NAD-D3020-int-sm维修电路原理图.pdf

NAD SERVICE MANUAL D3020 Hybrid Digital Amplifierr RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION PAGE SERVICE CAUTION.3-4 SPECIFICATIONS.5 WIRING DIAGRAM.6 BLOCK DIAGRAM. .7-10 .12-21 PCB LAYOUT.22-29 ELECTRICAL PARTS LIST.30-50 EXPLODED VIEWS 51-52 EXPLODED VIEW PARTS LISTS 51-52 CIRCUIT DIAGRAMS TROUBLE SHOOTING GUIDE.11 RadioFans.CN 收音机爱 好者资料库 PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURERS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM AC LINE SHOCK. SAFETY CHECKS AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. A CHECK SHOULD BE MADE OF THE FOLLOWING. SUBJECT : FIRE CONNECT A 1500 OHM 10 WATT RESISTOR, PARALLELED BY A .15 MFD, 150V AC TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE AC VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE AC PLUG AND REPEAT AC VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY. SUBJECT : GRAPHIC SYMBOLS SUBJECT : TIPS ON PROPER INSTALLATION 1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW. 2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS WHERE STEAM LEAKAGE IS A FACTOR, ETC. 3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION. 4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS. 5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED. 6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CARPETS. 7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER SCREEN SIZE. 8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY. THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” WITHIN THE PRODUCTS ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE. 3 RadioFans.CN 收音机爱 好者资料库 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 this publication, always follow the safety precautions. Remember Safety First: General Servicing Precautions 1. Always unplug the A/V Receiver AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board, module, or any other assembly. (2) Disconnecting or reconnecting any internal electrical plug or other electrical connection. (3) Connecting a test substitute in parallel with an electrolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Do not spray chemicals on or near this A/V Receiver or any of its assemblies. 3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cottontipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required. 4. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might be equipped. 5. Do not apply AC power to this A/V Receiver and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. 6. Always connect test instrument ground lead to the appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last. Insulation Checking Procedure Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1M-ohm. Note 1 : Accessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc. Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical Es devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an antistatic solder removal device. Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices. 5. Do not use freonpropelled chemicals. These can generate electrical charge sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material). 7. lmmediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handing unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.) 4 RadioFans.CN 收音机爱 好者资料库 * Gross dimensions include extended buttons and rear panel terminals. * Non-metric measurements are approximate. NAD Electronics will not assume any liability for errors being made by retailers, custom installers, cabinet makers, or other end users based on information contained in this document. Note: Installers should allow a minimum clearance of 55mm for wire/cable management. Specifi cations AUDIO SPECIFICATIONSD 3020 Rated Power at 8 ohms2 x 30 Watts IHF Dynamic Power 8 ohms2 x 65 Watts 4 ohms2 x 105 Watts 2 ohms2 x 150 Watts Signal/Noise Ratio (A-weighted)90dB Channel Separation 1kHz 10kHz 75dB 65dB Channel Balance0 0.3dB Frequency Response (20Hz - 20kHz)0dB to -0.3dB Total Harmonic Distortion0.005% Maximum input level5V IMD (SMPTE)0.02% IMD (CCIF)0.003% GENERAL SPECIFICATIONS Standby Power0.5 Watts Supports bit rate/sample rateup to 24/192 (via Digital Audio input) up to 24/96 (via Computer/Type B USB input) Unit Dimensions (W x H x D) Gross* 58 x 186 x 219mm 2 5/16 x 7 3/8 x 8 5/8” * Net Weight1.38kg (3.05lb) Shipping Weight2.1kg (4.6lb) 5 RadioFans.CN 收音机爱 好者资料库 6 RadioFans.CN 收音机爱 好者资料库 COAX OPTO NJW1194 Volume CONTROLER R CH OP TRIG IN LOGIC MAIN PSU Standby PSU(PI LNK624) 5V 1A MAIN L MAIN N Main MCU PIC24F64GB106 BLOCK DIAGRAM Plug in senser SPDIF SPDIF VOLUME GPIO IR FRONT PANEL CONTROL standby (<0.2W dissipation ) PSU BOARD 3.5MM jack(OPTO+ANA) SPDIF Digital Volume IIS IIS 2X50W 4ohm UCD102 AMP BUFFER AC INLET LP LN RP RN SPI I2C GPIO USB USB USB AUDIO TAS1020 LED STBY FPP BOARD IIS SWITCH NC7SV157 X 7 IIS Rail Detection 32V5 ON AC DET USB SWITCH TS3USB221 USB FOR Service I2C SPI SPI LDO AMS1117 3V3S LDO 7805 5VA 3V3D 3V3S 3V3D 3V3D 3V3D 3V3D L CH OP 2X35W 8ohm Gain 13.5dB Clipping control NE5532 LP RP HP OUT NE5532 HP OUT +/-12V Analog in RCA Bluetooth Module UART NAD design SPI 5VA 3V3D LPF NE5532 2X L 10A Peak(half cycle ) 7815/7915 +/-20V +/-15V LM317/337 +/-7V +15V CP +/-7V +/-7VCS42528 Codec Digital audio receiver ADC R DAC4 ADC LDAC 6 DAC 1 DAC 3 DAC 5 DAC 7 DAC 2 DAC 0 IIS IIS Analog Gain GPIO SOURCE Signal detect 1XTL084 L&R Signal det TONE Control Clipping Control 1XTL084 +/-35V Current sense 12VDR -20V(VDR) +/-20V 0.2A LDO AMS1117 MOS-switch APM2313 GPIO 5VS 5VS 5VD BASS ON 5VD IIS MUTE CRYSTAL 6MHz CRYSTAL 22.5792MHz CRYSTAL 24.576MHz Switch Frequency 500KHz 7 RadioFans.CN 收音机爱 好者资料库 RST RXP0 RXP1/GPO1 AD0/CS SCL/CCLK SDA/CDOUT AD1/CDIN VLC AOUTA1+ AOUTA1- AOUTB1+ AOUTA3+ AOUTA3- AOUTA2- AOUTB2- AOUTA2+ AOUTB2+ AOUTB1- AOUTB3+ AOUTB3- AOUTA4+ AOUTA4- AOUTB4+ AOUTB4- AINL+ AINL- AINR+ AINR- FILT+ REFGND VQRef ADC#1 ADC#2 Digital Filter Digital Filter Gain & Clip Gain & Clip CX_SDOUT ADCIN1 ADCIN2 CX_SCLK CX_LRCK CX_SDIN4 CX_SDIN3 CX_SDIN2 CX_SDIN1 VLS SAI_LRCK SAI_SCLK SAI_SDOUT DGNDVD OMCK RMCK LPFLTTXP INT Rx Clock/Data Recovery S/PDIF Decoder DEM Serial Audio Interface Port C&U Bit Data Buffer Control Port DAC#1 DAC#2 DAC#3 DAC#4 DAC#5 DAC#6 DAC#7 DAC#8 Digital Filter VoluCemontrol DGND RXP2/GPO2 RXP3/GPO3 RXP4/GPO4 RXP5/GPO5 RXP6/GPO6 RXP7/GPO7 VD MUTEC GPO MUTE Analog Filter VARXAGND ADC Serial Data AGND VA Internal MCLK CODEC Serial Port Mult/Div Format Detector CS42528 PREAMP BOARD 8 RadioFans.CN 收音机爱 好者资料库 In A1 In A2 In A3 In A4 In B1 In B2 In B3 In B4 Bias TONE TONE Bch Tone Filter V+ GND VOut Ach Tone Filter V- ADR0 ADR1 DATA CLOCK HCTAL Control Logic Zero Cross Detection OutB OutA NJW1194 PREAMP BOARD 9 RadioFans.CN 收音机爱 好者资料库 8052 Core I2C Control 8K ROM 6016 Byte RAM USB Serial OSC PLL ACG Suspend /Resume Logic I2C Bus CPort Port3Port1 USB SOF 6 MHz Interface Engine CODEC Interface 1520 Byte SRAMUBMDMA Global Control/Status Registers TAS1020APFB PREAMP BOARD 10 RadioFans.CN 收音机爱 好者资料库 TROUBLESHOOTING GUIDE Connect AC Cord from D3020 IS THE AMBER LED LIGHTED? NO YES IS IT RED? CHECK THE 5V SUPPLY CIRCUIT CHECK THE LED CONTROL CIRCUIT ,AND PROTECET CIRCUIT YES THE UNIT WORK NORMALLY? CAN PRESSING STB TOUCH KEY MAKENO ARE ALL POWER SUPPLIES OK?CHECK THE 5V SUPPLY CIRCUIT NO YES IS THE AMBER LED WHITE? YES IS THE STANDBY SINGAL LOWCHECK THE PROTECT CIRUIT CHECK THE STANDBY CONTROL YES NO YES SOURCE KEY IS USELESS? YES CHECK MCU CONTROL CIRCUIT NO CHECK TOUCH BOARD AND THE CONNECTORS YES IS THE SPK OUT NORMAL? NO IS THE OUTPUT DC LEVEL NORMAL? CHECK PREAMP OUT DC OR UcD102 MODULE BROKEN? IS THERE SIGNAL OUTPUT? YES YES NO CHECK UcD102 MODULE IS UcD102 MODULE INPUTSEYON NORMAL? CHECK THE MUTE CONTROL IS THE MUTE SIGNAL OFF? YES CHECH NJW1194 AND PREAMP IS NJW1194 OUTPUT NORMAL? YES CHECK CS42528S FILTER CIRCUITIS CS42528 OUTPUT NORMAL? YES CIRCUIT NO NO NO NO AMP CIRCUIT CHECK CS42528 AND ITS INPUT CIRCUIT IS THE THD HIGH OR ABNORMALYES IS IT WHITE? CHECK TOUCH BOARD OR SOFTWARE ERROR WAVEFORM? OPEN THE UNIT FOR OVERALL CHECK IS IR NORMAL?CHECK THE IR CONTROL CIRCUIT IS Bluetooth NORMAL? CHECK Bluetooth CONNECTION OR MODULE IS 12V TRIGGER NORMAL? CHECK 12V OUT CONTROL CIRCUIT IS HEADPHONE O/P NORMAL? CHECK HEADPHONE CIRCUIT OR CONNECTION IS UP GRADE KEY NORMAL?IS BASS ON/OFF NORMAL? YES CHECK TRIG BOARD OR MCU CHECK BASS CONTROL CIRCUIT OK NO NO NO NO NO YES YES YES YESYES YES NO YES YES NO 11 RadioFans.CN 收音机爱 好者资料库 C379 100n R369 33R C378 4U7 R364 4R7 RX1 3V3DA R362 75R AGND RX0INPUT1 C357 100n X7R VCC 1 GND 2 DATA 3 J112 GP1FRX C362 1nF AGND 13 5 46 2 T300 SPDIF 1:1 AGND CX_SDIN1 1 CX_SCLK 2 CX_LRCK 3 VD 4 DGND 5 VLC 6 SCL/CCLK 7 SDA/CDOUT 8 AD1/CDIN 9 AD0/CS 10 INT 11 RST 12 AINR- 13 AINR+ 14 AINL+ 15 AINL- 16 VQ 17 FILT+ 18 REFGND 19 AOUTB4- 20 AOUTB4+ 21 AOUTA4+ 22 AOUTA4- 23 VA 24 AGND 25 AOUTB3- 26 AOUTB3+ 27 AOUTA3+ 28 AOUTA3- 29 AOUTB2- 30 AOUTB2+ 31 AOUTA2+ 32 AOUTA2- 33 AOUTB1- 34 AOUTB1+ 35 AOUTA1+ 36 AOUTA1- 37 MUTEC 38 LPFLT 39 AGND 40 VARX 41 RXP7/GPO7 42 RXP6/GPO6 43 RXP5/GPO5 44 RXP4/GPO4 45 RXP3/GPO3 46 RXP2/GPO2 47 RXP1/GPO1 48 RXP0 49 TXP 50 VD 51 DGND 52 VLS 53 SAI_SDOUT 54 RMCK 55 CX_SDOUT 56 ADCIN2 57 ADCIN1 58 OMCK 59 SAI_LRCK 60 SAI_SCLK 61 CX_SDIN4 62 CX_SDIN3 63 CX_SDIN2 64 * U303 5VA C305 220U/6V3 HCN C314 2.2U X5R 3V3D L302 742792662 3V3DA C366 22U 6V3 X5R C309 10N C310 100N C311 100N C300 10N C301 10N C302 10N AGND 5VDA AGND 5VDA AGND 3V3DA AGND AGND 3V3DA 3V3DA AGND AGND 3V3DA C303 100N 5VDA C304 10N C312 100N C313 100N 5VA 5VDA5VA AGND AGND AGND AGND AGND R322 750 R325 750 R326 750 R328 750 R333 750 R335 750 R337 750 R339 750 R340 750 R341 750 R346 750 R354 750 R355 750 R356 750 R357 750