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NAD 375BEE AH Service Manual

Manual is about: Stereo Integrated Amplifier

Summary of 375BEE AH

  • Page 1

    La u na m e ci vr es la u na m e ci vr es c375bee c/ah $%, / - #"%% , ! 5 . ! - % #) 6 2% 3 © nad 2010 nad electronics international toronto c375bee h a/ c stereo integrated amplifier c375bee h a/ c stereo integrated amplifier stereo integrated amplifier.

  • Page 2

    Contents front panel/rear panel view 3 specifications 4 alignment procedure/alignment points 5-7 wiring diagram 8 schematic diagram 9-18 pcb layout 19-27 electrical parts list 28-48 exploded view 49 exploded view parts list 50 packing diagram 51 version history. . . . . . . . . . . . . . . . . . . ....

  • Page 3

    '30/51"/&-3&"31"/&-7*&8 45"/%#: 45"/%#: -&% #3*%(& .0%& */%*$"503 40'5 $-*11*/( */%*$"503 .140$,&5 3&.05&4&/403 1)0/&4 41&",&34 " # */1654&-&$5034 50/& %&'&"5 50/& $0/530-4 #"-"/$& 70-6.& .1joqvu $% */165 56/&3 */165 %*4$ */165 "69 */165 5"1&*/065 5"1& .0/*503 */065 0qujpobmqipop module 11 non-servi...

  • Page 4

    Preamplifiers section thd(2v in 2v out,ccif imd,dim 100) signal/noise ihf re 500mv output a wtd. > 102 db s/n re 2v output, max volume > 110 db s/n re 100mv o/p (unity gain) > 92 db channel separation 1khz > 80 db 10khz > 70 db input impedance 100kohms+320pf max input, 0.1% thd > 8 v rms output impe...

  • Page 5

    A. Dc offset voltage the dc offset between offset test point and agnd must be within 0+/-20mv. B. Idling current the idling current in the output stage of the poweramp should be set to 30ma+/-5ma per pnp-npn transistor pair (this means the mid point voltage is 6.6mv with down limit of 5.5mv and up l...

  • Page 6

    - 6 - alignment procedure.

  • Page 7

    ! # - 7 - alignment procedure.

  • Page 8

    P300 l e f t p o w e ramp bo ard rig ht p o w e ramp bo ard to p 201b pad6 pad5 pad2 pad3 pad4 pad1 p401 p402 from pad1-6 fr o m p 203a fr o m p 211a fr o m p 209a to le ft p 101b to le ft p 103b to p901b to l&r p102b from p504a fr o m p 503a to p 205b to p 302b fr o m p 501a to p402b from p502a fro...

  • Page 9

    Isc biridge scn/mute gnd out in protect fb tp2 scp o/p -15v vcc +80v vss vcc -80v +15v -15v -15v vcc +15v +15v -15v +15v +80v -80v 1 1 1 /5w /5w /5w /5w t o m ai n bo ard /1% /1kv /100v /1w /1/4w /100v /1w/1% /1w/1% /1w/1% /1% /1/2w /1% /1w/1% dc servo /100v /3w /1w /1% /1kv t o m ai n bo ard all po...

  • Page 10

    Tuner aux disc cd t ape2 mu t e t ape1 cd t une r v ide o au x dis c ip o d video ipod tape2 tape1 r1out dgnd t1out t1out r1out l out r out l in r in -26v +26v +12vd +12vd +5vd +12vd -26v +26v sp a mute sp b prot scled ir in bridge ir out mm/mc extra phono l phono r phono en t1out r1out /1kv /1kv /1...

  • Page 11

    Vcc isc br l scn/mute protect l scp isc relay scn/mute protect r scp l o/p r o/p sp b sp a vss br r +26v -80v +80v +15v +80v -80v +15v -15v +80v -80v +15v -15v vcc vss -15v -26v -26v +36v +26v +36v +36v +12vd +26v +36v +5vd +26v +5vd +18v +18v -26v scled mute ir out sp b sp a bridge prot mm/mc phono...

  • Page 12

    Vol- vol+ tone bridge ir in ir out +26v -26v +5.6v +5.6v +26v +26v -26v /1% /16v /1% /1% /1% /5% /5% /5% /5% /1% /1% tone defeat relay all polyester capacitors are 63v 5% unless noted. All elec. Capacitors are 50v 20% unless noted. All resistor are 1/6w 5% rj13 unless noted. Bal ance v o l um e co n...

  • Page 13

    Thermal prot stby dgnd +5.6v +12v agnd +5.6vd +5.6vd /1w all polyester capacitors are 63v 5% unless noted. All elec. Capacitors are 50v 20% unless noted. All resistor are 1/6w 5% rj13 unless noted. All zener diode are 1/2w unless noted. W403 only for c version w401&w402 only for ah version neutral l...

  • Page 14

    Mp r p0 .6 au x cd p0 .2 p2 .1 t ape2 p2 .0 t ape1 p0 .5 t une r p2 .2 di s c p0 .3 p0 .4 txd +5vd dgnd t1out r1in rxd scl sda rst vol- vol+ p1.2 p1.3 scl sda rst rxd txd ir out ir in p3.6 p3.7 ir out bridge vol- ir in p2.0 p2.1 p2.2 /ea p0.7 p0.6 p0.5 p0.4 p0.3 p0.2 p0.1 p0.0 +5vd p2.3 p2.7 p2.6 p2...

  • Page 15

    Lo ut lin- lin+ ro ut rin+ rin- g ndr g ndl +26v -26v all capacitors are smd0805 5% unless noted. All resistor are smd0805 1/10w 5% unless noted. /1% /1% /1% /1% /1% line in module c611 is 39pf m201 01-37506-10 line out module c611 is 47p f m301 01-37506-20 q604 2sa1312 q604 2sa1312 r613 18k r613 18...

  • Page 16

    T o main bo ard p 403b p702b 3pin2.54-c p702b 3pin2.54-c 1 2 3 r701 100 r701 100 j701 db9 female j701 db9 female 5 9 4 8 3 7 2 6 1 p701 3pin2.54-a100b p701 3pin2.54-a100b 2 3 1 - 16 - schematics diagram.

  • Page 17

    P801a 3pin2.54-a170b p801a 3pin2.54-a170b 2 3 1 j801 phone jack j801 phone jack - 17 - schematics diagram.

  • Page 18

    S p e ake r a s p e ake r b p901b 6pin3.96-c p901b 6pin3.96-c 1 2 3 4 5 6 bp901b bindg post 3 4 bp901a binding post 2 1 bp901d binding post 7 8 bp901c binding post 6 5 - 18 - schematics diagram.

  • Page 19

    Q14 2 q14 6 q10 1 q10 9 q14 3 q14 0 q13 9 q14 1 q14 5 q14 4 q15 2 c37 5p owe ra mp vm 1.0 2008-09- 23 r138 r106 r132 c375bee/c275bee poweramp board vm1.0 oct. 22. 2008 q 105 q114 r 125 d117 d115 d114 d119 d125 d118 r1f4 c375bee/c275bee amp board - solder side r1f7 q 151 r1f5 c375bee/c275bee amp boar...

  • Page 20

    B u s 2 0 1 p203a c375bee main board vm1.0 c232 r 267 rv201 q2 06 hs 2 0 5 h s204 hs 2 0 3 r l 201 c 203 br204 d221 r261 d 226 d 222 r 2e5 c277 ir o ut d 223 d 225 c278 c2 7 6 ir in c2 4 0 p207b p202b agn d r2e6 b ridg e -26v + 26v d 2 27 d 224 r in r 2a1 l i n agn d r o ut l ou t c 239 l o w ra il ...

  • Page 21

    R304 r334 r303 r333 w 301 c 308 r3 1 0 ir out c375bee tone board - solder side ir in c306 c307 c375bee tone board - component side rv302 rv304 c317 ag n d rv301 r 329 c 324 r317 r l301 r 306 r 308 c 313 r 311 c 314 d 301 c 311 r 319 r 315 r305 r307 rv305 c 305 c309 c312 rv306 r 320 r314 c 320 r312 c...

  • Page 22

    C401 replace only with same type c375bee/275bee standby board - solder side attention: protection against risk of fire utiliser un fusible de rechange de meme type fuse and rating c375bee/275bee standby board vm1.0 oct. 28. 2008 c375bee/275bee standby board - component side d4 0 5 h s 401 c410 for c...

  • Page 23

    Q538 d536 c375bee dis pla y boar d vm1.0 oc t. 25. 2008 d523 q544 q54 2 d544 d531 q 502 r510 q551 c514 r551 c515 d 517 d 518 c509 c516 p502a d501 r 527 q 534 r 549 r502 r 547 q 533 r 524 c 510 r 523 r546 r548 q52 5 c 513 r 507 d 534 r 568 r 569 r 504 r 503 r 501 r571 q543 q530 r 531 r526 r54 1 q541 ...

  • Page 24

    C375bee/c275bee opamp board - solder side q610 c375bee/c275bee opamp board - component side q609 vp1. 0 oct .10. 2008 31 q611 p6 0 1 a c375bee/ c275bee op a m p q612 - 24 - pcb layout (only replace line in or line out modules, do not repair) line in module c611 is 39pf m201 01-37506-10 line out modu...

  • Page 25

    C3 75 r s232 bo ard vm1.0 o ct. 28 . 20 08 c375 rs232 board 6 1 j 701 r701 5 9 p701a - 25 - pcb layout.

  • Page 26

    L j801 r c375bee headphone board p801a - 26 - pcb layout.

  • Page 27

    C375bee/c275bee binding post board - component side c375bee/c275bee binding post board - solder side c375bee/c275bee binding post board vm1.0 oct. 22. 08 p901b - 27 - pcb layout.

  • Page 28

    Designator description part type part number footprint p/n 01-37501-00 pcb1 board (poweramp module) diode d101 switch diode 1n4148 33-44148-00 dax/.300x.080/.031 d102 switch diode 1n4148 33-44148-00 dax/.300x.080/.031 d103 switch diode 1n4148 33-44148-00 dax/.300x.080/.031 d104 switch diode 1n4148 3...

  • Page 29

    Designator description part type part number footprint q133 transistor ksc2690aystu 31-02690-00 to126/90/ecb q135 transistor ksc2690aystu 31-02690-00 to126/90/ecb q136 transistor ksc2690aystu 31-02690-00 to126/90/ecb q137 transistor ksa1220aystu 31-01220-00 to126/90/ecb q138 transistor ksa1220aystu ...

  • Page 30

    Designator description part type part number footprint r127 metal film resistor 10Ω, 1/6w, 5% 07-20100-50 ax/.200x.080/.031 r128 metal film resistor 10Ω, 1/6w, 5% 07-20100-50 ax/.200x.080/.031 r129 metal film resistor 10Ω, 1/6w, 5% 07-20100-50 ax/.200x.080/.031 r130 metal film resistor 1kΩ, 1w, ±1% ...

  • Page 31

    Designator description part type part number footprint r184 metal film resistor 470Ω, 1/6w, 5% 07-20471-50 ax/.200x.080/.031 r185 metal film resistor 47kΩ, 1/6w, 5% 07-20473-50 ax/.200x.080/.031 r186 metal film resistor 22kΩ, 1/6w, 5% 07-20223-50 ax/.200x.080/.031 r187 metal film resistor 2k2Ω, 1/6w...

  • Page 32

    Designator description part type part number footprint c102 polyester capacitor 100nf, ±5%, 250v 25-10422-01 rad/cap/.300x.150/ls.200/.031 c103 alu electrolytic capacitor 10uf/50v, ±20%, 105 06-10051-01 cpcyl1/d.200/ls.200/.031 c104 ceramic capacitor 33pf, ±5%, 1kv 05-33013-02 cpax/.200x.100/.031 c1...

  • Page 33

    Designator description part type part number footprint c147 alu electrolytic capacitor 10uf/50v, ±20%, 105 06-10051-01 cpcyl1/d.200/ls.200/.031 c148 polyester capacitor 470nf, ±5%, 63v 25-47461-00 rad/.300x.150/ls.200/.031 c149 polyester capacitor 470nf, ±5%, 63v 25-47461-00 rad/.300x.150/ls.200/.03...

  • Page 34

    Designator description part type part number footprint d227 rectify diodes 1n4007 33-24007-00 dax/.400x.100/.039 d228 switch diode 1n4148 33-44148-00 dax/.300x.080/.031 d230 switch diode 1n4148 33-44148-00 dax/.300x.080/.031 d231 switch diode 1n4148 33-44148-00 dax/.300x.080/.031 th201 thyristor bt1...

  • Page 35

    Designator description part type part number footprint r215 metal film resistor 220Ω, 1/6w, 5% 07-20221-50 ax/.200x.080/.031 r216 metal film resistor 220Ω, 1/6w, 5% 07-20221-50 ax/.200x.080/.031 r217 metal film resistor 220Ω, 1/6w, 5% 07-20221-50 ax/.200x.080/.031 r218 metal film resistor 220Ω, 1/6w...

  • Page 36

    Designator description part type part number footprint r271 metal film resistor 1kΩ, 1/6w, 1% 07-21001-50 ax/.200x.080/.031 r272 metal film resistor 1kΩ, 1/6w, 1% 07-21001-50 ax/.200x.080/.031 r273 metal film resistor 2k2Ω, 1/6w, 5% 07-20222-50 ax/.200x.080/.031 r274 metal film resistor 150kΩ, 1/6w,...

  • Page 37

    Designator description part type part number footprint c212 ceramic capacitor 100pf, ±5%, 1kv 05-10113-04 cpax/.200x.100/.031 c213 ceramic capacitor 100pf, ±5%, 1kv 05-10113-04 cpax/.200x.100/.031 c214 ceramic capacitor 100pf, ±5%, 1kv 05-10113-04 cpax/.200x.100/.031 c215 ceramic capacitor 100pf, ±5...

  • Page 38

    Designator description part type part number footprint c258 polyester capacitor 100nf, ±5%, 250v 25-10422-01 rad/.300x.150/ls.200/.034 c259 alu electrolytic capacitor 1uf/50v, ±20%, 105 06-10951-03 cpcyl1/d.200/ls.200/.031 c260 alu electrolytic capacitor 100uf/16v, ±20%, 105 06-10111-07 cpcyl1/d.200...

  • Page 39

    Designator description part type part number footprint rl210 relays jrc-27f/012-s(555) 12-02101-02 relay_11 rl211 relays jqx-115f/036/1hs1 a12-03101-04 relay_1 rl212 relays jqx-115f/036/1hs1 a12-03101-04 relay_1 rl213 relays jqx-115f/036/1hs1 a12-03101-04 relay_1 rl214 relays jqx-115f/036/1hs1 a12-0...

  • Page 40

    Designator description part type part number footprint q304 transistor 2sd667-d 31-00667-01 to-92 resistor r301 metal film resistor 75kΩ, 1/6w, ±5% 07-20753-50 ax/.200x.080/.031 r302 metal film resistor 75kΩ, 1/6w, ±5% 07-20753-50 ax/.200x.080/.031 r303 chip resistor 47Ω, ±5%,0805 07-90470-01 sm/r_0...

  • Page 41

    Designator description part type part number footprint c324 alu electrolytic capacitor 10uf, ±20%, 50v, 105 06-10021-04 cpcyl1/d.300/ls.200/.031 c325 alu electrolytic capacitor 10uf, ±20%, 50v, 105 06-10021-04 cpcyl1/d.300/ls.200/.031 c326 polyester capacitor 100nf, ±5%, 63v 25-10461-07 rad/cap/.300...

  • Page 42

    Designator description part type part number footprint c402 alu electrolytic capacitor 10uf,400v,±20%, 105 06-10042-00 cpcyl1/d.400/ls.200/.031 c403 x capacitor 10nf/275v, ±10% a25-10322-05 rad/cap/.400x.200/ls.400/.031 c404 polyester capacitor 100nf, ±5%, 63v 25-10461-07 rad/cap/.300x.150/ls.200/.0...

  • Page 43

    Designator description part type part number footprint d514 led blue φ3, blue, bl-sb3248 33-50360-07 led/d.225/ls.100/.039 d515 led blue φ3, blue, bl-sb3248 33-50360-07 led/d.225/ls.100/.039 d516 led blue φ3, blue, bl-sb3248 33-50360-07 led/d.225/ls.100/.039 d517 switch diode 1n4148 33-44148-00 dax/...

  • Page 44

    Designator description part type part number footprint q546 transistor 2sc1815-gr 31-01815-00 to92/100/ecb q547 transistor 2sc1815-gr 31-01815-00 to92/100/ecb q548 transistor 2sc1815-gr 31-01815-00 to92/100/ecb q549 transistor 2sc1815-gr 31-01815-00 to92/100/ecb q550 transistor 2sc1815-gr 31-01815-0...

  • Page 45

    Designator description part type part number footprint r543 metal film resistor 1kΩ, 1/6w, 5% 07-20102-50 ax/.200x.080/.031 r544 metal film resistor 1kΩ, 1/6w, 5% 07-20102-50 ax/.200x.080/.031 r545 metal film resistor 1kΩ, 1/6w, 5% 07-20102-50 ax/.200x.080/.031 r546 metal film resistor 4.7kΩ, 1/6w, ...

  • Page 46

    Designator description part type part number footprint crystal x501 crystal 11.0592mhz,cl=15pf,hc- 49u/s 04-11102-00 crystal/.450x.200/ls.200/.031 connector x501 crystal washer (qw-3) 75-040001-0 j501 phone jack scj340r0gbs0b00 j17-02001-02 for ic503 ic socket dip40 13-22540-00 dip40 p501a wire ul24...

  • Page 47

    Designator description part type part number footprint r611 chip resistor 1kΩ ,1/8w,±5% 07-90102-00 sm/r_0603 r612 chip resistor 1kΩ ,1/8w,±5% 07-90102-00 sm/r_0603 r613 chip resistor 18kΩ ,1/8w,±5% 07-90183-00 sm/r_0603 r614 chip resistor 18kΩ ,1/8w,±5% 07-90183-00 sm/r_0603 r615 chip resistor 10Ω ...

  • Page 48

    Designator description part type part number footprint fuse t5al/250v c a20-12502-00 connector ac inlet to switch wire ul1672#16awg , red, l=100mm a14-37501-00 switch to fuse holder wire ul1672#16awg , red, l=100mm a14-37501-00 ac inlet to j401 wire ul1672#16awg,blue, l=460mm a14-37501-01 fuse holde...

  • Page 49

    S011 s011 t001 s002 r009 r008 r006 r004 s006 r007 r005 s002 r012 r013 s002 s005 r001 r011 r003 r002 s002 s013 r010 c012 s017 c005 c004 c006 s009 a005 a002 s016 s015 s005 a001 a004 a003 s008 s009 s010 c010 s004 s003 f022 f002 s002 f024 f020 s001 f021 f016 f012 f011 s001 f003 f013 f014 f017 f001 f015 ...

  • Page 50

    Ref.No part no. Description qty. Ref.No part no. Description qty. 01-37501-00 poweramp module assembly 2 f013 77-062001-1 led lens bezel 2 a001 70-124010-1 main heatsink 77-062011-1 led lens bezel ti:2 f003 j70-124002-0 end cap l 1 j71-124014-0 volume knob ti:1 s002 61-023106-0 self taping screws st...

  • Page 51

    4 1 5 7 3 6 8 9 10 2 11 12 ref.N0 part no. Description qty. 1 00-37500-10 c375bee ah version ah:1 00-37500-20 c375bee c version c:1 00-37500-30 c375bee ct version ct:1 2 90-005002-3 non-woven cloth 1 3 90-005001-0 polybag 1 4 89-005002-5 polyfoam end cap(2) 1 5 89-005001-6 polyfoam end cap(1) 1 6 ja...

  • Page 52

    Circuit change date improve power dissipation in standby 1) d403 changed from 8.2v to 4.7v 2) add d409 across ic402 pin1 and pin3, anode connect to pin3 3) d404 changed from 1n4007 to 1n5819, reconnect d404 cathode from ic402 pin1 to pin3 4) r521 changed from 130ohms to 270ohms 5) add another 1n4007...

  • Page 53

    Change details: 1. Main board change to vm4.0. Pcba pn changed from 01-37502-00 to 01-37502-01. Below are the changes on this board. A. Add d229 and d232 diode 1n5404 b. Add c282 2200uf/25v electrolytic capacitor c. Add p217b socket d. Add p216b socket 2. Tone board. Pcba pn changed from 01-37503-00...

  • Page 54

    Old and new parts compatibility 1w c375 version 0.5w c375 version 1w version vm2.0 pn: 01-37504-10 (ah) pn: 01-37504-20 (c) can not use otherwise standby power consumption will be higher than 0.5w standby board 0.5w version vm3.0 pn: 01-37504-11 (ah) pn: 01-37504-21(c) can be used after changing r40...

  • Page 55

    /1kv /1kv /1kv /1kv /1kv /1kv /1kv /1kv /1kv /1kv /1kv /1kv mp r in left cd in left tuner in left disc/pho in left aux in left tape2 in left tape2 out left tape1 in left tape1 out left mp f in to display board p701b from displa y board p702a all polyester capacitors are 63v 5% unless noted. All elec...

  • Page 56

    /1% /16v /1% /1% /1% /5% /5% /5% /5% /1% /1% tone defeat relay all polyester capacitors are 63v 5% unless noted. All elec. Capacitors are 50v 20% unless noted. All resistor are 1/6w 5% rj13 unless noted. Balance v o lume c o ntr ol /1kv /1kv balance /1% /16v /1% /1% /1% /5% /5% /5% /5% /1% /1% v o l...

  • Page 57

    All polyester capacitors are 63v 5% unless noted. All elec. Capacitors are 50v 20% unless noted. All resistor are 1/6w 5% rj13 unless noted. All zener diode are 1/2w unless noted. W403 only for c version w401&w402 only for ah version neutral live to display board from main transformer to main transf...

  • Page 58

    1 /100v /100v /250v /100v /100v /250v /100v /100v from main transformer /250v /250v from main transformer /16v /16v to left poweramp to right poweramp /1% /1% /1% /1% /1% /1% /1/2w /1/2w soft clipping /100v bridge trigger out /1/4w /16v /1/2w /2w ir in stereo position normal position to phono/access...

  • Page 59

    Sp a sp b mp tuner aux cd disc all polyester capacitors are 63v 5% unless noted. All elec. Capacitors are 50v 20% unless noted. All resistor are 1/6w 5% rj13 unless noted. To main board p205b t o main board p201b tape1 tape2 tone t o t one board p302b power t o st andby board p402b ipod input /1kv /...