Brand: SHARP
Category: Audio
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for MD-MS722/C/W/MS721W
Uploaded: Nov. 21, 2025, 8:31 p.m.
Manual Publish Date: 1998-01-01
POWER SOURCE
This unit can be used with 4 different power sources: a rechargeable battery, an AC adaptor, a battery case, and a separately available car adaptor (AD-CA20X).Rechargeable battery power
When the rechargeable battery is used for the first time or when you want to use it after a long period of disuse, be sure to charge it fully. 1. Open the rechargeable battery compartment cover. 2. Insert the rechargeable battery. 3. Close the rechargeable battery compartment cover. 4. Plug the AC adaptor into the AC socket, and then insert the plug on the AC adaptor lead into the DC IN 5V socket.CONVENIENT OPERATION OF THE UNIT
Checking the remaining amount of battery charge
The remaining amount of battery charge is shown by the battery indicator () during operation. < How to read the battery indicator > When the battery is completely charged Charging is needed. When the battery needs charging, it is impossible to start recording or editing.RECORDING USING THE OPTICAL DIGITAL CABLE
There are cases where digital recording may be impossible. In the following cases digital recording is impossible, even if you are using digital cables. - When you attempt to make a new digital recording from a track that was digitally recorded on a MiniDiscSound control / Control del sonido
Adjust the volume. From the main unit: Press the + button to increase the volume and the - button to decrease the volume. From the remote control unit: Move the shuttle switch up once to increase the volume, and move it down once to decrease the volume. Adjust the bass level. Each time the BASS button is pressed, the tone will be switched as follows: BASS 1: Bass sounds are emphasized slightly. BASS 2: Bass sounds are emphasized more. BASS 3: Bass sounds are emphasized even more. BASS OFF: Bass emphasis is canceled.Troubleshooting and error codes
| PROBLEM | CAUSE | REMEDY |
|---|---|---|
| The unit does not turn on. | Is the AC adaptor disconnected? | |
| Is the battery exhausted? | ||
| Is the unit in the hold mode? | ||
| Has condensation formed inside the unit? | If this happens, remove the disc. The condensation should evaporate in approximately 1 hour. The unit will then function properly. | |
| Is the unit being influenced by mechanical shock or by static electricity? | ||
| No sound is heard from the earphones. | Is the volume set too low? | |
| Is the remote control unit or the earphones plugged in? | ||
| Are you trying to play a MiniDisc with data on it instead of a MiniDisc containing music? | ||
| When the operation buttons are pressed, the unit does not respond. | Is the unit in the hold mode? | |
| Is the battery exhausted? | ||
| Is the remote control unit plug or the earphone plug inserted firmly? | ||
| Some sounds are skipped. | Is the battery exhausted? | |
| Is the unit being subjected to excessive vibration? | ||
| The MiniDisc cannot be ejected. | Has the track number or character information been written on the disc yet? | |
| Is the unit in the recording or editing mode? | ||
| Is the MiniDisc protected against accidental erasure? | ||
| Recording and editing are impossible. | Is the unit connected properly to the other equipment? | |
| Is the AC adaptor unplugged or did a power failure occur whilst recording or editing? | ||
| Is the unit in the hold mode? | ||
| Is an optical signal being output from the external equipment? Read the operation manual for the external equipment. | ||
| If trouble occurs | When this product is subjected to strong external interference (mechanical shock, excessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is operated incorrectly, it may malfunction. If such a problem occurs, do the following: 1. Unplug the AC adaptor from the AC socket. 2. Remove the battery. 3. Leave the unit completely unpowered for approximately 30 seconds. 4. Plug the AC adaptor back into the AC socket and retry the operation. | If strange sounds, smell or smoke come out of the unit or an object is dropped into the unit, remove the AC adaptor from the AC socket immediately and contact an authorised SHARP service centre. |