Sony MDS-JE770 specifications Pin No Pin Name Desription

Page 53

MDS-JE770

• IC151 CXD2662R Digital Signal Processor, Digital Servo Signal Processor (BD BOARD)

Pin No.

Pin Name

I/O

 

 

 

 

Desription

 

 

 

 

 

 

 

 

1

MNT0 (FOK)

O

 

Not used (open)

 

 

 

 

 

2

MNT1 (SHCK)

O

 

Track jump detection signal output to the system control

 

 

 

 

 

 

 

 

3

MNT2 (XBUSY)

O

 

In the state of executire command signal output

 

 

 

 

 

 

 

 

4

MNT3 (SLOC)

O

 

Not used (open)

 

 

 

 

 

 

 

 

5

SWDT

I

 

Writing data signal input from the system control

 

 

 

 

 

 

 

 

6

SCLK

I (S)

 

Serial clock signal input from the system control

 

 

 

 

 

 

 

 

7

XLAT

I (S)

 

Serial latch signal input from the system control

 

 

 

 

 

 

 

 

8

SRDT

O (3)

 

Reading data signal output to the system control

 

 

 

 

 

 

 

 

9

SENS

O (3)

 

Internal status (SENSE) output to the system control

 

 

 

 

 

 

 

 

10

XRST

I (S)

 

Reset signal input from the system control “L”: Reset

 

 

 

 

 

 

 

 

11

SQSY

O

 

Subcode Q sync (SCOR) output to the system control

 

“L” is output every 13.3 msec. Almost all, “H” is output

 

 

 

 

 

 

 

 

 

 

 

 

12

DQSY

O

 

Digital In U-bit CD format or MD format subcode Q sync (SCOR) output to the system

 

control

 

 

 

 

 

 

 

 

 

 

 

 

13

RECP

I

 

Laser power switching input from the system control “H”: Recording, “L”: Playback

 

 

 

 

 

 

 

 

14

XINT

O

 

Interrupt status output to the system control

 

 

 

 

 

 

 

 

15

TX

O

 

Recording data output enable input from the system control

 

 

 

 

 

 

 

 

16

OSCI

I

 

System clock input (512Fs=22.5792 MHz)

 

 

 

 

 

 

 

 

17

OSCO

O

 

System clock output (512Fs=22.5792 MHz) (Not used)

 

 

 

 

 

 

 

 

18

XTSL

I

 

System clock frequency setting “L”: 45.1584 MHz, “H”: 22.5792 MHz (Fixed at “H”)

 

 

 

 

 

 

 

 

19

DIN0

I

 

Digital audio input (Optical input)

 

 

 

 

 

 

 

 

20

DIN1

I

 

Digital audio input (Optical input) (Not used)

 

 

 

 

 

 

 

 

21

DOUT

O

 

Digital audio output (Optical output) (Not used)

 

 

 

 

 

 

 

 

22

DADTI

I

 

Serial data input

 

 

 

 

 

 

 

 

23

LRCKI

I

 

LR clock input “H” : Lch, “L” : R ch

 

 

 

 

 

 

 

 

24

XBCKI

I

 

Serial data clock input

 

 

 

 

 

 

 

 

25

ADDT

I

 

Data input from the A/D converter

 

 

 

 

 

26

DADT

O

 

Data output to the D/A converter

 

 

 

 

 

 

 

 

27

LRCK

—

 

LR clock output for the A/D and D/A converter (44.1 kHz)

 

 

 

 

 

 

 

 

28

XBCK

O

 

Bit clock output to the A/D and D/A converter (2.8224 MHz)

 

 

 

 

 

 

 

 

29

FS256

O

 

11.2896 MHz clock output (Not used)

 

 

 

 

 

 

 

 

30

DVDD

I

 

+3V power supply (Digital)

 

 

 

 

 

31 - 34

A03 to A00

O

 

DRAM address output

35

A10

O

 

DRAM address output (Not used)

36 - 40

A04 to A08

O

 

DRAM address output

 

 

 

 

 

 

 

 

41

A11

O

 

DRAM address output (Not used)

 

 

 

 

 

 

 

 

42

DVSS

—

 

Ground (Digital)

 

 

 

 

 

 

 

 

43

XOE

O

 

Output enable output for DRAM

 

 

 

 

 

 

 

 

44

XCAS

O

 

CAS signal output for DRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

A09

O

 

Address output for DRAM

46

XRAS

O

 

RAS signal output for DRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

47

XWE

O

 

Write enable signal output for DRAM

 

 

 

 

 

 

 

 

* I (S) stands for Schmidt input, I (A) for analog input, O (3) for 3-state output, and O (A) for analog output in the column I/O

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Contents 873-890-11 SpecificationsMDS-S50 MDM-7ASupplied accessories Genera l Power requirementsMDS-JE770 SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Disassembly Table of ContentsDiagrams Exploded ViewsFlexible Circuit Board Repairing MDS-JE770 Section Service NotesIOP JIG for Checking BD Board WaveformRecord Precedure Optical PICK-UP Block Type Discrimination KSN-260EMain Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset Bit Binary Retry Cause Display ModeHexadecimal Binary Bit When BinaryHigher Bits Lower Bits Hexa Details Button Descriptions MDS-JE770 Section GeneralDisassembly Flow MDS-JE770 Section DisassemblyFront Panel Section Two screws Main BoardOver Light Head HR901, BD Board Mechanism Deck Section MDM-7ALoading Motor Assy M103 Holder AssyOptical PICK-UP Sled Motor Assy M102, SliderSpindle Moter Assy M101 Precautions for USE of Test Mode MDS-JE770 Section Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode MENU/NO Operating the Continuous Playback ModeMode display Test Mode DisplaysError rate display Functions of Other ButtonsMeanings of Other Displays When Memory NG is DisplayedAutomatic SELF-DIAGNOSIS Function InformationCheck before replacement MDS-JE770 Section Electrical AdjustmentsParts Replacement and Adjustment Auto Gain Control Output Level Adjustment flowPrecautions for USE of Optical PICK- UP KMS-260B/260E Precautions for Checking Laser Diode EmissionPrecautions for Adjustments Temp AdjustChecks Prior to Repairs Using the Continuously Recorded DiscOther Checks Auto CheckTraverse Check Traverse WaveformCD Error Rate Check Play Check MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Iop NV Save Traverse AdjustmentFocus Bias Adjustment Auto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Circuit Boards Location MDS-JE770 Section DiagramsFor printed wiring boards For schematic diagramsBD Board Main BoardIC190 Block Diagrams BD SectionIC171 IC1 2/2 Main SectionIC360 2/2 Semiconductor SemiconductorOVEROptical Pick UP Block Write HeadBoard Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams IC1 Model is printed on diagramKB Board Display BoardKEY-SW Board HP BoardLED Drive Schematic Diagram Display SectionC951 C952 RY910D910 CN921 C924 LF900 C910Main Schematic Diagram Power SectionIC101 CXA2523AR BD Board IC Block DiagramsIC500 AK4524 Main Board Pin No Pin Name Description IC PIN Function DescriptionIC101 CXA2523AR RF Amplifier BD Board Pin No Pin Name Desription Asyo MvciAsyi AvddFfdr TfdrFrdr FS4ADA.RESET IIC PowerFldt FlckEPN ADA. LatchDINT1/H Clip ProtectSTB TimerBeep SW REC FlcsVDISP1 ResetVFL1 OSC0Chassis Section Section Exploded ViewsNot supplied Supplied with J790 FL750 With RV790 FL750 1-517-987-11 Indicator TUBE, FluorescentMechanism MDM-7A Motor ASSY, Spindle HEAD, Over LightMotor ASSY, Sled Motor ASSY, LoadingMDS-JE770 Section Electrical Parts List Metal Chip SwitchJumper Resistor ShortMDS-JE770 Display HP KB KEY-SW KEY-SW Main MDS-JE770 Main 2SD2144S-TP-UVW Resistor VOL-SEL MDS-JE770 Main PTMemo MDS-JE770 Revision History
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