD Android Head Units General] alpha247:
Yea good idea. I've already installed the heat-sinks which have helped. I ordered a 12V 40mm fan which i am going to try to install on the back. But i don't know much about electronics and don't have a soldering iron or a meter. Someone on here suggested to use the GND/ACC line which seem (judging by the wiring diagram) like a cables on the outside of the unit. What have you done so far?
[MTCD Android Head Units General] SkyBeam2048:
I still believe passive heatsinks are sufficient to prevent thermal throttling in most cases. Active fans should not be required usually. Unless you live in very hot area.

Be careful about this. The ACC/AMP-CON line (blue cable) is actually a signal wire only. Meaning the head unit will put 12V on it when it's on. But the line is used to sense "device on" signal by external amplifiers usually. For example it just tells my subwoofer (or integrated amplifier) to wake up. The power for the amplifiers is usually coming from 12V BATT (direct, permanent 12V battery connection) input pins.

Some fans take fair amount of power which could actually kill your unit if your drawing too much power.

Perhaps it would be better to power the fan by ignition (12V Accessory switched input, typically RED) input from the car. This line should for sure provide sufficient power for the fan.

Don't put it on BATT (usually yellow) as your fan will stay on and drain your battery when you switch off the car.

As noted already there might be an internal connector which is unused and exactly there for this purpose. A simple multimeter should do its job to check whether the connector is powered when the unit is on.
[MTCD Android Head Units General] alpha247:
Seems like it's a lot more complicated than i first thought! In my HU, just heat-sinks aren't enough because as I've explained before, it only delays the throttling by about 30 mins. Once temperatures get above 100 degrees, after a while, it starts to slow the system down and that's when i get GPS and system UI lagging issues.
[MTCD Android Head Units General] SkyBeam2048:
It's not really complex. Clean solution is to use the fan connector internally on the unit (if available and if it supplies 12V).

If not applicable then power it by car ignition cable. You need such a cable anyway connect it to the head unit which signals it "ignition/radio on". This line should be powerful enough to power a fan without issue.

It might also work with the blue amplifier signal line from the head unit, but I thought I read something like less than 100mA recommended power consumption. Also the cable is pretty thin. So no warranties on it, you should also not power cameras or powered microphones using this line directly. You could however power a relais which connects your fan to the 12V BATT line. However this is more complex than just using the ignition line as written above.
[MTCD Android Head Units General] dboff:
Hi, just bought my unit recently. Was very happy with the RK3188 version, just a little slow. This one is much faster, only the display is a big disappointment in my eyes. The colores are not really rich in contrast. Grey font on white background is not really readable. Is this the same issue for you too?
[MTCD Android Head Units General] strathconaman:
Strange Audio Behaviour

So...I have installed an MTCD unit into my Subaru Outback. Everything works great, except that when I turn on the headlights, the audio drops out.

Now, the OEM audio system includes an amp that requires a power signal, and i have wired it into the wire marked "amp". The harness has a wire that is 12V when the headlights are on, and open when the headlights are off. If all else fails, I can disconnect this wire, and the HU will think the lights are always off, but I would lose my nightime dimming.

Is there a setting in the software that is not set correctly? Is this a hardware only issue?

My last Android head unit (screen failed, and a story for another time) worked perfectly...
[MTCD Android Head Units General] ikerg:
So...you have an amp...and when lights on the amp disconnects....and do you notice when lights on that the screen dim?

It seems that your wiring is not well.connected. double check the wires

Enviado desde mi SM-G950F mediante Tapatalk
[MTCD Android Head Units General] newell63:
Hello.

Little question with my PX5 xtrons, i have connected my phone on Bluetooth, but when example the next day i switch on Bluetooth on my phone it don't connect automaticly with the HU, asking me the code pin every time.

If i'm connected and i power off the car, when.i restart the HU i have a Bluetooth big blue note and it don't reconnected to my phone.

Sorry if it's not clearly....

Thanks everyone
[MTCD Android Head Units General] strathconaman:
The screen dims when the headlights come on. It doesn't seem to be a shorting issue, unless there is a short on the board.

My other option is to connect the amp control to ac power, and just have it on all the time...
[MTCD Android Head Units General] CadillacMike:
could you point me towards that thread?
[MTCD Android Head Units General] SkyBeam2048:
I am having a Subaru myself too and seems I wired it like you. However Subaru is using different harnesses. I am having an 6-pin, 10-pin and 28-pin connector on car side. Maybe this one helps.

The illumination cable on my MTCD unit (orange) is connected to the 28-pin pin 3 (illumination dimmer cancel, "bright mode").

The reverse in (orange/black) is connected to 28-pin pin 2 (reverse gear)

12V ACC (red) is connected to 10-pin pin 3 (12V accessory)

On some Subaru models the dimmer illumination + might be connected on 10-pin connector on pin 10.

Perhaps you can measure the voltage on the blue AMP line from your MTCD unit. Check if it drops from 12V to 0V when you turn on the headlights. Check if this also happens no matter if you have the illumination (orange) or reverse (orange/black) connected to your car. If the AMP line is permanently on when the unit is on, then your problem is on another level.

Also make sure the "Ilumination -" cable on 6-pin pin 5 is not connected anywhere. I noticed that on some pins Subaru seems to disconnect the ground, not 12V, so if this line is ground-switched it might cause issues if connected to something.
[MTCD Android Head Units General] Wadzio:
Does anyone of you have experience with update firmware in CanBox?

Maybe someone of you know but in MTCCanbus.apk there is a piece of code (UpdateService class) that is responsible for it.

In brief:

If you enter the password canupdater or canupdates in facotry settings, the app will check the existence of the CANBUS.UPDE file on the SD card.

If the file CANBUS.UPDE does not exist and we enter the password canupdater or canupdates unit will inform us that there is no such file, as below

If the file CANBUS.UPDE exists and we enter the password:

canupdater - app will only check the existence of a file

canupdates - app will start sending the contents of the CANBUS.UPDE file to CanBox

Has anyone done something like that already?
[MTCD Android Head Units General] thewoZa:
This is a software feature. Can disable it in the settings somewhere...
[MTCD Android Head Units General] tmiller101:
Did you try to adjust the interior light dimmer switch to see if it affects the way the radio acts while your headlights are on?

That would be a quick test to tell if you have screwy wiring.
[MTCD Android Head Units General] strathconaman:
This is a 2011 Outback. The main radio harness is a 20 pin connection, except for the amp signal line witch is on a 24 pin connection.

I haven't tried this.

I will pull the unit and compare the wiring to the old harness. I had a working unit in the car (2 years old, screen failed) and I will cross reference to that harness. The issue is that the pinout for the current harness is not exactly easy to decipher. I will post a picture when I pull the unit.
[MTCD Android Head Units General] SkyBeam2048:
Then cross-check with pinout here. And perhaps try the additional recommendations like measuring voltage on AMP (blue) line in operation.
[MTCD Android Head Units General] strathconaman:
Outback Sorted

So it was a problem with the wire harness that came with the unit.

The "antenna" and "amp" circuit were both wired to Pin 2 on the 20 pin socket. That pin provides variable voltage based on the dash board dimmer. So the HU was trying to feed 12V into that circuit...probably a miracle it didn't fry something. I just took that pin out of the harness and it worked like a champ.

Seller from Alliexpress has been pretty clueless.
[MTCD Android Head Units General] kovlaszlo:
Split screen with PX5!!!

I just learned today, that split screen function is available in Android 6 as a developer function - in general. Requires rooting and a simple workaround. There are several descriptions, just google it - the only pre-requisite seems to be rooting, for the rest there are two main scenarios: developer options or changing build.prop manually, I used the letter one. Here is a dummy-friendly description, that I used:

https://android.gadgethacks.com/how...-window-mode-android-6-0-marshmallow-0165402/

Actually I was very happy about it, since for me that would be the only reason to look for a newer OS version.

So I tried today, and it really works - I attached the result.

Some weaknesses: since it is a developer function in Android 6, some features are not available, that you would find in 7 (official first release of split screen). My biggest problem is that after each restart of the device the settings for the apps have to be set again (which app should be on the right and left). Moreover, some MTCD specific apps like e.g. the radio are buggy, even without a restart and just by selecting an other recent app they "forget" that they should appear in a split mode. I will try to solve these issues by automagic (an app like tasker)

Edit 25th January 2018: the above function is a dead-end, it is an experimental function. Xposed module SkyOlin works better, as proposed by bettuccio
[MTCD Android Head Units General] bettuccio:
there was never a need for this change. I remember that I enabled the split already in the first version of the stock MX firmware in the developer options without root. I abandoned it because it did not work for all applications. Now I'm using an xposed module that allows me to open in multiwindows and not split any application. It will not need any taskers because he will always open them in window mode. Obviously the unit must have root and xposed
[MTCD Android Head Units General] kovlaszlo:
Despite of that, in your next sentence you write that you also made this tweak :)

Actually you were right, after spending some time with it it is clear to me that the split screen mode I was explaining about is a dead-end. It is rather an expirement than a working feature. So, would you be so kind, as to let everyone know, which module is it, please? I would bet this:

http://repo.xposed.info/module/com.lovewuchin.xposed.xmultiwindow

---------- Post added at 19:54 ---------- Previous post was at 19:46 ----------

Or maybe this? Looks more advanced:

http://repo.xposed.info/module/com.zst.xposed.halo.floatingwindow
[MTCD Android Head Units General] Bose321:
I've put on quite a few heatsinks on my CPU heatspreader, on the FM module, and on a few other bare parts. Just installed it in my car, and I have to say I'm super disappointed. It's around 1-2 degrees C outside, and the HU was running for a few minutes, and when I opened the Play Store and updated a few apps the temp went all the way to 90 like before. Looks like it didn't really make a difference. Then again, the load while updating apps was pretty high... Maybe daily use will be better now with normal loads, need to check that I guess...

Anyway, going to install a small 3cm fan in the back I think, and maybe a little bigger one on the top of the case blowing down on the PCB. Hopefully some air movement will dissipate the heat. Pretty worthless cooling on these units, even with cold weather outside and regular loads.

Anyone else has some tips?

Here's how it looks: https://i.imgur.com/wUQG1VW.jpg
[MTCD Android Head Units General] typos1:
Lol, I ve got a heatsink almost exactly the same as that on my unit (albeit held on by the same screws that hold the SoM to the board).

Maybe continue the discussion in the thread specifically about heat sinks ?
[MTCD Android Head Units General] Bose321:
Does yours help at all? Got a fan installed as well?

Where's that magical thread? Can't find it in the mtcd area.
[MTCD Android Head Units General] Air_Station:
ACC timeout and Sleep mode

Hello, I have a Dasaita PX5 but cant put to work ACC timeout options and Sleep mode...

Any special wiring?

Thanks in advance
[MTCD Android Head Units General] typos1:
Never monitored the temp, or had any overheating problems, just added it cos thought it was a good idea.

Theres one thread in the MTCB forum (as I think I mentioned weeks ago) which is still has relevant info, to find the other I d have to spend ages searching through the literally 100s of threads in my subscriptions list, youve looked through every single MTCD thread ?
[MTCD Android Head Units General] bettuccio:
None of the 2. This is what works well on our PX5:

http://repo.xposed.info/module/com.skyolin.helper
[MTCD Android Head Units General] ikerg:
Which MCU version?

Do you have can bus installed?

Enviado desde mi SM-G950F mediante Tapatalk
[MTCD Android Head Units General] alpha247:
Would a USB fan work if you connect it to one of the USB ports on the back of the unit?
[MTCD Android Head Units General] Bose321:
Sure, but that sounds a little complicated for just a fan TBH. And it would only run at 5V without any further tweaks.
[MTCD Android Head Units General] alpha247:
Why would that be complicated? Thought it was just plug and play. I have 2 usb port cables running from the back of the unit. Otherwise I can't find any tutorials on how to wire a fan to the car