Hi there,
I also have the old type BV7. I use Sony PS3 to connect the NAS to BV7 and it works fine.
You also need the optical to co-axial convertor for the sound or just accept the normal phono jack for the audio.
I have also connect the IR blaster to control the PS3 but you may need the firmware update to include PS3 in the PUC list.
Bouncer