MDS-JE470

5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION

To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.

5-3. PRECAUTIONS FOR USE OF OPTICAL PICK- UP (KMS-260B/260E)

As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connect- ing the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.

pick-up

flexible board

 

laser tap

Optical pick-up flexible board

5-4. PRECAUTIONS FOR ADJUSTMENTS

1)When replacing the following parts, perform the adjustments and checks with in the order shown in the following table.

2)Set the test mode when performing adjustments. After completing the adjustments, exit the test mode.

Perform the adjustments and checks in “group S” of the test mode.

3)Perform the adjustments to be needed in the order shown.

4)Use the following tools and measuring devices.

Check Disc (MD) TDYS-1 (Parts No. 4-963-646-01)

Test Disk (MDW-74/GA-1) (Parts No. 4-229-747-01)

Laser power meter LPM-8001 (Parts No. J-2501-046-A)

or

MD Laser power meter 8010S (Parts No. J-2501-145-A)

Oscilloscope (Measure after performing CAL of prove.)

Digital voltmeter

Thermometer

Jig for checking BD board waveform (Parts No. : J-2501-196-A)

5)When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscillo- scope.

(VC and ground will become short-circuited.)

6)Using the above jig enables the waveform to be checked with- out the need to solder.

(Refer to Servicing Note on page 6.)

7)As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.

 

 

 

 

Parts to be replaced

 

 

 

Adjustment

 

 

 

 

 

 

 

Optical

IC101

IC102

IC151

IC190

IC195

D101

 

Pick-up

 

 

 

 

 

 

 

5-7. Initial setting of adjustment values

5-8. Recording of Iop information

5-9. TEMP ADJUST

5-10. Laser power adjustment

5-11. Iop NV Save

5-12. Traverse adjustment

5-13. Focus bias adjustment

5-16. Auto gain adjustment

5-6-4. AUTO CHECK

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Sony MDS-S50 Precautions for Checking Laser Diode Emission, Precautions for USE of Optical PICK- UP KMS-260B/260E

MDS-S50 specifications

The Sony MDS-S50 is a pinnacle of MiniDisc technology, offering audiophiles a compact and reliable way to enjoy high-quality audio. Launched in the early 2000s, it epitomizes the innovation that Sony was known for during this period, combining functionality with sleek design.

One of the primary features of the MDS-S50 is its ability to record in SP (Standard Play) mode, which delivers high-resolution audio at 64 kbps, and LP (Long Play) mode for extended recording times. This flexibility makes it suitable for various listening preferences, whether for critical listening or casual playback during everyday activities. The device harnesses the precision of digital audio encoding, ensuring minimal loss of sound quality.

The MDS-S50 stands out with its direct digital recording capabilities. By connecting to external audio sources via optical or coaxial digital inputs, users can preserve the integrity of the original sound. This feature is particularly appealing for those who want to capture live recordings or transfer vinyl records and CDs to the MiniDisc format without degradation.

The inclusion of a user-friendly interface, with an intuitive remote control and well-organized menu systems, enhances the experience for users. The display panel gives clear information on track titles, remaining recording time, and other essential details, allowing for seamless navigation through complex playlists or recording options.

Another notable technology in the MDS-S50 is the ATRAC (Adaptive Transform Acoustic Coding) compression algorithm, developed by Sony. This proprietary encoding format optimizes sound quality while significantly reducing file sizes. The result is a perfect balance between audio fidelity and efficient storage, which was a major advantage during the era of burgeoning digital music.

Furthermore, the MDS-S50 boasts a durable build quality, designed to withstand transport and everyday use. Its compact size, combined with lightweight materials, allows users to take it on the go while not compromising on audio quality.

Ultimately, the Sony MDS-S50 remains a beloved device among music enthusiasts. With its combination of high-quality recording capabilities, advanced digital encoding technology, and user-friendly features, it represents a unique chapter in the evolution of portable audio. Whether used as a standalone player or part of a larger audio setup, it delivers a level of performance that still resonates with those who appreciate the art of music.