Sony MDS-JE770 specifications JIG for Checking BD Board Waveform, Iop

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MDS-JE770

JIG FOR CHECKING BD BOARD WAVEFORM

The special jig (J-2501-196-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)
TE	: TRK error signal (Traverse adjustment)
VC	: Reference level for checking the signal
RF	: RF signal (Check jitter)
FE	: Focus error signal

CN105

IOP

TE

VC

I+3V

GND

FE

RF

1

I+3V

IOP

GND TE FE VC

RF

7

I+3V
Iop
GND	for
TE	MDM-7A
FE
VC
RF

6

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Contents MDS-S50 Specifications873-890-11 MDM-7AMDS-JE770 Genera l Power requirementsSupplied accessories SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Diagrams Table of ContentsDisassembly Exploded ViewsMDS-JE770 Section Service Notes Flexible Circuit Board RepairingJIG for Checking BD Board Waveform IOPRecord Precedure KSN-260E Optical PICK-UP Block Type DiscriminationChecks Prior to Parts Replacement and Adjustments Forced ResetMain Board Component Side Retry Cause Display Mode Bit BinaryBit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary MDS-JE770 Section General Button DescriptionsMDS-JE770 Section Disassembly Disassembly FlowFront Panel Section Main Board Two screwsMechanism Deck Section MDM-7A Over Light Head HR901, BD BoardHolder Assy Loading Motor Assy M103Sled Motor Assy M102, Slider Optical PICK-UPSpindle Moter Assy M101 Setting the Test Mode MDS-JE770 Section Test ModePrecautions for USE of Test Mode Exiting the Test ModeSelecting the Test Mode Operating the Continuous Playback Mode MENU/NOError rate display Test Mode DisplaysMode display Functions of Other ButtonsAutomatic SELF-DIAGNOSIS Function When Memory NG is DisplayedMeanings of Other Displays InformationMDS-JE770 Section Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement Adjustment flow Auto Gain Control Output LevelPrecautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B/260E Temp AdjustUsing the Continuously Recorded Disc Checks Prior to RepairsTraverse Check Auto CheckOther Checks Traverse WaveformFocus Bias Check Play Check MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Traverse Adjustment Iop NV SaveFocus 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 MDS-JE770 Section Diagrams Circuit Boards LocationBD Board For schematic diagramsFor printed wiring boards Main BoardBlock Diagrams BD Section IC171IC190 Main Section IC360 2/2IC1 2/2 Optical Pick UP Block SemiconductorOVERSemiconductor Write HeadBoard Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams Model is printed on diagram IC1KEY-SW Board Display BoardKB Board HP BoardSchematic Diagram Display Section LED DriveD910 RY910C951 C952 CN921 C924 LF900 C910Schematic Diagram Power Section MainIC Block Diagrams IC101 CXA2523AR BD BoardIC500 AK4524 Main Board IC PIN Function Description IC101 CXA2523AR RF Amplifier BD BoardPin No Pin Name Description Pin No Pin Name Desription Asyi MvciAsyo AvddFrdr TfdrFfdr FS4Fldt IIC PowerADA.RESET FlckDINT1/H Clip ADA. LatchEPN ProtectBeep SW TimerSTB REC FlcsVFL1 ResetVDISP1 OSC0Section Exploded Views Chassis SectionFL750 1-517-987-11 Indicator TUBE, Fluorescent Not supplied Supplied with J790 FL750 With RV790Mechanism MDM-7A Motor ASSY, Sled HEAD, Over LightMotor ASSY, Spindle Motor ASSY, LoadingMDS-JE770 Section Electrical Parts List Jumper Resistor SwitchMetal Chip ShortMDS-JE770 Display HP KB KEY-SW KEY-SW Main MDS-JE770 Main 2SD2144S-TP-UVW Resistor MDS-JE770 Main PT VOL-SELMemo MDS-JE770 Revision History