Sony DDU100E User Manual page 23

Note:
When the drive is set up in vertical position, use the disc locks to
prevent your disc from falling. See "How to Use the Disc Locks" on
page 25 for details.
Disc locks
4
Gently push the drawer or press the eject button to close the
drawer.
The drive may begin reading the Lead-in data when it accepts the
disc. The busy indicator lights up in amber while the drive is
reading the Lead-in.
For subsequent drive operations, follow the instructions provided
with the application software you are using.
Note:
The busy indicator also stays lit in amber if:
– the disc is not properly placed on the loading tray
– a malfunction occurs.
In either case, eject the disc and place it in the loading tray again
making sure that it sits properly in the tray. If doing this does not
solve the problem and the busy indicator still remains lit in amber,
consult your dealer or qualified service personnel.
Caution: Do not forcibly close the disc drawer. Applying excessive
force may damage the loading mechanism. The tray's mechanism is
designed to operate with a "feather touch".
Operating the Drive
23