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Sony MDS-JB920 service manual 63, • Semiconductor Location

Models: MDS-JB920

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MDS-JB920

6-12. PRINTED WIRING BOARDS – MAIN Board (side B) , AC/BAT Boards – See• page 45 for Circuit Boards Location.

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Note:

• : Other layers pattern (Side A).

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• Semiconductor Location

	Ref. No.	Location	Ref. No.	Location
	(Page 65)	J-4	IC103	J-3
	D100	J-4	IC103	J-3
	D101	J-4	IC200	G-6
	D102	I-3	IC203	H-4
	D103	I-3	IC204	G-4
	D400	F-6	IC205	H-5
(Page 66)	D700	E-9	IC241	G-3
(Page 66)	D701	E-9	IC242	H-3
	D703	E-5	IC243	G-2
	D704	E-5	IC244	H-2
	D705	A-3	IC300	E-2
	D706	B-4	IC301	C-2
	D707	C-3	IC302	D-1
	D708	C-3	IC303	C-1
	D709	B-4	IC304	A-1
	D710	B-4	IC305	C-1
	D711	B-4	IC400	F-5
	D712	B-5	IC700	E-4
	D713	D-2	IC701	B-3
	D714	D-3	IC702	B-2
	D715	A-1	IC703	B-3
	D716	A-1	IC704	E-3
	D717	A-2	IC705	D-4
	D718	A-2	IC800	H-9
	D719	D-2
	D720	B-5	Q200	H-1
	D721	B-4	Q201	G-2
	D800	F-1	Q202	H-2
	L201	H-6	Q203	G-1
	L206	H-5	Q400	F-6
	IC100	J-6	Q401	F-6
	IC100	J-6	Q702	E-3
	IC101	J-4	Q800	F-1
	IC102	J-4
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Sony MDS-JB920 service manual 63, • Semiconductor Location

Contents

MINI DISC DECK SPECIFICATIONSSERVICE MANUAL MDS-JB920– 2 – SELF-DIAGNOSISFUNCTIONSelecting the Test Mode Items of Error History Mode Items and Contents– 3 – Table of Error CodesDISASSEMBLY TABLE OF CONTENTS6.DIAGRAMS SECTION SERVICING NOTESADVARSEL – 5 –Flexible Circuit Board Repairing Notes on chip component replacementJIG FOR CHECKING BD BOARD WAVEFORM – 7 – Record PrecedureDisplay Precedure Procedure Checks Prior to Parts Replacement and AdjustmentsForced Reset – 8 –Fig. 1 Reading the Test Mode Display – 9 –Retry Cause Display Mode Precedure– 10 – Reading the DisplayHexadecimal nBinary Conversion Table • Front view • Rear view SECTION GENERAL– 11 – LOCATION OF CONTROLS– 12 – – 13 – SECTION – 14 –CASE DISASSEMBLY– 15 – FRONT PANEL SECITONMAIN BOARD – 16 – MECHANISM SECTION MDM-5ASLIDER CAM – 17 – BASE UNIT MBU-5A,BD BOARDSW BOARD, LOADING MOTOR M103 – 18 – 1. PRECAUTIONS FOR USE OF TEST MODE2. SETTING THE TEST MODE SECTION TEST MODE5. SELECTING THE TEST MODE – 19 –– 20 – 5-1.Operating the Continuous Playback Mode5-3. Non-VolatileMemory Mode EEP MODE 4.Auto gain display Not used in servicing – 21 –6. FUNCTIONS OF OTHER BUTTONS 7. TEST MODE DISPLAYSMEANINGS OF OTHER DISPLAYS – 22 –SECTION ELECTRICAL ADJUSTMENTS 1.PARTS REPLACEMENT AND ADJUSTMENT– 23 – – 24 – 2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSINON4. PRECAUTIONS FOR ADJUSTMENTS Laser power meterChecking Procedure – 25 –6. CHECK PRIOR TO REPAIRS 6-1.Temperature Compensation Offset Check6-4.Focus Bias Check – 26 –6-5.C PLAY Checking MO Error Rate Check CD Error Rate Check– 27 – 7. INITIAL SETTING OF ADJUSTMENT VALUE9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT 10. LASER POWER ADJUSTMENTConnection 11. TRAVERSE ADJUSTMENTSpecification Adjusting Procedure– 29 – 12.FOCUS BIAS ADJUSTMENT14. FOCUS BIAS CHECK 13.ERROR RATE CHECK15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT – 30 –BD BOARD SIDE B 16. ADJUSTING POINTS AND CONNECTING POINTS– 31 – BD BOARD SIDE ASECTION DIAGRAMS – 32 –6-1.IC PIN FUNCTION DESCRIPTION •BD BOARD IC121 CXD2654R – 33 –– 34 – – 35 – •MAIN BOARD IC100 CXD8607N A/D CONVERTER – 36 –– 37 – – 38 – MDS-JB920 – 39 –– 40 – MDS-JB920 BLOCK DIAGRAM – SERVO Section –– 41 – – 42 –MDS-JB920 6-3.BLOCK DIAGRAM – MAIN Section –– 43 – – 44 –Note on Schematic Diagram – 45 –– 46 – • Circuit Boards Location•See page 45 for Circuit Boards Location 6-5.PRINTED WIRING BOARDS – BD Section –– 47 – – 48 –Page – 49 –– 50 – MDS-JB920MDS-JB920 6-7.SCHEMATIC DIAGRAM – BD Section 2/2 – See•– 51 – – 52 –• Waveforms – 53 –– 54 – MDS-JB920Page Page Page Page Page Page – 55 –– 56 – MDS-JB920– 57 – – 58 –MDS-JB920 Page Page Page Page – 59 –– 60 – MDS-JB920– 61 – – 62 –MDS-JB920 – 63 – MDS-JB920• Semiconductor Location US, CND – 66 –MDS-JB920 US, CNDPage Page Page Page – 67 –– 68 – MDS-JB920– 70 – 6-15.SCHEMATIC DIAGRAM - BD SWITCH SectionPRINTED WIRING BOARD – BD SWITCH Section – – 69 –IC152 BH6511FS-E2 – 71 –IC121 CXD2654RCXD8607N – 72 –– MAIN Board – IC100– 73 – IC200CXD8767N LA5632 IC300SN74HC153ANS IC7002 16 17 18 SECTION EXPLODED VIEWS– 75 – 1 CHASSIS SECTION 56– 76 – 2 FRONT PANEL SECTION 6359 58 206 201 – 77 –3MECHANISM SECTION MDM-5A 223 207 203 225– 78 – 4BASE UNIT SECTION MBU-5A 252254 SECTION ELECTRICAL PARTS LIST AC BAT BD– 79 – – 80 – – 81 – DISP– 82 – MAINMAIN MAIN – 84 –MAIN – 85 –MAIN – 87 – SW VOLHome A&V Products Company MDS-JB920Sony Corporation 9-922-869-11