NAD-CI940-pwr-sm 维修电路原理图.pdf

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1、NADSERVICE MANUALCI 940 MULTI-CHANNELAMPLIFIERCI 940 MULTI-CHANNELAMPLIFIER RadioFans.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 PCB LAYOUT.17-20EXPLODED VIEW PARTS LIST.37 CIRCUIT DIAGRAMS.TROUBLE SHOOTING GUIDE.10EXPLODED VIEW .36.11-16EL

2、ECTRICAL VIEW PARTS LIST.21-35BLOCK DIAGRAM.7-9 RadioFans.CN 收音机爱 好者资料库PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT INANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONSWITHOUT MANUFACTURERS APPROVAL. UNAUTHORIZEDMODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUTMA

3、Y LEAD TO YOUR BEING LIABLE FOR ANY RESULTINGPROPERTY DAMAGE OR USER INJURY.SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOUARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWINGSAFETY CHECKS AND SERVICING GUIDELINES. TO DOOTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDSAND INJURY TO THE USER. WHILE SER

4、VICING, USE AN ISOLATION TRANSFORMER FORPROTECTION FROM AC LINE SHOCK.SAFETY CHECKSAFTER THE ORIGINAL SERVICE PROBLEM HAS BEENCORRECTED. A CHECK SHOULD BE MADE OF THEFOLLOWING.SUBJECT : FIRE & SHOCK HAZARD1. BE SURE THAT ALL COMPONENTS ARE POSITIONED INSUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENTC

5、OMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANTON THOSE MODULES WHICH ARE TRANSPORTED TO ANDFROM THE REPAIR SHOP. 2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVEDEVICES SUCH AS INSULATORS, BARRIERS, COVERS,SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, ANDOTHER HARDWARE HAVE BEEN REINSTALLED PERORIGINAL

6、 DESIGN. BE SURE THAT THE SAFETY PURPOSEOF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLECOLD SOLDER JOINTS, SOLDER SPLASHES OR SHARPSOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSEFOREIGN PARTICLES.4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE ORDETERIORAT

7、ION TO PARTS AND COMPONENTS. FORFRAYED LEADS, DAMAGED INSULATION (INCLUDING ACCORD). AND REPLACE IF NECESSARY FOLLOW ORIGINALLAYOUT, LEAD LENGTH AND DRESS.5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVINGTUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEADTENSION AROUND PROTRUDING METAL SURFACES MUSTBE A

8、VOIDED.6. ALL CRITICAL COMPONENTS SUCH AS FUSES,FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BEREPLACED WITH EXACT FACTORY TYPES, DO NOT USEREPLACEMENT COMPONENTS OTHER THAN THOSESPECIFIED OR MAKE UNRECOMMENDED CIRCUITMODIFICATIONS.7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM ANAC LEAKAGE TEST ON A

9、LL EXPOSED METALLIC PARTS OFTHE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNATERMINALS. HANDLE AND SCREWS) TO BE SURE THE SETIS SAFET TO OPERATE WITHOUT DANGER OF ELECTRICALSHOCK. DO NOT USE A LINE ISOLATION TRANSFORMERDURING THIS TEST USE AN AC VOLTMETER, HAVING 5000OHMS PER VOLT OR MORE SENSITIVITY

10、, IN THEFOLLOWING MANNER; CONNECT A 1500 OHM 10 WATTRESISTOR, PARALLELED BY A .15 MFD, 150V AC TYPECAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND(WATER PIPE, CONDUIT, ETC.) AND THE EXPOSEDMETALLIC PARTS, ONE AT A TIME. MEASURE THE AC VOLTAGE ACROSS THE COMBINATIONOF 1500 OHM RESISTOR AND .15 MFD CAPACI

11、TOR. REVERSE THE AC PLUG AND REPEAT AC VOLTAGEMEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S.THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUEEXCEEDING THIS LIMIT CONSTITUTES A POTENTIALSHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.SUBJECT : GRAPHIC SYMBOLSS

12、UBJECT : TIPS ON PROPER INSTALLATION1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS,CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVEROR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATEDAIR FLOW.2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS:OUTDOOR PATIO INSTALLATIONS WHERE DEW IS AFACTOR, NEAR STEAM RADIA

13、TORS WHERE STEAMLEAKAGE IS A FACTOR, ETC.3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCTREAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THEUSE OF DECORATIVE SCARVES OR OTHER COVERINGSWHICH MIGHT OBSTRUCT VENTILATION.4. WALL AND SHELF MOUNTED INSTALLATIONS USING ACOMMERCAL MOUNTING KIT MUST FOLLOW THE F

14、ACTORYAPPROVED MOUNTING INSTRUCTIONS A PRODUCTMOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITSORIGINAL FEET (OR THE EQUIVALENT THICKNESS INSPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSSTHE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERSMUST NOT TOUCH ANY PARTS OR WIRING. PERFORMLEAKAGE TEST ON CUSTOMIZED INS

15、TALLATIONS.5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF APRODUCT ON SLOPING SHELF OR A TILTED POSITION,UNLESS THE PRODUCT IS PROPERLY SECURED.6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLEON ITS MOUNTING TO THE CART. CAUTION THECUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CARTWITH SMALL CASTERS A

16、CROSS THRESHOLDS OR DEEPPILE CARPETS.7. CAUTION CUSTOMERS AGAINST THE USE OF A CART ORSTAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERSLABORATORIES, INC. FOR USE WITH THEIR SPECIFICMODEL OF TELEVISION RECEIVER OR GENERICALLYAPPROVED FOR USE WITH T.V.S OF THE SAME ORLARGER SCREEN SIZE.8. CAUTION CUSTOM

17、ERS AGAINST THE USE OF EXTENSIONCORDS, EXPLAIN THAT A FOREST OF EXTENSIONSSPROUTING FROM A SINGLE OUTLET CAN LEAD TODISASTROUS CONSEQUENCES TO HOME AND FAMILY.THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN ANEQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE USER TO THEPRESENCE OF UNINSULATED “DANGER

18、OUS VOLTAGE” WITHIN THEPRODUCTS ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TOCONSTITUTE A RISK OF ELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE ISINTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANTOPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THELITERATURE ACCOMP

19、ANYING THE APPLIANCE.3SERVICING PRECAUTIONSCAUTION : Before servicing the poweramplifier covered by thisservice data and its supplements and addends, read and follow theSAFETY PRECAUTIONS. NOTE : if unforeseen circumstancescreate conflict between the following servicing precautions and anyof the saf

20、ety precautions in this publication, always follow the safetyprecautions.Remember Safety First:General Servicing Precautions1. Always unplug the poweramplifier AC power cord from the ACpower source before:(1) Removing or reinstalling any component, circuit board,module, or any other assembly.(2) Dis

21、connecting or reconnecting any internal electrical plug orother electrical connection.(3) Connecting a test substitute in parallel with an electrolyticcapacitor.Caution : A wrong part substitution or incorrect polarity installationof electrolytic capacitors may result in an explosion hazard.2. Do no

22、t spray chemicals on or near this poweramplifier or any of itsassemblies.3. Unless specified otherwise in this service data, clean electricalcontacts by applying an appropriate contact cleaning solution tothe contacts with a pipe cleaner, cottontipped swab, orcomparable soft applicator.Unless specif

23、ied otherwise in this service data, lubrication ofcontacts is not required.4. Do not defeat any plug/socket B+ voltage interlocks with whichinstruments covered by this service manual might be equipped.5. Do not apply AC power to this poweramplifier and/or any of itselectrical assemblies unless all s

24、olid-state device heat sinks arecorrectly installed.6. Always connect test instrument ground lead to the appropriateground before connecting the test instrument positive lead. Alwaysremove the test instrument ground lead last.Insulation Checking ProcedureDisconnect the attachment plug from the AC ou

25、tlet and turn thepower on. Connect an insulation resistance meter(500V) to theblades of the attachment plug. The insulation resistance betweeneach blade of the attachment plug and accessible conductive parts(Note 1) should be more than 1M-ohm.Note 1 : Accessible Conductive Parts including Metal pane

26、ls, Inputterminals, Earphone jacks, etc.Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily bystatic electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices. Examples of typical Esdevices are integrated circuits and

27、some field effect transistors andsemiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component orsemiconductor-equipped assembly, drain off any electrostati

28、ccharge on your body by touching a known earth ground.Alternatively, obtain and wear a commercially availabledischarging wrist strap device, which should be removed forpotential shock reasons prior to applying power to the unit undertest.2. After removing an electrical assembly equipped with ES devi

29、ces,place the assembly on a conductive surface such as aluminumfoil, to prevent electrostatic charge buildup or exposure of theassembly.3. Use only a grounded-tip soldering iron to solder or unsolder ESdevices.4. Use only an antistatic solder removal device. Some solderremoval devices not classified

30、 a “anti-static” can generateelectrical charges sufficient to damage ES devices.5. Do not use freonpropelled chemicals. These can generateelectrical charge sufficient to damage ES devices.6. Do not remove a replacement ES device from its protectivepackage until immediately before you are ready to in

31、stall it. (Mostreplacement ES devices are packaged with leads electricallyshorted together by conductive foam, aluminum foil, orcomparable conductive material).7. lmmediately before removing the protective material from theleads of a replacement ES device, touch the protective material tothe chassis

32、 or circuit assembly into which the device will beinstalled.Caution : Be sure no power is applied to the chassis or circuit, andobserve all other safety precautions.8. Minimize bodily motions when handing unpackaged replacementES devices. (Normally harmless motion such as the brushingtogether of you

33、r clothes fabric or the lifting of your foot from acarpeted floor can generate static electricity sufficient to damagean ES device.)4SPECIFICATIONS ENGLISHFRANAISESPAOLDEUTSCHNEDERLANDSSVENSKA5CI 940Continuous Output Power 8 Ohms/4 Ohms8 Ohms in Bridge Mode4 x 35W (ref. rated THD, 20Hz-20kHz, all ch

34、annels driven)2 x 70WRated THD (250mW to rated power, CCIF IMD, DIM 100)0.03% (ref. 20Hz-20kHz)IHF Dynamic Power 8 ohms4 ohms2 ohms55W85W95WDamping Factor180 (ref. 8 ohms, 50Hz and 1kHz)Input Sensitivity270mV (ref. rated power)Voltage Gain35dBFrequency Response0.2dB (ref. 20Hz-20kHz)-3dB at 3Hz and

35、100kHzSignal/Noise Ratio, A-Weighted95dBA (ref. 1W)110dB (ref. 35W)Trigger5-30V In (AC/DC)-52dBV, 12V OutTime to Automatic Standby (without signal at input sense mode)10 minutesGENERALRated Power270W (120V 60Hz, 230V 50Hz)Idle Power55WStandby power2 3 0VD CG N D9PIN2.0M MR964180KR955180KR9721KR97110

36、KQ956BC817-40R973470KR974220KC9574U71.MAIN BOARD 17PCB LAYOUTTop LayoutBottom Layout 2.DISPLAY BOARD AND POWERKEY BOARD 18Top LayoutBottom Layout 3.INPUT BOARD Top LayoutBottom Layout 4.PSU & DCDC BOARD 19Top LayoutBottom Layout 5. PSU DUAL VOLTAGE BOARD 20Top LayoutBottom Layout ELECTRICAL PARTS LI

37、ST PCB-1:MAIN BOARDNOITPIRCSED.ON TRAPPCB INFO01-94001-20Main Board02-94001-01Main BoardA16-94001-22Main Board PCBVM1.1 FR-4,1.6mm,2Layers,1Oz,TG130,231260mmDIODED101, D103, D104, D105, D106, D201,D203, D204, D205, D206, D301, D303,D304, D305, D306, D401, D403, D404,D405, D406, D807, D80933-44148-00

38、Switch Diode1N4148D102, D202, D302, D402, D802, D803,D81033-14709-00Zener Diode4.7V, 1/2W14-OD W1 V42edo iD reneZ01-00421-33808D ,608DTRANSISTOR1045N2rot s i snarT30-10450-13206Q ,205QQ113, Q213, Q31331-05551-02Transistor2N5551Q102, Q103, Q104, Q202, Q203, Q204,Q302, Q303, Q304, Q402, Q403, Q40431-0

39、0970-00Transistor2SA970-GR(TPE2,F) TO-92Q102, Q103, Q104, Q202, Q203, Q204,Q302, Q303, Q304, Q402, Q403, Q404or 31-01268-00TransistorKTA1268-GR, TO-92RG-5101Arot s i snarT40-51010-13408QRG-5181Crot s i snarT40-51810-13308Q ,108QQ105, Q205, Q305, Q40531-02240-00Transistor2SC2240-GR(TPE2,F) TO-92Q105,

40、 Q205, Q305, Q405or 31-03200-00TransistorKTC3200-GR，TO-92RESISTOR01rot s i seR ml iF l ateM05-00102-70116R ,115R, 1/6W, 5%R118, R218, R318, R41807-21800-50Metal Film Resistor180,1/6W,1%R130, R230, R330, R43007-22709-50Metal Film Resistor27, 1/6W, 1%R119, R219, R319, R41907-20820-50Metal Film Resisto

41、r82, 1/6W, 5%R108, R112, R117, R208, R212, R217,R308, R312, R317, R408, R412, R41707-20101-50Metal Film Resistor100, 1/6W, 5%R114, R214, R314, R41407-20331-50Metal Film Resistor330, 1/6W, 5%R111, R211, R311, R41107-20391-50Metal Film Resistor390, 1/6W, 5%R101, R105, R201, R205, R301, R305,R401, R405

42、07-20471-50Metal Film Resistor470, 1/6W, 5%R127, R227, R327, R42707-28660-50Metal Film ResistorRJ13 866, 1/6W, 1%R113, R115, R135, R136, R138, R139,R213, R215, R235, R236, R238, R239,R313, R315, R335, R336, R338, R339,R413, R415, R435, R436, R438, R43907-20102-50Metal Film Resistor1K, 1/6W, 5%R126,

43、R226, R326, R42607-20122-50Metal Film Resistor1K2, 1/6W, 5%R109, R209, R309, R40907-22201-50Metal Film Resistor2K2, 1/6W, 1%R110, R210, R310, R41007-20222-50Metal Film Resistor2K2, 1/6W, 5%2K8rot s i seR ml iF l ateM05-10282-70544R ,541R, 1/6W, 5%R124, R125, R224, R225, R503, R324,R325, R424, R425,

44、R60307-20472-50Metal Film Resistor4K7, 1/6W, 5%R102, R107, R202, R207, R245, R504,R302, R307, R345, R402, R407, R604,R801, R802, R805, R816, R817, R82507-20103-50Metal Film Resistor10K, 1/6W, 5%21R103, R104, R137, R140, R141, R203,R204, R237, R240, R241, R303, R304,R337, R340, R341, R403, R404, R437

45、,R440, R441, R819, R821, R823, R82407-20223-50Metal Film Resistor22K, 1/6W, 5%R82607-22202-50Metal Film Resistor22k,1/6W,1%R82707-22702-50Metal Film Resistor27K,1/6W,1%R81307-20473-50Metal Film Resistor47K, 1/6W, 5%R142, R242, R342, R44207-20563-50Metal Film Resistor56K, 1/6W, 5%R100, R122, R200, R2

46、22, R300, R322,R400, R422, R82007-20104-50Metal Film Resistor100K, 1/6W, 5%R116, R121, R216, R221, R316, R321,R416, R42107-20105-50Metal Film Resistor1M,1/6W,5%R120, R220, R512, R320, R420, R61207-22431-51Metal Film ResistorRJ14,2.43K,1/4W,1%R82207-20101-50Metal Film Resistor100, 1/6W, 5%R143, R243,

47、 R343, R44307-20339-20Metal Film Resistor3.3, 1/2W, 5%R123, R223, R323, R42307-20470-20Metal Film Resistor47, 1/2W, 5%R106, R206, R306, R40607-20332-51Metal Film Resistor3K3, 1/4W, 5%R131, R134, R231, R234, R331, R334,R431, R43407-30510-01Metal Oxide Film Resistor51, 1W, 5%R128, R129, R228, R229, R3

48、28, R329,R428, R429,07-30102-05Metal Oxide Film Resistor1K, 1W, 5%R144, R244, R344, R44407-30100-12Metal Oxide Film Resistor10, 2W, 5%R81807-30271-01Metal Oxide Film Resistor270, 1W, 5%R81107-30332-01Metal Oxide Film Resistor3.3K, 1W, 5%, Pitch=5mmR132, R133, R232, R233, R332, R333,R432, R43307-4068

49、7-03Cement Resistor0.068, 3W, 5%CAPACTIORC108, C208, C308, C40805-10013-01Ceramic Capacitor10pF, 5%, 1KVC112, C212, C312, C41205-47013-01Ceramic Capacitor47pF, 5%, 1KVC105, C205, C305, C40505-10113-04Ceramic Capacitor100pF, 5%, 1KVC122, C123, C222, C223, C322, C323,C422, C42305-22113-01Ceramic Capac

50、itor220pF, 10%, 1KVC124, C224, C324, C42405-47113-02Ceramic Capacitor470pF, 5%, 1KVC31825-22361-05Polyester capacitor22nF, 5%, 63VC114, C214, C314, C41425-47361-01Polyester capacitor47nF, 5%, 63VC109, C110, C119, C120, C121, C219,C220, C221, C309, C310, C320, C321,C419, C420, C421, C807, C80825-1046