Sony MDS-SD1 service manual Checks Prior to Parts Replacement and Adjustments

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CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

	Criteria for Determination	Measure if unsatisfactory:
	(Unsatisfactory if specified value is not satisfied)	Measure if unsatisfactory:
	(Unsatisfactory if specified value is not satisfied)

Laser power check	• 0.9 mW power	• Clean the optical pick-up
(5-6-2 : See page 25)	Specified value : 0.84 to 0.92 mW	• Adjust again
	• 7.0 mW power	• Replace the optical pick-up
	Specified value : 6.8 to 7.2 mW

	lop (at 7mW)	• Replace the optical pick-up
	• Labeled on the optical pickup
	Iop value ± 10mA

Traverse check	• Traverse waveform	• Replace the optical pick-up
(5-6-3 : See page 25)	Specified value : Below 10% offset
Focus bias check	• Error rate check	• Replace the optical pick-up
(5-6-4 : See page 26)	Specified value : For points a, b, and c
	C1 error : Below 220
	AD error : Below 2
C PLAY check	• Error rate check	• Replace the optical pick-up
(5-6-5 : See page 26)	Specified value:
	a. When using test disc (MDW-74/AU-1)
	C1 error : Below 80
	AD error : Below 2
	b.When using check disc (TDYS-1)
	C1 error : Below 50
Self-recording/playback	• CPLAY error rate check	If always unsatisfactory:
check	Specified value:	• Replace the overwrite head
(REC/PLAY)	C1 error : Below 80	• Check for disconnection of the circuits around the
(5-6-6 : See page 26)	AD error : Below 2	overwrite head
		If occasionally unsatisfactory:
		• Check if the overwrite head is distorted
		• Check the mechanism around the sled
TEMP check	• Unsatisfactory if displayed as T=@@ (##) [NG]”	• Check for disconnection of the circuits around D101
(Temperature	NG	(BD board)
compensation	(@@, ## are both arbitrary numbers)	• Check the signals around IC101, IC121, CN102,
offset check)		CN103 (BD board)
(5-6-1 : See page 25)

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.

When performing adjustments, use the specified values for adjustments.

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Contents Specifications MDS-JE520MDM-5A MBU-5ASELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Parts No Flexible Circuit Board RepairingSpecification Label Table of Contents DisassemblyDiagrams Exploded ViewsSection Servicing Note JIG for Checking BD Board WaveformRecord Precedure Checks Prior to Parts Replacement and Adjustments Criteria for Determination Measure if unsatisfactoryForced Reset Main Board Component SideCleaning of Objective Lens of Optical Pickup Fluorescent Indicator Tube and Mechanism DeckAttaching the Glass Assembly Fluorescent Indicator TUBE, LED Complete Lighting CheckServicing Position Retry Cause Display Mode Higher Bits Lower Bits HexaCause of Retry Occurring conditions BinaryHexadecimal Binary Bit When BinaryHigher Bits Lower Bits Hexa Details Section General Front Panel Location of Parts and ControlsFront Panel Section DisassemblyGlass Assy Slider CAM Base Unit and BD BoardSW Board and Loading Motor M103 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode GroupFunctions of Other Buttons Operating the Continuous Playback ModeNon-Volatile Memory Mode EEP Mode Test Mode Displays Section Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Checking Laser Diode Emissinon Precautions for USE of Optical PICK- UP KMS-260APrecautions for Adjustments Creating Continuously Recorded DiscTemperature Compensation Offset Check Laser Power CheckChecks Prior to Repairs Specified ValuePlay Checking MO Error Rate Check CD Error Rate CheckFocus Bias Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment Error Rate Check Auto Gain Control Output Level AdjustmentCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Section Diagrams Circuit Boards LocationBlock Diagrams BD Section MDS-SD1PB Digital out REC DigitalRECDigital Main SectionPBDigital out For schematic diagrams For printed wiring boardsWaveforms Display SectionPrinted Wiring Board BD Section Semiconductor LocationSchematic Diagram BD 1/2 Section Schematic Diagram BD 2/2 Section Schematic Diagram Main 1/2 Section Schematic Diagram Main 2/2 Section Printed Wiring Board Main Section Schematic Diagram Panel Section Printed Wiring Board Panel Section Schematic Diagram Connector Section Printed Wiring Board Connector Section System Control To HCD-SD1MDS-SD1 IC Block Diagrams BD Section IC101IC301 LB1641 IC152 BH6511FS-E2Main Section IC201 UDA1341TS/N2 IC851 M5293L Connector Section IC774 P82B715TD.118IC822 M62016FP-E1 Pin No Pin Name Function IC PIN FunctionsIC101 CXA2523AR RF Amplifier BD Board IC701 M30610MC-A01FP System Control ∝CON Main Board CHAK-IN Section Exploded Views Case and Back Panel SectionFL901 1-517-804-11 Indicator TUBE, Fluorescent Front Panel SectionPanel SW Board 67 A-4724-619-A Panel BOARD, Complete209 4-988-466-21 Spring ELECTROSTATIC, Leaf Mechanism Deck Section MDM-5AInsulator F Motor ASSY, Sled Base Unit Section MBU-5AHEAD, Over Light Section Electrical Parts List Connector Connector Encoder Main Main Inductor Line FilterFILTER, Line FeritePanel Panel SW Accessories & Packing Materials FILTER, Clamp Ferrite Core MANUAL, Instruction EnglishMANUAL, Instruction CHINESESP,HK Hardware List Screw +BSony Corporation