Kenwood MD-R2 Troubleshooting, Types of discs, High-speedaccess, Shock Resistant Memory

Models: MD-R2

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■Types of discs

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Types of discs

There are two types of discs: playback-only and recordable type.

Playback-only MiniDisc:

This type of MiniDisc is used for commercially available pre-recorded music. This is the same kind of optical disc as CDs. Playback is performed using an optical pickup. (Recording and editing are not possible.)

A shutter will be used on only one side (back).

Recordable MiniDisc:

This is a “raw disc” on which recording can be performed. A magneto optical disc is used.

Recordings are made using a laser and magnetic field. Repeated recording is possible.

Shutters will be used on both sides.

High-speed access

A unique feature of the MiniDisc is the ability to locate the beginning of a desired track at high speed.

This is because the track number and track name data is stored in a TOC (Table of Contents).

Disc

TOC

Sound data

Shock Resistant Memory

During playback, approximately 10 seconds of information is stored in the semiconductor memory. Therefore, even when the pickup cannot read information for a second or two due to an external shock, the sound continues without interruption because the information stored in memory is output.

TROUBLESHOOTING

Moisture condensation

In the following cases, condensation may form inside the unit.

Shortly after turning on a heater.

When the unit is placed in a room where there is exces- sive steam or moisture.

When the unit is moved from a cool place to a warm place.

When the unit has condensation inside, the disc signals cannot be read, and the product may not function properly.

If this happens, remove the disc, and open the disc holder. The condensation should evaporate in ap- proximately 1 hour. The unit will then function properly.

If a power failure occurs during recording

If the AC power plug is disconnected from the AC outlet or a power failure occurs during recording (before the TOC information has been recorded on the disc), the audio portion being recorded at that time will be erased. When a recording is being added to a MiniDisc which already has a recording on it, if the TOC is not updated before the power failure, the added recording will be erased.

If a power failure occurs or the AC power cord is dis- connected for about 10 minutes, when power is restored, TOC will be written on the disc.

If a problem occurs

If this product is subjected to strong external inter- ference (mechanical shock, excessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is operated incorrectly, it may malfunction or the display may not function correctly. If such a problem occurs, do the following:

Unplug the AC power cord from the AC outlet.

Wait about 20 - 30 seconds and then plug the AC power lead back into the AC outlet.

Press the reset button on the back of the unit.

■High-speed access■Shock Resistant Memory RESET

Pen, pencil, etc.

When the reset button is pressed, all of the settings in memory will be erased.

If strange sounds, smells or smoke come out of the unit or if a foreign object falls into the unit, turn off the power, unplug the AC power cord from the AC outlet, immedi- ately. Contact your nearest authorized Sharp servicer.

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MD-R2

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Kenwood MD-R2 Troubleshooting, Types of discs, High-speedaccess, Shock Resistant Memory, Moisture condensation, Continued