NAD-M2-pwr-sm维修电路原理图.pdf
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1、LAUNAMECIVRES LAUNAMECIVRES M2 C/AH ? NAD 2010NAD 2010 NAD ELECTRONICS INTERNATIONAL TORONTO M2HA/C Direct Digital Amplifier Direct Digital Amplifier M2HA/C Direct Digital Amplifier RadioFans.CN 收音机爱 好者资料库 CONTENTS FRONT PANEL/REAR PANEL VIEW? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
2、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?3 SPECIFICATIONS? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 4 TROUBLE SHOOTING? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 5-6
3、 SCHEMATIC DIAGRAM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?7-22 PCB LAYOUT? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 23-34 ELECTRICAL PARTS LIST? ? ? ? ? ? ?
4、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?35-63 EXPLODED VIEW? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 64-65 EXPLODED VIEW PARTS LIST? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
5、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?66 PACKING DIAGRAM? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 67 PACKING PARTS LIST? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
6、 ? ? ? ? 68 DISMANTLING AMPLFIIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69-72 IMPORTANT FINAL PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 SERVICE SAFETY PRECAUTIONS 1. Replacing the Fuses CAUTION: FOR CO
7、NTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. REFERENCE NO.PART NUMBERDESCRIPTION Rear Panel AC Inlet A20-12103-00Littelfuse618 T10AL/250V POWER SUPPLY Board Upper FUSE701A20-12102-00Littelfuse618 T1AL/250V POWER SUPPLY Board Lower FUSE800A20-12312-02Littelfuse618
8、T3.15AL/250V 2. Safety-check out (North American model only) 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 symbolare critical with regard to the ris
9、k of fire and electric shock.Replace only parts recommended by the manufacturer. RadioFans.CN 收音机爱 好者资料库 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? RadioFans.CN 收音机爱 好者资料库 ANALOG INPUT (BALANCED, SINGLE-ENDED) Input impedance
10、 36 k/200 pF Input sensitivity 296 mV (ref.100W) 418 mV (ref. rated power) Maximum input level 5.6 Vrms (at -9dB level trim setting) Frequency response (A/D Converter section) 0.3dB (ref. 10 Hz - FS/2; FS = 48 kHz, 96 kHz, 192 kHz) DIGITAL INPUT (COAXIAL, OPTICAL, AES/EBU) Input impedance 75 (coaxia
11、l) 110 (AES/EBU) Sample rate 32 kHz to 192 kHz GENERAL SPECIFICATIONS Continuous output power (ref. 20 Hz 20 kHz, rated THD+N) - 8 200W 4 250W 2 300W Rated distorsion (SMPTE/CCIF IM, T.I.M distortion) 0.01% (ref. 100mW - rated power) Rated distortion (THD+N, with AES17 and AP passive 20kHz LP filter
12、s) 250W (ref. 1 kHz, 8, 0.1% THD) IHF Dynamic power - 8 300W 4 450W 2 600W Maximum output current 27A Signal/Noise ratio 95dB (A-weighted, ref. 1W) 118dB (A-weighted, ref. 200W) Damping factor 2000 (ref. 20Hz - 200Hz) Frequency response 0.3dB (ref. 10 Hz - FS/2; FS = 32 kHz, 96 kHz, 192 kHz) Channel
13、 separation 90dB (ref. 10 kHz, 4 , 1/3 rated power) Power Consumption Normal operation 500W (ref. 100 - 240V AC 50/60 Hz) Standby power 1W Idle power 100W DIMENSION AND WEIGHT Dimensions (W x H x D) 435 x 133 x 454 mm (Net) 435 x 148 x 502 mm (Gross*) Net weight 20.2 kg Shipping weight 25.8 kg * - G
14、ross dimensions include feet, volume knob and extended speaker terminals. RadioFans.CN 收音机爱 好者资料库 board Check PSUA FUSE701 YES Check PSUA Check DSP Board 5VDS RIGHT? Check IC700 IC701 YES Check cable from PSUA to DSP NONO Amber LED ON? No Power or Power shuts off immediately 3V3 RIGHT? NONO Short ci
15、rcuit of 3V3?Replace U106 Check U110 U301 U302 Check IC523 Check 108M MCLK Check U131 U118 U120 YES Check Q104 Q401 Check D402 YES NAD M2 shown on VFD? SPICS SPIBC SPID YES NO +/-53VL&R to AMP board correct after PSUA YES +7.5V -5V on AMP board right? YES NO3V3 3V3C 2V5 1V2 TO IC523 RIGHT? YES U351
16、U130 YES NO signal to IC523 correct? Check IC502 IC503 IC504 IC505 Check IC507 IC508 IC509 board Check PSUB FUSE800 Check IC800 U802 Check cable from PSUB to AMP NO NO board Check AMP board IC560 IC561 Check DSP board U128 U129 Check cable from DSP to AMP K703 Click? B module to AMP board Check Fuse
17、 on Main PSU module Change failed PSU module Check cables from Main PSU RadioFans.CN 收音机爱 好者资料库 Q617 Q618 D607 RL601 YES Display Check AMP main Board Startup error ? YES Check AMP module boardNONOOutput relay open and B N41VL N41VR RIGHT? NONO Short circuit of N41VL&R?Replace IC506 IC510 Check AMP M
18、ODULE Check cable from DSP to Analog Board D602 D603 Q603 Q604 YES Check AMP feedback signal Check AMP module YES Apply signal to analog1 YES NO RS232 IR IN TRIG function correct? YES Check DSP board U111 U116 NO YES NO NO U203 U205 U206 Check Analog board U215 U216 Check analog board Finish INT boa
19、rd Check INT board U301 U302 Q301 Check cables from DSP board to display input source name Q605 Q606 Q607 Q608 Q613 Q614 Q615 Q616 C610 C611 C641 C642 D609 D610 Q611 Q612 Output correct? Apply signal to coax1 Output correct? Apply signal to analog2 Output correct? Check DSP board U126 Check analog b
20、oard RL201 RL202 U128 U350 YES RadioFans.CN 收音机爱 好者资料库 m odd 1 m odb 2 m oda 3 fst 4 fsr 5 sckt 6 sckr 7 vccs 8 gnds 9 hckt 10 vcclq 11 gndq 12 hckr 13 sdo0 14 vcchq 15 sdo1 16 sdo2i3 17 sdo3i2 18 sdo4i1 19 sdo5i0 20 vccs 21 gnds 22 ss 23 m osi 24 m iso 25 sck 26 hreq 27 pint 28 reset 29 nc 30 vccp
21、31 pcap 32 gndp 33 extal 34 vcchq 35 gndq 36 vccql 37 ta 38 cas 39 wr 40 rd 41 vccc 42 gndc 43 aa1 44 aa0 45 a0 46 a1 47 vcca 48 gnda 49 a2 50 a3 51 a4 52 a5 53 a6 54 vcca 55 gnda 56 a7 57 a8 58 a9 59 a10 60 vccqh 61 a11 62 vcca 63 gnda 64 gndq 65 vcclq 66 a12 67 a13 68 a14 69 a15 70 vcca 71 gnda 72
22、 a16 73 a17 74 d0 75 d1 76 d2 77 d3 78 vccd 79 gndd 80 d4 81 d5 82 d6 83 d7 84 nc 85 nc 86 vcclq 87 gndq 88 vcchq 89 nc 90 gpio0 91 vccs 92 gnds 93 gpio1 94 gpio2 95 gpio3 96 tdo 97 tdi 98 tck 99 tms 100 U116 DSPB56364FU100 dgnd 3v3swp R147 10k dgnd dgnd dsprst dspbck dsplrck dspdi dspdo dspmosi dsp
23、miso dspsck dsphreq dspss C151 2n7 COG C150 100n 3v3swp dgnd dgnddgnddgnd dgnd dgnd dgnd dgnd dgnd dgnd dgnd dgnd dgnd dgnd 3v3swp 3v3swp3v3swp 3v3swp 3v3swp 3v3swp 3v3swp 3v3swp3v3swp 3v3swp 3v3swp 3v3swp 3v3swp 3v3swp C144 100n C145 100n C146 100n C147 100n C148 100n 3v3swp dgnd distributeonfour s
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