NAD-C521-cd-sm维修电路原理图.pdf

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1、NAD SERVICE MANUAL C 521 COMPACT DISC PLAYER C 521 COMPACT DISC PLAYER RadioFans.CN 收音机爱 好者资料库 CATUION HGKJDHSGKJHGSJK ADVARSEL HGKJDHSGKJHGS KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK ADVARSEL HGKLFH;L;HJMNMD HFKLJHJLDKLJLKDJLKFHJHSGMMKJHGSJK VARING HGKJDHSGKJHGKLGDJH KLHKFG;LKNG;LKJGF;LKJGF;LKJFL;SJK VARO! H

2、GKJDHSGKJHJBJKBKJBJKGS KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK VORSICT! HGKLFH;L;HHBHHJD JHFKLJHJLDKLJLKDJLKFHJHSGKJHGSJK 2 SAFETY INFORMATION CAUTION CAUTION- INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM. ADVARSEL- USYNLIG LASERSTRLING NR DEKSELPNES OG SIKKERHEDSLS BR

3、YTES. UNNG EKSPONERING FOR STRLEN. ADVARSEL- USYNLIG LASERSTRLING VED BNING, NR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDG UDSTTELSE FOR STRLING. VARING- OSYNLING LASERSTRLNING NR DENNADELR PPNAD OCH SPRRAR R URKOPPLADE. STRLEN R FARLIG. VARO!- AVATTAESSAJASUOJALUKITUS OHITETTAESSAOLET ALTTIINANKT

4、MTNT LASERSTEILYLLE. L KAISO STEESEEN. VORSICT!- UNSICHTBARE LASERSTRAHLUNG TRITTAUS, WENN DECKELGEFFNETUND WENN SICHERHEITSVERRIEGELUNG BERBRCKTIST. NICHTDEM STRAHLAUSSETZEN. THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:- (1) THIS DEVICE M

5、AY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION. The lightning flash with arrowhead, within an equilateral tri- angle is intended to alert the user of the presence of uninsulated dangerous voltage

6、 within the products enclosure; that may be of sufficient magnitude to consti- tute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intend- ed to alert the user of the presence of important operating and maintenance (servicing) instructions in the literat

7、ure accompanying the appliance. CLASS 1 LASER PRODUCT RadioFans.CN 收音机爱 好者资料库 3 SERVICE SAFETY PRECAUTIONS 1.Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. Reference NoPart NumberDescription M502-M504 *AH 5120-0020-0FU T1A 250V UL/

8、CSA 5X20MM M502-M504 *C 5120-0018-0FU T1A 250V SEMKO/UDE 5X20MM M505 *AH 5120-0052-0FUSE T1.6A 250V 5X20MM UL/CSA M505 *C 5120-0050-0FUSE T1.6A/250V 5X20MM SEMKO/VDE NOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY. 2.Safety check out (Only U.S.A. model) Before returning the product to the cu

9、stomer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit. Parts marked with the symbol are critical with regard to the risk of fire and electric shock. Replace only with parts recommended by the manufacturer. CONTENTS DE

10、SCRIPTIONPAGE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 DISASSEMBLY INSTRUCTIONS . .

11、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12、. . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 RF PATTERN TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、 . . . . .10-11 PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16 IC BLOCK DIAGRAM . . . .

14、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-20 TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . .

15、 . . . . . . . . . . . . . . . . . . . . . .22-26 MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 MECHANISM EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 EXPLODED VIEW OF LA

16、SER CD11A-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 EXPLODED VIEW PARTS LIST OF LASER CD11A-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17、. . . . . . . . . . . . . . . .31 EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 RadioFans.CN

18、收音机爱 好者资料库 4 SPECIFICATIONS Disc Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . One Disc, 120 or 80 mm Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BURR-BROWN Delta Sigma 20bit Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

19、Times oversample Analog Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 pole active Frequency Response . . . . . . . . . . . . . . . . . . . . . . +/- 0.5 dB, 5Hz - 20kHz De-Emphasis Error . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.3 dB THD (at 0 dB, 1kHz) . . . . . . .

20、 . . . . . . . . . . . . . . . . 0.007% Intermodulation Distortion . . . . . . . . . . . . . . . . . . . 90 dB 10 kHz . . . . . . . . . . . . . . . . . 80 dB Wow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . . Unmeasurable (Quartz Crystal Accuracy) Output Impedance . . . . . . . . .

21、. . . . . . . . . . . . . . . . 200 Output Level at 0 dB . . . . . . . . . . . . . . . . . . . . . . . 2.2 V rms Digital Error Correction . . . . . . . . . . . . . . . . . . . . . IRC with double error correction in C1 and C2 Digital Code Output . . . . . . . . . . . . . . . . . . . . . . . . Sony /

22、 Philips Serial data format CONTROLS Play / Pause, Stop, Random, Skip (), Scan (), Open, Time, Repeat. PHYSICAL SPECIFICATIONS Dimensions435 x 80 x 285 mm (Width x Height x Depth) Net weight4 kg (8.8 lbs) Shipping weight5.1 kg (11.22 lbs) RadioFans.CN 收音机爱 好者资料库 5 REAR PANEL / FRONT PANEL REAR PANEL

23、 FRONT PANEL 1. LINE OUT 2. DIGITAL OUT 3. AC LINE CORD 1. POWER ON / OFF 2. DISC DRAWER 3. DISPLAY 4. OPEN 5. PLAY / PAUSE 6. TIME 7. STOP 8. REPEAT 9. RANDOM 10. SCAN Back () / Forward () 11. SKIP Back () / Forward () RadioFans.CN 收音机爱 好者资料库 6 DISASSEMBLY INSTRUCTIONS 1. Remove machine screws M 4.

24、0 x 6.0 ( 1 to 4 ) from the side panels. Remove tapping screw 3.0 x 8.5 5 from the back panel. Refer to Figure No.1. Figure No.1 2. Pull both sides of the TOP COVER slightly outwards 6 and tilt approx. 35 and then remove in the direction as indicated by the arrow 7 . Refer to Figure No.2. Figure No.

25、2. 5 4 3 1 2 7 6 6 RadioFans.CN 收音机爱 好者资料库 7 BLOCK DIAGRAM U401 LC587206A SYSTEM CONTROL CPU & LCD DISPLAY DRIVER Q401- Q403 MUTE CIRCUIT Q301-Q304 MUTE M317 RCA JACK U302 PMC1710 M318 RCA JACK DIGITAL OUTPUT M501* LCD DISPLAY 3 5619 2 63 23293962 37 1 2 16 13 3 42 44 43 23 24 14 13 33 34 31 32 21 2

26、2 65 67 24 36 56 L R L R CD AUDIO O/P 1011 3031 56 35 34 39 40 4443 1 63 62 U301 LC78621 DIGITAL SIGNAL PROCESSOR 15 27 16 29 210 5 10 6 11 20 25 21 26 3 18 13 28 U101 LA9240 ANALOG SIGNAL PROCESSOR/SERVO TOFF TGL CLV- CLV+ EFM U701 LB1641 MOTOR DRIVER U201 LA6541 FOCUS & TRACKING MOTOR DRIVER LOADI

27、NG MOTOR LOADING MOTOR LIMIT SWITCH SPINDLE MOTOR SLED MOTOR PU-IN LIMIT SWITCH PICK UP DISC KEYBOARD M113 REMOTE SENSOR CD MECHANISM UNIT POWER TRANSFORMER AC POWER I / P M110M109 REPEAT M104M111M112 RANDOM M106M101M103M102 TIME M108 Q101 DAC U306U305 4 U501,U507 DIGITAL POWER U502-3,U506 ANALOGUE

28、POWER +8V+5V+12V5V -12V D514-D517 RECTIFIER DIODES D501-D504 RECTIFIER DIODES D506 RECTIFIER DIODES U504 POWER FOR EL LIGHT M502 EL LIGHT U403 74HC00 NAND GATE M303 EMC FILTER L301 DIGITAL COIL M500 1 RadioFans.CN 收音机爱 好者资料库 8 WIRING DIAGRAM M102 (15 PINS) M505B WHITE M505A WHITE M509A BLACK M120 BL

29、ACK M500A BLACK M805 BROWN NEUTRAL LIVE M803 BROWN J402 M105 (6 PINS) M101 (5 PINS) MAIN BOARD TRANSFORMER BOARD DISPLAY BOARD LIVE BOARD CD MECHANISM KEYBOARD 115V:J401,J404 230V:J403 L401 J403 J406 J407 J402 J404 J401 1723-006A-0000 8V 0V 0V 8V 15V 0V 15V ISSUE B RadioFans.CN 收音机爱 好者资料库 9 RF PATTE

30、RN TESTING Testing Point NAD - C 521 PCB TESTING POINTS DIAGRAM TESTING PROCEDURE (1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode. (2) Connect the scope to R132 (Pin 41 of U101) and DGND (J334). Scope setting:Coupling: AC. Vertical sensitivity: 0.2 V/ div. Horizontal tim

31、e base: 0.5 S/div. (3) Observe the waveform is 2.0V p-p +/-5% and the eye pattern is at its best shape (see FIG. 1). FIG. 1 (a)FIG. 1 (b) Poor eye pattern FIG. 1 (C) Good eye pattern 3T 4T5T 11T RadioFans.CN 收音机爱 好者资料库 10 IMPORTANT NOTES INSTRUCTION FOR HANDLING OPTICAL SYSTEM BLOCK PICK-UP Electros

32、tatic breakdown of the laser diode in the optical system block may occur due to a poten- tial difference caused by electrostatic charge accumulated on clothing, human body, etc. A ground must be provided as follows to prevent any electrostatic charge during unpacking or repair work. 1. Ground for Hu

33、man Body Be sure to wear a ground band (1M ohm) that is properly to remove any static electricity that may be charged on the body. 2. Ground for Work Bench Be sure to place a conductive sheet (1M ohm) or copper plate with proper grounding on the work bench or other surface on which the pick-up is to

34、 be placed. 3. Because the static electricity charge on the clothing does not discharge through the body grounding band, do not let clothing to get in contact with the pick-up unit. PRECAUTIONS FOR CHECKING BEAM EMISSION The laser beam of this unit is focused on the reflecting surface of the objecti

35、ve lens in the optical system block. Therefore, keep your eyes at least 12 inches (30 cm) away from the objective lens when the laser diode is ON. (Operation Check Method for Laser Diode and Focus Search Function.) When the POWER switch is turned ON after the chucking plate is removed, observe the o

36、bjective lens and confirm that the following operations are performed properly. (The optical system should be at the lead-in area position when it is checked at this time.) (1) The laser should be at the innermost position after the chucking plate is removed. (2) The diffused light of the laser beam

37、 can be seen when the POWER switch is turned ON. (3) Vertical (up and down) movement of the objective lens (2 or 3 times) will take place. INCORRECTCORRECT NOTE: Laser diodes are so susceptible to damage from static electricity that even if a static discharge does not ruin the diode, it can shorten

38、its life or cause it to work improperly. 1.Grounding band 1M ohm 1M ohm 2.Conductive Sheet or Copper Plate RadioFans.CN 收音机爱 好者资料库 11 PRECAUTIONS WHEN CHANGING LASER PICK-UP When removing the pick-up assembly, short circuit the PCB tracks on the optical block as show in the drawing in order to prote

39、ct the pick-up before removal. NOTE: Replacement pick-up assemblies are supplied with the PCB pattern already protected. DO NOT REMOVE THE SHORT CIRCUITS UNTIL YOU HAVE FINISHED FITTING THE PICK- UP. Caution: Laser diodes are extremely susceptible to damage from static electricity. Even if a static

40、dis- charge does not ruin the diode, it can shorten its life or cause it to work improperly. When replac- ing the pick-up, use a conductive mat, a grounded soldering iron, and so on, to protect the laser diode from static damage. Ground Conductive Wrist Band for Body Ground Line Less than 10 ohm Con

41、ductive Gum Mat Soldering Iron with Ground wire Protective soldering place for laser diode RadioFans.CN 收音机爱 好者资料库 12 PCB LAYOUT TRANSFORMER BOARD LIVE BOARD KEY BOARD DISPLAY BOARD 115V:J401,J404 230V:J403 L401 J403 J406 J407 J402 J404 J401 1723-006A-0000 8V 0V 0V 8V 15V 0V 15V ISSUE B RadioFans.CN

42、 收音机爱 好者资料库 14 13 MAIN BOARD RadioFans.CN 收音机爱 好者资料库 1516 SCHEMATIC DIAGRAM M502 M501 5V 0V 4.3V 2.2V 5V 0V 0V 0V 0V 0V 2.4V 1.6V 0V 0V 0V 4.9V 0V 0V 4.8V *0V 4.8V *1.2V 4.9V *0V 5V 5V 2.4V 0V 1.1V *2.7V 1.2V *2.7V *7.4V 7.8V 2.5V 2.5V 2.5V 3.4V 3.4V 0V 0V 0V 3.5V 3.5V 2.5V 2.5V 4.8V 4.9V *7.4V 7.8V

43、 *5V 0V 2.4V 2.5V *3.3V 3.5V *2.9V 3.5V 0V 0V 0V 3.4V 3.4V 2.5V 2.5V 5V *7.4V 7.8V 0V 0V 0V 5V 5V 5V 5V 4.9V 4.9V 4.9V 4.9V 0V 4.8V 2.6V 2.4V 4.9V #0V #4.9V 0V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2V 3.7V 0V 0V 0V 0V 0V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.

44、4V 5V 0V 3.3V 1.6V 0V 4.7V 4.8V 0V 0V 0V 0V *1.8V 5V 5V 0V 4.9V 4.9V 0V 5V 2.3V 2.2V 0V 0V 2.4V 2.3V 4.9V 4.9V 4.9V 0V 0V *1.4V 4.6V 0V 1.7V 5V 1.5V *0.3V 0V 2.3V 2.5V 2.5V 0V *0.4V 0V 0V 0V 0V 0V 0V 0V 4.9V 4.9V 0V0V 0V0V0V0V0V0V0V0V0V0V0V 0V 2.4V 2.4V 3V *1.6V 0V *1.8V 0V 2.4V2.4V5V 2.3V 0.2V *0V

45、4.9V 0V 0.7V 0.5V 0V 0V 7.8V 7.8V 0.7V 0.5V 0.06V #4.2V *1.2V 3V 2.4V 2.4V 2.1V 2.3V 2.3V 0V 0V 2.4V 2.5V 0V 5V 5V 0V 5V 0V 4.9V 0V 2.3V 0V 0V 2.4V 2.5V 5V 5V 5V NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/8W. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V 10%. 3. COMPONENT

46、S MARKED “” ARE SAFETY CRITICAL PARTS. 4. VOLTAGE SPECIFIED ON THE ICS PIN WHICH DOES NOT HAS MARKING IS IN STOP MODE, MARKED WITH “*” IS PLAY MODE, “#” IS TRAY OPEN MODE AND “ IS TRAY CLOSE MODE. RESISTORS: M- METAL FILM CARBON FILM UNLESS OTHERWISE SPECIFIED. RadioFans.CN 收音机爱 好者资料库 64 VCC1 63 LDS

47、 62 LDD 61 BH1 60 PH1 59 LF2 58 VR 57 REFI 56 VCC2 55 FSS 54 DRF 53 CE 52 DAT 51 CL 50 CLK 49 DEF 48 NC 47 TBC 46 FSC 45 DGND 44 SLI 43 SLC 42 RFS 41 RFSM 40 CV+ 39 CV 38 SLOF 37 HFL 36 TES 35 TOFF 34 TGL 33 JP+ 32 JP 31 SL+ 30 SL 29 SLD 28 SLEQ 27 SPD 26 SP 25 SPG 24 SPI 23 SP 22 AGND 21 FE 20 FE 1

48、9 FA 18 FA 17 FD 1FIN2 2FIN1 3E 4F 5TB 6TE 7TE 8TESI 9SCI 10TH 11TA 12TD 13TD 14JP 15TO 16FD REF BAL I/V TE T.SERVO & T.LOGIC F.SERVO & F.LOGICSPINDLE SERVO SLC APC RF DET VCA RF Amp - com INTER FACE VCA SLED SERVO EFMO DEFI EFMIN LRSY C2F ROMXA DOUT ASDACK ASDFIN ASDFIR ASLRCK DACKO DFOLO DFORO LRC

49、KO FSEQ CLV+ CLV V/P PW,SBCK SBSY,SFSY WRQ,SQOUT CQCK COIN RWC DEMO FST,FOCS FZD HFL,RES TES,JP+ TOFF,JP THLD,TGL EMPH LASER 16M 4.2M CS CONT EFLG FSX XIN XOUT XVDD,XVSS CK2 RVDD,RVSS MUTER RCHP RCHN LVDD,LVSS LCHN LCHP TGL EFMO VVDD VVSS PDO ISET PCK TAI TST11 TST10 TSET1 TEST2 TEST3 TEST4 TEST5 VDD VSS 2K x 8-bit RAM RAM address generator Interpolation and muting Antishock interface Digital attenuator 8x oversampling digital filters Level meter Peak meter Crystal oscillator system Timing generation C1 AND C2 ERROR DETECTION AND CORRECTION