Manuals / Sony / Home Audio / Stereo System

Sony MDS-JB920 69, 70, SCHEMATIC DIAGRAM - BD SWITCH Section, 6-16, • IC Block Diagrams, BD Board

Models: MDS-JB920

1 72

Download 72 pages 46.67 Kb

Page 54

6-15. SCHEMATIC DIAGRAM – BD SWITCH Section –

MDS-JB920

6-15. SCHEMATIC DIAGRAM – BD SWITCH Section –

• IC Block Diagrams

– BD Board –

IC101

CXA2523AR

MORFO

MORFI

RFO

OPN

OPO

ADDC

COMPP

COMPO

AGCI

RF AGC

RF

PEAK

48

47

46

45

44

43

42

41

40

39

38

37

USROP

MAIN BOARD (1/3)

–

+

RF AGC

EQ

+

CN401

RFA1

–

USRC

DET

EQ

(Page 55)

+ –

RFA2

RFA3

BPF3T

I

1

–

PEAK3T

AUX

1

HLPT

–1

3T

SW

–

P-P

–

2

–2

J

2

–

OFST

PTGR

3T

WBL

TEMP

PEAK

–

1

–2

CVB

–

BOTTOM

36

BOTM

+

–

2

–1

VC

3

GRV

PBH

–

GRVA

PBSW

WBL

35

ABCD

+

–

34

FE

A

4

33

AUX

–

IVR

–

AA

–

BPFC

–

ABCDA

32

ADFG

B

5

+

31

ADAGC

IVR

–

BB

+

+

30

ADIN

–

FEA

–

C

6

+

IVR

–

CC

DET

BPF22

6-16.

PRINTED WIRING BOARD – BD SWITCH Section –

–

ADIP

–

WBL

29

ADFM

•See page 45 for Circuit Boards Location.

+

ATA

AGC

D

7

+

+

IVR

–

DD

WBL

–1

TG

SE

–

PTGR

–2

28

E

8

+

SEA

+

EE'

IVR

–

EE

+

27

CSLED

–

–

EFB

+

TESW

–1

TG

TE

EBAL

–2

26

ESW

TEA

MAIN BOARD

F

9

+

CN401

+

(Page 63)

IVR

–

FF

WBL

–

FF'

3T

VI CONV

25

WBLADJ

IV

GSW

FBAL

EQ

PD

10

AUXSW

BGR

+

–

COMMAND

+

–

SCRI - PARA

VREF

APC

11

DECODE

APCREF

12

13

14

15

16

17

18

19

20

21

22

23

24

GND

TEMPI

TEMPR

SWDT

SCLK

XLAT

XSTBY

F0CNT

VREF

EQADJ

3TADJ

VCC

– 69 –

– 70 –

Image 54

Sony MDS-JB920 69, 70, SCHEMATIC DIAGRAM - BD SWITCH Section, 6-16, PRINTED WIRING BOARD – BD SWITCH Section, BD Board

Contents

MDS-JB920 SPECIFICATIONSSERVICE MANUAL MINI DISC DECKSELF-DIAGNOSISFUNCTION – 2 –Table of Error Codes Items of Error History Mode Items and Contents– 3 – Selecting the Test ModeSECTION SERVICING NOTES TABLE OF CONTENTS6.DIAGRAMS DISASSEMBLYNotes on chip component replacement – 5 –Flexible Circuit Board Repairing ADVARSELJIG FOR CHECKING BD BOARD WAVEFORM – 7 – Record PrecedureDisplay Precedure – 8 – Checks Prior to Parts Replacement and AdjustmentsForced Reset ProcedurePrecedure – 9 –Retry Cause Display Mode Fig. 1 Reading the Test Mode Display– 10 – Reading the DisplayHexadecimal nBinary Conversion Table LOCATION OF CONTROLS SECTION GENERAL– 11 – • Front view • Rear view– 12 – – 13 – DISASSEMBLY – 14 –CASE SECTION– 15 – FRONT PANEL SECITONMAIN BOARD – 16 – MECHANISM SECTION MDM-5ASLIDER CAM – 17 – BASE UNIT MBU-5A,BD BOARDSW BOARD, LOADING MOTOR M103 SECTION TEST MODE 1. PRECAUTIONS FOR USE OF TEST MODE2. SETTING THE TEST MODE – 18 –– 19 – 5. SELECTING THE TEST MODE– 20 – 5-1.Operating the Continuous Playback Mode5-3. Non-VolatileMemory Mode EEP MODE 7. TEST MODE DISPLAYS – 21 –6. FUNCTIONS OF OTHER BUTTONS 4.Auto gain display Not used in servicing– 22 – MEANINGS OF OTHER DISPLAYSSECTION ELECTRICAL ADJUSTMENTS 1.PARTS REPLACEMENT AND ADJUSTMENT– 23 – Laser power meter 2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSINON4. PRECAUTIONS FOR ADJUSTMENTS – 24 –6-1.Temperature Compensation Offset Check – 25 –6. CHECK PRIOR TO REPAIRS Checking ProcedureCD Error Rate Check – 26 –6-5.C PLAY Checking MO Error Rate Check 6-4.Focus Bias Check10. LASER POWER ADJUSTMENT 7. INITIAL SETTING OF ADJUSTMENT VALUE9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT – 27 –Adjusting Procedure 11. TRAVERSE ADJUSTMENTSpecification Connection12.FOCUS BIAS ADJUSTMENT – 29 –– 30 – 13.ERROR RATE CHECK15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 14. FOCUS BIAS CHECKBD BOARD SIDE A 16. ADJUSTING POINTS AND CONNECTING POINTS– 31 – BD BOARD SIDE BSECTION DIAGRAMS – 32 –6-1.IC PIN FUNCTION DESCRIPTION – 33 – •BD BOARD IC121 CXD2654R– 34 – – 35 – – 36 – •MAIN BOARD IC100 CXD8607N A/D CONVERTER– 37 – – 38 – MDS-JB920 – 39 –– 40 – – 42 – BLOCK DIAGRAM – SERVO Section –– 41 – MDS-JB920– 44 – 6-3.BLOCK DIAGRAM – MAIN Section –– 43 – MDS-JB920• Circuit Boards Location – 45 –– 46 – Note on Schematic Diagram– 48 – 6-5.PRINTED WIRING BOARDS – BD Section –– 47 – •See page 45 for Circuit Boards LocationMDS-JB920 – 49 –– 50 – Page– 52 – 6-7.SCHEMATIC DIAGRAM – BD Section 2/2 – See•– 51 – MDS-JB920MDS-JB920 – 53 –– 54 – • WaveformsMDS-JB920 – 55 –– 56 – Page Page Page Page Page Page– 57 – – 58 –MDS-JB920 MDS-JB920 – 59 –– 60 – Page Page Page Page– 61 – – 62 –MDS-JB920 – 63 – MDS-JB920• Semiconductor Location US, CND – 66 –MDS-JB920 US, CNDMDS-JB920 – 67 –– 68 – Page Page Page Page– 69 – 6-15.SCHEMATIC DIAGRAM - BD SWITCH SectionPRINTED WIRING BOARD – BD SWITCH Section – – 70 –CXD2654R – 71 –IC121 IC152 BH6511FS-E2IC100 – 72 –– MAIN Board – CXD8607N– 73 – IC200CXD8767N IC700 IC300SN74HC153ANS LA56321 CHASSIS SECTION 56 SECTION EXPLODED VIEWS– 75 – 2 16 17 18– 76 – 2 FRONT PANEL SECTION 6359 58 223 207 203 225 – 77 –3MECHANISM SECTION MDM-5A 206 201– 78 – 4BASE UNIT SECTION MBU-5A 252254 SECTION ELECTRICAL PARTS LIST AC BAT BD– 79 – – 80 – DISP – 81 –MAIN – 82 –MAIN – 84 – MAIN– 85 – MAINMAIN SW VOL – 87 –9-922-869-11 MDS-JB920Sony Corporation Home A&V Products Company