NAD M3 C/AH Service Manual
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NAD M3 C/AH Service Manual

NAD M3 C/AH Service Manual

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© NAD 2006
M3 C/AH
NAD ELECTRONICS INTERNATIONAL
Integrated Amplifier
TORONTO

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  • Page 1 All manuals and user guides at all-guides.com © NAD 2006 M3 C/AH NAD ELECTRONICS INTERNATIONAL Integrated Amplifier TORONTO...
  • Page 2 All manuals and user guides at all-guides.com CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    All manuals and user guides at all-guides.com SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS ..... SERVICING PRECAUTIONS ................• General Servicing Precautions • Insulation Checking Prodedure • Electrostatically Sensitive Devices ALIGNMENT PROCEDURE ................1-4,5 • POWER DRIVEN VOLTAGE •...

  • Page 4: Product Safety Servicing Guidelines For Audio Products

    All manuals and user guides at all-guides.com PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS CAUTION : DO NOT ATTEMPT TO MODIFY THIS 5. NO LEAD OR COMPONENT SHOULD TOUCH A PRODUCT IN ANY WAY, NEVER PERFORM CUSTOM- RECIVING TUBE OR A RESISTOR RATED AT 1 WATT IZED INSTALLATIONS WITHOUT MANUFACTURER’S OR MORE.

  • Page 5: Servicing Precautions

    All manuals and user guides at all-guides.com SERVICING PRECAUTIONS CAUTION Before servicing the Stereo amplifier covered by Electrostatically Sensitive (ES) Devices this service data and its supplements and addends, read and Some semiconductor (solid state) devices can be damaged follow the SAFETY PRECAUTIONS. NOTE: if unforeseen easily by static electricity.

  • Page 6: Alignment Procedure

    All manuals and user guides at all-guides.com 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: Balance Inputs Cmrr

    All manuals and user guides at all-guides.com 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 Millivoltmeter to preout1R then adjust R564 for lowest output level.

  • Page 8: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS NAD M3 INTEGRATE AMPLIFIER Note: Specifications are measured in accordance with EIA Standard RS-490 (IHF A-202) for amplifiers Power Amplifier Section 180W (17dBw) Continuous output power into 4/8 ohms (Minimum RMS power per channel, both channels driven, With no more than the rated distortion) Rated distortion (THD)(20Hz –20kHz)
  • Page 9 All manuals and user guides at all-guides.com Signal-to-Noise ratio 110dB ref 500mV (A-weighted, line In, Pre-Out) Rated distortion (THD)(20Hz –21kHz) 0.005% Channel Separation 110dB (1kHz 2V Line/balanced IN, 2V Pre-Out) Input Sensitivity 320mV for 2V out Input Overload Line input Balanced input <...
  • Page 10 All manuals and user guides at all-guides.com SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ................. . 2 - 2 1.

  • Page 11: Exploded Views

    All manuals and user guides at all-guides.com EXPLODED VIEWS 1. Cabinet and main frame section S010 S016 C012 C011 PR06 R006 R009 R007 R008 R010 R011 T001 C013 S011 S009 R005 R004 C014 A006 S008 C018 C019 PR01 S013 C004 S001 C015 C024...

  • Page 12: Packing Accessory Section

    All manuals and user guides at all-guides.com 2. Packing accessory section P015 P012 P013 P011 P014 P016 P010 P009 P008 P006 P005 P007 P004 P003 P002 P001...

  • Page 13: Exploded View Parts List

    All manuals and user guides at all-guides.com 3. Exploded view parts list REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty. C001 C002 R001 C003 01-50306-02 RAMP Board Assy 67-048024-0 Rear Panel CCC C004 R002 01-50306-01 LAMP Board Assy 01-50308-02 SPK Board R C005 01-50305-00 Power Board Assy R003...
  • Page 14 All manuals and user guides at all-guides.com REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty. S011 61-023212-0 Screws, BTB3×12 S012 62-050302-0 PEM NUT-PCB M3×0.5 S013 61-223506-1 Hex Screws w/Tooth washer S014 61-223514-0 Hex Screws 3×14 S015 61-023106-0 Screws, STB3×6 S016 61-373506-0 Machine Screws M3×6 S017...
  • Page 15 All manuals and user guides at all-guides.com SECTION 3 ELECTRICAL CONTENTS ELECTRICALTROUBLESHOOTING GUIDE 3-2,3 1. Power check flow 3-4,5 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.
  • Page 16 All manuals and user guides at all-guides.com ELECTRICAL TROUBLESHOOTING GUIDE 1.Power Check Flow Power switch on Amber LED ON? 5V is Right ? Check the MCU on the keyboard Check U84 and Q82 Press the standby button Check the D81 Check the MCU on the keyboard Check Q91 Q92 and OP91 Hear the relay’s click?
  • Page 17 All manuals and user guides at all-guides.com Check R646 R647 R746 R747 R622 +72V Check B606 B706 power supply is correct? Check Q609 Q610 Q611 Check the PCB track -72V Check R623 power supply is correct? Check Q612 Q613 12V on the Check Q990 Q991 preamp relayis correct? Check D990 D991...
  • Page 18 All manuals and user guides at all-guides.com 2.Preamp operation flow Power on Amber LED change to Check FPP board blue? Wate for 10 second Check 24V relay suply Hear the relay’s click? Check U113,U108,U213,U208 Check HCLK,HDATA,FUNC signal Press listen,mode,biamp key to change input and out put mode Relay respond properly?
  • Page 19 All manuals and user guides at all-guides.com Press Tone Key to change tone setting,measure preout response Check U112,±17V at tone board Response change properly? Check TONE_STB,OPSEL_DATA OPSEL_CLK signal Press Z-2/record key to current input channel then measure output level and THD Check U109 U209 U111 U211 Level=2V±0.1V Check OPSEL_STB signal...
  • Page 20 All manuals and user guides at all-guides.com DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 11MHz CLOCK 2. AT89C51 reset is high active.
  • Page 21 All manuals and user guides at all-guides.com 3.volume control DATA and CLOCK 4.REC(ZONE) select DATA and CLOCK...
  • Page 22 All manuals and user guides at all-guides.com 5.Input select DATA and CLOCK...
  • Page 23 All manuals and user guides at all-guides.com BLOCK DIAGRAMS 1. POWER DISTRIBUTE DIAGRAM L CHANNEL INPUT RELAYS ON PREAMP L CHANNEL OUTPUT RELAYS ON L AMP BALANCE AMP ON BAL ±20V RECTIFY ±20V REGULATOR B605 B606 ON PSU ON PSU PRE AMP ON PRE AMP ±72V RECTIFY...
  • Page 24 All manuals and user guides at all-guides.com 2. PREAMP SIGNAL PATH LEFT CHANNEL 5dB TONE CONTROL 2,2.5,3,3.5dB SELECTABLE GAIN 30dB ATTENUATOR INPUT SELECTOR 0/6.5dB SELECTABLE GAIN 54dB ATTENUATOR DISC AMP STAGE 10dB/STEP 2dB/STEP 1dB/STEP AMP STAGE PRE OUT1 TUNER INPUT4 INPUT5 BIAMP HIGH PASS FILTER BY PASS, 40, 60, 80, 100Hz...
  • Page 25 All manuals and user guides at all-guides.com 3. SYSTEM CONTROL PATH P0.0 P0.1 ENCODE 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 EEPROM P2.2 KEYS P2.3 P2.4 P2.5 P2.6 P2.7 P3.0 U83 MAX3221 (FPP) RJ45 RS232 SOCKET (REAR PANEL) P3.1 P3.2...
  • Page 26 All manuals and user guides at all-guides.com CIRCUIT DIAGRAMS 1.POWER AMPLIFIER BOARD R395 4K7/3W FP B301 +V24R R348 R370 THERMAL BREAKER D340 +72V +V74 Q308 D316 D317 D318 C309 R375 1N4148 R325 2SC1815 1N4148 +74V R334 R337 R366 R398 R369 0.1uF R309 4K7/3W FP...
  • Page 27 All manuals and user guides at all-guides.com 2. PREAMP BOARD HDATA2 VOLA2 HDATA HCLK VOLA +20VR OPSEL_CLK 24VR 24VR 24VR 24VR 24VR 24VR 24VR 24VR 24VR 24VR 24VR 24VR +18VR 2C48 +20VR +20VR OPSEL_DATA 2Q23 2Q16 OPSEL_STB RL207C RL208C RL209C RL210C RL211C RL212C...
  • Page 28 All manuals and user guides at all-guides.com B901 C905 AMS1117-5.0 0.1uF/50V C901 C907 C908 Standby C903 0.1uF/50V 0.1uF/50V 100uF/10V 2200uF/16V CZ908 DF1501S B902 CON4 C902 R Core 10VA Transformer 0.1uF/50V C906 0.1uF/50V C904 DF1501S 1000uF/25V CZ902 CON4 to HS4-M3-B007 PSU VC4.0.SCH CZ74 CZ905 CZ904 CON5...
  • Page 29 All manuals and user guides at all-guides.com 4. ENCODER AND CONNECT BOARD EC16B243040F 0.1U ECZ1 0.1U CON4 0.1U 0.1U 0.1U ENCODE BOARD CZ97 Q990 C2983 C990 -24VL +24VL R990 CZ94 TONE VOLA 5.6K -24VR D990 VOLL_CLK 1OU/35V +24VR C991 VOLL_DATA 100N VOLL_STB ZEROL...
  • Page 30 All manuals and user guides at all-guides.com 5. FRONT PANEL BOARD U810 M3 VFD S820 NAD M3 RESET CZ81 C832 R843 0.1U CON4 R839 C823 CON2 RESET 0.1uF C815 C821 S811 S814 S817 0.1u 0.1U 2listen 1standby 10K X 8...
  • Page 31 All manuals and user guides at all-guides.com 6. BALANCE INPUT BOARD JIRA1 IR IN JIRB2 +20VR CZ501 U52B U52A IR OUT1 JIRB1 10n/63V -20VR IRout IR in 0.1uF IR OUT2 74HCU04 74HCU04 232t RS232 232r R501 100 trigger+ trigger- -20VL Q536 R502 100 R572...
  • Page 32 All manuals and user guides at all-guides.com 7.POWER BOARD TO STB_SCH CZ902 CZ71 CZ74 DGND TRIGGER+ TRIGGER- SW SPST CON4 CON3 CZ72 TO STB_SCH CZ906 IR IN IR OUT DGND TRIG+ TXD1 RXD1 SPK A SPK B 2SA1015 OP91 OPSEL CLK 2SA1015 OPSEL DATA OPSEL STB...
  • Page 33 All manuals and user guides at all-guides.com PRINTED CIRCUIT DIAGRAMS 1. Preamp Main board(PREM) 2C48 J206 1R47 2C37 2C35 2C40 2C38 1C38 1C39 1C35 1C37 1C47 2C47 2C36 2R45 2C39 2R42 2R41 2R38 1C40 1C36 1R48 1R101 J106 1Q28 1Q22 2Q18 1Q14 2Q14...
  • Page 34 All manuals and user guides at all-guides.com 2. Preamp LCH input board(PREL) J208L J108L 1Q24 1R54 LRCA2 LRCA3 LRCA6 Q131 C101 1Q23 LRCA8 R101 C135 R104 C122 R190 C121 R106 Q130 R189 C137 1R62 C103 C106 C125 C105 C115 1R57 C116 C133 1R58...
  • Page 35 Q601 TP701 Q705 TP601 CZ73 CZ75 P704 P604 C721 D603 D702 D602 D703 B704 B703 B604 B603 2005 C COYPRIGHT NAD ELECTRONIC P703 P603 HEARSINK HEATSINK HEATSINK HEATSINK M3 PSU VM1.0 C720 C622 C723 C623 P702 P602 P601 P701 CZ71...
  • Page 36 All manuals and user guides at all-guides.com 5. Balance amplifier board(BAL) CZ501 Q536 U51 Q538 M3 BALANCE VM1.0 2004 C COYPRIGHT NAD ELECTRONIC Q523 Q531 Q516Q525 C532 R556 R570 C535 Q521 C529 C526 Q520 Q533Q534 Q510Q511 C534 R534 R539 R549...
  • Page 37 Top layer Bottom layer D991 7. Encoder board(ENC) Top layer Bottom layer 8. Speaker board(L/R SPK) RSPK LSPK Top layer Bottom layer Top layer Bottom layer C COYPRIGHT NAD ELECTRONICS C COYPRIGHT NAD ELECTRONICS HS4-M3-B007 RSPK VM1.0_pcb HS4-M3-B007 LSPK VM1.0_pcb CZS2 3-23...
  • Page 38 All manuals and user guides at all-guides.com 9. Front pannel board(FPP) Top layer Bottom layer C813 C837 C836 C834 C833 R853 R851 R850 R844 C811 R836 S820 R835 R833 3-24...
  • Page 39 All manuals and user guides at all-guides.com 10. Standby board bottom(STBB) Top layer Bottom layer CZ908 CON4 C902 C901 C908 CZ902 3-25...
  • Page 40 All manuals and user guides at all-guides.com 11. Standby board top(STBT) Top layer Bottom layer 3-26...
  • Page 41 All manuals and user guides at all-guides.com 12. L channel amplifier PCB (AMPL) Top layer Bottom layer R354 IC303 Q325 3-27...
  • Page 42 All manuals and user guides at all-guides.com 13. R channel amplifier PCB (AMPR) Top layer Bottom layer D422 D423 D424 D425 IC403 R454 3-28...
  • Page 43 All manuals and user guides at all-guides.com 14. Preamp Module board(MOD) Top layer Bottom layer 3-29...
  • Page 44 All manuals and user guides at all-guides.com SECTION 5 REPLACEMENT PARTS LIST NOTES: Warning Parts that are shaded are critical With respect to risk MODEL :M3 C/AH(NAD) of fire or electrical shock. RUN DATE : HS4-M3_B013_VM2.6 C VERSION P/N 00-50300-20 AH VERSION P/N 00-50300-10...
  • Page 45 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 3.5PHONE 17-02001-04 ST-323B-04/CKX-3.5-02-3P PJ1, JIRA1, JIRB1, JIRB2 PHONE1 JACK1 3.5PHONE or17-02001-03 SCJ349P00×S0B01 PJ1, JIRA1, JIRB1, JIRB2 PHONE1 JACK1 16-53001-00 MULTI PCB FR-4, 1.6mm, 200mm×80mm …3 16-53010-00 FR-4, 1.6mm, 170mm×320mm MECHANICAL PARTS 66-011011-0 Connectible Bracket...
  • Page 46 All manuals and user guides at all-guides.com Description Part Type Designator Footprint ENCODE 37-16243-00 ENCODE EC16B243040F ENCODE CAPACITORS 26-10451-01 Ceramic Chip Capacitor 0.1uF, 50V, +80%-20% EC1, EC2, EC3, EC4, EC5, 0805 RESISTORS 07-90221-01 Chip Resistor 220 , 1/8W, ±5% ER2, ER3 0805 07-90103-01 Chip Resistor...
  • Page 47 All manuals and user guides at all-guides.com Description Part Type Designator Footprint P/N:01-50306-01 LAMP BOARD DIODE D303, D304, D305, D306, D323, D325, 33-44148-03 Switch Diode 1N4148 Pitch=10mm D317, D318, D320, D321 D311, D312, D313, D314, D315, D326, 33-44148-02 Switch Diode 1N4148 Pittch=7.5mm D340...
  • Page 48 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 07-20180-60 Metal Film Resistor 18 , 0.6W, ±5% R337, R329 Pitch=10mm 07-22109-10 Metal Film Resistor 21 , 1/4W, ±1% R317 Pitch=10mm 07-20330-10 Metal Film Resistor 33 , 1/4W, ±5% R308, R320 Pitch=10mm 07-20820-10...
  • Page 49 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 33-44148-02 Switch Diode 1N4148 D411, D414, D415, D426, D440 Pitch=7.5mm D403, D404, D405, D406, D412, D413, 33-44148-03 Switch Diode 1N4148 Pitch=10mm D417, D418, D420, D421, D423, D425 33-40021-03 Switch Diode BAV21 D407, D408, D409...
  • Page 50 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 07-20301-10 Metal Film Resistor 300 , 1/4W, ±5% R428 Pitch=10mm 07-20471-10 Metal Film Resistor 470 , 1/4W, ±5% R401 Pitch=10mm 07-20681-10 Metal Film Resistor 680 , 1/4W, ±5% R453 Pitch=10mm 07-20102-10...
  • Page 51 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 33-16809-01 Zener Diode 6.8V, 1/2W D614, D714 Pitch=10mm 33-25404-03 Rectifier Diode 1N5404 D604, D704 Pitch=17.5mm …3 33-25404-00 Rectifier Diode 1N5404, Taping D604, D704 DO-27 33-60116-00 Thyristor BT151-500R D602, D603, D702, D703 TO-220 33-30142-00 Rectifier Bridge...
  • Page 52 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 07-26202-10 Metal Film Resistor 62K , 1/4W, ±1% R658, R758 Pitch=10mm 07-20104-10 Metal Film Resistor 100K , 1/4W, ±5% R656, R756 Pitch=10mm 07-20154-10 Metal Film Resistor 150K , 1/4W, ±5% R667, R767 Pitch=10mm 07-20224-10...
  • Page 53 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 85-008001-1 Spacer Support PMB-1 61-023208-0 Self Taping Screws BTB3×8, PCB INTERVAL(1) P/N:01-50309-00 PREM BOARD DIODE 1D12, 1D13, 1D14, 2D12, 2D13, 2D14, 2D01, 2D02, 2D03, 2D04, 2D05, 2D06, 33-44148-11 Switch Diode SMD LL4148 MINIMELF...
  • Page 54 All manuals and user guides at all-guides.com Description Part Type Designator Footprint 07-91509-01 Chip Resistor 15 , ±1% R131, R231 0805 07-91879-01 Chip Resistor 18.7 , ±1% R130, R230 0805 07-92329-01 Chip Resistor 23.2 , ±1% R229, R129 0805 07-92749-01 Chip Resistor 27.4 , ±1% R1002, R2002...
  • Page 55 All manuals and user guides at all-guides.com Description Part Type Designator Footprint PRE-BUSBAR R, 0.1u GOLD 69-048028-0 PRE-BUSBAR R H207 BUS BARD PLATED 16-53009-00 PREMAIN BOARD FR-4, 1.6mm, 150mm×240mm …3 16-53020-00 FR-4, 1.6mm, 220mm×250mm 01-50310-00 Line/Drive Amp PREAMP MODULE U101, U201 …3 01-50310-01 MODULE BOARD...
  • Page 56 All manuals and user guides at all-guides.com Description Part Type Designator Footprint RESISTOR 07-91009-01 Chip Resistor 10 , ±1% 1R51, 1R52 0805 07-91509-01 Chip Resistor 15 , ±1% 2R106, 1R106 0805 07-94879-01 Chip Resistor 48.7 , ±1% R156, R256 0805 07-95369-01 Chip Resistor 53.6 , ±1%...
  • Page 57 All manuals and user guides at all-guides.com Description Part Type Designator Footprint Metallized Polyester Film 25-22461-02 220nF, 63V, ±5% 1C60 Pitch=5mm Capacitor RESISTOR 07-90000-01 Chip Resistor 0 , ±5% 1R73 0805 07-92000-01 Chip Resistor 200 , ±1% 1R61,1R62, R189, R193 0805 07-92200-01 Chip Resistor...
  • Page 58 All manuals and user guides at all-guides.com Description Part Type Designator Footprint ….4 81-046006-0 SECC SECC-N4 396×1219×1.6 68-048001-1 HS Fixl Bar C45, HRC45, 66-005009-0 Tr. Clamping 66-018005-0 Tem. SW Clamper 65Mn HRC48-52, 66-001008-0 Metal Disc 68-048002-0 Shielding Box 70-048010-1 M3 Fascia 1 6063, T5 S70-048011-0 M3 Fascia 2...
  • Page 59 All manuals and user guides at all-guides.com Description Part Type Designator Footprint S88-048001-0 Shipping Box 635×625×320mm S88-048002-0 Gift Box 615×605×290mm 89-048001-0 M3Polyfoam-Bottom EPE, white,30g 89-048002-0 M3Polyfoam-Cap EPE, white,30g 89-048003-0 M3 Little Polyfoam A EPE, white,28-30g 89-048004-0 M3 Little Polyfoam B EPE, white,28-30g 88-043003-0 M15Accessories Box...

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