yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] pk313:
Sorry malaysk! your firmware is the better firmware I'm happy to use this you have make a big work

It's fast and stable....I only ask if was possible or there is an option that I don't have see on the setting!

I was sorry for what's appened to you....and also for this....I donate to u....

Was...just a normal question!!!!

So please or you don't reply or simply reply that is not possible

Inviato dal mio SM-A500FU utilizzando Tapatalk
[MTCB Android Head Units Q&A] Rog_82:
Anyone?

Or is it time to take the unit out, use a tin opener / hammer / crowbar to rip open the DVD drive and throw the remains of the unit in the bin?
[MTCB Android Head Units Q&A] i.draskovic:
I have same problem. All keys work, but DVD, Loud and Ams has no function. When I press Eject button it opens DVD application and play movie. When I press it again it turns off DVD application, but i can not eyect DVD :)

If I find solution I will share.

But, when you are in recovery and when you want to re-flash MCU only, you can see

Recovery system v4.4.22

-- Update rkimage...

Instalation rkimage start.

Finding update package...

=== UPDATE RKIMAGE ===

Find and check firmware...

Can not found firmware image or invalid image.

Update rkimage complete

Instalation rkimage aborted.

This part is clear... Recovery try to find update.img. I don't want to update it, so I did not save it on sd card. But after that comes confusing part for me :) System try to find another files also. Not only mcu.img

Installation mcuconfig started.

Installation mcuconfig aborted. (no file)

Installation keycfg start.

Installation keycfg aborted. (no file)

Installation mcuimg start.

Installation mcuimg success. (file is on sd card)

System will now power off.

I think that there's something with this two files mcuconfig and keycfg, but I do not know where we can find them to try.
[MTCB Android Head Units Q&A] Reptile-X:
Hi Kaween,

Thanks for the heads up, I really appreciate it :)

I have no idea why my amp IC keeps getting busted, this happened after changing the speakers, I am not professional in car electronics but I am electrics engineer for 20+ years and have worked on my cars all the time when it comes to audio, tuning and such, thus I think it’s not my install which cause this problem.

I did measure the temperatures on my unit at my electronics bench too and the back plate gets hot, but not insanely hot, it’s a KGL unit with thick aluminium back plate. Last year I was on vacation in Italy with the car and the temperatures went up to 50 Celsius in the car when parked and when I came to the car and started the unit it didn’t give problems, we even drive around for 27 hours with 2 drivers nonstop with TomTom and Poweramp running without a single problem.

I am even more cheap **s than you probably :D I went for a Caliber too, but yesterday I found out that my unit have the wrong wire loom for RCA outputs, I miss front left and front right in there, I contacted my seller about this since the manual and the pictures show those RCA outputs, on my connector which goes in to the head unit there are some unpopulated connections. Rear RCA's are there :eek:

Thus I can’t use low RCA inputs and have no time to wait for the seller, so had to find an external amplifier with high speaker inputs, only brand I could find for cheap was a Caliber CA-450, and thanks for the warning about the amplifier not going off with REM wire on these units, I will check that out for sure.

Little bit off topic here but I see you are an electronics fan too, it is just hobby for me but check my workbench here and show me yours if you want :o I like to see workbench pictures to have neat ideas for myself.

http://i193.photobucket.com/albums/z298/Bl4ckW0lfi3/new_lab__finished002_zps377be558.jpg

http://i193.photobucket.com/albums/z298/Bl4ckW0lfi3/new_lab__finished001_zpseecdccf7.jpg

http://i193.photobucket.com/albums/z298/Bl4ckW0lfi3/new_lab__finished004_zps99a26fc5.jpg

It is little bit of both, mechanical and electronics, I should say mini mechanical tools LOL.
[MTCB Android Head Units Q&A] kaween:
NICE ! Green monster of envy poping up here. Hehehe. My workbench is a .... somewhat more chaotic (lack of space). :D

A lot less multimeters (4), 4 scopes of which 2 are digital-memory scopes. 2 SMD stations., a couple of stabilized psu's and the normal junkyard of spare parts to do most of the repairs myself.

But I hardly get to use it these days as life continues to throw curveballs in my direction. Ah well, hoping for better things in the future.

My hobby included "ye normal repairs of "everyday electronic devices" to computers (notebooks mainly) to repairing Vacuum Tube radios. The oldest I've got in restored working state is a 1933 Philips branded unit but as said, it's been years ago since I last got to do what I really like to do due to time, work, and health restrictions. :(

I'm a bit puzzled about that high input thing - but I guess it depends on the headunit and cartype/loom (?). Or do you mean to say the connections aren't there on your headunit itself ?

On my car and headunit, I had the choice to use High level inputs (using the Iso Inline loom adapter for the CA475) or line-input levels using the cinch lineoutputs of the JY unit. I'm using the line output of the JY myself but that's more out of gut-feeling than out of a confirmed technical reason. I hope/expect that when not using the JY's powered amp outputs, I can maintain a cleaner sound signal to the Caliber that -I have no doubt in my mind- has a much cleaner signal path than the JY's internal electronics do provide.

Anyhow, keep us posted and I hope this solution works out well for you.

I suspect you have checked your complete wireloom (at least the speaker-related connections) to exclude some kind of odd issue there that would explain killing off your internal amp ?
[MTCB Android Head Units Q&A] mike.s:
Next time, you might want to try changing to a STPA003OD. They're rated for lower impedance (2 ohm), and more output. Pin compatible, except pin 25, which is an open collector output, so should be able to be tied to ground or preferably pulled up with 47K ohms.
[MTCB Android Head Units Q&A] kaween:
You mean, force stop radio when switching to poweramp playback ?

You can always do stuff like that using Llama. Create a rule that upon Poweramp becoming active, you force-kill the radio app.

I used that on other units which sometimes didn't behave when soundsources got mixed.

[MENTION=2471548]mike.s[/MENTION] : good call, didn't even know about that one. Question then of course is does the internal power path of the unit cope with that ? On the AN21, more powerfull amp chips were retrograded by users, but they needed a stronger voltage regulator to be driven, otherwise soundput would be comprimised.
[MTCB Android Head Units Q&A] typos1:
Like the KGLs, the KLD has a thick back plate/heat sink.

My KLD has a fan, a few months back KLD stopped fitting fans and left an empty hole so at lesat one could be fitted easily. Later versions now have this hole blocked up ! I guess they think the back plate on its own is enough.

Interestingly the fan on my unit sucks the air out of it, rather than blows like the one you fitted.
[MTCB Android Head Units Q&A] mike.s:
One of the other differences is that the STPA003 works down to 6 V, with soft clipping. There's a section in the datasheet which covers it.
[MTCB Android Head Units Q&A] kaween:
.... fan setups that have an exhaust opening will "suck air out of the unit". That's normal thermal design.

On the JY, there's no hole in the backplate. So i had the choice of either cutting a hole in that backplate, or just force an airflow over the components using the units "holes everywhere" design. To do that, I need to blow the air over the components.
[MTCB Android Head Units Q&A] jperezch:
Hi Dsa

I'm sorry to bother you with such a repetitive question, but do you have any plans to, eventually, generate a pre-root image based on original RK3066 JY 1024x600 firmware from 150609? :fingers-crossed:

I'm not asking for a hybrid version, that is clear you are not going to do anymore, just injecting root into original image available at Carjoying web site.

Thanx :good:

---------- Post added at 02:44 PM ---------- Previous post was at 02:32 PM ----------

Can anyone confirm this method works on head units with Android 4.4.4?
[MTCB Android Head Units Q&A] JPS11:
"The Annoying power button on top seams useless to me (top Right) if I accidentally touch it the unit turns black and no way to bring it back, I Do have Hardware buttons.

Malaysk can you change the behavior of the power button so if it is touched it does nothing unless it is held down for 3 seconds?

as is touching the power button turns off the screen and no way to turn it on again even with hardware button.

I dont think hes gonna do that, the whole point is you press once to turn the screen off and press and hold for reboot options. It usually works on all units apart from the full touch ones."

What about switching the press actions on the power button?

Long press reboots system.

Short press brings up the menu which can then be cancelled if it was a mistake.
[MTCB Android Head Units Q&A] NYCAR:
I had done that. That is what led to my questions. You programmers can take it for granted that installing a new ROM tautologically means "rooted", but I did not grasp that. Perhaps a line can be added to that post to clarify (for ignorant people, such as myself) that installing a new ROM actually IS rooting for 4.4.

Hell, it might even say that somewhere, but I completely missed it the many times I read it all.

---------- Post added at 11:01 AM ---------- Previous post was at 10:57 AM ----------

Downgrading XposedMTC

My research has led me to believe that I need to downgrade XposedMTC two levels in order for my head unit to actually pair with my OBD2. But, every time I try to install the earlier version, I am told that it is not successful.

I have the latest version installed and active (thanks to installing the newest ROM (see earlier posts from yesterday)). The ONLY thing I have tried to do is install from APK-Installer and from the Xposed Framework. What other steps am I missing? Do I need to deactivate/uninstall/delete the newest version first? If so, how?

Thanks.

---------- Post added at 11:06 AM ---------- Previous post was at 11:01 AM ----------

Sure, but there should be SOME way to turn the screen back on. Certainly came as a surprise to me when I first hit it.
[MTCB Android Head Units Q&A] kaween:
Tried it; Did not work with none of the Kingroots I found, and the one linked in the original message was a 404 (file not found). So I dug up the Kingroot repository and tried every version there.

"no root for RK3188 found" or something similar was the only response I got trying every single version.

Installed Malaysk's latest version instead and I'm pleased with that ... although I liked the original JY Radio apk layout better. Will have to dig up the original version one of these days.
[MTCB Android Head Units Q&A] agentdr8:
To downgrade, uninstall the newer version first. Android by default does not let you install an older version apk if a newer one already exists. There are ways around that (adb, pm commands) but it's just easier to do it with the GUI.

I have a newer release that should resolve the need to downgrade to get BT working. I hope to have it tested and uploaded this weekend.
[MTCB Android Head Units Q&A] edit:
By any chance did you had the time to look into the SW app switching resetting (with lovely looping in my case) issue?

Many thanks for your hard work !
[MTCB Android Head Units Q&A] agentdr8:
I'm still in the concept phase with that work. It's a much larger task that will take a lot of time to implement. Fixing the existing NPEs and crashing would end up taking almost as much time, so I'm focusing on just rewriting the whole thing.
[MTCB Android Head Units Q&A] edit:
The RK3188 got to 61C running some more demanding apps (gps) or just sitting at idle most of the time?

Have you glued an small heatsink over the RK3188 to help with the heat disipation?

It's not clear for me what's the intake (fresh air from outside the unit or just warm air from onside the HU) for your fan because once the air inside the unit gets hot I don't know how much cooling the small fan can provide.

Your improvements are great but some pictures would be gold, can you please post some?

Thank you !
[MTCB Android Head Units Q&A] maverick_37:
JY launcher .apk

Hi all,

Sorry in advance for the question, probably on the forum already but I'm in a tight spot with my time on this.

Can anybody point me in right direction for the launcher from Joying for the 1024x600 model (Launcher2mtc2.apk if i'm not mistaken).

I have the image but don't know how to extract the .apk.

I'm using the rom from Malaysk, briljant by the way but I like the launcher from Joying.

Thanks for the reply
[MTCB Android Head Units Q&A] edit:
I used the software and things got a bit better.... 50% better, lol.

I am monitoring my HU for the last 3 days and it's a hit and miss with the Viper4Android service... there are times when it starts and times when it does not.... usually it is either Waze or Deezer app that was active at shutdown.

At this point I have no clue what to do. My guess you are out of ideas...

Is there a way to make the unit forget the last active app at startup? (I am thinking that this is the only workaround possible in my situation)

Thank you
[MTCB Android Head Units Q&A] Reptile-X:
I don’t even have a digital scope :) one 2x 20Mhz and one 2x 100Mhz with whooping 4kb memory LOL, Tubes are nice hobby, I am mostly busy with mechanical mods, and the Multimeters got out of the hand, it get in to collecting than using them all. I am mostly on one my Fluke 87’s

Yes I miss two cinch line outs on my head unit, the wire loom I got out of the package was wrong, I just noticed that after 14 months, didn’t pay attention to it.

The Caliber I got has both, high and low inputs, for time being I am going to use high outputs and when/if the seller ships out the correct wire loom I will go over cinch connectors.

Like you said, I measured everything, opened up all door cards and measured the wires till the head unit, there is nothing wrong with the wiring. Maybe it was pure coincidence and not related with the speakers. If that’s the case I will find out after installing the new IC and hooking the Caliber to the head unit, if the IC gets busted again than I might have a faulty board, which I won’t like, just couple weeks before my vacation. If it keeps working than the Pioneer’s are no go for this unit.

I will report back for sure, need to install 6GB card for the vacation too, but unit has to work for that so I am keeping my fingers crossed.

Thanks for the tip Mike, if this don’t work I might try another chip indeed, I was planning to try the Toshiba which was suggested by trypos1 but the retail price was €35, I rather try the external amp option than blowing up €35 to be honest :D

I can’t order from China, because I don’t have time for that at the moment.
[MTCB Android Head Units Q&A] TiBiSMART:
Thanks for your answer.

I don't understand why cut the power cable?

If i cut it what am i going to experience? Any wheel button will work?
[MTCB Android Head Units Q&A] g5flyer:
Network service

Greetings all, I bought a HSDPA usb dongle from pumpkin and i was wondering if anyone in the U.S. was using one? Just trying to figure what service providers are compatible and how to setup.
[MTCB Android Head Units Q&A] TiBiSMART:
Thanks for your answer. I tried any settings but it doesn't helped. I will try any other cars canbus setting maybe will help
[MTCB Android Head Units Q&A] NYCAR:
Great! I'll just hold off until Monday.
[MTCB Android Head Units Q&A] MayfairDROID:
I have been curious of this as well.
[MTCB Android Head Units Q&A] kaween:
Running radio app and nav. Temps varried between 57°C and 61°C doing just that. Measurement was done after 20 minutes of Igo-demo-navigation.

Running Navi didn't really have a big impact as the temperature on the RK3188 body remained more or less unchanged after shutting Igo down. However, later on I realized I've got "Gala/SDVC" on all of the time so essentially, the gps system is running all of the time too.

I would not be surprised if video playback would show a much higher impact on the temps but I haven't tested that on the RK3188. On the AN21 with its 2core MST786 cpu, the impact of DVD playback on the temperature was HUGE, the temps jumped up by roughly 10°C nearly immideatly. There too,, I had to change the thermal situation as my first unit died to what I believe to be thermal overload after just a couple of very hot summer days.

In terms of airflow intake, the unit isn't exactly airtight now is it. Enough big mounting holes on either side (actually, it's pretty much hole-riddled on the sides).

The fan just serves to force an airflow in the unit and over the cpu.

I did use a stick-on cooling body at first, but I've decided to remove it. Reason : I've had these things come loose in pc enviroments after a couple of years, and those pc's don't move. In a car, being a "rattle and roll" kind of enviroment and without an easy way to mechanically fixate the cooling body, I did not have much faith in the longlivety of such a solution.

The fan is an server-chassis meant 5cm fan used to cool a 19" server rack (plenty of room as I don't have a DVD unit in my JY) and the temperature measurements after mounting it were satisfactory.

Measurement of temperature was done not by software, but by sticking a thermal sensor on the cpu during tests. So if you'd argue I only measured the surface temp of the cpu package, you would be correct. Still, I trust these measurements enough to presume they're valid. As these units are reported to have some kind of over-temperature-protection and users have reported their units to fail powerup at very high temps, it's safe to presume the situation with fan may not be optimal, but it will be an improvement. :)

I'll post a picture of the fanmount tomorrow. To feed the fan, I just hooked the fan up to the AMP Control line, so the fan stops when the unit is powered down, and runs whenever the unit is working;
[MTCB Android Head Units Q&A] Enc0der:
Actually the power button does nothing on short press in my unit (with hardware buttons).... long press bring the reboot menu.
[MTCB Android Head Units Q&A] Stickypinkyfinger:
Wonder if anyone can help. I just flashed an update zip of JY with the MCU of JY, my model is the 4.4.4 and it restarted and now all I get is no command. What's happened here as I got the right ROM. Mine is the by 1024x600
[MTCB Android Head Units Q&A] mike.s:
I'm new to these units, but have been doing a lot of reading. I have a Pumpkin KD-C0234 ( RK3188, 800x480, KLD2 2.51). Installed the "regular launcher" version and quickly was confused - none of the additions mentioned were there. (update_4_4_4_800X480_RK3188_2_MAL_11_06_2015.rar)

Finally installed the "NEXT launcher" version - and there it all was! The preinstalled apps, the added settings, everything. (update_4_4_4_800X480_RK3188_2_MAL_NEXT_LAUNCHER_11_06_2015.rar)

It could be me, but it sure seems like the "normal launcher" file is broken. I did check the version/build dates for each after installing, and they matched.

Anyone else?
[MTCB Android Head Units Q&A] MayfairDROID:
I just use the newwst Kingroot, and it did NOT work for me on 4.4.4 Rk3066.
[MTCB Android Head Units Q&A] akrasky:
Hui Fei KGL NO AUDIO from USB and SD card

I just disassembled my unit to check if there is something of visible internally that caused the NO AUDIO from USB or SD sources but nothing.

I would refresh my issue , hope someone can help:

*** my unit has an Hui Fei KGL 90D V2 board RK3066 1024x600 1gb RAM 8GB ROM - Volkswagen fit***

- no audio from USB or SD card but radio and DVD are OK. I repeat: RADIO and DVD works fine, only USB and SD have NO SOUND

- I tried factory reset (126 password) without results

- I tried with and without the CAN-BUS module with a fresh factory reset on each try: no results

- the rear unit Fuse is ok

- car speakers and wiring are ok (I already told you that radio and DVD works fine!)

- I checked settings trying with can-bus off and VW Can-bus with no results

- Tried with different USB devices and different SD cards with same results: NO AUDIO

For first days the unit works fine in audio also if it has got other problems (like no rear camera switch and other problems).

The unit is sold by Erisin with the code of ES9405A

Can't get any kind of support from Erisin in any way (they try to make me nervous with no answers or answering after 1 week and saying stupid things)

What I can try before to trash my unit for no audio from USB and SD card ?

Thank you very very much!

Please help. Thank you!
[MTCB Android Head Units Q&A] agentdr8:
Sound from USB and sdcard would be Android audio, whereas DVD and Radio audio is controlled by the MCU. So it's either the "sys" volume, or the android image. I would try another firmware image before junking it.
[MTCB Android Head Units Q&A] akrasky:
Thanks for your reply.

Sure, I checked for sys volume and it's setup to 10. I tried to increase and decrease the Sys value, also to MAX and MIN but still no audio from USB and SD card.

What you say about firmware image could be a good solution but why the unit should stop playing audio with the existing firmware?

I would remember that the unit worked fine for some days and I never touched firmware or other software functions.

Thank you
[MTCB Android Head Units Q&A] MayfairDROID:
Who knows. Maybe an app you downloaded screwed up the setting, maybe it is something more. there could be a million reasons that it stopped. Only one way to verify it is software related, and that is to load new ROM, and go from there. I would NOT mess with the MCU though if you radio and DVD work.
[MTCB Android Head Units Q&A] agentdr8:
No clue as to what happened or why, just offered something to try before it ends up in the junk bin.
[MTCB Android Head Units Q&A] akrasky:
ty, I will try to flash the rom :S
[MTCB Android Head Units Q&A] JPS11:
We are talking about the software power button on the notification bar on [MENTION=3590033]Malaysk[/MENTION] ROM's. While very useful for most headunits, headunits without hardware power buttons can not turn on the headunit after pressing the software power button with the current configuration unless they restart the car.
[MTCB Android Head Units Q&A] akrasky:
What about KGL firmware? I can't find it, only KLD an JY on the 1st page.
[MTCB Android Head Units Q&A] agentdr8:
Check the Huifei file mirror here hosted by [MENTION=2067704]dark alex[/MENTION]
[MTCB Android Head Units Q&A] MayfairDROID:
The firmware is universal. The only difference is the launcher. I believe they are based of KLD because they release the most updates. Only the MCU must match your type.
[MTCB Android Head Units Q&A] MYKK:
I loaded [MENTION=3590033]Malaysk[/MENTION]'s ROM today and noticed quite a bit of static when music was playing from any source (always the same amount; increasing volume did not increase static). I did not notice that from the stock ROM (I'm not saying that [MENTION=3590033]Malaysk[/MENTION]'s ROM has more static, just that I noticed it today and don't recall it being there when I used the stock ROM.). Can anyone verify that this is normal or how to fix it if it isn't normal?
[MTCB Android Head Units Q&A] doctorman:
[MENTION=3590033]Malaysk[/MENTION] I have Hardware button and I suffer from this bug of the power button crashing my unit.

3 seconds hold works great but if I touch the power button the screen goes blank and no way to turn it on till reset it .
[MTCB Android Head Units Q&A] Stickypinkyfinger:
Wonder if anyone can help. I just flashed an update zip of JY with the MCU of JY, my model is the 4.4.4 and it restarted and now all I get is no command. What's happened here as I got the right ROM. Mine is the by 1024x600 rk3066