Sony HCD-PX333 Precautions for Checking Laser Diode Emission, Precautions for Adjustments

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HCD-PX333

2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION

To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.

3. PRECAUTIONS FOR USE OF OPTICAL PICK- UP (KMS-262A/262E)

As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.

pick-up

flexible board

 

laser tap

Optical pick-up flexible board

•Oscilloscope (Measure after performing CAL of prove.)

•Digital voltmeter

•Thermometer

•Jig for checking BD (MD) board waveform (Part No. : J-2501-196-A)

5.When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope.

(VC and ground will become short-circuited.)

6.Using the above jig enables the waveform to be checked without the need to solder.

(Refer to Servicing Notes on page 9.)

7.As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.

*1 Laser power meter

When performing laser power checks and adjustment (electrical adjustment), use of the new MD laser power meter 8010S (Part No. J-2501-145-A) instead of the conventional laser power meter is convenient.

It sharply reduces the time and trouble to set the laser power meter sensor onto the objective lens of optical pick-up.

4. PRECAUTIONS FOR ADJUSTMENTS

1.When replacing the following parts, perform the adjustments and checks with in the order shown in the following table.

2.Set the MD test mode when performing adjustments. After completing the adjustments, exit the MD test mode. Perform the adjustments and checks in “Group Service” of the MD test mode.

3.Perform the adjustments to be needed in the order shown.

4.Use the following tools and measuring devices.

•Extension jig (27 core) (Part No. : J-2501-100-A)

CN102 on the BD (MD) board to CN1003 on the MD DIGITAL board

Extension jig (17 core) (Part No. : J-2501-198-A)

CN103 on the BD (MD) board to CN1004 on the MD DIGITAL board

•Check Disc (TDYS-1) (Part No. : 4-963-646-01)

•Test Disk (MDW-74/GA-1) (Part No. : 4-229-747-01)

•Laser power meter LPM-8001 (Part No. : J-2501-046-A) or

MD Laser power meter 8010S (Part No. : J-2501-145-A)*1

 

 

 

 

Parts to be replaced

 

 

 

Adjustment

Optical

IC101

IC102

IC151

IC190

IC195

D101

 

Pick-up

 

 

 

 

 

 

 

7. Initial setting of adjustment value

 

 

 

 

 

 

 

8.Recording of Iop information

9.Temperature compensation offset adjustment

10.Laser power adjustment

11.Iop NV Save

12.Traverse adjustment

13.Focus bias adjustment

16.Auto gain adjustment 6-4. AUTO CHECK

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Contents MDM-7X2A SpecificationsMD Section HCD-PX333 SELF-DIAGNOSIS FunctionHCD-PX333 Items of Error History Mode Items and ContentsError Code Details of Error Table of Error CodesCD Section Model Identification Table of ContentsElectrical Adjustments DiagramsFor MD Cleaning Objective Lens of Optical PICK-UPHCD-PX333 Section Servicing Notes For CDService Position IOP JIG for Checking BD MD Board WaveformRecord Procedure When Memory NG is DisplayedChecks Prior to Parts Replacement and Adjustments in MD Criteria for Determination Measure if unsatisfactorySpecified Value Bit Binary Retry Cause Display Mode in MDDecimal Bit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary CD aging mode sequence CD Aging ModeCD-TEXT Test Disc Checking MethodRestrictions in CD-TEXT Display CD-TEXT Test Disc Recorded Contents and Display Section General HCD-PX333 Parts IdentificationRemote Control This set can be disassembled in the order shown below HCD-PX333 Section DisassemblyFront Panel Section CaseREC BOARD, VOL Board Jack BOARD, BL BOARD, Panel BOARD, LCDBack PANEL, SP BOARD, Tuner TRANSFORMER, Power and DC FANAMP Board Main BOARD, Power BoardOver Write Head HR901, BD MD Board MD Mechanism Deck MDM-7X2ALoading Motor Assy M103 Holder AssyOptical PICK-UP KMS-262 Sled Motor Assy M102CD Mechanism Deck CDM55A-21BD53 Spindle Motor Assy M101Holder BU Assy MD Digital BoardTray CDM, Loading Board Base Unit BU-21BD53, Holder 55-BU21CAM CDM55 HCD-PX333 Section Test Mode Basic Operations of the Test Mode MD Seciton Precautions for USE of Test ModeSetting the Test Mode Releasing the Test ModeCheck Selecting the Test ModeOUT Operating the Continuous Playback ModeFunctions of Other Buttons MIDMeanings of Other Displays Test Mode DisplaysInformation Automatic SELF-DIAGNOSIS FunctionHCD-PX333 Section Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement YES Adjustment flowLaser power meter Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-262A/262E Precautions for AdjustmentsChecks Prior to Repairs Using the Continuously Recorded DiscTemperature Compensation Offset Check Laser Power CheckAuto Check Other ChecksTraverse Check Self-Recording/playback Check Play Check MO Error Rate CheckCD Error Rate Check Focus Bias CheckRecording and Displaying the IOP Information Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Laser Power AdjustmentIop NV Save Traverse AdjustmentFocus Bias Adjustment EnterYES R MO Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level AdjustmentAdjustment and checking Loacation Curve Check RF Level CheckBalance Check BD CD Board Conductor Side Memo HCD-PX333 Section Diagrams Block DiagramsMD Servo Section Optical A/D Converter SectionFAN Main SectionST/CD+10V DISPLAY, Power Supply SectionAUS Circuit Boards LocationSide B Schematic Diagram BD CD Board Printed Wiring Board BD MD Board LocationSemiconductor 5959 IC B/D Printed Wiring Board MD Digital Section Schematic Diagram MD Digital /3 See page 79 for IC Block Diagrams See page 79 for IC Block Diagrams Semiconductor Location IC B/D HCD-PX333 Printed Wiring Board SP Board Printed Wiring Board AMP BoardSchematic Diagram AMP Board Schematic Diagram SP Board IC602 Printed Wiring Board PanelSchematic Diagram Panel See page 55 for Circuit Boards Location 7474 Schematic Diagram Power Board I2SLRCKOUT WaveformsBD CD Board BD MD Board MD Digital Board Main BoardIC101 CXA2523AR BD MD Board IC Block DiagramsIC141 BH6519FS-E2 BD MD Board IC1005 uDA1360TS MD Digital Board IC931 M62016L Main Board IC PIN Function Description BD MD Board IC151 CXD2662R Asyo XcasXWE MvciSfdr FrdrFS4 SrdrDarst ResetLVL1 LVL0VCC1 XeltWR-PWR I2CCLKVSS4 VCC3VSS3 VCC4CLK Reset XT1Drvdat DrvclkCLP POS IN-SWLOD POS LOD NEGMain Board IC501 ∝PDSS3033AYGF-M18-3BA System Controller KBD CHK MD/CD PowerGC Power TR RelaySelf Write PC PowerSircs RDS CLKREC Board Section Exploded Views58 A-4476-550-A Panel BOARD, Complete LCD601 1-804-371-11 Indicator TUBE, Liquid CrystalChassis 162 153 156 161 163 152 151163 154303 311 305 313314 310 309 319 308360 356 359 359357 355 354 352 365 370 353 366353 369522 501 517 514 518 516 502 519 520 515 521 CD Mechanism Deck Section CDM55A-21BD53510 505 508 511 504 506 512 513HCD-PX333 Section AMP Electrical Parts List Diode F1J6TP HCD-PX333 BD MDTANTAL. Chip Elect ChipJack Jack HCD-PX333 Loading Main HCD-PX333 Main AEP,UK MY,SP,HK,AUSCONNECTOR, FFC 31P HCD-PX333 Main MD DigitalMD Digital BOARD, Complete Capacitor MD Digital Panel HCD-PX333 Panel Power HCD-PX333 Power REC HCD-PX333 VOL 111 HCD-PX333 Revision History
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