NAD-C356BEE-int-sm 维修电路原理图.pdf

NADSERVICE MANUALC 356BEESTEREOAMPLIFIERC 356BEE 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- 6 SPECIFICATIONS7- 8 WIRING DIAGRAM9 BLOCK DIAGRAM. . . . 10- 13 ALIGNMENT PROCEDURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 SCHEMATICS. . . . 15- 18 PCB LAYOUT. 19- 24TROUBLE SHOOTING GUIDE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ELECTRICAL PARTS LIST. 26- 36 EXPLODED VIEW. . 37 EXPLODED VIEW PARTS LIST. . . . 38 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? ? ? ? ? ? ? ? ? ?5? ? ? ? ? ? ? ? ? ? ? ? ? ?6?7?8CB21(-55V)(-55V)(+55V)(+55V)WHITEWHITEREDREDCB1 1CZ13CZ1 2(GND)CZ22GND(+55V)REDCB51 0CB51CB52CB53CB58CB54CB55CB56CB59CB57CB4 7CB45CZ4 5(-55V)WHITECZ11CB1 2CB22CZ76CZ71CZ75P-GNDP-GNDCZ37CB37CZ61CB33CB32CZ62(-55VA)(+55VA)CB39CB4 8CB36CB34CB31CB35CB78CZ78CZ77CZ79WIRING DIAGRAMUL1015#16AWGTO AC INLETUL1672#18AWGTO MAIN TRANSFORMERUL1672 AWG#18AMP SMD BOARDINSERTUL1015#22AWGUL3266#18AWGUL1672#18AWGUL1672#14AWGUL1672#22AWGPOWER BOARDTO AC OUTL ET(ONLY 120V VERSION)TO POWER SWITCHUL1672#18AWGUL1672#18AWGUL1007#26AWGUL1672#18AWGPHONE BOARDAMP SMD BOARDINSERTUL2468#26AWGKEY BOARDMAIN BOARD TONE+VOLUME BOARD FPC-1.25-13PUL2468#26AWGPREAMP SMD BOARDINSERTINSERTPREAMP SMD BOARDUL2547#26AWGTO MDC/PP375/DAC MODULEFPC-1.25-12PUL2547#24AWGUL 2854#26AWGTO PC RS232 PORTRS232 BOARD9MDC/PP375/DAC/DISC INRear/Front panel MP INCD INAUX INTUNER INTAPE1 INTAPE2 INRELAYS SWITCHINPUT SELECT CIRCUITMCUSTC12C5A08S2RS232 INTERFACE(MAX232D)DB9 SOCKETVOLUME CONTROL(REMOTE)RT33PREAMP IN MODULERT31RT32RT34RL311BASSTREBLEBALANCETONE DEFEAT(CONTROL BY MCU)PREAMP OUT MODULEREC1REC2PREAMP OUT 1/2POWER AMP CIRCUIT L/RPOWER AMP MODULES L/RSOFTCLIPPING CONTROL CIRCUITISC CONTROL CIRCUITPROTECT CIRCUITSPEAKERS OUTRELAYS FOR SPEAKERS OUT HEADPHONE OUTIR IN/OUT12 TRIGGER OUTPOWER SUPPLY(+/-55V,+/-26V,+/-18V,+12V,+5V)INPUT SELECT KEYSCONTROL CIRCUIT+/-55V,+/-18V+26V+12V+/-55V,+/-18V+/-55V+/-18V+/-18V+/-12V+5V+5V+5V+5VBLOCK DIAGRAM10C7927pC71027pY7111.0592MHz+5VPHONE71Ipod IN231IC72IS1U60LIR RECEIVERC1+1V+2C1-3C2+4C2-5V-6T2OUT7R2IN8R2OUT9T2IN10T1IN11R1OUT12R1IN13T1OUT14GND15VCC16IC76MAX232DRedBlueD7173LEDAmberP1.5/MOSI/ADC51P1.6/MISO/ADC62P1.7/SCLK/ADC73P4.7/RST4P3.0/RXD5P4.3/CCP1/TXD2/SCLK6P3.1/TXD7P3.2/INT08P3.3/INT19P3.4/T0/CLKOUT010P3.5/T1/CLKOUT111P3.6/WR12P3.7/RD13XTAL214XTAL115GND16P4.0/SS17P2.0/A818P2.1/A919P2.2/A1020P2.3/A1121P2.4/A1222P2.5/A1323P2.6/A1424P2.7/A1525P4.4/NA26P4.5/ALE27P4.1/ECI/MOSI28P4.6/RST2/EX_LVD29P0.7/AD730P0.6/AD631P0.5/AD532P0.4/AD433P0.3/AD334P0.2/AD235P0.1/AD136P0.0/AD037VCC38P4.2/CCP0/RXD2/MISO39P1.0/ADC0/CLKOUT240P1.1/ADC141P1.2/RXD242P1.3/TXD243P1.4/ADC444IC73STC12C5A08S2-35I-LQFP44RXDTXD1234567891110CZ77DB 9To pre mute circuitVolume controlcircuitModule DetectReset circuit+5VPower LEDcontrol circuitBlue LED controlRed LED controlInput select control circuitInput controlFront panel MP detectk ey s circuitSPK A/B control circuitTune def eat on/of f control circuitStandby control circuitTo MDC TXDTo MDC RXDProtection detectMICROPROCESSOR CONNECTION DIAGRAM11STC12C5A08S2 KEY BOARD IC73PORT 2 DRIVERSPORT 2LATCHP2.0 - P2.7FLASHPORT 0LATCHRAMPROGRAMADDRESSREGISTERBUFFERPCINCREMENTERPROGRAMCOUNTERDUAL DPTRINSTRUCTIONREGISTERBREGISTERINTERRUPT, SERIAL PORT,AND TIMER BLOCKSSTACKPOINTERACCTMP2TMP1ALUPSWTIMINGANDCONTROLPORT 1 DRIVERSP1.0 - P1.7PORT 3LATCHPORT 3 DRIVERSP3.0 - P3.7OSCGNDVCCPSENALE/PROGEA / VPPRSTRAM ADDR.REGISTERPORT 0 DRIVERSP0.0 - P0.7PORT 1LATCHWATCHDOGISPPORTPROGRAMLOGIC1212345679801112131415161+1C+V-1C+2C-2C-VTUO2TTUO2RNI2RNI2TNI1TTUO1RTUO1TNI1RDNGCCVMAX232D67CI :DRAOBYEKsmhoK5smhoK5smhoK004smhoK004Fu1 . 0Fu1 . 0fu1 . 0Fu1 . 0Fu01TUPNI V5+CCVNI1TNI2TTUO1RTUO2RNI2RNI1RTUO1TTUO2T2T1T1R2R51DNG123456789011121314161-V+V+1C-1C-2C+2CV01+ ot V5+re l buoD egat l oVret revnI egat l oVV01- ot V01+13lowes t lev el.VR304C356BEE TUNE +VOLUME BOARDVR303VR12VR13TP4TP3Repeat proc edure A,B and C for the lowes t v olume lev el, idling c urrent alignment5. Adj us ting VR302,mak e R c hannel output bec ome to the lowes t lev el by s ame way . Adj us t the pot VR3 to mak e the DC v oltage of the point of TP10 to the s ame as TP11 C356BEE MAIN BOARD4 . Con nec t a DC v oltmeter toTP3 an d TP4 ,adj us t VR12/VR13 for 6mV readin g on v oltmeter.3. Connec t a DC v oltmeter toTP1 and TP2 ,adj us t VR22/VR23 for 6mV reading on v oltmeter.TP2TP1VR23VR22VR301VR302TP11VR3TP10and ISC original lev el res pec tiv ely .B. IDLING CURRENTC.ISC CIRCUIT ORIGINAL ADJ USTINGII. FINAL ADJ USTMENT1. Power on2. Run nin g 5 minutes with n o s ignal3. Connec t a os c illos c ope to L c han nel bindin g pos ts .2. Input a high v oltage s ignal s uc h as 5 V from CD in put.4. Obs erv ing the os c illos c ope,adj us t VR301,mak e the output of s peak ers bec ome to the 1. Tune the v olume pot to lowes t s tate.ALIGNMENT PROCEDURESA. LOWEST VOLUME ADJ USTMENTI. INITIAL14(For 120VAC Version)AC POWER CORDSW52POWER SWITCH123CZ55!123CZ56CON3REDGRYBLKORGVIO!1234567CZ51CON7123CZ57CON3123CZ59CON31122AC outlet !1234567891011C356 MAIN TRANS.NAD C356BEE POWER CIR.C5110n/250VD51KBU8DC5210n/250VD55KBU8DC51722000uF/63V 10%C51822000uF/63V 10%D531BT151-500RD532BT151-500RR5581KR56322KR561100R5621KR5601KR5591KR565100R56422KR5310.05/5W 5% CER532220R5342K2R5331MR5664K7R54422KC5232200u/63VC5242200u/63V!12F51+55V-55V-55VA+55VAI-VAC DET.TRIG10%10%2.5A/250V f or 230V mains1234567CB51CON78V0V12345678910CB53D56DB10441V41V0V32V32VWHITEREDQ519A1015Q520C1815Q59A1015Q510A1015Q517A1015Q518C181512CB54R567330K+55VA-55VA12CB52123CB55CON3123CB56CON31