hello @realzoulou write to me, I'm from Slovakia and I would try to help you restore px6.
Thanks @jogobelo I will contact you via PM.
However, a (silent) watcher of this thread from Berlin, Germany contacted me in April after my original post and I sent him the full device with SOM. He tried hard but finally had to give up because the SOM did not show activity on the USB OTG data pins. Same I observed myself before, too. But I was not not confident about my resistor soldering. The SOM is not dead. When in the device, then it starts until the Android boot logo animation and then is stuck there until MCU shuts down after ~10min. Also no reaction on the usual way to enter recovery mode (= a certain sequence pressing/releasing reset pin in a hole with a needle).
Meanwhile I found a German site which sells new PX6 SOMs for 200 EUR and I am awaiting it in the next days...
However, a (silent) watcher of this thread from Berlin, Germany contacted me in April after my original post and I sent him the full device with SOM. He tried hard but finally had to give up because the SOM did not show activity on the USB OTG data pins. Same I observed myself before, too. But I was not not confident about my resistor soldering. The SOM is not dead. When in the device, then it starts until the Android boot logo animation and then is stuck there until MCU shuts down after ~10min. Also no reaction on the usual way to enter recovery mode (= a certain sequence pressing/releasing reset pin in a hole with a needle).
Meanwhile I found a German site which sells new PX6 SOMs for 200 EUR and I am awaiting it in the next days...
A BIG BIG THANK YOU to @jogobelo for un-bricking my PX6 SOM. It was a very dificult job, but you did not give up until you were successful 
Ďakujem veľmi pekne.
Ďakujem veľmi pekne.
Hello, sorry for my English, I live in Germany. My px6 car stereo with rk3399 chip got stuck on the Android boot screen during firmware update. I made a USB cable as instructed, but the computer doesn't recognize the connection. I installed all the drivers and did everything correctly. Which contacts do I need to short to enter maskrom mode? The board revision is 10. Thank you for your help in advance!
Hi all, I have a Dasaita PX5 for Peugeot 208, unfortunately after installing the MCU (wrong version), the car radio no longer starts, useless attempts to enter recovery, nothing.
The touch keys keep flashing but nothing is seen and nothing is heard if I press the buttons, so I came across this guide and made the connections, slightly different because mine is a 76 pin SOM, HCT-PX5 rev10 , in any case, after a few attempts I saw that the pc reads the device quietly and also the rockchip tool sees the device, but when I load the android 6 image and press update I get this error "TEST DEVICE FAIL" it is not that apparently everything seems ok but there is a problem with the connection? or should I try with Android 8 if it comes out by default with that version? the chip is the RK3368 it is reported on hwdinfo on the Platform item, the MCU version is MTCE_HA, do you have any idea?
This SOM is a 76 Pin board, maybe that error program for some wrong connection, does anyone have a more detailed picture of how to connect the wires?
As for the resistors, I'm not sure I've connected them well, today I should receive a package from Amazon containing all the resistors needed.
I hope someone can help me. Thanks all in advance
The touch keys keep flashing but nothing is seen and nothing is heard if I press the buttons, so I came across this guide and made the connections, slightly different because mine is a 76 pin SOM, HCT-PX5 rev10 , in any case, after a few attempts I saw that the pc reads the device quietly and also the rockchip tool sees the device, but when I load the android 6 image and press update I get this error "TEST DEVICE FAIL" it is not that apparently everything seems ok but there is a problem with the connection? or should I try with Android 8 if it comes out by default with that version? the chip is the RK3368 it is reported on hwdinfo on the Platform item, the MCU version is MTCE_HA, do you have any idea?
This SOM is a 76 Pin board, maybe that error program for some wrong connection, does anyone have a more detailed picture of how to connect the wires?
As for the resistors, I'm not sure I've connected them well, today I should receive a package from Amazon containing all the resistors needed.
I hope someone can help me. Thanks all in advance
I don't usually write in the forums but I read a lot of topics and you have helped me a lot, especially Marchnz who has managed to recover my SOM (2 times) From Spain, I want to thank you for your help.
I also faced this question myself and this thread did not contain a workable answer for me. I have the impression that the pins to short in order to force mask rom mode are not on the SOM board but on the mainboard and hence vary from device to device. But I may be completely wrong.
Hi, what ROM version did you have before uploading the second ROM, I assume different ANDROID versions, that's why the BOOT partition got damaged. It is necessary to make a boot sd card.
If so, try to write via PM.
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21"Factory" Recovery for MTCx PX3, PX5 and PX6 SOM.
UPDATED" 26.06.2023 - Before doing this, try your Headunit USB cable first - Some headunits support OTG directly on the headunit USB cable.
Come here after using paid Software "Mod" tools like Modinstaller?
This method is the factory method, which can completely recover a "bricked" SOM, recover from failed "modinstaller" or failed upgrade of Paid mods.
Finally - OTG for all without modifying your head-unit. With only basic electronic/soldering skills, get OTG and fearlessly flash or recover a 'bricked' MTCD/E (HCT printed on SOM) Rockchip PX3, PX5 SOM.
See attached pics for making an OTG cable from a USB cable and two resistors.
Resistors are 12K and 15k (22k is probably better) or anyone of the following. combinations. These resistors are necessary as 'voltage dividers', with a value between 1.8v and 3.3 OK. These simply place a logic '1' on recovery and USB-OTG to 'tell' the SOM to go into OTG recovery mode.
R1 | R2
-------------------
1K | 1.8K
2.2K | 3.3K
10K | 18K
12K | 22K
Get Windows Driver [Driver assistant - v5.11] and[RKDevTool 2.93] for direct/OTG SOM flashing:
1. From a chinese Firefly site here
or
2. My Google Drive here
[RKDevTool] .ini file is set English, otherwise tool will be rendered in Chinese.
This tool for dumping / getting full backup of SOM
Excellent tool, thanks @RedScorpioXDA
Note - all tools and driver have equivalent Linux versions.
26.06.2023 - Android Tool is now RkDevTool
PX5 Android 9 Update.img - suitable for flashing via rockchip tools - https://yadi.sk/d/umCvHqCDzHccr/RockChip PX5 Android 9/YB
- The image is located in px5 android 9/yb. The file has "_img_" listed in the filename.
- Note Android 10 has an img file too - located in px5 android 10/chs.
PX5 Android 8 Oreo full Partition extract suitable for recovering SOM, flashing via rockchip tools - https://drive.google.com/drive/folders/1P703unZDA_TdRzl6fjkkb-YUB-KpTViW
Using the RockChip RKDevTool:
- For OREO: Unzip and flash all partitions in the ZIP file [px5_OREO_Full_13032018-UseToRecoverOrCreateNew.7zip here
- For Android 6, flash the latest update.img file in RKDevTool
There are guides to partition flashing found on the internet, would be great if anyone could contribute by posting step-by-step instructions or a video to assist others (there are now posts in this thread...)
A generic guide to the RockChip RKDevTool, flashing partitions or image files is here as previously posted.
Credit (thanks!) to @scorillo_ro for the detailed image/connections diagram.
Worst case - SOM doesn't respond - force 'maskrom' detailed here explaining what MaskRom is and here on how to for your PX5 (px3 is similar.) Steps are: Power Off SOM and disconnect USB to PC. Use Tweezers, apply power/connect USB. Hold until Windows Device chime is heard (within about 2 seconds of power on.) See attached pic.
Warning : Use thin pins for OTG cable in order to avoid the damage of the SOM connectors, although along the thread it has been noted many times that damage to the SOM socket is very likely to happen if thick pins are used...OR buy SOM header from Aliexpress, digikey etc.[/COLOR]
17/11/2019 - Edit: Corrected URL for Windows and Linux Rockchip tools
04/04/2020 - link to px5 android 9 full update.img
20.06.23 - Update broken links to driver and tool. Update Name of tool (was) Android Tool - (now) RKDevTool15Nice work @marchnz !
A full step by step and pictures howto should be made now and all those PX5 users without sdcard slots will be able to use this method to get Android8!
LE. I drew a schema4A BIG BIG THANK YOU to @jogobelo for un-bricking my PX6 SOM. It was a very dificult job, but you did not give up until you were successful Ďakujem veľmi pekne.33
Yes, on the first page of the thread you will see PX5 boards, both the green one and the blue one.Many thanks
I take it the board in the first thread above is the one out of any PX5 android car radio ?
Both are PX5 boards, just different versions...
---------- Post added at 10:01 AM ---------- Previous post was at 09:49 AM ----------
No, you can cut and use any USB cable that have at least one male plugs at its ends.
If you don't have any spare USB cable to use and need to buy one, you can buy an male to male one just to cut it in two equal parts. Use one part to build the PX5 OTG cable and keep the other one for spare
I'll also recommend the cable to be not too long and not too thin.
