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NAD Masters M3 Service Manual

Other manuals for Masters M3: Owner's Manual, Specification Sheet, Owner's Manual
Manual is about: Dual Mono Integrated Amplifier

Summary of Masters M3

  • Page 1

    Ser vice m anual ser vice m anual m3 c/ah mode l: m 3 se r vice manual © nad 2006 nad electronics international toronto m3 c/ah integrated amplifier m3 c/ah integrated amplifier integrated amplifier.

  • Page 2

    Contents section 1 . . . .Summary section 2 . . . .Cabinet & main chassis section 3 . . . .Electrical section 4 . . . .Replacement parts list.

  • Page 3

    Section 1 summary contents product safety servicing guidelines for audio products ............. 1-2 servicing precautions ........................................................................... 1-3 • general servicing precautions • insulation checking prodedure • electrostatically sensitive devi...

  • Page 4

    1-2 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 w...

  • Page 5

    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 6

    321 123 alignment procedure a. Power driven voltage(psu board) connect a dc millivoltmeter to tp601/tp701 1 and 2 pin, then adjust vr601/vr701(6.8kohms) for 0v±0.1v. B. Idling current(amp board) 1.Connect a dc millivoltmeter betweentp301 2 pins, then adjust vr301 (200ohms) for 7-8mv reading on meter...

  • Page 7

    C. Balance inputs cmrr 1.Volum set 0db, input 2v/10khz common mode sinwave signal at l channel balance input,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 millivoltm...

  • Page 8: Power Amplifier Section

    Power amplifier section continuous output power into 4/8 ohms 180w (17dbw) (minimum rms power per channel, both channels driven, with no more than the rated distortion) rated distortion (thd)(20hz –20khz) İ0.004% channel separation ı100db (main in, 60w out at 8 Ÿ,1kŸ shorted, 1khz) clipping power, 1...

  • Page 9

    Signal-to-noise ratio 110db ref 500mv (a-weighted, line in, pre-out) rated distortion (thd)(20hz –21khz) İ0.005% channel separation ı110db (1khz 2v line/balanced in, 2v pre-out) input sensitivity 320mv for 2v out input overload line input balanced input ı10v frequency response(5hz-70khz) +/-0.3db th...

  • Page 10

    2-1 section 2 cabinet & main chassis contents exploded views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 2 1. Cabinet and main frame section . . . . . . . . . . . . . . . . . ....

  • Page 11

    S023 pr10 pr07 pr08 pr09 pr11 pr12 s024 s015 s001 s020 c001 c002 c003 f001 f002 f003 f004 f005 f007 f008 f009 f010 f011 f012 c021 c004 c005 c006 c007 c010 c011 c012 c014 c015 c016 c015 c017 c013 r001 r002 r004 r006 r008 r007 r003 r005 c018 c019 c020 a001 a002 c022 c026 c009 c025 c008 pr01 pr02 pr03 ...

  • Page 12

    P006 p005 p001 p002 p003 p004 p008 p007 p011 p009 p013 p016 p015 p014 p012 p010 2. Packing accessory section 2-3.

  • Page 13

    Ref.No part no. Description qty. Ref.No part no. Description qty. C001 l e n a p r a e r 1 - 4 0 0 8 4 0 - 7 6 1 s i s s a h c 2 - 2 0 0 8 4 0 - 7 6 ˄c˅ 1 c002 l e n a p r a e r 2 - 4 1 0 8 4 0 - 7 6 4 k n i s t a e h 0 - 1 0 0 8 4 0 - 0 7 ˄ah˅ 1 c003 01-50306-02 ramp board assy 1 67-048024-0 rear p...

  • Page 14

    Ref.No part no. Description qty. Ref.No part no. Description qty. S011 61-023212-0 screws, btb3×12 2 s012 62-050302-0 pem nut-pcb m3×0.5 16 s013 61-223506-1 hex screws w/tooth washer 24 s014 61-223514-0 hex screws 3×14 16 s015 61-023106-0 screws, stb3×6 4 s016 61-373506-0 machine screws m3×6 14 s017...

  • Page 15

    Section 3 electrical contents electricaltroubleshooting guide 1. Power check flow 2. Preamp operation flow details and waveforms on system test and debugging 1. System 11mhz clock 2. At89c51 reset signal 3. Volume control data and clock 4. Rec(zone) select data and clock 5. Input select data and clo...

  • Page 16

    1.Power check flow power switch on amber led on? No check s1 and its cable check f901 check the standby transformer check ic1 on the standby board yes hear the relay’s click? No check the mcu on the keyboard check q91 q92 and op91 check if the main transformers has been plugged in yes +/-70v un-regu...

  • Page 17

    No yes 12v on the preamp relayis correct? No check q990 q991 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 q612 q613 3-3.

  • Page 18

    2.Preamp operation flow power on amber led change to blue? No check fpp board yes hear the relay’s click? No check 24v relay suply check u113,u108,u213,u208 check hclk,hdata,func signal yes relay respond properly? No yes wate for 10 second press listen,mode,biamp key to change input and out put mode...

  • Page 19

    No yes b response change properly? Check u112,±17v at tone board check tone_stb,opsel_data opsel_clk signal the end press tone key to change tone setting,measure preout response yes level=2v±0.1v thd no check u109 u209 u111 u211 check opsel_stb signal press z-2/record key to current input channel th...

  • Page 20

    Details and waveforms on system test and debugging 1. System 11mhz clock ),* 2. At89c51 reset is high active. ),* 3-6.

  • Page 21

    3.Volume control data and clock 4.Rec(zone) select data and clock 3-7.

  • Page 22

    5.Input select data and clock 3-8.

  • Page 23: Block Diagrams

    Ac inlet emi filter standby relay power switch fuse f901 fuse f903 100ma 250v ah: 5a 250v c: 3.15a 350v fuse f902 ah: 5a 250v c: 3.15a 350v r-core r channel standby main transformer l channel main transformer transformer 5v regulator 12v rectify b901 ic1 b902 logic circuit mcu on preamp logic circui...

  • Page 24

    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 biamp high pass filter 2,2.5,3,3.5db selectable gain amp stage 30db attenuator 10db/step by pass, 40, 60, 80, 100hz pre out1 pre out2 input selec...

  • Page 25

    P0.0 p0.1 p0.2 p0.3 p0.4 p0.5 p0.6 p0.7 p1.0 p1.1 p1.2 p1.3 p1.4 p1.5 p1.6 p1.7 p2.0 p2.1 p2.2 p2.3 p2.4 p2.5 p2.6 p2.7 p3.0 p3.1 p3.2 p3.3 p3.4 p3.5 p3.6 p3.7 vfd encode keys eeprom u83 max3221 (fpp) rj45 rs232 socket (rear panel) q85 q86 (fpp) ir in/out socket ( rear panel) q89 inverter(fpp) prote...

  • Page 26

    C407 33p/250v c402 1n c405 33p/250v c425 470pf r402 22k r403 100 r412 100 r404 100 r413 27k r405 27k r414 100 r406 100 q413 2sa1837 q410 2sa1360 q409 2sa1015 q405 2sa1015 q407 2sa970 q406 2sa970 q401 2sa970 q411 2sa3423 q412 2sc1815 q408 2sc1815 q404 2sc2240 q403 2sc2240 q402 2sc2240 r408 33 r420 33...

  • Page 27

    R103 220r r105 220r c102 100p c103 100p r107 220r r109 220r r111 220r c104 100p c105 100p c106 100p r12 1m r104 1m r106 1m r108 1m r110 1m lrca2 input2 lrca3 input3 lrca4 input4 lrca5 input5 lrca6 input6 r203 220r r205 220r c202 100p c203 100p r207 220r r209 220r r211 220r c204 100p c205 100p c206 1...

  • Page 28

    1 2 jp901 230v 1 2 jp902 120v 1 2 3 4 b901 df1501s 1 2 3 4 b902 df1501s c903 2200uf/16v c904 1000uf/25v c905 0.1uf/50v c906 0.1uf/50v c902 0.1uf/50v c901 0.1uf/50v c907 100uf/10v c908 0.1uf/50v 1 2 3 4 cz904 4pin 1 2 jp903 120v 1 2 jp904 230v 1 2 jp905 120v 1 2 3 4 cz903 cz903 1 2 3 4 5 cz906 con5 1...

  • Page 29

    +24vl -24vl 5v -24vr +24vr 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 cz94 from pre_sch cz201 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 cz97 from psu_sch cz73 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 cz92 from psu_sch cz75 +24vr -24vr +24vl -24vl 1 2 3 4 5 6 7 8 9 10 11 12 13 14...

  • Page 30

    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 cz82 to psu_sch cz72 s817 1standby s814 2listen s818 4mono s815 5mode s819 7speaker s816 8volume r8 1 9 1 0 k r8 1 8 1 0 k r8 1 7 1 0 k +5v vd1 vd2 vd3 vd4 vd5 vd6 vd7 vd8 vss 3 gnd 2 signal 1 u82 hs0038b4 q85 2sc1815 q...

  • Page 31

    R525 75 r530 2k2 r534 1k r516 120k r54 10 r558 4k7 r548 10k r550 2k21 r559 2k2 r524 75 r55 10 r532 1k r521 1meg r562 49.9 r540 2k21 1% r566 470 r551 2k21 1% r542 100 r543 100 r546 4k7 r528 1k r570 160 r554 3k r567 470 r556 4k7 r517 120k r520 1meg c530 47p c524 33p c534 10uf c526 33p c510 220n c517 1...

  • Page 32

    7.Power board 3-18 d716 1n4148 r756 100k r758 62k r767 100k 6 7 8 4 ic705a tl082bd r764 9k1 r765 15k r769 9k1 r770 15k r766 10 r771 10 q720 2sc1815 q721 2sa1015 +20vr c764 10u/50v c769 10u/50v -20vr c767 1uf/50v r755 220k ic705b tl082bd r752 18k r743 47k c761 10uf/50v c762 1uf/50v r759 10k d715 1n41...

  • Page 33

    Printed circuit diagrams 1. Preamp main board(prem) t oplayer bottomlayer 3-19 r20 2 c20 3 c20 5 c20 6 c237 1c 59 q231 1r551r56 q230 c235 rrca7 2c49 r289 rr c a 9 rrca8 2c60 rrca6 rrca10 5 a c r r 4 a c r r rrca1 rrca2 c220 rrca3 1q17 1q18 q103 rl211 2d11 2c21 2r21 2d04 2c07 2r07 u209 j2 08 1d21 r20...

  • Page 34

    Bottom layer 2. Preamp lch input board(prel) 3. Preamp tone control board(pret) top layer bottom layer 1q24 u106 1c50 r188 1r17 1c17 1d09 1r16 1c16 1q08 1r15 1c15 1d08 1r20 1c20 1q10 rl 10 9 1c19 1r19 1d10 1r66 1c56 1q25 1r65 1c57 1d16 1c 60 j110 u111 1c 49 1r62 r190 c135 lr c a 9 j108l c133 1d 15 1...

  • Page 35

    4. Power supply board(psu) m3 psu vm1.0 2005 c coypright nad electronic ic7 0 4 d710 c74 1 cz74 ic 6 0 3 q60 9 hea t s ink hea t s ink q610 d609 r7 36 r7 12 r7 13 r7 59 r7 54 r7 04 r7 07 r7 05 r7 09 r7 15 r7 14 cb704 heatsink d702 r7 0 6 r7 03 r7 0 8 q708 cz73 d704 b704 c717 d70 1 r710 r701 c718 c72...

  • Page 36

    5. Balance amplifier board(bal) 3-22 m3 balance vm1.0 q523 2004 c coypright nad electronic r560 q518 -24vl r52 q55 c5 0 1 c5 0 4 q56 c5 3 6 hs4-m3-b008 bal vm1.0_pcb jirb2 c5 1 r5 1 jirb1 u52 c52 r511 input1 r580 r516r518 r581 c59 r54 c513c515 r520r522 input2 r514 r526 c511 r56 jira1 d519 r517 r512 ...

  • Page 37

    6. Connect board(con) 7. Encoder board(enc) 8. Speaker board(l/r spk) m3 c o nn ec ter vm 1 .0 f o r rev cz 9 4 cz 9 7 cz 9 3 cz 9 2 r9 9 0 c9 9 1 q9 90 d9 9 0 c9 9 0 d991 q9 9 1 c9 9 4 r9 9 1 c9 9 3 h s 4-m3-b008 enc v m1. 0 _ p cb er1 ec4 ec1 er2 ec2 ecz1 er4 ec5 es1 er3 ec 3 hs4-m3-b007 lspk vm1....

  • Page 38

    9. Front pannel board(fpp) r853 r850 c833 c834 c817 s8 1 7 c813 c8 2 7 c8 3 0 c829 r8 4 1 r8 4 2 c8 2 8 u83 c831 c8 1 5 cz 8 1 s8 1 9 s8 1 6 r8 1 7 r8 1 9 r8 1 8 q89 r8 1 5 r816 cz 8 2 s81 8 r8 4 0 s81 5 s81 2 r8 3 8 s8 1 4 s81 1 ze ro r ze ro l voll c l k voll st b vol r c l k r8 3 7 volr d a t a j...

  • Page 39

    10. Standby board bottom(stbb) cz902 c90 4 cz908 c903 con4 nad m 3 st bb board v m 1 .0 c c oypright nad elect r onic s c908 ic1 c9 07 c906 b902 c902 c905 b901 c901 top layer bottom layer 3-25.

  • Page 40

    11. Standby board top(stbt) top layer bottom layer 3-26 rechangede cautio n: meme type et calibre ! For continue dp ro tecti on agains t ri skof fir e repl aceo nly wit hsa me attention: utilis erun fusi blede 120vt 5al /2 50 v 230 v t 3.1 5al /25 0v nadm 3s tb tboard vm1.0 c co ypright nade lectr o...

  • Page 41

    12. L channel amplifier pcb (ampl) top layer bottom layer 3-27 r325 r350 r324 d304 r307 q3 0 8 c3 0 1 r3 2 8 r353 d301 r3 a 6 ic305 c32 0 r397 tp 3 0 1 q3 3 7 r347 r345 r346 r358 r352 d32 2 d32 4 q328 d3 4 0 r3a1 r3b 6 r38 5 r34 8 r3b 1 q3 2 1 r337 c317 c3 1 6 r38 0 q314 r3 3 8 q3 3 8 r390 r3 4 1 r3...

  • Page 42

    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...

  • Page 43

    14. Preamp module board(mod) top layer bottom layer 3-29 m3pr eampmo dulev m1.0 up mq107 down md101 md 106 md101 md 106 mc112 mr 101 mr 111 mc 110 mc 108 mr 108 mc 105 mq106 mq108 mr 112 mr 113 mq109 mq101 mq110 mq 112 mq111 mr 110 mc 107 mr 109 mr 117 mc 106 mq103 mq101mq 111 mc 109 mr 118 mq115 mq...

  • Page 44

    L cp y t q t n i r p t o o f r o t a n g i s e d e p y t t r a p n o i t p i r c s e d n / p 0 c version p/n 00-50300-20 ah version p/n 00-50300-10 ch version p/n ˖00-50300-30 .1 p/n:01-50301-00 balance board diode ..2 33-44148-11 switch diode smd ll4148 d52, d53, d54, d55, d56, d57, d58, d59, d510,...

  • Page 45

    L cp p/n description part type designator footprint qty ..2 17-02001-04 3.5phone jack1 st-323b-04/ckx-3.5-02-3p pj1, jira1, jirb1, jirb2 phone1 4 ..2 or17-02001-03 3.5phone jack1 scj349p00×s0b01 pj1, jira1, jirb1, jirb2 phone1 4 pcb ..2 16-53001-00 multi pcb fr-4, 1.6mm, 200mm×80mm 1 …3 16-53010-00 ...

  • Page 46

    L cp p/n description part type designator footprint qty encode ..2 37-16243-00 encode ec16b243040f es1 encode 1 capacitors ..2 26-10451-01 ceramic chip capacitor 0.1uf, 50v, +80%-20% ec1, ec2, ec3, ec4, ec5, 0805 5 resistors ..2 07-90221-01 chip resistor 220 ȍ, 1/8w, ±5% er2, er3 0805 2 ..2 07-90103...

  • Page 47

    L cp p/n description part type designator footprint qty .1 p/n:01-50306-01 lamp board diode ..2 33-44148-03 switch diode 1n4148 d303, d304, d305, d306, d323, d325, d317, d318, d320, d321 pitch=10mm 10 ..2 33-44148-02 switch diode 1n4148 d311, d312, d313, d314, d315, d326, d340 pittch=7.5mm 7 ..2 33-...

  • Page 48

    L cp p/n description part type designator footprint qty ..2 07-20180-60 metal film resistor 18 ȍ, 0.6w, ±5% r337, r329 pitch=10mm 2 ..2 07-22109-10 metal film resistor 21 ȍ, 1/4w, ±1% r317 pitch=10mm 1 ..2 07-20330-10 metal film resistor 33 ȍ, 1/4w, ±5% r308, r320 pitch=10mm 2 ..2 07-20820-10 metal ...

  • Page 49

    L cp p/n description part type designator footprint qty ..2 33-44148-02 switch diode 1n4148 d411, d414, d415, d426, d440 pitch=7.5mm 5 ..2 33-44148-03 switch diode 1n4148 d403, d404, d405, d406, d412, d413, d417, d418, d420, d421, d423, d425 pitch=10mm 12 ..2 33-40021-03 switch diode bav21 d407, d40...

  • Page 50

    L cp p/n description part type designator footprint qty ..2 07-20301-10 metal film resistor 300 ȍ, 1/4w, ±5% r428 pitch=10mm 1 ..2 07-20471-10 metal film resistor 470 ȍ, 1/4w, ±5% r401 pitch=10mm 1 ..2 07-20681-10 metal film resistor 680 ȍ, 1/4w, ±5% r453 pitch=10mm 1 ..2 07-20102-10 metal film resi...

  • Page 51

    L cp p/n description part type designator footprint qty ..2 33-16809-01 zener diode 6.8v, 1/2w d614, d714 pitch=10mm 2 ..2 33-25404-03 rectifier diode 1n5404 d604, d704 pitch=17.5mm 2 …3 33-25404-00 rectifier diode 1n5404, taping d604, d704 do-27 2 ..2 33-60116-00 thyristor bt151-500r d602, d603, d7...

  • Page 52

    L cp p/n description part type designator footprint qty ..2 07-26202-10 metal film resistor 62k ȍ, 1/4w, ±1% r658, r758 pitch=10mm 2 ..2 07-20104-10 metal film resistor 100k ȍ, 1/4w, ±5% r656, r756 pitch=10mm 2 ..2 07-20154-10 metal film resistor 150k ȍ, 1/4w, ±5% r667, r767 pitch=10mm 2 ..2 07-2022...

  • Page 53

    L cp p/n description part type designator footprint qty ..2 85-008001-1 spacer support pmb-1 1 ..2 61-023208-0 self taping screws btb3×8, pcb interval(1) 1 .1 p/n:01-50309-00 prem board diode ..2 33-44148-11 switch diode smd ll4148 1d12, 1d13, 1d14, 2d12, 2d13, 2d14, 2d01, 2d02, 2d03, 2d04, 2d05, 2d...

  • Page 54

    L cp p/n description part type designator footprint qty ..2 07-91509-01 chip resistor 15 ȍ, ±1% r131, r231 0805 2 ..2 07-91879-01 chip resistor 18.7 ȍ, ±1% r130, r230 0805 2 ..2 07-92329-01 chip resistor 23.2 ȍ, ±1% r229, r129 0805 2 ..2 07-92749-01 chip resistor 27.4 ȍ, ±1% r1002, r2002 0805 2 ..2 ...

  • Page 55

    L cp p/n description part type designator footprint qty ..2 69-048028-0 pre-busbar r pre-busbar r, 0.1u gold plated h207 bus bard 1 pcb ..2 16-53009-00 premain board fr-4, 1.6mm, 150mm×240mm 1 …3 16-53020-00 pcb fr-4, 1.6mm, 220mm×250mm 1/2 ..2 01-50310-00 line/drive amp preamp module u101, u201 2 …...

  • Page 56

    L cp p/n description part type designator footprint qty resistor ..2 07-91009-01 chip resistor 10 ȍ, ±1% 1r51, 1r52 0805 2 ..2 07-91509-01 chip resistor 15 ȍ, ±1% 2r106, 1r106 0805 2 ..2 07-94879-01 chip resistor 48.7 ȍ, ±1% r156, r256 0805 2 ..2 07-95369-01 chip resistor 53.6 ȍ, ±1% r168, r268 0805...

  • Page 57

    L cp p/n description part type designator footprint qty ..2 25-22461-02 metallized polyester film capacitor 220nf, 63v, ±5% 1c60 pitch=5mm 1 resistor ..2 07-90000-01 chip resistor 0 ȍ, ±5% 1r73 0805 1 ..2 07-92000-01 chip resistor 200 ȍ, ±1% 1r61,1r62, r189, r193 0805 4 ..2 07-92200-01 chip resistor...

  • Page 58

    L cp p/n description part type designator footprint qty ….4 81-046006-0 secc secc-n4 396×1219×1.6 1/8 .1 68-048001-1 hs fixl bar c45, hrc45, 4 .1 66-005009-0 tr. Clamping 16 .1 66-018005-0 tem. Sw clamper 65mn hrc48-52, 2 .1 66-001008-0 metal disc 2 .1 68-048002-0 shielding box 2 .1 70-048010-1 m3 f...

  • Page 59

    L cp p/n description part type designator footprint qty .1 s88-048001-0 shipping box 635×625×320mm 1 .1 s88-048002-0 gift box 615×605×290mm 1 .1 89-048001-0 m3polyfoam-bottom epe, white,30g 1 .1 89-048002-0 m3polyfoam-cap epe, white,30g 1 .1 89-048003-0 m3 little polyfoam a epe, white,28-30g 1 .1 89...