Sony HCD-C5 Using the Continuously Recorded Disc, Checks Prior to Repairs, Laser Power Check

Page 37

5. USING THE CONTINUOUSLY RECORDED DISC

*This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc.

1.Insert a disc (blank disc) commercially available.

2.Press the .“R” or >“R” button and display “CREC 1MODE” (C35).

3.Press the ENTER/YES “R” button again to display “CREC 1 MID”.

Display “CREC 1(0300)” and start to recording.

4.Complete recording within 5 minutes.

5.Press the MENU/NO “R” button and stop recording .

6.Press the MD Z button and remove the disc.

The above has been how to create a continuous recorded data for the focus bias adjustment and error rate check.

Note: Be careful not to apply vibration during continuous recording.

6. CHECKS PRIOR TO REPAIRS

These checks are performed before replacing parts according to “approximate specifications” to determine the faulty locations. For details, refer to “Checks Prior to Parts Replacement and Adjustments in MD” (see page 30).

6-1. Temperature Compensation Offset Check

When performing adjustments, set the internal temperature and room temperature to 22 to 28ºC.

Procedure:

1.Press the . “R” or > “R” button to display “TEMP CHECK” (C12).

2.Press the ENTER/YES “R” button.

3.“T=@@(##) [OK]” should be displayed. If “T=@@ (##) [NG]” is displayed, it means that the results are bad.

(@@ indicates the current value set, and ## indicates the value written in the non-volatile memory.)

6-2. Laser Power Check

Before starting adjustment;

The laser power adjustment value changes depending upon the types of the optical pick-up (KMS-260B or KMS-260E).

Check the type of the optical pick-up before starting adjustment. (See the illustrations “The method of identifying the optical pick- up” on page 41)

Before checking, check the Iop value of the optical pick-up. (Refer to 8. Recording and Displaying the Iop Information (see page 40))

Connection:

laser

power meter

Optical pick-up objective lens

digital voltmeter

BD (MD) board

 

 

 

 

 

 

 

 

 

 

CN105 pin 1 (I+3V)

 

 

 

 

 

 

 

 

+

 

 

 

 

CN105 pin 2 (IOP)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HCD-C5

Procedure:

1.Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the m“R” button or M “R” button to move the optical pick-up.)

Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (IOP).

2.Then, press the . “R” or > “R” button and display “LDPWR CHECK” (C13).

3. Press the ENTER/YES “R” button once and display “LD 0.9mW$

”. Check that the reading of the laser power meter becomes specified value.

SPECIFIED VALUE

KMS-260B

0.85 to 0.91 mW

KMS-260E

0.90 to 0.96 mW

 

4.Press the ENTER/YES “R” button once more and display “ LD 7.0mW$ ”. Check that the reading the laser power meter and digital volt meter satisfy the specified value.

Specified Value:

Laser power meter reading :

KMS-260B 7.0 to 0.2 mW

KMS-260E 7.25 to 0.25 mW

Digital voltmeter reading : Optical pick-up displayed value ± 10%

(Optical pick-up label)

 

 

 

 

 

For details of the method for

 

KMS260B

 

 

20101

 

checking this value, refer to

 

 

“8. Recording and Displaying

 

H0576

 

 

 

the Iop Information”

 

 

 

 

 

 

 

 

 

 

lOP = 57.6 mA in this case

lOP (mA) = Digital voltmeter reading (mV)/1 ()

5.Press the MENU/NO “R” button and display “LDPWR CHECK” (C13) and stop the laser emission.

(The MENU/NO “R” button is effective at all times to stop the laser emission.)

Note: After step 4, each time the ENTER/YES “R” button is pressed, the display will be switched to “LD 0.7W$ ”and “LD 6.2mW$

“LD WP $ ”. Nothing needs to be performed here.

Checking Location: BD (MD) board (see page 44)

6-3. Iop Compare

The current Iop value at laser power 7.0 mW output and reference Iop value (set at shipment) written in the nonvolatile memory are compared, and the rate of increase/decrease will be displayed in percentage.

Note: Perform this function with the optical pick-up set at room tempera- ture.

Procedure:

1.Press the .“R” or >“R” button to display “Iop Compare” (C27).

2.Press the ENTER/YES “R” button and start measurements.

3.When measurements complete, the display changes to “± xx% yy”.

xx is the percentage of increase/decrease, and OK or NG is displayed at yy to indicate whether the percentage of increase/ decrease is within the allowable range.

4.Press the MENU/NO “R” button to end.

37

Image 37
Contents TT Base Assy SpecificationsOPTIMA-720L1E MDM-7B4MSELF-DIAGNOSIS Function HCD-C5Electrical Adjustments Table of ContentsDiagrams Exploded Views Electrical Parts ListHCD-C5 Section Servicing Note Flexible Circuit Board RepairingService Position of the MD Mechanism Deck Service Position of the CD Mechanism DeckIOP JIG for Checking BD MD Board WaveformParts Identification Section GeneralParts Identification Remote controlSET Bottom PLATE, Case HCD-C5 Section DisassemblyPanel Board Bottom PLATE, CaseCN1 CD Mechanism Deck TN-CCD1001Z, BD CD BoardConnector Board Front Bracket SECTION, Loading Motor Assy M902 SW Board Rear Damper Bracket Feed Motor Assy M903Optical PICK-UP OPTIMA-720L1E Base Section Jack BOARD, HP BOARD, Rear Cover Spindle Motor Assy M904Tuner PACK, D. C. FAN M901 Ucom BOARD, AMP Power BoardConnector CN105 Audio BOARD, Power BOARD, Power Transformer T900Holder Assy MD Mechanism Deck MDM-7B4M, MD Digital BoardLoading Motor M703, Spindle Motor M701, Sled Motor M702 BD MD BoardOP-SUB Section Over Write HeadHCD-C5 Section Test Mode Setting the Test Mode Precautions for USE of Test ModeReleasing the Test Mode MD SecitonSelecting the Test Mode Basic Operations of the Test ModeENTER/YES R Operating the Continuous Playback Mode Automatic SELF-DIAGNOSIS Function Functions of Other ButtonsInformation Record Procedure When Memory NG is DisplayedDisplay Precedure Retry Cause Display Mode in MD Checks Prior to Parts Replacement and Adjustments in MDCriteria for Determination Measure if unsatisfactory PrecedureReading the Display Reading the Retry Cause DisplayExample Details Bit When BinaryCD Section Section Electrical Adjustments HCD-C5RF Level Check Check before replacement Parts Replacement and AdjustmentMD Section YES Adjustment flowPrecautions for USE of Optical PICK-UP KMS-260B/260E Precautions for Checking Laser Diode EmissionPrecautions for Adjustments Laser power meterTemperature Compensation Offset Check Using the Continuously Recorded DiscLaser Power Check Checks Prior to RepairsOther Checks Auto CheckTraverse Check Play Check Focus Bias CheckSelf-Recording/playback Check Temperature Compensation Offset Adjustment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IOP InformationMethod of identifying the optical pick-up KMS-260B/260E Traverse AdjustmentIop NV Save Read power traverse adjustment Error Rate Check Focus Bias AdjustmentCD Error Rate Check MO Error Rate CheckCD Auto Gain Control Output Level Adjustment Auto Gain Control Output Level AdjustmentMO Auto Gain Control Output Level Adjustment Adjustment and checking LoacationCircuit Boards Location Section Diagrams HCD-C5Waveforms AUSOPTIMA-720L1E Block Diagram CD Servo SectionAPC Block Diagram MD Servo SectionTape MD-L Block Diagram Main SectionSemiconductor LocationIC B/D Location Side B Location Side aIC B/D 153 IC201 10K 1/16W Semiconductor Location Printed Wiring Board Ucom BoardDigital Optical Input Speaker IC302 D301 1SS355TE IC602 HCD-C5 IC901 Schematic Diagram Power Section IC101 CXD3068Q BD CD Board IC103 CXA2581N-T4 BD CD Board IC Block DiagramsIC102 BA5982FP-E2 BD CD Board IC141 BH6519FS-E2 BD MD Board IC201 ∝ DA1360TS MD Digital BoardRtcb Vddd PREEM0 NC NC TEST2 Selstatic TEST1 Reset Bcko Vddd CVssd Vssd C L3DATAIC601 M66004M8FP-200D Panel Board IC101 IC PIN Function DescriptionSens SrdtXrst SqsyAsyi AsyoAvdd BiasTEST1 SpfdTEST2 TEST3 Dvss IC701 DA-RESET ResetPLAY-SW REC-SWIC501 Help SPK-RELAYBvdd BvssOverall Section Section Exploded ViewsFront Panel Section 102 104 111 103 112 114 105 101 106 107 108 Chassis110 113156 157 151 158 155 154152 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 760 762 763 764 759 761758 761 757 756 751 753754 755 752AMP Audio Section Electrical Parts List BD CD Audio HCD-C5HCD-C5 BD CD CONNECTOR, FFC 29PDiode UDZ-TE-17-3.9B Ferrite Bead FerriteBD CD HCD-C5 BD MD HCD-C5 BD MD MD Digital BD MD Connector Jack HCD-C5Ferrite Bead / Conductor HCD-C5 MD Digital PanelFerrite 0UH InductorPanel Power Power Ucom CONNECTOR, Round Type 6P CONNECTOR, FFC 16PConnector DIN 8P PIN, Connector 4P DiodeR225 216-841-11 Switch Detection Limit Wire Flat Type 19 CoreTRANSFORMER, Power AEP,UK,AUS Hardware ListHCD-C5 Revision History