Sony MDS-S50 specifications Traverse Adjustment, Iop NV Save

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MDS-JE470

7.Then, rotate the lAMS L knob and display “LDPWR CHECK”.

8. Press the YES button once and display “LD 0.9 mW $ ”. Check that the reading of the laser power meter become the speci- fied value.

9.Press the YES button once more and display “LD 7.0 mW $

”. Check that the reading the laser power meter and digital volt meter satisfy the specified value.

Note down the digital voltmeter reading value.

Specified Value :

Laser power meter reading : LD 0.9mW : 0.85-0.91mW (260B) 0.90-0.96mW (260E)

LD 7.0mW : 6.90-7.10mW (260B) 7.20-7.30mW (260E)

Digital voltmeter reading : Optical pick-up displayed value ± 10%

(Optical pick-up label)

KMS260B

(For details of the method for checking

20101

this value, refer to “5-8. Recording and

Displaying IOP Information”.)

H0576

 

 

 

R

 

Iop = 57.6 mA in this case

Iop (mA) = Digital voltmeter reading (mV)/1 (Ω)

10.Press the MENU/NO button and display “LDPWR CHECK” and stop the laser emission.

(The MENU/NO button is effective at all times to stop the laser emission.)

11.Rotate the lAMS L knob to display “Iop.Write”.

12.Press the YES button. When the display becomes Ref = @@@

.@ (@ is an arbitrary number), press the YES button to display “Measu=@@@.@” (@ is an arbitrary number).

13.The numbers which can be changed will blink. Input the Iop value noted down at step 9.

To select the number : Rotate the lAMS L knob.

To select the digit : Press the lAMS L knob

14.When the YES button is pressed, “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write”.

Note 1: After step 4, each time the YES button is pressed, the display will be switched between “LD 0.7 mW $ ”, “LD

6.2mW $ ”, and “LD Wp $ ”. Nothing needs to be performed here.

5-11. Iop NV SAVE

Write the reference values in the nonvolatile memory to perform “Iop compare”. As this involves rewriting the reference values, do not perform this procedure except when adjusting the laser power during replacement of the OP and when replacing the IC102. Otherwise the OP check may deteriorate.

Note: Perform this function with the optical pick-up set at room temperature.

Procedure

1.Rotate the l AMS L knob to display “Iop NV Save” (C06).

2.Press the YES button and display “Iop [stop]”.

3.After the display changes to “Iop =xxsave?”, press the YES button.

4.After “Complete!” is displayed momentarily, the display changes to “Iop 7.0 mW”.

5.After the display changes to “Iop=yysave?”, press the YES button.

6.When “Complete!” is displayed, it means that Iop NV saving has been completed.

5-12. TRAVERSE ADJUSTMENT

Connection :

Oscilloscope

BD board

CN105 pin 4 (TE)

CN105 pin 6 (VC)

V : 0.5 V/div

H : 10 ms/div

Input : DC mode

Adjusting Procedure :

1.Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) of the BD board.

2.Load a test disc (MDW-74/GA-1). (Refer to Note 1.)

3.Press the M button and move the optical pick-up outside the pit.

4.Rotate the l AMS L knob and display “EF MO AD- JUST”.

5.Press the YES button and display “EFB = MO-R”.

(Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)

6.Rotate the lAMS L knob so that the waveform of the oscilloscope becomes the specified value.

(When the lAMS L knob is rotated, the of “EFB=

” changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the wave- form so that the specified value is satisfied as much as possible. (Read power traverse adjustment)

(Traverse Waveform)

A

VC

B

Specification A = B

7.Press the YES button and save the result of adjustment to the non-volatile memory (“EFB = SAVE” will be displayed for a moment. Then “EFB = MO-W” will be displayed).

8.Rotate the lAMS L knob so that the waveform of the oscilloscope becomes the specified value.

(When the lAMS L knob is rotated, the of “EFB- MO-W” changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the wave- form so that the specified value is satisfied as much as possible. (Write power traverse adjustment)

(Traverse Waveform)

A

VC

B

Specification A = B

9.Press the YES button, and save the adjustment results in the non-volatile memory. (“EFB = SAVE” will be displayed for a moment.)

10.“EFB = MO-P”. will be displayed.

The optical pick-up moves to the pit area automatically and servo is imposed.

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Contents Specifications 873-891-11Three- or five Digit code Cause/Remedy Message MDS-JE470SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Table of Contents DisassemblyDiagrams Exploded ViewsMDS-JE470 Section Service Notes Safety CHECK-OUTFlexible Circuit Board Repairing LeakageJIG for Checking BD Board Waveform IOPRecord Precedure KSN-260E Optical PICK-UP Block Type DiscriminationMain Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset Retry Cause Display Mode Bit BinaryHexadecimal Binary Bit When BinaryHigher Bits Lower Bits Hexa Details 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 MDS-JE470 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode DisplayOperating the Continuous Playback Mode MENU/NOTest Mode Displays Mode displayError rate display Functions of Other ButtonsWhen Memory NG is Displayed Meanings of Other DisplaysAutomatic SELF-DIAGNOSIS Function InformationCheck before replacement MDS-JE470 Section Electrical AdjustmentsParts Replacement and Adjustment Adjustment flow Precautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B/260E Using the Continuously Recorded Disc Checks Prior to RepairsAuto Check Other ChecksTraverse Check Traverse WaveformPlay Check MO Error Rate Check CD Error Rate CheckFocus Bias Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Traverse Adjustment Iop NV SaveFocus Bias Adjustment Error Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points MDS-JE470 Section Diagrams Circuit Boards LocationFor schematic diagrams For printed wiring boardsBD Board Main BoardIC190 Block Diagrams BD SectionIC171 IC1 2/2 Main SectionIC360 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 Pin No Pin Name Description IC PIN Function DescriptionIC101 CXA2523AR RF Amplifier BD Board 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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