Sony HCD-C5 service manual Focus Bias Check, Play Check, Self-Recording/playback Check

Page 39

HCD-C5

9.Press the ENTER/YES “R” button to display “EFB = MO- P”.

Then, the optical pick-up moves to the pit area automatically and servo is imposed.

10.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the . “R” or

>“R” button.

Traverse Waveform

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

11.Press the ENTER/YES “R” button to display “EF MO CHECK” (C14).

The disc stops rotating automatically.

12.Press the MD Z button and take out the disc.

13.Load the check disc (TDYS-1).

14.Press the . “R” or > “R” button and display “EF CD CHECK” (C15).

15.Press the ENTER/YES “R” button to display “EFB = CD”. Servo is imposed automatically.

16.Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not press the . “R” or

>“R” button.

Traverse Waveform

A

VC

B

Specified value : Below 10% offset value

Offset value (%) = IA – BI X 100 2 (A + B)

17.Press the ENTER/YES “R” button to display “EF CD CHECK” (C15).

18.Press the MD Z button and take out the check disc (TDYS-1).

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

6-7. Focus Bias Check

Change the focus bias and check the focus tolerance amount.

Procedure:

1.Load the test disc (MDW-74/GA-1).

2.Press the . “R” or > “R” button to display “CPLAY 1MODE” (C34).

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

4. Press the

MENU/NO “R”

button when “C =

AD =

” is displayed.

 

5.Press the . “R” or > “R” button to display “FBIAS CHECK” (C16).

6.Press the ENTER/YES “R” button to display “ / c =

”.

The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value.

Check that the C1 error is below 20 and ADER is below 2.

7.Press the ENTER/YES “R” button to display “ / b =

”.

Check that the C1 error is about 100 and ADER is below 2.

8.Press the ENTER/YES “R” button to display “ / a =

”.

Check that the C1 error is about 100 and ADER is below 2.

9.Press the MENU/NO “R” button, then press the MD Z button and take out the test disc.

6-8. C PLAY Check

MO Error Rate Check

Procedure:

1.Load the test disc (MDW-74/GA-1).

2.Press the . “R” or > “R” button to display “CPLAY 1MODE” (C34).

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

4.The display changes to “C = AD = ”.

5.If the C1 error rate is below 20, check that ADER is 00.

6.Press the MENU/NO “R” button to stop playback, then press the MD Z button and take out the test disc.

CD Error Rate Check

Procedure:

1.Load the check disc (TDYS-1).

2.Press the . “R” or > “R” button to display “CPLAY 1MODE” (C34).

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

4.The display changes to “C = AD = )”.

5.Check that the C1 error rate is below 20.

6.Press the MENU/NO “R” button to stop playback, then press the MD Z button and take out the check disc.

6-9. Self-Recording/playback Check

Prepare a continuous recording disc using the unit to be repaired and check the error rate.

Procedure:

1.Load a recordable disc (blank disc).

2.Press the . “R” or > “R” button to display “CREC 1MODE” (C34).

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

4.When recording starts, “ REC ” and display “CREC 1 @@@@”

(@@@@ is the address).

5.About 1 minute later, press the MENU/NO “R” button to stop continuous recording.

6.Press the . “R” or >“R” button to display “CPLAY 1 MODE” (C34).

7.Press the ENTER/YES “R” button to display “CPLAY 1 MID”.

8.“C = AD = )” will be displayed.

9.Check that the C1 error becomes below 20 and the AD error below 2.

10.Press the MENU/NO “R” button to stop playback, then press the MD Z button and take out the disc.

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Contents MDM-7B4M SpecificationsTT Base Assy OPTIMA-720L1ESELF-DIAGNOSIS Function HCD-C5Exploded Views Electrical Parts List Table of ContentsElectrical Adjustments DiagramsHCD-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 MD Seciton Precautions for USE of Test ModeSetting the Test Mode Releasing the Test ModeBasic 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 Precedure Checks Prior to Parts Replacement and Adjustments in MDRetry Cause Display Mode in MD Criteria for Determination Measure if unsatisfactoryReading the Retry Cause Display Reading the DisplayExample Details Bit When BinarySection Electrical Adjustments HCD-C5 CD SectionRF Level Check Parts Replacement and Adjustment Check before replacementMD Section YES Adjustment flowLaser power meter Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK-UP KMS-260B/260E Precautions for AdjustmentsChecks Prior to Repairs Using the Continuously Recorded DiscTemperature Compensation Offset Check Laser Power CheckAuto Check Other ChecksTraverse Check Focus Bias Check Play CheckSelf-Recording/playback Check Recording and Displaying the IOP Information Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Laser Power AdjustmentTraverse Adjustment Method of identifying the optical pick-up KMS-260B/260EIop NV Save Read power traverse adjustment MO Error Rate Check Focus Bias AdjustmentError Rate Check CD Error Rate CheckAdjustment and checking Loacation Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAUS Section Diagrams HCD-C5Circuit Boards Location WaveformsOPTIMA-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 IC Block Diagrams IC101 CXD3068Q BD CD Board IC103 CXA2581N-T4 BD CD BoardIC102 BA5982FP-E2 BD CD Board IC141 BH6519FS-E2 BD MD Board IC201 ∝ DA1360TS MD Digital BoardVssd C L3DATA Selstatic TEST1 Reset Bcko Vddd CRtcb Vddd PREEM0 NC NC TEST2 VssdIC601 M66004M8FP-200D Panel Board IC101 IC PIN Function DescriptionSqsy SrdtSens XrstBias AsyoAsyi AvddSpfd TEST1TEST2 TEST3 Dvss IC701 REC-SW ResetDA-RESET PLAY-SWIC501 Bvss SPK-RELAYHelp BvddOverall Section Section Exploded ViewsFront Panel Section 113 Chassis102 104 111 103 112 114 105 101 106 107 108 110155 A-4725-732-A MD Digital BOARD, Complete 155 154156 157 151 158 152CD 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 753754 755 752 761760 762 763 764 759 758 761 757 756 751AMP Audio Section Electrical Parts List BD CD Audio HCD-C5Ferrite CONNECTOR, FFC 29PHCD-C5 BD CD Diode UDZ-TE-17-3.9B Ferrite BeadBD CD HCD-C5 BD MD HCD-C5 BD MD MD Digital BD MD Connector Jack HCD-C5Inductor HCD-C5 MD Digital PanelFerrite Bead / Conductor Ferrite 0UHPanel Power Power Ucom PIN, Connector 4P Diode CONNECTOR, FFC 16PCONNECTOR, Round Type 6P Connector DIN 8PR225 216-841-11 Hardware List Wire Flat Type 19 CoreSwitch Detection Limit TRANSFORMER, Power AEP,UK,AUSHCD-C5 Revision History
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