Sony MDS-JE630 Focus Bias Check, Play Check MO Error Rate Check, CD Error Rate Check

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9.Press the [YES] button to display “EFB = MO-P”.

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

10.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob.

Traverse Waveform

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

11.Press the [YES] button to display “EF MO CHECK” The disc stops rotating automatically.

12.Press the [ÊÊÊÊÊEJECT]¤ button and take out the disc.

13.Load the check disc (MD) TDYS-1.

14.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob and display “EF CD CHECK” (C04).

15.Press the [YES] button to display “EFB = CD”. Servo is imposed automatically.

16.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob.

Traverse Waveform

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

17.Press the [YES] button to display “EF CD CHECK”.

18.Press the [ÊÊÊÊÊEJECT]¤ button and take out the check disc.

6-4. Focus Bias Check

Change the focus bias and check the focus tolerance amount.

Checking Procedure :

1.Load the test disk (MDW-74/AU-1).

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “CPLAY MODE” (C30).

3.Press the [YES] button twice to display “CPLAY MID”.

4.Press the [MENU/NO] button when “C = AD = ” is displayed.

5.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “FBIAS CHECK” (C05).

6.Press the [YES] button to display “ / c = ”.

The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value.

Check that the C1 error is below 50 and ADER is below 2.

7.Press the [YES] button to display “ / b = ”.

Check that the C1 error is about 200 and ADER is below 2.

8.Press the [YES] button to display “ / a = ”.

Check that the C1 error is about 200 and ADER is below 2.

9.Press the [MENU/NO] button, then press the [ÊÊÊÊÊEJECT]¤ but- ton and take out the test disc.

6-5. C PLAY Check

MO Error Rate Check

Checking Procedure :

1.Load the test disk (MDW-74/AU-1).

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “CPLAY MODE” (C30).

3.Press the [YES] button to display “CPLAY MID”.

4.The display changes to “C = AD = ”.

5.If the C1 error rate is below 80, check that ADER is below 2.

6.Press the [MENU/NO] button to stop playback, then press the [ÊÊÊÊÊEJECT]¤ button and take out the test disc.

CD Error Rate Check

Checking Procedure :

1.Load the check disc (MD) TDYS-1.

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “CPLAY MODE” (C30).

3.Press the [YES] button twice to display “CPLAY MID”.

4.The display changes to “C = AD = ”.

5.Check that the C1 error rate is below 50.

6.Press the [MENU/NO] button to stop playback, then press the [ÊÊÊÊÊEJECT]¤ button and take out the check disc.

6-6. Self-Recording/playback Check

Prepare a continuous recording disc using the unit to be repaired and check the error rate.

Checking Procedure :

1.Load a recordable disc (blank disc).

2.Turn the [ÊÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊÊ]- ± knob to display “CREC MODE” (C31).

3.Press the [YES] button to display “CREC MID”.

4. When recording starts, light up “ REC ” and display “CREC

@@@@” (@@@@ is the address).

5.About 1 minute later, press the [MENU/NO] button to stop continuous recording.

6.Turn the [ÊÊÊÊÊÊÊAMSÊÊÊÊÊÊÊ]- ± knob to display “CPLAY MODE” (C30).

7.Press the [YES] button to display “CPLAY MID”.

8.“C = AD = ” will be displayed.

9.Check that the C1 error becomes below 80 and the AD error below 2.

10.Press the [MENU/NO] button to stop playback, then press the [ÊÊÊÊÊEJECT]¤ button and take out the disc.

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Contents MDS-JE520 SpecificationsMDM-5D MBU-5DSELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Diagrams Table of ContentsSection Servicing Notes Flexible Circuit Board Repairing IOP JIG for Checking BD Board WaveformRecord Procedure Criteria for Determination Measure if unsatisfactory Checks Prior to Parts Replacement and AdjustmentsProcedure Retry Cause Display ModeHexadecimal nBinary Conversion Table Location of Controls Section GeneralFront Panel Rear Panel Page Case Section DisassemblyFront Panel Section Mechanism Deck Section MDM-5D Main BoardBase Unit MBU-5D, BD Board Slider CAMSW BOARD, Loading Motor M103 Precautions for USE of Test Mode Section Test ModeSetting the Test Mode Releasing the Test ModeDisplay Contents Mark Group Selecting the Test ModeNon-Volatile Memory Mode EEP Mode Operating the Continuous Playback ModeMID OUTFunctions of Other Buttons Test Mode DisplaysMeanings of Other Displays Parts Replacement and Adjustment Section Electrical AdjustmentsPrecautions for USE of Optical PICK-UP KMS-260A Precautions for Checking Laser Diode EmissionPrecautions for Adjustments Laser power meterLaser Power Check Temperature Compensation Offset CheckCheck Prior to Repairs Traverse CheckCD Error Rate Check Play Check MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckTemperature Compensation Offset Adjustment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjustment Location Block Diagram Servo Section Section Diagrams∙ Signal Path MDS-JE630REC Analog Block Diagram Main SectionPlay Analog OUT Circuit Boards Location See page 36 for Circuit Boards Location Printed Wiring Board BD BoardSemiconductor Location MDS-JE630 43 for Waveforms. See page 56 for IC Block Diagrams Schematic Diagram BD Board 2/2 SeePrinted Wiring Board SW Board Schematic Diagram SW BoardWaveforms BD Board Main Board36 for Circuit Boards Location Semiconductor Location Printed Wiring Board Main Board SeeSchematic Diagram Main Board 1/2 See page 43 for Waveforms Line with mark !are critical for safety Ref. No Location D757 IC761 IC771 Q757 Q781 Q782 Schematic Diagram Panel Section See page 43 for Waveform IC121 CXD2656R IC Block Diagrams BD Board IC101IC152 BH6511FS-E2 IC321 AK4524 Main Board IC310 M5293L IC431 LA5632IC471 LB1641 IC PIN Function Description Srdt XlatSens XrstXWE XrasAsyo AsyiSfdr SrdrSprd SpfdByte AderCnvss RSTChack STBLdin LD-LOWSctx SCLClock SET0 Clock SET1Chassis Section Section Exploded Views17 #1 12 A-4724-696-A Main BOARD, Complete67 A-4724-697-A KEY SW BOARD, Complete 65 A-4724-698-A Display BOARD, Complete216 207 203 222 223 225 202 201 Mechanism Section226 206 204 209 4-988-466-21 Spring ELECTROSTATIC, LeafBase Unit Section MBU-5D Section Electrical Parts List Display Display HP KEY KEY SW KEY SW Main TC74HCU04AP Ground PlateGP1F38R Digital in OPT1 GP1F38R Digital in OPT2Line Filter Ferrite Bead InductorMain Power SW SW CORD, Connection Audio Accessories & Packing MaterialsMANUAL, Instruction ENGLISH, French
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Manual 61 pages 6.43 Kb

MDS-JE630 specifications

The Sony MDS-JE630 is a compact and versatile MiniDisc recorder that was launched in the late 1990s, showcasing Sony's commitment to portable digital audio technology. Renowned for its superior sound quality, the MDS-JE630 is an exceptional choice for audiophiles and professionals alike, offering a user-friendly interface and a range of advanced features.

One of the main highlights of the MDS-JE630 is its MDLP (MiniDisc Long Play) technology, which allows for extended recording time without sacrificing audio quality. This feature enables users to record up to 148 minutes of stereo sound on a single MiniDisc, making it an invaluable tool for those requiring longer recording sessions, such as musicians or radio broadcasters.

The MDS-JE630 is equipped with ATRAC (Adaptive Transform Acoustic Coding) compression algorithms, ensuring that audio files retain high fidelity even when compressed. The device features a 20-bit digital-to-analog converter, providing remarkable sound clarity and depth. Users can expect crisp highs and robust lows, making every listening experience engaging and immersive.

Ease of use is another hallmark of the MDS-JE630. The front panel includes an intuitive layout, featuring a large LCD display that clearly shows current track information, time elapsed, and other playback indicators. Additionally, the unit offers various playback modes such as normal, repeat, and shuffle, allowing users to customize their listening experience.

The recording process on the MDS-JE630 is seamless, thanks to its one-touch recording feature. Users can easily initiate recordings from connected sources, including CD players or turntables, via the device's multiple inputs, such as line-in and optical digital inputs. This adaptability makes it a versatile component for any audio setup, whether for home studios or live performances.

Moreover, the MDS-JE630 incorporates a variety of editing functions, including track arranging, dividing, and merging, providing users with the ability to create perfectly curated audio collections. The device also supports a wide range of MiniDisc formats, ensuring compatibility with existing media.

In conclusion, the Sony MDS-JE630 stands out as a premier MiniDisc recorder, offering a blend of advanced technology, user-friendly design, and high-quality playback. Its innovative features and commitment to sound quality have made it a popular choice for music professionals and enthusiasts, solidifying its reputation as a reliable audio recording solution for years to come.
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