Sony MDS-SD1 service manual Section Servicing Note, JIG for Checking BD Board Waveform

Page 6

SECTION 1

SERVICING NOTE

JIG FOR CHECKING BD BOARD WAVEFORM

The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows.

GND : Ground

I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser)

IOP	: For measuring IOP (Check the deterioration of the optical pick-up laser)
TEO	: TRK error signal (Traverse adjustment)
RF	: RF signal (Check jitter)
VC	: Reference level for checking the signal

Mechanism deck

CN110

6P connector

5P Connector

VC

RF

TEO

IOP

I+3V

GND

	1	RF
RF		VC
		TEO MDM-3
VC		IOP
TEO	5	I+3V
TEO
IOP	1	VC
I+3V		RF
I+3V		TEO	MDM-5
		IOP	MDM-5
		IOP
GND	6	I+3V
	6	GND

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Image 6

Contents MDM-5A SpecificationsMDS-JE520 MBU-5ASELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Flexible Circuit Board Repairing Specification LabelParts No Diagrams Table of ContentsDisassembly 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 Cause of Retry Occurring conditions Retry Cause Display ModeHigher Bits Lower Bits Hexa BinaryBit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary Section General Front Panel Location of Parts and ControlsSection Disassembly Glass AssyFront Panel Slider CAM Base Unit and BD BoardSW Board and Loading Motor M103 Setting the Test Mode Section Test ModePrecautions for USE of Test Mode Exiting the Test ModeSelecting the Test Mode GroupOperating the Continuous Playback Mode Non-Volatile Memory Mode EEP ModeFunctions of Other Buttons Test Mode Displays Section Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Adjustments Precautions for Checking Laser Diode EmissinonPrecautions for USE of Optical PICK- UP KMS-260A Creating Continuously Recorded DiscChecks Prior to Repairs Temperature Compensation Offset CheckLaser Power Check Specified ValueFocus Bias Check Play Checking MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Recording and Displaying the IOP InformationTraverse Adjustment Focus Bias Adjustment CD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Section Diagrams Circuit Boards LocationPB Digital out Block Diagrams BD SectionMDS-SD1 REC DigitalMain Section PBDigital outRECDigital Waveforms For schematic diagramsFor printed wiring boards 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 IC101IC152 BH6511FS-E2 Main Section IC201 UDA1341TS/N2IC301 LB1641 Connector Section IC774 P82B715TD.118 IC822 M62016FP-E1IC851 M5293L IC PIN Functions IC101 CXA2523AR RF Amplifier BD BoardPin No Pin Name Function IC701 M30610MC-A01FP System Control ∝CON Main Board CHAK-IN Section Exploded Views Case and Back Panel SectionPanel SW Board FL901 1-517-804-11 Indicator TUBE, FluorescentFront Panel Section 67 A-4724-619-A Panel BOARD, CompleteMechanism Deck Section MDM-5A Insulator F209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A HEAD, Over LightMotor ASSY, Sled Section Electrical Parts List Connector Connector Encoder Main Main FILTER, Line InductorLine Filter FeritePanel Panel SW MANUAL, Instruction CHINESESP,HK Hardware List Accessories & Packing Materials FILTER, Clamp Ferrite CoreMANUAL, Instruction English Screw +BSony Corporation