Sansui-CDE770-cd-sm 电路图 维修手册.pdf

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1、O SANSUI SERVICE MANUAL CD-E770 COMPACT DISC PLAYER OPnCAL DIGITAL-OUTPUT O 8 OPnCAL DIGITAL-OUTPUT 0 e OPnCAL DIGITAL-OUTPUT I I - I I I I I =n- 3 c CAUTION 1. Parts identified by the A symbol on the schematic diagram and the parts list are critical tor safety. Use only replacement parts that have

2、critical characteristics recommended by the manufacturer. 2. Make leakage-current or resistance measurements to determine that exposed parts are acceptably insulated trom the supply circuit before returning the appliance to the customer. Cautions Concerning Handling of the Laser The foilowing label

3、has been affixed to the unit, listing the proper procedure for working with the laser beam. CLASS 1 LASER PRODUCT SPECIFICATIONS Type Compact disc digital audio system Optical pick-up 3-beam laser Wow and Flutter Below measurable limits Dimensions 360 mm (14-3/16) W 94 mm (3-3/4) H 301 mm (11-7/8) D

4、 Weight 3.0 kg (6.6 Ibs) net RadioFans.CN 收音机爱 好者资料库 CD-E770 1. BLOCK DIAGRAM S c m Z H -D O O) W 00 i s ? I * 3 * U 4 10 O 3 O O H -n3) H z i i )0 5 O 3c n AA AA * p I 3 3 0 3 ? 00 O 3 0 OJ 2 H 01- CLV Servo Control output CLV Servo Speed Control O , O w s If 11 s 3 7 0 m : m l - 2. x 0) U5 -1 OD -

5、 3)1 A- OJ ro O) UI ( O UI ? -n 3 O C D g r- Digital Signal Receiver O =3 O r Signal Processing I Digital Filter Power AMP D/A Converter I I 1 RadioFans.CN 收音机爱 好者资料库 CD-E770 2. INTERIOR BLOCK DIAGRAM L-H-L-pulse? YES YES H Pulse inuuuu 1.2Vp-p 10m/s NO Go to on page 9. Check mounting of tray. Check

6、 loading mechanism. Check clamping mechanism. Faulty pick-up feed. Check the feed mechanism and slide (feed) motor circuit. wlC3 (CXA1082AS) pin 20 (SLD) output: operating: 1 v stopped: 0.6V wlC1 (STA341) pin 6 (JP5, pin 5) output: operating: 0.4V stopped: OV Check operation of slide motor. . Faulty

7、 microprocessor Does the level of pin 30 (LDON) of microprocessor wlC6 (CXP-5034H) change to L? Does the level of pin 5 (LD) of fICI (CXA1081) change to L? fQ1:ST0Pi ON E 5V, C 1.4V, B 4.4V) E 3.6V, C 2.4V, B 3V) IFlow the current for operating the laser diodT Is the focus search voltage output? Is

8、there any output at pin 11 (FOC) of wlC3(CXA1802AS)? Change from +2V to about -2.5V. Is the focus drive voltage outout? Is there any output at pin 8 (TP3, TO) of wICI (STA341)f (6) YES Faulty laser pickup or faulty connector JP2. Does the focus search turn ON? Does the level of pin 28 (FOK) of fICI

9、(CXA1081S) change to H? NO Is there a laser output at the laser pickup? (check using the laser power meter) Is there continuity with the laser pickup focus coil? JNO Faulty laser pickup. Check the laser pickup output. Is there any output at TP1 RR When focus does not turn ON. / P / -L 5ms/DIV Eye-pa

10、ttern output with focus ON. Faulty wlC3 (CXA1082AS) Faulty focus adjustment. Move the focus offset adjuster to lts mid point, then slowly adjust it. _ Focus gain adjustment. 8 CD-E770 Fram on page 8. Is there any drive output at the spindle motor (disc)? Between pin 1 of terminal JP3 (fQ1 emitter) a

11、nd ground: Starting: 2.8V During play: 0.8V Stopped: OV YES Check or exchange spindle motor. From on page 8. NO YES Is there any output at pin 45 (SP) of wICS (CXAI082AS)? :ing: 3.5V Starting Stopped: -0.5V During play: About 1V Faulty wQ1 or wQ2. NO Is the level of Input at pin 41 (MON) of wlC3 (CX

12、AI 082AS) H? YES Faulty wlC3(CX1082AS). NO Faulty wlC4 (CXD1125Q2). SOOit Monitor the waveform at the GFS terminal with the oscilloscope set to 5ms/DIV. Carry out adjustments so that there are one or two nan-ow L level pulses on the screen. The servo system will function. Does the motor rotate at th

13、e correct speed? Does the level at pin 23 (GFS) of wlC6 (CXP5034H) change to H? (H during frame sync.) YES Faulty microprocessor or display circuit. NO Check RF and EFM signals. f AdjustPLL circuit (VOO). Faulty wlC4 (CXD1125Z) orwlC3 (CXA1082AS). Check tracking servo circuit. Is there any output at

14、 Tl of TP2? Tracking OFF: 2Vp-p During Play: -1 Vp-p Is there any output at FO of TP3? Tracking OFF: no output During Play: 3.5Vp-p Adjust tracking (offset) Readjust focus (offset) : is i 3-2. Checking the Tracking Servo Circuit The spindle motor (disc) rotates even when the tracking servo is OFF. 1

15、) Ground T2 of TP2. 2) Check the waveform at T1 of TP2 (tracking OFF). No input to pin 3 of wlC3 (CXA1082AS). 3-3. Checking the Focus Servo Circuit 1) Check the waveform at F1 of TP2. 2Vp-p 0.5ms/DIV 1 (1 0.2Vp-p 0.5ms/DlV 3) Check the waveform at Tl of TP2 (tracking ON, during Play). 2) Check the w

16、aveform at TO of TP3. 3) Ground F1 ofTP2. (1( 1 . A G.5Vp-p IVp-p 4) Check the waveform at FO of TP3 (no waveform is output when tracking is OFF). (Ground T2 of TP2.) 0.15V Repeated fiuctuation in DC voltage. -0.18V 1 CD-E770 * Checking the DAC Unit of the Amplifier (A-E770/E970) 3-4. No Sound Even

17、When CD Players PLAY Key is Pressed Is the 44.1kHz sampling indicator displayed? YES T Are the CD players sec display, etc, functioning? Is digital data being output from the digital OUT terminal? Is there any input at pin 28 of the DIN terminal vlC6 YM3623B of the F-6719toard in the amplifier? (See

18、 waveform diagram 1.) YES Faulty vlC6 YM3623B in amplifier. NO Is the fiber-optic cable connected? G o t o NO on page 11. YES NO Connect the fiber-optic cable. YES Is the fiber-optic lighting? ; ! NO NO Is digital data output from the emitter wQ8 on the F-6110 board of the CD player? (See waveform d

19、iagram 8,9.) NO YES Faulty wQ8 on the F-6110 board of the CD player or wlC4 CXD1125QZ. Faulty wlC5 on the F-6110 board of the CD player. Faulty amplifier F-6178 vICI HFBR2550 vlC2, vlC4. _vlC5 Check power supply. Is the waveform output from the TP5EFM terminal of the CD player correct? Are there too

20、 few L level pulses at pin 23 (GFS terminal) of wlC6? Is the correct waveform output from the RF terminal of TP1? Is there much fluctuation, etc, over 1 Vp-p? YES NO * Adjust focus tracking and VCO. No change even after adjustment. Faulty pickup. Is digital data being input from the CD player correc

21、tly? Does the waveform output from the emitter wQB on the F-6110 board of the DC player change when switching between STOP and PLAY (see CD waveform diagrams 8 and 9). Is there digital output from pin 17 (DO terminal) of vlC6 on the F-6179 of the amplifier? PLAY recorded section exists, (see wavefor

22、m diagram 1) STOP, no recorded section. NO Faulty RAM (IC5 CXKSBiePN, etc) in CD player. Faulty CXD1125QZ. YES -jzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA , s i l -V F-6179 board of CD player )ofvlC11 -Check data I/O (LC7881). Faulty vICI (STM5807EP, etc.) and vlC12 3 (NJM2082D, etc) or v

23、lC14 (NJM2082D). 10 CD-E770 From on pagezyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA 10. Point on circuit diagram Check the CD player servo system. Output Waveform at Points on DACof A-E770/E970 Point of circuit diagram (Pin 28 of vlC6 on F-6179 board: DIN terminal) Point of circuit diagram

24、(Pin 17 of vlC6 on F-6179 board: DO terminal) f MlllilHi: lOu/DIV 2/DIV Point : pin 28 (DIN terminal) Point: pin 17 (DO terminal) TRIG Pin19 1V/DIV 0.5MS/DIV Waveform Diagram (5) Point on circuit diagram Waveform Diagram (1) ! Point on circuit diagram (pin 6 of vlC6 on F-6179 board: XI terminal) 5V

25、lOus/DIV 2V/DIV 4.321MHz Waveform Diagram (6) Point on circuit diagram 2.6Vp-p Waveform Diagram (2) Point on circuit diagram (pin 8 of vICI 2 on F-6179 board: DATA) 16.9344MHz 2.6Vp-p 0.05MS/DIV 16.9344MHz Waveform Diagram (7) Point on circuit diagram 5Vp-p Waveform Diagram (3) Clock I/O of Main ICs

26、 1)vlC6 (YM3623B) (Digital signal interface) Pin 15 (17R terminal) 44.1kHz (during PLAY) 4.5 Vp-p - -2MH: Pin 12 (BCO terminal) 2.822MHz 5 Vp-p Pin 8 (0A terminal) 16.9MHz 5 Vp-p 2)vlC12LC7881) (D/A converter) Pin 6 (LRCK terminal) 176.4kHz 5 Vp-p , Pin 7 (WCLK1 terminal) 176.4kHz 5 Vp-p i Pin 9 (BC

27、LK terminal) 8.4677MHz 5 Vp-p 3-5. Output Waveforms at Each Point of CD-E770 Point on circuit diagram. Waveform Diagram (8) STOP 1V/DIV ls/DIV Waveform Diagram (9) PLAY 1V/DIV lus/Dl V Point on circuit diagram IMS/DIV 0.5V/DIV 5Vp-p 4.2336MHz Waveform Diagram (4) Waveform Diagram (10) 1 1 CD-E770 u

28、c 4. PARTS LIST OF BOARD 4-1. F-6110 Main Board Parts No. Stock No. Description Transistor fQI fQ2 fQ3 IC flCI Diode fDI , f C U fLI fVRI fVR2 Diode A mD6 vlC5 Transistor vQ8 vC18 Transistor IC or 48000801 46367101 48058801 46367101 48058801 48839900 46464100 48748400 48289400 46634500 46634300 0311

29、7700 49352600 46188601 48748400 2SA 934 2SC2603 2SC1740S 2SC2603 2SC1740S CXA1081S 1SS133 0.1 jiF 50VC.C. lOH Inductor 22ka S.V.R., Tracking Offset lOkn S.V.R., Focus Offset 10E-2 OPTICAL Received Module 2SA1015 0.1 (iF 50VC.C. wOl 48000901 2SC2060 wQ2 48000801 2SA 934 wQ3 48171600 DTC114YS wQ4 4636

30、7101 2SC2603 or 48058801 2SC1740S wQS 48217800 DTC1UES w06 46367001 2SA1115 or 46367201 2SA1048 or 48058601 2SA 933S wQ7 46367101 2SC2603 or 48058801 2SC1740S wQ8 48171600 DTC114YS wQ9 48183400 DTA114YS Parts No. Stock No. Description Diode wDI A wD2 wD5 wD6 wD7 Zener Diode 46464100 03117700 4646410

31、0 46464100 46464100 1SS133 10E-2 1SS133 1SS133 1SS133 wDZI 48552300 MTZ5.6A : or 48552400 MTZ5.6B or 48631100 RD5.6B1 or 48631200 RD5.6B2 : wDZ2 48551400 MTZ4.3A or 48629900 RD4.3B1 wR47 48774000 22kix8 A.R. f t i wR56 48770300 22knx6A.R. wR59 48777700 22knx10A.R. wC4 48748400 0.1nF50VC.C. wC7 48748

32、400 0.1 HF 50VC.C. wC25 48748400 0.1HF50VC.C. wC28 48717900 4.7HF 5.5V E.C. wC30 48748400 0.1 nF 50VC.C. wC53 48748400 0.1 F 50VC.C. wC54 48748400 0.1F50VC.C. wL2 48289400 lOjiH Inductor wL3 48288600 2.2nH Inductor wVRI 46634500 22ka S.V.R., Tracking Gain wVR2 46634500 22kQ S.V.R., Focus Gain wVR3 4

33、6633900 2.2k2 S.V.R., VCO 4-2. F-6111 Control Circuit Board Parts No. Stock No. Description Transistor nOl n02 nQ3 49325700 49325700 49325700 DTC114YL DTC114YL DTC114YL wICI 48667300 STA341M IC wlC2 48982600 LB1641 nICI 49350900 CXP5014H-318Q wlC3 49324400 CXA1082BS I wlC4 48976700 CXD11250-Z ; nLDI

34、 49351500 FL. Display Tube CP5370AGR wlC5 48718000 TC5517AP-2 or 48718100 HPD446C-2 nC3 48748400 0.1 nF 50VC.C. or 48718200 MB8416-20 0.1 nF 50VC.C. or 48839700 CXK5816PN-12L 0SI 49326300 Push SW., CARS or 49322700 UM6116-2 oS2 49326300 Push SW., OPEN/CLOSE wlC6 49298000 CXP5034H-069S oS3 49326300 P

35、ush SW., /QD , wlC7 49399500 M50747-699SP oS4 49326300 Push SW., oS5 49326300 Push SW., K M wXOI 48592500 Ouartz Element HC9/U 0S6 49326300 Push SW., OW or 49198700 Quartz Crystal oS7 49326300 Push SW., or 49259100 Quartz Element 0S8 49326300 Push SW., oS9 49326300 Push SW., REPEAT 0SIO 49326300 Pus

36、h SW., RND 0SII 49326300 Push SW., AUTO SPACING 12 CD-E770 Parts List Parts No. Stock No. Description oS12 49326300 Push SW-, 1 oS13 49326300 Push SW., 2 oS14 49326300 Push SW., 3 oS15 49326300 Push SW., TIME oS16 49326300 Push SW., MEMO C -f. oS17 49326300 Push SW., 4 oS18 , 49326300 Push SW., 5 oS

37、19 49326300 Push SW., 6 oS20 49326300 Push SW., 0 oS21 49326300 Push SW., CHECK oS22 49326300 Push SW., 7 oS23 49326300 Push SW., 8 oS24 49326300 Push SW., 9 oS25 49326300 Push SW., INTRO oS26 49326300 Push SW., CLEAR 5. PARTS LOCATION ON BOARD 5-1. F-6111 Control Sw itch Board Com ponent Side 4-3.

38、F-6112 P ow er Supply Board Parts No. Stock No. Description IC AmICI A A AmlC2 A A 07183500 or 48565400 or 49318800 48561000 or 49311500 or 49319500 Diode A mDI 03117700 A mD2 03117700 A mD3 03117700 A mD4 03117700 mD5 46464100 mC5 48748400 mC6 48748400 A mRI, 2 46401500 mFLI - 48484600 mFL2 4848460

39、0 mFL3 48484600 mFL4 48419300 mFL5 48419300 mFL6 48419300 mFL7 48419300 oS27 49352500 oJI 49417300 wLI 48289400 HPC78M05H AN78M05 HPC78M05HF AN79M05 HPC79M05H HPC79M05HF 10E-2 10E-2 10E-2 ; 10E-2 1SS133 0.1nF50VC.C. 0.1nF50VC.C. 3.9Q 1/2W N.I.R. Filter Filter Filter Ferrite CORE (BP53BH) Ferrite COR

40、E (BP53BH) Ferrite CORE (BP53BH) Ferrite CORE (BP53BH) Push SW., POWER FG Socket CFG1111-0101 lOjiH Inductor 1. Since some capacitors and resistors are omitted from parts lists in this Parts List, refer to the Common Parts List for capacitors and resistors, which was issued on June 1987. 2. Abbrevia

41、tions in this Parts List are as follows. SS S S | -Abt revlatlons List CR. : Carbon Resistor E.B.L Low Leak Bi-Poiar S.R. : Solid Resistor Eiectrolytic Capacitor Ce.R. : Cement Resistor Ta.C Tantaium Capacitor M.R. : Metal Film Resistor F.C. Fiim Capacitor F.R. : Fusing Resistor M.P. Metaiized Paper

42、 N.I.R. : Non-Inflammable Capacitor Resistor P.C Poiystyrene Capacitor A.R. : Array Resistor M.M.C. Metaiized Mylar CC. : Ceramic Capacitor Capacitor CT. : Ceramic Capacitor, A.C. Array Capacitor Temperature V.R. Variable Resistor Compensation S.V.R. Semi Variable Resistor E.C : Elecrolytic Capacito

43、r SW. Switch E.L. : Low Leak Electrolytic Chip R. Chip Resistor Capacitor Chip C. Chip Capacitor E.B. : Bi-Polar Electrolytic Capacitor 13 CD-E770 5-2. F-6110 Main Board Component Side rrd-1zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA izyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA-i.

44、14 CD-E770 5-3. F-6112 Power Supply Board Component Side D 5-4. F-6109 Motor Board Parts No. Stock No. Description 1 27787300 Tray Panel (Black Model) 27765400 Tray Panel (DMC Model) 2 27655810 Tray 3 27659000 Spring 4 27655900 Disk Plate 5 27657000 CL Plate 6 27656600 Clannper 7 27656910 Clamp Arnn

45、 8 27658900 Spring 9 68064700 Pickup Assy 10 27656300 Middle Gaar 11 27422700 Belt 12 27656400 L Pulley 13 27656000 Cum Gaar 14 27727600 Rubber Cushion 15 27656500 L Gear 16 27658800 Support Rail 17 27364110 Turn Tabla Parts No. Stock No. Description 18 27656810 LA Plate Spring 19 13303900 Screw, TB

46、2X5 20 27656700 Lift Arm 21 27659100 Spring 22 48829000 Push SW., TRAY OUT 23 46609800 Screw 2 M2X3B, Motor 24 00420600 Screw MB2X6, Motor 25 27364400 Floating Rubber 26 27656200 Feed Gear 27 27656100 Holder Plate 28 48793900 Push SW FEED IN 29 48584900 Spindle Motor 30 48829000 Push SW., TRAY IN 31

47、 27572400 Pulley 32 49263100 Loading Motor 33 49263100 Feed Motor 34 27727500 Spacer 15 16 CD-E770 7. PARTS LIST OF SET Parts List Parts No. Stock No. Description Parts No. Stock No. Description 1 27726500 Front Panel Assy (Black Model) 3 27723000 Bonnet (Black Model) 27726400 Front Panel Assy (DMC

48、Model) 27722900 Bonnet (DMC Model) 1-1 27736200 Knob Assy, 1.2.3.MEM 4 84606000 Foot Assy; front 1-2 27736300 Knob Assy, 4.5.6.CLEAR 5 84606100 Foot Assy, rear 1-3 27736400 Knob Assy, 7.8.9.0 6 49326300 Tact SW., control 1 27713200 Knob Assy A (Black Model) 7 27710500 Knob, POWER SW. (Black Model) 27713300 Knob Assy A (DMC Model) 27710400 Knob, POWER SW. (DMC Model)