Manuals / Sony / Home Audio / Stereo System

Sony MDS-JB920 IC300, SN74HC153ANS, IC700, LA5632, IC301, SN74HCU04ANS-E20, IC400, LB1641, IC701

Models: MDS-JB920

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IC300

SN74HC153ANS

IC700

LA5632

DATA INPUTS

STROBE

OUTPUT

PH5

VCC

SELECT

2C3

2C2

2C1

2C0

–

2C3

2C2

2C1

2C0

STBY

VCC

ANA5

–

SYS3.3

–

1C3

1C2

1C1

1C0

B.BAK

3.3V

STROBE

1C3

1C2

1C1

1C0

OUTPUT GND

SELECT

CD1

DATA INPUTS

DELAY

–

P. DOWN

CIRCUIT

IC301, 704

SN74HCU04ANS-E20

GND

VCC

CD2

DELAY

–

S. RESET

CIRCUIT

VREF

GND

IC400

LB1641

T.S.D

O.C.P

MOTOR

DRIVE

FWD/REV/STOP

CONTROL LOGIC

GND

MOTOR

DRIVE

NOISE

FILTER

CLAMP

FWD.IN

REV.IN

VCC 1

VCC 2

NOISE FILTER

MOTOR

DRIVE

IC701

M5293L

GND

REFERENCE

VOLTAGE

27k

OUT

ON/OFF

REFERENCE

–

VOLTAGE

OVERHEAT

OVERCURRENT

PROTECTION

LIMITTER

– 74 –

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Sony MDS-JB920 service manual IC300, SN74HC153ANS, IC700, LA5632, IC301, SN74HCU04ANS-E20, IC400, LB1641, IC701, M5293L

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 Record Precedure – 7 –Display Precedure – 8 – Checks Prior to Parts Replacement and AdjustmentsForced Reset ProcedurePrecedure – 9 –Retry Cause Display Mode Fig. 1 Reading the Test Mode DisplayReading the Display – 10 –Hexadecimal nBinary Conversion Table LOCATION OF CONTROLS SECTION GENERAL– 11 – • Front view • Rear view– 12 – – 13 – DISASSEMBLY – 14 –CASE 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 SECTION TEST MODE 1. PRECAUTIONS FOR USE OF TEST MODE2. SETTING THE TEST MODE – 18 –– 19 – 5. SELECTING THE TEST MODE5-1.Operating the Continuous Playback Mode – 20 –5-3. 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 DISPLAYS1.PARTS REPLACEMENT AND ADJUSTMENT SECTION ELECTRICAL ADJUSTMENTS– 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 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 – – 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– 58 – – 57 –MDS-JB920 MDS-JB920 – 59 –– 60 – Page Page Page Page– 62 – – 61 –MDS-JB920 MDS-JB920 – 63 –• 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 – CXD8607NIC200 – 73 –CXD8767N IC700 IC300SN74HC153ANS LA56321 CHASSIS SECTION 56 SECTION EXPLODED VIEWS– 75 – 2 16 17 182 FRONT PANEL SECTION 63 – 76 –59 58 223 207 203 225 – 77 –3MECHANISM SECTION MDM-5A 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 –9-922-869-11 MDS-JB920Sony Corporation Home A&V Products Company