Download Android Nougat 7.1.2 stock firmware PC version for Tanix TX2 TV Box from here or here. Download Android Nougat 7.1.2 stock firmware SD card version for Tanix TX2 TV Box from here or here. Download Android Marshmallow 6.0 stock firmware for Tanix TX2-R2 TV Box from here. Download Rockchip Driver Assistant v4.4 from here and download Rockchip Batch Tool v1.8 from here.
Archive: TX2_3229_7.1_20180308 / TX2_3229_7.1_20180308_SD
Model: Tanix TX2 TV Box
Image file size: 696 MB / 674 MB
Platform: Rockchip RK3229 / RK322A
Image name: TX2_3229_7.1_20180308.img / TX2_3229_7.1_20180308_SD.zip
FW version: 7.1.02
Boot version: 2.37
Build number: Android/rk322x_box/rk322x_box:7.1.2/NHG47K/zhengz03081416:userdebug/test-keys
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.