Sony MDS-S50 specifications Mvci

Page 54

MDS-JE470

Pin No.

Pin Name

I/O

Description

 

 

 

 

48

D1

I/O

 

 

 

 

 

49

D0

I/O

Data input/output for DRAM

 

 

 

 

50, 51

D2, D3

I/O

 

 

 

 

 

52

MVCI

I (S)

Clock input from an external VCO (Fixed at “L”)

 

 

 

 

53

ASYO

O

Playback EFM duplex signal output

 

 

 

 

54

ASYI

I (A)

Playback EFM comparator slice level input

 

 

 

 

55

AVDD

I

+3V power supply (Analog)

 

 

 

 

56

BIAS

I (A)

Playback EFM comparator bias current input

 

 

 

 

57

RFI

I (A)

Playback EFM RF signal input

 

 

 

 

58

AVSS

—

Ground (Analog)

 

 

 

 

59

PCO

O (3)

Phase comparison output for the recording/playback EFM master PLL

 

 

 

 

60

FILI

I (A)

Filter input for the recording/playback EFM master PLL

 

 

 

 

61

FILO

O (A)

Filter output for the recording/playback EFM master PLL

 

 

 

 

62

CLTV

I (A)

Internal VCO control voltage input for the recording/playback EFM master PLL

 

 

 

 

63

PEAK

I (A)

Light amount signal peak hold input from the CXA2523AR

 

 

 

 

64

BOTM

I (A)

Light amount signal bottom hold input from the CXA2523AR

 

 

 

 

65

ABCD

I (A)

Light amount signal input from the CXA2523AR

 

 

 

 

66

FE

I (A)

Focus error signal input from the CXA2523AR

 

 

 

 

67

AUX1

I (A)

Auxiliary A/D input

 

 

 

 

68

VC

I (A)

Middle point voltage (+1.5V) input from the CXA2523AR

 

 

 

 

69

ADIO

O (A)

Monitor output of the A/D converter input signal (Not used)

 

 

 

 

70

AVDD

I

+3V power supply (Analog)

 

 

 

 

71

ADRT

I (A)

A/D converter operational range upper limit voltage input (Fixed at “H”)

 

 

 

 

72

ADRB

I (A)

A/D converter operational range lower limit voltage input (Fixed at “L”)

 

 

 

 

73

AVSS

—

Ground (Analog)

 

 

 

 

74

SE

I (A)

Sled error signal input from the CXA2523AR

 

 

 

 

75

TE

I (A)

Tracking error signal input from the CXA2523AR

 

 

 

 

76

DCHG

I (A)

Connected to +3V power supply

 

 

 

 

77

TEST4

I

Test input (Fixed at “H”)

 

 

 

 

78

ADFG

I (S)

ADIP duplex FM signal input from the CXA2523AR (22.05 ± 1 kHz)

 

 

 

 

79

F0CNT

O

Filter f0 control output to the CXA2523AR

 

 

 

 

80

XLRF

O

Control latch output to the CXA2523AR

 

 

 

 

81

CKRF

O

Control clock output to the CXA2523AR

 

 

 

 

82

DTRF

O

Control data output to the CXA2523AR

 

 

 

 

83

APCREF

O

Reference PWM output for the laser APC

 

 

 

 

84

TEST0

O

PWM output for the laser digital APC (Not used)

 

 

 

 

85

TRDR

O

Tracking servo drive PWM output (–)

 

 

 

 

•Abbreviation

EFM: Eight to Fourteen Modulation

PLL : Phase Locked Loop

VCO: Voltage Controlled Oscillator

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Contents Specifications 873-891-11MDS-JE470 SELF-DIAGNOSIS FunctionThree- or five Digit code Cause/Remedy Message Items of Error History Mode Items and Contents Diagrams Table of ContentsDisassembly Exploded ViewsFlexible Circuit Board Repairing MDS-JE470 Section Service NotesSafety CHECK-OUT LeakageJIG for Checking BD Board Waveform IOPRecord Precedure KSN-260E Optical PICK-UP Block Type DiscriminationChecks Prior to Parts Replacement and Adjustments Forced ResetMain Board Component Side Retry Cause Display Mode Bit BinaryBit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary MDS-JE470 Section General Button DescriptionsMDS-JE470 Section Disassembly Disassembly FlowFront Panel Section Main Board PT BOARD, VOL-SEL Board SP modelMechanism Deck Section MDM-7A Over Light Head HR901, BD BoardHolder Assy Loading Motor Assy M103Sled Motor Assy M102, Slider Optical PICK-UPSpindle Moter Assy M101 Setting the Test Mode MDS-JE470 Section Test ModePrecautions for USE of Test Mode Exiting the Test ModeSelecting the Test Mode DisplayOperating the Continuous Playback Mode MENU/NOError rate display Test Mode DisplaysMode display Functions of Other ButtonsAutomatic SELF-DIAGNOSIS Function When Memory NG is DisplayedMeanings of Other Displays 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 Using the Continuously Recorded Disc Checks Prior to RepairsTraverse Check Auto CheckOther Checks Traverse WaveformFocus Bias Check Play Check MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Traverse Adjustment Iop NV SaveFocus Bias Adjustment CD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points MDS-JE470 Section Diagrams Circuit Boards LocationBD Board For schematic diagramsFor printed wiring boards Main BoardBlock Diagrams BD Section IC171IC190 Main Section IC360 2/2IC1 2/2 SemiconductorOVER SemiconductorBoard Board Main Display Board Schematic Diagram Main /2 See page 51 for IC Block DiagramsIC1 KEY-SW Board Schematic Diagram Display Section Indicator TubePT Board 230VSchematic Diagram Power Section IC Block Diagrams IC101 CXA2523AR BD BoardIC500 AK4524 Main Board IC PIN Function Description IC101 CXA2523AR RF Amplifier BD BoardPin No Pin Name Description Pin No Pin Name Desription SqsyMvci Abbreviation EFM Eight to Fourteen Modulation IC1 M30803MG-107FP System Control Main Board ADA. Latch STB Section Exploded Views Chassis SectionFL750 Mechanism MDM-7A M101 Electrical Parts List CoilsMetal Chip Display MDS-JE470 KEY-SW MainMDS-JE470 Main CN2TC7WHU04FUTE12R MDS-JE470 Main VOL-SEL Screw +KTP 2X6 TYPE2 NON-SLITMDS-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.
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