Sony service manual Section Electrical Adjustments HCD-C5, CD Section, RF Level Check

Page 33

SECTION 5

ELECTRICAL ADJUSTMENTS

HCD-C5

CD SECTION

Note 1:

1.CD Block is basically designed to operate without adjustment. There- fore, check each item in order given.

2.Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4.Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

Note 2:

Checking Location:

– BD (CD) BOARD –

IC103

As the laser diode in the optical pick-up (OPTIMA-720L1E) 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.

TP (RFAC)

pick-up

IC101TP (DVC 1.65V)

laser tap

frexible board

RF Level Check

Connection:

oscilloscope

(AC range)

BD (CD) board
TP (RFAC)	+
TP (DVC 1.65V)	–
	–

Procedure:

1.Connect an oscilloscope to test point TP (RFAC) and TP (DVC 1.65V) on the BD (CD) board.

2.Turn the power on.

3.Put the disc (YEDS-18) in to playback the number five track.

4.Confirm that oscilloscope waveform is clear and check RF sig- nal level is correct or not.

Note: A clear RF signal waveform means that the shape “◊ ” can be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV: 200 mV

TIME/DIV: 500 ns

level: 1.1 ± 0.3 Vp-p

Checking Location: BD (CD) board

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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 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 Retry Cause Display Mode in MD Checks Prior to Parts Replacement and Adjustments in MDCriteria for Determination Measure if unsatisfactory PrecedureReading 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 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 RepairsAuto Check Other ChecksTraverse Check Focus Bias Check Play CheckSelf-Recording/playback Check Temperature Compensation Offset Adjustment Initial Setting of Adjustment ValueLaser 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 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 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 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 BiasSpfd TEST1TEST2 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