MTCD schematic

[marchnz]

Found - MTCD Schematic. A most valuable find on russian android car audio forum and attached here.

[Android Car Audio]

The schematic corresponds to a GS Mainboard I have as a spare part. It varies to my JY board in terms of USB operation, with this board OTG is provided for.

 

[MbTaNk16]

This is ridiculously helpful, regardless of what MTCD manufacturer you have. I've had to replace MOSFET's and internally shorted caps in my KGL before, and having a general reference like this would have made the process so much quicker. Cheers!

 

[marchnz]

This is ridiculously helpful, regardless of what MTCD manufacturer you have. I've had to replace MOSFET's and internally shorted caps in my KGL before, and having a general reference like this would have made the process so much quicker. Cheers!

Indeed! I was astounded to find this. Unfortunately I still wasnt able to get my PX5 board to go into maskrom for OTG flashing, but is probably something I am not doing right. Schematic is absolutely valid and is spot on for MTCD GS.

18/07 - Was able to put PX5 into OTG [LOADER] mode after modifying board.

 

[marchnz]

Thanks @cupi1234

 

[cupi1234]

Anyone with a 4pda account - can you please try and download and attach here - http://4pda.ru/forum/dl/post/9567228/MTCD++Witson-A510-2016-04-28+V01.pdf
[MTCD Witson-A510-2016-04-28+V01.pdf - 4PDA]

witson

 

[747 Driver]

Hi, does somebody knows the wiring of the PB76FSAP-S, an MTCD from Ownice (C500). I am trying to connect a OTS020 tpms to port F. The OTS020 has 4 wires, +, gnd, data and something else. I want to know how the unit supplies power and wich pins are used for data.

Thanks.

 

[typos1]

Hi, does somebody knows the wiring of the PB76FSAP-S, an MTCD from Ownice (C500). I am trying to connect a OTS020 tpms to port F. The OTS020 has 4 wires, +, gnd, data and something else. I want to know how the unit supplies power and wich pins are used for data.

Thanks.

The Ownice C500 is not an MTCD unit. Ownice dont make MTCD units, their units are of an entirely different design with totally incompatible software.

 

[Jimbo2032]

Source for Raw Audio Output?

Looking at this schematic on page 10, it appears that the section labeled 'ARM' would be the interface connector from the Android board to the MCU Board.

Following @dazza007 's and @7floor 's posts below, it looks like the raw audio output from the Android Board is available at pins 12 and 13. Without a schematic of the Android Board I can't be sure, but I assume that these should trace back to pins 12 and 13 from the WM8731 Audio Codec chip.

If I'm correct and we could harness these raw line level audio outputs it could give the people that were looking for a clean feed for DSP's and the like.

Full disclosure, I do not have one of these units yet but am looking at a GCS Apex branded unit that appears to be a MTCD KLD model per the merchant website pictures. http://www.subispeed.com/2013-crosstrek/interior/audio-stereo-upgrades/gcs-apex-android-v2-head-unit-w-gps-2013-2016-forester-crosstrek#.WgRiFFuPLIU

dazz007
https://forum.xda-developers.com/android-auto/mtcb-hardware-development/mtc-sound-controlling-bd37xxx-sound-t3234660
7floor
https://forum.xda-developers.com/showpost.php?p=63520630

 

[747 Driver]

The Ownice C500 is not an MTCD unit. Ownice dont make MTCD units, their units are of an entirely different design with totally incompatible software.

Please enlighten me. It says MTCD in the settings, I have a GS v 2.56 running.

What type of unit is it? According Xtrons it is a PB-76FSFAP-S. What type is it (MCT/B/C/D/E?)

Thanks

 

[typos1]

Please enlighten me. It says MTCD in the settings, I have a GS v 2.56 running.

What type of unit is it? According Xtrons it is a PB-76FSFAP-S. What type is it (MCT/B/C/D/E?)

Thanks

If it says "MTCD GS" in the MCU field then you have a GS MCD unit.

Xtrons are simply resellers - they buy units from various manufacturers and then give them made up model numbers.

Ownice are an entirely different company that make entirley different units.

 

[bluemask69]

i have a GS PX5 Android 6.0 ( now migrated to Oreo) unit, i'd like to know if this board have USB OTG port.
I need to connect a USB/SPDIF Converter , the Matrix X-SPDIF2, and it is Android 8 certified for USB OTG port.

 

[Xorit]

PX5 MX2 Unit No RESET

Hey guys,

I'm half offtopic here, but my thing has to do with the schematics / HW mod (can't open topics due to low post count..)

Just recently bought a replacement for my Opel Astra J '12 and ..

It's a MX PX5 4GB Oreo sold by Witson.

This HU is very specific, because it comes in two parts.

1. Silverbox with the MCU and sockets + 2. Display board with SD slot

My point writing here is, that it doesn't have a reset hole - Oh well yea it has, but behind it there's nothing to push

Desperate as I am, I wanna have a reset button to enter recovery and .. well - if it gets stuck, to recover.

As the silverbox will be behind the dash, my only option would be the display board, where I found two connectors having a PIN def for RST_KEY and now I need instructions how to do the cabling, as I'm not sure how to achieve the reset function.

RST_KEY + GND ?

OTG? Found a little connecter not having a corresponding plug (white 8PIN in IMG_2613)

-> Pictures

abload.de/gallery.php?key=sNOKaV7R

Would be cool if you guys help me out

BR X

 

[bunnymc]

Hey Xorit,

I guess you've got the v5754 unit.
The reset line won't help you for recovery, I tried the same and reset is only a hard reset.

I've soldered a cable to key1, gnd and led8v on the display part (under the back cover), put a plug on the end and placed it in the glove department.
I then made a small pcb with a tactile switch connecting key1 - gnd and a 12v led on led8v and gnd, with this you'll be able to enter recovery by holding the button until the led flashes 3 times and then stays on,
Releasing it for a second and the keep on pressing, releasing, pressing for a couple of times.

I'm not sure if you're able to flash any custom rom because the sd slot on these units is a USB converted and not a gps slot.
Btw. I flashed mine with a custom rom by extracting the board, placing it in a xtrons model and then puting it back.

 

[Xorit]

Thanks for that super helpful post!

Just ordered the needed components

Yep, indeed the V5754.

Dunno why they didnt wire any of those support keys.

Thanks mate!

Hey Xorit,

I guess you've got the v5754 unit.
The reset line won't help you for recovery, I tried the same and reset is only a hard reset.

I've soldered a cable to key1, gnd and led8v on the display part (under the back cover), put a plug on the end and placed it in the glove department.
I then made a small pcb with a tactile switch connecting key1 - gnd and a 12v led on led8v and gnd, with this you'll be able to enter recovery by holding the button until the led flashes 3 times and then stays on,
Releasing it for a second and the keep on pressing, releasing, pressing for a couple of times.

I'm not sure if you're able to flash any custom rom because the sd slot on these units is a USB converted and not a gps slot.
Btw. I flashed mine with a custom rom by extracting the board, placing it in a xtrons model and then puting it back.

 

[Xorit]

got it working with ur directions!

the button mutes on single press, so it might be possible that the mute button on the steering wheel will do the same..would be weird tho.

might be helpfull for those who have no reset button either!

that new button selects options on single press in recovery and activates on long press, just like the normal reset hole.

->
on the display board you have two flat flexi cable connectors (not in use), where there are pin outs for usb + led + 2 keys.

thanks again!

 

[Antoz1103]

Hey i have one Question. It says u can Solder it directly to the SOM or with a Flexible flat Cable. I have on my Unit the SOM and this is connectet to the Bigger Board. On this Bigger board i have 2 Flat Flex Connectors. Can i use them for this method?! And if yes wich one is the Right flat connector and where to get a flexible Band cable!? Would help me much if someone helps me because i have done the USB OTG Cable mod and now i have no Recovery and no USB anymore so i can not flash anything. I tried flashing in Android an MCU update but it does not do. Downloaded all to the units internal storage.

Greetz Tom

 

[bunnymc]

Nice I'm glad that it did the trick for you

The mute button from your steering wheel won't work because it's connected via canbus (same as cd3/4/600 button panel).
The mute from the soldered button is just a setting in the firmware (you could change it with the steering wheel button assignment settings to whatever you want.

I also added 2 more tactile switches to the key1 line with different resistors (resistor ladder) to be able to use them as hardware buttons (e.g. Vol up/down and power) but haven't had the chance to test it yet.

got it working with ur directions!

the button mutes on single press, so it might be possible that the mute button on the steering wheel will do the same..would be weird tho.

might be helpfull for those who have no reset button either!

that new button selects options on single press in recovery and activates on long press, just like the normal reset hole.

->
on the display board you have two flat flexi cable connectors (not in use), where there are pin outs for usb + led + 2 keys.

thanks again!