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1、NAD SERVICE MANUAL C 541 COMPACT DISC PLAYER C 541 COMPACT DISC PLAYER RadioFans.CN 收音机爱 好者资料库 2 CATUION HGKJDHSGKJHGSJK ADVARSEL HGKJDHSGKJHGS KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK ADVARSEL HGKLFH;L;HJMNMD HFKLJHJLDKLJLKDJLKFHJHSGMMKJHGSJK VARING HGKJDHSGKJHGKLGDJH KLHKFG;LKNG;LKJGF;LKJGF;LKJFL;SJK VARO!
2、 HGKJDHSGKJHJBJKBKJBJKGS KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK VORSICT! HGKLFH;L;HHBHHJD JHFKLJHJLDKLJLKDJLKFHJHSGKJHGSJK 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 M507 *AH 5120-0052-0FUSE T1.6A 250V 5X20
8、MM M512, M513 *AH 5120-0020-0FU T1A 250V UL/CSA 5X20 M514 *AH 5120-0026-0FU T315MA L 250V UL/CSA M507 *C 5120-0050-0FUSE T1.6A 250V 5X20MM M512, M513 *C 5120-0018-0FU T1A 250V SEMKO/VDE M514 *C 5120-0027-0FU T315MAL 250V NOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY. 2.Safety check out (On
9、ly U.S.A. model) Before returning the product to the customer, 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
10、with parts recommended by the manufacturer. CONTENTS DESCRIPTIONPAGE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11、. . . . . . . . . . . . .5 DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 WIRING DIAGRAM . .
12、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 RF PATTERN TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . .
13、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11 PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、 . . . . . . . . . . . .15-16 IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-19 TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 ELECTRICAL PARTS LIS
15、T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-26 MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 MECHANISM EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . .
16、. . . . . . . . . . . . . . . . .28 EXPLODED VIEW OF LASER CD11CA-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29 EXPLODED VIEW PARTS LIST OF LASER CD11CA-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 EXPLODED VIEW . . . . . . . . . . . . . . . .
17、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . . . . . . . . . . . . . . .33 RadioFans.CN 收音机爱 好者资料库 4 SPECIFICATIONS Disc Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . .One Disc, 120 or 80 mm Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BURR-BROWN Delta Sigma 24bit Digital Filter . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . .8 Times oversample Analog Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 pole active Frequency Response . . . . . . . . . . . . . . . . . . . . . .+/- 0.5 dB, 5Hz - 20kHz De-Emphasis Error . . . . . . . . . . . . . . . . . . . . . . . .+
20、/- 0.3 dB THD (at 0 dB, 1kHz) . . . . . . . . . . . . . . . . . . . . . . .0.007% Intermodulation Distortion . . . . . . . . . . . . . . . . . . .90 dB 10 kHz . . . . . . . . . . . . . . . .80 dB Wow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . .Unmeasurable (Quartz Crystal Accuracy
21、) Output Impedance . . . . . . . . . . . . . . . . . . . . . . . .200 Output Level at 0 dB . . . . . . . . . . . . . . . . . . . . . . .2.2 V rms Digital Error Correction . . . . . . . . . . . . . . . . . . . . .CIRC with double error correction in C1 and C2 Digital Code Output . . . . . . . . . . .
22、 . . . . . . . . . . . .Sony / 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) 5 REAR PANEL / FRONT PANEL REAR
23、 PANEL FRONT PANEL 1. LINE OUT 2. DIGITAL OUT 3. NAD LINK 4. 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 () 6 DISASSEMBLY INSTRUCTIONS 1. Remove machine screws M 4.0 x 6.
24、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.2. 5 4
25、 3 1 2 7 6 6 7 BLOCK DIAGRAM U401 LC866008 SYSTEM CONTROL CPU & VFL DISPLAY DRIVER Q401- Q403 MUTE CIRCUIT Q301-Q304 MUTE J317 RCA JACK U302 PCM1732 M318 RCA JACK DIGITAL OUTPUT U402 NAD LINK MICRO- CONTROLLER U403 74HC00 NAND GATE NAD LINK IN M501 VFL DISPLAY NAD LINK OUT M319 RCA JACK 41 434448 11
26、64 159 1312 109 8 11 63 5758116 1924 47 1 2 16 13 3 42 44 43 23 24 14 13 35 36 33 34 39 40 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 T
27、GL CLV- CLV+ EFM U701 LB1641 MOTOR DRIVER U201 LA6541 FOCUS & TRACKING MOTOR DRIVER LOADING 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 M10
28、6M101M103M102 TIME M108 Q101 DAC U306U305 4 U501,U507 DIGITAL POWER U502-3,U506 ANALOGUE POWER +8V+5V+12V5V -12V D514-D517 RECTIFIER DIODES D501-D504 RECTIFIER DIODES D510-D511 ZENER DIODES -22V D506-D508 RECTIFIER DIODES U403 74HC00 NAND GATE M303 EMC FILTER L301 DIGITAL COIL M500 1 8 8 WIRING DIAG
29、RAM MAIN BOARD KEYBOARD LIVE BOARD DISPLAY BOARD M505B M120A M505A BROWN BLACK RED M502 M102 (15 PINS) M105 (6 PINS) M101 (5 PINS) CD MECHANISM TRANSFORMER TO CHASSIS NEUTRAL LIVE NAD IN/OUT 9 RF PATTERN TESTING Testing Point R132 Testing Point J334 NAD - C 541 PCB TESTING POINTS DIAGRAM TESTING PRO
30、CEDURE (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 time base: 0.5 S/div. (3) Observe the waveform is 2.0V p-p +/-5% and the eye p
31、attern 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 10 IMPORTANT NOTES INSTRUCTION FOR HANDLING OPTICAL SYSTEM BLOCK PICK-UP Electrostatic breakdown of the laser diode in the optical system block may occur due to a poten- tial diffe
32、rence 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 Human Body Be sure to wear a ground band (1M ohm) that is properly to remove any static electricity t
33、hat 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 be placed. 3. Because the static electricity charge on the clothing does not discharge through the
34、 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 objective lens in the optical system block. Therefore, keep your eyes at least 12 inches (30 cm) away from
35、 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 objective lens and confirm that the following operations are performed properly. (The optical system
36、 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 can be seen when the POWER switch is turned ON. (3) Vertical (up and down) movement of the ojectiv
37、e 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 its life or cause it to work improperly. 1.Grounding band 1M ohm 1M ohm 2.Conducttive Sheet or Coppe
38、r Plate 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 protect the pick-up before removal. NOTE: Replacement pick-up assemblies are supplied with the PCB pattern already protected. DO
39、 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 dis- charge does not ruin the diode, it can shorten its life or cause it to work improperly. When replac- ing the pick-up,
40、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 Conductive Gum Mat Soldering Iron with Ground wire Protective soldering place for laser diode 12 PCB LAYOUT LIVE BOARD KEY BOA
41、RD DISPLAY BOARD 1413 MAIN BOARD 1516 SCHEMATIC DIAGRAM D+5V RX DGND HDCD D+5V RX DGND DGND HDCD HDCD HDCD HDCD 0V 0V 0V 2.4V 1.6V 0V 0V 0V 4.9V 0V 4.8V *0V 4.8V *1.2V 4.9V *0V 5V 0V 4.3V 2.2V 5V 0V 0V 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
42、 2.5V 4.8V 4.9V *7.4V 7.8V *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 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 0V 2.4V 2.4V 2.4V 2.4V 2
43、.4V 2.4V 2.4V 2.4V 2.4V 2.4V 5V 0V 3.3V 1.6V 0V 4.7V 4.8V 0V 0V 0V 0V *1.8V 5V 5V 0V 4.9V 4.9V 5V 2.3V 2.2V 0V 0V 2.4V 2.3V 4.9V 4.9V 4.9V 0V 0V 2.4V 2.4V 3V *1.6V 0V *1.8V 0V 0V0V0V0V0V0V0V0V0V0V0V0V0V2.4V2.4V5V 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
44、4.9V 4.9V 2.3V 0.2V *0V 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 HDCD R428 560R DGND RESISTORS: M- METAL FILM F- FUSIBLE CARBON FILM UNLESS OTHERWISE SPECIFIED. NOTE: 1. RESISTORS
45、, UNLESS OTHERWISE SPECIFIED, ARE 1/8W. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V 10%. 3. COMPONENTS 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
46、TRAY CLOSE MODE. 64 VCC1 63 LDS 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
47、SPI 23 SP 22 AGND 21 FE 20 FE 19 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 17 IC BLOCK DIAGRAM U101: LA9240 EFMO DEFI EFMIN LRSY
48、C2F ROMXA DOUT ASDACK ASDFIN ASDFIR ASLRCK DACKO DFOLO DFORO LRCKO 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 VV
49、SS 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 FLAG PROCESSING CLV DIGITAL SERVO SUBCODE SEPARATION Q CRC MICROPROCESSOR INTERFACE Slice level control VCO clock Oscillator Clock control SYNCHRONIZATION DETECTION EFM DEMODULATION SERVO COMMAND Digital output 1bit DAC 10
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