Canon PIXMA TS9550 Online Manual page 50

12. Open multi-purpose tray guide (L) and completely press it down.
13. Place printable disc on multi-purpose tray.
1. WITH PRINT SIDE FACING UP, place printable disc, and press it against lock (M) at bottom.
2. While pressing down lock with printable disc, insert top of printable disc into slits (N).
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