yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] DJCannonball:
why deactivate the amp chip? if you don't connect any speakers to it, there is no current. when there is no current, the amp-chip is not loaded and doesn't have to supply power to the speakers.

i have 2 external amps. 4 channel amp for speakers in the doors/dash and monoblock for the sub. The internal amp-chip is really worthless piece of sh*t (at least KLD models), i recommend anyone to use external amplifier(s), even if you only use factory build-in speakers. the difference in soundquality is ridiculous.

anyway i haven't disabled the internal amp-chip, but i just don't use it (nothing connected to it).
[MTCB Android Head Units Q&A] Kristapsl12:
Could it be something with wiring. In the PIC wires 10, had key1, key 2 and RDS. Did not connect them. If they should be connected, then where

http: // www . erisinwholesale.com /u_file/images/14_11_21/4175ebe290.jpg
[MTCB Android Head Units Q&A] weapons777:
1.- Change the DPI in Settings (Don't remember the exact name) Display Density. The higher the number the bigger the icons. DPI 240 should be fine.

2.- Go into Settings - System - Clock and adjust settings to you liking.

3.- Download from here: http://huifei.fs-fileserver.de/content/apps/MTC Launchers/JY-KYD-MTC 4.4.4/Launcher2mtc2.apk
[MTCB Android Head Units Q&A] coolxal:
Did you ever fix the WiFi issue?

I'm having the same issue, the WiFi tries to turn on, flickers for a split second and then turns off.

---------- Post added at 02:22 AM ---------- Previous post was at 02:16 AM ----------

So my WiFi is not working.

I'm not rooted and I can't root because it requires WiFi.

I can't flash a different firmware or ROM cause I'm not rooted.

WTF do I do now?
[MTCB Android Head Units Q&A] edit:
Nice features and it will definitely look good (visually).

From my own point of view this is why I really NEED this app.

I love this app/feature (switching between apps) simply because it will help me a lot with keeping my eyes on the road and less on the unit.

For me it will be GPS app - Music app switching mainly, and it's one thing to push a SW button once without looking at the unit or the SW button and it's another thing to :

(things differ depending on the traffic but in the city this is how it goes)

1. look at the unit to identify the home button on the unit (I have a hardware home button but most don't) or the virtual home button on the screen - push it

2. look at the road a bit more

3. look at the unit again to identify the GPS app icon or the Music app Icon - push it

4. look at the road

So 1 click of a button without looking at it or the unit versus at least 2-3 peeks at the unit and some screen pushing... if you want to go back to the other app ad 2-3 more peaks or only 1 more SW button push

The problem with the screens and virtual button(s) is that you really need to look at the unit to locate them.... you can't feel them by touch unfortunately and this is not good in a car but I guess I have to adapt eventually.

Bottom line, I do appreciate your work a lot and I am looking forward for a beta :) (or final)

Thank you !
[MTCB Android Head Units Q&A] mike.s:
That's incorrect. The datasheet for the TDA7388 (what was actually in my unit, the TDA7384 is similar) shows that it has a quiescent current of up to 350 mA @ 14.4 V. That's 5 Watts of heat, with no speakers and no signal. If you put it in standby (ST-BY pin grounded), that goes down to 20 uA (0.000288 Watts).
[MTCB Android Head Units Q&A] DJCannonball:
sorry, i didn't know that. but still 5 watts of heat isn't that much. i have been driving for 3 weeks with no speakers connected to the internal amp (only 2 external amps) without heating problems. is it really worth the hassle to ground the st-by pin?
[MTCB Android Head Units Q&A] jeroensteinvoorte:
You do not need root to flash new firmware.

Download a new image from the server. Copy update.img to the root of the GPS microSD card. Insert in the unit. Wait until the unit mounts the card. Hit the update button. The unit will reboot en start flashing the new firmware. You will get root access for free as well.
[MTCB Android Head Units Q&A] andr786:
has anyone got the 3g dongle to work yet? i'm on mcu 2.53 and 4.4.4, i've installed ppp widget 2 and it displays the widget but i also get a message along the lines of ' not allowed to install from apk'
[MTCB Android Head Units Q&A] jperezch:
Looks great! mode swtching is my favorite XMTC function.

I hope you can also fix the problem of hanging when switching 4 or 5 times.
[MTCB Android Head Units Q&A] Krisjan89:
1. Maybe.. try some off the different canbus types in factory settings ( password: 126) and see if the adaptor works with some of the other types.

2. The controls can't be rearranged if you are using a Cambus adaptor.
[MTCB Android Head Units Q&A] Kristapsl12:
Thanks for replay. Will try to play with canbus settings. An yes, I have a canbusbadaptor in units wiring harness. It is really sad, that I am not able to reprogram buttons, as I am not able to answer calls from steering wheel.
[MTCB Android Head Units Q&A] jperezch:
[MENTION=3590033]Malaysk[/MENTION] ; [MENTION=6041319]dsa8310[/MENTION] : can you give me some tips on this?

Thanx
[MTCB Android Head Units Q&A] OnkelDeffe:
Deactiating AMP chip - which pin?

Is there any difference in connecting the ST-BY pin with AC-GND or using the MUTE pin?

Greetings

Deffe
[MTCB Android Head Units Q&A] mike.s:
Yes. You won't save any power when using the mute pin.
[MTCB Android Head Units Q&A] jperezch:
Thnk you Dsa! that's of great help!

Just another question... My unit has 8Gb of memory, and the original rom assigns just 1 Gb for system memory and about 6Gb for internal_sd.

I'm currently using one of your pre-rooted images and it assigns 3Gb for system and a bit less than 4Gb for internal_sd.

How can I achieve the same modifying the original image myself?

Thanx! :good:
[MTCB Android Head Units Q&A] agentdr8:
Yep, that's definitely the goal of the rewrite. Functionality-wise, I'm hoping to be able to rotate the carousel with the mode button down press (in addition to the normal touch and drag), and with an adjustable keyup delay, make the source selection. In addition, I'm writing a new preference fragment to be able to configure however many apps are to be added to the source carousel, and each app will have settings denoting whether or not they produce audio, and if so, which audio source. Most all non-MTC apps will use the "sys" source (I'll probably name it "Android"), but this will (hopefully) eliminate any overlapping audio issues when switching sources.
[MTCB Android Head Units Q&A] Precision340:
Nope, unfortunately wifi is still an issue for me. I replaced the wifi antenna but that did not fix it. I did get further in troubleshooting the issue. I was able to collect the logcat file, which is an event viewer for processes running in the background. It seems that the wifi driver is failing to load for my unit. So it could potentially be a software issue. I read somewhere that it could be due to compatibility issues with the boot image and the system image. Not sure where I can find the oem images though.. or whether or not they are inlcuded in the firmware or mcu images.

As for your issue with loading the ROMs, you can copy the firmware file to your sdcard, plug it into your unit and it will prompt you for installation. Be careful with the MCU files as these are unit specific. What unit do you have? I have the KLD model S07 (for Kia Optima). If you want root, you can try one of Malaysk ROMs.

You can also try this link: http://www.hotmcu.com/wiki/Flashing_Firmware_Image_Files_Using_The_Rockchip_Tool

It provides step by step procedure on how to flash images using the Android Tool.

Good Luck and keep me in the loop if you find a solution. I'll do the same.

P340
[MTCB Android Head Units Q&A] Marius B:
front usb

my front usb dont work . it is posible to be a software problems ?
[MTCB Android Head Units Q&A] kmtk:
Is this a HuiFei head unit?

http://www.aliexpress.com/item/GPS-...S-Radio-DVD-Player-Android-4/32331047470.html

I'm thinking about buying this because it's the only Android head unit I found that looks like it'll fit in a standard double din opening. I have an AN-21U and it's slightly taller than the double din opening in my car. Does anyone know of a Chinese Android HU that fits a standard double din opening?

Thanks.
[MTCB Android Head Units Q&A] kaween:
Not a Huifei persé, but It's an RK-based unit discussed on this thread and compatible with the software/firmware/tweaks on this thread. If the pictures ands specs are to be believed, it's a JY unit, and I know JY did propose to sell that specific unit you're posted, but I went for the "lets make that opening in my dash bigger and go for the 7" machine" approach. I Have no regrets about doing that.

That specific unit/front is about as close as you'll get to a small-sized dashboard opening-double din mount. The others have bigger fronts afaik.

You might want to shop around for the quad core 3188 version though. (just my opinion) as going from a MST 786 to a RK3066 ... not so sure about the worth of going from one pretty good dual core to another slightly faster dual core. Be warned, the MST786 AN21 boots a lot quicker than the RK3066 does, despite of the higher clock of the RK platform and overall better performance of the RK.

[MENTION=5863025]Marius B[/MENTION]. : no, it shouldn't be software related.
[MTCB Android Head Units Q&A] kmtk:
Thanks, found a seller offering to upgrade to the RK3188.

http://www.aliexpress.com/item/Capa...ERSAL-with-GPS-Radio-Wifi-3G/32250021621.html

Would you know if the RK3188 option is worth the upgrade from an AN21?
[MTCB Android Head Units Q&A] gazdaaa:
Button lights

Hi, I have KGL unit, firmware KGL4-2.53

The thing is, button illumination is always on, regardless of light switch, the illumination wire works because when I switch the lights on, the screen dims. Shouldn't button backlight work in a way that when you don't have lights turned on, they aren't illuminated ( like the rest of the car dash)?

Does anyone have similar thing?
[MTCB Android Head Units Q&A] kaween:
Hmpf. Debatable and totally user-specific. No easy answer possible.

If you need more horsepower for you installed apps ? Yes, but only if you go for the 3188, don't even think about the 3066 in that case.

In terms of soundquality, the AN21 is clearly the better unit of the two (more powerful, cleaner soundpath and no tweaking with V4A can hide that). Also the handsfree system of the AN21 is clearly better when compared to the RK under equal circumstances (with and without external mic). FM reception is somewhat better on the AN21, AM reception .... is miles better on the AN21.

Out of the box, the AN21 can do most stuff you can only do with the RK after installing extra software ... which brings me to the strong side of the RK's :

The RK platform enjoys a very much alive community, you have access to a lot of friendly users with some serious mojo in terms of applicable knowledge, and it shows in the amount of extra software available for these RK-units which solves most of the shortcomings of these units or adds the stuff AN21-U users would miss (SWC control with 3th party software, Gala/SDVC functionality ...... but the list is substantially longer than that)

The fact that the cpu board (the som) can be upgraded/exchanged to hopefully a Lollipop-capable version is pretty much unique compared to any other presently available 2din unit. Several brands have made it clear Lollipop will arive on these units, in one way or the other. Normally I'im very pessimistic about such claims but in this case, I do not see any reason not to believe those claims.

The currently present RK3188 is a LOT more performant than the MST786 ever can be.

Upgrading now from one dual core to another : wouldn't recommend it. Go with the 3188. Depending on your needs and wishes and typical usage, the migration to an RK3188 may or may not be worth it : it depends too much on what you use your unit for the most, and if you're willing and wanting to spend some extra time on these units.

Compared to the RK's, the AN21's are pretty much something of a black box. The only units you'll find more freedom with than the RK's are the Newsmy's .... but those are pretty much "a labour of love and still have a long way to go - not denying they have already come impressivly far compared from where they started-.

---------- Post added at 12:38 AM ---------- Previous post was at 12:32 AM ----------

Yep. And if thats not the case with your machine (has it ever worked ?), a couple of things you can check :

- Illumination wire of the headunit should be hooked to a illumination wire of your car, or when not present, to a power line that only goes "hot" when your interior dashboard lights go on.

- or go to the factory settings (code 126) and check the status of the "button lights" checkbox in the "other" menu
[MTCB Android Head Units Q&A] mike.s:
Go into the Factory settings menu (password=126). On my KLD, there's a setting there which turns the button illum on all the time.
[MTCB Android Head Units Q&A] kmtk:
Thorough reply, thanks.

My main concern is a clean OEM look, so getting rid of the hack dash trim kit around the AN-21 and its ugly blue lights that don't match my interior lights :).

I use the head unit for Waze, Spotify, Soundcloud, Youtube, that's pretty much it. Sound quality being worse is a bit disheartening considering I already find the AN-21 to be piss poor. No problem with this unit being more hands on, I enjoy the tweaking.

---------- Post added at 08:08 PM ---------- Previous post was at 07:22 PM ----------

http://www.aliexpress.com/item/4-Qu...tereo-Head-Unit-DVD-GPS-Navi/32338743154.html

This one also seems to be smaller than 179x100mm. The AN-21 goes right up to the edge.
[MTCB Android Head Units Q&A] Marius B:
The same mcu i have and dont work iluminated good. All time it is on. My saler tell me that it is ok lume that. I tried more settings but all time it is on.
[MTCB Android Head Units Q&A] nrh_racing:
Hi

I have rear headrest screens connected but only work when i play a dvd on the headunit. All my movies are on SD card or usb which, is there any way to make these play to the rear screens or even if the rear screens mirrored the front unit the whole time

Thanks
[MTCB Android Head Units Q&A] Brendo:
If you used search, you'll find the answer is no. And the answer is no because there are two parts to the hu; Android and MCU. MCU controls hardware independent of Android (such as dvd, Bluetooth, radio)
[MTCB Android Head Units Q&A] OnkelDeffe:
How to open this connector?

Hi, I was brave enough to open my Erisin 9007 unit but don't know how to open those tiny little connectors; don't want to damage anything (see attachment)

BTW: I saw that they only use a short piece of cable (about 10 cm) as "wifi antenna" - would it make sense to install a better solution?

Thx

Deffe
[MTCB Android Head Units Q&A] kaween:
Depends on where you measure it. The protruding part is 177x100. The wider backside part of the bezel is 182x100. Have both AN21 and this exact unit so can compare both units pretty easy.
[MTCB Android Head Units Q&A] Graves33:
Does anyone have a recommendation on a irs for viper4android on these units? I listen to anything from metal to rap. Most of the irs ive seen are for headphones. Thank in advance for the help.
[MTCB Android Head Units Q&A] solmer:
Hi check in Factory options, i saw an option about KeyLed, I'm not sure but I guess it controls the key light....

Good luck !
[MTCB Android Head Units Q&A] agentdr8:
Pull the brown squarish "locks" on both sides of the flat ribbon cable out (away from the connector).

And if you search this thread, you'll find some pictures from others that have replaced the small wifi antenna with longer ones.
[MTCB Android Head Units Q&A] ktibor69:
Your solution is OK.

Is your HU slow? I have Dual core HU. I installed the latest Malaysk ROM, but the video playback and the live wallpaper are jagged. The change of the tasks very slow. What can I set , that the HU will be quickly?

Before upgrade I hadn't this problem. I had Coudu's ROM.
[MTCB Android Head Units Q&A] devilsoft:
I attached to this post, an archieve with about 250 IRS files.
[MTCB Android Head Units Q&A] Graves33:
Thank u Devilsoft. I will add them to the ones i have. I was just wondering if anyone was using a certain one for the headunits. Like one they like or use the most. Thanx again :o
[MTCB Android Head Units Q&A] OneCheekyDevil:
On my old KGL that i had, i found that the newer MCUs would leave my lights ON irrespective of whether my headlights were on or not. Flashing an older MCU solved the issue AND gave me better wifi reception too. I know the last part sounds weird, but there was a post quite awhile back where others did some experimenting with different MCUs and found there was something the manufacturers were messing with in regards to power management with the wifi chips that was interfering with signal strength.
[MTCB Android Head Units Q&A] kaween:
You simply pull those little brown tabs backwards (NOT upwards !). The left tab is already slightly opened if you look at that picture. When unlocked, they'll be approx 2 mm "out" instead of flush with the white part of the connector.

Once open the flex slides out.

A better antenna will always yield a better result.

---------- Post added at 10:57 AM ---------- Previous post was at 10:47 AM ----------

If you don't mind tweaking, you'll have loads of fun with these units.

As for the sound, I installed an external Amplifier on the unit I've got here -which is exactly the same unit as you posted here above- and on this unit, it's well worth it.
[MTCB Android Head Units Q&A] devilsoft:
Well, i played with them before, but I don't use it now. I just customize the settings in Viper app without IRS.

IRS can sound different from a sound system to another and also, ears differes :) So, you just need to try all of them and decide yourself :)
[MTCB Android Head Units Q&A] veget83:
Impossible to solve my problem....

I have format the internal sd and flash a new rom ( jy 444)

Flash work perfect, and new rom are great...

But the problem persist.

Notifications bar, home button, back button etc.. don't work... Only dead

Any ideas!?!?!?[emoji20] [emoji20]

It's possible a hardware problem !?

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[MTCB Android Head Units Q&A] DjCalvin:
Do a hard reset of the unit. If that doesn't work then email your reseller for a warranty claim.
[MTCB Android Head Units Q&A] doctorman:
[MENTION=3590033]Malaysk[/MENTION] 3rd time I ask this if anyone has an answer please....

can I use the System UI from the Quadcore Malaysk ROM in the Dual Core ROM?

I want to use the patched SystemUI.apk that does not have the power button as my wife keeps touching the power button and it shuts off the Head unit , so it had to be reset while driving.

hopefully this bug will be fixed in the next released.
[MTCB Android Head Units Q&A] MatzunaTata:
You have flashed the wrong mcu file, try different files.

The HardwareButtons are managed by the mcu :).
[MTCB Android Head Units Q&A] kmtk:
That's my plan. I'm also thinking of doing head unit->USB DAC->Amp. That should sound better than my current set up, AN21 wired directly to the car speakers. My understanding is the only downside of DAC is it won't handle sound coming from the MCU (radio, BT, etc).
[MTCB Android Head Units Q&A] ktibor69:
JY Firmware 10 June changelog

Update file for 10 June mainly add and repair this:

1. Some bugs for Radio.

2. Shutdown delay when ACC OFF. You can set it 5, 10, 30 mins or 1, 2 hours.

3. Playing music. Allowed to play music automatically when the USB or SD card inserted.

4. DVR storage locations. You can choose the Nand Flash, GPS card, SD card, USB Storage 1or USB Storage 2
[MTCB Android Head Units Q&A] veget83:
I tried to open the unit and check the connections ...

Nothing ...

Do not feel anything

Is there a way to shift the status bar down! ??

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[MTCB Android Head Units Q&A] pk313:
do you know which kind of bugs was fixed for the Radio?

Thanks
[MTCB Android Head Units Q&A] kaween:
That sounds logical enough, but I think hooking up the unit using low-output/line output levels to the external amp should prevent audio-signal degradation due to a cheapo internal Amp anway. But I'm no sound n*zi : I was happy enough with the AN21's soundoutput in my car (the unit has found a new home im my wifes' car) but in my car, the amp chip of the JY unit simply didn't like my aftermarket speakers at all.

I installed a cheap "D"-class amp between headunit and speakers and all is good. (see a couple of postings back, I posted some extra info which you might find interesting concerning the usage and oddities of an external amp on this specific headunit).
[MTCB Android Head Units Q&A] kmtk:
Hmm, that's a shame. The pictures make the difference between the unit and the protrusion look greater than 2mm overall. I was hoping they'd get the size right with the 2nd(3rd?) generation of products. The DIN opening is usually 6 13/16" (173.037mm). I still might pull the trigger, I don't see anything from Pioneer, Alpine or any of the other brands worth buying.
[MTCB Android Head Units Q&A] Tumke32:
MX MCU Help please! part 2

Alright can anybody help me to find the car stereo manufacturer of the MX MCU??? Or is it an idea to open my carstereo an look for the MCU chip, will that clear things up?

Some simple but probably stupid questions who can help me to clear things out ;

Hui Fui is the brand of all or units?

KGL / MX / JY etc are Hui Fui models ? or are KGL / MX / JY company's who modificate Hui Fui units ?

MCU's are named to companies like KGL / MX / JY ?

Witson for example is a reseller?

Is there a official Hui Fui website?

Who uploaded the MX MCU 2.16 to dropbox? Maybe he can help me find a new firmware.

Were can i find my MCU chip?
[MTCB Android Head Units Q&A] DjCalvin:
You probably flashed the wrong mcu.. need to flash the correct one. What was your mcu version before you flashed it?
[MTCB Android Head Units Q&A] veget83:
My mcu is always the same.... 1.77

I never flashed another mcu... I really think a hardware problem

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[MTCB Android Head Units Q&A] kaween:
Yeah I know. My car originally had only a 1din opening and mount. So I reworked the dashboard with an aftermaket kit allowing 2din units. There too, the opening is rougly 174x100, which fitted a specific AN21-U perfectly and actually chose the AN21 mainly because it fitted that size.

I more or less said "f*** this" and reworked the dash again to permit full versions like the one you posted after I realised the measurements and pictures were very misleading in terms of bezel sizes.

It was fiddly work to do it without leaving a trace or damage, but it can be done and I'm glad I did it.

I can imagine this isn't always a viable solution without the propper tools or experience, but a good bodyshop should be able to help you with this. I do understand how a clean installation may be important to you : I'd go crazy if I'd have to look at a piss-poor installation job although I drive a very cheap type of car. Things must look factory installed for me or I won't even consider doing it.

The main problem is that 2din doesn't say anything about the actual dashboard clearance. 173x98 is called "narrow" or "Honda-type" on most sites, but it's not an industry standard afaik, and the're enough cars which will accept a full 180x100 without any issues;
[MTCB Android Head Units Q&A] DjCalvin:
Another reason to go back to the vendor. If you didn't flash anything, its gotta be a hardware issue.
[MTCB Android Head Units Q&A] 16volt:
TomTom and Bluetooth audio

Can anyone help me figure this one out, if i am playing my podcast from my android phone through my Bluetooth on my stereo, and i try to open Tomtom, it turns off the bluetooth audio.

And suggestions on how to stop this?
[MTCB Android Head Units Q&A] veget83:
In effect....

Now I find a way to bring the status bar in bottom part of display or find a gesture with replace the and open the status bar...

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