Brand: PIONEER
Category: Audio Player
Document Type: Manual
Language: EN
Manual for PD-M403
Uploaded: Nov. 21, 2025, 7:10 p.m.
Manual Publish Date: 1993-01-01
Warranty Information
Refer to the Limited Warranty sheet included with your product for warranty information.
To Play A Compact Disc:
- Turn on the player.
- Insert a magazine into the slot. If the power is off, inserting a magazine turns it on automatically.
- Press the Play/Pause (►/II) button to start playback.
To Pause Playback Temporarily: Press the Play/Pause (►/II) button during playback. Press it again to resume.
To Stop Playback: Press the Stop (■) button. Pressing it twice returns to the beginning of the first disc.
To Stop Playback and Remove Magazine: Press the Eject (hutton, remove the magazine, then turn off the power.
Disc Search: Use the DISC button or DISC NUMBER buttons to select a disc, then press ►/II to play from the beginning of that disc.
Track Search: Use the ◄◄ or ►►►► buttons to advance to a desired track or return to the beginning of the current track.
Repeat Playback: Press the REPEAT button to repeat the current track or all tracks.
Random Playback: Press the RANDOM PLAY button to play all tracks in random order.
Magazine Hi-Lite Scan: Press HI-LITE SCAN to play short segments of tracks/discs.
Program Playback: Use PROGRAM and track selection buttons to create a custom playback order.
Delete Program Playback: Use DELETE to remove tracks from playback.
Troubleshooting and error codes
| Symptom | Cause | Remedy |
| Magazine is not expelled when the EJECT button is pressed. | Power plug is disconnected from outlet. | Connect plug to amplifier or wall outlet. |
| When playback is started, it stops immediately. | Disc is loaded upside down. Smudges, etc., on the disc. | Load the disc correctly with the label side DOWN. Clean the smudges from the disc and then play it again. |
| Pauses or stops during playback. | Output cords are connected incorrectly or loosely. Incorrect operation of stereo amplifier. Pin plugs and/or amplifier terminals are dirty. Player is in pause mode. | Connect properly. Check the settings of amplifier switches and sound volume controls. Clean away dirt. Press the ►/II button. |
| No sound | Incorrect connections. | Connect to amplifier's AUX or CD terminals. Do not connect to PHONO terminals. |
| Sound is distorted, noise is output. | Pin plugs and/or amplifier terminals are dirty. Interference is being picked up from a TV set. Interference is being picked up from the CD player. | Clean away dirt. Switch OFF TV set, or move player away from TV set. Turn off POWER to the player, or move the player away from TV or tuner. |
| The picture of the TV screen is fluctuating or FM broadcast has noise interference. | Interference is being picked up from a TV set. Interference is being picked up from the CD player. | Switch OFF TV set, or move player away from TV set. Turn off POWER to the player, or move the player away from TV or tuner. |
| Remote control will not function. (PD-M423 only) | Dead batteries. Too far from player or wrong angle. Obstruction between player and remote control unit. | Replace batteries. The distance between remote control unit and player should be no more than about 7 meters (23 feet). The operational angle against the front panel is within 30° from right or left end of player. Relocate remote control unit or remove obstruction. |