Sony MDS-JE630 service manual JIG for Checking BD Board Waveform, Iop

Page 6

JIG FOR CHECKING BD BOARD WAVEFORM

The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows.

GND : Ground

I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser)

IOP

: For measuring IOP (Check the deterioration of the optical pick-up laser)

TEO : TRK error signal (Traverse adjustment)

VC

: Reference level for checking the signal

RF

: RF signal (Check jitter)

Mechanism deck

CN110

6P connector

5P Connector

RF

VC

TEO

IOP

I+3V

GND

 

1

RF

 

RF

 

VC

for

 

 

TEO

MDM-3

VC

 

IOP

 

 

TEO

5

I-3V

 

 

 

 

IOP

1

VC

 

I+3V

 

RF

 

 

TEO

for

 

 

IOP

MDM-5

GND

6

I+3V

 

 

GND

 

– 6 –

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Contents MDM-5D SpecificationsMDS-JE520 MBU-5DSELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Table of Contents DiagramsSection Servicing Notes Flexible Circuit Board Repairing JIG for Checking BD Board Waveform IOPRecord Procedure Checks Prior to Parts Replacement and Adjustments Criteria for Determination Measure if unsatisfactoryRetry Cause Display Mode ProcedureHexadecimal nBinary Conversion Table Section General Location of ControlsFront Panel Rear Panel Page Section Disassembly CaseFront Panel Section Main Board Mechanism Deck Section MDM-5DSlider CAM Base Unit MBU-5D, BD BoardSW BOARD, Loading Motor M103 Setting the Test Mode Section Test ModePrecautions for USE of Test Mode Releasing the Test ModeSelecting the Test Mode Display Contents Mark GroupMID Operating the Continuous Playback ModeNon-Volatile Memory Mode EEP Mode OUTTest Mode Displays Functions of Other ButtonsMeanings of Other Displays Section Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK-UP KMS-260A Laser power meterCheck Prior to Repairs Temperature Compensation Offset CheckLaser Power Check Traverse CheckFocus Bias Check Play Check MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment CD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjustment Location ∙ Signal Path Section DiagramsBlock Diagram Servo Section MDS-JE630Block Diagram Main Section REC AnalogPlay Analog OUT Circuit Boards Location Printed Wiring Board BD Board See page 36 for Circuit Boards LocationSemiconductor Location MDS-JE630 Schematic Diagram BD Board 2/2 See 43 for Waveforms. See page 56 for IC Block DiagramsWaveforms BD Board Schematic Diagram SW BoardPrinted Wiring Board SW Board Main BoardPrinted Wiring Board Main Board See 36 for Circuit Boards Location Semiconductor LocationSchematic 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 IC Block Diagrams BD Board IC101 IC121 CXD2656RIC152 BH6511FS-E2 Main Board IC310 M5293L IC431 LA5632 IC321 AK4524IC471 LB1641 IC PIN Function Description Sens XlatSrdt XrstAsyo XrasXWE AsyiSprd SrdrSfdr SpfdCnvss AderByte RSTLdin STBChack LD-LOWClock SET0 SCLSctx Clock SET117 #1 Section Exploded ViewsChassis Section 12 A-4724-696-A Main BOARD, Complete65 A-4724-698-A Display BOARD, Complete 67 A-4724-697-A KEY SW BOARD, Complete226 206 204 Mechanism Section216 207 203 222 223 225 202 201 209 4-988-466-21 Spring ELECTROSTATIC, LeafBase Unit Section MBU-5D Section Electrical Parts List Display Display HP KEY KEY SW KEY SW Main GP1F38R Digital in OPT1 Ground PlateTC74HCU04AP GP1F38R Digital in OPT2Ferrite Bead Inductor Line FilterMain Power SW SW Accessories & Packing Materials CORD, Connection AudioMANUAL, Instruction ENGLISH, French
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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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