Hi,
I change the rear speaker today.
After the first one, I tried, everything fine.
Then I changed the second one, no sound any more.
Could I be, that I killed the amplifier?
Maybe the unit was not yet down and by changing the wire, I got hem together?
The amplifier chip I found at ebay for 4 EUR and ordered one just to try.
Are there any other parts available? Maybe the board?
I have the following:
RK3066
1024 x 600
Mainboard:
Hui Fei
KGL-MAIN-90D-V2
2014-7-20
CPU Board:
MTC_RK3066_REV0.3a
2014.03.27
Amplifier:
ST TDA 7388
Thanks a lot
Markus
no one any idea?
Yesterday I tried to fix the AMP, but the board is so ****y, I was not able to get rid of the old AMP w/o destroying the board itself. SO I cut of the old AMP and installed an external one.
No sound is back again (and I have an AMP Transistor in spare)
Related
Hello,
as i crashed my old pumpkin head unit, i am looking for a new one, for my Audi A4
(my current model is out of stock)
I consider ordering this one now:
http://www.erisinwholesale.com/special-car-dvd/audi/erisin-es3078a-7-android-51-car-dvd-gps-dab-for-audi-a4-497.html
This one has already the Audi/VW main-connector right at the radio, also a twin fakra connector and even an integrated CAN-modul. So there will be way less wiring spaghetti behind the unit, which seems really nice to me.
But i am a bit afraid, that the radio reception could be bad...
I don´t really trust this ex China-factory twin Fakra connector there. Usually one had to use a external powered antenna boost-adapter for those android head units. And even with those boost-adapters, the reception was never as good, as with the original radio. Because no adapter could replace the twin-receiver diversity function of the original VW/Audi radios.
Sooo....
With this new unit, i would have to directly connect my antennas... without any adapters or boosters...
Has anyone an idea if this really works well on those new units??
I don´t think those new units have two receivers installed?! Or do they?
Is this twin fakra adapter at least powered?
I hope someone has already played with a similar unit and can give some comments..
thanks!
In theory it should be better with a port for the diversity antenna as well. At the end of the day this is the main reason why the original radio has better reception.
I've got the Erisin ES3015V which I suspect is similar (it has the same VW-specific connections). I have never owned any other android head unit, so I can't compare the radio reception, but I can tell you that it's not as good as the original radio. My guess is it's somewhere in between.
Hi,
Thanks!
Yes, your ES3015V should be pretty much the same, just with a different front cover. I have ordered this ES3078A now anyhow... Hope for the best...
Do you know, is this Twin-Fakra Connector at least powered? (12V) or do we need to add something here on our own?
Are you satisfied with the rear speaker volume?
This is also something, i had to modify on my first head unit.
Pedaaa said:
Hi,
Thanks!
Yes, your ES3015V should be pretty much the same, just with a different front cover. I have ordered this ES3078A now anyhow... Hope for the best...
Do you know, is this Twin-Fakra Connector at least powered? (12V) or do we need to add something here on our own?
Are you satisfied with the rear speaker volume?
This is also something, i had to modify on my first head unit.
Click to expand...
Click to collapse
Sorry, don't know if it's powered or not, but I'd be very interested in hearing about your findings .I haven't noticed the sound from the rear speakers being too low, but then again, sound quality overall isn't exactly brilliant. I've been thinking about adding a powered subwoofer, but I've read a lot of stuff on here about these units being underpowered on the RCA outputs, so I'm not sure if it'll be worth it.
2 years ago i bought a eonon unit for my ford focus (kd 7018) g616X rk3066 4.2 android. the unit was great and preformed well.
a year ago i bought another android unit but from ebay for mitsubishi outlander rk 3066 4.4. this unit had a faulty radio tuner that was poorly built. also, the reception was awful (on and off reception and need to on off the unit to hear properly)
i sold the ford car and was left with the good ford unit.
today i tried to find a solution for the tuner problem and all over sound problem in the outlander unit. i tried the dab and it worked ok, but i wanted the simplicity of the radio app. after reading a question here about switching screen i just got the outlander unit from the car and started to swap the screens.
i had much luck that the units probably came from the same assembly line but with different qc . so all i needed to do is chang two flat cables and change all the steel case between units.
after i changed the screens (and buttons and facia) it just worked!
i did not change the card with the processor and memory but to make the "face" fit i need to replace cd/case and dismantle all the unit.
weird thing was that the car symbol (ford) and (mitsubishi) "stayed" with the motherboard.
some pics:
You can change the car symbol go to factory settings and code is 126 and u can see car logos menu
or watch this video https://www.youtube.com/watch?v=h_k2Zd9dHxA
I wanted to make a new update, unfortunately I have this time my power supply by mistake the 12V + on the right pin from the front loudspeaker output
and I heard a smell (short circuit).
I attach my mainboard pictured
maybe it is enough to change a resistor (CarJoying RK3188 JY-UQ124 ). main board labeled KD-HCT-MB 2015/07/18 Rev-3.1
it it enough to change the preamp? if so where can I get the spare part?
On the preamp is the designation YD 7388 EVGaU
The radio still works, unfortunately I hear now no more sound!
Need urgent help, soldering skills are available.
Thank you
Problem solved,my Sound is back
i desoldered from my older Head Unit the Preamp YD 7388 EVGaU,it was the same Part,and soldered it to my other Car Head Unit.My Sound is back now
Please close my Tread,thx.
Hi,
I have a BMW E90 with a Eonon GA7165a PX5 userdebug 6.0.1 MXC89L with MCU Version MTCD_WWW_V2.58.1
I have the optional dab Adaptor they call V0054, it has a single USB cable out of it that plugs into the rear of the head unit and a DAB ariel that goes to the windscreen
this started back in April when I bought it maybe 50% of the stations had terrible interference and distortion on them no matter where i was whereas the remaining stations, (magic, xradio, chill.... ect were clear)
I logged it as a problem with Eonon support (which is dreadful btw) to which they told me that i needed a stronger active ariel so i left it until i got one in august,
I bought an active ariel and fitted it, and guess what exactly the same only stronger signal.
I have since discovered that the channels are only broken when the car is running and if the car isnt started every single channel is clear, and as soon as you crank the car over it distorts, and soon as you stop it, it clears back up again, below is my video of what happens, ignore the red light on the dash at the time of recording it, I needed new rear pads lol
https://youtu.be/X6GGmsABsfw
I logged it again as a problem and they this time tell me that i need a new dab adaptor and as it is beyond the 60 days warranty i will need to buy another adaptor. I can almost guarantee this isnt the case and its probbabily just interference from somewhere but i cannot eliminate it for love nor money.
any help is greatly appreciated
mick
Two years ago I purchased a PX5 Rockchip rk3368, 10.1 inch display, 4gb ram 32 gb ram Octacore Android head unit from Coika (Andoid 8.0). All was good until this morning when she didn’t sound at all. I was try to reinstal the Andoind, purchased from Hal9k, ModInstaller Pro 2. After install Android 10 i hoped the sound will going back but it did not happen. Can somone to help me? Any sugestion is welcome.
P.S.: no beep, no sound on radio, no sound in youtube. no sound at all... I guess the TDA7851 amplifier is problem.
Thanks
Matei Catalin said:
Two years ago I purchased a PX5 Rockchip rk3368, 10.1 inch display, 4gb ram 32 gb ram Octacore Android head unit from Coika (Andoid 8.0). All was good until this morning when she didn’t sound at all. I was try to reinstal the Andoind, purchased from Hal9k, ModInstaller Pro 2. After install Android 10 i hoped the sound will going back but it did not happen. Can somone to help me? Any sugestion is welcome.
P.S.: no beep, no sound on radio, no sound in youtube. no sound at all... I guess the TDA7851 amplifier is problem.
Thanks
Click to expand...
Click to collapse
Probably.
Old post but maybe it will help some other people.
I have px30 VW android HU from ISUDAR, equiped with dsp from factory. About year ago sound stopped working - no beep, no sound at all from speakers. Same situation on rca outputs.
I`ve changed the tda7851L to new one (cut-out old one, desoldered pins, soldered new one) but no luck - still no sound.
While checking the circuit, i discovered that there is only 0,5V on enable pin of the poweramp chip. I left that for almost a year Last week i`ve decided to investigate problem again.
Long story short - there are two line audio drivers (SGM8905). Both of them have enable pins too. One from the pair had partially shorted enable pin (60 ohms), that caused the big voltage drop on enable line, so the amplifier was not able to start. Changed the faulty one and second one too (it was broken too - to small amplification).
Now the sound is back.
Hi, got the same problem after 4 years of working. The sound just stopped working when I started the car. Also my working back camera stopped working. I did not change any wires within this time. I tried a factory reset. Sound and camera still wont work. Checked the fuses all good. Replaced with original stereo I got the sound back so no amp problems. What could be the problem?