Old Q&A-Thread - This Thread will be split into multiple KB-Thread soon

[Blaze Falconburger]

Thanks for the reply. Yes - mono mic, mono socket. With the mic connected I can ohm out the signal pin back to pin 4 on the BT board, so sure connectivity is good.

 

[dazza007]

so here are some images of the 7 floor modification and some less technical descriptions of what to do
The following is for a WM8731S and BD37033FV

You need 2x 1k ohm resistors, a good quality clean soldering iron, solder, flux and a steady hand!

On the android board - Solder wire to resistor R268 and R49 that connects to the WM8731S these are pin 23/4




On the main board find the resistors r70/1 and remove them these connect to the mcu chip and you are removing the connection to the mcu but the pin out furthest away from the label has a connection to the BD37033FV sound processor pins 25/6


solder a connection onto the pinouts furthest away from the label. Ensure that there is no connection between pinouts where you removed the resistor and soldered in the new wire

connect the wire you have just soldered to the original wire you solder using a 1k ohm resistor (to replace the resistors you removed)
Ensuring that you have the following connections:

R268 - R71
R49 - R70

Using a multimeter ensure that you have nearly 2 k ohms resistance through the resistor R268 to connection R71 and through R49 and R70

If you are getting errors look at 7 floor post the forum on pda.ru - ensure you have 2k resistance through the resistor R268 to connection to the chip BD37033FV
the pins 25/6 on the sound processor are the third and fourth in from the top left.


Any questions please ask!

 

[Hisma]

so here are some images of the 7 floor modification and some less technical descriptions of what to do
The following is for a WM8731S and BD37033FV

You need 2x 1k ohm resistors, a good quality clean soldering iron, solder, flux and a steady hand!

On the android board - Solder wire to resistor R268 and R49 that connects to the WM8731S these are pin 23/4
View attachment 3520439

View attachment 3520440

On the main board find the resistors r70/1 and remove them these connect to the mcu chip and you are removing the connection to the mcu but the pin out near the label has a connection to the BD37033FV sound processor pins 25/6

View attachment 3520441
solder a connection onto the pinouts nearest to the label. Ensure that there is no connection between pinouts where you removed the resistor and soldered in the new wire

connect the wire you have just soldered to the original wire you solder using a 1k ohm resistor (to replace the resistors you removed)
Ensuring that you have the following connections:

R268 - R71
R49 - R70

Using a multimeter ensure that you have nearly 2 k ohms resistance through the resistor R268 to connection R71 and through R49 and R70

If you are getting errors look at 7 floor post the forum on pda.ru - ensure you have 2k resistance through the resistor R268 to connection to the chip BD37033FV
the pins 25/6 on the sound processor are the third and fourth in from the top left.


Any questions please ask!

Exactly what we needed. It doesn't get much more straight forward than that. Doesn't mean this will be easy though, lol. Much appreciated.

 

[dsa8310]

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[JrFaust]

so here are some images of the 7 floor modification and some less technical descriptions of what to do

Any questions please ask!

I've been trying to follow what this modification accomplishes but I don't feel I understand.
Is this a general sound fix or a just a microphone fix?
Is this for both the RK3066 and RK3188 boards?

And is this a stand alone mod or is there software to install to complete the modification?

Thank you,
Robert

 

[Cratebv212]

rk3066 mcu gs rooted firmware

Hi, new here. I have double din rk3066 mcu gs kk 4.4.2. I can't get any rooted roms to install. I keep getting img load failed.

 

[7floor]

Beware that it appears that NO extra resistors are needed (or so I gathered from @7floor's explanations).

That's simple: you unsolder two resistors and you may reuse them, as I did.
If you break them while unsoldering, or if you find them too small to reuse, you may use another pair, bigger and easier to handle, for instance.

 

[dazza007]

[/COLOR]
Beware that it appears that NO extra resistors are needed (or so I gathered from @7floor's explanations).[/QUOTE]

I was going on this post
http://forum.xda-developers.com/showpost.php?p=63327738&postcount=19964
@7floor can you confirm that no extra resistors are needed?
I will amend my post above (and take the resistors out of my box before putting it back in my car!)

 

[7floor]

Beware that it appears that NO extra resistors are needed (or so I gathered from @7floor's explanations).

I was going on this post
http://forum.xda-developers.com/showpost.php?p=63327738&postcount=19964

@7floor can you confirm that no extra resistors are needed?
I will amend my post above (and take the resistors out of my box before putting it back in my car!)

Have you noticed the following in the post you are reffering to?
"you can use removed resistors or others"

 

[Malaysk]

NEW from 27 October, 2015
Only for RK3066 800X480

Most global firmware update from me, perhaps a few months to 800X480.
Changes, updates, deletes, transfers, etc. lots of. I write about everything I will not. Here are just a couple:
+++ Android part of 10 October.
+++ New NEXT launcher - a slightly redesigned our radio me
+++ The new boot logo (the very first - that appears when you download a few seconds)
+++ Added gradient Status Bar (Settings - System)
+++ A new panel ext. programs and recently run (Settings - System)
+++ Added new tab in Preferences - Advanced Settings screen (think there will understand)
+++ Fixed program MTCBlueTooth - incorrectly displays the number of the incoming call
+++ Well, and so on. D.

Firmware I have not done a simple upgrade - erased all the data. Make a backup of your applications (System Settings then do by hand - not to restore from backup !!!)
HERE

 

[Blaze Falconburger]

The so called pin #4 of the BT card is the pin that was connected to C32 which in turn was connected to the internal mic(+). Double check it, starting from the internal mic(+) end, in order to identify correctly pin #4 of the BT card.

---------- Post added at 10:51 AM ---------- Previous post was at 10:48 AM ----------

It checks out - it also checks out with the marking on the back of the BT board (mic)

I confirm Th mic signal from the socket has continuity to pin 4 on the BT card, which has continuity to the pad where the C32 resistor was but not to the other side which is cut.

Stumped here, was expecting this to be easy!

Is there a BT mic volume in software that needs to be enabled or set?

 

[halloj]

It checks out - it also checks out with the marking on the back of the BT board (mic)

I confirm Th mic signal from the socket has continuity to pin 4 on the BT card, which has continuity to the pad where the C32 resistor was but not to the other side which is cut.

Stumped here, was expecting this to be easy!

Is there a BT mic volume in software that needs to be enabled or set?

AFAIK there's no mic volume adjustment. What kind of mic is it, some microphones need a supply voltage to work. There's no such thing present
in this HU. Have you tried the cheap Chinese mic? They don't sound good but you could at least test it for function.

Have you checked your soldering, so you didn't drop solder in between the connecting pins? We have had that in this thread before.

 

[dsa8310]

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[Blaze Falconburger]

AFAIK there's no mic volume adjustment. What kind of mic is it, some microphones need a supply voltage to work. There's no such thing present
in this HU. Have you tried the cheap Chinese mic? They don't sound good but you could at least test it for function.

Have you checked your soldering, so you didn't drop solder in between the connecting pins? We have had that in this thread before.

Good point about the mic - how can I check this? I'll see if I can find an old mic somewhere

I am using this one: http://www.amazon.co.uk/gp/product/B003Q0WR5W?psc=1&redirect=true&ref_=oh_aui_detailpage_o09_s00

edit- I've checked the soldering, everything looks clean as far as I can tell, nothing obvious at least..

 

[dsa8310]

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[halloj]

Good point about the mic - how can I check this? I'll see if I can find an old mic somewhere

I am using this one: http://www.amazon.co.uk/gp/product/B003Q0WR5W?psc=1&redirect=true&ref_=oh_aui_detailpage_o09_s00

edit- I've checked the soldering, everything looks clean as far as I can tell, nothing obvious at least..

That mic is the ultimate one for car use. I'm using that one in two installations. Except for any problem
with that particular mic it's good. Dsa 8130 above has another input you might consider. On the other hand
your connector is grounded in the chassis if I understood you correct. The shield should than be left open in the BT end.

 

[mikejclark]

@veget83 I sent a PM to your inbox.
It seems as if you had an Audi A3 like me and I am having serious problems getting CAN-Bus to work correctly.
Probably we could sync our settings so to say. Could you please have a look at my question catalog I sent to you?
I hope I can find a solution by this.
(Anyone else having an A3 8P could contact me, too)

Hi Alex
I have and A3 8P. I am in the process of retrofitting a multifunction steering wheel and will need to figure out how to get the steering wheel controls to work with my unit. What problems are you having?

Sent from my GT-I9505 using Tapatalk

---------- Post added at 07:57 PM ---------- Previous post was at 07:47 PM ----------

I ordered my audi a3 unit from keylo on aliexpress and never received the correct fitting brackets so my unit is hanging out I can no longer contact keylo on aliexpress and the other contact Hanker Yu, from the same company (HuiFei), says I bought my unit from a fake company!
Does anyone have a reliable contact where I could get the brackets from? Preferably from UK. I have given up with the original seller

Sent from my GT-I9505 using Tapatalk

 

[7floor]

I've decided to make a separate thread for my MTC Sound mod here:

http://forum.xda-developers.com/and.../mtc-sound-controlling-bd37xxx-sound-t3234660

In that thread, I will publish updates and provide support regarding the mod.

 

[almdoki]

hello, suddenly the screen every time I turn the car beeps sound to light but not turn it on screen, it goes black and nothing works

 

[Blaze Falconburger]

Next to the MIC+ pin (#4) of the BT card there is a recommended SGND pin #5 to use for external mic's ground (do not use use pin #3 though it's SGND marked, too).
Avoid ground loops - use only one ground point (preferably pin #5 of the BT card).

I use a Parrot external mic: http://store.parrot.com/ie/parrot-s...hone-for-ck3000-evo-ck3100-3520410020841.html .

That mic is the ultimate one for car use. I'm using that one in two installations. Except for any problem
with that particular mic it's good. Dsa 8130 above has another input you might consider. On the other hand
your connector is grounded in the chassis if I understood you correct. The shield should than be left open in the BT end.

With C32 removed the internal mic is dead, as is the external built in rear jack - so this confirms it is the correct resistor.
Bt with the new mic directly on the BT card pins 4 & 5 I get nothing - I would expect this to just work as it is direct on the card, continuity is good everywhere I've checked (it feels like a hundred times now). Totally stumped here. The BT card isn't dead as it can still make calls, play audio etc, I just can't get the input to work :s