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Sony MDS-JB920 service manual 73, IC200, CXD8767N

Models: MDS-JB920

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Page 57

IC200

IC200	CXD8767N
	INVO	1								56	INVI
	BCKI	2			OVERFLOW DETECTER		OR			55	TEST
					OVERFLOW DETECTER		OR
	DATA1	3	S/P		FIR1	FIR2	FIR3	D/F TIMNG CIRCUIT		54	128FsO
				IIR	FIR1	FIR2	FIR3
				IIR
	LRCKI	4		ATT						53	DINIT
	LRCKI	4								53	DINIT
						FIR4
	INIT	5								52	OVFLAG
	ATT	6			OVERFLOW DETECTER			“0” DETECT	MUTE CIRCUIT	51	MUTEL
					OVERFLOW DETECTER
	SHIFT	7	MODE	ATT	FIR1	FIR2	FIR3			50	MUTER
			MODE	ATT	FIR1	FIR2	FIR3
	LATCH	8		IIR						49	NU
	LATCH	8								49	NU
						FIR4
	SYSM	9								48	64FSI
	NU	10		3rd order			ATT			47	MCKIN
				3rd order	L.I.P	X0.75
				NOISE		X0.75
	NU	11		NOISE						46	DVSS1
	NU	11		SHAPER						46	DVSS1
				REGISTER	DITHER
	DVSS1	12								45	DVDD1
							ATT
	DVDD1	13		3rd order			ATT			44	DVDD2
	DVDD1	13		3rd order		X0.75				44	DVDD2
				NOISE	L.I.P	X0.75
				NOISE	L.I.P
	NU	14		SHAPER						43	256FSO
	NU	14								43	256FSO
	CKCTL	15						CLOCK BUFFER		42	CKVdd
	MUTE	16						CLOCK BUFFER		41	LVCKO
	MUTE	16						CLOCK GENERATOR		41	LVCKO
	SYNC	17								40	64FSO
	VSUB	18								39	DVSS2
	VSUB	18								39	DVSS2
	AVDDL1	19								38	AVDDR1
	L1(–)	20		Buffer(–)	PLM-L1		PLM-R1	Buffer(–)		37	R1(–)
	L1(+)	21		Buffer(+)				Buffer(+)		36	R1(+)
	AVSSL1	22								35	AVSSR2
	AVSSL2	23								34	AVSSR2
	L2(+)	24		Buffer(+)	PML-L2		PLM-R2	Buffer(+)		33	R2(+)
	L2(–)	25		Buffer(–)				Buffer(–)		32	R2(–)
	AVDDL2	26								31	AVDDR2
	XVDD	27		1024Fs-CLOCK						30	XVSS
				1024Fs-CLOCK
	XVDD	28		BUFFER						29	XIN
	XVDD	28								29	XIN

– 73 –

Image 57

Sony MDS-JB920 service manual 73, IC200, CXD8767N

Contents

SERVICE MANUAL SPECIFICATIONSMDS-JB920 MINI DISC DECK– 2 – SELF-DIAGNOSISFUNCTION– 3 – Items of Error History Mode Items and ContentsTable of Error Codes Selecting the Test Mode6.DIAGRAMS TABLE OF CONTENTSSECTION SERVICING NOTES DISASSEMBLYFlexible Circuit Board Repairing – 5 –Notes on chip component replacement ADVARSELJIG FOR CHECKING BD BOARD WAVEFORM – 7 – Record PrecedureDisplay Precedure Forced Reset Checks Prior to Parts Replacement and Adjustments– 8 – ProcedureRetry Cause Display Mode – 9 –Precedure Fig. 1 Reading the Test Mode Display– 10 – Reading the DisplayHexadecimal nBinary Conversion Table – 11 – SECTION GENERALLOCATION OF CONTROLS • Front view • Rear view– 12 – – 13 – CASE – 14 –DISASSEMBLY SECTION– 15 – FRONT PANEL SECITONMAIN BOARD – 16 – MECHANISM SECTION MDM-5ASLIDER CAM – 17 – BASE UNIT MBU-5A,BD BOARDSW BOARD, LOADING MOTOR M103 2. SETTING THE TEST MODE 1. PRECAUTIONS FOR USE OF TEST MODESECTION TEST MODE – 18 –5. SELECTING THE TEST MODE – 19 –– 20 – 5-1.Operating the Continuous Playback Mode5-3. Non-VolatileMemory Mode EEP MODE 6. FUNCTIONS OF OTHER BUTTONS – 21 –7. TEST MODE DISPLAYS 4.Auto gain display Not used in servicingMEANINGS OF OTHER DISPLAYS – 22 –SECTION ELECTRICAL ADJUSTMENTS 1.PARTS REPLACEMENT AND ADJUSTMENT– 23 – 4. PRECAUTIONS FOR ADJUSTMENTS 2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSINONLaser power meter – 24 –6. CHECK PRIOR TO REPAIRS – 25 –6-1.Temperature Compensation Offset Check Checking Procedure6-5.C PLAY Checking MO Error Rate Check – 26 –CD Error Rate Check 6-4.Focus Bias Check9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT 7. INITIAL SETTING OF ADJUSTMENT VALUE10. LASER POWER ADJUSTMENT – 27 –Specification 11. TRAVERSE ADJUSTMENTAdjusting Procedure Connection– 29 – 12.FOCUS BIAS ADJUSTMENT15.AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 13.ERROR RATE CHECK– 30 – 14. FOCUS BIAS CHECK– 31 – 16. ADJUSTING POINTS AND CONNECTING POINTSBD BOARD SIDE A BD BOARD SIDE BSECTION 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 – – 41 – BLOCK DIAGRAM – SERVO Section –– 42 – MDS-JB920– 43 – 6-3.BLOCK DIAGRAM – MAIN Section –– 44 – MDS-JB920– 46 – – 45 –• Circuit Boards Location Note on Schematic Diagram– 47 – 6-5.PRINTED WIRING BOARDS – BD Section –– 48 – •See page 45 for Circuit Boards Location– 50 – – 49 –MDS-JB920 Page– 51 – 6-7.SCHEMATIC DIAGRAM – BD Section 2/2 – See•– 52 – MDS-JB920– 54 – – 53 –MDS-JB920 • Waveforms– 56 – – 55 –MDS-JB920 Page Page Page Page Page Page– 57 – – 58 –MDS-JB920 – 60 – – 59 –MDS-JB920 Page Page Page Page– 61 – – 62 –MDS-JB920 – 63 – MDS-JB920• Semiconductor Location MDS-JB920 – 66 –US, CND US, CND– 68 – – 67 –MDS-JB920 Page Page Page PagePRINTED WIRING BOARD – BD SWITCH Section – 6-15.SCHEMATIC DIAGRAM - BD SWITCH Section– 69 – – 70 –IC121 – 71 –CXD2654R IC152 BH6511FS-E2– MAIN Board – – 72 –IC100 CXD8607N– 73 – IC200CXD8767N SN74HC153ANS IC300IC700 LA5632– 75 – SECTION EXPLODED VIEWS1 CHASSIS SECTION 56 2 16 17 18– 76 – 2 FRONT PANEL SECTION 6359 58 3MECHANISM SECTION MDM-5A – 77 –223 207 203 225 206 201– 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 VOLSony Corporation MDS-JB9209-922-869-11 Home A&V Products Company