Sony MDS-S50 specifications Selecting the Test Mode, Display

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MDS-JE470

4-5. SELECTING THE TEST MODE

There are 26 types of test modes as shown below. The groups can be switched by rotating the lAMS L knob. After selecting the group to be used, press the YES button. After setting a certain group, rotating the lAMS L knob switches between these modes. Refer to “Group” in the table for details selected.

All adjustments and checks during servicing can be performed in the test mode in the Service group.

NOTE: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally.

If the [Develop] group is set accidentally, press the

MENU/NO button immediately to exit the [Develop] group.

Display

AUTO CHECK

Err Display

TEMP ADJUS

LDPWR ADJUS

Iop Write

Iop NV Save

EF MO ADJUS

EF CD ADJUS

FBIAS ADJUS

AG Set (MO)

AG Set (CD)

TEMP CHECK

LDPWR CHECK

EF MO CHECK

EF CD CHECK

FBIAS CHECK

ScurveCHECK

VERIFYMODE

DETRK CHECK

0920 CHECK

Iop Read

Iop Compare

ADJ CLEAR

INFORMATION

CPLAY1MODE

CREC 1MODE

Group

No.

Details

Mark

Check

Service

C01 Automatic self-diagnosis

C02 Error history display, clear

C03 Temperature compensation offset adjustment

C04 Laser power adjustment

C05 Iop data writing

C06 Writes current Iop value in read nonvolatile memory using microprocessor

C07 Traverse (MO) adjustment

C08 Traverse (CD) adjustment

C09 Focus bias adjustment

C10 Focus, tracking gain adjustment (MO)

C11 Focus, tracking gain adjustment (CD)

C12 Temperature compensation offset check

C13 Laser power check

C14 Traverse (MO) check

C15 Traverse (CD) check

C16 Focus bias check

C17 S-curve check

C18 Nonvolatile memory check

C19 Detrack check

C25 Most circumference check

C26 Iop data display

C27 Comparison with initial Iop value written in nonvolatile memory

C28 Initialization of nonvolatile memory for adjustment values

C31 Display of microprocessor version, etc.

C34 Continuous playback mode

C35 Continuous recording mode

For details of each adjustment mode, refer to “5. Electrical Adjustments”. For details of “Err Display”, refer to “Self-Diagnosis Function” on page 2.

If a different mode has been selected by mistake, press the MENU/NO button to exit that mode.

Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set acciden- tally, press the MENU/NO button to exit the mode immediately.

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Contents 873-891-11 SpecificationsMDS-JE470 SELF-DIAGNOSIS FunctionThree- or five Digit code Cause/Remedy Message Items of Error History Mode Items and Contents Disassembly Table of ContentsDiagrams Exploded ViewsSafety CHECK-OUT MDS-JE470 Section Service NotesFlexible Circuit Board Repairing LeakageIOP JIG for Checking BD Board WaveformRecord Precedure Optical PICK-UP Block Type Discrimination KSN-260EChecks Prior to Parts Replacement and Adjustments Forced ResetMain Board Component Side Bit Binary Retry Cause Display ModeBit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary Button Descriptions MDS-JE470 Section GeneralDisassembly Flow MDS-JE470 Section DisassemblyFront Panel Section PT BOARD, VOL-SEL Board SP model Main BoardOver Light Head HR901, BD Board Mechanism Deck Section MDM-7ALoading Motor Assy M103 Holder AssyOptical PICK-UP Sled Motor Assy M102, SliderSpindle Moter Assy M101 Precautions for USE of Test Mode MDS-JE470 Section Test ModeSetting the Test Mode Exiting the Test ModeDisplay Selecting the Test ModeMENU/NO Operating the Continuous Playback ModeMode display Test Mode DisplaysError rate display Functions of Other ButtonsMeanings of Other Displays When Memory NG is DisplayedAutomatic SELF-DIAGNOSIS Function InformationMDS-JE470 Section Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement Adjustment flow Precautions for Checking Laser Diode Emission Precautions for USE of Optical PICK- UP KMS-260B/260EPrecautions for Adjustments Checks Prior to Repairs Using the Continuously Recorded DiscOther Checks Auto CheckTraverse Check Traverse WaveformCD Error Rate Check Play Check MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Iop NV Save Traverse AdjustmentFocus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Circuit Boards Location MDS-JE470 Section DiagramsFor printed wiring boards For schematic diagramsBD Board Main BoardBlock Diagrams BD Section IC171IC190 Main Section IC360 2/2IC1 2/2 Semiconductor SemiconductorOVERBoard Board Main Display Board See page 51 for IC Block Diagrams Schematic Diagram Main /2IC1 KEY-SW Board Indicator Tube Schematic Diagram Display Section230V PT BoardSchematic Diagram Power Section IC101 CXA2523AR BD Board IC Block DiagramsIC500 AK4524 Main Board IC PIN Function Description IC101 CXA2523AR RF Amplifier BD BoardPin No Pin Name Description Sqsy Pin No Pin Name DesriptionMvci Abbreviation EFM Eight to Fourteen Modulation IC1 M30803MG-107FP System Control Main Board ADA. Latch STB Chassis Section Section Exploded ViewsFL750 Mechanism MDM-7A M101 Coils Electrical Parts ListMetal Chip MDS-JE470 KEY-SW Main DisplayCN2 MDS-JE470 MainTC7WHU04FUTE12R Screw +KTP 2X6 TYPE2 NON-SLIT MDS-JE470 Main VOL-SELMDS-JE470 MDS-JE470 Revision History

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.