NAD C 725BEE Service Manual
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NAD C 725BEE Service Manual

NAD C 725BEE Service Manual

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See also: Owner's Manual
NAD
C 725BEE
STEREO
RECEIVER

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Summary of Contents for NAD C 725BEE

  • Page 1 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............19 SCHEMATICS……………………………………………………………..20-23 PCB LAYOUT……………………………………………………………….24-28 TROUBLE SHOOTING GUIDE…………………........29 ELECTRICAL PARTS LIST…………………………………………….30-46 EXPLODED VIEW……………………………………………………………..47 EXPLODED VIEW PARTS LIST……………………………………………..48 C725BEE PACKING ACCESSORY AND PARTS LIST......49...

  • Page 3: Service Caution

    PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S. ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE WITHOUT MANUFACTURER’S APPROVAL. UNAUTHORIZED EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.
  • Page 4 SERVICING PRECAUTIONS CAUTION : Before servicing the A/V Receiver covered by this Electrostatically Sensitive (ES) Devices service data and its supplements and addends, read and follow the Some semiconductor (solid state) devices can be damaged easily by SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances static electricity.

  • Page 5: Rear Panel/Front Panel View

    1. Power 7. Preset 14.Speaker A & B 2. Power/Standby 8. Tune 15.MP input /Protection/Led 9. VFD 16.Input selector 3. Blend 10.IR Receiver 17.Tone defeat 4. Info 11.Record out / Zone 2 selector 18.Tone controls 5. Memory 12.Volume 19.Balance 6. Tuner Mode 13.Headphone 1.

  • 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 and 8).
  • Page 7 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 1W out) Signal to noise ratio preamp out, IHF “A”...

  • Page 8: Wiring Diagram

    To AC Outlet UL1691#24AWG CB57 CB311 CZ37 FPC-1.25-17P-220MM UL2468#26AWG CZ36 CB47 UL2468#26AWG FPC-1.25-20P-600MM C725 BEE POWERBOARD UL1015#14AWG black COPYRIGHT C 2008 NAD ELECTRONIC UL1015#16AWG red,white CB54 CB32 CB51 UL2468#26AWG IN MODULE CB52 C725 BEE MAINBOARD CZ38 CB46 CB33 C725 BEE POTBOARD...

  • Page 9: Block Diagram

    BLOCK DIAGRAM KEYBOARD SECTION HCF4094 IC703 IC32 IP SEL SPEAKER B SPEAKER A STANDBY TONE DEFEAT TUNE MAINBOARD SECTION RL39 DISC PREAMP TAPE TONE VOLUME MODULE CONTROL CONTROL CB32 RT32&RT31 RT33 PRO. CIRCUIT MODULE REC OUT RL12/1 SPEAKER A RELAY SOFT CLIPPING POWERAMP...
  • Page 10 TUNER MODULE CZ711 MCU CONNECTION DIAGRAM TO POWER BOARD Q734 CZ706 C1815 CON2 +5.8V CON2 CZ707 IC704 RESET RESET TPS3825-50DBVT +5.8V DGND R773 IC705 1MEG CNVss R774 CNVSS P87/XCIN P86/XCOUT SDA/P20 18.432 MHz Reset 24C16 RESET SCL/P21 IR RECEIVER Y701 IC702 XOUT FM-6038TM2-5AN...
  • Page 11 30281FA KEY BOARD IC703 Port P0 Port P1 Port P2 Port P3 Port P6 Port P7 Port P8 Port P9 Port P10 Ports Internal Peripheral Functions Timer Timer S Serial Ports System Clock Generator Timer A0 (16 bits) U(S)ART/SIO (channel 0) Xin-Xout Input Capture (8 channels) Timer A1 (16 bits)
  • Page 12 CD4094 KEYBOARD:IC707 IC711 MAINBOARD:IC32...
  • Page 13 IC709 keyboard,SP232EEP...

  • Page 14: Block Diagram

    24C16 KEY BOARD IC705 PIN CONFIGURATION 8-Pin PDIP FUNCTIONAL BLOCK DIAGRAM...
  • Page 15 PROCESSOR SUPERVISORY CIRCUIT TPS3825 KEY BOARD IC704 BLOCK DIAGRAM: Reset † Watchdog Reset Timer Logic Logic Reset MR ‡ Transition Detector...
  • Page 16 74HC86 KEY BOARD IC710 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 ground (0 V) positive supply voltage...
  • Page 17 TC9164 MAINBOARD:IC31 PIN CONNECTION: BLOCK DIAGRAM :...
  • Page 18 TNY274 POWERBOARD:IC51 PIN CONNECTION : BLOCK DIAGRAM:...

  • Page 19: Alignment Procedure

    ALIGNMENT PROCEDURES I. INITIAL A. LOWEST VOLUME ADJUSTMENT 1. Tune the volume pot to lowest state. 2. Input a high voltage signal such as 5V from CD input. 3. Connect a oscilloscope to L channel binding posts. 4. Observing the oscilloscope,adjust VR301,make the output of speakers become to the lowest level.

  • Page 20: Schematics

    AC POWER CORD CB55 CZ55 C725BEE POWERBOARD R531 R562 0.05/3W 5% CE R561 R563 R532 CB56 CZ56 POWER SWITCH Q510 Q517 A1015 C535 SW52 A1015 R558 4n7/400V D531 TIC116D A1015 T4AL/250V For 120V Mains Version -46V +46V T2AL/250V For 230V Mains Version CB54 R569 R533...
  • Page 21 C725BEE PREAMP C725BEE INPUT SELECT CIRCUIT RL32B RCA31C RT33A RT33B RT33C C725BEE TONE CONTROL CIRCUIT C325 POTALPS CZ34 CB31 POTALPS POTALPS 47u/25 TO VOLUME POT R349 100p R325 390 MF R329 1K5 MF C321 RL33B 0.1u C327 RCA32A 22n 5% VIDEO Moto Pots Borad CON9...
  • Page 22 C725BEE AMP C725BEE POWER AMP CIR. R D412 +37V +18V +46V L OUT R154 R101 R130 C436 1N4148 39k,MF,5% 82/1W FS R132 3K3/2W FP R142 Q103 R172 C114 R162 D101 I/V For Over C2240 R119 0.1u 10% R12/1 C12/1 10u/35V 1N4148 R126 3K3/2W FP 22,MF,5%...
  • Page 23 C725BEE KEYBOARD C725BEE MP BOARD D718 +12V CZ703 R795 1N4148 2.2K +5.8V TP701 D719 BLUE IC701 CZ701 16-BT-130GINK N.I. R791 +5.8V CZ709 RDS DATA R777 R778 C739 AGND R767 RDS CLK N.I. Q732 IC705 C720 C730 C731 C732 PLL CE C1815 C770 N.I.

  • Page 24: Pcb Layout

    CB47 +18V ISC TRIG IC32 AC DET. +37V C358 -37V D324 DGND J126 J103 J320 J102 J101 COPYRIGHT C 2008 NAD ELECTRONIC R484 J107 +46V NAD C725BEE MAIN BOARD Vc3.0 (R-OUTPUT) -46V J127 J128 J331 J315 (+5V) J129 J130 J131...
  • Page 25 C725BEE POWER+POT+AC OUTLET+STANDBY PCB POWER PCB D510 C534 To Power Swicth CB56 AC OUTLET PCB C531 CB58 To AC Outlet J501 C535 C530 C539 CB57 To Thansformer IC51 J504 IC53 RL51 C533 C536 C545 STANDBY PCB D533 J512 Version 230V 12OV C517 R717...
  • Page 26 C725BEE PREAMP MODULE TOPLAYER R614 R613 R612 Q65 R617 R618 Q63 Q612 C64Q62 Q610 Q61 C63 PREAMP MODULE SMD Vm1.0 CZ61 BOTTOMLAYER...
  • Page 27 R777 S707 S716 S713 S712 S718 S717 S714 S702 R793 R795 S711 C772 R791 IC705 NAD C725BEE KEY BOARD Vm1.0 R767 R788 C770 COPYRIGHT C 2008 NAD ELECTRONICS C732 C725BEE RS232 BOARD Vm1.0 CZ310 CZ311 R313 R314 CZ39 PHONE3 CZ38...
  • Page 28 BOTTOMLAYER CB710 +39V +5V5 POWER FOR DAB STANDBY TRANS PRO DET CZ705...

  • Page 29: Troubleshooting Guide

    TROUBLESHOOTING GUIDE PUSH THE POWER SWITCH TO ON CHECK THE +5V SUPPLY IS THE 3-COLOUR-LED AMBER LIGHT? IS IT RED? IS IT BLUE (POWER BOARD) CHECK THE LED CONTROL CIRCUIT AND PROTECTION CIRCUIT CAN PRESSING ANY KEY TO MAKE ARE ALL POWER SUPPLIES OK? CHECK ALL POWER SUPPLIES THE UNIT WORK NORMALLY? IS THE 3-COLOUR-LED RED AFTER...

  • Page 30: Electrical Parts List

    ELECTRIC PARTS LIST Designator HS P/N Part Type MAINBOARD 01-72501-10 01-72501-20 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 07-90104-01 100KΩ...
  • Page 31 C112, C113, C212, C213, C378, 05-47113-00 470p,1KV ±10% C379, C380 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, 24-10312-00 10n,100V 10% C377 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, 07-10681-51 680Ω ±5% 1/4W R49, R410, R411, R413 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, 07-10102-50 1K, 1/6W, ±5%...
  • 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, 07-20820-50 82R,5%,1/6W R219, R220 R327 07-20181-50 180R, 1/6W, ±5%...
  • Page 34 J1, J23, J32, J35, J44, J54, J61, J100, J125, J139, J144, J145, J158, 21-06121-01 L=12.5mm J174, J180, J187, J189, J195, J196, J197, J199, J220, J253 J2, J7, J18, J49, J88, J111, J115, J117, J121, J126, J149, J150, J168, J170, J179, J185, J186, J194, J207, 21-06151-00 L=15mm J208, J217, J218, J232, J240, J244,...
  • Page 35 VR12, VR22 09-02201-02 200R VR13, VR23 09-02202-01 2KΩ VR3, VR303, VR304 09-02103-00 RT31, RT32 J09-01103-14 10KA RT34 J09-01203-06 20K MN RELAYS & SWITCHS RL31, RL32, RL33, RL34, RL35, 12-02101-02 JRC-27F/012/S RL36, RL37, RL39 RL38* 12-02101-02 JRC-27F/012/S RL310, RL311 12-02202-06 HFD3/12 RL12/1, RL12/2 A12-03102-05 JQX-115F/024-2HS4AF(144)(555)

  • Page 36: Gnd-

    BINDING POST PARTS 69-001001-0 HPB59-1 BINDING POST PARTS 69-001002-0 HPB59-1 BINDING POST PARTS 71-001001-1 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, J69, J70, J91, J92, J95, J135, J137, J138, J140, J156, J161, J164, 21-06251-00...
  • 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, 13-12509-01 S006 ON, THE, MAIN, BOARD) ASSY HEATSINK 02-72500-00 Q119, Q219 31-02690-00 KSC2690 Q114, Q214 J31-01943-00 2SA1943 Q115, Q215 J31-05200-00 2SC5200...
  • 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% A25-22422-03 MKP62, 275V, 0.22uF 10% or A25-22422-09 MPX, 275V, 0.22uF 10% C531 06-10042-00 CD11H, 10uF/400V, 20%...
  • Page 39 CONNECTORS CB55, CB56, CB58, 13-23903-01 VH 3.96A-3A 13-23903-11 CB57 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 UL2468#26AWG, 2.5A-7D plug,XHB 2.5A-7Y CB53--CB47 14-72507-00 connector,white L=100mm LINKS J503, J504, J514, J516, L52 21-06500-00 L=5mm J505, J508, J515 21-06750-00...
  • 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, 07-90472-01 4K7, ±5%, 0805...
  • 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, 11-04101-00 Selector S711, S712, S713, S714, S716, S717, S718 CONNECTORS UL2468#26AWG,SCN 2.5A-7D plug,XHB CZ711--CB59 14-72507-01 2.5A-7Y connector,white L=250mm CZ705 13-22503-00...
  • Page 42 R717 07-10101-50 100Ω ±5% 1/6w R718, R744 07-10221-50 220Ω ±5% 1/6w LEDS D707 33-50565-02 SWITCHS S715 11-04101-05 IT-1102A-1160 CONNECTORS UL2468#26AWG,SCN 2.5A-6DW plug,XHB CB710——CZ710 14-72506-00 2.5A-6Y connector,white L=80mm HEADPHONE BOARD 01-72508-00 RESISTORS R458, R459 07-30101-04 100Ω 2W ±5% CONNECTORS JK41 17-02001-00 CK6.35-06 9P UL2468#26AWG,SCN 2.5A-3D plug,XHB CZ45——CB45...
  • 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 Self Taping Screws 61-024108-0 STB4X8, Self Taping Screws 61-023106-0 STB3X6 Self Taping Screws...
  • 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 AH VERSION ONLY(BLACK) MAIN TRANSFORMER A18-72515-10 TD-120-0150K MAIN TRANSFORMER or A18-72515-30 ETO08230...
  • Page 45 LP-21 & H03VVH2-F 2×0.75mm2 & VH3.96- AC CORD(EURO) JA15-02251-24 3PIN 2VTJ1 & H03VVH2-F 2×0.75mm2 & VH3.96- AC CORD(EURO) or A15-02251-25 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) 80-123002-0 SECC-N5 T=1mm Rear Panel(C)
  • Page 46 61-084106-2 STPW4X6 Volume Knob 73-020002-1 Tone Knob 73-020001-1 Volume Knob Bezel 77-091013-1 Selector Knob 75-047011-2 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 74-123011-1 ABS 765B,TI Power Button 74-123013-1 ABS 765B,TI POWER BUTTON BEZEL...

  • Page 47: Exploded View

    C725BEE,E, P, , DED,VIEWS T001 S002 S016 S014 S015 C007 S022 C006 R006 S005 C005 C011 R005 C010 C004 C009 C008 S007 S016 R001 S018 S013 R007 C003 S019 M006 S017 S012 C012 M001 P001 P002 C013 S011 S005 P003 S007 S008 S009...

  • Page 48: Exploded View Parts List

    C725BEE,E, P, , DED,,VIEW,,PARTS,,, IST REF.N, PART,N, . DESCRIPTI, N Qty. REF.N, PART,N, . DESCRIPTI, N Qty. C001 66-123001-1 Chassis R004 01-72505-10 RS232,Board AH:1 C002 66-047003-0 Base,Cover 01-72505-20 RS232,Board C003 66-001010-0 THANSBracket R005 A11-01101-03 Rock,S, itch C004 67-091003-0 Shielding,Box R006 A84-001002-0 Relief,Bushing C005 A18-72515-10 Transformer...

  • Page 49: C725Bee Packing Accessory And Parts List

    C725BEE Packing Accessory Section REF.N0 Part No. Description Qty. 00-72500-10 C725Bee AH Version AH:1 00-72500-20 C725Bee C Version 00-72500-30 C725Bee CT Version CT:1 00-72500-30 C725Bee AHT Version AHT:1 90-005002-3 Non-Woven Cloth 90-005001-0 Polybag 89-005002-5 Polyfoam End Cap(2) 89-005001-6 Polyfoam End Cap(1) JA15-10121-16 AC Cord AH/AHT:1...
  • Page 50 © NAD 2008 NAD ELECTRONICS LTD TORONTO...

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