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1、NAD C 525BEE COMPACT DISC PLAYER C 525BEE COMPACT DISC PLAYER SERVICE MANUAL RadioFans.CN 收音机爱 好者资料库 - 2 - 3 - SAFETY INFORMATION CAUTION THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:- (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2、 (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 within the products enclosure; that m
3、ay 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 literature accompanying the appliance. CATUIO
4、N HGKJDHSGKJHGSJK ADVARSEL HGKJDHSGKJHGS KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK ADVARSEL HGKLFH;L;HJMNMD HFKLJHJLDKLJLKDJLKFHJHSGMMKJHGSJK VARING HGKJDHSGKJHGKLGDJH KLHKFG;LKNG;LKJGF;LKJGF;LKJFL;SJK VARO! HGKJDHSGKJHJBJKBKJBJKGS KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK VORSICT! HGKLFH;L;HHBHHJD JHFKLJHJLDKLJLKDJLKF
5、HJHSGKJHGSJK CLASS 1 LASER PRODUCT CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM. ADVARSEL - USYNLIG LASERSTRLING NR DEKSEL PNES OG SIKKERHEDSLS BRYTES. UNNG EKSPONERING FOR STRLEN. ADVARSEL - USYNLIG LASERSTRLING VED BNING, NR SIKKERHEDSAFBRYDERE ER U
6、DE AF FUNKTION. UNDG UDSTTELSE FOR STRLING. VARING - OSYNLING LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRRAR R URKOPPLADE. STRLEN R FARLIG. VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NKTMTNT LASERSTEILYLLE. L KAISO STEESEEN. VORSICT! - UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN DEC
7、KEL GEFFNET UND WENN SICHERHEITSVERRIEGELUNG BERBRCKT IST. NICHT DEM STRAHL AUSSETZEN. RadioFans.CN 收音机爱 好者资料库 - 2 - 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 No Part Number Descript
8、ion M502-M504 *CA 5120-0020+0 FU T1A 250V UL/CSA 5x20MM M502-M504 *EU 5120-0018+0 FU T1A 250V SEMKO/UDE 5x20MM M505 *CA 5120-0052+0 FUSE T1.6A 250V 5x20MM UL/CSA M505 *EU 5120-0050+0 FUSE T1.6A 250V 5x20MM SEMKO/VDE NOTE: : CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY. 2. Safety check out (Only U.S.A.
9、 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 with part
10、s recommended by the manufacturer. CONTENTS DESCRIPTION PAGE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11、 . . . . . . . . . . . . 5 DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 WIRING DIAGR
12、AM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 RF PATTERN TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 IMPORTANT NOTES . . . . . . . . . . . . .
13、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11 PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-13 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、 . . . . . . . . . . . . . . . . . . . . . . . . .14-18 IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-22 TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、. . . . . 23 ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-33 MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 MECHANISM EXPLODED VIEW PARTS LIST
16、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、 . . . . . . . . . . . . . . . .37-38 PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 RadioFans.CN 收音机爱 好者资料库 - 4 - 5 - SPECIFICATIONS Disc Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . One Disc, 120 or 80 mm Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BURR-BROWN Delta Sigma 20bit Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Times oversample Analog Filter . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 pole active Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.5 dB, 5Hz - 20kHz De-Emphasis Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.3 dB THD (at 0 dB, 1kHz) . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . 0.003% Intermodulation Distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 dB 10 kHz . . . . . . . . . . . . . . . . . . . . . . . . . 80 dB Wow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Un
21、measurable (Quartz Crystal Accuracy) Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 Output Level at 0 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 V rms Digital Error Correction . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、. . . IRC with double error correction in C1 and C2 Digital Code Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sony / Philips Serial data format Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12W CONTROLS Play / Pause, Stop, Random, Skip
23、(), Scan (), Open, Time, Repeat. PHYSICAL SPECIFICATIONS Dimensions 435 x 80 x 285 mm (Width x Height x Depth) Net weight 4 kg (8.8 lbs) Shipping weight 5.1 kg (11.22 lbs) - 4 - 5 - 2006 NAD C525BEE 1. LINE OUT 2. DIGITAL OUT 3. AC LINE CORD 1. POWER ON / OFF 2. DISC DRAWER 3. DISPLAY 4. OPEN 5. PLA
24、Y / PAUSE 6. TIME 7. STOP 8. REPEAT 9. RANDOM 10. SCAN Back () / Forward () 11. SKIP Back () / Forward () 12. STANDBY LED 2006 NAD C525BEE REAR PANEL / FRONT PANEL REAR PANEL FRONT PANEL - 6 - 7 - 7 6 6 5 4 3 1 2 DISASSEMBLY INSTRUCTIONS 1. Remove machine screws M 4.0 x 6.0 ( 1 to 4 ) from the side
25、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. - 6 - 7 - BLOCK DIAGRAM U40
26、1 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 36 60 L R L R CD AUDIO O/P 12 15 28 16 18 6 1 U301 CXD3017Q D
27、IGITAL 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 LIMIT SWITCH PICK UP DISC M113 REMOTE SENSOR CD MECHANISM U
28、NIT 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 RECTIFIER DIODES D506 RECTIFIER DIODES U504 POWER FOR EL LIGHT M
29、502 EL LIGHT Q307, Q309 Q312, Q313 RL101 RELAY U403 74HC00 NAND GATE M303 EMC FILTER L301 DIGITAL COIL M500 1 - 8 - 9 - 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 M505B M301 LIVE NEUTRAL M500A M102 (16PIN) M105 (6PIN
30、) M505A CD MECHANISM TRANSFORMER BOARD DISPLAY BOARD LED BOARD KEY BOARD LIVE BOARD M101 (5PIN) TO CHASSIS M805 BROWN M803 BROWN - 8 - 9 - RF PATTERN TESTING NAD - C 525BEE PCB TESTING POINTS DIAGRAM TESTING PROCEDURE (1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode. (2)
31、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). FIG. 1 (a) FIG. 1 (b) Poor eye pattern FIG.
32、 1 (C) Good eye pattern 3T4T5T 11T - 10 - 11 - 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 accumulated on clothing, human body, etc.
33、 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 Work Bench Be sure to place a co
34、nductive 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 to get in contact with the pick-up
35、 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 ON. (Operation Check Method for
36、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 when it is checked at this time.) (1
37、) 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. INCORRECT CORRECT NOTE: Laser diodes
38、 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 - 10 - 11 - PRECAUTIONS WHEN CHANGING LASER PICK-UP When removing t
39、he 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 HAVE FINISHED FITTING THE
40、 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, and so on, to protect
41、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 - 13 - MAIN BOARD - 14 - 15 - SCHEMATIC
42、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 5 XLAT 6 C
43、LOK 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 45 IGEN 4
44、6 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 CXD3017Q R201
45、4K7 R2021K R2031K R2041K R2051K R2061K R2071K R2081K R2091K R2101K R2111K R212 100K R213 10K R214 8K2 R215 4R7 R2160R R217 1K R21847K R21915K R220100K R2220R R22333K R224 10K R225100K R226 1M R227 0R R228 3K3 R229 3K3 R230 10K C2070.1u C208 0.1u C209 1500p C210 0.1u C211 27p C212 27p C214470p C21547
46、0p 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 V3V6 VC SFDR S
47、FDR 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 3900P 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 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
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