Nad-C-445-Service-Manual 电路图 维修手册.pdf

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1、NAD C 445 FM / AM DAB TUNER C 445 CFM / AM DAB TUNER SERVICE MANUAL 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

2、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 AN

3、D 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 TY

4、PE 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. V

5、OLTAGE 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

6、, 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 MA

7、Y 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 PLA

8、TFORM 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

9、 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

10、 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 THA

11、T 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 TH

12、AT 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. Page 2 of 28 Radi

13、oFans.CN 收音机爱 好者资料库 Page 3 of 28 RadioFans.CN 收音机爱 好者资料库 FM SECTION Frequency Range: 87.50 MHz to 108.00 MHz (50 kHz steps) Signal-to-Noise Ratio: 65dB (Mono) 60dB (Stereo) Presets:30 AM SECTION Frequency Range: 522 kHz to 1620 kHz (9 kHz steps) Signal-to-Noise Ratio: 35dB Presets: DAB SECTION Band

14、lll: 174MHz - 240MHz Band L : 1452MHz - 1492MHz Max signal: -3dBm Sensitivity: -96dBm Adjacent Channel Rejection: 35dB Presets: ? ? Display:2-line by 16-character DOT Matrix Audio Output Stereo:2.5V P-P 48kHz sample rate, 16 bit sample resolution Optical S/PDIF: IEC60958 Compliant. 48kHz sample rate

15、, 24 bit sample resolution GENERAL Power Requirement: 230-240V AC, 50Hz Power Consumption: 12W 0.8W(standby) DIMENSIONS (MAX) Width Height Depth: 435 x 86 x 318mm Weight: 30 99 6kg SPECIFICATIONS Page 4 of 28 This unit is designed for trouble-free operation. Most problems users encounter are due to

16、operating errors. If you have a problem, first check this list for a possible solution. If the problem persists, consult your authorized Service Centre. SymptomCause/Correction No lights appear when System Power button is pressed Unit is plugged into a live outlet. Make sure the outlet is active. No

17、 sound is heard Tune to an active station. Check for correct amplifier settings. Check the connections and wires. Sound distorts, particularly in stereo mode. Use a more directional antenna. Intermittent or continuous buzzing or hissingPlace the unit further away from these appliances. Install noise

18、 filters on the appliances. Display says No stations Available Check that antenna is connected. Ensure that DAB coverage exists in your area. Display has gone blank or says service off air This may occur if a broadcaster changes the label of a service or removes a label whilst you are listening to i

19、t. Try to retune to this station, using the Autotune procedure. Units operation or the displays seem abnormalTo correct this problem, first unplug the unit from the AC wall outlet and wait at least three minutes. After the pause, reconnect the AC power cord and check the units operation. Reset the C

20、445 Tuner; press and hold the Menu/FM Mute Button for 5 seconds, until the Information Display shows FACTORY RESET. Note that when the system is reset, all tuner presets will be lost and must be re-entered. Press the RESET switch lightly once or twice with a pencil or ballpoint pen as per example be

21、low. If these steps do not solve the problem, consult your dealer or an authorized service centre. Rear Panel TROUBLESHOOTING Page 5 of 28 MAINTENANCE FLOW CHART MAINTENANCE FLOW CHART Start Power on Voltages NO1. Check Cable at pins of connector2. Replace Power Supply unit if Power Board is not sho

22、rted, (CN93) are normal? otherwise find out first where the short is. YES NO NOCheck CNVMB114MA18L Are FM/AM Is Power Supply(Tuner Module) MAIN Board normal? normal?and peripheral circuit. (CUP11866Y) YES NO Is PLL Check S3F84BB Clock normal?and peripheral circuit. YESYES Chcek TUNER module connecti

23、on Antenna. Power Board (CUP11866Y) NO NOCheck DAB Module Is DAB Is Power Supplyand peripheral normal? normal?circuit. YES NOCheck 74ACT04(IC73) or Is Voltage level74LVC04(IC74) and normal?peripheral circuit. MAIN BoardYES (CUP11866Y) YES NOCheck S3F84BB or DAB Are Clock andModule and peripheral Dat

24、a normal?Circuit. YES Check DAB Module connection Antenna. Normal Operation Page 6 of 28 WIRING DIAGRAM Page 7 of 28 Page 8 of 28 Page 9 of 28 Page 10 of 28 Page 11 of 28 Page 12 of 28 Terminal assignment Relay - top view Non-latching type, not energized condition latching, 2 coils reset condition L

25、atching type, reset condition FP2 Relay (RT21) 1? 2? 3? 4 8? 7? 6? 5 V+? Out B? In B? +In B Out A? In A? +In A? V OPA2134 8-Pin DIP, SO-8 A B BLOCK DIAGRAM (IC22, IC23, IC24: OP AMP) Page 13 of 28 PIN CONNECTION AND IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE PI

26、N NoSYMBOLNAME AND FUNCTION 1, 3, 5, 9, 11, 13 1A to 6AData Inputs 2, 4, 6, 8, 10, 12 1Y to 6YData Outputs 7GNDGround (0V) 14 VCC Positive Supply Voltage AY LH HL HEX INVERTER (IC73: 74ACT04) Page 14 of 28 Terminal Functions (IC21: PCM1796) TERMINAL I/ODESCRIPTIONS NAMEPIN I/ODESCRIPTIONS AGND119Ana

27、log ground (internal bias) AGND224Analog ground (internal bias) AGND3L27Analog ground (L-channel DACFF) AGND3R16Analog ground (R-channel DACFF) BCK6IBit clock input(1) DATA5ISerial audio data input(1) DGND8Digital ground IOUTL+25OL-channel analog current output+ IOUTL26OL-channel analog current outp

28、ut IOUTR+17OR-channel analog current output+ IOUTR18OR-channel analog current output IREF20Output current reference bias pin LRCK4ILeft and right clock (fS) input(1) MC12IMode control clock input(1) MDI11IMode control data input(1) MDO13I/OMode control readback data output(3) MS10I/OMode control chi

29、p-select input(2) MSEL3II2C/SPI select(1) RST14IReset(1) SCK7ISystem clock input(1) VCC123Analog power supply, 5 V VCC2L28Analog power supply (L-channel DACFF), 5 V VCC2R15Analog power supply (R-channel DACFF), 5 V VCOML22L-channel internal bias decoupling pin VCOMR21R-channel internal bias decoupli

30、ng pin VDD9Digital power supply, 3.3 V ZEROL1I/OZero flag for L-channel(2) ZEROR2I/OZero flag for R-channel(2) (1)Schmitt-trigger input, 5-V tolerant (2)Schmitt-trigger input and output. 5-V tolerant input and CMOS output (3)Schmitt-trigger input and output. 5-V tolerant input. In I2C mode, this pin

31、 becomes an open-drain 3-state output; otherwise, this pin is a CMOS output. Page 15 of 28 FUNCTIONAL BLOCK DIAGRAM (IC21: PCM1796) Power Supply RST SCK Advanced Segment DAC Modulator IOUTL+ IOUTL IOUTR Current Segment DAC IOUTR+ Bias and Vref VCOML VCOMR AGND2 VDD VCC1 VCC2L VCC2R AGND1 I/V and Fil

32、ter ?8 Oversampling Digital Filter and Function Control Audio Data Input I/F LRCK BCK DATA MDO MDI MC MS AGND3L AGND3R DGND Current Segment DAC IREF VOUTL I/V and Filter VOUTR Function Control I/F MSEL Zero Detect ZEROL ZEROR System Clock Manager Page 16 of 28 PIN ASSIGNMENTS(IC21: PCM1796) 1 2 3 4

33、5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 ZEROL ZEROR MSEL LRCK DATA BCK SCK DGND VDD MS MDI MC MDO RST VCC2L AGND3L IOUTL IOUTL+ AGND2 VCC1 VCOML VCOMR IREF AGND1 IOUTR IOUTR+ AGND3R VCC2R PCM1796 (TOP VIEW) Page 17 of 28 RESET IC (RE5VL28CATZ) : IC72 Page 18 of 28 IC71 FUN

34、CTION (MI-COM S3F84BB)IC71 FUNCTION (MI-COM S3F84BB) Pin No.PIN NAMEI/ODESCRIPTIONPin No.PIN NAMEI/ODESCRIPTION 18FIP-DAOFIP Data output port 9N.C-Non connection 10SINOIUART Data input port 11SOTOOUART Data output port 12VDD1IPower supply port(+5V) 13VSS1IGND 14XTOUTO 10MHz crystal connection port 1

35、5XINI 16TESTIBack-up Input 17,18N.C-Non connection 19RESETIReset input port(L) 20N.C-Non connection 21DAB_DINIDAB Data input port 22DAB_DOUTODAB Data output port 23DAB_CLKODAB Clock control port(L) 24FM/AM_MUTEOFM/AM MUTE control port(L) 25PLL_DATAOPLL Data output port 26PLL_CEOPLL Enable control po

36、rt 27PLL_CLKOPLL Clock control port 28STEREOITuner module stereo control port 29TUNEDITuner module tuned control port 30PLL_DINIPLL Data input port 31RDS_CLKORDS Clock control port 32RDS_DATAIRDS Data input port 33BACK_UPIBACK-UP mode control port(L) 34REMOTE_INIRemote unit data input port 3538N.C-N

37、on connection 39,40GNDIGND 41SCROLL_UPIScroll up control port 42SCROLL_DNIScroll down control port 43VREFIA/D converter reference voltage 44AVSSI GND 45GNDI 46KEY3I 47KEY2I 48KEY1IKEY 1 control port 4951N.C-Non connection 52VSS2IGND 53VDD2IPower supply port(+5V) 54SYSTEM_MUTEOSystem MUTE control por

38、t(L) 55STAND_BYOStandby on control port(L) 56FM/AM_ONOFM/AM on control port(L) 57N.C-Non connection 58POWER_ONOUnit turn on control port(L) 5964N.C-Non connection 6568OPTIONIGND or OPEN 6970N.C-Non connection 71OPTIONIGND or OPEN 7274N.C-Non connection 75OPTIONIGND or OPEN 7677N.C-Non connection 78R

39、S_PORegister selection port 79WRITEOWrite enable port 80READORead enable port Page 19 of 28 BLOCK DIAGRAM (IC71: S3F84BB) I/O Port and Interrupt Control SAM88RC CPU 64K-Byte ROM 2064-Byte RAM OSC/RESETB 8-Bit Basic Timer 8-Bit Timer /CounterA,B 8-Bit Timer/ CounterC0,C1 16-Bit Timer /Counter10,11 Po

40、rt 0Port 1A/D Port 2P2.0-P2.7 XIN XOUT RESETB P2.7/TAOUT P2.6/TACAP P2.5/TACK P3.6/TCOUT1 P2.4/TBOUT P3.4/T1OUT0 P1.0-P1.7P0.0-P0.7 AVREFAVSS Port 3P3.0-P3.7 Port 4 P4.0-P4.7/ INT0INT7 Port 5P5.0-P5.7 Port 6P6.0-P6.7 SIO/ UART0,1 PG P3.7/TCOUT0 P0.0P0.7/ PG0PG7 P3.2/T1CAP0 P3.0/T1CK0 P3.5/T1OUT1 P3.

41、3/T1CAP1 P3.1/T1CK1 P2.2/SCK P2.1/SI P2.0/SO P5.3/RXD0 P5.2/TXD0 P5.1/RXD1 P5.0/TXD1 Port 8Port 7D/A P7.0-P7.7/ ADC0ADC7 P8.0-P8.5/ INT8,INT9 P2.3/ DAOUT Figure 1-1. S3C84BB/F84BB Block Diagram Page 20 of 28 PIN ASSIGNMENT (IC71: S3F84BB) P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 P0.7/PG7 P0.6/PG6 P0.

42、5/PG5 P0.4/PG4 P0.3/PG3 P0.2/PG2 P0.1/PG1 P0.0/PG0 P2.7/TAOUT P2.6/TACAP P2.5/TACK P2.4/TBPWM P2.3/DAOUT P2.2/SCK P2.1/SI P2.0/SO P5.7 P5.6/SDAT P5.5/SCLK VDD1 VSS1 XOUT XIN TEST P5.4 P5.3/RxD0 RESETB P5.2/TxD0 P5.1/RxD1 P5.0/TxD1 P3.7/TCOUT1 P3.6/TCOUT0 S3C84BB/F84BB (80-QFP-1420C) 64 63 62 61 60 5

43、9 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 P3.5/T1OUT1 P3.4/T1OUT0 P3.3/T1CAP1 P3.2/T1CAP0 P3.1/T1CK1 P3.0/T1CK0 P4.7/INT7 P4.6/

44、INT6 P4.5/INT5 P4.4/INT4 P4.3/INT3 P4.2/INT2 P4.1/INT1 P4.0/INT0 P7.7/ADC7 P7.6/ADC6 P8.0 P8.1 P8.2 P8.3 P8.4/INT8 P8.5/INT9 P6.0 P6.1 P6.2 P6.3 P6.4 VDD2 VSS2 P6.5 P6.6 P6.7 P7.0/ADC0 P7.1/ADC1 P7.2/ADC2 P7.3/ADC3 AVSS AVREF P7.4/ADC4 P7.5/ADC5 Figure 1-2. S3C84BB/F84BB Pin Assignment (80-QFP) Page

45、 21 of 28 HEX INVERTER (IC74: 74LVC04A) PIN CONFIGURATION 1 2 3 4 5 6 7 1A 1Y 2A 2Y 3A 3Y GND VCC 6A 6Y 5A 5Y 4A 4Y 14 13 12 11 10 9 8 SV00396 PIN DESCRIPTION PIN NUMBERSYMBOLNAME AND FUNCTION 1, 3, 5, 9, 11, 131A to 6AData inputs 2, 4, 6, 8, 10, 121Y to 6YData outputs 7GNDGround (0 V) 14VCCPositive

46、 supply voltage LOGIC SYMBOL 1A1Y 2A2Y 3A3Y 4A4Y 5A5Y 6A6Y 1 3 5 9 11 13 2 4 6 8 10 12 SV00397 LOGIC SYMBOL (IEEE/IEC) 12 34 56 98 1110 1312 1 1 1 1 1 1 SV00398 LOGIC DIAGRAM (ONE GATE) AY SV00399 FUNCTION TABLE INPUTSOUTPUTS nAnY LH HL NOTES: H = HIGH voltage level L = LOW voltage level Page 22 of

47、28 KTC2874 1. Emitter 2. Collector 3. Base TO-92 123 1. INPUT 2. GND 3. OUTPUT NJM7805FA L7812CP TO-220FP 123 1. GND 2. INPUT 3. OUTPUT L7912CP TO-220FP 123 KTC2316 1. Emitter 2. Collector 3. Base TO-92L 123 TRANSISTOR, REGULATOR IC BLOCK DIAGRAM KRA107M KRC107M 1. Emitter 2. Collector 3. Base TO-92

48、M 123 Page 23 of 28 ELECTRICAL PARTS LISTELECTRICAL PARTS LIST RESISTORS AND CAPACITORS RESISTORS AND CAPACITORS Notes : Parts numbers are indicated for most mechanical parts. Please use this part number for parts order. IMPORTANT SAFETY NOTICE. Components identified by ! Mark have special character

49、istics important for safety. When replacing any of these components, use only manufactures specified parts. The unit of resistance is OHM () k=1000 () , M=1000 (k) The nuit of capacitance is MICROFARAD (uF) P=10-6 uF Numbering System of Resistor Example Numbering System of Resistor Example CRD 25 F J 101 Type