NAD-C355BEE-int-sm 维修电路原理图.pdf

NADSERVICE MANUALC 355BEESTEREOAMPLIFIERC 355BEE STEREOAMPLIFIERRadioFans.CN 收音机爱 好者资料库TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION.3-4REAR PANEL/FRONT PANEL VIEW.5 SPECIFICATIONS6-7 WIRING DIAGRAM8 BLOCK DIAGRAM. .9-13 ALIGNMENT PROCEDURE.14 SCHEMATICS.15-18 PCB LAYOUT.19-22TROUBLE SHOOTING GUIDE.23 ELECTRICAL PARTS LIST.24-33 EXPLODED VIEW.34 EXPLODED VIEW PARTS LIST.35 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, BUTMAY 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 SERVICING, 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 ADJACENTCOMPONENT 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 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 ORDETERIORATION 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 AVOIDED.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 ALL 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, 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 CAPACITOR. 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 SYMBOLSSUBJECT : 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 RADIATORS 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 FACTORYAPPROVED 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 INSTALLATIONS.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 ACROSS 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 CUSTOMERS 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 “DANGEROUS 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 ACCOMPANYING THE APPLIANCE.3SERVICING PRECAUTIONSCAUTION : Before servicing the A/V Receiver 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 safety precautions in this publication, always follow the safetyprecautions.Remember Safety First:General Servicing Precautions1. Always unplug the A/V Receiver AC power cord from the ACpower source before:(1) Removing or reinstalling any component, circuit board,module, or any other assembly.(2) Disconnecting 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 not spray chemicals on or near this A/V Receiver 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 specified 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 A/V Receiver and/or any of itselectrical assemblies unless all solid-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 outlet 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 panels, 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 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 electrostaticcharge 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 devices,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 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 install 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 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 your clothes fabric or the lifting of your foot from acarpeted floor can generate static electricity sufficient to damagean ES device.)4 INPUT(TAPE MONITOR)16. RS- 232 INPUT17. PRE OUT 118. ON OFF POWER (AC) SWITCH(2) LED5123115791046811. SPEAKERS A & B1614123418567 81791012111513SPECIFICATIONSPOWER AMPLIFIER SECTIONSTEREO MODECONTINUOUS AVERAGE POWER 80 W (19 dBW) OUTPUT INTO 8 OHMS OR 4 OHMS(Min. power per channel, 20 Hz 20 kHz, with no more than rated distortion)Rated Distortion0.02%(THD 20 Hz 20 kHz)Clipping power 90 W(maximum continuous power per channel 4 and 8).IHF dynamic headroom: at 8 ohms+ 2.4 dB at 4 ohms+ 4.4 dBIHF dynamic power(maximum short term power per channel)8 ohms:160 W (20.4 dBW)4 ohms: 220 W (22.0 dBW)2 ohms:270 W (23.2 dBW)Damping factor 100(ref. 8 ohms 1 kHz)Input ImpedanceR = 20 kohmsC = 1 nFInput sensitivity (for rated output into 8 ohms) 950 mVVoltage gain29 dB Frequency response 20 Hz 20 kH 0.1 dBSignal / Noise ratio, A-weighted100 dB r ef. 1 W119 dB r ef. 50 WTHD + Noise 0.02%(Total Harmonic Distortion, 20 Hz 20 kHz,from 250 mW to rated output)SMPTE I.M. 0.01%(Intermodulation Distortion, 60 Hz + 7 kHz, 4:1,from 250 mW to rated output)IHF I.M. 0.01%(CCIF IM Distortion, 19 + 20 kHz at rated output)Headphones Output Impedance220 ohms6PREAMPLIFIER SECTIONLINE LEVEL INPUTS(Disk, CD, Video, Auxiliary, Tuner, Tape 1,Tape 2)Input impedance (R and C) 200 kohms + 100 pFInput sensitivity (ref. rated power) 310 mVMaximum input signal 6 VSignal / Noise ratio, A-weighted 97.0 dB r ef. 1W(from CD Input to Speakers Output, Volume Settingfor 500mV in , 8ohms 1W out)Signal to noise ratio preamp out, IHF “A” weighted 110 dB r e 500mV Frequency response, 20 Hz 20 kHz +/-0.1 dB (tone defeat on) +/-0.2 dB (tone defeat off)THD + Noise, SMPTE IM 11 V Tape-out: 10 V CONTROLSTreble +/- 5 dB at 10 kHzBass +/- 8 dB at 100 HzIR IN and OUTInput Resistance 10 kohmsInput VoltageMi n 5 VOutput ResistanceCONTROLLOGICXREDOCEDSLAVE ADDRESSREGISTER &COMPARATORWORD ADDRESSCOUNTERHIGH VOLTAGEGENERATOR,TIMING & CONTROLEEPROMARRAYYDECODERDATAREGISTERClockDI/OACK85674GNDWPSCLSDAVccnMOSFUNCTIONAL BLOCK DIAGRAM12345678NCNCNCVSSVCCNCSCLSDA13ALIGNMENT PROCEDURESI. INITIALA. LOWEST VOLUME ADJUSTMENT3. Connect a oscilloscope t o L channel binding post s.1. Tune t he volume pot t o lowest st at e.2. Input a high volt age signal such as 5V from CD input .4. Observing t he oscilloscope,adjust VR301,make t he out put of speakers become t o t he 5. Adjust ing VR302,make R channel out put become t o t he lowest level by same way. B. IDLING CURRENT3. Connect a DC volt met er t oTP1 and TP2 ,adjust VR22/VR23 for 6mV reading on volt met er.4. Connect a DC volt met er t oTP3 and TP4 ,adjust VR12/VR13 for 6mV reading on volt met er.1. Power onII. FINAL ADJUSTMENTRepeat procedure A,B and C for t he lowest volume level, idling current alignmentand ISC original level respect ively.TP1TP2TP3TP4VR22VR12VR301VR302MAIN BOARDlowest level.C355BEEVR3TP10TP11C. ISC CIRCUIT ORIGINAL ADJUSTINGAdjust t he pot VR3 t o make t he DC volt age of t he point of TP10 t o t he same as TP11 2. Running 5 minut es wit h no signalVR23VR13VR304VR30414.RIC REWOP EEB553C DAN15CV052/n0115DD8UBK25CV052/n0155DD8UBK715C%01 V36/Fu00022815C%01 V36/Fu00022135DR005-151TB235DR005-151TB855RK1365RK22165R001265RK1065RK1955RK1565R001465RK22135REC %5 W5/50.0235R022435R2K2335RM1665R7K4445RK22325CV05/u0033425CV05/u0022!15F25F45F35FV55+V55-V44-V44+V-I.TED CAGIRT%01%014X V052/A3.6123456715BC7NOCV8V0123456735BC65D401BDV14V14V0V5 . 13V5 . 13ETIHWDER915Q5101A025Q5181C95Q5101A015Q5101A715Q5101A815Q5181C1245BC765RK033V44+V44-1225BC12355BC3NOC12365BC3NOC1375BC3NOCV55-V55+35CV004/Fn7.445CFu33.01285BCDERETIHW)no i sreV CAV021 roF(DROC REWOP CA25WSHCTIWS REWOP12355ZC12395BC3NOC!12365ZC3NOC104TDERYRGKLBGROOIV!123456715ZC7NOC12375ZC3NOCremrof snarT12395ZC3NOC1122 tel tuo CA55FAm00525D401BD525CV61/Fu0074625CFu00131215CI0.5-7111SMAV5+!315D4004N1gniR eti r reF21*51*52!otni 031.10S rekaerb l amreht a tresnI remrof snar t fo renni eht)4/1(MARGAID SCITAMEHCS0.1mV TIUCRIC YLPPUS REWOP0.1mV DRAOB REWOP:2-BCP15C660. 1u 20%R62010123456789CZ61CON9GND+18V- 18VLOUTROUTRIN-RIN+LIN+LIN-C62220pR62220R642. 2M 26QRG 902KS2R681KR610430 2%Q65A1312- GR86QY-1882CS2C6422pR6121KQ662SA1201- YR61410KR61610C670. 1u 20%C680. 1u 20%C610100pR61710Q69C3324- GRQ611C3324- GRR6221KR624620C6121nFR61910C61220pR61220R632. 2M 16QRG 902KS2R671KR69430 2%Q63A1312- GRQ672SC2881- YC6322pR6111K46QY-1021AS2R61310KR61510C650. 1u 20%C69100pR61810Q610C3324- GR216QRG-4233CR6231KR625620C6131nFRCA31ADISCRCA31CCDRCA31EVIDEORCA32AAUXRCA32CTUNERRCA32ETAPE2RCA33EREC1RCA33CTAPE1RCA33AREC2R31470R33470R35470C31100pC33100pC35100pR37470R39470R311470C37100pC39100pC311100pR313470R315470R317470C313100pC315100pC317100pC3190. 1u 10%C32447u/35C32347u/35C32547u/25R3213K3 MFR323750 MFR319N. I.R325390 MFR327180 MFC32722n 5%C3290. 1u 5%R3291K5 MFR331390 MF u22.0133C333C%5,V36,u1C335N. I.123SW31A456SW31BRCA34APre- out 1 LC3391u/16RL31BRL32BRL33BRL34BRL35BRL36BRL37BRL38BRCA31BDISCRCA31DCDRCA31FVIDEORCA32BAUXRCA32DTUNERRCA32FTAPE2RCA33FREC1RCA33DTAPE1RCA33BREC2R32470R34470R36470C32100pC34100pC36100pR38470R310470R312470C38100pC310100pC312100pR314470R316470R318470C314100pC316100pC318100pRL31ARL32ARL33ARL34ARL35ARL36ARL37ARL38ATONE DEFEAT SWR3334. 7KR33568C34147u/25C3200. 1u 10%C32647u/25R3223K3 MFR324750 MFR320N. I.R326390 MFR328180