Sony HCD-C5 Precautions for Checking Laser Diode Emission, Precautions for Adjustments

Page 36

HCD-C5

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-260B/260E)

As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when handling it.

Before disconnecting the connector, solder 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

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.

•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

•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 6.)

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.

 

 

 

 

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 control output level adjustment

6-4. AUTO CHECK

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Contents Specifications TT Base AssyOPTIMA-720L1E MDM-7B4MHCD-C5 SELF-DIAGNOSIS FunctionTable of Contents Electrical AdjustmentsDiagrams Exploded Views Electrical Parts ListFlexible Circuit Board Repairing HCD-C5 Section Servicing NoteService Position of the CD Mechanism Deck Service Position of the MD Mechanism DeckJIG for Checking BD MD Board Waveform IOPSection General Parts IdentificationRemote control Parts IdentificationHCD-C5 Section Disassembly SET Bottom PLATE, CaseBottom PLATE, Case Panel BoardCD Mechanism Deck TN-CCD1001Z, BD CD Board CN1Connector Board Front Bracket SECTION, Loading Motor Assy M902 SW Board Feed Motor Assy M903 Rear Damper BracketOptical PICK-UP OPTIMA-720L1E Base Section Spindle Motor Assy M904 Jack BOARD, HP BOARD, Rear CoverUcom BOARD, AMP Power Board Tuner PACK, D. C. FAN M901Audio BOARD, Power BOARD, Power Transformer T900 Connector CN105MD Mechanism Deck MDM-7B4M, MD Digital Board Holder AssyBD MD Board Loading Motor M703, Spindle Motor M701, Sled Motor M702Over Write Head OP-SUB SectionHCD-C5 Section Test Mode Precautions for USE of Test Mode Setting the Test ModeReleasing the Test Mode MD SecitonBasic Operations of the Test Mode Selecting the Test ModeENTER/YES R Operating the Continuous Playback Mode Functions of Other Buttons Automatic SELF-DIAGNOSIS FunctionInformation When Memory NG is Displayed Record ProcedureDisplay Precedure Checks Prior to Parts Replacement and Adjustments in MD Retry Cause Display Mode in MDCriteria for Determination Measure if unsatisfactory PrecedureReading the Retry Cause Display Reading the DisplayExample Bit When Binary DetailsSection Electrical Adjustments HCD-C5 CD SectionRF Level Check Parts Replacement and Adjustment Check before replacementMD Section Adjustment flow YESPrecautions for Checking Laser Diode Emission Precautions for USE of Optical PICK-UP KMS-260B/260EPrecautions for Adjustments Laser power meterUsing the Continuously Recorded Disc Temperature Compensation Offset CheckLaser Power Check Checks Prior to RepairsAuto Check Other ChecksTraverse Check Focus Bias Check Play CheckSelf-Recording/playback Check Initial Setting of Adjustment Value Temperature Compensation Offset AdjustmentLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Method of identifying the optical pick-up KMS-260B/260EIop NV Save Read power traverse adjustment Focus Bias Adjustment Error Rate CheckCD Error Rate Check MO Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level AdjustmentMO Auto Gain Control Output Level Adjustment Adjustment and checking LoacationSection Diagrams HCD-C5 Circuit Boards LocationWaveforms AUSBlock Diagram CD Servo Section OPTIMA-720L1EBlock Diagram MD Servo Section APCBlock Diagram Main Section Tape MD-LLocation SemiconductorIC B/D Location Side a Location Side BIC B/D 153 IC201 10K 1/16W Printed Wiring Board Ucom Board Semiconductor LocationDigital Optical Input Speaker IC302 D301 1SS355TE IC602 HCD-C5 IC901 Schematic Diagram Power Section IC Block Diagrams IC101 CXD3068Q BD CD Board IC103 CXA2581N-T4 BD CD BoardIC102 BA5982FP-E2 BD CD Board IC201 ∝ DA1360TS MD Digital Board IC141 BH6519FS-E2 BD MD BoardSelstatic TEST1 Reset Bcko Vddd C Rtcb Vddd PREEM0 NC NC TEST2Vssd Vssd C L3DATAIC601 M66004M8FP-200D Panel Board IC PIN Function Description IC101Srdt SensXrst SqsyAsyo AsyiAvdd BiasSpfd TEST1TEST2 TEST3 Dvss IC701 Reset DA-RESETPLAY-SW REC-SWIC501 SPK-RELAY HelpBvdd BvssSection Exploded Views Overall SectionFront Panel Section Chassis 102 104 111 103 112 114 105 101 106 107 108110 113155 154 156 157 151 158152 155 A-4725-732-A MD Digital BOARD, CompleteCD Mechanism Deck Section TN-CCD1001Z CD Mechanism Deck Secti Front Bracket Section TN-CCD1001Z CD Mechanism Deck Section Base Section TN-CCD1001Z CD Mechanism Deck Section Chassis Section TN-CCD1001Z MD Mechanism Deck MDM-7B4M 761 760 762 763 764 759758 761 757 756 751 753754 755 752AMP Audio Section Electrical Parts List Audio HCD-C5 BD CDCONNECTOR, FFC 29P HCD-C5 BD CDDiode UDZ-TE-17-3.9B Ferrite Bead FerriteBD CD HCD-C5 BD MD HCD-C5 BD MD BD MD Connector Jack HCD-C5 MD DigitalHCD-C5 MD Digital Panel Ferrite Bead / ConductorFerrite 0UH InductorPanel Power Power Ucom CONNECTOR, FFC 16P CONNECTOR, Round Type 6PConnector DIN 8P PIN, Connector 4P DiodeR225 216-841-11 Wire Flat Type 19 Core Switch Detection LimitTRANSFORMER, Power AEP,UK,AUS Hardware ListHCD-C5 Revision History
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