Sony DDU1632 - Manual (Page 10)

2
2. DVD Region Coding
Region Playback Control Management
You can only play DVD-Video discs with the same region code as your DVD-Video Playback
system.
As for DVD-ROM drives, one kind of the DVD-Video Playback system, there are 2 types:
RPC Phase 1 (as RPC1): RPC1 drives do not have built-in hardware support for region
management. DVD-ROM drives of this kind don’t play a part in controlling the playback
region. It solely depends on the decoder.
RPC Phase 2 (as RPC2): RPC2 drives maintain the region change count information in
hardware, and in general, the region of such drives can be changed up to 5 times by the end
users under some software decoder.
About This DVD-ROM Drive
This DVD-ROM drive you have purchased is a RPC2 drive and the first region code will
depend on the DVD title you play. You are allowed to modify the region code 5 times. After
the fifth alteration, the region code will be locked and only those DVD titles of the same region
code could be played afterwards, so set the code carefully.