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NAD M22 Service Manual

Summary of M22

  • Page 1

    Nad ser vice manual m22 stereo amplifier m22 stereo amplifier.

  • Page 2: Table Of Contents

    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 electri...

  • Page 3

    Subject: graphic symbols product safety servicing guidelines for audio products a.C. Voltmeter good earth ground such as the water pipe. Conduit. Etc place this probe on each exposed metal part caution : do not attempt to modify this product in any way, never perform custom- ized installations witho...

  • Page 4

    Servicing precautions caution : before servicing the stereo amplifier covered by this service data and its supplements and addends, read and follow the safety precautions. Note: if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions ...

  • Page 5

    Overall specifications continuous output power into 8 ohms and 4 ohms ≥ 250 w (ref. Rated thd, 20 hz – 20 khz, both channels driven) rated thd (250 mw to rated power, ccif imd, dim 100) ≤0.005 % ( ref. 20 hz - 20 khz) ihf dynamic power 8 ohms : 355 w 4 ohms :640 w 2 ohms : 620 w damping factor >800 ...

  • Page 6

    6.

  • Page 7

    7 op lm e49720 cm r tl072 dc servo tl072 op lm e49720 hypex nc400 oem m odule m icro controller iic/spi/gpio pic18f26k20 led touch trigger iic analog input unbalanced balanced 100-120v a c 220-240v a c stb psu 5v m ain psu +/-vb +/-vdr +/-vaux ldo ac enable 3v3 regulated supply lm 317/lm 337 +/-17.5...

  • Page 8

    Instruction decode and control porta portb portc ra4/t0cki/c1out ra5/an4/ss/hlvdin/c2out rb0/int0/flt0/an12 rc0/t1oso/t13cki rc1/t1osi/ccp2 (1) rc2/ccp1 rc3/sck/scl rc4/sdi/sda rc5/sdo rc6/tx/ck rc7/rx/dt ra3/an3/v ref + ra2/an2/v ref -/cv ref ra1/an1 ra0/an0 rb1/int1/an10 data latch data memory add...

  • Page 9

    Clock oscillator 5.85 v 4.9 v source (s) s r q dc max bypass/ multi-function (bp/m) + - vilimit fault present current limit 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 μa 25 μ a line ...

  • Page 10

    Yes check stb board check led board 5v right? Check ic301 circuit no no logo amber led on? No pow er or pow er shuts off immediately 5vl right? No check l104 c175 c176 yes check q110 q111 q114 q115 q116 circuit change led board yes no b touch pow er key logo led turn w hite? Yes change stb board che...

  • Page 11

    B f i n i sh rear panel led show green? Yes no led turn off? Rear panel led show red? No yes check d500 u505 circuit, yes check q500 q502 q508 circuit change nc400 oem board apply 1khz sinew ave to dut amplifier output correct? Yes no inc inh signal correct? Yes change nc400 oem board check+/-14.5v,...

  • Page 12: Circuit  Diagram

    1.Mcu vm1.0 12 xm100 hole c162 22n r282 100r gnd xm101 hole c163 22n r283 100r gnd 3v3s c 13 8 22 u/ 6v 3 c139 100n gnd mclr/vpp/re3 1 ra0/an0/c12in0- 2 ra1/an1/c12in1- 3 ra2 4 ra3 5 ra4 6 ra5/hlvdin 7 vss 8 osc1/clkin/ra7 9 osc2/clkout/ra6 10 rc0 11 rc1 12 rc2 13 rc3/sck/scl 14 rc4/sdi/sda 15 rc5/s...

  • Page 13

    Xm500 hole c527 22n r554 100r gnd xm501 hole c528 22n r555 100r gnd xm502 hole c536 22n r578 100r gnd 1 2 3 4 5 6 7 8 9 10 11 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 p500 amp module nc nc vpp vpp gnd gnd gnd gnd gnd gnd vpn vpn vdr outc outc outc outc outc fbc fbh ...

  • Page 14

    3.Nc400 oem vm1.0(1/4) 1 +isense+ +isense- ctrlh ctrll sccp -isense- -isense+ outh outc fblh fblc vsw ls en s e+ ls en s e- power stage ctrlh ctrlc inh inc fbh fbc enable psrr+ psrr- fblh fblc clippos clipneg modulator c1 100n c2 100n +vb -vb gnd +vb gnd c3 4n7 r1 4r7 scl/nfatal a0/nampon inb+ inb- ...

  • Page 15

    3.Nc400 oem vm1.0(2/4) 1 +isense+ +isense- ctrlh ctrll sccp -isense- -isense+ outh c18 150p r15 12r t6 bc817w t3b mbt3906 d3 bas316 r17 1k t3a mbt3906 1 2 3 d4 bav70w r11 470r r10 10k c29 150p r35 12r t1 bc817w d11 bas316 r37 1k 1 2 3 d12 bav70w r31 470r r30 10k l6 1u/8a gnd gnd gnd 1 2 3 d1 bav99w ...

  • Page 16

    3.Nc400 oem vm1.0(3/4) 1 ctrlh ctrlc inh inc fbh fbc enable r48 220r gnd t19b bc846s t19a bc846s r83 560r r87 1k r88 1k r89 560r t22 bc846bw r95 4k7 r69 560r r73 560r r67 2k7 r68 2k7 r81 270r r82 270r t21 bc846bw t18a bc846s t18b bc846s r90 120r c49 100n -vb vdr t15b bcm856s t15a bcm856s r71 47k r66...

  • Page 17

    3.Nc400 oem vm1.0(4/4) 17 -hvps +hvps +isense -isense t32 bcv62b t37 bcv61b d21 12v d23 12v d22 bas316 d24 bas316 t33 mmbt5401 t35 mmbt5551 r113 150k r131 150k r112 82r r135 82r r111 390r r137 330r c59 10n c68 10n r114 10k r125 10k r129 10k r126 10k gnd c74 470n vdr -vb d27 5v6 r148 68r t40 bd139 1 ...

  • Page 18

    Trig in c165 100n r2 8 7 1 0 k j r2 8 8 6 k 8 d13 8 4 v7 232 gnd 5 1 4 2 3 j 10 1a 17 - 0 2 0 0 1-5 5 r28 4 4 7 0 r 232 gnd 1 pb 1 1 pb 2 2 1 sw 1 sw (t ou ch ) 1 2 3 4 p1 10 t o m a in wh i t e l e d b r i g h t n e s s adj l 100 fb 1 2 3 4 con 10 1 l 105 fb 5v l c 1 7 6 2 u 2 c 1 7 5 1 0 0 n d gn ...

  • Page 19

    5.Smps vm1.0(1/5) 1 2 j1 jst_b2p3_vh acdet pvaux psvaux pvbus l n pvstart sheet2 - input voltage selection.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 j...

  • Page 20

    5.Smps vm1.0(2/5) 2 l n 1 2 3 4 tr3 2mh/8a c8 220n r51 1m r50 1m r1 10r i hv i hv i hv i hv i hv i hv c2 1000u c1 1000u i hv 3 5 4 8 7 6 k2b 12v 3 5 4 8 7 6 k1b 12v r122 1m r123 1m inrush current limiter ac1 ac2 d37 bat54 j automatic mains voltage selection vdc r55 1m r54 1m c70 10n r102 10k t39 bc8...

  • Page 21

    5.Smps vm1.0(3/5) 21 psvaux ptc isen pvctrl prot sheet5 - main smps control.Schdoc 1 2 tr4a tct15 1 2 3 d42 baw56w r121 10r r118 1k r117 100r t45 bc807 t46 bc817 t1 spw32n50 3 4 tr4b tct15 1 2 3 d22 baw56w r65 10r r64 1k r63 100r t22 bc807 t21 bc817 t2 spw32n50 p r99 68r r98 68r c72 220p r86 68r r79...

  • Page 22

    5.Smps vm1.0(4/5) 2 psvaux d27 12v t24 bcp56 p c13 22u p pvctrl r78 10r r74 10r c55 1u 1in+ 1 1in- 2 2in+ 16 2in- 15 dtc 4 fb 3 ref 14 opctl 13 vcc 12 c1 8 e1 9 c2 11 e2 10 rt 6 ct 5 gnd 7 1in+ i i 1in- i i 2in+ i i 2in- i i d tc fb r e f o pc t l v c c c 1 e 1 c 2 e 2 r t c t g n d u5 tl494 p p t25...

  • Page 23

    5.Smps vm1.0(5/5) 23 1 2 3 d16 baw56w r30 1k r31 47k c44 220n s s t16 bc856bw r27 47k c40 100n r21 47k t18 bc846bw c47 1u s c46 100n s d15 5v6 s r32 1m t15 bc856bw d12 bas316 s vsw smps_on +5vsb r33 1m r24 47k t13 bc846bw r20 47k s s nampon t9 bc856bw t10 bc846bw r8 10k r9 22k r15 220r s s d7 bas316...

  • Page 24

    6.Smps stb vm1.0 24 a c 90 v /2 30 v± 10 % m a i n i n xm301 hole z v 30 1 14 d 47 1k cx301 1uf/275vac cx303 100nf/275vac 1 2 4 3 l303 8mh/9a 1 p302 ac-n 1 p301 ac-l r302 180k r304 180k cx302 470nf/275vac cy302 1nf/ac250v cy303 1nf/ac250v 1 2 4 3 l302 4mh/9a th301 sck10054 5r/4a dsgnd 5vds d302 byg2...

  • Page 25: Pcb  Layout

    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

    Pcb-1: mcu 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 a16-62201-21 mcu board vm1.0,fr-4,1.6mm,2layers,2oz,tg130 diodes d166, d167 33-44148-16 switch diode smd cd4148wp d101, d104, d109, d111, d134, d135, d136, d137, d139, d140, d141, d142, d146, d147 33-40352-01 switch diode 1ss35...

  • Page 32

    R o t s i s e r p i h c 0 0 - 1 0 5 7 9 - 7 0 0 8 1 r 7.5kΩ,0603,1/10w,±1%,rc0603fr- 077k5l r o t s i s e r p i h c 0 0 - 2 0 2 1 9 - 7 0 3 6 1 r 12kΩ,0603,1/10w,±1%,rc0603fr- 0712kl k 3 . 4 r o t s i s e r p i h c 0 0 - 1 0 3 4 9 - 7 0 8 2 3 r Ω ,0603,1/10w,±1%, 7 4 . 0 r o t s i s e r p i h c 3 0 ...

  • Page 33

    C104, c122, c124, c125, c129, c132, c133, c136, c139, c140, c143, c147, c152, c155, c158, c164, c173 26-10451-10 ceramic chip capacitor 100nk,50v,0603,x7r r 5 x , % 0 1 , 3 0 6 0 , v 6 1 , f n 0 7 4 d m s r o ti c a p a c c i m a r e c 0 0 - 1 1 1 7 4 - 6 2 2 1 1 c r 7 x , 3 0 6 0 , v 6 1 , k u 1 d ...

  • Page 34

    Diodes w m 0 5 3 , v 7 . 4 , 7 v 4 c 2 5 t z b e d o i d r e n e z 9 0 - 9 0 7 4 1 - 3 3 9 1 5 d , 8 1 5 d d501, d502, d503, d504, d505, d506, d507, d508, d509, d510, d511, d512, d513, d514, d516 33-40352-01 switch diode 1ss355te-17 0 1 - 5 2 3 0 5 - 3 3 0 0 5 d led(red/green dual color) Φ 3mm red&g...

  • Page 35

    K 2 1 . 4 r o t s i s e r p i h c 0 0 - 1 2 1 4 9 - 7 0 0 4 5 r Ω ,0603,1/10w,±1% r510, r511, r517, r531, r535, r569, r574 07-94702-00 chip resistor 47kΩ,0603,1/10w,±1%,rc0603fr- 0747kl r560, r562 07-91003-00 chip resistor 100kΩ,0603,1/10w,±1%,rc0603fr- 07100kl r512, r533, r516, r530 07-92203-00 chi...

  • Page 36

    C541, c549, c507, c511 26-10352-02 ceramic chip capacitor 1206, 10nf, 500v, x7r, ±10% c538, c547, c510, c513, c540, c543, c555 26-10621-12 ceramic chip capacitor 10uf, 25v, x5r, 1206, c3216x5r1e106kt c542, c550 26-33422-03 ceramic capacitor smd 330nk,250v,1210,x7t c3225x7t2e334kt000n c535, c546, c55...

  • Page 37

    W 0 7 v a b e d o i d d e e p s h g i h 0 0 - 0 7 0 0 4 - 3 3 2 1 d , 4 d d1, d2, d7, d8 33-40099-02 high speed diode bav99w-7-f d3, d11, d15, d19, d22, d24, d25, d26, d29 33-20316-01 high speed diode bas316 transistors 8 1 7 t m m f r o t s i s n a r t 1 0 - 8 1 7 0 0 - 1 3 1 1 t , 4 t 8 1 6 t m m ...

  • Page 38

    R o t s i s e r p i h c 0 0 - 0 0 7 2 9 - 7 0 2 8 r , 1 8 r 270Ω,0603,1/10w,±1%,rc0603fr- 07270rl r106, r109 07-93300-00 chip resistor 330Ω,0603,1/10w,±1%,rc0603fr- 07330rl r o t s i s e r p i h c 0 0 - 0 0 7 4 9 - 7 0 1 3 r , 1 1 r 470Ω,0603,1/10w,±1%,rc0603fr- 07470rl r69, r73, r83, r89 07-95600-0...

  • Page 39

    R61, r62, r78, r79 07-93603-01 chip resistor 360kΩ,0805,1/8w,±1% rc0805fr- 07360kl r o t s i s e r p i h c 2 2 - 8 0 8 6 9 - 7 0 2 2 r 6r8,1206, 0.5w,±1%,rc1206fr- 7w6r8l r114, r125, r126, r129 07-91002-02 chip resistor 10kΩ,1206,1/4w,±1%,rc1206fr- 0710kl r o t s i s e r p i h c 2 0 - 2 0 3 3 9 - 7 ...

  • Page 40

    3 9 t / b g g n ir p s r e h s a w 0 - 9 0 3 0 2 0 - 3 6 Φ 3 blue zinc plated 63-010305-2 washer gb/t848-2002, m3, black zinc plated, id=3.2mm,od=6mm 78-238001-0 insupad silpad silica gel,11x10x0.2mm,to126 78-015002-0 screw insulator m3 tw-5 misc and machanical parts 17-03001-16 binding post gold pl...

  • Page 41

    A16-32705-22 touch pcb vm1.1,vm1.1,fr- 4,1.6mm,2layers,1oz,tg130,50×15mm a16-32740-22 trigger/led/touch board assm vm1.1,fr- 4,1.6mm,2layers,1oz,tg130,110× 96mm ic 2 0 - 4 4 0 2 0 - 3 0 1 0 1 u four button capsense controller cy8cmbr2044-24lkxi resistor r o t s i s e r p i h c 0 0 - 1 6 5 0 9 - 7 0 ...

  • Page 42

    D a e b e ti r r e f p i h c 1 3 - 2 0 1 4 0 - 8 0 4 0 1 l 742792662, 1000ohm@100mhz,imax=600ma connectors t l p 4 - 2 b - 0 . 1 x j , p 4 c p f 0 . 1 h p d m s r o t c e n n o c c p f 4 0 - 4 0 0 1 2 - 3 1 8 0 1 n o c r o t c e n n o c c d i 5 0 - 8 0 0 2 2 - 3 1 7 0 1 n o c 2mmpitch,2*4pin,cnt-b20...

  • Page 43

    1 0 - 4 1 0 1 0 - 3 0 1 u self-supplied monolithic switcher ncp1014st65t3g resistors 6 2 - 6 0 8 1 9 - 7 0 9 6 r power metal strip chip resistor 0.018Ω,2512,2w,± 1%,wsl2512r0180fea18 r46, r47, r48 07-91209-00 chip resistor 12Ω,0603,1/10w,±1%, r10, r17, r29, r35, r40, r65, r74, r78, r121 07-91009-00 ...

  • Page 44

    C35, c36, c40, c45, c46, c53, c57, c61,c63, c68, c73, c74, c77, c78 26-10451-10 ceramic chip capacitor 100nk,50v,0603,x7r c47, c55, c56, c58, c60, c65 26-10511-20 ceramic chip capacitor 1uk,16v,0603,x7r,c1608x7r1c105k r o ti c a p a c p i h c c i m a r e c 0 0 - 1 2 4 2 2 - 6 2 1 7 c , 4 4 c 220nk,2...

  • Page 45

    T s j b c p m m 8 v m p 2 r e t c e n n o c 7 0 - 3 0 9 3 2 - 3 1 r o 1 j r e t c e n n o c 0 0 - 6 0 2 6 2 - 3 1 2 j 2x3p mv 6.2mm pcb jst,jst vl- series fuse v 0 5 2 / h a 2 1 t , p e x m . 2 1 0 5 1 2 0 e s u f 1 0 - 3 2 1 2 1 - 0 2 a 1 f e b u t g n i k n ir h s t a e h 1 - 0 6 0 0 0 0 - 8 7 a 1...

  • Page 46

    1 0 - 7 1 0 0 0 - 3 0 3 0 3 c i automatic x cap discharge ic cap017dg-tl so-8 cap017dg-tl n p 4 7 2 y n t c i r e ll o rt n o c r e w o p 0 0 - 4 7 2 0 0 - 3 0 1 0 3 c i resistors r o t s i s e r p i h c 1 0 - 9 0 0 1 9 - 7 0 1 0 3 r 10Ω,0805,1/10w,±1%,rc0805fr- 0710rl r o t s i s e r p i h c 1 0 - ...

  • Page 47

    Transforme r r e m r o f s n a r t 8 3 - 6 1 0 0 0 - 2 2 a 1 0 3 t hj-m22/m27-ee16,black tape connectors a11-01201-03 rocker switch 1552.3112 v 0 5 2 / l a 0 1 t , p x . 0 1 0 8 1 6 0 e s u f 0 0 - 3 0 1 2 1 - 0 2 a a17-07103-08 ac inlet chassis to ac inlet a14-26501-01 1pin cbale ul1672#18awg,l=100...

  • Page 48

    65-355012-0 logo clamp secc n5 t=1mm 67-375001-1 chassis secc-n5 t=1.2mm 65-375001-1 chassis secc-n5 t=1.2mm 67-375002-0b rear panel secc-n5 t=1.0mm 80-375002-0 rear panel secc-n5 t=1.0mm 65-375002-0 rear panel secc-n5 t=1.0mm 67-375012-0a rear panel secc-n5 t=1.0mm 80-375002-0 rear panel secc-n5 t=...

  • Page 49

    M m 5 1 x 2 6 1 m a o f a v e m a o f a v e 0 - 2 1 0 8 5 1 - 9 7 ， t=1mm 79-375002-0 led board foam eva,black,50x52mm,t=1mm packing 88-375001-0a carton box 547*495*219mm n88-375003-1 paper corner 50*50*5mm,l=197mm 89-355901-0 cushions assy 88-355005-0a paper formed box 88-355006-0 cushion first lay...

  • Page 50

    86-004030-0 copperplate label 40×30mm,base color:pantone cool gray 6c 94-054002-0 grouding label φ 10 50

  • Page 51

    Ref.N0 part no. Description qty. Ref.N0 part no. Description qty. A001 01-62202-00 amp board 2 a010 78-015002-0 screw insulator m3 4 a002 01-62203-00 nc400 oem board 2 a011 70-375005-1 l heatsink right 1 a003 70-375006-1 l heatsink left 1 a004 70-375004-0 main heatsink 2 a005 67-375004-0 rca bracket...

  • Page 52

    Ref.N0 part no. Description qty. 1 88-375004-0a shipping box 1 2 88-375001-0a carton box 1 3 89-355901-0 cushions assy 2 4 88-375003-1 paper corner 4 5 00-62200-10 m22 unit (ah version) 1 00-62200-20 m22 unit (c version) 1 6 90-355002-1 woven bag 1 7 88-355003-0a accessory box 2 8 88-267002-0 access...

  • Page 53

    Ref.N0 part no. Description qty. P001 01-62207-10 smps board (ah) ah:1 01-62207-20 smps board ( c) c:1 p002 70-355003-0 plate heatsink 1 p003 70-355002-0 connection heatsink 1 p004 66-355001-0 heatsink spring clip 10 p005 85-138103-0 nylon spacer 2 p006 85-138102-0 nylon spacer 2 p007 85-355001-0 th...

  • Page 54

    S019 s020 t00 1 t00 2 t00 3 r001 r002 r003 f00 1 f00 2 f00 3 f00 4 f00 5 f00 7 f00 6 f01 0 f00 8 f00 9 f01 1 c001 c002 c003 c004 c004 c005 c006 c007 c008 c009 c010 c011 c012 c013 c014 c007 c008 c009 r004 r005 r004 r005 r006 r00 7 r008 s001 s001 s002 s002 s003 s003 s004 s004 s004 s004 s005 s005 s006 ...

  • Page 55

    Ref.No part no. Description qty. Ref.No part no. Description qty. C001 67-375001-1 chassis 1 r002 a11-01201-03 rocker switch 1 1 t e l n i c a 8 0 - 3 0 1 7 0 - 7 1 a 3 0 0 r 1 l e n a p e d i s t f e l 0 - 2 0 0 5 7 3 - 0 7 2 0 0 c 2 t s o p g n i d n i b 6 1 - 1 0 0 3 0 - 7 1 4 0 0 r 1 l e n a p e...