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NAD M22, Service Manual, Page: 2 / 55

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TABLE OF CONTENTS 

 

DESCRIPTION        

 

       P A G E 

 

SERVICE CAUTION…………………………………………………………....3-4

SPECIFICATIONS………………………………………………………….... 5

WIRING DIAGRAM…………………………………………………………….....6

  BLOCK DIAGRAM…………………………………………………….. ….......7-9

  ………………………………………………..…......12-24

 PCB LAYOUT………………………………………………………………..25-30

ELECTRICAL  PARTS  LIST…………………………………………......31-50

 

EXPLODED  VIE

W

…………………………………………………………

.

 51

-54

EXPLODED VIEW PARTS LIST……………………………………………....5

5

 

 

CIRCUIT DIAGRAMS

TROUBLE SHOOTING  A  GUIDE…………………......................................10

TROUBLE SHOOTING  B  GUIDE…………………......................................11

Summary of Contents for M22

Page 1: ...NAD SERVICE MANUAL M22 STEREO AMPLIFIER M22 STEREO AMPLIFIER...

Page 2: ...VICE CAUTION 3 4 SPECIFICATIONS 5 WIRING DIAGRAM 6 BLOCK DIAGRAM 7 9 12 24 PCB LAYOUT 25 30 ELECTRICAL PARTS LIST 31 50 EXPLODED VIEW 51 54 EXPLODED VIEW PARTS LIST 55 CIRCUIT DIAGRAMS TROUBLE SHOOTIN...

Page 3: ...ENTS FOR FRAYED LEADS 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 PROTRUNIN...

Page 4: ...Parts including Metal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such componen...

Page 5: ...Time to go to Standby mode at no input signal 30 minutes POWER CONSUMPTION Rated power 640 W 120V 60Hz 230V 50Hz Standby power 0 5 W Idle power 40 W DIMENSION AND WEIGHT Unit dimensions W x H x D 435...

Page 6: ...6...

Page 7: ...TOUCH TRI GGER I I C Anal og I nput unbal anced bal anced 100 120VAC 220 240VAC STB PSU 5V M AI N PSU VB VDR VAUX LDO AC ENABLE 3V3 Regul at ed suppl y LM 317 LM 337 17 5V Regul at ed suppl y LM 317 L...

Page 8: ...nly available when MCLR functionality is disabled 3 OSC1 CLKIN and OSC2 CLKOUT are only available in select oscillator modes and when these pins are not being used as digital I O Refer to Section 2 0...

Page 9: ...T COMPARATOR ENABLE LEADING EDGE BLANKING THERMAL SHUTDOWN DRAIN D REGULATOR 5 85 V BYPASS PIN UNDER VOLTAGE 1 0 V VT ENABLE UNDER VOLTAGE EN UV Q 115 A 25 A LINE UNDER VOLTAGE RESET AUTO RESTART COUN...

Page 10: ...urn w hite YES change STB board Check PWMsignal YES Logo led turn off Logo led turn red YES NO YES Check PSU board VB VAUX VDR RIGHT NO Check STB board STB 3V RIGHT YES Change PSU Board Check U1 U5 PW...

Page 11: ...Q500 Q502 Q508 circuit Change NC400 OEMBOARD Apply 1khz sinew ave to DUT Amplifier output correct YES NO INC INH signal correct YES Change NC400 OEMBOARD check 14 5V 5V Right NO checkQ505 Q506 Circui...

Page 12: ...24 R101 47K R100 1K R112 5K6 R113 5K6 Q104 2SA1312 5VA R122 5K1 GND R111 100K R11 5 15 K R12 5 15 K R129 100K GND 5VS R114 10R C103 10U GND 5VA R116 100K R12 7 10 0K C105 10U GND 5VA R11 7 10 0K GND A...

Page 13: ...M R576 309R R581 316R R580 3K24 R577 3K24 R572 3R3 R582 3R3 C532 100U 25V C551 100U 25V C533 100nZ C538 10U 25V C547 10U 25V C539 100nZ C548 100nZ C552 100nZ C540 10U 25V C543 10U 25V 17 5V 17 5V R567...

Page 14: ...12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 J3 CON_2x18MH VB GND GND VB VB OUTC OUTC OUTH OUTH B N I B N I CLIP CLIP IOUT IOUT D29 BAS316 Mechanical Spacer ALU Spacer 3...

Page 15: ...330p GND L3 10u GND L1 1u 8A R23 4R7 C23 4n7 GND OUTC L5 33n L2 33n R13 2R2 R33 2R2 R16 100k R36 100k C19 470n C30 470n D5 2V4 D13 2V4 R8 33k 1 J8 Mounting Hole GND 1 J9 Mounting Hole GND R41 1R R7 1...

Page 16: ...R57 1k2 R74 1k2 R52 10k R84 10k R63 1k5 R72 1k5 R77 1k5 R60 1k5 R56 2k7 R80 2k7 R50 3k R85 3k R49 820R R86 820R C47 1n8 C48 1n8 C52 1n8 C53 1n8 R76 47k R59 47k R65 1k8 GND C50 2n2 R78 360k R79 360k R...

Page 17: ...IN0 VREF ICSPCLK 18 RA0 AN0 C1IN ICSPDAT ULPWU 19 Vss 20 RA4 AN3 T1 G OSC2 CLK OU T V DD RA5 T1 CKI OSC1 CLKIN RA3 M CLR V PP RC5 CCP1 P1A RC4 C2OU T P1B RC3 AN7 C12IN3 P1C RC6 AN8 S S RC7 AN9 SDO RB7...

Page 18: ...O 3 1 4 C M O D 1 5 G PO 2 1 6 U 101 C Y 8CM BR 204 4 C111 10 0 N C110 10 U V CC GN D R132 0 R318 0 R154 0 GN D GN D GN D GN D R311 0 GN D GN D C17 4 2 2 N F GN D CS0 R11 8 10K R155 5 6 0 GN D GPO GPO...

Page 19: ...SchDoc PVBUS PVAUX ACDET VB VB VDR VDR VAUX VAUX nFATAL nAMPON 5VSB AMPOFF PSEN PSVAUX OVL PVSTART Sheet4 Main SMPS SchDoc PVBUS PSVAUX 5VSB Sheet3 Standby SMPS SchDoc 1 2 3 4 5 6 J2 B06P VL S 1 2 3...

Page 20: ...BC807W P R108 10k D41 BAS316 D40 BAT54J P R109 10k D34 BAS316 R90 1k 1 2 3 4 TR1 2mH 8A PVSTART P C5 1000u C6 1000u 1 2 K2A 12V T44 BC856BW R113 100k R114 100k R116 390k T41 BC846BW R106 100k R111 100...

Page 21: ...7 R17 10R T5 FDP61N20 8 9 TR4E TCT15 1 2 3 D21 BAW56W R41 1k T20 BC807 R40 10R T3 FDP61N20 R39 68R R42 68R C54 220p R18 68R R28 68R C43 220p 13 12 TR4G TCT15 1 2 3 D5 BAW56W R11 1k T11 BC807 R10 10R T...

Page 22: ...1u P R62 1k R53 1k R75 18k P C64 470p P R87 1k2 P R88 2k2 D30 BAS316 R77 47k P R52 47k P C65 1u R89 47k C67 1n T32 BC856BW R76 47k P R71 1k R82 1k D26 BAS316 C58 1u R67 1M R73 1M P P T27 BC856BW T23...

Page 23: ...to L Profile Mechanical M3x16 Mechanical M3x16 Mechanical Springwasher M3 Mechanical Springwasher M3 Mechanical M3 Mechanical M3 Mechanical 3x5x10mm Mechanical 3x5x10mm FETs Diodes to Heatsink Mechan...

Page 24: ...H C304 1000uF 10V CY301 1nF AC250V C306 100nF 50V C305 100nF 50V OP301 PC817 BP 2 S 5 S 6 D 4 UV 1 S 7 S 8 IC301 TNY274 R306 100R C308 100nF 50V 2 3 1 IC302 TL431 R309 2 2K 1 R308 10k R307 1k R310 2 2...

Page 25: ...PCB LAYOUT 1 MCU VM1 0 BOARD Top Layer Bottom Layer 25...

Page 26: ...2 2 AMP VM1 0 BOARD Top Layer Bottom Layer...

Page 27: ...2 3 NC400 OEM VM1 0 BOARD Bottom Layer Top Layer...

Page 28: ...4 TRIGGER VM1 1 BOARD Top Layer Bottom Layer 5 TOUCH VM1 1 BOARD 6 LED VM1 1 BOARD Top Layer Bottom Layer Bottom Layer Top Layer...

Page 29: ...5 SMPS VM1 0 BOARD Bottom Layer Top Layer...

Page 30: ...3 6 SMPS STB VM1 0 BOARD Bottom Layer Top Layer...

Page 31: ...3 2 O T F L 5 8 E T R G 4 2 3 3 C S 2 r o t s i s n a r T 0 0 4 2 3 3 0 1 3 8 1 1 Q V 0 0 1 P N P 3 9 5 T M M F R T S X r o t s i s n a r T 0 0 3 9 5 0 0 1 3 0 2 1 Q ICS R D A 4 2 3 M L p m A p O d a...

Page 32: ...1 R160 R164 R285 07 94702 00 Chip Resistor 47K 0603 1 10W 1 RC0603FR 0747KL R111 R116 R117 R127 R129 07 91003 00 Chip resistor 100K 0603 1 10W 1 RC0603FR 07100KL R326 R327 07 91203 00 Chip resistor 12...

Page 33: ...2792662 1000ohm 100MHz Imax 600mA TRANSISTORS 6 2 1 O T S Y A 0 2 2 1 A S K r o t s i s n a r T r e w o P 0 0 0 2 2 1 0 1 3 4 2 1 Q 6 2 1 O T S Y A 0 9 6 2 C S K r o t s i s n a r T 0 0 0 9 6 2 0 1 3...

Page 34: ...1009 00 Chip resistor 10 0603 1 10W 1 RC0603FR 0710RL R506 R536 07 91000 00 Chip Resistor 100 0603 1 10W 1 RC0603FR 07100RL r o t s i s e R p i h C 1 0 0 6 1 3 9 7 0 1 8 5 R 316 0805 1 8W 1 RC0805FR 0...

Page 35: ...Capacitor SMD 10nJ 50V 0805 NPO C502 C508 C521 26 10511 20 Ceramic Capacitor SMD 1uK 16V 0603 X7R M 7 4 r o t s i s e R p i h C 2 0 5 7 4 0 9 7 0 7 8 5 R 1 4W 1 r o t s i s e R p i h C 2 9 0 5 4 8 9...

Page 36: ...2850Y18SCA55 1 0 3 4 7 4 7 1 P S A n i P 8 1 2 h c t i P m m 4 5 2 r o t c e n n o C 4 5 2 r o 0 0 5 P r o t c e n n o C 4 5 2 6 0 6 3 5 2 2 3 1 2 0 5 P 2 54mmPitch 2 18Pin Gold Plating 5u 3F85R2118S5...

Page 37: ...D B r o t s i s n a r T 1 0 9 3 1 0 0 1 3 0 4 T F 0 2 2 O T 0 2 N 2 5 P D F T E F S O M 0 0 0 2 2 5 0 1 3 8 T 2 T ICS 8 C I O S R D 2 3 5 5 E N p m a 3 0 2 3 5 5 0 3 0 1 U U C M 2 1 0 9 6 6 1 3 0 2 U...

Page 38: ...10W 1 RC0603FR 0710KL R145 R151 07 91202 00 Chip Resistor 12K 0603 1 10W 1 RC0603FR 0712KL r o t s i s e R p i h C 0 0 2 0 3 1 9 7 0 0 5 1 R 13K 0603 1 10W 1 RC0603FR 0713KL r o t s i s e R p i h C 0...

Page 39: ...u 1 P A C c i m a r e C r e y a l i t l u M 0 2 1 1 5 0 1 6 2 9 6 C r o t i c a p a c p i h c 1 0 2 1 1 6 5 6 2 4 5 C 6 4 C 560pJ 100V 0805 NPO CC0805JRNPO0BN561 C47 C48 C52 C53 26 18251 11 Chip Capac...

Page 40: ...02 1 LED Lens 3mm e v i s e h d A e d i S e l b u o D M 3 m u G s n e L D E L 0 1 0 0 6 4 0 6 8 s n e L d e L PCB 4 Trigger BOARD N O I T P I R C S E D O N T R A P O N T I U C R I C 01 62204 00 Trigge...

Page 41: ...P F 4 0 4 0 0 1 2 3 1 1 0 1 N O C Copper Touch PCB 14 32701 00 FFC Cable UL1007 24AWG Red L 40mm PCB 6 LED BOARD N O I T P I R C S E D O N T R A P O N T I U C R I C 01 32706 00 LED Board 02 32706 00...

Page 42: ...r Rectifier MURA220T3G 1 0 0 0 2 0 0 3 3 0 1 D Transient Voltage Suppressor P4SMA200A D27 D32 D36 33 11200 05 Zener Diode PDZ12B 12V 0 4W SOD323 3 2 3 D O S W 4 0 V 5 1 B 5 1 Z D P e d o i D r e n e Z...

Page 43: ...sistor 10K 0603 1 10W 1 RC0603FR 0710KL r o t s i s e R p i h C 0 0 2 0 8 1 9 7 0 5 7 R 18K 0603 1 10W 1 RC0603FR 0718KL R5 R9 R60 07 92202 00 Chip resistor 22K 0603 1 10W 1 RC0603FR 0722KL R6 R20 R21...

Page 44: ...c i t y l o r t c e l E u l A 2 0 1 1 2 5 1 6 0 1 3 C 3 2 C C18 C19 C29 C30 C33 C34 06 22112 00 Alu Electrolytic Capacitor RD 220uF 100V 20 12 5X25MM C11 C20 C21 C22 C25 C26 C27 C32 06 22131 10 Alu El...

Page 45: ...her 3 0 8mm 62 010302 0 NUT M3 IIN934 M3 78 251006 0 Insupad Silicon Grey 20X26mm 86 251001 0 tape adhesive copper W 19 mm 3M 1181 L 16 5m 21 06181 00 Link 0 6 L 18mm MECH14 MECH18 85 138102 0 Nylon S...

Page 46: ...CAPACTIOR 5 0 1 0 2 V 0 0 4 F u 0 1 H 1 1 D C r o t i c a p a C c i t y l o r t c e l E u l A 0 0 2 4 0 0 1 6 0 1 0 3 C F5 0 m m 5 2 h c t i P 0 2 V 0 5 F u 0 1 3 6 2 D C r o t i c a p a C c i t y l o...

Page 47: ...ord T973 C JA15 16120 12 AC Cord LP 31 SJT 14 3C BLK L 1800 LS 13 or A15 16120 11 AC Cord AP 003 SJT 14 3C BLK L 2000 AP 005 or A15 16120 10 AC Cord T973 AH METAL PARTS 70 375910 0 Fascia Assy 70 3750...

Page 48: ...61 023206 0 Self Tapping Screw BTB3 6 Fascia Connect Sheet 4 Rear Panel 4 61 033208 0 Self Tapping Screw BTP3 8 Vent sheet 12 61 022205 6 Self Tapping Screw BTB2 6 5 MCU Board 5 Connector Bracket 4 RC...

Page 49: ...55004 0 Shoe Cover Pulp 118mmX111mmX14mm 88 355003 0A Cables Box 306mmX187mmX52mm k c a l b 0 3 5 W 0 2 6 L g a b n e v o w 0 2 0 0 5 5 3 0 9 o g o L D A N 88 351006 0A accesory box 88 355004 0A Clean...

Page 50: ...86 004030 0 Copperplate Label 40 30mm base color Pantone cool gray 6C 94 054002 0 Grouding Label 10 50...

Page 51: ...Lens 2 S021 61 063510 0 Machine Screw MF3X10 12 A007 70 138003 0 AL Spacer 12 S022 61 023212 0 Self Tapping Screw BTB3X12 10 A008 70 137003 0 AL Spacer 8 S023 61 063520 1 Self Tapping Screw BTB3X15 8...

Page 52: ...cessory Box Sheet 1 9 88 351006 0A Cable Box 1 10 89 355003 0 Accessory Pulp 1 11 89 355004 0 Shoe Cover Pulp 1 12 J71 267903 0 Masters II Feet Shoe 4 78 267001 0 Feet PAD 4 13 30 49622 01 Instruction...

Page 53: ...85 138102 0 Nylon Spacer 2 P007 85 355001 0 Threaded Spacer 1 S025 61 063506 1 Machine Screw MF3X6 4 S026 61 063508 1 Machine Screw MF3X8 4 S027 85 320002 0 Nylon screw M3 12N 1 S028 61 023512 1 Machi...

Page 54: ...C010 C011 C012 C013 C014 C007 C008 C009 R004 R005 R004 R005 R006 R007 R008 S001 S001 S002 S002 S003 S003 S004 S004 S004 S004 S005 S005 S006 S006 S006 S006 S006 S006 S006 S007 S007 S008 S008 S010 S011...

Page 55: ...00 SMPS STB BOARD 1 S003 61 023206 0 Self Taping Screws BTB3 6 6 S004 61 373506 0 Machine Screw M3 6 21 S005 61 023506 1 Machine Screw M3 6 Ni 4 F001 70 375010 0 Back Fascia 1 S006 61 023106 0 Self Ta...

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