M Vision CINE 400-3D Service Manual page 27

Wait about 20 Second, you'll see like follow.
It's means "Download OK"
4.3 How To Download Video BD IC626
1. The unit is full set.
2. Connect RS-232. (Baud Rate is 9600)
3. Key in "op△powon" to power on.
4. Key in "op△dlgf" to switch DB9 to Gennum.