Nad-M-4-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL SERVICE MANUAL M4 C/AH NAD ELECTRONICSINTERNATIONAL TORONTO M4 C/AH FM/AM/DAB/XM TUNER M4 C/AH M4 STEREO FM/AM/DAB/XM TUNER STEREO FM/AM/DAB/XM TUNER STEREO NAD 2009 RadioFans.CN 收音机爱 好者资料库 CONTENTS SECTION 1 . . . .SUMMARY SECTION 2 . . . .CABINET CONNECT A 1500 OHM 10 WATT RESISTOR,

2、 PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT,ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLT- AGE ACROSS THE COMBINATION OF 1500OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE ME

3、ASURE- MENTS FOR EACH EXPOSED METALLIC PART. VOLT- AGE MEASURED MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE COR- RECTED IMMEDIATELY. THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATER

4、AL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “ DANGEROUS VOLTAGE” 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 SERVICE PERSONNEL TO THE PRESENCE OF I

5、MPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SERVICING PRECAUTIONS CAUTION:Beforeservicing theStereo Tuner 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 pre

6、cautions and any of thesafety precautions in this publication, always follow thesafety precautions. Remember Safety First: General Servicing Precautions 1.Always unplug theStereo Tuner AC power cord from the AC power sourcebefore: (1) Removing or reinstalling any component, circuit board, module, or

7、 any other assembly. (2) Disconnecting or reconnecting any internal electrical plug or other electrical connection. (3) Connecting a test substitutein parallel with an electrolytic capacitor. Caution:A wrongpartsubstitute orincorrectpolarity installation of electrolytic capacitors may result in an e

8、xplosion hazard. 2.Do not spray chemicals on or near this Stereo Tuner or a- ny 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 s

9、oft 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 Stereo Tuner and/or any of its elec

10、trical assemblies unless all solid-statedeviceheat sinks arecorrectly installed. 6.Alwaysconnecttestinstrumentgroundleadtothe appropriate ground before connecting the test instrument positivelead. Always removethetest instrument ground lead last. Insulation Checking Procedure Disconnect theattachmen

11、t plug from theAC outlet and turn the power on. Connect an insulation resistancemeter (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 1 M-ohm. Note 1: Accessible Conductive P

12、arts including Metal panels, Input terminals, Earphonejacks, 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

13、 areintegrated circuits and somefield 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 handing any semiconductor component orsemiconductor-equippedassembly

14、,drainoffany electrostatic chargeon your body by touching a known earth ground.Alternatively,obtainandwearacommercially available discharging wrist strap device, which should be removed for potential shock reason prior to applying power to theunit under test. 2.After removing an electrical assembly

15、equipped with ES devices, placetheassembly on a conductivesurfacesuch as aluminum foil, to prevent electrostatic charge buildup or exposureof theassembly. 3.Useonly a grounded-tip soldering iron to solder or unsolder ES devices. 4.Use only an antistatic solder removal device. Some solder removal dev

16、ices not classified a “ anti-static”can generate electrical charges sufficient to damageES devices. 5.Do not use freonpropelled chemicals. These can generate electrical chargesufficient to damageES devices. 6.Do not remove a replacement ES devicefrom its protective package until immediately before y

17、ou are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparableconductivematerial). 7.Immediately beforeremoving theprotectivematerial from the leads of a replacement ES device, touch the protective mater

18、ial to the chassis or circuit assembly into which the devicewill beinstalled. Caution: Besureno power is applied to thechassis or circuit, and observeall other safety precautions. 8.Minimizebodilymotionswhenhandingunpackaged replacement ES devices. (Normally harmless motion such as the brushing toge

19、ther of your clothes fabric or the lifting of your foot from a carpeted floor can generatestatic electricity sufficient to damagean ES device.) 1-3 AM TUNER SECTION Usabl e Sensitiv ity (999/1000kHz) 30dB S/ N Ratio (5mV in) 38dB THD (5mV in) 36dB Image Rejection (F+2xIF) 28dB Sel ectiv ity 17dB Out

20、put 130mV 20mV Loop Sensitivity (20dB S/N) 999/1000 kHz 66 dB 603/600 kHz 66 dB 1404/1400 kHz 66 dB Fr equency r esponse (100 - 2.3 kHz, 5mV) 6 dB FM TUNER SECTION Usabl e Sensitiv ity (98 MHz) 6 dB Signal / Noise Ratio Mono 72 dB (60 dB, IHF wtd) Stereo 66 dB Fr equency Response (20 Hz - 15 kHz, 60

21、 dB) 1.0 dB Channel Separ ation (60 dB) 30 Hz 33 dB 1 kHz 42 dB 10 kHz 35 dB Al ter nate Channel Sensitiv ity (40 dB, 400 kHz) 60 dB Captur e Ratio (40 dB) 1.5 dB AM Suppr ession (60 dB, 100% Mod.FM, 30% Mod.AM) 65 dB Image Rejection (119.4 MHz) 85 dB I. F. Rejection (10.7 MHz) 80 dB Pil ot Suppr es

22、sion (60 dB) 60 dB THD (60 dB, L=R 75 kHz for North America version; 40 kHz deviation for Europe version) 1-4 SPECIFICATIONS Mono 0.20% Stereo 0.25% Auto- Sear ch Sensitivity On 24dB Sensitivity Off 15 dB RDS Decode Sensitivity 25 dB DAB SECTION Band l l l 174MHz-240MHz Input 50 Ohm, nominal Max sig

23、nal -3dBm Sensitiv ity -96dBm Adjacent Channel Rejection 35dB Displ ay 2-line by 16-character DOT Matrix Audio Output Ster eo 2.5Vp-p 48kHz sample rate 16 bit sample Resolution Optical S/ PDIF IEC60958 Compliant 48kHz sample rate 24 bit sample resolution 1-5 2-1 SECTION 2 CABINET & MAIN CHASSIS CONT

24、ENTS EXPLODED VIEWS. 2-2 1. Cabinet and main framesection. 2-2 2. Packing accessory section. 2-3 3. Exploded view parts list. 2-4 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? M4 EXPLODED VIEWS 2-2 AC Cord DAB Antenna Shipping Box Gift Box poly

25、foam(down) Polyfoam(up) Batteries Accessory Box REMOCON AM Antenna M4 Packing Accessory Section 2-3 REF. NO.PART NO.DESCRIPTIONQty.REF. NO.PART NO.DESCRIPTIONQty. 1tekcarB RI0-200840-6610PF1s i ssahC2-100470-76100C C00201-50404-10 XM BOARD(AH)1 01-50403-20DAB BOARD includes DB1 ( C ) 1 C00301-54245-

26、20 C425 Main Board(AH Version)1S00161-023206-1Self Taping Screw (BTB3X6)13 01-54245-10 C425 Main Board(C Version)1S00261-022506-6Machine Screw (MB2.5X6-Ni)2 C00401-50401-10 MAIN BOARD(AH Version)1S00361-023616-0Self Taping Screw(TBBT316)4 01-50401-20 MAIN BOARD(C Version)1S00461-224512-1Hex Head Scr

27、ew (M4X12)8 C005A18-50420-00 R Type Transformer1S00561-224508-1Hex Head Screw (M4X8)8 C006A18-50407-00 standby Transformer1S00661-063106-0Self Taping Screw (STF3X6)4 C00783-043001-0 Foot Assembly4S00761-023106-2Self Taping Screw (STB3X6)15 S00861-024108-1Self Taping Screw (STB4X8)4 S00961-373506-0Ma

28、chine Screw (MB3X6W.S-Ni)8 2 ) i N-6X3BTS( wercS gn i paT f l eS1-601320-16010S12a i csaF0-100470-07100F 4) rC-8X6BM( wercS en i hcaM0-805642-16110S1rosruC g n i R0-200150-07200F F00376-048010-0 VFD window 1S01261-023208-0Self Taping Screw (BTB3X8)C:9 6:HA1red l oH r osruC1-100470-77400F F00587-0480

29、02-0 Input Button Pad7S01361-024106-0Self Taping Screw (STB46)2 F00687-048003-0 Power Button Pad2S01461-023508-0Machine Screw (MB3X8)4 F00786-046001-0 Led Lens Gum1S01563-020308-1Spring Washer4 4)3M( tuN2-203010-26610S1 s neL deL0-100800-67800F F00970-048013-0 Power Button1 F01092-048001-0 Spring fo

30、r Button9 7no t t uB t upnI1-210840-07110F F01270-051007-0 Enter Button1 1draoB PPF00-20405-10310F 11a i csaF0-200470-07J410F F01586-046002-0 Fascia Padding2 1a i csafbuS0-300470-76610F F01786-010004-0 3mm Rubber Pad3 R00167-074002-1Rear Panel (C Version)1 67-074004-1Rear Panel (AH Version)1 R00211-

31、01101-03Rocker Switch 1 1revoC poT0-200150-76100T 2x2/1daP RC0-510910-98200T T00376-046001-0Screw Washer4 XD0166-083003-0PCB Left Bracket1 XD0266-083004-0PCB Right Bracket1 M4 EXPLODED VIEW PARTS LIST ? SECTION 3 ELECTRICAL CONTENTS ELECTRICALTROUBLESHOOTING GUIDE.3-2 1. Power check flow.3-2 2. Prea

32、mp 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. MAIN BOARD DIG SECTION.3-8 2. MAIN BOARD PSU SECTION.3-9 3. FRONT

33、 PANEL BOARD3-10 4. DAB BOARD (C VERSION ONLY).3-11 5. XM BOARD (AH VERSION ONLY).3-11 PRINTED CIRCUIT DIAGRAMS 1. MAIN BOARD.3-12 2. FRONT PANEL BOARD.3-13 3. DAB BOARD (C VERSION ONLY).3-14 4. XM BOARD (AH VERSION ONLY).3-15 5. AM FM TUNER BOARD AH & C . . . . . . . . . . . . . . . . . . . . . . .

34、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 16 1.Power Check Flow Power switch on Orange LED ON? NO Check Power Switch and its cable Check F600 Check the standby Transformer Check U601 on the PSU board YES Hear the relay

35、s click? NO Check the MCU on the FPP board Check Q112,Q600 and K600 Check if the main transformers has been plugged in YES +/-13.5V power supply is correct? NO Press the standby button The End ELECTRICAL TROUBLESHOOTING GUIDE 5V is Right ? NO YES Check the MCU on the FPP board Check Q300-Q303,U302,U

36、303 Check the cable from J300 to J105 Check R621 and R622 Check the main transformer Check D602,Q601,Q603,Q604, Q605,Q606,Q607 Check PSU PCB YES +5.3V power supply is correct? NO Check R619,R620 Check D601 Check U603 YES +5V power supply output from U110 is correct? NOCheck the sockets and plugs Che

37、ck U110 YES 3-2 2. Operation flow Power on Orange LED change to blue? NO Check FPP board YES Hear the relays click? NO Check 5.3V relay supply Check Q101 Check SOURCE SELECT signal YES Relay respond properly? NO YES Wait for 10 second Press band key to change source FM,AM,DAB/XM mode Level=0.5V0.1V

38、? A Check conection between C425 and main board Check RL101 RL102 R184 R185 Check C425 board YES THD3%? NO YES NO 3-3 Press band key to select AM mode, input AM test signal 1K 500mV sinewave at antenna side,check output NO YES A Check U104 input IIs signal Check U105 U106 U107 U108 check DB1 module

39、THE END Press band key to select DAB(or XM) mode, input DAB (XM) test signal 1K 500mV(0dBFS) sinewave at antenna side,check output YES NO Press band key to select AM mode, input AM test signal 1K 500mV sinewave at antenna side,check output 3-4 DAB:Level=500mV50mV THD0.03%? XM: Level=2V0.1V THD0.03%?

40、 Level=500mV50mV THD5%? Check conection between C425 and main board Check RL101 RL102 R184 R185 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 18.432MHz CLOCK 2. M30281 reset in low active ? 3. I 2C control S DA and S CL 4. DAB/XM control RXD ? M30281FAHP MAI N MCU C425 BOARD FM/AM S E

41、CTI ON KEY I R AND DI S PLAY FPP BOARD NAD DB1 MODULE DAB S ECTI ON ( C VERS I ON ONLY) XM BOARD XM S ECTI ON ( AH VERS I ON ONLY) UART CONTROL LI NE AUDI O DAC PCM1796 OUTPUT FI LTER I I S S I GNAL I I S S I GNAL ANALOG OUT R ANALOG OUT L 1 3 2 A 1 3 2 A L R ANAL OG OUTPUT L R DI GI TAL COAX OUT DI

42、 GI TAL OPTO OUT 232 TRI G I R I NTERFACE M4 BLOCK DI AGRAM ? CI RCUI T DI AGRAMS 1.MAIN BOARD DIG SECTION 3-8 C124 22U/6.3V R142 10K C123 10U/10V C126 10U/10V C110 100N GND 1 I N 2 I N 3 EN 4 OUT 5 OUT 6 OUT 7 OUT 8 U111 TPS 2011 DGND C121 100N 1 2 3 4 5 6 7 8 9 11 10 J111 D Connector 9 KEYB1 KEYB2

43、 KEYB3 KEYB4 KEYB5 I R_F KEY_EN 3.3VD A0 1 A1 2 A2 3 Vss 4 S DA 5 S CL 6 WP 7 Vd d 8 U112 24LC16 DGND DGND S OURCE S ELECTS OURCE S ELECT MAI N MUTE R187 1K R188 1K Q110 2S C3326 3.3VD C165 10N J109 I R I N C166 10N DGND I R I N J110 +12 TRI G I N DGND R194 10K Q111 2S C1815 3.3VD R108 4K7 R141 10K

44、R169 3K3 TRI G_ON/OFF TRI G_I N R193 330R R140 10K R139 10K R107 4K7 R179 10R R178 10R R109 4K7 3.3VD R110 4K7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 J105 TO FPP_S CH CZ72 5VD I R_F KEYB1 KEYB2 KEYB3 KEYB4 KEYB5 KEY_DATA KEY_EN KEY_CLK 5V3 C125 22U/6.3V MAI N MUTE DAB/XM_RS T TRI G_ON/OFF TRI