Pioneer MJ-D508 - Manual (Page 15)

After a short time the recorder shows the message No Disc to tell you
it's waiting for you to insert a disc—don't try and load a disc until you
see this message.
Load an MD.
Gently push the MD into the slot in the direction indicated on the disc
cartridge. The recorder pulls the md into the
recorder automatically.
The first thing the recorder does is read the table
of contents (TOC) to see what's on the disc. If
you've just loaded a blank MD, the recorder
displays the message Blank disc; press ^ EJECT
to eject the disc.
If the MD has a disc name recorded on it, the recorder displays the
name.
Press ► (play button) to start playback.
The recorder finds the first track on the disc and starts playing.
If you've loaded a prerecorded disc, the recorder displays the track name
of each track as it plays. Track names longer than 12 characters scroll
across the display.
If you're playing a home-recorded disc, the recorder will display the track
names if they're there, otherwise it simply says No Name.
Use these controls for other basic operation;
Q] Press II (pause button) to stop playback temporarily.
(Press ► (play button) or ll again to resume playback.)
[ 2 ] Press ■ (stop button) to halt playback completely. (If you press ►
now, playback starts again from the beginning of the disc.)
@] Press ^ EJECT to get the disc out of the recorder.