Sony Walkman MZ-R91 - User Manual

Questions and Answers

D
Dr. Dennis Short MDAug 13, 2025
What to do if my Sony Walkman MZ-R91 recorder does not work?
- B
  Brenda FitzgeraldAug 13, 2025
  If your recorder isn't working well, start by checking that all audio sources are securely connected; try disconnecting and reconnecting them. Ensure the HOLD function is disabled by sliding the HOLD switch in the opposite direction of the arrow. If moisture has condensed inside, remove the MD and let the recorder sit in a warm place to dry. Also, verify that the battery is correctly inserted and charged or replaced if weak. If you pressed a button while the disc indication was rotating quickly, wait until it slows down. If the issue persists after these steps, and the recorder experienced a mechanical shock or power issue, disconnect all power sources for 30 seconds, then reconnect.
S
Sherry WongAug 17, 2025
Why is there no sound coming through my Sony CD Player headphones?
- C
  Cynthia KempAug 17, 2025
  If you're not getting any sound through your headphones, it could be due to a few reasons. First, make sure the headphone plug is firmly connected to the remote control and that the remote control is firmly plugged into the i/LINE OUT. Also, check the volume level and adjust it by pressing VOL +/–. Finally, ensure that AVLS is set to “AVLS OFF”.
A
Ashley GarnerAug 21, 2025
Why does the clock lose time on my Sony Walkman MZ-R91?
- M
  Melissa BauerAug 21, 2025
  If the clock on your Sony CD Player loses time or the display flashes, the built-in battery for the clock may be weak. Connect the AC power adaptor to DC IN 3V on the recorder and the wall outlet to charge the built-in battery. Also ensure that the clock is set.
C
Carol GreerAug 25, 2025
What to do if the rechargeable battery does not start charging on my Sony CD Player?
- A
  Anne McguireAug 25, 2025
  If the rechargeable battery isn't charging, make sure it's correctly inserted and that the AC power adapter is properly connected.
M
Martin HarrisAug 28, 2025
Why CD text information cannot be recorded on my Sony Walkman MZ-R91 CD Player?
- A
  Andrew TaylorAug 28, 2025
  If CD text information cannot be recorded, ensure you are using an optical cable to connect the devices. Also, verify that the connected portable CD player supports CD-TEXT, and that the inserted CD supports CD-TEXT.
B
Brian RodgersSep 1, 2025
What to do if an MD is not played from the first track on my Sony Walkman MZ-R91 CD Player?
- K
  Kimberly Hines MDSep 1, 2025
  If an MD doesn't play from the first track, flip the jog lever (press the control towards . repeatedly on the remote) or open and close the lid once to return to the beginning of the disc. Then, restart playback after verifying the track number in the display.
F
fostertracySep 5, 2025
What to do if cannot find the track marks on my Sony Walkman MZ-R91 CD Player?
- A
  amy45Sep 5, 2025
  If you're having trouble finding track marks, make sure you press X before flipping the jog lever or pressing . or >.
J
Jennifer AndersonSep 8, 2025
Why VOL +/– or DIGITAL MEGA BASS does not work on my Sony Walkman MZ-R91 CD Player?
- J
  Jim MataSep 8, 2025
  If VOL +/– or DIGITAL MEGA BASS isn't working, the “AUDIO OUT” parameter might be set to “LINE OUT”. Change the “AUDIO OUT” parameter to “HeadPhone”.

Summary

Important Warnings and Welcome

Safety Warnings

Essential safety instructions to prevent fire, shock, and eye hazards.

Core Operations and Settings

Using the Jog Lever

Recording an MD Right Away

Connecting for Analog Recording

Steps to connect audio sources via analog line input.

Inserting and Recording an MD

Procedure to insert an MD and start the recording process.

Playing an MD Right Away

Connecting for Playback

Steps to connect headphones and power for audio playback.

Inserting and Playing an MD

Procedure to insert an MD and start playback, adjusting volume.

Diverse Recording Methods

Connecting to Sound Sources

Details on connecting digital and analog audio sources for recording.

Digital Optical Recording Guide

Recording with Optical Cable

Steps for making digital recordings using an optical cable.

Synchro-Recording Functionality

Starting Synchro-Recording

Microphone and Monaural Recording

Recording Using a Microphone

Manual Recording Level Adjustment

Adjusting Recording Level Manually

Guide to manually setting the input audio recording level.

Clock Setting for Time Stamping

Setting the Clock

Procedure to set the internal clock for automatic time stamping.

Playback Modes and Options

Selecting Tracks Directly

Locking Controls (HOLD Function)

Using the HOLD Function

Connecting to Stereo Systems

LINE OUT Connection to Stereo System

Editing Recorded Tracks

Erasing Tracks and Discs

Labeling Recordings

Power Source Management

Charging the Rechargeable Battery

Instructions for charging the supplied nickel metal hydride battery.

Battery Usage and Replacement

Using the Nickel Metal Hydride Battery

Using Dry Batteries

General Precautions and Safety

Device Safety Precautions

Troubleshooting Common Issues

Recorder Not Working or Malfunctioning

Solutions for issues where the recorder fails to operate correctly.

Troubleshooting Recording Problems

Solutions for problems like recording not starting or power interruptions.

Error Messages and Remedies

Interpreting Display Error Messages

Explanation of common error messages and their recommended solutions.

Recorder Control Identification

Recorder Buttons and Jacks Diagram

Sony Walkman MZ-R91 Specifications

General

Category	CD Player
Model	MZ-R91
Type	MiniDisc Recorder/Player
Release Year	1999
Recording Media	MiniDisc
Recording Format	ATRAC
Playback Format	ATRAC
Sampling Frequency	44.1 kHz
Frequency Response	20 Hz - 20 kHz
Charging Time	Approx. 3 hours
Signal-to-Noise Ratio	90 dB
Digital Input	Optical
Digital Output	Optical
Battery Type	AA Alkaline or rechargeable NiMH
Headphone Output	3.5 mm
Included Accessories	Headphones, rechargeable battery, AC adapter, carrying case