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Sony MDS-JB920 service manual 41, 42, BLOCK DIAGRAM – SERVO Section

Models: MDS-JB920

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Page 40

BLOCK DIAGRAM – SERVO Section –

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

Sony MDS-JB920 service manual 41, 42, BLOCK DIAGRAM – SERVO Section

Contents

SPECIFICATIONS SERVICE MANUALMDS-JB920 MINI DISC DECKSELF-DIAGNOSISFUNCTION – 2 –Items of Error History Mode Items and Contents – 3 –Table of Error Codes Selecting the Test ModeTABLE OF CONTENTS 6.DIAGRAMSSECTION SERVICING NOTES DISASSEMBLY– 5 – Flexible Circuit Board RepairingNotes on chip component replacement ADVARSELJIG FOR CHECKING BD BOARD WAVEFORM Record Precedure – 7 –Display Precedure Checks Prior to Parts Replacement and Adjustments Forced Reset– 8 – Procedure– 9 – Retry Cause Display ModePrecedure Fig. 1 Reading the Test Mode DisplayReading the Display – 10 –Hexadecimal nBinary Conversion Table SECTION GENERAL – 11 –LOCATION OF CONTROLS • Front view • Rear view– 12 – – 13 – – 14 – CASEDISASSEMBLY SECTIONFRONT PANEL SECITON – 15 –MAIN BOARD MECHANISM SECTION MDM-5A – 16 –SLIDER CAM BASE UNIT MBU-5A,BD BOARD – 17 –SW BOARD, LOADING MOTOR M103 1. PRECAUTIONS FOR USE OF TEST MODE 2. SETTING THE TEST MODESECTION TEST MODE – 18 –– 19 – 5. SELECTING THE TEST MODE5-1.Operating the Continuous Playback Mode – 20 –5-3. Non-VolatileMemory Mode EEP MODE – 21 – 6. FUNCTIONS OF OTHER BUTTONS7. TEST MODE DISPLAYS 4.Auto gain display Not used in servicing– 22 – MEANINGS OF OTHER DISPLAYS1.PARTS REPLACEMENT AND ADJUSTMENT SECTION ELECTRICAL ADJUSTMENTS– 23 – 2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSINON 4. PRECAUTIONS FOR ADJUSTMENTSLaser power meter – 24 –– 25 – 6. CHECK PRIOR TO REPAIRS6-1.Temperature Compensation Offset Check Checking Procedure– 26 – 6-5.C PLAY Checking MO Error Rate CheckCD Error Rate Check 6-4.Focus Bias Check7. INITIAL SETTING OF ADJUSTMENT VALUE 9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT10. LASER POWER ADJUSTMENT – 27 –11. TRAVERSE ADJUSTMENT SpecificationAdjusting Procedure Connection12.FOCUS BIAS ADJUSTMENT – 29 –13.ERROR RATE CHECK 15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT– 30 – 14. FOCUS BIAS CHECK16. ADJUSTING POINTS AND CONNECTING POINTS – 31 –BD BOARD SIDE A BD BOARD SIDE B– 32 – SECTION DIAGRAMS6-1.IC PIN FUNCTION DESCRIPTION – 33 – •BD BOARD IC121 CXD2654R– 34 – – 35 – – 36 – •MAIN BOARD IC100 CXD8607N A/D CONVERTER– 37 – – 38 – – 39 – MDS-JB920– 40 – BLOCK DIAGRAM – SERVO Section – – 41 –– 42 – MDS-JB9206-3.BLOCK DIAGRAM – MAIN Section – – 43 –– 44 – MDS-JB920– 45 – – 46 –• Circuit Boards Location Note on Schematic Diagram6-5.PRINTED WIRING BOARDS – BD Section – – 47 –– 48 – •See page 45 for Circuit Boards Location– 49 – – 50 –MDS-JB920 Page6-7.SCHEMATIC DIAGRAM – BD Section 2/2 – See• – 51 –– 52 – MDS-JB920– 53 – – 54 –MDS-JB920 • Waveforms– 55 – – 56 –MDS-JB920 Page Page Page Page Page Page– 58 – – 57 –MDS-JB920 – 59 – – 60 –MDS-JB920 Page Page Page Page– 62 – – 61 –MDS-JB920 MDS-JB920 – 63 –• Semiconductor Location – 66 – MDS-JB920US, CND US, CND– 67 – – 68 –MDS-JB920 Page Page Page Page6-15.SCHEMATIC DIAGRAM - BD SWITCH Section PRINTED WIRING BOARD – BD SWITCH Section –– 69 – – 70 –– 71 – IC121CXD2654R IC152 BH6511FS-E2– 72 – – MAIN Board –IC100 CXD8607NIC200 – 73 –CXD8767N IC300 SN74HC153ANSIC700 LA5632SECTION EXPLODED VIEWS – 75 –1 CHASSIS SECTION 56 2 16 17 182 FRONT PANEL SECTION 63 – 76 –59 58 – 77 – 3MECHANISM SECTION MDM-5A223 207 203 225 206 2014BASE UNIT SECTION MBU-5A 252 – 78 –254 AC BAT BD SECTION ELECTRICAL PARTS LIST– 79 – – 80 – DISP – 81 –MAIN – 82 –MAIN – 84 – MAIN– 85 – MAINMAIN SW VOL – 87 –MDS-JB920 Sony Corporation9-922-869-11 Home A&V Products Company