Sony MDS-JE770 Fldt, Flck, A1-IN, Sircs, Byte, Cnvss, Xin-T, Xout-T, Rst, Vcc, Nmi, Down, Kb.Clk

Page 56

MDS-JE770

• IC1 M30803MG-106FP SYSTEM CONTROL (MAIN BOARD)

Pin No.

Pin Name

I/O

Description

 

 

 

 

1

FLDT

O

Serial data signal output to the display driver.

 

 

 

 

2

FLCK

O

Serial clock signal output to the display driver. L: Active

 

 

 

 

3

A1-IN

I

A1 Control input.

 

 

 

 

4

SIRCS

I

Remote control input.

 

 

 

 

5 - 7

NC

—

Not used.

 

 

 

 

8

BYTE

I

Data bus changed input. (Connected to ground.)

 

 

 

 

9

CNVSS

—

Ground.

 

 

 

 

10

XIN-T

I

Not used . (open)

 

 

 

 

11

XOUT-T

O

Not used . (open)

 

 

 

 

12

S.RST

I

System rest input. L : reset

 

 

 

 

13

XOUT

O

Main clock output. (10MHz)

 

 

 

 

14

GND

—

Ground.

 

 

 

 

15

XIN

I

Main clock input. (10MHz)

 

 

 

 

16

VCC

I

Power supply. (+3.3V)

 

 

 

 

17

NMI

I

Fixed at H.

 

 

 

 

18

DQSY

I

Digital In U-bit format or MD format subcode Q sync (SCOR) input to CXD2662R.

 

 

 

 

19

P.DOWN

I

Power down detection input. L: Power down

 

 

 

 

20

SQSY

I

Subcode Q (SCOR) sync input from CXD2662R.

 

 

 

 

21

KB.CLK

O

Keyboard clock output.

 

 

 

 

22

KB.DATA

I

Keyboard data output.

 

 

 

 

23

IIC BUSY

I

IIC busy signal input.

 

 

 

 

24

A1 OUT

O

A1 control signal output.

 

 

 

 

25

XINIT

I

Interrupt status input from CXD2662R.

 

 

 

 

26

*BEEP

O

Not used. (open)

 

 

 

 

27

LRCKI

O

Not used. (open)

 

 

 

 

28

IIC POWER

O

IIC start-up check.

 

 

 

 

29

IIC CLK

O

IIC serial clock output.

 

 

 

 

30

IIC DATA

I/O

IIC serial data input/output.

 

 

 

 

31

SWDT

O

Writing data signal output to CXD2662R and AK4524.

 

 

 

 

32

SRDT

I

Reading data signal input from CXD2662R.

 

 

 

 

33

SCLK

O

Clock signal output to CXD2662R and AK4524.

 

 

 

 

34

KB.CLK-CTRL

O

Keyboard clock ON/OFF signal output.

 

 

 

 

35

CLIP-TX

O

Not used. (open)

 

 

 

 

36

CLIP-RX

I

Not used. (open)

 

 

 

 

37

XBCK1

O

Not used. (open)

 

 

 

 

38

MUTE

O

Line out muting output. L: Mute

 

 

 

 

39

ADA.RESET

O

Reset signal output to the AK4524. L: Active

 

 

 

 

56

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Contents Specifications 873-890-11MDS-S50 MDM-7AGenera l Power requirements Supplied accessoriesMDS-JE770 SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Table of Contents DisassemblyDiagrams Exploded ViewsMDS-JE770 Section Service Notes Flexible Circuit Board RepairingJIG for Checking BD Board Waveform IOPRecord Precedure KSN-260E Optical PICK-UP Block Type DiscriminationMain Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset Retry Cause Display Mode Bit BinaryHexadecimal Binary Bit When BinaryHigher Bits Lower Bits Hexa Details 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 MDS-JE770 Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode Operating the Continuous Playback Mode MENU/NOTest Mode Displays Mode displayError rate display Functions of Other ButtonsWhen Memory NG is Displayed Meanings of Other DisplaysAutomatic SELF-DIAGNOSIS Function InformationCheck before replacement MDS-JE770 Section Electrical AdjustmentsParts Replacement and Adjustment Adjustment flow Auto Gain Control Output LevelPrecautions for Checking Laser Diode Emission Precautions for USE of Optical PICK- UP KMS-260B/260EPrecautions for Adjustments Temp AdjustUsing the Continuously Recorded Disc Checks Prior to RepairsAuto Check Other ChecksTraverse Check Traverse WaveformPlay Check MO Error Rate Check CD Error Rate CheckFocus Bias Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Traverse Adjustment Iop NV SaveFocus 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 MDS-JE770 Section Diagrams Circuit Boards LocationFor schematic diagrams For printed wiring boardsBD Board Main BoardIC190 Block Diagrams BD SectionIC171 IC1 2/2 Main SectionIC360 2/2 SemiconductorOVER SemiconductorOptical Pick UP Block Write HeadBoard Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams Model is printed on diagram IC1Display Board KB BoardKEY-SW Board HP BoardSchematic Diagram Display Section LED DriveRY910 C951 C952D910 CN921 C924 LF900 C910Schematic Diagram Power Section MainIC Block Diagrams IC101 CXA2523AR BD BoardIC500 AK4524 Main Board Pin No Pin Name Description IC PIN Function DescriptionIC101 CXA2523AR RF Amplifier BD Board Pin No Pin Name Desription Mvci AsyoAsyi AvddTfdr FfdrFrdr FS4IIC Power ADA.RESETFldt FlckADA. Latch EPNDINT1/H Clip ProtectTimer STBBeep SW REC FlcsReset VDISP1VFL1 OSC0Section Exploded Views Chassis SectionFL750 1-517-987-11 Indicator TUBE, Fluorescent Not supplied Supplied with J790 FL750 With RV790Mechanism MDM-7A HEAD, Over Light Motor ASSY, SpindleMotor ASSY, Sled Motor ASSY, LoadingMDS-JE770 Section Electrical Parts List Switch Metal ChipJumper Resistor 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
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