Manuals / Sony / Home Audio / Stereo System

Sony MDS-JB920 service manual 22, Meanings Of Other Displays

Models: MDS-JB920

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MEANINGS OF OTHER DISPLAYS

Display		Contents
Display	When Lit		When Off
	When Lit		When Off

á	During continuous playback (CLV: ON)		STOP (CLV: OFF)
P	Tracking servo OFF		Tracking servo ON
REC	Recording mode ON		Recording mode OFF

–SYNC	CLV low speed mode		CLV normal mode
A.SPACE	ABCD adjustment completed

OVER	Tracking offset cancel ON		Tracking offset cancel OFF
B	Tracking auto gain OK

A-	Focus auto gain OK
TRACK	Pit		Groove
DISC	High reflection		Low reflection

DATE	CLV-S		CLV-A
CLOCK	CLV LOCK		CLV UNLOCK

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Sony MDS-JB920 service manual 22, Meanings Of Other Displays

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