Denon-DRA295-rec-sm维修电路原理图.pdf

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1、Hi-Fi AM-FM Stereo ReceiverSERVICE MANUALMODELDRA-295AM-FM STEREO RECEIVERSAFETY PRECAUTIONS. 36SPECIFICATIONS . 36DISASSEMBLY . 37ADJUSTMENT. 38,39BLOCK DIAGRAM . 40LEVEL DIAGRAM . 41SEMICONDUCTORS .4246PRINTED WIRING BOARDS .4751NOTE FOR PARTS LIST. 52PARTS LIST OF P.W.B. UNIT ASSY .5359EXPLODED V

2、IEW . 60PARTS LIST OF EXPLODED VIEW . 61,62PACKING VIEW . 63 TABLE OF CONTENTS ?Some illustrations using in this service manual are slightly different from the actual set.PARTS LIST OF PACKING & ACCESSORIES . 63WIRING DIAGRAM. 64SCHEMATIC DIAGRAMS .6569(1/5)INPUT UNIT . 65VIDEO UNIT . 65(2/5)VOLUME

3、UNIT . 66CONNECTOR UNIT . 66(3/5)MAIN UNIT . 67(4/5)FRONT UNIT. 68SWITCH UNIT . 68POWER SW/HP UNIT. 68(5/5)TUNER UNIT. 69For U.S.A., Canada& Europe model14-14, AKASAKA 4-CHOME, MINATO-KU, TOKYO 107-8011 JAPANTelephone: 03 (3584) 8111X0118 842 NC 0108RadioFans.CN 收音机爱 好者资料库36DRA-295SPECIFICATIONS? ?

4、? ? ? Audio Section(Power Amplifier)Rated output:50W + 50W (8/ohms, 20Hz 20kHz with 0.08% T.H.D.)Output terminals:A or B4 to 16/ohmsA + B8 to 16/ohms(Analog)LINE input - PRE OUT Input sensitivity/input impedance:200mV/47k/kohms Frequency response:10Hz 50kHz: 1.5dB S/N ratio:98 dB (IHF-A weighted) To

5、tal harmonic distortion:0.009% (3dB at rated output, 8/ohms) (1kHz) Rated output:1.2V? ? ? ? ? Video Section (U.S.A. & Canada model)(Standard Video Jacks)Input/output level and impedance:1V p-p, 75/ohmsFrequency response:5Hz 10MHz +1, 3dB? ? ? ? ? Tuner SectionFM (note: V at 75/ohms, 0dBf = 110-15W)

6、AMReceiving range:U.S.A. & Canada model87.50MHz 107.90MHz520kHz 1710kHzEurope model87.50MHz 108.00MHz522kHz 1611kHzUsable sensitivity:1.4V (14.2dBf)18V50dB quieting sensitivity:MONO2.8V (20.2dBf)STEREO23V (38.5dBf)S/N ratio:MONO80dB (IHF-A weighted)STEREO75dB (IHF-A weighted)Total harmonic distortio

7、n:MONO0.15% (1kHz)STEREO0.3% (1kHz)? ? ? ? ? GeneralPower supply:AC120V, 60Hz (For U.S.A. & Canada model)AC230V, 50Hz (For Europe model)Power consumption:3.0A (For U.S.A. & Canada model)150W (For Europe model)Maximum external dimensions:434 (W) 147 (H) 417 (D) mm (17-3/32 5-25/32 16-27/64)Weight:9.2

8、kg (20lbs 4.5oz)? ? ? ? ? Remote Control UnitRC-895 (For U.S.A. & Canada model)RC-907 (For Europe model)Batteries:R06P/AA Type (two batteries)External dimensions:50 (W) 179 (H) 22 (D) mm (1-31/32 7-3/64 55/64)Weight:125g (Approx. 7.5 oz) (including batteries)* For purposes of improvement, specificat

9、ions and design are subject to change without notice.SAFETY PRECAUTIONSThe following check should be performed for the continued protection of the customer and service technician.LEAKAGE CURRENT CHECKBefore returning the unit to the customer, make sure you make either (1) a leakage current check or

10、(2) a line to chassisresistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of thepower cord is less than 460 kohms, the unit is defective.RadioFans.CN 收音机爱 好者资料库37DRA-295Europe model1. Remove cord bushing 5 from the Rear Panel.2. Remove 17 s

11、crews 6.3. Detach the Rear Panel in the arrow direction.DISASSEMBLY (Follow the procedure below in reverse order when reassembling)Front Panel1. Remove 4 screws 3 and 2 screws 4.2. Detach the Front Panel in the arrow direction.Rear PanelU.S.A. & Canada model1. Remove cord bushing 5 from the Rear Pan

12、el.2. Remove 23 screws 6.3. Detach the Rear Panel in the arrow direction.Top Cover21134Front Panel566666Rear Panel56Rear PanelTop CoverRemove 6 screws 1 and 3 screws 2, detach the Top Coverin the arrow direction.38DRA-295FM ALIGNMENTInputOutputAdjustmentStepAlignmentItemTuningFrequencySettingTypeFre

13、quencyInputLevelModulationCouplingTypeConnect toPointsAdjust to1CenterAdjustment98.1MHz(98.0MHz)FM SSG98.1MHz60dBMono1kHz 100%AntennaTerminalDigitalVoltmeterR471T402 50mV2Distortion98.1MHz(98.0MHz)FM SSG98.1MHz60dBMono1kHz 100%AntennaTerminalDistortionMeterOutputTerminal (L)T403MinimumDistortion3Rep

14、eat Steps 1 and 24Signal Level98.1MHz(98.0MHz)FM SSG98.1MHz20dBOFFAntennaTerminalLight “TUNED” onFL DisplayVR402ADJUSTMENTTuner SectionCONNECTION DIAGRAM OF MEASURING INSTRUMENTS? FMSTEREOMODULATORFM SSGDigitalVoltmeter75ohmT402T403IC402VR402TUNER BDR47120+1410dB? AMT402T403IC402TUNER BDR471VR401AM

15、ALIGNMENTOutputAdjustmentStepAlignmentItemFrequencyInputTypeConnect toPointsAdjust toRemarks1Signal Level999 (1000)kHzAM SSGVR401Light “TUNED” onFL DisplaySSG OUTPUT74dB (EMF)39DRA-295Audio SectionIdling CurrentRequired measurement equipment : DC VoltmeterPreparation(1)Avoid direct blow from an air

16、conditioner or an electric fan, and adjust the unit at normal room tempereture15 C 30 C (59 F 86 F).(2)PresettingG POWER (Power sourse switch)OFFG SPEAKER (Speaker terminal)No load (Do not connect speaker, dummy resistor, etc.)Adjustment(1)Remove top cover and set VR101, VR102 on Amp. Unit at full c

17、ounterclockwise ( ) position.(2)Connect DC Voltmeter to test points (Lch: TP101, Rch: TP102).(3)Connect power cord to AC Line, and turn power switch ON.(4)Presetting.MASTER VOLUME : - counterclockwise ( min.)FUNCTION: CD(5)Within 2 minutes after the power on, turn VR101 clockwise ( ) to adjust the T

18、EST POINT voltage to 1.5 mV 0.5 mVDC.(6)After 10 minutes from the preset above, turn VR101 to set the voltage to 2.5 mV 0.5 mV DC.(7)Adjust the Variable Resistors of other channels in the same way.VR101TP101VR102TP102LchRch87654321ABCDEDRA-29540BLOCK DIAGRAM12348INPUTBUFFERAMP11CD111MAIN VOLPOWER AM

19、PMUTEATT11MAINCD INSUB ROOM(200mV)(200mV)- 18dB- 35.5dBVOL 00+15.5dB26dB+16.2dBSPK OUT2.83V(1W/8ohms)H/P OUT47mV(1W/8ohms)SUB ROOM OUT1.2VSPK OUTH/P OUTSUB OUT87654321ABCDEDRA-29541LEVEL DIAGRAM1303150518081100CXP82840-321Q Terminal FunctionSEMICONDUCTORS? ? ? ? ? ICsCXP82840-321Q (IC900)1G2/A1OFL G

20、022G1/A0OFL G013NC(Vdd)INC(Connect to Vdd)4POWER DOWNIAC OFF Detect5ENC VOLUME UPIEncoder VOLUME UP6RDS CLOCKIRDS clock input(TDA7330)7ENC VOLUME DOWNIEncoder VOLUME DOWN8REMOCONIRemote signal input.9PROTECTIONIProtection detecting input.10SUB ZONE2 LEDONot used.11SUB ZONE1 LEDONot used.1262446 LATC

21、HOElectronic volume control.(M62446 LATCH)13FUNCTION SW 1 CEOFunction IC control.(TC9273 ST)14FUNCTION 1/2 DATAOFunction IC control.(TC9273 DATA)15FUNCTION 1/2 CLOCKOFunction IC control.(TC9273 CLOCK)16VOLUME,PLL,4094,DATAOLC72131,M62446,TC4094(DATA)17VOLUME,PLL,4094,CLOCKOLC72131,M62446,TC4094(CLOC

22、K)18TUNEDITUNED signal in.19STEREOISTEREO signal in.20IF COUNTIPLL data in.(LC72131)21TUNER MUTEOTuner mute output.22PLL CEOLC72131(CE)234094 STBOTC4094(STB)24VOLUME STBONot used.25SUB 1 MUTEONot used.26MAIN MUTEOMAIN,Subwoofer mute output.27POWER RELAYOPower supply relaycontrol.28AV REF.IReference

23、voltage input for A/D converter.291511 DATAONot used.30RDS DATAIRDS data input(TDA7330)31KEY IN 1IKey input 132KEY IN 2IKey input 233KEY IN 3IKey input 334STEP OPTIONIArea select.35SET OPTIONIModel select.36SPEAKER A LED 1OSPEAKER A LED indicator control37A VSSIA/D converter GND.38RESETILow-level ac

24、tive,system reset.39EXTALIEXTAL(10MHz)40XTALOXTAL(10MHz)41VSSIGND42NC(TX)ONot used.43G(TEX)IGND44VDDIVcc SUPPLY.45VFDPIFDP voltage supply.PinNo.Pin NameFunctionI/OPinNo.Pin NameFunctionI/O46SPEAKER B LED 2OSPEAKER B LED indicator control47STBY LED 3OSTANDBY LED indicator control48PD2/A53OFL P3849PD3

25、/A52OFL P3750PD4/A51OFL P3651PD5/A50OFL P0152PD6/A49OFL P0253PD7/A48OFL P0354PF0/A47OFL P0455PF1/A46OFL P0556PF2/A45OFL P0657PF3/A44OFL P0758PF4/A43OFL P0859PF5/A42OFL P0960PF6/A41OFL P1061PF7/A40OFL P1162PG0/A39OFL P1263PG1/A38OFL P1364PG2/A37OFL P1465PG3/A36OFL P1566PG4/A35OFL P1667PG5/A34OFL P176

26、8PG6/A33OFL P1869PG7/A32OFL P1970PH0/A31OFL P2071PH1/A30OFL P2172PH2/A29OFL P2273PH3/A28OFL P2374PH4/A27OFL P2475PH5/A26OFL P2576PH6/A25OFL P2677PH7/A24OFL P2778A23OFL P2879A22OFL P2980A21OFL P3081A20OFL P3182A19OFL P3283A18OFL P3384A17OFL P3485A16OFL P3586G16OFL G1687G15OFL G1588G14OFL G1489VddIVcc

27、 SUPPLY.90G13OFL G1391G12OFL G1292G11OFL G1193G10OFL G1094G9OFL G0995G8OFL G0896G7OFL G0797G6OFL G0698G5OFL G0599G4OFL G04100G3OFL G038DRA-295421_CXP82840.p6501/08/18, 10:43Page 42-43Adobe PageMaker 6.5J/Win43DRA-295LA1266 (IC402)10413819151718142122GNDVcc511IFBUFFERIFBUFFER2FM - IF6Q.D.7REG23OSCOSC

28、BUFFER24NARROWS-METERS-METER16LEDDRIVERRFMIX1220AM-IFDETAGCPOSTAMP913AM-IFFM-IFFM-INAM-IN 20191817161514131298756121LA3401 (IC403)22VOLREGOSCSYMMETRICALREOCTANCECIRCUITPHASECOMPARATORVCO STOPPILOT DETFFFFFF38kHzFF38kHz 90FF19kHz 90MUTING FM AM CHANGERoRcRcRb234DECODERMUTING CONTROLFM AM CHANGE OVERV

29、cc ONMUTINGMUTINGOUTPUTSTEREOSWITCHTRIGGERLAMPDRIVERRb1011LC72131M (IC401)1202193184175166157148139121011XINCEDICLDOBO1BO2BO3BO4IO1AOUTAINPDVDDFMINAMINIO2IFINVssXOUT123456789101112242322212019181716151413A OUTPUTA INPUTA+INPUTVB OUTPUTVB INPUTB +INPUT12345786S2S3S4S5S6S7S8S9S10S1VDDSTBDATAS2S3S4S5S6

30、S7S8S9S10GNDCKVssS113141345678910111221516282726252423222120191817113282121227141516VssGNDVDDS1S10CKDATASTBGND=0VVss=-8.0-17VGND=0VVIDEO OUTVIN1A12345676dBamp8Vcc9video switch(4 inout 1 output)controldriverBGNDVIN2VIN3VIN4TC9273N-007 (IC300)NJM2068DD (IC301,602)LA7952 (IC500)(U.S.A./Canada model)Bor

31、der InputPin No SymbolNameFunctionDual Power Use:VDD = 8.017 VSingle Power Use:VDD = 8.018V+Power TerminalDigital Ground+Power TerminalI/O TerminalClock InputLow levelTerminalClock input for data transfer.Serial input for switch setting.Strobe InputStrobe input for data writing.Strobe InputData Inpu

32、tInput terminal of analog switch.TC9273N Terminal Function44DRA-295ABLCGNDVcc16 115 214 313 412 511 610 7 9 8STRDCPQP0QP1QP4QP5QP6QP7QS2QS1QP3QP2GNDOE424140393837363534333231302928272625242322 1 2 3 4 5 6 7 8 9101112131415161718192021OUT4OUT3OUT2OUT1AVDDDVDDSWOUTSROUTSLOUTCOUTROUTLOUTAVSSSWinGNDSSRi

33、nSLinGNDCCinDNDRRinGNDLLinBYPASSRBLPASSLLTRELBASS3LBASS2LBASS1CLKDATALATCHDGNDAGNDCL1CL2CR1CR2RTRERBASS3RBASS2RBASS1tonetoneOUTPUTPORTMCU I/FVCCVOUTB.P.FPDvolumevolumevolumevolumevolumevolumeM62446FP (IC601)PC74HC4094 (IC600)?ICP-N15 (IC105)? P43T7D330BW16NJL64H380A (RMC900)IC PROTECTORIR SENSOR?POS

34、ISTORDetectorFRONT VIEWFRONT VIEWVoutGNDVccFRONT VIEWCXA1511M(IC501)(U.S.A./Canada model)8 17 26 35 4INC1C2GNDNCfoOUTVCCTDA7330B (IC901)(Europe model only)1234567891020191817161514131211MUXINVREFCOMPFILOUTGNDT1T3T4OSCOUTOSCINPORTMFSELT2VCCARIQUALRDDARDCLT57NJM7805FA (IC104)NJM7812FA (IC502)(U.S.A./C

35、anada model)KIA7815AP (IC101)NJM7915FA (IC102)InputGNDOutputFRONTVIEWGNDInputOutputFRONTVIEW87564321ABLC+ INC1C2 GNDfoNCOUTVccHeadAmpLimiterAmpBPFBEFDetector &ComparatorIntegratorHysteresisComparator22kohmComparatorLimiterAmpHead Amp45DRA-2952SD947FKTA1266YKSA992FKSC1845FKTC3200BLKTC3198YKTA1268BLKS

36、A916Y2SC1740SKTC2874BKTC3880SDTA114EKDTA114YK DTC114YKTOPVIEWEBCTOPVIEWEBCFRONTVIEWBCETOP VIEWKDS160MTZJ3.3BMTZJ5.1BMTZJ5.6BMTZJ6.2BMTZJ6.8BMTZJ7.5AMTZJ7.5BMTZJ18BMTZJ20B1N40071SS133BCER1R2BCER1R22SB15592SD2389FRONTVIEWECBDTA114ESDTA144ESDTC114ESDTC114YSDTC144ESFRONTVIEWBCEDTA seriesDTC seriesDTA114

37、EKDTA114YKR110kohm R210kohm 10kohm 47kohm DTA114ES10kohm 10kohm DTA114ES47kohm47kohmDTC114YKR1R210kohm 47kohmDTC144ES47kohm 47kohmDTC114YS10kohm 47kohm DTC114ES10kohm 10kohm TOP VIEWHL-50RDRF4KBPC604? DIODES (LED Included)? TRANSISTORS46DRA-295FL DISPLAY16-st-42GNK (FL900)S38S14S9S1S2S3S4S5S12S13S7S

38、15S6S10S11G1G1G2G3G4G5G6G7G16G15G13G12G10G9F2F1158G14G11G8G2G1612345678910111213141516171819232425262728293031323334F1F1S1S2S3S4S5S6S7S8S9S10 S11 S12 S13 S14 S15 S16 S172021223536373839404142434445464748495051525354555657S18S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36S37 S

39、38G16 G15 G14 G13 G12 G11 G10G9G8G7G6G5G4G3G2G1F2F258F1,F2 : FilamentG1G16 : GridS1S38 : AnodeS13S14S15S16S17S18S19S20S21S22S23S24G1G2G3G4G5G6G7G8G9G10G11G12G13G14G15G16S38S36S37S38? 2DBSTV? 1VDPTAPE/(DVD)/(MD)AUXDVDMDV.AUXTUNER? 2? 3CD? 1PHONOVCRRECMULTISTEREOAUTOTUNEDRDSCHS1S2S3S4S5S6S7S8S9S10S11S

40、12S1S2S3S4S5S6S7S9S10S11S12S1S2S3S4S5S6S7S8S9S10S11S12S13S14S15S16S17S18S19S20S21S22S23S24S13S14S15S25S26S27S28S29S30S31S32S33S34S35S25S26S27S28S29S30S31S32S33S34S35G2G16G1G2G16G1G2G16G1G2G16G1DIGITALPRO LOGICS1S6S11S16S21S26S31S2S7S12S17S22S27S32S3S8S13S18S23S28S33S4S9S14S19S24S29S34S5S10S15S20S25S

41、30S35TUNEDRDSSTEREOAUTORECMULTIPHONOVCRCD?1TUNER?2?3V.AUXAUXMDDVD /TAPEVDPTV?1?2/DBSPRO LOGICDIGITALDIGITALANALOGTUNEDRDSSTEREOAUTORECMULTIPHONOVCRCD? 1TUNER? 2 ? 3V.AUXAUXMDDVD/TAPEVDPTV? 1? 2/ DBSCHCHPRO LOGICDIGITALDIGITALANALOGPin AssignmentAnode & Grid AssignmentPIN NO.CONNECTIONPIN NO.CONNECTI

42、ONPIN NO.CONNECTION1131111101313131387654321ABCDEDRA-29547MAIN P .W.B. UNIT AssyCOMPONENT SIDEPRINTED WIRING BOARDS17113113711012322212222311011187654321ABCDEDRA-29548VOLUME P .W.B. UNIT AssyCOMPONENT SIDE189161212242112011087654321ABCDEDRA-29549FOIL SIDE87654321ABCDEDRA-29550TUNER P .W.B. UNIT Assy

43、COMPONENT SIDE145887654321ABCDEDRA-29551FOIL SIDE52DRA-295ttttl l l l lResistorsEx.:RN14K2E182GFRType ShapePower Resist- Allowable Othersand per-anceerrorformancettttssss Resistance1 821800 ohm = 1.8 kohmIndicates number of zeros after effective number.2-digit effective number. Units: ohm1 R21.2 ohm

44、1-digit effective number.2-digit effective number, decimal point indicated by R. Units: ohml l l l lCapacitorsEx.:CE04W1H2R2MBPTypeShapeDielectric Capacity Allowable Othersand per- strengtherrorformancessssss Capacity (electrolyte only)2 222200FIndicates number of zeros after effective number.2-digi

45、t effective number. Units: F.2 R22.2F1-digit effective number.2-digit effective number, decimal point indicated by R. Units: F. Capacity (except electrolyte)2 222200pF=0.0022F(More than 2)Indicates number of zeros after effective number.2-digit effective number. Units: pF.2 21220pF(0 or 1)Indicates

46、number of zeros after effective number.2-digit effective number. Units: pF. When the dielectric strength is indicated in AC, AC is included after the dieelectricstrength value.ssNOTE FOR PARTS LISTlPart indicated with the mark ? are not always in stock and possibly to take a long period of time for

47、supplying, or insome case supplying of part may be refused.lWhen ordering of part, clearly indicate 1 and I (i) to avoid mis-supplying.lOrdering part without stating its part number can not be supplied.lPart indicated with the mark is not illustrated in the exploded view.lNot including Carbon Film 5

48、%, 1/4W Type in the P.W.Board parts list. (Refer to the Schematic Diagram for those parts.)WARNING:Parts marked with this symbol have critical characteristics.Use ONLY replacement parts recommended by the manufacturer.RD : Carbon2B : 1/8WF:1%P:Pulse-resistant typeRC : Composition2E : 1/4WG:2%NL :Low

49、 noise typeRS : Metal oxide film2H : 1/2WJ:5%NB :Non-burning typeRW : Winding3A : 1WK:10%FR :Fuse-resistorRN : Metal film3D : 2WM:20%F:Lead wire formingRK : Metal mixture3F : 3W3H : 5WCE :Aluminum foil0J : 6.3VF : 1%HS: High stability typeelectrolyticCA :Aluminum solid1A : 10VG : 2%BP : Non-polar ty

50、peelectrolyticCS :Tantalum electrolytic1C : 16VJ : 5%HR: Ripple-resistant typeCQ :Film1E : 25VK : 10%DL : For change and dischargeCK :Ceramic1V : 35VM : 20%HF : For assuring highrequencyCC :Ceramic1H : 50VZ : +80%U: UL partCP :Oil2A : 100V20%C: CSA partCM :Mica2B : 125VP : +100%W : UL-CSA typeCF :Me