NAD-S170-int-sm 维修电路原理图.pdf

SERVICE MANUALS170S170A/V SURROUNDSOUNDPREAMPLIFIERA/V SURROUNDSOUNDPREAMPLIFIERRadioFans.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.RadioFans.CN 收音机爱 好者资料库SERVICING 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.)CONTENTSFRONT PANEL / REAR PANEL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-25ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-35EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxPACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39SERVICE SAFETY PRECAUTIONS1. Replacing the FusesCAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE.REFERENCE NO.PART NUMBERDESCRIPTIONFUSE1*C 1.6A 250V Time LagFUSE2*C 1A 250V Time LagFUSE3*C 2A 250V Time LagNOTE:*C : European version only2. Safety-check outBefore returning the product to the customer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit.Parts marked with the symbol are critical with regard to the risk of fire and electric shock. Replace only with parts recommended by the manufacturer.5120-0050-05100-1020-1B5120-0065-0!18141310151613564891234564 OUT5 OUT6 OUTMON OUTVIDEO 1VIDEO 2VIDEO 3VIDEO 4VIDEO 5VIDEO 6AUDIO INPUTCDAUXTUNERMULTI SOURCEOUTTAPE MONITORL LINININOUTOUTOUTEXTERNAL 7.1 OUTPUTSEXTERNAL 5.1 INPUTS12V TRIGGERS OUTRS 232DIGITAL 4DIG OUTDIGITAL 1DIGITAL 2DIGITAL 3COMPONENT VIDEO CbCrLEFT B (mono)LS LS Y NAD LINK OUTOPTICAL IN 1OPTICAL IN 2 OPTICAL OUTCENTERCENTERFRONT LFRONT LININS VIDEO 4 INS VIDEO 6 IN S VID 5 OUTMONITOR OUTS VIDEO 2 IN S VIDEO 5 IN S VID 4 OUT S VID 6 OUT S VID 3 IN S VID 1 IN VIDEO 4VIDEO 5VIDEO 6AC MAINS INPUTVIDEO INPUTL LR RRPLAYRECORDRIGHT BRS RS FRONT RFRONT RSUBSUBAUDIO OUT132271711121317141112 A/V Surround Sound Preamplifier S170NADTONEMULTI SOURCEBRIGHTNESSLEVELSTAPE MONITOR234859610AUDIOMODESPEAKERSDELAYVIDEOVOLUME (SET UP)VOLUME (SET UP)The graphic symbol of a lightning flash with an arrow point within a triangle signifies that there is dangerous voltage within the unit and it posses a hazard to anyone removing the cover to gain access to the interior of the unit. Only qualified service personnel should make such attempt.The graphic symbol of an exclamation point within an equilateral triangle warns a user of the device that it is necessary to refer to the instruction manual and its warnings for proper operation of the unit.1. POWER SWITCH6. MULTI SOURCE11. TONE2. POWER INDICATOR7. SPEAKERS12. MODE3. AUDIO INPUT SELECTOR8. DELAY13. VOLUME/SETUP CONTROL4. VIDEO INPUT SELECTOR9. LEVELS14. DISPLAY5. TAPE MONITOR10. BRIGHTNESS1. VIDEO INPUTS7. COAXIAL DIGITAL INPUTS/OUTPUT13. TAPE INPUT/OUTPUT2. VIDEO OUTPUTS8. OPTICAL DIGITAL INPUTS/OUTPUT14. MULTI SOURCE OUTPUT3. S-VIDEO INPUTS9. RS-23215. EXT. 7.1 OUTPUTS4. S-VIDEO OUTPUTS10. AUDIO INPUTS16. EXT. 5.1 INPUTS5. COMPONENT VIDEO INPUTS/OUTPUTS11. AUDIO OUTPUTS17. 12V TRIGGET OUTPUTS6. NAD LINK INPUT/OUTPUT12. CD/AUX/TUNER INPUTS18. AC INLETREAR PANEL CONNECTIONSFRONT PANEL CONTROLSNL EVIDEO BOARDMAIN BOARDDECODER BOARDVFLENCODERFRONT PANEL BOARDSWITCHINGPOWER SUPPLYPOWER SWITCH BOARDAC INLETCHASSISABC+15VAGND-15V+5VDDGND+15VGND-15V+5VDEARTHNEUTRALLIVEX261X27X241X191111X301X161X1411X11X13S-31CN1S-1S-21P2AP1AWIRING DIAGRAMBNC CONNECTORBROWNBROWNBLUEYEL-GRNYEL-GRNGRAYGREENYELLOWGREENREDREDBLACK20-PIN RIBBON8-PIN RIBBON20-PIN RIBBON20-PIN RIBBONSPECIFICATIONSSTANDARD SETTINGSSURROUND BACK LEFT & RIGHT1. Volume = 0dB1. Dolby 1.0 test disc (5.1 input)2. Tone Controls = 0dB2. Choose titles with SL and SR signals3. LFE Channel = 0dB3. Put unit to 6.1 mode setting4. Bass Limiter = Off5. Channel Levels = 0dB6. Delays = 0 meters/ft7. Speakers = Large8. Subwoofer = YesDOLBY DIGITAL MODE: Dolby test disc 1.01. Output levelAll 7Title 30997Hz0.22 0.03 V2. Channel DifferenceAll 5Tilte 30997Hz0 0.5 dBLTitle 43200Hz-20kHz0 0.2 dBRTitle 45200Hz-20kHz0 0.2 dBCTitle 44200Hz-20kHz0 0.2 dBSLTitle 46200Hz-20kHz0 0.2 dBSRTitle 47200Hz-20kHz0 0.2 dBSubTitle 4820Hz-80Hz0 0.2 dBLTitle 65997Hz0.01%RTitle 67997Hz0.01%CTitle 66997Hz0.01%SLTitle 68997Hz0.01%SRTitle 69997Hz0.01%SubTitle 7030Hz0.03%5. S/N Ratio, A-wtd 20kHz LPFAll 5Title 6365dB6. Channel Separation 20kHz LPFAll 5Title 65-69997Hz65dBDTS MODE: DTS Consumer Product Evaluation Test DiscAll 5Track 211kHz0.22 0.03 VSubTrack 1530Hz+9.4 1 dB2. Channel DifferenceAll 5Track 211kHz0 0.5 dBLTrack 2620Hz-20kHz0 0.2 dBRTrack 2720Hz-20kHz0 0.2 dBCTrack 3020Hz-20kHz0 0.5 dBSLTrack 2820Hz-20kHz0 0.5 dBSRTrack 2920Hz-20kHz0 0.5 dBLTrack 101kHz0.01%3. Frequency Response Title 30 for reference. For Sub, reference is start of title 484. THD With audio BPF4. THD 1. Output level For Sub, ref. L out at track 103. Frequency Response Track 21 for referenceRTrac