NAD M4 Service Manual
  1. Manuals
  2. Brands
  3. NAD Manuals
  4. Tuner
  5. M4
  6. Service manual

NAD M4 Service Manual

Hide thumbs Also See for M4:
Table of Contents

Advertisement

Quick Links

Download this manual
M4
C/AH
STEREO
FM/AM/DAB/XM TUNER

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the M4 and is the answer not in the manual?

Questions and answers

Related Manuals for NAD M4

Summary of Contents for NAD M4

  • Page 1 C/AH STEREO FM/AM/DAB/XM TUNER...
  • Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...

  • Page 3: Table Of Contents

    SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS ..... SERVICING PRECAUTIONS ................• General Servicing Precautions • Insulation Checking Prodedure • Electrostatically Sensitive Devices SPECIFICATIONS ................... 1-4,5...

  • Page 4: Product Safety Servicing Guidelines For Audio Products

    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

    SERVICING PRECAUTIONS CAUTION Before servicing the Stereo Tuner 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. Such components commonly are circumstances create conflict between the following servicing called Electrostatically Sensitive (ES) Devices.

  • Page 6: Specifications

    SPECIFICATIONS AM TUNER SECTION Usable Sensitivity (999/1000kHz) 30dBμ S/N Ratio (5mV in) 38dB THD (5mV in) <3% IF Rejection (450kHz) >36dB Image Rejection (F+2xIF) 28dB Selectivity 17dB Output 130mV ±20mV Loop Sensitivity (20dB S/N) 999/1000 kHz 66 dB 603/600 kHz 66 dB 1404/1400 kHz 66 dB...
  • Page 7 Mono 0.20% Stereo 0.25% Auto-Search Sensitivity On 24dBμ Sensitivity Off 15 dBμ RDS Decode Sensitivity 25 dBμ DAB SECTION Band lll 174MHz-240MHz Input 50 Ohm, nominal Max signal ~ -3dBm Sensitivity ~ -96dBm Adjacent Channel Rejection ~ 35dB Display 2-line by 16-character DOT Matrix Audio Output Stereo 2.5Vp-p...
  • Page 8 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS ................. . 2 - 2 1.
  • Page 9 M4 EXPLODED VIEWS...
  • Page 10 M4 Packing Accessory Section AC Cord Accessory Box Batteries REMOCON AM Antenna DAB Antenna Polyfoam(up) polyfoam(down) Gift Box Shipping Box...
  • Page 11 M4 EXPLODED VIEW PARTS LIST REF.NO. PART NO. DESCRIPTION Qty. REF.NO. PART NO. DESCRIPTION Qty. C002 01-50404-10 XM BOARD(AH) 01-50403-20 DAB BOARD includes DB1 ( C ) C003 01-54245-20 C425 Main Board(AH Version) S001 61-023206-1 Self Taping Screw (BTB3X6) 01-54245-10 C425 Main Board(C Version)
  • Page 12 SECTION 3 ELECTRICAL CONTENTS ELECTRICALTROUBLESHOOTING GUIDE…………………………………..3-2 1. Power check flow……………………………………………………………………………...3-2 2. Preamp operation flow……………………………………………………..…………………3-3,4 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 18.432MHz CLOCK…………………………………………………...…..………3-5 2. M30281 reset in low active…………………………………………………………………...3-5 3. I2C control SDA and SCL…………………………………………………………………….3-6 4. DAB/XM control RXD……………………………………………………………………….…3-6 BLOCK DIAGRAMS…………………………………………………...…………..3-7 CIRCUIT DIAGRAMS 1.

  • Page 13: Electricaltroubleshooting Guide

    ELECTRICAL TROUBLESHOOTING GUIDE 1.Power Check Flow Power switch on Orange LED ON? 5V is Right ? Check the MCU on the FPP board Check Q300--Q303,U302,U303 Press the standby button Check the cable from J300 to J105 Check the MCU on the FPP board Check Q112,Q600 and K600 Hear the relay’s click? Check if the main transformers...
  • Page 14 2. Operation flow Power on Orange LED change to Check FPP board blue? Wait for 10 second Check 5.3V relay supply Hear the relay’s click? Check Q101 Check SOURCE SELECT signal Press band key to change source FM,AM,DAB/XM mode Relay respond properly? Press band key to select AM mode, input AM test signal 1K 500mV sinewave at antenna...
  • Page 15 Press band key to select DAB(or XM) mode, input DAB (XM) test signal 1K 500mV(0dBFS) sinewave at antenna side,check output Check U104 input IIs signal DAB:Level=500mV±50mV Check U105 U106 U107 U108 THD<0.03%? check DB1 module XM: Level=2V±0.1V THD<0.03%? Press band key to select AM mode, input AM test signal 1K 500mV sinewave at antenna side,check output...

  • Page 16: Details And Waveforms On System Test And Debugging

    DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 18.432MHz CLOCK 2. M30281 reset in low active...

  • Page 17: I2C Control Sda And Scl

    3. I2C control SDA and SCL 4. DAB/XM control RXD...
  • Page 18 M4 BLOCK DIAGRAM ANALOG OUTPUT FM/AM SECTION C425 BOARD XM SECTION (AH VERSION ONLY) XM BOARD IIS SIGNAL ANALOG OUT L AUDIO DAC PCM1796 ANALOG OUT R MAIN MCU M30281FAHP IIS SIGNAL DAB SECTION (C VERSION ONLY) NAD DB1 MODULE...

  • Page 19: Circuit Diagrams

    CIRCUIT DIAGRAMS 1.MAIN BOARD DIG SECTION...

  • Page 20: Main Board Psu Section

    CIRCUIT DIAGRAMS 2.MAIN BOARD PSU SECTION...

  • Page 21: Front Panel Board

    CIRCUIT DIAGRAMS 3.FRONT PANEL BOARD 3-10...

  • Page 22: Dab Board (C Version Only)

    CIRCUIT DIAGRAMS 4. DAB BOARD (C VERSION ONLY) J401 C417B R405 NC 100N SPDIF DGND R427 C417C DAB_TX U400 DGND C417A 100N CS8416 100R R406 47K C404 100N C411 C406 R422 100N DAB_RX L400 R408 100R DAB_LRCLK 10uF/10V RXP3 OLRCK 100N 10UH R409 100R...

  • Page 23: Printed Circuit Diagrams

    R196 R138 R620 R195 C602 R619 J111 C613 C601 R618 R617 2007 C COYPRIGHT NAD ELECTRONICS C606 M4 MAIN BOARD VM1.0 F600 230V : T250mAL/250V F606 230V : T500mAL/250V C605 120V : T500mAL/250V 120V : T1AL/250V L600 230V J604 120V...

  • Page 24: Front Panel Board

    PRINTED CIRCUIT DIAGRAMS 2. FRONT PANEL BOARD TOP BOTTOM C309 C307 R328 3-13...

  • Page 25: Dab Board (C Version Only)

    PRINTED CIRCUIT DIAGRAMS 3. DAB BOARD (C VERSION ONLY) R435 R436 C403 L400 C414 R419 D400 C409 C421 C407 U402 R417 R411 R432 R433 C408 R428 U403 C429 R402 C416 R426 R425 R424 R423 C405 3-14...

  • Page 26: Xm Board (Ah Version Only)

    PRINTED CIRCUIT DIAGRAMS 3. XM BOARD (AH VERSION ONLY) C523 R543 D505 D506 C509 C522 3-15...

  • Page 27: Am Fm Tuner Board Ah & C

    PRINTED CIRCUIT DIAGRAMS 4. AM FM TUNER BOARD AH & C 3-16...
  • Page 28 SECTION 4 REPLACEMENT PARTS LIST MODEL: M4 C/AH(NAD) RUN DATE:HS40-M4_B17VM1.8 00-50400-10 AH VERSION 00-50400-20 C VERSION 01-50401-10 MAIN BOARD 01-50401-20 MAIN BOARD 02-50401-00 MAIN BOARD ...3 × DIODE ...3 33-40352-01 DIODE 1SS352 D105, D106, D107, D108, D109, D110 SOD-323 ...3 c t i ...3...
  • Page 29 ...3 07-90332-00 Chip Resistor 0603,3.3KΩ, ±5% R165, R166, R167, R169 0603 R107, R108, R109, R110, R111, R118, R125, ...3 07-90472-00 Chip Resistor 0603,4.7KΩ, ±5% 0603 R180, R181, R182, R183, R136, R137,R218 R139, R140,R141, R142, R194,R103, R119, ...3 07-90103-00 Chip Resistor 0603,10KΩ, ±5% 0603 R120, R129...
  • Page 30 Alu Electrolytic 06-10051-03 CD110,10uF, 50V, ±20% C608, C625, C626 Pitch=2.5mm Capacitor Alu Electrolytic 06-22051-01 ± c t i Capacitor Alu Electrolytic 06-47011-08 Capacitor Alu Electrolytic 06-10111-00 CD110,100uF, 16V, ±20% C609, C630, C623, C624 Pitch=5mm Capacitor Alu Electrolytic 06-22221-01 CD263,2200UF/25V,±20% C614, C615 PITCH=7.5MM Capacitor Alu Electrolytic...
  • Page 31 ...3 07-90101-00 Chip Resistor 100Ω ± ...3 07-90000-00 Chip Resistor 0Ω ± R300, R301, R302, R303, R304, R305, R306, ...3 07-90103-00 Chip Resistor 10KΩ, ±5% R308, R309, R310, R311, R313, R314, R323, 0603 R324, R325, R326 ...3 07-91009-01 Chip Resistor 10Ω...
  • Page 32 R407, R408, R409, R410, R423,R424, R425, ...3 07-90101-00 Chip Resistor 100Ω, ±5% 0603 R426, R400, R418, R422, R402, R429 ...3 07-90910-00 Chip Resistor 91Ω ± ...3 07-90331-00 Chip Resistor 330Ω ± ...3 07-93001-00 Chip Resistor 3KΩ ± ...3 07-90103-00 Chip Resistor 10KΩ...
  • Page 33 CONNECTOR SMD20*1.0mm ...3 CONNECTOR Metal Parts × ( t f Mechanical Parts others A18-50420-00 R Type Transformer R20-E9328G A18-50407-00 standby Transformer TD050-E103A A14-53002-12 Wire red L=50mm ± ± ± A15-10125-00 AC Cord(AH Version) T582-AH AH:1 A15-10250-00 AC Cord(C Version) X-T562-C-LF A15-10250-03 X-CCC BC:1...
  • Page 34 61-024108-0 Self Taping Screw STB4×8 61-063106-0 Self Taping Screw STF3×6 61-023616-0 Self Taping Screw TBBT3×16 61-224508-1 Machine Screw GB/T70.1, 4X8 61-224512-1 Machine Screw GB/T70.1, 4X12 61-022506-6 Machine Screw MB2.5×6-Ni ACCESSARIES 87-048002-0 Button Pad NWC White 87-048003-0 Power pad NWC White 86-010004-0 3mm Rubber Pad 10×25×3mm...

This manual is also suitable for:

M4 c/ah

Table of Contents