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NAD M3 C/AH, Service Manual

The NAD M3 C/AH Service Manual is available for download for free on manualshive.com. This manual provides detailed instructions on how to operate and maintain your high-end audio equipment. Get the most out of your NAD M3 C/AH with this essential guide.

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13. R channel amplifier PCB (AMPR)

Top layer   Bottom layer

3-28

R424

R426

P4

0

3

C406

C41

6

R4

B

8

Q4

2

0

R4

8

7

C4

1

0

P404

D4

1

9

C417

D4

1

6

C4

0

9

R4B

1

Q4

2

1

R4

8

0

R4

B

5

R48

4

R459

R4

B

4

Q4

2

4

R483

C4

1

8

R468

IC4

0

4

CZ403

C440

CZ402

Q4

2

7

L4

02

R4

9

9

R4B

2

R429

Q4

2

2

R481

IC4

0

5

R4A

4

R4A

7

C4

2

3

C422

R48

5

J40

2

R4

B

7

Q4

1

9

R486

R449

R4B

3

Q4

2

3

R482

R448

R437

R4B

6

J40

1

Q4

2

8

P4

0

2

R41

9

R457

R4

2

2

P401

R456

Q4

2

5

Q4

5

5

Q4

1

5

TP

4

0

1

R454

C429

IC403

C4

2

7

D425

D424

D423

D422

C4

0

1

R455

D4

0

1

Q4

1

4

R4

3

8

Q4

3

8

R4

4

1

R4

4

2

R4

4

3

R4

9

1

IC4

0

2

Q4

1

8

R4

9

0

R4

3

9

C412

R4

4

7

R4

4

5

R446

R444

R496

Q4

1

6

R4

5

1

C4

2

6

C4

2

5

Q4

3

7

R489

R431

C428

VR

4

0

1

R488

C4

1

1

Q4

1

7

Q4

1

3

R4

3

0

IC4

0

1

R433

R4

3

2

R4

3

5

Q4

5

6

R4

A

6

R4

A

3

D407

D408

Q4

2

6

D409

R4

6

3

C4

2

0

R4

6

4

R4

6

7

R4A

5

D340

R4

A

2

R4

A

1

R462

C421

Q4

5

4

R46

1

R4

9

8

R466

R497

R4

9

5

R434

B401

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D

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RO

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IC

M3

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Channel

A

MP

VM

2.

0

RT4

0

1

D413

R478

R479

D412

RL402

RL401

D4

1

5

D414

R4

9

2

R49

3

Q4

5

3

Q452

R4

7

1

R4

7

5

Q4

5

0

R4

7

4

R4

7

2

R4

7

3

R4

7

0

C4

3

5

C4

3

4

R46

R45

D4

2

7

D4

2

6

R494

C432 C431

D404

D417

D418

D403

R409

R425

R450

R4

6

9

D411

C4

3

3

R4

0

7

Q4

0

8

R4

7

Q4

0

2

Q4

0

9

C405

R4

0

6

R411

Q4

2

9

R4

0

2

R4

0

3

R401

C419

R4

1

0

Q4

1

0

R4

3

R4

1Q

431

Q4

3

0

C414

Q40

4

C4

0

3

C402

Q4

0

3

R405

R4

0

4

Q4

0

1

R41

7

R4

0

8

L4

0

1

Q4

3

2

R44

Q4

1

1

C407

R4

2

R4

1

4

R41

3

Q4

0

6

R418

R412

C404

Q40

7

R415

R420

C408

Q4

1

2

D405

D420

D406

R423

D421

R421

R476

R4

1

6

C415

R427

R4

2

8

Q4

0

5

R453

R477

R458

R4

5

2

D40

2

CZ401

All manuals and user guides at all-guides.com

Summary of Contents for M3 C/AH

Page 1: ...M3 C AH MODE L M3 SE R VICE MANUAL NAD 2006 NAD ELECTRONICS INTERNATIONAL TORONTO M3 C AH Integrated Amplifier M3 C AH Integrated Amplifier Integrated Amplifier All manuals and user guides at all guid...

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST All manuals and user guides at all guides com...

Page 3: ...S 1 2 SERVICING PRECAUTIONS 1 3 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECIFICATIONS 1 6 7 1 1 ALIGNMENT PROCEDURE 1 4 5 POWER DRIVEN VOLTAGE...

Page 4: ...DAMAGED INSULATION INCLUDING A C CORD AND REPLACE IF NECES 5 NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE LEAD TENSION AROUND PROTRUNING METAL SURFACES MUST...

Page 5: ...nels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called El...

Page 6: ...RENT AMP BOARD 1 Connect a DC Millivoltmeter betweenTP301 2 pins then adjust VR301 200ohms for 7 8mV reading on meter 2 Connect a DC Millivoltmeter between TP401 2 pins then adjust VR401 200ohms for 7...

Page 7: ...nput Connect a AC Millivoltmeter to preout1L then adjust R565 for lowest output level 2 Volum set 0dB Input 2V 10KHZ common mode sinwave signal at R channel Balance input Connect a AC Millivoltmeter t...

Page 8: ...l 4ohms 480W 2ohms 785W Damping factor 150 Signal to noise ratio refer 1W A weighted 100dB Slew rate 20V sec T H D and SMPTE I M 0 01 Distortion from 250mW to rated output IHF I M CCIF IM and T I M di...

Page 9: ...dance Zone2 output impedance Controls Treble 5dB at 10kHz Bass 5dB at 100Hz Pre in Power AMP out input 2V Signal to Noise ratio A weighted 107dB ref 1 W out 500mV CD in SPK out 8 A weighted Rated dist...

Page 10: ...ECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 2 1 Cabinet and main frame section 2 2 2 Packing accessory section 2 3 3 Exploded view parts list 2 4 5 All manuals and user guides at all guide...

Page 11: ...020 A001 A002 C022 C026 C009 C025 C008 PR01 PR02 PR03 PR04 PR06 T001 C027 PR05 C023 C024 C028 R009 A003 A004 A005 A006 S001 S001 S001 S002 S019 S002 S003 S004 S019 S005 S007 S006 S009 S008 S010 S004 S...

Page 12: ...P006 P005 P001 P002 P003 P004 P008 P007 P011 P009 P013 P016 P015 P014 P012 P010 2 Packing accessory section 2 3 All manuals and user guides at all guides com...

Page 13: ...4 y s s A t o o F 0 0 1 0 8 4 0 3 8 A06 66 018005 0 Tem SW Clamper 2 C022 75 048022 0 Bus Bar Washer 4 C023 1 r e v o C C P 0 2 1 0 8 4 0 6 7 PR01 69 048032 0 Copper Spacer 2 C024 85 008001 1 Spacer...

Page 14: ...6 0 Screws BTB2 6 8 P001 88 048001 0 Shipping Box 1 P002 1 x o B t f i G 0 2 0 0 8 4 0 8 8 P003 89 048001 0 Polyfoam Bottom 1 P004 89 048002 0 Polyfoam Cap 1 P005 87 048004 0 Non woven cloth Bag 1 P00...

Page 15: ...CONNECT BOARD Circuit DIAGRAM 5 FRONT PANEL BOARD Circuit DIAGRAM 6 BALANCE INPUT BOARD Circuit DIAGRAM 7 POWER BOARD Circuit DIAGRAM PRINTED CIRCUIT DIAGRAMS 1 Preamp Main board PREM 2 Preamp LCH inp...

Page 16: ...standby button A ELECTRICAL TROUBLESHOOTING GUIDE 5V is Right NO YES Check the MCU on the keyboard Check U84 and Q82 Check the D81 Check F902 and F903 Check the main transformer Check B603 B604 B703 B...

Page 17: ...Check D990 D991 YES A 72V power supply is correct Check R646 R647 R746 R747 R622 Check B606 B706 Check Q609 Q610 Q611 Check the PCB track THE END YES 72V power supply is correct NO Check R623 Check Q...

Page 18: ...NO YES Wate for 10 second Press listen mode biamp key to change input and out put mode Input 2V RMS 1K sinewave turn volume to 0dB measure preoutput level and THD Level 2V 0 1V B Check U105 U205 U104...

Page 19: ...EL_CLK signal THE END Press Tone Key to change tone setting measure preout response YES Level 2V 0 1V THD 0 03 NO Check U109 U209 U111 U211 Check OPSEL_STB signal Press Z 2 record key to current input...

Page 20: ...DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1 SYSTEM 11MHz CLOCK 2 AT89C51 reset is high active 3 6 All manuals and user guides at all guides com...

Page 21: ...3 volume control DATA and CLOCK 4 REC ZONE select DATA and CLOCK 3 7 All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 22: ...5 Input select DATA and CLOCK 3 8 All manuals and user guides at all guides com...

Page 23: ...03 B604 72V REGULATOR B606 ON PSU ISC CIRCUIT ON PSU D602 D603 L CHANNEL ON L AMP AMPLIFIER B605 20V REGULATOR B606 ON PSU PRE AMP ON PRE AMP BALANCE AMP ON BAL OUTPUT RELAYS L CHANNEL ON L AMP L CHAN...

Page 24: ...BY PASS 40 60 80 100Hz PRE OUT1 PRE OUT2 INPUT SELECTOR BALANCE AMP DISC CD TUNER INPUT4 INPUT5 INPUT6 BALANCE 0 6 5dB SELECTABLE GAIN AMP STAGE 54dB ATTENUATOR 2dB STEP 5dB TONE CONTROL 1dB STEP BIAM...

Page 25: ...U84 U85 7400 FPP D81 Tri color LED FPP P4 0 P4 1 P4 2 P4 3 P4 4 P4 5 P4 6 P4 7 P5 0 P5 1 P5 2 P5 3 P5 4 P5 5 P5 6 P5 7 U108 U113 U208 U213 CD4094 PRE RL101 RL112 RL201 RL212 For Input Select and Biam...

Page 26: ...GND AGND AGND AGND GND GND C303 10uF 50V C304 10uF 50V C311 100UF 25V C312 100u 25V R335 10K R343 10K C316 0 1uF C317 0 1uF C309 0 1uF C310 0 1u 80V AGND AGND Q326 2SA970 Q325 C2240 R364 6K8 C321 4u7...

Page 27: ...X4621 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 COM1 COM2 NO2 IN2 V VL GND V IN1 NO1 U107 MAX4621 R1001 27 4 R1002 28 0 6 5 7 U102B AD8512ARZ 1D13 1N4148 1D14 1N4148 1R90 1M 1R91 10K C128 1U 1R93 1M 4 3...

Page 28: ...02 120V 5A 250V 1 2 3 4 CZ902 CON4 1 2 JP906 120V 1 2 JP907 230V 1 2 JP908 120V 1 2 3 4 CZ908 CON4 1 2 JP900 120V 1 2 3 4 1 2 7 8 5 6 3 4 Standby R Core 10VA Transformer To two main transformers to HS...

Page 29: ...VOLA HDATA VOLL_STB OPSEL_CLK 24VL 24VL 24VR 24VR RXD TXD 5V IR IN IR OUT TRIG TRIG OPSEL_CLK HCLK HDATA FUNC VOLR_STB VOLR_DATA VOLR_CLK VOLL_CLK VOLL_DATA VOLL_STB VOLA TONE OPSEL_DATA OPSEL_STB ZER...

Page 30: ...GND 5V P1 5 CEX2 27 P1 4 CEX1 25 P1 3 CEX0 23 P1 2 ECI 22 P1 1 T2EX 21 P1 0 T2 19 P0 7 AD7 3 P0 6 AD6 5 P0 5 AD5 6 P0 4 AD4 9 P0 3 AD3 11 P0 2 AD2 12 P0 1 AD1 14 P0 0 AD0 15 VCC 17 P2 0 A8 54 P2 1 A9...

Page 31: ...7 2SA1312 Q527 2SC2983 Q532 2SC2983 Q518 2SA1312 Q519 2SA1312 L52 100uH Q521 2SA1312 Q520 2SA1312 Q533 2SC3324 Q534 2SC3324 D5121N4148 D5131N4148 D5141N4148 Q522 2SA1312 D515 1N4148 Q535 2SC3324 Q531...

Page 32: ...C621 22n 100V R646 0 22 1W FS R647 0 22 1W FS R648 0 22 1 2W FS R649 0 22 1 2W FS C632 22n 100V C633 22n 100V C634 1000u 100V C635 1000u 100V R616 1K R617 1K R622 3R3 1 2W FS R619 1K R618 1K R620 1K R...

Page 33: ...3 1C54 1C26 J201 1R76 1R77 1R75 R120 R121 R128 R122 R123 R124 R125 R126 R127 R129 C140 1R83 1C28 C142 1D12 1Q14 1Q28 1R101 2C48 1C48 2Q18 2Q14 U210 Q205 R214 R270 2C41 2C43 2C42 L2 R285 2D17 J207 R279...

Page 34: ...04 1C04 C131 C130 C102 R103 RL101 R105 C121 R104 LRCA2 C103 C120 LRCA1 J208L R102 C101 R101 Top layer 1R52 R164 R264 2R106 1R32 1R27 R159 Q118 C113 R146 C109 1R28 Q119 R160 1R29 Q120 R161 2R37 1R38 Q2...

Page 35: ...04 C666 C627 J602 HEATSINK B604 C621 C620 C622 D603 R648 R649 R647 R646 C618 C617 D601 R601 D604 R610 P601 P602 P603 B603 C623 J603 C601 R667 D617 B606 Q606 Q605 C632 Q601 TP601 R651 C634 VR601 R654 D...

Page 36: ...C517 R532 R540 R558 C552 Q528 C546 C534 R564 Q54 R528D52 R531D55 C518 C540 CZ504 C520 C543 R550 C530 C525 R559 C556 C557 C555 C554 Q515 Q530 R562 R548 R570 R534 C526 R552 R563 C548 R561 Q535 R539 C529...

Page 37: ...991 C993 HS4 M3 B008 ENC VM1 0_pcb ER1 EC4 EC1 ER2 EC2 ECZ1 ER4 EC5 ES1 ER3 EC3 HS4 M3 B007 LSPK VM1 0_pcb C COYPRIGHT NAD ELECTRONICS HS4 M3 B007 RSPK VM1 0_pcb C COYPRIGHT NAD ELECTRONICS CZS1 CZS2...

Page 38: ...VOLRSTB HDATA VOLLDATA OPSEL DATA OPSEL STB C824 U87 C814 R828 R829 R830 C821 R848 C835 C812 R846 Q87 Q85 R825R824 U84 R844 Q86 U85 R849 IRIN RXD PRO VOLA TONE R847 IROUT TXD STBY C825 X81 C826 R834 R...

Page 39: ...ard bottom STBB CZ902 C904 CZ908 C903 CON4 NAD M3 STBB BOARD VM1 0 C COYPRIGHT NAD ELECTRONICS C908 IC1 C907 C906 B902 C902 C905 B901 C901 Top layer Bottom layer 3 25 All manuals and user guides at al...

Page 40: ...STBT BOARD VM1 0 C COYPRIGHT NAD ELECTRONICS put the jumper on those designator marked as 230V put the jumper on those designator marked as 120V Version select C version Version select AH version 120...

Page 41: ...30 IC301 R332 R333 R395 C311 R334 D302 Q354 R344 R396 VR301 C312 B301 D321 R321 R301 R326 D305 D306 R323 R327 C323 D320 C318 IC304 R376 R377 R37 R387 R313 Q302 P304 D316 R3B8 Q320 R3B3 R382 Q323 C322...

Page 42: ...C411 Q417 Q413 R430 IC401 R433 R432 R435 Q456 R4A6 R4A3 D407 D408 Q426 D409 R463 C420 R464 R467 R4A5 D340 R4A2 R4A1 R462 C421 Q454 R461 R498 R466 R497 R495 R434 B401 2005 C COPYRIGHT NAD ELECTRONIC M...

Page 43: ...10 MC107 MR109 MR117 MC106 MQ103 MQ101 MQ111 MC109 MR118 MQ115 MQ110 MQ112 MQ103 MC112 MR110 MR118 MC109 MQ115 MD109 MD110 MC107 MP101 MR109 MR117 MC106 MD109 MD110 MC111 MD107 M3 PreAmpModule VM1 0 M...

Page 44: ...0031 02 Chip Alu Electrolytic Capacitor 2 4 5 5 5 3 5 C 4 3 5 C 0 2 V 5 3 F u 0 1 2 06 33011 04 Chip Alu Electrolytic Capacitor 2 4 5 3 6 7 5 5 C 6 5 5 C 0 2 V 6 1 U 3 3 RESISTORS 2 07 90000 01 Chip R...

Page 45: ...hip Capacitor 1nF 50V 5 C810 C833 C834 C835 C836 C837 0805 6 2 26 10351 01 Ceramic Chip Capacitor 10nF 50V 5 C812 0805 1 2 26 10451 01 Ceramic Chip Capacitor 0 1uF 50V 80 20 C811 C815 C816 C817 C821 C...

Page 46: ...STANDBY PCB FR 4 1 6mm 165mm 48mm 1 2 94 048005 0 Warning Label 10 YELLOW PCB 2 2 1 P N 01 50307 02 STANDBY BOARD BOTTOM DIODE 2 33 30112 00 Diode Bridge DF1501S B901 B902 BRIDGEDF 2 ICS 2 03 01117 0...

Page 47: ...25 22361 05 Metallized Polyester Film Capacitor 22nF 63V 5 C340 Pitch 5mm 1 2 25 10412 10 Metallized Polyester Film Capacitor 0 1uF 100V 10 C316 C317 C322 C323 Pitch 7 5mm 4 2 25 10412 11 Metallized P...

Page 48: ...R350 R376 Pitch 10mm 2 2 07 20105 10 Metal Film Resistor 1M 1 4W 5 R352 R354 Pitch 10mm 2 2 07 30108 10 Oxidized Film Resistor 0 1 1W 5 R3B1 R3B2 R3B3 R3B4 R3B5 R3B6 R3B7 R3B8 Pitch 15mm 8 2 07 30229...

Page 49: ...412 10 Metallized Polyester Film Capacitor 0 1uF 100V 10 C422 C423 C416 C417 Pitch 7 5mm 4 2 25 10561 02 Metallized Polyester Film Capacitor 1uF 63V 5 C427 C429 Pitch 5mm 2 2 06 22951 05 Alu Electroly...

Page 50: ...07 30820 00 Oxidized Film Resistor 82 1 2W 5 R409 R423 Pitch 10mm 2 2 07 30331 11 Oxidized Film Resistor 330 1 2W 5 R432 R441 Pitch 10mm 2 2 07 30339 11 Oxidized Film Resistor 3 3 1W 5 R499 Pitch 12 5...

Page 51: ...Electrolytic Capacitor 10uF 100V 20 C642 C742 C643 C743 Pitch 5mm 4 2 06 22051 00 Alu Electrolytic Capacitor 22uF 50V 20 C654 C655 C754 C755 Pitch 5mm 4 2 06 22012 00 Alu Electrolytic Capacitor 22uF...

Page 52: ...CZ603 CZ703 CB10 2 2 17 07102 00 AC INLET GSP1 9500 1 R 30190 2PIN AC INLET 1 SWITCHES 2 11 01101 03 Power Switch RF 1003 BB2 S1 POWER2 1 AC FILTER 2 22 00010 00 EMI FILTER 250V 10A 50 60HZ EMI FILTER...

Page 53: ...Ceramic Chip Capacitor 10nF 50V 10 1C23 2C01 2C03 2C05 2C07 2C09 2C11 2C13 2C15 2C17 2C19 2C21 0805 12 2 26 10451 01 Ceramic Chip Capacitor 100nF 50V 80 20 1C24 1C25 1C33 1C34 1C35 1C36 1C37 1C38 1C3...

Page 54: ...01 Chip Resistor 4K7 5 1R23 2R01 2R02 2R03 2R04 2R05 2R06 2R07 2R08 2R09 2R10 2R11 2R12 2R13 2R14 2R15 2R16 2R17 2R18 2R19 2R20 2R21 2R22 2R23 0805 24 2 07 95101 01 Chip Resistor 5K1 1 1R47 1R48 1R55...

Page 55: ...p Resistor 220 5 MR109 MR114 MR118 0805 3 4 4 07 90223 01 Chip Resistor 22K 5 MR117 0805 1 4 4 07 90333 01 Chip Resistor 33K 5 MR101 0805 1 4 4 07 90100 05 Chip Resistor 10 1 2W 5 MR115 MR116 2010 2 4...

Page 56: ...6 1R27 1R28 1R29 1R30 1R31 1R32 1R33 1R34 1R35 1R36 1R37 1R38 1R39 1R40 1R41 1R42 1R43 1R44 1R45 1R46 2R24 2R25 2R26 2R27 2R28 2R29 2R30 2R31 2R32 2R33 2R34 2R35 2R36 2R37 2R68 2R69 2R70 2R71 2R72 2R7...

Page 57: ...tch 7 5mm 2 1 A07 10229 10 Carbon Film Resistor 2 2 1 4W 5 Taping 2 1 32 28042 00 Ground tap GND 8 4 TRANSFORMER AC CORD 1 18 53231 01 MAIN TRANSFORMER TORIOD TI 043813 AU ISS 7 ONE 70mm THE OTHER 90m...

Page 58: ...1 76 048012 0 PC COVER PC T 0 30 Clear Standby Board TOP 1 FASTENERS 1 61 023106 0 Self Taping Screws STB3 6 Back board 2 2 1 61 023206 0 Self Taping Screws BTB3 6 critesistor 2 front bracket 4 Back...

Page 59: ...53 10mm 6 1 94 048003 0 Barcode Label C version 117 155mm C 2 1 94 048004 0 Barcode Label AH version 117 155mm AH 2 1 94 048006 0 Barcode Label CH version 117 155mm BC 2 1 94 048013 0 Barcode Label C...

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