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Sony MDS-JB920 service manual Section Diagrams, 32, Ic Pin Function Description

Models: MDS-JB920

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SECTION 6

DIAGRAMS

6-1. IC PIN FUNCTION DESCRIPTION

•BD BOARD IC101 CXA2523AR (RF AMP, FOCUS/TRACKING ERROR AMP)

Pin No.	Pin Name			I/O		Function

1		I		I	I-V converted RF signal I input from the optical pick-up block detector

2		J		I	I-V converted RF signal J input from the optical pick-up block detector

3		VC		O	Middle point voltage (+1.65V) generation output terminal

4 to 9		A to F		I	Signal input from the optical pick-up detector

10		PD		I	Light amount monitor input from the optical pick-up block laser diode

11		APC		O	Laser amplifier output terminal to the automatic power control circuit

12	APCREF			I	Reference voltage input terminal for setting laser power

13		GND		—	Ground terminal

14		TEMPI		I	Connected to the temperature sensor

15	TEMPR			O	Output terminal for a temperature sensor reference voltage

16		SWDT		I	Writing serial data input from the CXD2654R (IC121)

17		SCLK		I	Serial data transfer clock signal input from the CXD2654R (IC121)

18		XLAT		I	Serial data latch pulse signal input from the CXD2654R (IC121)

19	XSTBY			I	Standby signal input terminal “L”: standby (fixed at “H” in this set)

20		F0CNT		I	Center frequency control voltage input terminal of internal circuit (BPF22, BPF3T, EQ) input
					from the CXD2654R (IC121)


21		VREF		O	Reference voltage output terminal Not used (open)

22		EQADJ		I	Center frequency setting terminal for the internal circuit (EQ)

23		3TADJ		I	Center frequency setting terminal for the internal circuit (BPF3T)

24		VCC		—	Power supply terminal (+3.3V)

25	WBLADJ			I	Center frequency setting terminal for the internal circuit (BPF22)

26		TE		O	Tracking error signal output to the CXD2654R (IC121)

27		CSLED		I	Connected to the external capacitor for low-pass filter of the sled error signal

28		SE		O	Sled error signal output to the CXD2654R (IC121)

29		ADFM		O	FM signal output of the ADIP

30		ADIN		I	Receives a ADIP FM signal in AC coupling

31	ADAGC			I	Connected to the external capacitor for ADIP AGC

32		ADFG		O	ADIP duplex signal (22.05 kHz ± 1 kHz) output to the CXD2654R (IC121)

33		AUX		O	Auxiliary signal (I3 signal/temperature signal) output to the CXD2654R (IC121)

34		FE		O	Focus error signal output to the CXD2654R (IC121)

35		ABCD		O	Light amount signal (ABCD) output to the CXD2654R (IC121)

36		BOTM		O	Light amount signal (RF/ABCD) bottom hold output to the CXD2654R (IC121)

37		PEAK		O	Light amount signal (RF/ABCD) peak hold output to the CXD2654R (IC121)

38		RF		O	Playback EFM RF signal output to the CXD2654R (IC121)

39	RFAGC			I	Connected to the external capacitor for RF auto gain control circuit

40		AGCI		I	Receives a RF signal in AC coupling

41	COMPO			O	User comparator output terminal	Not used (open)

42	COMPP			I	User comparator input terminal	Not used (fixed at “L”)

43		ADDC		I	Connected to the external capacitor for cutting the low band of the ADIP amplifier

44		OPO		O	User operational amplifier output terminal Not used (open)

45		OPN		I	User operational amplifier inversion input terminal Not used (fixed at “L”)

46		RFO		O	RF signal output terminal

47		MORFI		I	Receives a MO RF signal in AC coupling

48	MORFO			O	MO RF signal output terminal

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Sony MDS-JB920 service manual Section Diagrams, 32, Ic Pin Function Description

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 Display Precedure – 7 –Record Precedure Checks Prior to Parts Replacement and Adjustments Forced Reset– 8 – Procedure– 9 – Retry Cause Display ModePrecedure Fig. 1 Reading the Test Mode DisplayHexadecimal nBinary Conversion Table – 10 –Reading the Display SECTION GENERAL – 11 –LOCATION OF CONTROLS • Front view • Rear view– 12 – – 13 – – 14 – CASEDISASSEMBLY SECTIONMAIN BOARD – 15 –FRONT PANEL SECITON SLIDER CAM – 16 –MECHANISM SECTION MDM-5A SW BOARD, LOADING MOTOR M103 – 17 –BASE UNIT MBU-5A,BD BOARD 1. PRECAUTIONS FOR USE OF TEST MODE 2. SETTING THE TEST MODESECTION TEST MODE – 18 –– 19 – 5. SELECTING THE TEST MODE5-3. Non-VolatileMemory Mode EEP MODE – 20 –5-1.Operating the Continuous Playback Mode – 21 – 6. FUNCTIONS OF OTHER BUTTONS7. TEST MODE DISPLAYS 4.Auto gain display Not used in servicing– 22 – MEANINGS OF OTHER DISPLAYS– 23 – SECTION ELECTRICAL ADJUSTMENTS1.PARTS REPLACEMENT AND ADJUSTMENT 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 B6-1.IC PIN FUNCTION DESCRIPTION SECTION DIAGRAMS– 32 – – 33 – •BD BOARD IC121 CXD2654R– 34 – – 35 – – 36 – •MAIN BOARD IC100 CXD8607N A/D CONVERTER– 37 – – 38 – – 40 – MDS-JB920– 39 – 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 PageMDS-JB920 – 57 –– 58 – – 59 – – 60 –MDS-JB920 Page Page Page PageMDS-JB920 – 61 –– 62 – • Semiconductor Location – 63 –MDS-JB920 – 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 CXD8607NCXD8767N – 73 –IC200 IC300 SN74HC153ANSIC700 LA5632SECTION EXPLODED VIEWS – 75 –1 CHASSIS SECTION 56 2 16 17 1859 58 – 76 –2 FRONT PANEL SECTION 63 – 77 – 3MECHANISM SECTION MDM-5A223 207 203 225 206 201254 – 78 –4BASE UNIT SECTION MBU-5A 252 – 79 – SECTION ELECTRICAL PARTS LISTAC BAT BD – 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