Sony MDS-JB920 service manual Block Diagram Servo Section, ∙ Signal Path, REC Analog, REC Digital

Page 40

MDS-JB920

6-2.

BLOCK DIAGRAM – SERVO Section –

15

IC121 (1/2)

TX

OVER WRITE

100

EFMO

ADDT

25

ADDT

A

(Page 43)

HEAD DRIVE

HR901

IC181, Q181, 182

DATAI

22

DIGITAL SIGNAL PROCESSOR,

FILI

SAMPLING

OVER WRITE HEAD

SCTX

60

XBCKI

EFM/ACIRC ENCODER/DECODER,

FILTER

59

PCO

RATE

24

SHOCK PROOF MEMORY CONTROLLER,

CLTV

PLL

MEMORY CONTROLLER

CONVERTER

LRCKI

ATRAC ENCODER/DECODER

62

EFM/ACIRC ENCODER/DECODER

ATRAC ENCODER/DECODER

23

61

FILO

SHOCK PROOF

IC121 (1/2)

RF AMP,

FOCUS/TRACKING ERROR AMP

DIN0

19

DIGITAL IN

B

(Page 44)

48

47

IC101

DIGITAL

ASYO

AUDIO

DIN1

20

53

DOUT

DIGITAL OUT

C

(Page 44)

MORFO

MORFI

INTERFACE

21

I

1

I

AGCI

RF

54

ASYI

COMPA-

DADT

26

J

J

RFO

46

RF AGC

57

RFI

RATOR

RF AMP

40

38

2

& EQ

DADT, BCK, LRCK

D

(Page 43)

EQ

28 27 29

B.P.F.

AUX

XBCK LRCK FS256

33

512FS

WBL

OSCI

512FS

E

(Page 43)

F

3T

TEMP

PEAK

CLOCK

16

OSC

PEAK &

GENERATOR

OSCO

17

IC123

B

37

BOTTOM

BOTM

WBL

36

C

B

SUBCODE

INTERNAL BUS

D0 – D3

J

I

A

AT

ADFM

ADIN

ADFG

ADIP

PROCESSOR

D

B.P.F.

78

A

AMP

29

30

32

DEMODULATOR/

4

A

ADFG

DECODER

49, 48,50,51

1, 2, 18,19

DQ1DQ4–

B

5

I-V

ABCD

E

C

ABCD

6

AMP

DETECTOR

D

AMP

35

CPU

MONITOR

A00 – A09

D-RAM

7

FOCUS

FE

C

79

F0CNT

SPINDLE

INTERFACE

CONTROL

– 31, 36 – 40, 45

IC124

ERROR AMP

34

– 9, 11 – 15, 5

D

SERVO

E

8

E

I-V

TRACKING

TE

SPFD

SPRD

XRST

DQSY

SQSY

XINT

SENS

SRDT

SWDT

SCLK

XLAT

MNT0

MNT1

MNT2

MNT3

A0 – A9

26

F

9

F

AMP

ERROR AMP

SE 28

LASER DIODE

COMMAND

94

93

10

12

11

14

9

8

5

6

7

1

2

3

4

34

6

SHOCK

ILCC

AUTOMATIC

APC

LD/PD

WBL 3T

EQ

FOK

XBUSY

SLOCK

XOE

POWER

11

43

16

XOE

XWE

CONTROL

AMP

SERIAL/

SWDT

47

3

XWE

PD

LD

Q162, 163

XRAS

PARALLEL

46

4

XRAS

V-I

SCLK

XCAS

CONVERTER,

44

17 XCAS

CONVERTER

DECODER

PD

LASER ON

10

PD

APCREF

F0CNT

SWDT

SWITCH

SCLK XLAT

Q101

SWDT, SCLK

F

(Page 43)

12

20

16 17 18

18

5

20 55 32

31 33 70

67 54 52 60

OPTICAL PICK-UP

(KMS-260A/J1N)

SQSY

XINT

SENS

SRDT

SWDT

SCLK

XLATCH

MNT0 (FOK) MNT1(SHOCK) MNT2(XBUSY) MNT3(SLOCK)

SCTX

65

FOCUS/TRACKING COIL DRIVE,

∙ SIGNAL PATH

SPINDLE/SLED MOTOR DRIVE

56

LDON

SYSTEM CONTROLLER

IC152

DQSY

: PLAY (ANALOG OUT)

IC800 (1/2)

PSB 16

: PLAY (DIGITAL OUT)

53

DIG-RST

: REC (ANALOG IN)

59

WR-PWR

LDIN

LDOUT

: REC (DIGITAL IN)

69

MOD

SPFD

78

79

M101

M

6

OUT4F

IN4R

3

S101

SPRD

LIMIT-IN

68

(SPINDLE)

8

OUT4R

IN4F

4

13

67 65 66 75 74 63 64

(LIMIT IN)

RECP

AUX1

ABCD FE TE SE

PEAK

BOTM

S601

5

6

REC-P

77

83 APCREF

AUTOMATIC

(REC POSITION)

IN1

IN2

POWER

LOADING

REFERENCE

S602

SFDR

CONTROL

ANALOG MUX

VZ

4

B+

PACK-OUT

76

M102

M

27

OUT2F

IN2F

29

92

MOTOR DRIVE

VOLTAGE SWITCH

(PACK OUT)

SRDR

IC400

OUT1

OUT2

Q400, 401

(SLED)

25 OUT2R

IN2R

30

91

S603

CHACK IN

75

2

10

A/D CONVERTER

(CHUCKING IN)

GENERATOR

80 LD-LOW

DIGITAL

S604

SERVO

PB-P

74

2-AXIS

M

(PLAY POSITION)

SIGNAL

FROM CPU

DEVICE

FCS+

FFDR

PROCESS

21 OUT1F

IN1F

19

88

INTERFACE

M103

REFLECT

57

(TRACKING)

23 OUT1R

IN1R

18

89

FRDR

PWM

(LOADING)

(FOCUS)

PROTECT

58

XLRF

XLAT

80

AUTO

CKRF

SCLK

S102

81

FCS–

SEQUENCER

DTRF

SWDT

(REFLECT/PROTECT DETECT)

82

TRK+

TFDR

HIGH REFELECT RATE/

12 OUT3F

IN3F

14

86

TRK–

TRDR

DIGITAL SERVO

HF MODULE

WRITE PROTECT

10 OUT3R

IN3R

15

85

SIGNAL PROCESSOR

IC121 (2/2)

SWITCH

LOW REFELECT RATE/

IC103, Q102 – 104

UN-PROTECT

HF MODULE

MOD

05

– 41 –

– 42 –

Image 40

Contents MDS-JE520 SpecificationsMDM-5A SELF-DIAGNOSIS Function GeneralItems of Error History Mode Items and Contents Diagrams Table of ContentsSection Servicing Notes Varning Flexible Circuit Board RepairingVaroitus JIG for Checking BD Board Waveform IOPRecord Precedure Forced Reset Checks Prior to Parts Replacement and AdjustmentsREC/PLAY Retry Cause Display Mode PrecedureHexadecimal nBinary Conversion Table Location of Controls Section GeneralFront view Rear view Page Page Section Disassembly CaseFront Panel Seciton Main BoardMechanism Section MDM-5A Slider CAMBase Unit MBU-5A, BD Board SW BOARD, Loading Motor M103Section Test Mode Precautions for USE of Test ModeSetting the Test Mode Exiting the Test ModeSelecting the Test Mode Display Contents Mark GroupNon-Volatile Memory Mode EEP Mode Operating the Continuous Playback ModeMID Test Mode Displays Functions of Other ButtonsAuto gain display Not used in servicing Detrack check display Not used in servicingDisplay Contents When Lit When Off Meanings of Other DisplaysSection Electrical Adjustments Parts Replacement and AdjustmentPrecautions for Checking Laser Diode Emissinon Precautions for USE of Optical PICK-UP KMS-260APrecautions for Adjustments Laser power meterTemperature Compensation Offset Check Laser Power CheckCheck Prior to Repairs Traverse CheckPlay 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 BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP Section DiagramsIC PIN Function Description Srdt SensXrst SqsyXras XWEMvci AsyoSrdr SfdrSprd SpfdMain Board IC100 CXD8607N A/D Converter Avddl VDD1TEST2 LvddMain Board IC800 M30610MCA-264FP System Controller MDS-JB920 Block Diagram Servo Section ∙ Signal PathREC Analog REC Digital∙ Signal Path Play Analog OUT Block Diagram Main SectionPlay Digital OUT Circuit Boards Location Printed Wiring Boards BD Section MDS-JB920 Schematic Diagram BD /2 See 53 for Waveforms. See page 70 and 71 for IC Block DiagramsWaveforms BD board Main board Disp board MDS-JB920 MDS-JB920 MDS-JB920 MDS-JB920 Other layers pattern Side a US, CND Schematic Diagram Panel Section See page 54 for Waveforms Schematic Diagram BD Switch Section Printed Wiring Board BD Switch SectionIC Block Diagrams BD Board IC101 CXA2523ARIC121 CXD2654R IC152 BH6511FS-E2Main Board IC100 CXD8607N IC101 CXA8054MIC203 CXA8042ASIC200 CXD8767N SN74HC153ANS SN74HCU04ANS-E20Section Exploded Views Chassis SectionFront Panel Section Supplied with RV760204 205 206 201209 4-988-466-21 Spring ELECTROSTATIC, Leaf Base Unit Section MBU-5A Section Electrical Parts List TANTAL. Chip DiodeDiode F1J6TP CXA2523ARDisp Main C252 Mylar HZS6C1L HZ7.5CP-TKCXA8042AS SN74HC153ANS390 Main PSW Coil with Core VibratorLED SEL6210S-TH10 Standby LED SEL6810A-TH10 Mega Control TransistorSW VOL Sony Corporation