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Sony MDS-JB920 service manual 76, Front Panel, 59 58

Models: MDS-JB920

1 72

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Page 60

(2) FRONT PANEL SECTION

(2) FRONT PANEL SECTION

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	supplied with J790				62
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			supplied with RV790			72
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			56		supplied with
			75		supplied with
			75		RV760
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#1

Ref. No.

Part No.

Description

Remark

514-998-590-01 PANEL, FRONT (BLACK)

514-998-590-31 PANEL, FRONT (SILVER)

524-942-568-41 EMBLEM (NO.5), SONY

534-998-607-01 INDICATOR (POWER)

544-998-606-01 INDICATOR (MEGA)

554-950-189-01 KNOB (A) (VOL)

564-998-598-01 WINDOW (DISPLAY)

574-996-687-51 KNOB (AMS) (BLACK)

584-998-597-01 KNOB (ANALOG) (BLACK)

584-998-597-21 KNOB (ANALOG) (SILVER)

594-998-596-01 KNOB (DIGITAL) (BLACK)

594-998-596-21 KNOB (DIGITAL) (SILVER)

603-382-627-11 SPRING, RING

61X-4949-651-1 BASE ASSY, PANEL (BLACK)

61X-4950-253-2 BASE ASSY, PANEL (SILVER)

623-704-515-21 SCREW (BV/RING)

*63 1-669-996-11 HP BOARD

644-998-592-01 BUTTON (POWER) (BLACK)

644-998-592-21 BUTTON (POWER) (SILVER)

Ref. No.

Part No.

Description

Remark

654-997-211-01 BUTTON (MODE) (BLACK)

654-997-211-21 BUTTON (MODE) (SILVER)

664-996-690-11 LID (CARTRIDGE) (SILVER)

664-996-690-21 LID (CARTRIDGE) (BLACK)

674-976-593-01 SPRING (LID), TORSION

684-998-593-01 BUTTON (EDIT) (BLACK)

684-998-593-21 BUTTON (EDIT) (SILVER)

*69 1-669-997-11 VOL BOARD

704-998-595-01 KNOB (SLIDE) (BLACK)

70 4-998-595-21 KNOB (SLIDE) (SILVER)

*71 1-669-995-11 PSW BOARD

*72 A-4724-044-A DISP BOARD, COMPLETE (AEP, UK)

* 72	DISP BOARD, COMPLETE (US, Canadian)

734-998-594-01 BUTTON (EJECT) (BLACK)

734-998-594-21 BUTTON (EJECT) (SILVER)

744-996-689-21 BUTTON (MAIN) (BLACK)

744-996-689-51 BUTTON (MAIN) (SILVER)

753-354-981-01 SPRING (SUS), RING

– 76 –

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Sony MDS-JB920 service manual 76, Front Panel, 59 58

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 – 7 – Record PrecedureDisplay Precedure Checks Prior to Parts Replacement and Adjustments Forced Reset– 8 – Procedure– 9 – Retry Cause Display ModePrecedure Fig. 1 Reading the Test Mode Display– 10 – Reading the DisplayHexadecimal nBinary Conversion Table SECTION GENERAL – 11 –LOCATION OF CONTROLS • Front view • Rear view– 12 – – 13 – – 14 – CASEDISASSEMBLY SECTION– 15 – FRONT PANEL SECITONMAIN BOARD – 16 – MECHANISM SECTION MDM-5ASLIDER CAM – 17 – BASE UNIT MBU-5A,BD BOARDSW BOARD, LOADING MOTOR M103 1. PRECAUTIONS FOR USE OF TEST MODE 2. SETTING THE TEST MODESECTION TEST MODE – 18 –– 19 – 5. SELECTING THE TEST MODE– 20 – 5-1.Operating the Continuous Playback Mode5-3. 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 DISPLAYSSECTION ELECTRICAL ADJUSTMENTS 1.PARTS REPLACEMENT AND ADJUSTMENT– 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 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 – 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– 57 – – 58 –MDS-JB920 – 59 – – 60 –MDS-JB920 Page Page Page Page– 61 – – 62 –MDS-JB920 – 63 – MDS-JB920• 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 CXD8607N– 73 – IC200CXD8767N IC300 SN74HC153ANSIC700 LA5632SECTION EXPLODED VIEWS – 75 –1 CHASSIS SECTION 56 2 16 17 18– 76 – 2 FRONT PANEL SECTION 6359 58 – 77 – 3MECHANISM SECTION MDM-5A223 207 203 225 206 201– 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 –MDS-JB920 Sony Corporation9-922-869-11 Home A&V Products Company