NAD C 521i Service Manual
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NAD C 521i Service Manual

Nad c 521i compact disc player service manual
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NAD
C 521i
C O M PA C T
DISC PLAYER

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Summary of Contents for NAD C 521i

  • Page 1 C 521i C O M PA C T DISC PLAYER...

  • Page 2: Safety Information

    SAFETY INFORMATION CAUTION CAUTION VARING - INVISIBLE LASER RADIATION WHEN OPEN AND - OSYNLING LASERSTRÅLNING NÄR DENNADEL ÄR INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM. ÖPPNAD OCH SPÄRRAR ÄR URKOPPLADE. STRÅLEN ÄR FARLIG. CLASS 1 VARO! - AVATTAESSAJASUOJALUKITUS OHITETTAESSAOLET ADVARSEL - USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG ALTTIINANÄKTMÄTÖNTÄ...

  • Page 3: Table Of Contents

    SERVICE SAFETY PRECAUTIONS Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. Reference No Part Number Description M502-M504 5120-0020-0 FU T1A 250V UL/CSA 5x20MM M502-M504 5120-0018-0 FU T1A 250V SEMKO/UDE 5x20MM M505 5120-0052-0 FUSE T1.6A 250V 5x20MM UL/CSA...

  • Page 4: Specifications

    SPECIFICATIONS Disc Capacity ........One Disc, 120 or 80 mm Decoding .

  • Page 5: Rear Panel / Front Panel

    REAR PANEL / FRONT PANEL REAR PANEL LINE OUT AC LINE CORD DIGITAL OUT FRONT PANEL POWER ON / OFF STOP DISC DRAWER REPEAT DISPLAY RANDOM OPEN 10. SCAN Back ( ) / Forward ( PLAY / PAUSE 11. SKIP Back ( ) / Forward ( TIME 12.

  • Page 6: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. Remove 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 .

  • Page 7: Block Diagram

    BLOCK DIAGRAM DISC...

  • Page 8: Wiring Diagram

    WIRING DIAGRAM 230V:J403 115V:J401,J404 ISSUE 1723-006A-0000 J403 J404...

  • Page 9: Rf Pattern Testing

    RF PATTERN TESTING Testing Point NAD - C 521i 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 R227 (Pin 15 of U101) and DGND (J144).

  • Page 10: Important Notes

    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. A ground must be provided as follows to prevent any electrostatic charge during unpacking or repair work.
  • Page 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 NOT REMOVE THE SHORT CIRCUITS UNTIL YOU HAVE FINISHED FITTING THE PICK-UP.

  • Page 12: Pcb Layout

    PCB LAYOUT DISPLAY BOARD KEY BOARD LIVE BOARD LED BOARD...
  • Page 13 MAIN BOARD...

  • Page 14: Schematic Diagram

    SCHEMATIC DIAGRAM DISPLAY CN202 DEBUG /SQSO /SQCK /XRST V3V6 R206 XLAT XLAT /SYSM R205 DATA DATA /DATA R204 SYSM SYSM /XLAT R201 XRST XRST /CLOK R211 CLOK R202 SQCK CLOK SQCK /SENS R210 SENS R203 SQSO SENS SQSO /SCLK R209 SCLK SCLK /GFS...
  • Page 15 R340 C309 CD/CDR 47uF/10V 1/2X D+5V R308 SQCK R301 1K R302 6K2 R304 2K R306 1K SCLK R309 UNLD UNLD LOAD M113 LOAD KEY309 R310 KEY310 KEY308 KEY306 XRST KEY304 XRST F.SCAN KEY302 B.SCAN REPEAT TIME RANDOM OPEN/CLOSE XLAT CLOK CLOK XLAT KEY307...
  • Page 16 RF AMP...
  • Page 17 POWER 4700p C800 POWER_SW M802...

  • Page 18: Ic Block Diagram

    IC BLOCK DIAGRAM MAIN BOARD U101: CXA2581N AC_SUM EQ_IN MAIN BOARD U201: BA6392FP CH1OUTF 28 GND CH1OUTR 27 CH4OUTF LEVEL SHIFT RCIN1 26 CH4OUTR CH1RIN 25 VBIN INTER 190K FACE CH1FIN 24 VSIN 100K VREFIN 23 VBIN VREFOUT 22 VCC THERMAL SHUTDOWN CIRCUIT...
  • Page 19 MAIN BOARD U301: CXD3017Q DAC Block TES1 TEST Clock Error XRST Generator Corrector RMUT Serial-In RFAC demodurator Interface Interface LMUT ASYI Asymmtery ASYO XTAI Over sampling Timing Corrector Digital Filter Logic BIAS XTAO 3rd-Order XPCK Noise Shaper FILO Sub Code Digital Digital Processor...
  • Page 20 MAIN BOARD U302: PCM1710U LRCIN ML/DSD Input Interface MC/DM2 Digital Mode Filter Control BCKIN MC/DM1 CLKO MUTE Timing Control MODE CKSL Noise Shaper DGND DGND 5-Level DAC 5-Level DAC Right Left VCC2R VCC2L AGND2R AGND2L Low Pass Filter Low Pass Filter Right Left EXT1R...
  • Page 21 MAIN BOARD MAIN BOARD U305, U306: NE5532 U403: TC74HC00AP AMPLIFIER 1 AMPLIFIER 2 OUTPUT INVERTING INPUT OUTPUT – + + – NON-INVERTING INVERTING INPUT INPUT NON-INVERTING V – INPUT MAIN BOARD MAIN BOARD U501, U502, U504, U503: UPC79M12HF U506, U507: 78XX...

  • Page 22: Troubleshooting Guide

    TROUBLESHOOTING GUIDE SET POWER SWITCH TO ON. CHECK FUSES M502, M503, CHECK POWER SUPPLY POWER SUPPLY PATTERNS OPEN IS POWER TURNED ON ? M504, M505 OPEN ? CIRCUIT NORMAL ? OR U501-U504,U506-U507 DEFECTIVE. IS OSCILLATOR CIRCUIT M502, M503, M504, M505 CRYSTAL M401 DEFECTIVE.

  • Page 23: Electrical Parts List

    ELECTRICAL PARTS LIST Reference No. Part No. Description DISPLAY ASSEMBLY PCB BOARD 1000 * PCB-N0A10C-DISP DISPLAY ASSEMBLY BACKLIGHT M502 2450-1146-0 EL BACKLIGHT M501 2460-1340-1 LCD DISPLAY (522) IR SENSOR M113 4816-043T-3 IR SENSOR PIC-26043TM2 CONN ECTOR WIRES M505A, M505B 7009-9630-0 CONN WIRE ASSY 14P 100MM M509A 7010-1300-1...
  • Page 24 Reference No. Part No. Description POWER SWITCH M802 5200-3151-0-01 POWER SWITCH TRANSFORMER M810 1806-2170-0 EMI FILTER TLN12UA 150W3R0 TRANSFORMER ASSEMBLY 4000 *AH PCB-N0A10C-PWR TRANSFORMER ASSEMBLY 4000 *C PCB-N0A11C-PWR TRANSFORMER ASSEMBLY TRANSFORMER M500 1806-2194-0 EI-57 TRANSFORMER 740 AC3 FUSE ASSEMBLY FUSES M502-M504 5120-0020-0 FU T1A 250V UL/CSA 5x20MM...
  • Page 25 Reference No. Part No. Description C330,C370 153F-103J-5-IM CM 50V 0.01µF 5% RL 5X7 C331 157C-226M-5-IUK CE 10V 22µF 20% RL 5X11 C352,C353 150F-331K-5-GE CC 50V 330pF 10% RL 4x3 C356,C357 153F-272J-5-JM CM 50V 2700PF 5% RL 5.5x7 C362,C363 153F-472J-5-KM CM 50V 4700pF 5% RL 6x7 C366,C367 158F-681J-5-KW CP 50V 680pF 5% RL 6x12...
  • Page 26 Reference No. Part No. Description M317 2113-1300-0 2P RCA JACK W/R AU M318 2113-1170-0 1P RCA JACK YL AU M500A 2102-071S-004 WF T8 DE 7PIN COULOMB M505A,M505B 2102-141S-004 14P ST. WAFER P=2.5mm M509 2102-021S-004 2P ST.WAFER P=2.5mm M509A 2102-022S-008 WAFER 2PIN PITCH=2.54MM CRYSTALS M302 2300-0110-0...
  • Page 27 Reference No. Part No. Description R311,R331,R335,R347 4701-102J-C RCF 1/8W 1K 5% ATS R312-R314 4701-223J-C RCF 1/8W 22K 5% ATS R317 4711-362A-2 RMF 1/8W 3.6K 1% AT R318,R330,R338,R346 4701-103J-C RCF 1/8W 10K 5% ATS R320 4701-471J-C RCF 1/8W 470R 5% ATS R321-R323 4701-472J-C RCF 1/8W 4.7K 5% ATS...

  • Page 28: Mechanism Exploded View

    MECHANISM EXPLODED VIEW WSL-2130CCM (x2) (x4) (x2) (x2) (x4) (x2) (x2) (x2)

  • Page 29: Mechanism Exploded View Parts List

    MECHANISM EXPLODED VIEW PARTS LIST Item Part No. Description 4102-9000-0 Outside Main Chassis 4102-9001-0 Tray 4102-9002-0 Subchassis 4102-9003-0 Chucking Plate 4102-9004-0 Drive Gear 4102-9005-0 Control Cam 4102-9006-0 Chucking Pulley 4102-9007-0 Gear Cover 4102-9008-0 Tray Gear 4102-9009-0 Intermediate Gear 4102-9010-0 Loading Pulley 4102-9011-0 Motor Pulley 4102-9012-0...

  • Page 30: Exploded View

    EXPLODED VIEW...

  • Page 31: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Item Part No. Description 0001 1465-5705-3 FASSCIA W/SS PAINT 0002 1402-3781-2 STARP 0003*AH 1402-3520-0 CHASSIS W/SS PAINT 0003*C 1402-3521-0 CHASSIS W/SS PAINT 0005 1402-3530-0 COVER 0006 2442-1000-0 POWER BUTTON 0007 4154-4191-0 CD DOOR W/SS PAINT 0008 3716-4313-0 WINDOW LENS W/SS 0010...

  • Page 32: Packing Diagram

    REMOTE CONTROL HANDDSET 1497-1302-0 REMOTE CONTROL POLYBAG 4301-4165-0 INSTRUCTION MANUAL 1497-1062-0 MANUAL POLYBAG 1435-8300-0-2 CARTON BOX Proprietary information for servicing purposes only. The information herein may not be used com- mercially without the prior written agreement of NAD Electronics International, Toronto, Canada.
  • Page 33 © NAD 2002 NAD ELECTRONICS INTERNATIONAL TORONTO...

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