Put Arduino in DFU mode (no RST pin) The instructions to put the Arduino into DFU say I should shortcut briefly the 2 leftmost ICSP headers next to the USB port.

But my board does not have them. Does anybody know what are the right headers or if it is at all possible to set my board into DFU mode?
This board doesn't use as USB adapter an ATMega16u2 with Arduino firmware. It uses a simple USB chip CH340. So you can't put it in DFU mode to upload a firmware.