Parts list, region free procedure, connector pinouts for Aldi's Tevion TEV1020 DVD player:

http://www.users.on.net/~fzabkar/DVD/Sunplus/TEV1020/

This firmware was extracted from EEPROM:
http://www.users.on.net/~fzabkar/DVD/Sunplus/TEV1020/TEV1020.BIN

Warning: Do not use the above firmware to flash the player from a CD dvdrom.bin file. The checksum needs to be recomputed before doing this.

The decoder chip is a Sunplus SPHE8202D.

A USB port can be added simply by connecting a suitable cable to the unpopulated 4-pin USB connector at the front of the PCB. USB functionality is already present in the firmware.

Note that Aldi also sold another DVD player with the same model name, but using a Zoran chipset.