1. DL manuals
  2. NAD
  3. Stereo Receiver
  4. C 725BEE
  5. Service Manual

NAD C 725BEE Service Manual

Other manuals for C 725BEE: Specifications, Owner's Manual

Summary of C 725BEE

  • Page 1

    Nad ser vice manual c 725bee stereo receiver c 725bee stereo receiver.

  • 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……………………………………………………. …….9-18 alignment procedure..................................

  • 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*'*$"5*0/0'$0/530-4 '30/5 1"/&- 1. Power 2. Power/standby /protection/led 3. Blend 4. Info 5. Memory 6. Tuner mode 1. +12v trigger out 2. Ir in / out 3. Mp input 4. Cd input 5. Disc input 6. Aux input 7. Tape input 8. Rec out 9. Pre out 10.Main in 11.Sub out 12.Speaker out 13.Soft clipping 14.O...

  • 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 52 w (maximum continuous power per channel 4 ...

  • Page 7: Preamplifier Section

    Preamplifier section line level inputs (mp, cd, disc, aux, tape) input impedance (r and c) 22 kohms + 100 pf input sensitivity (ref. Rated power) 320 mv maximum input signal > 4.5v signal / noise ratio, a-weighted 97.0 db ref. 1w (from cd input to speakers output, volume setting for 500mv in , 8ohms...

  • Page 8

    Cz 701 c z 704 cz705 cz 702 cb710 c o pyr ig h t c 2008 n ad c 7 2 5 bee c725 bee potboard nad na d e l e c tro nic ul2547#26awg ul2468#26awg cb 31 cz 3 4 ul2468 #26awg ul2468 #26awg copyright c 2008 nad electronics c725 bee keyboard ul2468#26awg cz 703 cz 709 cb38 headphoneb o ard cz46 cz45 c 7 2 5...

  • Page 9

    Module key pro. Poweramp linear +-46v switching power +5. 5 v isc trig ac det clipping soft powerboard section speaker b speaker a linear +5. 5 v relay relay rl12/2 rl12/1 mainboard section keyboard section unit p r o. Vfd ip sel defeat module preamp balance cb32 rt34 control rt32&rt31 rl39 tone isc...

  • Page 10

    2 3 1 ic702 ir receiver fm-6038tm2-5an p10 2 5 7 p91 1 p90 2 cnvss 3 p87/xcin 4 p86/xcout 5 reset 6 xout 7 vss 8 xin 9 vcc 10 p85/nmi 11 p84/int2 12 p83/int1 13 p82/int0 14 p81 15 p80 16 p 77 1 7 p 76 18 p 7 5 19 p 7 4 2 0 p 7 3 2 1 p 72 22 rxd 2 /p 7 1 2 3 txd 2 /p 7 0 2 4 txd1/ p 67 2 5 rxd1/ p 66...

  • Page 11: McU

    Mcu 30281fa key board ic703 11 i/o ports internal peripheral functions timer timer a0 (16 bits) timer a1 (16 bits) timer a2 (16 bits) timer a3 (16 bits) timer a4 (16 bits) timer b0 (16 bits) timer b1 (16 bits) timer b2 (16 bits) watchdog timer a-d converter (10bits x 13 channels) system clock genera...

  • Page 12: Cd4094

    Cd4094 keyboard:ic707 ic711 mainboard:ic32.

  • Page 13

    1 2 3 4 5 6 7 9 8 0 1 1 1 2 1 3 1 4 1 5 1 6 1 + 1 c + v - 1 c + 2 c - 2 c - v t u o 2 t t u o 2 r n i 2 r n i 2 t n i 1 t t u o 1 r t u o 1 t n i 1 r d n g c c v keyboard,sp232eep ic709 s m h o k 5 s m h o k 5 s m h o k 0 0 4 s m h o k 0 0 4 f u 1 . 0 f u 1 . 0 f u 1 . 0 f u 1 . 0 f u 0 1 t u p n i ...

  • Page 14

    24c16 key board ic705 pin configuration functional block diagram wp 8-pin pdip 1 2 3 4 8 7 6 5 a0 a1 a2 gnd vcc wp scl sda.

  • Page 15: Tps3825

    Processor supervisory circuit tps3825 key board ic704 block diagram: vdd _ + watchdog timer logic reset logic reset† reset mr‡ wdi transition detector.

  • Page 16: 74Hc86   Key Board Ic710

    74hc86 key board ic710 11 quad 2-input exclusive-or gate pin description pin no. Symbol name and function 1, 4, 9, 12 1a to 4a data inputs 2, 5, 10, 13 1b to 4b data inputs 3, 6, 8, 11 1y to 4y data outputs 7 gnd ground (0 v) 14 v cc positive supply voltage fig.1 pin configuration. Fig.2 logic symbo...

  • Page 17: Tc9164

    Tc9164 mainboard:ic31 pin connection: block diagram :.

  • Page 18: Tny274

    Tny274 powerboard:ic51 pin connection : block diagram:.

  • Page 19

    4. Connect a dc voltmeter totp3 and tp4 ,adjust vr12/vr13 for 6mv reading on voltmeter. 3. Connect a dc voltmeter totp1 and tp2 ,adjust vr22/vr23 for 6mv reading on voltmeter. 2. Input a high voltage signal such as 5v from cd input. 5. Adjusting vr302,make r channel output become to the lowest level...

  • Page 20

    D52 6v2 c54 47uf/25v c535 4n7/400v c51 10n/250v s2 + s1 - d51 kbu8d c52 10n/250v s2 + s1 - d55 kbu8d c517 15000uf/50v 10% c518 15000uf/50v 10% q517 a1015 d531 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 q510 a1015 q59 a1015 r534 2k2 r533 1m...

  • Page 21

    1 2 3 4 5 6 7 8 9 10 7 8 9 1 2 3 4 5 6 cz312* dab connector dab analog l dab analog r dab rxd dab txd dgnd agnd dab digital in vcc shield 1 2 3 cz311* con3 to ipod txd to ipod rxd to dab rxd to dab txd 1 6 2 7 3 8 4 9 5 cz39 db 9 r1 10 1 2 3 4 5 6 7 8 cz310 con8 to rs232 txd to rs232 rxd dgnd to key...

  • Page 22

    Jk41 1 2 3 cz45 phones socket n8c320d03 r458 100,fp ,5%,2w r459 100,fp ,5%,2w c725bee headphone board vc2.0 1 2 cz46 2pin r446 56k r445 56k d420 1n4148 d419 1n4148 +18v supply cir. C219 22n 10% 63v rca34d main-in r-ch l out r out d412 1n4148 d413 1n4148 +37v r450 10k r449 10k r454 510 r455 510 +37v ...

  • Page 23

    Dgnd c712 10n c717 100u/16v 2 3 1 ic702 dgnd ir receiver v s g +5.8v fm-6038tm2-5an r740 10k ir in ir out p102 57 p91 1 p90 2 cnvss 3 p87/xcin 4 p86/xcout 5 reset 6 xout 7 vss 8 xin 9 vcc 10 p85/nmi 11 p84/int2 12 p83/int1 13 p82/int0 14 p81 15 p80 16 p77 17 p76 18 p75 19 p74 20 p73 21 p72 22 rxd2/p...

  • Page 24

    R1 2 2 q 117 r1 6 3 r1 6 5 r1 6 2 d1 0 1 j5 0 j2 0 6 r3 6 6 r3 6 1 ic3 rl 3 1 0 d3 2 3 j196 q315 r1 6 4 c341 c3 2 8 c338 (g nd ) rt34 c340 q402 c303 c417 r407 q401 r402 c3 6 1 r3 6 3 r4 0 3 j123 j207 c302 q404 r406 c418 c301 r404 q403 r4 0 5 c327 r3 4 2 r3 4 3 r3 2 6 cz 3 4 j2 0 8 j2 0 9 j3 0 3 c339...

  • Page 25

    C530 na d el ec tr on ic c 7 2 5 bee ac o u tpu t bo ar d vm 1 .0 na d e l e c tro ni c ac o u tput c o pyr ig h t c 2008 t 2a l/250v f or 230v m ains cop y r ight c 2 0 0 8 nad electronic s t 4al/ 2 50 v f or 120v m a ins pot board v m 1.0 nad c 7 2 5 b e e d532 ic51 c53 j506 j504 d531 cop y r ight...

  • Page 26

    C725bee preamp module c62 c612 r622 c6 8 r616 r620 r 624 q611 q68 c 610 r6 2 q69 cz61 preamp module smd vm1.0 r64 r6 9 r6 7 c64q62 r612 r614 q65 r6 8 r 610 r617 toplayer q66 c6 7 c6 5 q64 r63 c61 r61 c69 r61 9 r61 5 r62 3 c61 3 r 625 q61c63 r618 q63 r6 11 q610 r613 c6 6 q612 q67 bottomlayer.

  • Page 27

    Q732 c725 keyboard + mpboard + rsr232board top layer c725bee rs232 board vm1.0 ic709 r788 c772 q733 cz709 r313 phone3 cz38 r314 cz39 r727 c711 d7 2 1 s702 q701 r790 ic707 r730 r729 c771 g ic702 c712 v q703* q723* c717 c718 r728 d 710 r735 r736 q706 r710 c706 c705 c716 r738 r737 c710 q7 11 q7 1 0 c71...

  • Page 28

    Bottomlayer power for dab gnd cz 7 0 4 cz705 cz702 cz701 cz711 trans pro det +5v5 standby +39v gnd gn d cb710

  • Page 29

    Check the handset itself check the +12v supply circuit check the key board and mcu check the ir in/out circuit (power board) is the +12v supply normal? Is the remote control ok? Is the remote handset itself is the ir in/out normal? No normal? Yes no yes no no ok yes yes troubleshooting guide is the ...

  • Page 30

    Electric parts list designator hs p/n part type mainboard 01-72501-10 ah 01-72501-20 c c311, c312 26-12251-11 1.2nj, 50v, 0805, npo c317, c318, c374, c375 26-10151-01 100pj, 50v, 0805, npo r311, r312, r317, r318 07-90471-01 470Ω ±5% r337, r341 07-90223-01 22k, ±5% 0805 r347, r348, r391, r392 07-9010...

  • Page 31

    C112, c113, c212, c213, c378, c379, c380 05-47113-00 470p,1kv ±10% c124, c224, c435, c436 05-10213-02 1nf,1kv ±10% c12, c22 05-47113-02 470pf, 1kv, ±5%, npo c351, c352, c353, c354, c355, c356, c362, c370, c371, c376, c377 24-10312-00 10n,100v 10% c369* 24-10312-00 10n,100v 10% c120, c220 24-22312-04...

  • Page 32

    R454, r455 07-10511-51 510Ω ±5% 1/4w r41, r42, r43, r44, r47, r48, r49, r410, r411, r413 07-10681-51 680Ω ±5% 1/4w r171, r271 07-10821-50 820r, 1/6w, ±5% r147, r247, r359, r360, r476 07-10102-51 1k, 1/4w, ±5% r160, r161, r162, r163, r167, r168, r260, r261, r262, r263, r267, r268, r403, r405, r406, r...

  • Page 33

    R156, r157, r256, r257, r472 07-10474-50 470k, 1/6w, ±5% r172, r272 07-10125-50 1m2 1/6w, ±5% r340, r448 07-10106-50 10mΩ, 1/6w, ±5% r149, r249 07-26809-50 68r, 1%,1/6w r103, r106, r111, r112, r119, r120, r203, r206, r211, r212, r219, r220 07-20820-50 82r,5%,1/6w r327 07-20181-50 180r, 1/6w, ±5% r32...

  • Page 34

    J1, j23, j32, j35, j44, j54, j61, j100, j125, j139, j144, j145, j158, j174, j180, j187, j189, j195, j196, j197, j199, j220, j253 21-06121-01 l=12.5mm j2, j7, j18, j49, j88, j111, j115, j117, j121, j126, j149, j150, j168, j170, j179, j185, j186, j194, j207, j208, j217, j218, j232, j240, j244, j256, j...

  • Page 35

    Vr12, vr22 09-02201-02 200r vr13, vr23 09-02202-01 2kΩ vr3, vr303, vr304 09-02103-00 10k rt31, rt32 j09-01103-14 10ka rt34 j09-01203-06 20k mn relays & switchs rl31, rl32, rl33, rl34, rl35, rl36, rl37, rl39 12-02101-02 jrc-27f/012/s rl38* 12-02101-02 jrc-27f/012/s rl310, rl311 12-02202-06 hfd3/12 rl...

  • Page 36

    Binding post parts 69-001001-0 hpb59-1 binding post parts 69-001002-0 hpb59-1 binding post parts 71-001001-1 abs binding post parts 66-005006-0 tin plate t=0.50 binding post parts 69-005006-0 h62y2 t=1.0 binding post parts 69-002004-0 t2y2 t=1.0 links j16, j17, j184, j250 21-06221-01 l=22.5mm j6, j6...

  • Page 37

    R67, r68, r611, r612, r622, r623 07-90102-00 1kΩ, ±5% r613, r614 07-90103-00 10kΩ, ±5% r63, r64 07-90225-00 2.2mΩ, ±5% connectors cz61(inserted, to, cb32.Cb33, on, the, main, board) 13-12509-01 s006 assy heatsink 02-72500-00 q119, q219 31-02690-00 ksc2690 q114, q214 j31-01943-00 2sa1943 q115, q215 j...

  • Page 38

    C534 a25-10322-04 mkp64, x1,10nf,310v,±20% c536, c550, c553 24-10412-01 0.1u,100v,20% c546 a05-22242-00 2.2nf, 400v(x1), 250v(y1),±5% c535, c539 a05-47242-00 4n7p, 400v, ±20% sleeve boot 78-001001-1 sleeve boot c51, c52, 25-10322-00 10n/250v 10% c56 a25-22422-03 mkp62, 275v, 0.22uf 10% c56 or a25-22...

  • Page 39

    Connectors cb55, cb56, cb58, 13-23903-01 vh 3.96a-3a cb57 13-23903-11 vh 3.96a-3a cb54 13-23904-00 vh 3.96a-4a cb51 13-23905-12 vh 3.96a-5a cb52 13-22510-00 xhb2.5a-10a cb59 13-22507-00 xhb2.5a-7a cb53--cb47 14-72507-00 ul2468#26awg, 2.5a-7d plug,xhb 2.5a-7y connector,white l=100mm links j503, j504,...

  • Page 40

    R763, r764, r779, r780 07-90100-01 10r, ±5%, 0805 r773 07-90330-01 33r, ±5%,0805 r761, r762 07-90101-01 100r, ±5%,0805 r702, r765, r777, r778 07-90102-01 1k, ±5%, 0805 r766 07-90152-01 1k5, ±5%,0805 r722, r795 07-90222-01 2.2k, ±5%, 0805 r703, r727, r728, r729, r730, r731, r732, r733, r734, r735, r7...

  • Page 41

    C704, c717, c776 06-10111-00 100uf, 16v, ±20% resistor network r748 07-01002-09 10k, 2%, 9pin switchs s701, s702, s703, s704, s705, s706, s707, s708, s709, s710, s711, s712, s713, s714, s716, s717, s718 11-04101-00 selector connectors cz711--cb59 14-72507-01 ul2468#26awg,scn 2.5a-7d plug,xhb 2.5a-7y...

  • Page 42

    R717 07-10101-50 100Ω ±5% 1/6w r718, r744 07-10221-50 220Ω ±5% 1/6w leds d707 33-50565-02 led switchs s715 11-04101-05 it-1102a-1160 connectors cb710——cz710 14-72506-00 ul2468#26awg,scn 2.5a-6dw plug,xhb 2.5a-6y connector,white l=80mm headphone board 01-72508-00 resistors r458, r459 07-30101-04 100Ω...

  • Page 43

    Tuner bracket 66-047004-0 secc-n5 t=1.0mm metal disc 66-001008-0 hs40-c320_b009v1-m020 shielding box 67-091003-0 transformer shorting plug 30-63200-00 hs40-c320_b009v1-m014 fasteners self taping screws 61-023205-0 btb3x5 self taping screws 61-023206-0 btb3x6 self taping screws 61-023208-0 btb3x8 sel...

  • Page 44

    Fuse causion label 94-003004-0 34×84 epe film 90-123001-0 420x206mm accessories instruction manual 30-47250-00 instruction manual 30-47251-00 remote control j30-17250-00 sr-8 batteries 30-22100-10 5# 2006/66/ec remote control j30-17251-00 krc-l1860rc(zr5) batteries 30-28601-10 cr2025 2006/66/ec for ...

  • Page 45

    Ac cord(euro) ja15-02251-24 lp-21 & h03vvh2-f 2×0.75mm2 & vh3.96- 3pin ac cord(euro) or a15-02251-25 2vtj1 & h03vvh2-f 2×0.75mm2 & vh3.96- 3pin ac outlet ja17-07002-20 a302-d006-0p ac outlet(2) 61-023208-0 btb3x8 ac outlet(1) 78-000500-0 Φ50 rear panel(c) 67-123002-0a secc-n5 t=1mm rear panel(c) 80-...

  • Page 46

    6hoi7dslqj6fuhz 61-084106-2 stpw4x6 volume knob 73-020002-1 7, tone knob 73-020001-1 7, volume knob bezel 77-091013-1 7, selector knob 75-047011-2 7, plastic subfascia 77-123011-1 abs 765b mp button bezel 77-123012-0 pc, ul94v-0, ti selector knob bezel 77-123013-0 pc, ul94v-0, ti duo buttons 74-1230...

  • Page 47

    S020 s021 f001 f004 f005 f006 f010 f007 f002 f003 f009 f019 f011 f015 f018 f008 f013 f014 f021 f020 f012 c001 s002 s002 s010 s003 s018 s005 s022 s002 s009 p003 s005 s007 s005 c002 c013 c009 c008 c003 c004 c005 c006 c007 s015 s014 s016 s011 s012 s013 t001 c015 c016 r001 r002 r007 r005 r006 m005 s001 ...

  • Page 48

    Ref.N, part,n, . Descripti, n qty. Ref.N, part,n, . Descripti, n qty. C001 66-123001-1 chassis 1 r004 01-72505-10 rs232,board ah:1 c002 66-047003-0 base,cover 1 01-72505-20 rs232,board c:1 c003 66-001010-0 thansbracket 1 r005 a11-01101-03 rock,s, itch 1 c004 67-091003-0 shielding,box 1 r006 a84-0010...

  • Page 49

    C725bee packing accessory section 4 1 5 7 3 6 8 9 10 2 ref.N0 part no. Description qty. 1 00-72500-10 c725bee ah version ah:1 00-72500-20 c725bee c version c:1 00-72500-30 c725bee ct version ct:1 00-72500-30 c725bee aht version aht:1 2 90-005002-3 non-woven cloth 1 3 90-005001-0 polybag 1 4 89-00500...

  • Page 50: Ser

    Ser vice manual © nad 2008 c 725bee stereo receiver nad electronics ltd toronto.