NAD-M12-pre-sm 维修电路原理图.pdf

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

2、TROUBLE SHOOTING A GUIDE.10TROUBLE SHOOTING B GUIDE.11PACKING ACCESSORY SECTION.70RadioFans.CN 收音机爱 好者资料库3SUBJECT: GRAPHIC SYMBOLSPRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTSA.C. VOLTMETERGOOD EARTH GROUNDSUCH AS THE WATERPIPE. CONDUIT. ETCPLACE THIS PROBEON EACH EXPOSEDMETAL PARTCAUTION :

3、 DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, NEVER PERFORM CUSTOM-IZED INSTALLATIONS WITHOUT MANUFACTURERSAPPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROP-ERTY DAMAGE OR USER INJURY.SERVICE WORK SHOULD BE PERFORMED O

4、NLY 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.SAFETY CHECKSAFTER THE ORIGINAL SE

5、RVICE PROBLEM HAS BEEN CORRCTED. A CHECK SHOULD BE MADE OF THE FOLLOWING.SUBJECT : FIRE & SHOCK HAZARD1.BE SURE THAT ALL COMPONENTS ARE POSI- TIONED IN SUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS.THIS IS ESPE-CIALLY IMPORTANT ON THOSE MODULES WHICH ARE TRANSPORTED TO AND FROM THE

6、 REPAIR SHOP.2. NEVER RELEASE A REPAIR UNLESS ALL PROTEC-TIVE DEVICES SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE-BEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE THAT THE SAFETY PURPOSE OF THE POLAR-IZED LINE PLUG HAS NOT BEEN DEFEATED.3.

7、SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD SOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS. BE CER-TAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION TO PARTS AND COMPONENTS. FOR FRAYED LEADS, DAMAGED INSULATION (INCLUDING A.C. CORD)

8、. AND REPLACE IF NECES-5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PROTRUNING METAL SURFACES MUST BE AVOIDED.6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES,

9、 DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE SPECIFIED OR MAKE UNRECOM-MENDED CIRCUIT MODIFICATIONS.7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PER-FORM AN A.C. LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HANDLEAND SCREWS) TO BE SURE TH

10、E SET IS SAFE TO OPERATE WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANS-FORMER DURING THIS TEST USE AN A.C. VOLTME-TER, HAVING 5000 OHMS PER VOLT OR MORE SEN-SITIVITY, IN THE FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT RESISTOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACIT

11、OR 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 MEASURE-MENTS FOR EACH EXPOSED METALLIC PART. VOLT-

12、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 EQUILATERAL TRIANGLE, IS INTENDEDTO ALERT THE SERVICE PERSONNE

13、L 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 IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. SERVI

14、CING PRECAUTIONS CAUTION:Before servicing the Stereo amplifier 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

15、 publication, always follow the safety precautions. Remember 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

16、 reconnecting any internal electrical plug or other electrical 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 ch

17、emicals on or near this Stereo amplifier 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 specifie

18、d 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 amplifier and/or any of its electrical assemblies unless a

19、ll 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

20、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 1 M-ohm. Note 1: Accessible Conductive Parts inclu

21、ding 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 int

22、egrated 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 handing any semiconductor component or semiconductor-equipped assembly, d

23、rain 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 reason prior to applying power to the unit under test. 2. After removing an electrical

24、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

25、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 un

26、til 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. Immediately before removing the protective material from the leads of a replacement ES devi

27、ce, 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

28、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.)4SPECIFICATIONS?5DIGITAL INPUT (COAXIAL, OPTICAL, USB)M12Rated Distortion (THD+N with AES 17 filter)-115dB (ref. 0

29、dBFS Volume -1dB)Signal / Noise Ratio-125dB (ref. 0dBFS 2V out)Output Level2V (ref. input 0dBFS)INPUTS/OUTPUTSXLR - AES/EBUS/PDIF Coaxial x 2 Optical x 2USB Class 2 Audio: asynchronous 24/192 supportDD AP-1 Analogue Phono ModuleIR InTrigger In12V 20%Trigger Out12V 20%GENERALIdle Power26WStandby Powe

30、rAH : A-BD093D194D298D399D75D64D53D4100D1279D1380D1483D1584D1187D1088D989D890A728A629A510A411A044A143A214A312A1141A1042A949A850A1235A1334A1471A1567CS95A1668A1719RD82WR81U1APIC32MX695F512LD07D18D29D310D716D615D514D413D1235D1336D1437D1538D1132D1031D930D829A720A619A518A45A01A12A23A34A1124A1023A922A821A

31、1225A1326A1427A1542WE17A1643A1744CE6RD41VDD11VDD33VS S12VS S34UB40LB39U2IC-IS61WV25616BLL-10TL1122C1100nF1122C2100nFRB025RB124RB223RB322RB421RB933RC16RG1397RA792RA1466RD277RG1296U1EPIC32MX695F512LLCD_EN7LCD_HS32LCD_VS8LCD_DISP1TP_INT18TP_RES ET76S CK58S DA59BL78U1DPIC32MX695F512LVCAP85VBUS55CLKI63VD

32、D?CLKO64VDD?VDD?VDD?VDD?VS S?VS S?VS S?VS S?VS S?AVDD?AVS S?S OS CI73S OS CO74VDD?MCLR?U1BPIC32MX695F512L1234J7CON-FPC 50P-4N-TOPGND1GND2VDD4VDD3R27R38R16R05G013G114G316G215R611R712R510R49G619G720G518G417CLK30DISP31VS33HS32GND2934363539403837B425B526B728B627B223B324B122B021J1CON-FPC 50P-40N-TOP12345

33、678J8VIN6GND2S W1VOUT5FB3EN4U7AP5724WG-71122C3100nF1122R110K1122C4100nF?1234J4CON-04P-2.5MM(nc)1122C1347uF 6.3V12Y18M1122C1522pF1122C1622pF?1?2R5NC(1M)21Y2NC1122C1715pF1122C1815pF1122R6NC(1M)1122C122.2uF1122C191UF?1?2R83.3R 1%1122R910K1122R10NC12L122uH(744032220)1122C22100nF1122R114.7K1122R124.7K112

34、2R1310K1122R1410K1122R151K1122C232.2U1122R165K1?23456789101112J6NC1122C2510uF1122C2610uFOE1A2GND3Y4VCC5U9NC(NC7S P125P5X)1122R17NC1122R1801122R190DIR1A12A23A34A45A56A67A78A89GND10B811B712B613B514B415B316B217B118OE19VCC20U10NC(SN74LV245ATPWR)1122C28100nF(nc)1?22R2001122R21NCDIR1A12A23A34A45A56A67A78A

35、89GN?10B811B712B613B514B415B316B217B118OE19VCC20U11NC(SN74LV245ATPWR)1122C29100nF(nc)1122R2201122R2301122R2401122R2501122R2601122R2701122R2801122R290?1?2R300?1?2R310?1?2R320?1?2R330?1?2R340?1?2R350?1?2R360?1?2R3701122R3801122R3901122R4001122R41NC1122R42NC1122R43NC1122C24100nF1122C20100nF1122C27NC112

36、2C30100nF?TP1TP-R ND-601122C3210uFD0D0D0WRWRWRD1D1D1D2D2D2D3D3D3D4D4D4D5D5D5D6D6D6D7D7D7D8D8D8GNDGNDD9D9D9?3V3D10D10D10D11D11D11D12D12D12D13D13D13D14D14D14D15D15D15MCLRA0A0A1A1A2A2A3A3A4A4FBFBA5A5A6A6A7A7A8A8A9A9PWMA10A10A11A11A12A12A13A13S CKA14A14S DAA15A15A16A16A17A17RB0RB0RB1RB1RB2RB2RB3RB3RB4RB

37、4RB9RB9S D0S D0S D1S D1CLKS D2S D2S D3S D3S D4S D4S D5S D5S D6S D6S D7S D7S D8S D8S D9S D9S D10S D10S D11S D11S D12S D12S D13S D13S D14S D14S D15S D15D0.15A0.17D0.15S D0.15D0.15S D0.15S D0.153V3?3V33V33V33V33V33V33V33V33V33V33V31122R4601?22R47NC1122R480NCNCBeagl e 10 Pi n Debug Por tI CD2 Debug Por

38、tUART Debug Por tCE1S O2WP3GND4S I5S CK6HOLD7VDD8U3NC(IC-SS T25VF016B-50-4C-S2AF)TCK38TDI60TDO61TMS17PGEC226PGED227U5TX39U5RX40CLK70S DO72S DI9CS69CS47S DI52S DO53CLK48BUS Y91D+57D-56VBUS54VBUS ON20ID51U1CPIC32MX695F512LA2C1D1NC(ES D9L5.0S T5G)11334466V?5V?7D2NC1122C5100nF(nc)1122C6100nF1122R20?1?2R

39、3C? ? ? ?01122R40123?J3CON-04P-2.54MM-S(nc)1122C14100nF12345678910J5NC?122R70123456J9NC1122C31100nF123456J10NC1122R4401122C33100nFMCLRVBUSS CKS DA3V33V33V3VBUS3V3LCD CSLCD S DILCD-SDOLCD-CLKR4547RJC21470nZ+5vsD1G2V3U12TSOP 34838C3410UFF_BuS YaF_STBaF_MOSIaF_CLK aF_MISOaF_BuSYaIRFaF_S TBaF_MOS IaF_MI

40、SOaF_CLKaIRFaF_BuS YaC35100N5VS FL11FB+5vs3V3C3610UFC3710UF21D3B340LA12345J2CON-5X2.5MMHDR+5VSQ1DTC114EKAGND1122R49100RLCD _RSTLCD_RS TPWMCLK1?22R50100KENEN8.USB XMOS BOARD (1/2)OC_DETECTUSER_VBOFTP7009TESTPADGND1IN12IN23EN4OC5OUT16OUT27OUT38U7005TPS2021DR702347kC70244.7uTP7008TESTPADR702247kR70250R

41、C7023100n1243D7002PRTR5V0U2XVBUS_US ERVBUS_US ERVCC3V3VBUS_US ERUSB-USER? VBUS generation?with? Ov ercurrent Detection? in outputC7016100nC70?533nR70104.7kR70094.7kC70134.7uC70184.7uC701733nC7014100nVDD11DQ02VDDQ13DQ14DQ25VS SQ46DQ37DQ48VDDQ29DQ510DQ611VS SQ312DQ713VDD214DQML15WE16CAS17RAS18CS19BA02

42、0BA121A1022A023A124A225A326VDD327VS S328A429A530A631A732A833A934A1135A1236CKE37CLK38DQMH39NC40VS S241DQ842VDDQ343DQ944DQ1045VS SQ246DQ1147DQ1248VDDQ449DQ1350DQ1451VS SQ152DQ1553VS S154U7000MT48LC16M16A23V3S DSDRAM 256 MbitsClose to U7000 each VDD/VSS pairsR7014100k(NC)R7012100k(NC)C7019100n(NC)VCC3V

43、3VCC3V3VCC3V3Close to device power pinSerial DataFlash 64 MbitsPA21PA025PA127PA230PA332PA434PA5?PA6?PA743PA845PA947PA1048PA1150PA1253PA1354PA1456PA1557PA1658PA1760PA1862PA1964PA2066PA2173PA2274PA2375PA2476PA2577PA2678PA2779PA2880PA29122PA30123PB088PB190PB296PB398PB4100PB5102PB6104PB7106PB8111PB9113P

44、B10115PB11119PB12121PB13126PB14127PB15134PB16136PB17139PB18141PB19143PB203PB215PB226PB239PB2411PB2513PB2614PB2715PB2819PB2920PB3021PB3122PC085PC186PC2124PC3125PC4132PC5133PX01PX12PX24PX310PX412PX524PX626PX731PX833PX935PX1038PX1140PX1242PX1344PX1446PX1559PX1661PX1763PX1865PX1967PX2087PX2189PX2291PX23

45、95PX2497PX2599PX26101PX27103PX28105PX29107PX30110PX31112PX32114PX33118PX34120PX35135PX36137PX37140PX38142PX39144RESET_n23TCK129TDO130TDI131TMS128ADVREF82DP71DM70VDDANA81VDDIO6116VDDIO5108GND7109GND694VDDIO493VDDPLL84GND572VBUS68GNDANA83VDDIO369VDDCORE355GND452VDDCORE251NC49GND337VDDIO236VDDCORE129GN

46、D228GND118VDDIN17VDDOUT16GND08VDDIO17GND8117VDDCORE4138VDDIO092U7003AT32UC3A0512TP7018TESTPADR702839R28028R702739RR70310RR70300RVDD3V3IOVDD1V8PLLVDD3V3INVDD1V8OUTVDD3V3ANAVDD3V3ANAVBUS_USERVDD1V8CORERESETnCl ose to UC3A pinsTP7 012?TP7 010?TP7 011?TP7 015TP?TP7 013?TP7 016TPTP7 017TPTP7 014?VCC3V3?

47、? ? ? ? ? ? ? ? ? ?C702122PC702222PXC7001Q12.0-SMU4-30-30/30-XC700011.2896MC702622pC702522pDQM1CS1nD0D1D2D3D4D5D6D7D8D9D10A16A17A13A14A2A3A4A5A6A7A8A9A10A11D11D12D13D14D15DQM0A2A3A4A5A6A7A8A9A10A11A13A14A16A17SDCKSDCKERASnCASnSDWEnSDA10DQM1DQM0SDA10SDCKSDCKERASnCASnSDWEnCS1nD0D1D2D3D4D5D6D7D8D9D10D1

48、1D12D13D14D15SPI0_CS0SPI0_S CKSPI0_MOSISPI0_MISOUSBH_FSUSBH_BCKUSBH_SD0US BH_FSUS BH_BCKUS BH_S D0SPI0_CS0SPI0_SCKSPI0_MOSISPI0_MISOUSBH_MCLKUS BH_MCLKEVTO_NJTAG_TCKJTAG_TDOJTAG_TDIJTAG_TMSEVTO_N? ?A18OC_DETOC_DETUSER_VBOFUSER_VBOFR70000R?D7001Yellow-Green LED SMDL7001BLM18HE152SN1L7000BLM18HE152SN1

49、TP7000TESTPADR70054R7TP7003TESTPADTP7001TESTPADTP7004TESTPADTP7002TESTPADTP7005TESTPADR7007150RR70010RVDD3V3INVDD3V3IOVCC3V3VDD3V3ANAVCC5VVCC3V3A1R70110RTP7006TESTPADTP7007TESTPADGNDANAC704533nC706133nC7050100nC706?33nC703733nC7057100nC705?33nC70534.7uC70332.7nC70302.2uC7047470pC7029100nC7055100nC70

50、434.7uC7051100nC7044100nC70342.7nC703833nC703533nC704133nC70422.2uC705233nC7056100nC70402.7nC70312.7nC7054100nC703633nC7048100nC706433nC706333nC70322.7nC70462.2uC704933nC706233nC7058100nVDD1V8OUTVDD1V8COREVDD1V8COREVDD1V8COREVDD1V8COREVDD1V8PLLVDD3V3ANAVDD3V3IOVDD3V3INVDD3V3IOVDD3V3IODecoupling Capa