Sony MDS-PC2 service manual Checks Prior to Parts Replacement and Adjustments, Rec/Play

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CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

 

Criteria for Determination

Measure if unsatisfactory:

 

(Unsatisfactory if specified value is not satisfied)

 

 

 

 

 

Laser power check

• 0.9 mW power

• Clean the optical pick-up

(5-6-2 : See page 37)

Specified value : 0.84 to 0.92 mW

• Adjust again

 

• 7.0 mW power

• Replace the optical pick-up

 

Specified value : 6.8 to 7.2 mW

 

 

lop (at 7mW)

• Replace the optical pick-up

 

• Labeled on the optical pickup

 

 

Iop value ± 10mA

 

 

 

 

Traverse check

• Traverse waveform

• Replace the optical pick-up

(5-6-3 : See page 37)

Specified value : Below 10% offset

 

Focus bias check

• Error rate check

• Replace the optical pick-up

(5-6-4 : See page 38)

Specified value : For points a, b, and c

 

 

C1 error : Below 220

 

 

AD error : Below 2

 

C PLAY check

• Error rate check

• Replace the optical pick-up

(5-6-5 : See page 38)

Specified value:

 

 

a. When using test disc (MDW-74/AU-1)

 

 

C1 error : Below 80

 

 

AD error : Below 2

 

 

b.When using check disc (TDYS-1)

 

 

C1 error : Below 50

 

Self-recording/playback

• CPLAY error rate check

If always unsatisfactory:

check

Specified value:

• Replace the overwrite head

(REC/PLAY)

C1 error : Below 80

• Check for disconnection of the circuits around the

(5-6-6 : See page 38)

AD error : Below 2

overwrite head

 

 

If occasionally unsatisfactory:

 

 

• Check if the overwrite head is distorted

 

 

• Check the mechanism around the sled

TEMP check

• Unsatisfactory if displayed as T=@@ (##) [NG”

• Check for disconnection of the circuits around D101

(Temperature

NG

(BD board)

compensation

(@@, ## are both arbitrary numbers)

• Check the signals around IC101, IC121, CN102,

offset check)

 

CN103 (BD board)

(5-6-1 : See page 37)

 

 

 

 

 

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.

When performing adjustments, use the specified values for adjustments.

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Contents Specifications MDM-5AProgram SELF-DIAGNOSIS FunctionInput Items of Error History Mode Items and Contents Flexible Circuit Board Repairing Parts NoTable of Contents DisassemblyDiagrams Exploded ViewsSection Servicing Note JIG for Checking BD Board WaveformIOP TEORecord Precedure REC/PLAY Checks Prior to Parts Replacement and AdjustmentsCriteria for Determination Measure if unsatisfactory Power Board Component Side Forced ResetFluorescent Display Tube ALL Lighting and KEY Check Mode Retry Cause Display Mode Higher Bits Lower Bits HexaCause of Retry Occurring conditions Bit BinaryHexadecimal Binary Bit When BinaryHigher Bits Lower Bits Hexa Details Section General Front PanelMD Mechanism Section DisassemblyCase and Front Panel Slider CAM Base Unit MBU-5A and BD BoardSW Board and Loading Motor M103 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode GroupOperating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeMID OUTTest Mode Displays Functions of Other ButtonsMeanings of Other Displays Section Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Checking Laser Diode Emissinon Precautions for USE of Optical PICK- UP KMS-260APrecautions for Adjustments Creating Continuously Recorded DiscTemperature Compensation Offset Check Laser Power CheckChecks Prior to Repairs Specified ValuePlay Checking MO Error Rate Check CD Error Rate CheckFocus Bias Check EjectInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment 6EJECTError 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 BD Board Side BSection Diagrams Circuit Boards LocationBlock Diagram BD Section MDS-PC2PB Digital out REC DigitalMain Section LD-LOVOWaveforms Panel SectionPrinted Wiring Board BD Section See page 30 for Circuit Boards LocationSchematic Diagram BD 1/2 Section Schematic Diagram BD 2/2 Section Schematic Diagram Main 1/2 Section Board Schematic Diagram Main 2/2 SectionPanel BD Board Panel Printed Wiring Board Main SectionPower Schematic Diagram Panel Section Printed Wiring Board Panel Section Main BoardSchematic Diagram Power Section Printed Wiring Board Power Section Main Board BD BoardBD section IC101 CXA2523AR Schematic Diagram BD Switch Section IC Block DiagramPrinted Wiring Board BD Switch Section IC121 CXD2654R IC152 BH6511FS-E2Main section IC301 UDA1341TS/N2 IC441 LB1830MPin No Pin Name Function IC PIN FunctionsIC101 RF Amplifier CXA2523AR BD board MNT0 FOK MNT1 ShckMNT2 Xbusy MNT3 SlocMvci AsyoAsyi AvddTfdr FfdrFrdr FS4IC501 System Control M30620MC-406FP Main board OPT SEL Mode SEL PB-PREC/PB SDACabinet Section CORD, Power UKSection Exploded Views Mechanism Section MDM-5A Insulator F509 4-988-466-21 Spring ELECTROSTATIC, Leaf 526 A-4680-417-A Holder Complete AssyMotor ASSY, Sled Base Unit Section MBU-5AHEAD, Over Light Back UP Section Electrical Parts List Main CONNECTOR, FFC 15P ElectGround Terminal Ferrite BeadPLUG, Connector 6P PIN, Connector 2PMain Panel VibratorPanel Power Power SW 928-916-11

MDS-PC2 specifications

The Sony MDS-PC2 is a compact yet powerful digital MiniDisc recorder that was designed to bring studio-quality recording capabilities to the consumer level. Launched in the late 1990s, this device was particularly notable for its versatility and advanced audio technologies, making it a favorite among audiophiles and home studio enthusiasts alike.

One of the standout features of the MDS-PC2 is its ability to record and playback audio with exceptional clarity. It utilizes the MiniDisc format, which employs a magneto-optical technology that allows for higher-quality recordings compared to traditional cassette formats. The MDS-PC2 supports various audio bit rates, including standard Stereo at 292 kbps and long play modes, which double the recording time at the cost of some audio fidelity. This flexibility allows users to tailor their recording settings to their specific needs.

The MDS-PC2 features an intuitive interface, including an easy-to-read LCD display that shows vital information about the track, such as its name, length, and remaining recording time. The device is equipped with multiple input options, including optical and analog connections, facilitating seamless integration into any audio setup. The built-in digital signal processor (DSP) enhances the recording quality by minimizing background noise and distortion, providing a clean and crisp listening experience.

Another notable characteristic is the MDS-PC2's editing capabilities. Users can easily create custom playlists, erase tracks, and rearrange audio sequences with a few simple commands. The unit also supports fade-in and fade-out functionalities, allowing for smooth transitions between tracks. The flexibility in editing makes it a potent tool for podcasters, musicians, and anyone looking to produce high-quality audio content.

Portability is another key aspect of the Sony MDS-PC2. Its lightweight design and durable build make it easy to transport, catering to users who are frequently on the move. Battery operation options provide additional convenience for those who wish to use the recorder away from a power source.

In summary, the Sony MDS-PC2 combines innovative technology with user-friendly features, making it an excellent choice for anyone seeking an efficient and high-quality MiniDisc recorder. Its capability to produce superior audio recordings, coupled with its adaptability and portability, has solidified its place as an essential tool for audio recording and playback in various settings.
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