NAD-M12-pre-sm维修电路原理图.pdf

《NAD-M12-pre-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《NAD-M12-pre-sm维修电路原理图.pdf（70页珍藏版）》请在收音机爱好者资料库上搜索。

1、NAD SERVICE MANUAL ? DIGITAL PREAMP DAC ? DIGITAL PREAMP DAC RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION.3-4 SPECIFICATIONS. 5 WIRING DIAGRAM.6 BLOCK DIAGRAM. .7-9 .12-28 8 PCB LAYOUT.29-40 ELECTRICAL PARTS LIST.41-67 EXPLODED VIEW.68 EXPLODED VIEW PARTS LIST.69 CIR

2、CUIT DIAGRAMS TROUBLE SHOOTING A GUIDE.10 TROUBLE SHOOTING B GUIDE.11 PACKING ACCESSORY SECTION.70 RadioFans.CN 收音机爱 好者资料库 3 SUBJECT: GRAPHIC SYMBOLS PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS A.C. VOLTMETER GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC PLACE THIS PROBE ON EACH

3、EXPOSED METAL PART CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, NEVER PERFORM CUSTOM- IZED INSTALLATIONS WITHOUT MANUFACTURERS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROP- ERTY DAMAGE OR USER INJURY. SE

4、RVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVIC- ING GUIDELINES. TO DO OTHERWISE,INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANS- FORMER FOR PROTECTION FROM A.C. LINESHOCK

5、. SAFETY CHECKS AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRCTED. A CHECK SHOULD BE MADE OF THE FOLLOWING. SUBJECT : FIRE CONNECT A 1500 OHM 10 WATT RESISTOR, 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 P

6、ARTS, 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 MEASURE- 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 V

7、ALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE COR- RECTED IMMEDIATELY. THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNI

8、TUDE 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 IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. RadioFans.CN 收音机爱 好者资料库 SERVICING PRECAUTIONS CAUTION:Before servicing the Stereo amplif

9、ier 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. Remembe

10、r Safety First: General Servicing Precautions 1. Always unplug the Stereo amplifier 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 electri

11、cal connection. (3) Connecting a test substitute in parallel with an electrolytic capacitor. Caution: A wrong part substitute or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. 2. Do not spray chemicals on or near this Stereo amplifier or any of its asse

12、mblies. 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 i

13、s 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 amplifier and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed.

14、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 insulatio

15、n 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 1 M-ohm. Note 1: Accessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc.

16、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 se

17、miconductor 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 or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touchin

18、g a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reason prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on

19、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

20、 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

21、 replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circu

22、it 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 clo

23、thes 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 SPECIFICATIONS ? ? 5 DIGITAL INPUT (COAXIAL, OPTICAL, USB)M12 Rated Distortion (THD+N with AES 17 filter)-115dB (ref. 0dBFS Volume -1dB) Signal

24、/ Noise Ratio-125dB (ref. 0dBFS 2V out) Output Level2V (ref. input 0dBFS) INPUTS/OUTPUTS XLR - AES/EBU S/PDIF Coaxial x 2 Optical x 2 USB Class 2 Audio: asynchronous 24/192 support DD AP-1 Analogue Phono Module IR In Trigger In12V 20% Trigger Out12V 20% GENERAL Idle Power26W Standby PowerA H : A-B D

25、0 93 D1 94 D2 98 D3 99 D7 5 D6 4 D5 3 D4 100 D12 79 D13 80 D14 83 D15 84 D11 87 D10 88 D9 89 D8 90 A7 28 A6 29 A5 10 A4 11 A0 44 A1 43 A2 14 A3 12 A11 41 A10 42 A9 49 A8 50 A12 35 A13 34 A14 71 A15 67 CS 95 A16 68 A17 19 RD 82 WR 81 U1A PIC32MX695F512L D0 7 D1 8 D2 9 D3 10 D7 16 D6 15 D5 14 D4 13 D1

26、2 35 D13 36 D14 37 D15 38 D11 32 D10 31 D9 30 D8 29 A7 20 A6 19 A5 18 A4 5 A0 1 A1 2 A2 3 A3 4 A11 24 A10 23 A9 22 A8 21 A12 25 A13 26 A14 27 A15 42 WE 17 A16 43 A17 44 CE 6 RD 41 VDD 11 VDD 33 VS S 12 VS S 34 UB 40 LB 39 U2 IC-IS61WV25616BLL-10TL 1 1 2 2 C1 100nF 1 1 2 2 C2 100nF RB0 25 RB1 24 RB2

27、23 RB3 22 RB4 21 RB9 33 RC1 6 RG13 97 RA7 92 RA14 66 RD2 77 RG12 96 U1E PIC32MX695F512L LCD_EN 7 LCD_HS 32 LCD_VS 8 LCD_DISP 1 TP_INT 18 TP_RES ET 76 S CK 58 S DA 59 BL 78 U1D PIC32MX695F512L VCAP 85 VBUS 55 CLKI 63 VDD ? CLKO 64 VDD ? VDD ? VDD ? VDD ? VS S ? VS S ? VS S ? VS S ? VS S ? AVDD ? AVS

28、S ? S OS CI 73 S OS CO 74 VDD ? MCLR ? U1B PIC32MX695F512L 1 2 3 4 J7 CON-FPC 50P-4N-TOP GND 1 GND 2 VDD 4 VDD 3 R2 7 R3 8 R1 6 R0 5 G0 13 G1 14 G3 16 G2 15 R6 11 R7 12 R5 10 R4 9 G6 19 G7 20 G5 18 G4 17 CLK 30 DISP 31 VS 33 HS 32 GND 29 34 36 35 39 40 38 37 B4 25 B5 26 B7 28 B6 27 B2 23 B3 24 B1 22

29、 B0 21 J1 CON-FPC 50P-40N-TOP 1 2 3 4 5 6 7 8 J8 VIN 6 GND 2 S W 1 VOUT 5 FB 3 EN 4 U7 AP5724WG-7 1 1 2 2 C3 100nF 1 1 2 2 R1 10K 1 1 2 2 C4 100nF ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1 2 3 4 J4 CON-04P-2.5MM(nc) 1 1 2 2 C13 47uF 6.3V 12 Y1 8M 1 1 2 2 C1522pF 1 1 2 2 C16 22pF

30、? 1 ? 2 R5 NC(1M) 21 Y2 NC 1 1 2 2 C17 15pF 1 1 2 2 C18 15pF 1 1 2 2 R6 NC(1M) 1 1 2 2 C12 2.2uF 1 1 2 2 C19 1UF ? 1 ? 2 R8 3.3R 1% 1 1 2 2 R9 10K 1 1 2 2 R10 NC 12 L122uH(744032220) 1 1 2 2 C22 100nF 1 1 2 2 R11 4.7K 1 1 2 2 R12 4.7K 1 1 2 2 R13 10K 1 1 2 2 R14 10K 1 1 2 2 R15 1K 1 1 2 2 C23 2.2U 1

31、 1 2 2 R16 5K1 ? 2 3 4 5 6 7 8 9 10 11 12 J6 NC 1 1 2 2 C25 10uF 1 1 2 2 C26 10uF OE 1 A 2 GND 3 Y 4 VCC 5 U9 NC(NC7S P125P5X) 1 1 2 2 R17 NC 1 1 2 2 R180 1 1 2 2 R19 0 DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 B8 11 B7 12 B6 13 B5 14 B4 15 B3 16 B2 17 B1 18 OE 19 VCC 20 U10 NC(SN74LV245A

32、TPWR) 1 1 2 2 C28 100nF(nc) 1 ? 2 2 R20 0 1 1 2 2 R21 NC DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GN? 10 B8 11 B7 12 B6 13 B5 14 B4 15 B3 16 B2 17 B1 18 OE 19 VCC 20 U11 NC(SN74LV245ATPWR) 1 1 2 2 C29 100nF(nc) 1 1 2 2R22 0 1 1 2 2 R23 0 1 1 2 2 R24 0 1 1 2 2 R25 0 1 1 2 2 R26 0 1 1 2 2 R27 0 1

33、 1 2 2 R28 0 1 1 2 2 R29 0 ? 1 ? 2 R30 0 ? 1 ? 2 R31 0 ? 1 ? 2 R32 0 ? 1 ? 2 R33 0 ? 1 ? 2 R34 0 ? 1 ? 2 R35 0 ? 1 ? 2 R36 0 ? 1 ? 2 R37 0 1 1 2 2 R38 0 1 1 2 2R39 0 1 1 2 2 R40 0 1 1 2 2 R41 NC 1 1 2 2 R42 NC 1 1 2 2 R43NC 1 1 2 2 C24 100nF 1 1 2 2 C20 100nF 1 1 2 2 C27 NC 1 1 2 2 C30 100nF ? TP1 T

34、P-R ND-60 1 1 2 2 C32 10uF D0 D0 D0 WR WR WR D1 D1 D1 D2 D2 D2 D3 D3 D3 D4 D4 D4 D5 D5 D5 D6 D6 D6 D7 D7 D7 D8 D8 D8 GND GND D9 D9 D9 ? 3V3 D10 D10 D10 D11 D11 D11 D12 D12 D12 D13 D13 D13 D14 D14 D14 D15 D15 D15 MCLR A0A0 A1A1 A2A2 A3A3 A4A4 FB FB A5A5 A6A6 A7A7 A8A8 A9A9 PWM A10A10 A11A11 A12A12 A1

35、3A13 S CK A14A14 S DA A15A15 A16A16 A17A17 RB0RB0 RB1RB1 RB2RB2 RB3RB3 RB4RB4 RB9RB9 S D0 S D0 S D1 S D1 CLK S D2 S D2 S D3 S D3 S D4 S D4 S D5 S D5 S D6 S D6 S D7 S D7 S D8 S D8 S D9 S D9 S D10 S D10 S D11 S D11 S D12 S D12 S D13 S D13 S D14 S D14 S D15 S D15 D0.15 A0.17 D0.15 S D0.15 D0.15 S D0.15

36、 S D0.15 3V3 ? 3V3 3V33V3 3V3 3V3 3V3 3V3 3V3 3V3 3V3 3V3 1 1 2 2 R46 0 1 ? 2 2 R47 NC 1 1 2 2 R48 0 NC NC Beagl e 10 Pi n Debug Por t I CD2 Debug Por t UART Debug Por t CE 1 S O 2 WP 3 GND 4 S I 5 S CK 6 HOLD 7 VDD 8 U3 NC(IC-SS T25VF016B-50-4C-S2AF) TCK 38 TDI 60 TDO 61 TMS 17 PGEC2 26 PGED2 27 U5

37、TX 39 U5RX 40 CLK 70 S DO 72 S DI 9 CS 69 CS 47 S DI 52 S DO 53 CLK 48 BUS Y 91 D+ 57 D- 56 VBUS 54 VBUS ON 20 ID 51 U1C PIC32MX695F512L A 2 C 1 D1 NC(ES D9L5.0S T5G) 1 1 3 3 4 4 6 6 V? 5 V? 7 D2 NC 1 1 2 2 C5 100nF(nc) 1 1 2 2 C6 100nF 1 1 2 2 R2 0 ? 1 ? 2 R3 C? ? ? ?0 1 1 2 2 R40 1 2 3 ? J3 CON-04

38、P-2.54MM-S(nc) 1 1 2 2 C14 100nF 1 2 3 4 5 6 7 8 9 10 J5 NC ? 1 2 2 R7 0 1 2 3 4 5 6 J9 NC 1 1 2 2 C31 100nF 1 2 3 4 5 6 J10 NC 1 1 2 2 R44 0 1 1 2 2 C33 100nF MCLR VBUS S CK S DA 3V3 3V3 3V3 VBUS 3V3 LCD CS LCD S DI LCD-SDO LCD-CLK R45 47RJ C21 470nZ +5vs D 1 G 2 V 3 U12 TSOP 34838 C34 10UF F_BuS Y

39、a F_STBa F_MOSIa F_CLK a F_MISOa F_BuSYa IRFa F_S TBa F_MOS Ia F_MISOa F_CLKa IRFa F_BuS Ya C35 100N 5VS F L11 FB +5vs 3V3 C36 10UF C37 10UF 21 D3 B340LA 1 2 3 4 5 J2 CON-5X2.5MMHDR +5VS Q1 DTC114EKA GND 1 1 2 2 R49 100R LCD _RST LCD_RS T PWM CLK 1 ? 2 2 R50 100K EN EN RadioFans.CN 收音机爱 好者资料库 8.USB

40、XMOS BOARD (1/2) OC_DETECT USER_VBOF TP7009 TESTPAD GND 1 IN1 2 IN2 3 EN 4 OC 5 OUT1 6 OUT2 7 OUT3 8 U7005 TPS2021D R7023 47k C7024 4.7u TP7008 TESTPAD R7022 47k R7025 0R C7023 100n 1 2 4 3 D7002 PRTR5V0U2X VBUS_US ER VBUS_US ER VCC3V3 VBUS_US ER USB-USER? VBUS generation? with? Ov ercurrent Detecti

41、on? in output C7016 100n C70?5 33n R70104.7k R70094.7k C7013 4.7u C7018 4.7u C7017 33n C7014 100n VDD1 1 DQ0 2 VDDQ1 3 DQ1 4 DQ2 5 VS SQ4 6 DQ3 7 DQ4 8 VDDQ2 9 DQ5 10 DQ6 11 VS SQ3 12 DQ7 13 VDD2 14 DQML 15 WE 16 CAS 17 RAS 18 CS 19 BA0 20 BA1 21 A10 22 A0 23 A1 24 A2 25 A3 26 VDD3 27 VS S3 28 A4 29

42、 A5 30 A6 31 A7 32 A8 33 A9 34 A11 35 A12 36 CKE 37 CLK 38 DQMH 39 NC 40 VS S2 41 DQ8 42 VDDQ3 43 DQ9 44 DQ10 45 VS SQ2 46 DQ11 47 DQ12 48 VDDQ4 49 DQ13 50 DQ14 51 VS SQ1 52 DQ15 53 VS S1 54 U7000 MT48LC16M16A2 3V3S D SDRAM 256 Mbits Close to U7000 each VDD/VSS pairs R7014 100k(NC) R7012 100k(NC) C7

43、019 100n(NC) VCC3V3 VCC3V3 VCC3V3 Close to device power pin Serial DataFlash 64 Mbits PA21 PA0 25 PA1 27 PA2 30 PA3 32 PA4 34 PA5 ? PA6 ? PA7 43 PA8 45 PA9 47 PA10 48 PA11 50 PA12 53 PA13 54 PA14 56 PA15 57 PA16 58 PA17 60 PA18 62 PA19 64 PA20 66 PA21 73 PA22 74 PA23 75 PA24 76 PA25 77 PA26 78 PA27

44、79 PA28 80 PA29 122 PA30 123 PB0 88 PB1 90 PB2 96 PB3 98 PB4 100 PB5 102 PB6 104 PB7 106 PB8 111 PB9 113 PB10 115 PB11 119 PB12 121 PB13 126 PB14 127 PB15 134 PB16 136 PB17 139 PB18 141 PB19 143 PB20 3 PB21 5 PB22 6 PB23 9 PB24 11 PB25 13 PB26 14 PB27 15 PB28 19 PB29 20 PB30 21 PB31 22 PC0 85 PC1 86

45、 PC2 124 PC3 125 PC4 132 PC5 133 PX0 1 PX1 2 PX2 4 PX3 10 PX4 12 PX5 24 PX6 26 PX7 31 PX8 33 PX9 35 PX10 38 PX11 40 PX12 42 PX13 44 PX14 46 PX15 59 PX16 61 PX17 63 PX18 65 PX19 67 PX20 87 PX21 89 PX22 91 PX23 95 PX24 97 PX25 99 PX26 101 PX27 103 PX28 105 PX29 107 PX30 110 PX31 112 PX32 114 PX33 118

46、PX34 120 PX35 135 PX36 137 PX37 140 PX38 142 PX39 144 RESET_n 23 TCK 129 TDO 130 TDI 131 TMS 128 ADVREF 82 DP 71 DM 70 VDDANA 81 VDDIO6 116 VDDIO5 108 GND7 109 GND6 94 VDDIO4 93 VDDPLL 84 GND5 72 VBUS 68 GNDANA 83 VDDIO3 69 VDDCORE3 55 GND4 52 VDDCORE2 51 NC 49 GND3 37 VDDIO2 36 VDDCORE1 29 GND2 28

47、GND1 18 VDDIN 17 VDDOUT 16 GND0 8 VDDIO1 7 GND8 117 VDDCORE4 138 VDDIO0 92 U7003 AT32UC3A0512 TP7018 TESTPAD R702839R28028 R702739R R7031 0R R7030 0R VDD3V3IO VDD1V8PLL VDD3V3IN VDD1V8OUT VDD3V3ANA VDD3V3ANA VBUS_USER VDD1V8CORE RESETn Cl ose to UC3A pins TP7 012? TP7 010? ? ? TP7 011? TP7 015TP ? ?

48、 ? ? ? ? ? TP7 013? TP7 016TP TP7 017TP TP7 014? VCC3V3 ? ? ? ? ? ? ? ? ? ? ? C7021 22P C7022 22P XC7001 Q12.0-SMU4-30-30/30- XC7000 11.2896M C7026 22p C7025 22p DQM1 CS1n D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 A16 A17 A13 A14 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 D11 D12 D13 D14 D15 DQM0 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A13 A14 A16 A17 SDCK SDCKE RASn CASn SDWEn SDA10 DQM1 DQM0 SDA10 SDCK SDCKE RASn CASn SDWEn CS1n D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 SPI0_CS0 SPI0_S CK SPI0_MOSI SPI0_MISO USBH_FS USBH_BCK USBH_SD0 US BH_FS U