NAD-M15CAH-avr-sm 维修电路原理图.pdf

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1、SERVICE MANUALSERVICE MANUALM15 C/AH? ? NAD 2007NAD ELECTRONICS INTERNATIONALTORONTO?M15 C/AHSOUND PREAMPLIFIERSOUND PREAMPLIFIERS U R R O U N DS U R R O U N DM15 C/AHS U R R O U N DSOUND PREAMPLIFIERRadioFans.CN 收音机爱 好者资料库CONTENTSSECTION 1 . . . .SUMMARYSECTION 2 . . . .CABINET & MAIN CHASSISSECTIO

2、N 3 . . . .ELECTRICALSECTION 4 . . . .REPLACEMENT PARTS LISTSECTION 5 . . . .VERSION HISTORYRadioFans.CN 收音机爱 好者资料库SECTION 1SUMMARYCONTENTSPRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS.1- 2SERVICING PRECAUTIONS .1- 3 General Servicing Precautions Insulation Checking Prodedure Electrostatica

3、lly SensitiveDevices1- 1ADJUSTMENT PROCEDURE . SPECIFICATIONS . 1- 5 1- 4 OSD VCO Oscillation Frequency (VIDEO BOARD)1- 2SUBJECT: GRAPHIC SYMBOLSPRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTSA.C. VOLTMETERGOOD EARTH GROUNDSUCH AS THE WATERPIPE. CONDUIT. ETCPLACE THIS PROBEON EACH EXPOSEDMETA

4、L PARTCAUTION : 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

5、 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.SAFETY CHECKSAFTER

6、THE ORIGINAL SERVICE 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

7、TO AND FROM THE 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 BE

8、EN DEFEATED.3. 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 (INCLU

9、DING A.C. CORD). 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

10、 FACTORY TYPES, 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 SCREW

11、S) TO BE SURE THE 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

12、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 MEASURE-MENTS FOR EACH EXPOSED META

13、LLIC 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 EQUILATERAL TRIANGLE, IS INTENDEDTO ALERT THE

14、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 IMPORTANT SAFETY INFORMATION IN SERVICE

15、LITERATURE. SERVICING PRECAUTIONS CAUTION:Bef ore servicing the Surround sound preamplif ier covered by this service data and its supplements and addends, read and f ollow the SAFETY PRECAUTIONS. NOTE: if unf oreseen circumstances create conf lict between the f ollowing servicing precautions and any

16、 of the saf ety precautions in this publication, always f ollow the saf ety precautions. Remember Saf ety First: General Servicing Precautions 1. Always unplug the Surround sound preamplif ier AC power cord f rom the AC power source bef ore: (1) Removing or reinstalling any component, circuit board,

17、 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 substitute or incorrect polarity installation of electrolytic capacitors m

18、ay result in an explosion hazard. 2. Do not spray chemicals on or near this Surround sound preamplif ier or any of its assemblies. 3. Unless specif ied otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner,

19、cotton tipped swab, or comparable sof t applicator. Unless specif ied otherwise in this service data, lubrication of contacts is not required. 4. Do not def eat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might be equipped. 5. Do not apply AC power to

20、this Surround sound preamplif ier 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 bef ore connecting the test instrument positive lead. Always remove the test instrument

21、 ground lead last. Insulation Checking Procedure Disconnect the attachment plug f rom the AC outlet and turn the power on. Connect an insulation resistance meter (500V) to the blades of the attachment plug. The insulation resistances between each blade of the attachment plug and accessible conductiv

22、e parts (Note 1) should be more than 1 M- ohm. Note 1: Accessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc. Electro statically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly ar

23、e called Electro statically Sensitive (ES) Devices. Examples of typical Es devices are integrated circuits and some f ield ef f ect transistors and semiconductor chip components. The f ollowing techniques should be used to help reduce the incidence of component damage caused by static electricity. 1

24、. Immediately bef ore handing any semiconductor component or semiconductor- equipped assembly, drain of f 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 f or poten

25、tial shock reason prior to applying power to the unit under test. 2. Af ter removing an electrical assembly equipped with ES devices, place the assembly on a conductive surf ace such as aluminum f oil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded- tip s

26、oldering iron to solder or unsolder ES devices. 4. Use only an antistatic solder removal device. Some solder removal devices not classif ied a “ anti- static” can generate electrical charges suf f icient to damage ES devices. 5. Do not use Freon propelled chemicals. These can generate electrical cha

27、rge suf f icient to damage ES devices. 6. Do not remove a replacement ES device f rom its protective package until immediately bef ore you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive f oam, aluminum f oil, or comparable co

28、nductive material). 7. Immediately bef ore removing the protective material f rom 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 observ

29、e all other saf ety precautions. 8. Minimize bodily motions when handing unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes f abric or the lif ting of your f oot f rom a carpeted f loor can generate static electricity suf f icient to damage an

30、ES device.) 1- 3ADJUSTMENT PROCEDUREOSD VCO Osci l l ati on Frequency ( VIDEO BOARD)Connect M15 CVBS monitor out to a TV set. Pre ss “ Enter” key on remotecontrol to call OSD out.Then clockwiseadjust C1162 and observetheOSD till thecharacters arejust disappear, recordtheadjustment slot position A; t

31、hen anticlockwiseC1162 to maketheOSD characters disappearand record theadjustment slot position B again. Adjust theadjustment slot position in themiddleofA and B. Get in “ DISPLAY SETUP” OSD Menu and switch theunit in both “ NTSC” and PAL”mode, observetheOSD characters, they should beall stabledispl

32、aying without any f licker.1- 4C1162VIDEO BOARDSOFTWARE VERSI ON:TO DISPLAY SOFTWARE VERSIONS, PRESS FRONT PANEL video & audio SIMULTANEOUSLYSPECIFICATIONSDECODING FORMATS Dolby Digital, Dolby Digital EX, Dolby Pro Logic II, Dolby Pro Logic IIx, DTS, DTS ES, DTS Neo:6, DTS 96/24, THX Surround EX, TH

33、X Ultra 2 SAMPLING RATES 32kHz, 44.1kHz, 48kHz, 88.2k, 96kHzMODES EARS, Enhanced stereo, MonoVIDEO ( i nput and output i mpedance) 75THD + NOISE 0.002% PRE- AMP SECTION LINE LEVEL INPUTS Input impedance(R + C) 56K/180PFFrequency response(20Hz to 20KHZ)20Hz to 20kHz +/- 0.3dBLINE LEVEL OUTPUTS Output

34、 impedance 470Tape Source Z + 2kSignal/noise ratio 102dB Maximum Output Level 6Vrms Multiroom Output (Zone 2) 470TONE CONTROLS Bass 10dB20Hz Treble 10dB20kHz Center Dialog 6dB1kHz +12VOLT TRIGGER OUT Output Voltage +12V +/- 20% Minimum Output Current 40ma Maximum Short Circuit Current 16vudgnd5vsvol

35、ume controlTP1T.P.(NI)dgnd5vsIR receiverR32110RJC320470nZdgnd5vsdgnd5vsC308100nZdgndIR input/outputRemRxto AUD boardC31110u/50/5mm5vsdgndC306100nZdgndC307100nZdgnd12vtQ303DTC11412D301Blue/AmberdgndR317270RJR318470RJ5vsLED as Amber=standby, Blue=ondgnddgnd123456CON7026pin to CON602ir1 outir2 outir in

36、pclkpdatvfdrwvfdrsvfdek00 search downk01 preset downk02 displayk03 FM mutek04 audiok05 ext 7.1k06 tape monk10 search upk11 preset upk12 memoryk13 AM/FMk14 videok15 surround modek25 levelsk20 spkr A(power)k21 spkr Bk22 tone controlsk23 tone defeatk24 digital audiok25 levelsQ311DTA1145vsa11b12y13a24b2

37、5y26gnd7y38a39b310y411b412a413vcc14U30574HC132gnd1Vcc2rst3RS4R/W5E6d07d18d29d310d411d512d613d714M30120T202DA1(J)poweronD1G2V3U307HS0038B4dgnd5vs123456789R3268X10k*5vSk0k1k2R328100RJR329100RJC31822nKC31422nKdgnddgndPADS JP1.1 and JP1.2 of M301 are linked . Pin3=/Resetchassis1chassis2C752100nZC751100n

38、Z1234567891011121314CON31114pin5vsrstR37147KJD3715V6dgnd5vsponpon12345678910111213141516s2s11718192021222324CON30124pin12345678910111213141516s2s11718192021222324CON30424pindgnddgndrstdgnddgndsmutedgnddgnddgnddgnddgnddgndK320Keytrig2 outtgndmresetmresetmpfimfppibfppdibumtedgnddgnddgnddgnd12vttgndbfp

39、pdobfppstbfppclkbblkstPCB31HS4-M15_B008V3_0_0-FPP.schSub board(Encoder Board)irdgnd5vsdgndVfd0Vfd1Vfd2Vfd3Vfd4Vfd5Vfd6Vfd7VfdeVfdrwVfdrsvfdrst5vsdgnd12345678CON3218pin from CON722b16vub5vsb12vtbpoweronbdgndbtgnd12345678CON7228pin to CON321b16vub5vsb12vtbpoweronbdgndbtgndbVolAbVolBVolAVolB1122U311IR

40、SHELLdgndR325100KJ5vsC33322nKdgndchassis3C33422nKdgndchassis4C33522nKdgndchassis5C33622nKdgndchassis6C33722nKdgndchassis7C33822nKdgndchassis8C33922nKdgndchassis9C74122nKbdgndC74222nKbdgndchassis12PCB71HS4-M15_B008V3_0_0-ENCQ312DTA114fpprxdfpptxdsh/ld1clk2d43d54d65d76q7gnd8q9ser10d011d112d213d314clki

41、nh15vcc16U31274HC165dgnd5vsdgndpstb0pclkdgndblkstdgnddgnddgnddgnddgnddgndtrigmpublkstC340100nZdgnd5vsfpp232/sc232fpprxdfpptxd5vsfpp232/sc232dgnddgnddgnd/fpppsen/fpppsenR37247RJneed TEST Q312 voltage2.FRONT PANEL CIRCUIT DIAGRAM3- 15N1L2J51AC-OUTPUT(C only)L2N1J52AC-OUTPUT(AH only)13CON522pin13CON512

42、pinfrom AC inletliniCS512n2/400vacTo VID13CON532pinfrom AC SwitchPCB51HS4-M15_B008V3_1_0-HDMIli11/g11a122y431a242y351a362y271a482y19gnd102a1111y4122a2131y3142a3151y2162a4171y1182/g19vcc20U5574LCX244dgnd3v3dpbs7dgndvcc16q11q015q22ser14q33/g13q44rck12q55sck11q66/sclr10q77qh9gnd8U5674HC595pbstpbclkpbdo

43、dgnd3v3dstbclkdodgnddoclkstbdata2+1data2g2data2-3data1+4data1g5data1-6data0+7data0g8data0-9clk+10clkg11clk-12cec( nc)13nc14sck15sda16g175v18detect19J55HDMI SOCKETdata2+1data2g2data2-3data1+4data1g5data1-6data0+7data0g8data0-9clk+10clkg11clk-12cec( nc)13nc14sck15sda16g175v18detect19J56HDMI SOCKETdata

44、2+1data2g2data2-3data1+4data1g5data1-6data0+7data0g8data0-9clk+10clkg11clk-12cec( nc)13nc14sck15sda16g175v18detect19J57HDMI SOCKETdgnddgnddgnddgnddgndahpdbcab12345678910111213141516s2s11718192021222324CON5524pindgnddgndfrom VIDpbs7pbi7bmrstpbstpbclkpbdodgnddgndmcmckdgnddgnddgnddgnddgnddgnd5vdxmckaxs

45、ckaxfsaxdaadgnddgnddgnddgndR52A10kJR52B10kJR52C10kJR52D10kJdgnddgnddgnddgnd3v3ddoclkstb3v3dC55100nZdgnd3v3dC56100nZdgnd3v3dD525V6dgndadata2+adata2-adata1-adata1+adata0+adata0-aclk+aclk-asdaasckdgndvcc7vcc13vcc17vcc27vcc33vcc43vcc50vcc56vcc61vcc69vcc75vcc79gnd4gnd10gnd16gnd24gnd30gnd36gnd37gnd47gnd53

46、gnd59gnd65gnd66gnd72gnd78nc1nc20nc41nc60/oe42pre19vsadj18s121s222s323a116a129a1312a1415a2168a2271a2374a2477a3149a3252a3355a3458b115b128b1311b1414b2167b2270b2373b2476b3148b3251b3354b3457scl_sink38sda_sink39hpd_sink40y134y231y328y425z135z232z329z426scl13sda12hpd180hpd262hpd344scl264scl346sda263sda345U

47、58TMDS341dgnddgnddgnddgnddgndbhpdbdata2+bdata2-bdata1-bdata1+bdata0+bdata0-bclk+bclk-bsdabsckdgnddgnddgnddgnddgndthpdtdata2+tdata2-tdata1-tdata1+tdata0+tdata0-tclk+tclk-tsdatsckbhpdbdata2+bdata2-bdata1-bdata1+bdata0+bdata0-bclk+bclk-bsdabsckahpdadata2+adata2-adata1-adata1+adata0+adata0-aclk+aclk-asd

48、aasckdgnddgnddgnddgnddgnddgnddgnddgnddgnddgnddgnddgnddgnddgnd3v3d3v3d3v3d3v3d3v3d3v3d3v3d3v3d3v3d3v3d3v3d3v3dthpdtdata2+tdata2-tdata1-tdata1+tdata0+tdata0-tclk+tclk-tsdatsckdgnds2bcabR554k64Fdgndpreprepre is output pre-emphasis adjustment, high=3dBdgndadj1out2in3U59LM1117MPX-ADJR54243RFR53392RFC5101

49、0u/50C59100nZC511100u/163v3ddgndC58100u/165vddgndt5vhdmis2C513100nZC514100nZC515100nZC512100nZC516100nZC517100nZ3v3ddgndC519100nZC520100nZC521100nZC518100nZ3v3ddgndR56100RJC52322nKdgndC52422nKdgndC52222nKR5810RJ5vdt5vhdmiC531100nZC532100nZcecceccecF512AFC51FUSE CLIPFC52FUSE CLIP3.HDMI CIRCUIT DIAGRA

50、M3- 16J4019BS+RCAJ4019AS+RCAi/o gndi/o gndComposite Monitorin31S D2in23S CK4in05in16p7in48Vcc9in510in711GND12out513out414out315out216out117out018GND19in620U4000TEA6415CDJ4011BS+RCAJ4012BS+RCAJ4013BS+RCAJ4015BS+RCAJ4017BS+RCACV1CV2CV3CV4CV5R400075RFC4000220nZC4001220nZC4002220nZR400175RFR400275RFR400