SamyGO

I want to help with hacking Samsung TV J Series, I'm trying to decrypt the firmware, So I'm wondering if you already know where is the serial port located, And if it is possible to get a shell from the serial port, also Do you know if the J series have regular Hard drive? and is it encrypted?, Also If you need help with hacking, I can help I'm owning a Samsung J Series TV and I have knowledge in reverse engineering software.

Thanks for your help.

You have all in exlink. Simply connect rs232 to your computer

Do you know where can I get main board sketch or something that will help me to locate the physical connections of exlink?, cause I see exlink tx rx written on the main board but I don't know where are the physical connections.

Also do you know how do I enter service menu in order to change RS232 UART mode to debug mode? I dont have [FACTORY] button on the remote nor [ INFO ] button

Mikaop wrote:Also do you know how do I enter service menu in order to change RS232 UART mode to debug mode? I dont have [FACTORY] button on the remote nor [ INFO ] button

You can use any samsung IR remote control to enter normal Service Menu to enter extended service menu you need factory IR remote or smartphone with build IR and app "SRC Samsung TV"

Thanks, I see i have two unmounted 3.5mm ports on the main board, one of them is probably the ex-link... each port have two 3 metal surfaces in triangle shape(probably one triangle is TX and one is RX) and a hole (probably for GND), when I checked the voltage on those metal surfaces with multimeter, I got 0V, I tried to connect to them my USB to TTL and open putty on the correct COM but I didnt see any data... What is the problem? Also I'm assuming that for each triangle, all the 3 metal surfaces needs to touch the cable that goes to the usb adapter, is that correct?
Also in this usb device im connecting TX/RX/GND without 5V or 3.3V, is that correct?
Also in the Service menu, in the Sub Option i have "UART Enable" option should it be ON or OFF (RS232 Jack is on Debug)

TTL doesn't work on J/K using RS-232, check new wiki page:
https://wiki.samygo.tv/index.php5?title ... J/K_Series

zoelechat wrote:TTL doesn't work on J/K using RS-232, check new wiki page:
https://wiki.samygo.tv/index.php5?title ... J/K_Series

The wiki is incorrect, There is no 3.5mm port that can be connected to, I opened the TV case, I need to solder the cable to the unmounted 3.5mm port, And the points where I need to solder (both RX and TX) have 0 Volt, What went wrong?, I'm guessing that the points to solder shouldn't be 0 Volts, What's the voltage I should look for?Thanks.

Mikaop wrote:The wiki is incorrect, There is no 3.5mm port that can be connected to, I opened the TV case, I need to solder the cable to the unmounted 3.5mm port, And the points where I need to solder (both RX and TX) have 0 Volt, What went wrong?, I'm guessing that the points to solder shouldn't be 0 Volts, What's the voltage I should look for?Thanks.

Wiki is not incorrect, only mid/high-end models have Exlink. Sorry but no idea about voltage nor where to solder, I just can tell you that TTL doesn't work on *existing* Exlink port.

Thanks, savan. What is micom_tx and micom_rx? I don't familiar with this term