NAD-C715DAB-rec-sm 维修电路原理图.pdf

?For Orignal DAB Module up to S/N A86C71512400 Draft: March 2010RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库1-3CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT INANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONSWITHOUT MANUFACTURER S 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 THEPRODUCT S 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.PRODUCT SAFETY SERVICING GUIDELINES 1-4SERVICING PRECAUTIONSCAUTION : Bef or e ser vicing t he A/ V Receiver cover ed by t hiss er vic e dat a and it s s upplement s and addends , r ead and f ollow t heSAFETY PRECAUTIONS. NOTE : if unf or es een c ir c ums t anc esc r eat e c onf lic t bet ween t he f ollowing s er vic ing pr ec aut ions and anyof t he s af et y pr ec aut ions in t his public at ion, alway s f ollow t he s af et ypr ec aut ions .Remember Safety First:General Servicing Precautions1. Alway s unplug t he A/ V Rec eiver AC power c or d f r om t he ACpower s our c e bef or e:(1) Removing or r einst alling any component , cir cuit boar d,module, or any ot her as s embly .(2) Dis c onnec t ing or r ec onnec t ing any int er nal elec t r ic al plug orot her elec t r ic al c onnec t ion.(3) Connec t ing a t es t s ubs t it ut e in par allel wit h an elec t r oly t icc apac it or .Caution : A wr ong par t s ubs t it ut ion or inc or r ec t polar it y ins t allat ionof elec t r oly t ic c apac it or s may r es ult in an explos ion hazar d.2. Do not s pr ay c hemic als on or near t his A/ V Rec eiver or any of it sas s emblies .3. Unles s s pec if ied ot her wis e in t his s er vic e dat a, c lean elec t r ic alc ont ac t s by apply ing an appr opr iat e c ont ac t c leaning s olut ion t ot he cont act s wit h a pipe cleaner , cot t ont ipped swab, orc ompar able s of t applic at or .Unles s s pec if ied ot her wis e in t his s er vic e dat a, lubr ic at ion ofc ont ac t s is not r equir ed.4. Do not def eat any plug/ s oc ket B+ volt age int er loc ks wit h whic hins t r ument s c over ed by t his s er vic e manual might be equipped.5. Do not apply AC power t o t his A/ V Rec eiver and/ or any of it selec t r ic al as s emblies unles s all s olid-s t at e devic e heat s inks ar ec or r ec t ly ins t alled.6. Alway s c onnec t t es t ins t r ument gr ound lead t o t he appr opr iat egr ound bef or e c onnec t ing t he t es t ins t r ument pos it ive lead. Alway sr emove t he t es t ins t r ument gr ound lead las t .Insulation Checking ProcedureDis c onnec t t he at t ac hment plug f r om t he AC out let and t ur n t hepower on. Connec t an ins ulat ion r es is t anc e met er (500V) t o t heblades of t he at t ac hment plug. The ins ulat ion r es is t anc e bet weeneac h blade of t he at t ac hment plug and ac c es s ible c onduc t ive par t s(Not e 1) s hould be mor e t han 1M-ohm.Note 1 : Ac c es s ible Conduc t ive Par t s inc luding Met al panels , Inputt er minals , Ear phone jac ks , et c .Electrostatically Sensitive (ES) DevicesSome s emic onduc t or (s olid s t at e) devic es c an be damaged eas ily byst at ic elect r icit y. Such component s commonly ar e calledElec t r os t at ic ally Sens it ive (ES) Devic es . Examples of t y pic al Esdevic es ar e int egr at ed c ir c uit s and s ome f ield ef f ec t t r ans is t or s ands emic onduc t or c hip c omponent s .The f ollowing t echniques should be used t o help r educe t heinc idenc e of c omponent damage c aus ed by s t at ic elec t r ic it y .1. Immediat ely bef or e handling any s emic onduc t or c omponent ors emic onduc t or -equipped as s embly , dr ain of f any elec t r os t at icchar ge on your body by t ouching a known ear t h gr ound.Alt er nat ively, obt ain and wear a commer cially availabledis c har ging wr is t s t r ap devic e, whic h s hould be r emoved f orpot ent ial s hoc k r eas ons pr ior t o apply ing power t o t he unit undert es t .2. Af t er r emoving an elec t r ic al as s embly equipped wit h ES devic es ,plac e t he as s embly on a c onduc t ive s ur f ac e s uc h as aluminumf oil, t o pr event elec t r os t at ic c har ge buildup or expos ur e of t heas s embly .3. Us e only a gr ounded-t ip s older ing ir on t o s older or uns older ESdevic es .4. Use only an ant ist at ic solder r emoval device. Some solderr emoval devices not classif ied a “ ant i-st at ic” can gener at eelec t r ic al c har ges s uf f ic ient t o damage ES devic es .5. Do not use f r eonpr opelled chemicals. These can gener at eelec t r ic al c har ge s uf f ic ient t o damage ES devic es .6. Do not r emove a r eplacement ES device f r om it s pr ot ect ivepac kage unt il immediat ely bef or e y ou ar e r eady t o ins t all it . (Mos tr eplac ement ES devic es ar e pac kaged wit h leads elec t r ic allyshor t ed t oget her by conduct ive f oam, aluminum f oil, orc ompar able c onduc t ive mat er ial).7. lmmediat ely bef or e r emoving t he pr ot ec t ive mat er ial f r om t heleads of a r eplac ement ES devic e, t ouc h t he pr ot ec t ive mat er ial t ot he c has s is or c ir c uit as s embly int o whic h t he devic e will beins t alled.Caut ion : Be s ur e no power is applied t o t he c has s is or c ir c uit , andobs er ve all ot her s af et y pr ec aut ions .8. Minimize bodily mot ions when handing unpac kaged r eplac ementES devic es . (Nor mally har mles s mot ion s uc h as t he br us hingt oget her of y our c lot hes f abr ic or t he lif t ing of y our f oot f r om ac ar pet ed f loor c an gener at e s t at ic elec t r ic it y s uf f ic ient t o damagean ES devic e.)1-5SPECIFICATIONS (C715)AMPLIFIER SECTION Power output Stereo Mode 25W (6 ohms within rated distortion, 1kHz) IHF dynamic power (6 ohms) 28W Total harmonic distortion at rated power 0.15% Damping factor (6 ohms) 102 Input sensitivity and impedance (Tape IN) 370mV/27k Frequency response +1 dB/-3dB (Ref. 1 kHz, 10Hz 80kHz) Signal/noise ratio, 95dB (Ref. rated power/ 6 ohms A-WTD) Signal/noise ratio 80dB (Ref. 1W / 6 ohms A-WTD)TUNER SECTIONAM SECTION Tuning range 520kHz - 1710kHz (North America version, 10kHz steps) 522kHz -1629kHz (Europe version, 9kHz steps) Usable sensitivity 60dBuV S/N ratio 40dB Total Harmonic Distortion 1.5% Selectivity 25dB Frequency response -6dB (Ref. 400Hz, 80Hz 2.2kHz)FM SECTION Tuning range 87.50MHz 108MHz (50kHz steps) Usable sensitivity, MONO 10dBuV S/N Ratio MONO 60dB S/N Ratio STEREO 55dB Total Harmonic Distortion, MONO 0.3% Total Harmonic Distortion, STEREO 0.5% Frequency response -3dB (Ref. 1 kHz, 30Hz 12kHz) Channel Separation 35dB RDS decode sensitivity 29dBuVCD SECTION Output level 1.16V Frequency response (ref. 0dB 1kHz, 20Hz-20kHz) +1dB Total harmonic distortion (ref. 1kHz, VIDEO OUT) 0.04% Signal/Noise ratio (A-weighted, ref. 1kHz VIDEO OUT) 100dB Channel balance (ref. 0dB 1kHz) 0.5dB Dynamic range (A-WTD, VIDEO OUT) 82dB Channel separation 78dB (1kHz) 78dB (10kHz)PHYSICAL SPECIFICATIONS Dimensions (W x H x D) 213 x 103 x 324 mm (Net) 213 x 116 x 362 mm (Gross) Net weight 4.5kg Shipping weight 6.0kgNote: Gross dimensions include feet, extended buttons and rear panel terminals.Specifications are subject to change without notice. For updated documentation and features, please log onto www.NAD for the latest information about C 715.1-6SPECIFICATIONS (C715 DAB)AMPLIFIER SECTION Power output Stereo Mode 25W (6 ohms within rated distortion, 1kHz) IHF dynamic power (6 ohms) 28W Total harmonic distortion at rated power 0.15% Damping factor (6 ohms) 102 Input sensitivity and impedance (Tape IN) 370mV/27k Frequency response +1 dB/-3dB (Ref. 1 kHz, 10Hz 80kHz) Signal/noise ratio, 95dB (Ref. rated power/ 6 ohms A-WTD) Signal/noise ratio 80dB (Ref. 1W / 6 ohms A-WTD)TUNER SECTIONAM SECTION Tuning range 520kHz -1710kHz (North America version, 10kHz steps) 522kHz -1629kHz (Europe version, 9kHz steps) Usable sensitivity 60dBuV S/N ratio 40dB Total Harmonic Distortion 1.5% Selectivity 25dB Frequency response -6dB (Ref. 400Hz, 80Hz 2.2kHz)FM SECTION Tuning range 87.50MHz 108MHz (50kHz steps) Usable sensitivity, MONO 10dBuV S/N Ratio MONO 60dB S/N Ratio STEREO 55dB Total Harmonic Distortion, MONO 0.3% Total Harmonic Distortion, STEREO 0.5% Frequency response -3dB (Ref. 1 kHz, 30Hz 12kHz) Channel Separation 35dB RDS decode sensitivity 29dBuVDAB SECTION Tuning range Band III 174MHz 240MHz Maximum signal -3dBm Sensitivity -96dBm Adjacent Channel Rejection -35dB Audio Output Stereo 2.5Vp-p Optical S/PDIF 24 bit sample resolution 48kHz sample rateCD SECTION Output level 1.16V Frequency response (ref. 0dB 1kHz, 20Hz-20kHz) +1dB Total harmonic distortion (ref. 1kHz, VIDEO OUT) 0.04% Signal/Noise ratio (A-weighted, ref. 1kHz VIDEO OUT) 100dB Channel balance (ref. 0dB 1kHz) 0.5dB Dynamic range (A-WTD, VIDEO OUT) 82dB Channel separation 78dB (1kHz) 78dB (10kHz)PHYSICAL SPECIFICATIONS Dimensions (W x H x D) 213 x 103 x 324 mm (Net) 213 x 116 x 362 mm (Gross) Net weight 4.5kg Shipping weight 6.0kgNote: Gross dimensions include feet, extended buttons and rear panel terminals.Specifications are subject to change without notice. For updated documentation and features, please log onto www.NAD for the latest information about C 715 DAB.DISASSEMBLYREMOVAL OF TOP COVERREMOVAL OF FRONT PANEL1-7?PRINCIPAL PARTS LOCATIONC715DABCC715AH & C715C1-8 CJDKSL2130CCMZ CJDKSL2130CCMZDAB Module up to S/N A86C71512400C715AH EXPLODED VIEW (120V North American version)1-91-10 CD Mechansim Sony*ClassificationTime of application POWER PCBPOWER PCB ASSYDAB MODULERear PanelWasherNutCD Mechanism Program*Chart B C715 change LISTC715C, C715AH, C715DABC CD Mechanism change2008.10 StartCJDWSL11VF SanyoNAD C515/C715 FIRMWARE LOADERChange both mechanism and program simultaneously. The new Sanyo mechanism will not work with a servowhich has original Sony firmware installed. C715C EXPLODED VIEW (230V European version without DAB receiver)1-111-12CD Mechanism Sony*ClassificationTime of applicationPOWER PCBPOWER PCB ASSYDAB MODULERear PanelWasherNutCD Mechanism Program*Chart B C715 change LISTC715C, C715AH, C715DABC CD Mechanism change2008.10 StartCJDWSL11VF Sanyo NAD C515/C715 FIRMWARE LOADERChange both mechanism and program simultaneously. The new Sanyo mechanism will not work with a servowhich has original Sony firmware installed. .C715DABC EXPLODED VIEW (230V European versio