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1、NAD C 521i COMPACT DISC PLAYER C 521i COMPACT DISC PLAYER SERVICE MANUAL 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 VAR
2、O! 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
3、BRYTES. 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 ALTTIINAN
4、KTMTNT 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
5、 MAY 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 volta
6、ge 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 liter
7、ature 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 U
8、L/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
9、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 with parts recommended by the manufacturer. CONTENTS
10、DESCRIPTIONPAGE 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-21 IC BLOCK DIAGRAM . . . . . . . .
14、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-25 TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、 . . . . . . . . . . . . . . . .27-31 MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 MECHANISM EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 EXPLODED VIEW . . . . . . . . . . .
16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35 PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、. . . . . . . . . . . . . . . . . . . . . .36 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 Si
18、gma 20bit Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 Times oversample Analog Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 pole active Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+/
19、- 0.5 dB, 5Hz - 20kHz De-Emphasis Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+/- 0.3 dB THD (at 0 dB, 1kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.003% Intermodulation Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . .90 dB 10 kHz . . .
20、 . . . . . . . . . . . . . . . . . . . . .80 dB Wow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Unmeasurable (Quartz Crystal Accuracy) Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 Output Level at 0 dB . . . . . . . . . . . . .
21、 . . . . . . . . . . . . . . . . . .2.1 V rms Digital Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IRC with double error correction in C1 and C2 Digital Code Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sony / Philips Serial data format Power Con
22、sumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12W 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 i1 1.LINE OUT
23、 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 () 12. STANDBY LED i1 i REAR PANEL / FRONT PANEL REAR PANEL FRONT PANEL 6 DISASSEMBLY INSTRUCTIONS 1. Remove
24、machine screws M 4.0 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 F
25、igure No.2. Figure No.2. 5 4 3 1 2 7 6 6 7 BLOCK DIAGRAM U401 M38223E4HP4 SYSTEM CONTROL CPU & LCD DISPLAY DRIVER Q401- Q405 MUTE CIRCUIT Q301-Q304 MUTE M317 RCA JACK U302 PMC1710 M318 RCA JACK DIGITAL OUTPUT M501* LCD DISPLAY 8727 22 2 135178 35 1 2 16 13 3 61 62 63 51 43 39 40 46 45 38 2412 9 24 3
26、6 60 L R L R CD AUDIO O/P 12 15 28 16 18 6 1 U301 CXD3017Q DIGITAL SIGNAL PROCESSOR 26 1 27 2 12 16 13 17 U101 CXA2581 ANALOG SIGNAL PROCESSOR/SERVO RFAC RFDC FE SE Q104Q107 MOTOR DRIVER U201 BA6392 FOCUS & TRACKING MOTOR DRIVER LOADING MOTOR LOADING MOTOR LIMIT SWITCH SPINDLE MOTOR SLED MOTOR PU-IN
27、 LIMIT SWITCH PICK UP DISC M113 REMOTE SENSOR CD MECHANISM UNIT POWER TRANSFORMER AC POWER I / P KEYBOARD M110M109 REPEAT M105M108M107 RANDOM M102M106M104M103 TIME M101 Q101 DAC U306U305 11 U501,U507 DIGITAL POWER U502-3,U506 ANALOGUE POWER +8V+5V+12V5V -12V D514-D517 RECTIFIER DIODES D501-D504 RECT
28、IFIER DIODES D506 RECTIFIER DIODES U504 POWER FOR EL LIGHT M502 EL LIGHT Q307, Q309 Q312, Q313 RL101 RELAY U403 74HC00 NAND GATE M303 EMC FILTER L301 DIGITAL COIL M500 1 8 WIRING DIAGRAM 115V:J401,J404 230V:J403 L401 J403 J406 J407 J402 J404 J401 1723-006A-0000 8V 0V 0V 8V 15V 0V 15V ISSUE B M120C M
29、505B M301 LIVE NEUTRAL M500A M102 (16PIN) M105 (6PIN) M505A CD MECHANISM TRANSFORMER BOARD DISPLAY BOARD KEY BOARD LIVE BOARD M101 (5PIN) TO CHASSIS M805 BROWN M803 BROWN 9 RF PATTERN TESTING Testing Point NAD - C 521i PCB TESTING POINTS DIAGRAM TESTING PROCEDURE (1) Load the test disc (Sony Test CD
30、 YEDS-7) and set the unit into PLAY mode. (2) Connect the scope to R227 (Pin 15 of U101) and DGND (J144). 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 pattern is at its best shape (see FIG. 1). F
31、IG. 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 potential difference caused by electrostatic charge accumula
32、ted 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 that may be charged on the body. 2. Ground for
33、 Work Bench Be sure to place a conductive sheet (1M ohm) or copper plate with proper grounding on the work bench or other sur- face on which the pick-up is to be placed. 3. Because the static electricity charge on the clothing does not discharge through the body grounding band, do not let clothing t
34、o 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 the objective lens when the laser diode is
35、 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 should be at the lead-in area position whe
36、n 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 objective lens (2 or 3 times) will take place. INC
37、ORRECTCORRECT 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.Conductive Sheet or Copper Plate 11 PRECAUTIONS WHEN CHANGING LASER
38、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 NOT REMOVE THE SHORT CIRCUITS UNTIL YOU HA
39、VE FINISHED FITTING THE PICK-UP. Caution: Laser diodes are extremely susceptible to damage from static electricity. Even if a static discharge does not ruin the diode, it can shorten its life or cause it to work improperly. When replacing the pick-up, use a conductive mat, a grounded soldering iron,
40、 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 DISPLAY BOARD KEY BOARD LIVE BOARD LED BOARD 1413 MAIN BOARD 1516
41、SCHEMATIC DIAGRAM DISPLAY SL+ 1 SL- 2 RCIN1 3 SRDR 4 SFDR 5 VREFI 6 VREFO 7 GND 8 FRDR 9 FFDR 10 RCIN2 11 FCS+ 12 FCS- 13 GND1 14 MUTE 15 TRK+ 16 TRK- 17 RCIN3 18 TFDR 19 TRDR 20 VCC 21 VCC1 22 VBIN 23 SPDR 24 VBIN1 25 SP- 26 SP+ 27 GND2 28 GND 29 GND 30 U201 BA6392 SQSO 1 SQCK 2 XRST 3 SYSM 4 DATA
42、5 XLAT 6 CLOK 7 SENS 8 SCLK 9 VDD 10 ATSK 11 SPOA 12 SPOB 13 XLON 14 WFCK 15 XUGF 16 XPCK 17 GFS 18 C2PO 19 SCOR 20 COUT 21 MIRR 22 DFCT 23 FOK 24 LOCK 25 MDP 26 SSTP 27 SFDR 28 SRDR 29 TFDR 30 TRDR 31 FFDR 32 FRDR 33 VSS 34 TEST 35 TES1 36 XTST 37 VC 38 FE 39 SE 40 TE 41 CE 42 RFDC 43 ADIO 44 AVSS0
43、 45 IGEN 46 AVDD0 47 ASYO 48 ASYI 49 BIAS 50 RFAC 51 AVSS3 52 CLTV 53 FILO 54 FILI 55 PCO 56 AVDD3 57 VSS 58 VDD 59 DOUT 60 LRCK 61 PCMID 62 BCK 63 EMPH 64 XVDD 65 XTAI 66 XTAO 67 XVSS 68 AVDD1 69 AOUT1 70 AIN1 71 LOUT1 72 AVSS1 73 AVSS2 74 LOUT2 75 AIN2 76 AOUT2 77 AVDD2 78 RMUT 79 LMUT 80 U301 CXD
44、3017Q R2014K7 R2021K R2031K R2041K R2051K R2061K R2071K R2081K R2091K R2101K R2111K R212 100K R213 10K R214 8K2 R215 4R7 R2160R R217 1K R21815K R21915K R220100K R2220R R22333K R224 10K R225100K R226 1M R227 100 R228 3K3 R229 3K3 R230 10K C2070.1u C208 0.1u C209 1500p C210 0.1u C211 27p C212 27p C214
45、470p C215470p C2130.1u XLAT DATA SYSM XRST SQCK SQSO /SQSO /SQCK /XRST /SYSM /DATA /XLAT /CLOK /SENS /SCLK /GFS /SCOR /SQSO /SQCK /XRST /SYSM /DATA /XLAT /CLOK /SENS /SCLK /GFS /SCOR V3V6 C201 220p C202 220p C203 0.01u C204 220p C205 220p C206 330p CLOK SENS SCLK GFS SCOR CLOK SENS SCLK GFS SCOR V3V
46、6 VC SFDR SFDR SRDR SRDR TFDR TFDR TRDR TRDR FFDR FFDR FRDR FRDR SPDR SPDR VC VC C229 470U/16V TE SE FE FE SE TE C217 0.1u C216 0.01u C219 0.47u V3V6 C218100p V3V6 C221 103K RFDC RFAC C220 0.47u C2231500p V3V6 C222 0.1u TP214 AGND EMPH BCK PCMD LRCK XLAT DATA SYSM XRST SQCK SQSO RFDC RFAC 1 2 3 4 5
47、6 M105 CON6 FCS- FCS+ TRK- TRK+ C226 0.33u/50V D201 1N4001 L201 27uH VCC C230 100uF/16V FCS- FCS+ TRK- TRK+ EMPH BCK PCMD LRCK C227 0.1u C228 0.1u CN202 DEBUG CLKO DIG-OUT XRST D+8V NOTE: 1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS OTHERWISE SPECIFIED. 2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS OTH
48、ERWISE SPECIFIED. 1817 MCU P67/AN7 1 P66/AN6 2 P65/AN5 3 P64/AN4 4 P63/AN3 5 P62/AN2 6 P61/AN1 7 P60/AN0 8 P57/ADT 9 P56/TOUT 10 P55/CNTR1 11 P54/CNTR0 12 P53/RTP1 13 P52/RTP0 14 P51/INT3 15 P50/INT2 16 P47/SRDDY 17 P46/SCLK 18 P45/TXD 19 P44/RXD 20 P43/I1 21 P42/INT0 22 P41 23 P40 24 /RESET 25 P71/
49、XCIN 26 P70/XOUT 27 XIN 28 XOUT 29 VSS 30 P27 31 P26 32 P25 33 P24 34 P23 35 P22 36 P21 37 P20 38 P17/S31 39 P16/30 40 P15/29 41 P14/S28 42 P13/S27 43 P12/S26 44 P11/S25 45 P10/S24 46 P07/S23 47 P06/S22 48 P05/S21 49 P04/S20 50 P03/S19 51 P02/S18 52 P01/S17 53 P00/S16 54 P37/S15 55 P36/S14 56 P35/S13 57 P34/S12 58 S11 59 S10 60 S9 61 S8 62 S7 63 S6 64 S5 65 S4 66 S3 67 S2 68 S1 69 S0 70 VCC 71 VREF 72 AVSS 73 COM3 74 COM2 75 COM1 76 COM0 77 VL3 78 VL2 79 VL1 80 U401 M38223E COM0 COM1 COM2 COM3 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 S
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