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NAD C 325BEE Service Manual

Other manuals for C 325BEE: Owner's Manual, Notes On Usage
Manual is about: Stereo Integrated Amplifier

Summary of C 325BEE

  • Page 1

    Nad ser vice manual c 325bee stereo amplifier c 325bee stereo amplifier 1.

  • Page 2: Table of Contents

    Table of contents description p a g e service caution………………………………………………………… 3-4 rear panel/front panel view………………………………………...5 specifications………………………………………………………….6-7 wiring diagram………………………………………………………………8 block diagram……………………………………………………. …….9-14 alignment procedure……………………………………………..15 schemati...

  • Page 3

    Product safety servicing guidelines caution : do not attempt to modify this product in any way. Never perform customized installations without manufacturer’s approval. Unauthorized modifications will not only void the warranty, but may lead to your being liable for any resulting property damage or u...

  • Page 4: Servicing Precautions

    Servicing precautions caution : before servicing the a/v receiver 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 in ...

  • Page 5

    ,5,1387287387 ',6&,1387 &',1387 9,'(2,1387 $8;,1387 781(5 input 7$3(,1287 7$3(,1287 35(287 0$,1,1 63($.(5287 62)7&/,33,1* $&/,1(&25' 975,**(5287 6:,7&+('$&287/(721/)25$+ 32:(5 32:(567$1'%3527(&7,21/(' +($3+21( ,55(&(,9(5 ,13876(/(&725 62)7&/,33,1* led 721(&21752/6 721('()($7 %$/$1&( 92/80( 5.

  • Page 6: Specifications

    Specifications power amplifier section stereo mode continuous average power 50 w (17 dbw) output into 8 ohms or 4 ohms (min. Power per channel, 20 hz – 20 khz, with no more than rated distortion) rated distortion 0.03% (thd 20 hz – 20 khz) clipping power 68 w (maximum continuous power per channel 4 ...

  • Page 7

    Preamplifier section line level inputs (disk, cd, video, auxiliary, tuner, tape 1,tape 2) input impedance (r and c) 200 kohms + 320 pf input sensitivity (ref. Rated power) 220 mv maximum input signal 6 v signal / noise ratio, a-weighted 93.0 db ref. 1w (from cd input to speakers output, volume setti...

  • Page 8

    +46v red ipod socket board -46v white cb11 p5-gnd +46v red cb33 -46v white cb52 cb53 cb58 headphone board standby board cz45 power board cz72 ir board cb54 q115 p4-r p3-r cb55 cb57 cb59 cb56 cb51 out module board cb73 cb74 s72 s71 s73 s74 s76 s75 cz73 cb72 cz71 s77 cz72_1 cb61 cb61 cz74 cz75 key boa...

  • Page 9

    Tape1 out l input selection circuit (by relay) disc l disc r cd r video r aux r tape1 in r tape1 in l aux l video l cd l ic 75 cd4094 mcu preapm m o dul e am p ci rcui t in ˄˅ bass rt31 rt32 rt34 treble balance sw31 tone defeat rt33 volume mute mute q31 pre-out l q32 pre-out r main in r main in l so...

  • Page 10

    2 3 1 ic72 is1u60l +5v +5v 1 3 2 ic76 tcm810mend ir o u t circuit ir in circuit 10k 10k 2k2 q717 +5v sandby c ont rol line 18v pow er supply circuit 27pf microprocessor connection diagram +5v rst /v pp 1 p 3 .0(r xd) 2 p 3 .1(txd) 3 xtal2 4 xtal1 5 p 3 .2(into) 6 p 3 .3(int1) 7 p3 .4 8 p3 .5 9 gnd 1...

  • Page 11

    Tl082d main board ic41&ic42&ic43 - + + - a b 1 2 3 4 5 6 7 8 v+ output b inverting input b non-inverting input b v- non-inverting input a inverting input a output a key board ic74&ic75 cd4094 2 cl cl d q 1 cl cl d q 2 tr tr tr tr 3 1 * vdd vss * allinputs protected by cmos protection network cl cl 8...

  • Page 12

    Upc1237ha main board: ic44 overload detector output offset detector switch for latch/automatic --reset flip--flop vcc on mute ac---off detector relay d river 1 2 4 3 5 7 8 6 gnd vcc ics block diagram 1 8 8pin plastic slim sip 12.

  • Page 13

    24c01 key board ic71 3,1&21),*85$7,21 ! &21752/ /2*,& ; '(&2'(5 6/$9($''5(66 5(*,67(5 &203$5$725 :25'$''5(66 &2817(5 +,*+92/7$*( *(1(5$725 7,0,1* &21752/ ((3520 $55$ '(&2'(5 '$7$ 5(*,67(5 &orfn ',2 $&. *1' :3 6&/ 6'$ 9ff q026 )81&7,21$/%/2&.',$*5$0 1 2 3 4 5 6 7 8 nc nc nc vss vcc nc scl sda 13.

  • Page 14

    At89c4051 key board ic73 pin configuration pdip/soic rst/vpp 1 (rxd) p3.0 2 (txd) p3.1 3 xtal2 4 xtal1 5 ( int0 ) p3.2 6 (to) p3.4 8 ( int1 ) p3.3 7 (t1) p3.5 9 gnd 10 p3.7 11 p1.0 (ain0) 12 p1.1 (ain1) 13 p1.2 14 p1.3 15 p1.4 16 p1.5 17 p1.6 18 p1.7 19 vcc 20 ram addr. Register rma b register acc t...

  • Page 15

    Alignment procedures i. Initial a. Lowest volume adjustment 3. Connect a oscilloscope to l channel binding posts. 1. Tune the volume pot to lowest state. 2. Input a high voltage signal such as 5v from cd input. 4. Observing the oscilloscope,adjust vr301,make the output of speakers become to the 5. A...

  • Page 16

    C61 220p r61 220 r63 1m q61 2sk170 r67 1k r69 430 2% q63 a970 q67 d667 c63 22p r611 1k q64 b647 r613 10k d61 1n4148 d62 1n4148 r615 33 c65 0.1u 20% c66 0.1u 20% c69 100p r618 10 r619 10 r620 10 1 2 3 4 5 6 7 8 9 cz61 con9 r621 30k c611 gnd +18v -18v lout rout rin- rin+ lin+ lin- preamp in/out module...

  • Page 17

    Over heat protection: it shuts down the unit when the temperature on the heatsink is over 90c degrees. It also shuts down the unit when the unit enters the standby mode. Isc circuit: it switch the power supply to lower voltage when the load impedance is low, or the temperature on the heatsink is ove...

  • Page 18

    Q1 4 q2 5 q3 6 q4 7 q5 14 q6 13 q7 12 q8 11 qs 9 qs 10 st r 1 d 2 cl k 3 oe 15 vc c 16 vee 8 ic74 4094 q1 4 q2 5 q3 6 q4 7 q5 14 q6 13 q7 12 q8 11 qs 9 qs 10 st r 1 d 2 cl k 3 oe 15 vc c 16 vee 8 ic75 4094 c79 27p c710 27p y71 11. 0592m h z c77 10n c78 0.1u +5v c711 0.1u 20% c vi tu ta 2 ta 1 di s71...

  • Page 19

    Nad c325bee power cir. C51 10n/250v d51 kbu8d c52 10n/250v d55 kbu8d c517 15000uf/50v 10% c518 15000uf/50v 10% d531 tic116d d532 tic116d r558 1k r563 22k r561 100 r562 1k r560 1k r559 1k r565 100 r564 22k r531 0.05/3w 5% ce r532 220 r534 2k2 r533 1m r566 4k7 d513 1n4004 r544 22k c523 3300u/50v c524 ...

  • Page 20

    Q 11 6 pcb-1: main board vm2.0 c345j110 c339 c341 c122 c121 rt32 rt34 j118 rt31 r3 64 c3 28 c 335 r 319 r3 20 r3 24 c3 36 j113 (gnd) r3 22 r3 26 j114 j11 6 j115 (gnd) j111 j11 2 j11 7 r3 63 r3 61 c 333 c 331 j104 r3 62 r3 29 r3 28 sw31 r3 27 r3 25 c 330 c3 29 c3 27 r3 23 r3 21 j1 21 c332 c334 r 158 ...

  • Page 21

    C 6 11 pcb-2:power board vm1.0 q510 q67 module board vm1.0 pcb-6:out module vm1.0 c 6 9 r611 r 6 1 7 cb61 r620 r 6 8 r610 c610 q65 q62 r 6 18 q68 c62 r612 d 6 3 c66 r621 c 6 11 r 6 1 r 6 3 r 6 4 r 62 r619 r69 c 6 4 c 6 3 q61 c61 d 6 1 c68 n a d el ect ro ni c s cop y ri g h t c 2 00 6 n a d c3 2 5be...

  • Page 22

    22 c325bee headp vm1.0 pcb-10:headphone board vm1.0 (g nd) c 71 7 j41 jk4 1 r4 54 c71 r764 r703 r73 r730 c77 cb72 red j794 d716 cz 71 c 72 2 r762 j7 46 r702 j7 47 r 741 q7 12 c 715 r 74 2 q7 10 r753 q717 c723 c 714 q7 9 r 74 6 c 719 j7 50 (g n d ) (gnd) q7 14 (g n d ) j749 j7 48 cz 72 pcb-9:ipod boa...

  • Page 23

    (top view) pcb-4:amp-smd-l board vm1.0 c224 r269 l22r259r249 c23 cz21 c 22 r 22 0 c24 q202 r212 c325bee amp-smd-l vm1.0 q204 q102 r112 q104 r205 cz11 r105 r 2 55 r 2 10 r 2 04 r 22 2 r 2 0 6 d24 c204 d26 q23 r223 q22 r216r215 r211 q25 q27 q29 c29 q24 q26 c28 q203 q28 r29 q201 r 22 1 r 2 54 r 2 03 r ...

  • Page 24

    Troubleshooting guide push the power supply is the amber led amber yes no can pressing any key make ok is it red? No yes check the protect ciruit no check the 5v supply circuit (on power board) yes check the amber led control is it green? Circuit(q72,q73,q74,led717) no no is the standby singal low l...

  • Page 25

    Circuit no. Part no. Description ics ic41, ic42, ic43 03-00082-00 tl082cp/cn/d ic44 03-01237-00 upc1237ha ic45 03-01117-01 ams1117-5.0/ lm1117mpx-5.0 ic11, ic21 03-00431-03 az431bz-b diodes d430 db104 d17, d27, d101, d102, d103, d201, d202, d203, d37, d38, d39, d310, d311, d312, d313, d315, d316, d4...

  • Page 26

    C327, c328, c119, c219 25-22361-01 22n, 63v, ±5% c329, c330 25-10461-05 0.1uf, 63v, ±5% c114, c115, c118, c214, c215, c218, c411, c412 25-10461-01 0.1uf, 63v, ±10% c17, c27, c322, c321, c345, c346, c337, c338, c319, c320 25-10461-06 0.1uf, 63v, ±10% c331, c332 25-22461-02 0.22uf, 63v, ±5% c121, c122...

  • Page 27

    R422, r423, r424, r425 07-10132-50 1k3, 1/6w, ±5% r428, r440, r158, r258 07-10222-51 2k2, 1/4w, ±5% r480 07-10392-51 3k9, 1/4w, ±5% r401, r482, , r333, r334, 07-10472-51 4k7, 1/4w, ±5% ri4 07-10472-50 4k7, 1/6w, ±5% r429 07-10512-51 5k1, 1/4w, ±5% r166, r266 07-10562-50 5k6, 1/6w, ±5% r12/1 07-10682...

  • Page 28

    Vr301, vr302 09-02101-00 100r vr12, vr22 09-02201-02 200r vr3 09-02103-00 10k vr304, vr303 09-02303-00 30k rt31, rt32 09-01103-01 rk163121a2ca 10kax2 rt33 09-01203-01 rk16812mg 20kbx2 rt34 09-01203-03 rk163121a10d 20kmn switchs s41 11-05202-02 sk-22f03g7 sw31 11-02202-02 spun190700 relays rl31, rl32...

  • Page 29

    J3, j7, j28, j29, j38, j42, j46, j49, j50, j56, j57, j58, j59, j65, j88, j93, j94, j95, 101, j102, j105, j106, j107, j108, j110, j119, j120, j121, j126, j127, j128, j129, j130, j131, j135, j138, j139, j140, j141, j150, j151, j152, j154, j155, j159, j160, j161, j162, j163, j172, j174, j175, j176, j18...

  • Page 30

    C65, c66, c67, c68 24-10461-00 0.1uf, 63v, ±20% resistors r617, r618, r619, r620 07-20100-50 10 ¡, 1/6w, ±5% r615, r616 07-20330-50 33 ¡, 1/6w, ±5% r61, r62 07-20221-50 220 ¡, 1/6w, ±5% r69, r610 07-24300-50 430 ¡, 1/6w, ±1% r67, r68, r611, r612 07-20102-50 1k ¡, 1/6w, ±5% r613, r614 07-20103-50 10k...

  • Page 31

    R169 07-93300-01 330 ¡, ±1% r19, r101, r105, r110 07-93902-01 39k ¡, ±1% r123 07-94702-01 47k ¡, ±1% r121, r122 07-91003-01 100k ¡, ±1% r102, r104 07-92203-01 220k ¡, ±1% capacitors c18, c19 26-39051-01 39pf, 50v, ±5% c12, c124 26-10251-11 1nf, 50v, ±5% c13, c14 06-10031-02 vss, 10uf, 35v, ±20% c103...

  • Page 32

    Cb53——cb47 14-32507-10 scn 2.5a-7d needles,xhb 2.5a-7y plug. 26awg ul2468# white, 230mm length links j52, j57, j513, j517 21-06000-00 l=5 j516, j520 21-06000-00 l=7.5 j51 21-06000-00 l=10 j514 21-10101-00 l=10 j54, j58, j518 21-06000-00 l=12.5 j510 21-06000-00 l=15 j56 21-10151-00 l=15 j515 21-06000...

  • Page 33

    Cz71--cb34 14-32509-00 scn 2.5a-9d needle,xhb 2.5a-9y plug. 26awg ul2468#, white , 400mm length cz72--cb31 14-32510-00 scn 2.5a-10d needle,xhb 2.5a- 10y plug. 26awg ul2468#, white , 430mm length links j71, j72, j73, j74, j75, j79, j710, j716, j733, j735, j745, j746, j747, j749, j753, j794 21-06000-0...

  • Page 34

    Heatsink (small2) 70-065002-0 alu 6063 black machine screw 61-022510-5 mb2.5×10 machine screw 61-022514-5 mb2.5×14 nut 62-010202-5 m2.5 rivet 61-382003-5 gb975-86-2.5×3 connecters 14-32502-23 vh 3.96a-3y(delete center needle) plug. 18awg ul1672#, red/blue,180mm length. Cb59——ac outlet(ah) 14-32502-3...

  • Page 35

    T001 c013 s011 s010 c012 c011 s011 c010 c009 f002 f001 f003 f013 f008 f004 f011 f011 f006 f014 f017 f018 s004 r001 r004 r005 r003 r002 c003 c002 c004 c001 r006 f010 f009 s010 s012 s009 s001 s008 s007 s007 f016 s001 s001 s006 s005 s001 s002 s002 c014 c005 s002 s001 s001 s001 s001 s002 s012 c007 c008 ...

  • Page 36

    Ref.No part no. Description qty. Ref.No part no. Description qty. C001 66-065001-0 chassis 1 f016 01-32503-00 key board assy 1 c002 66-001004-1 base cover 1 f017 74-065001-0 power button 1 c003 75-010004-0 foot 4 f018 92-048001-0 spring for button 1 c004 78-001002-0 foot pad 4 f019 01-32508-00 stand...

  • Page 37

    Protect ic change 37 r19 56k r10 100k q13 2sc1815gr q14 2sc1815gr 1 2 3 4 5 6 7 8 j10 con8 d10 1n4148 r15 10k q10 2sa1015gr r16 10k r11 100k r13 10k q15 2sc1815gr r22 820k r20 220k q16 2sc1815gr q17 2sc1815gr r25 4.7k r24 180k q11 2sa1015gr r12 10k r21 220k q18 2sc1815gr q12 2sa1015gr r17 100k d12 1...

  • Page 38: Ser

    Ser vice manual © nad 2006 c 325bee stereo amplifier nad electronics ltd toronto 37.