Denon-AVR981-avr-sm维修电路原理图.pdf

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1、Hi-Fi ComponentSERVICE MANUALMODEL AVR-2801/981AV SURROUND RECEIVER? Some illustrations using in this service manual are slightly different from the actual set.TUNINGBANDTITLEMENU/GUIDEMODEMEMORYUSE/LEARNT.TONEMULTIOUTPUTSET UPRETURNSTATUSDISPLAYON SCREENSYSTEMSETUPSURROUNDPARAMETERCH SELECTSELECTEN

2、TERRadioFans.CN 收音机爱 好者资料库2AVR-2801/981SPECIFICATIONSAUDIO SECTION(Power Amplifier)Rated output:Front:90 W + 90 W(8 /ohms, 20 Hz 20 kHz with 0.05 % T.H.D.)135 W + 135 W(6 /ohms, 1 kHz with 0.7 % T.H.D.)Center:90 W(8 /ohms, 20 Hz 20 kHz with 0.05 % T.H.D.)135 W(6 /ohms, 1 kHz with 0.7 % T.H.D.)Surrou

3、nd:90 W + 90 W(8 /ohms, 20 Hz 20 kHz with 0.05 % T.H.D.)135 W + 135 W(6 /ohms, 1 kHz with 0.7 % T.H.D.)Dynamic power:120 W 2 ch (8 /ohms)170 W 2 ch (4 /ohms)200 W 2 ch (2 /ohms)Output terminals:Front:A or B6 16 /ohmsA + B8 16 /ohmsSurround/Center:6 16 /ohms(Analog)Input sensitivity/input impedance:2

4、00 mV/47 k/kohmsFrequency response:10 Hz 100 kHz: +0, 3 dB (DIRECT mode)S/N:102 dB (DIRECT mode)Distortion:0.008 % (20 Hz 20 kHz) (DIRECT mode)Rated output:1.2 V(Digital)D/A output:Rated output 2 V (at 0 dB playback)Total harmonic distortion - 0.008% (1 kHz, at 0 dB)S/N ratio 102 dBDynamic range - 9

5、6 dBDigital input:Format Digital audio interface(Phono equalizer (PHONO input-REC OUT)Input sensitivity:2.5 mVRIAA deviation:1 dB (20 Hz to 20 kHz)Signal-to-noise ratio:74 dB (A weighting, with 5 mV input)Rated output/Maximum output:150 mV/7 VDistortion factor:0.03% (1 kHz, 3 V)VIDEO SECTION(Standar

6、d Video Jacks)Input/output level and impedance:1 Vp-p, 75 /ohmsFrequency response:5 Hz 10 MHz +0, 3 dB(S-video jacks)Input/output level and impedance:Y (brightness) signal 1 Vp-p, 75/ohmsC (color) signal 0.286 Vp-p, 75/ohmsFrequency response:5 Hz 10 MHz +0, 3 dBTUNER SECTIONFM (Note: V at 75 /ohms,

7、0 dBf = 1 10-15 W)AMReceiving range:87.50 MHz 107.90 MHz520 kHz 1710 kHz(for North America model)(for North America model)87.50 MHz 108.00 MHz522 kHz 1611 kHz(for Europe, China, Hong Kong,(for Europe, China, Hong Kong,Taiwan R.O.C. and Multiple voltage models)Taiwan R.O.C. and Multiple voltage model

8、s)Usable sensitivity:1.0 V (11.2 dBf)18 V50 dB quieting sensitivity:MONO1.6 V (15.3 dBf)STEREO23 V (38.5 dBf)S/N ratio:MONO80 dBSTEREO75 dBTotal harmonic distortion:MONO0.15 %STEREO0.3 %GENERALPower supply:AC120 V, 60 Hz (for North America and Taiwan R.O.C. models)AC230 V, 50 Hz (Europe model)AC220

9、V, 50 Hz (for China model)AC115/230 V, 50/60 Hz (for Hong Kong and Multiple voltage)Power consumption:5.0 A (for North America model)270 W (for Europe, China, Hong Kong, Taiwan R.O.C. and Multiple voltage models)Maximum external dimensions:434 (W) 171 (H) 416 (D) mm (17-3/32 6-11/32 16-3/8)Weight:11

10、.5 kg (25 lbs. 6 oz.)REMOTE CONTROL UNIT(RC-881: for North America, China, Hong Kong, Taiwan R.O.C. and Multiple voltage models)(RC-882: for Europe model)Batteries:R6P/AA Type (two batteries)External dimensions:70 (W) 215 (H) 24 (D) mm (2-3/4 8-15/32 15/16)Weight:200 g (Approx. 7 oz.) (including bat

11、teries)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 (2) a line to chassisresistance check. If the

12、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3AVR-2801/981WIRE ARRANGEMENTIf wire bundles are untied or moved to perform adjustment or parts replacement etc.,be sure to re

13、arrange them neatly as theywere originally bundled or placed afterward.Otherwise, incorrect arrangement can be a cause of noise generation.Wire arrangement viewed from the top4AVR-2801/981DISASSEMBLY(Follow the procedure below in reverse order when reassembling)1. Top CoverRemove 3 screws on the rea

14、r and 6 screws on bothsides to detach the Top Cover as shown in the arrowdirection.2. Front Panel(1) Remove 7 screws from the top and bottom edges ofthe Front Panel.(2) Release 4 top and bottom hooks, then detach the FrontPanel as shown in the arrow direction.Top CoverFront panel1233. Inner PanelPul

15、l out the Inner Panel in the arrow direction after removing3 screws .4Inner panelHookHook12233344HookHook5AVR-2801/9814. Inner Panel Assy(1) Remove 3 round and 1 square knobs, and unscrew 4nuts.(2) Remove 19 screws fixing each P.W.B.5. Amp Unit(1) Remove 2 screw to detach Pre-out Unit .(2) Take off

16、the Amp Unit as shown in the arrow directionafter removing 1 screw .Nut56789106. Regulator UnitTake off the Regulator Unit as shown in the arrowdirection after removing 8 screws .11555Round knobSquare knobRound knob67891011Nut6AVR-2801/9817. S-Video / C-video / Audio-in & DSP /Ext-in & VR / Digital-

17、in / Tuner Unit(1) Remove 38 screws to detach the Rear Panel.(2) Take off the objective P.W.B. upward.138. How to Check Power Amp / -com Unitwith Power-on(1) Remove 12 screws , 1 screw , and 4 screws fixing to the Chassis.(2) Pull up the Unit to separate from the Chassis.1415Rear Panel13131315141212

18、1212131315+ADCDSPDACLPFRIAABUFF.A/D IN AMPD/A OUT AMPTOH.P .F.VRADDER.FROM.(S.W.ch.)EQ.AMPPRE AMPCINEMA EQTONEPOWER AMPSP-OUTSP-OUTH/P-OUTPRE-OUTPRE-OUTD/A OUT AMPVRPOWER AMPSP-OUTSP-OUTPRE-OUTPHONO-INLINE-INEXT.-INEXT.-IN10kHz: 4dB+LPFPRE AMPCINEMA EQCENTER CH ONLY10kHz: 4dB(dBV)(dB)302010010403020

19、100dB30142050EXT.IN 200mVD/A OUT(DOLBYDIGITAL: DIALNORM27dB)D/A OUT(DOLBYDIGITAL: DIALNORM27dB)200mV/EXT.INLINE-IN 200mVPHONO 2.5mV (52dBV)9dBA/D IN0dBfs10dBfs20dBfs30dBfsA/D0dBfs10dBfs20dBfs30dBfsD/A15.5dB16.5dB(TONE)1.2V (1.58dBV) (DIRECT)42.6dB27V, 28.6dBV38dBFROMDSP(dBV)(dB)302010010403020100dB1

20、4200dBfs10dBfs20dBfs30dBfsD/A1.2V (1.58dBV) 15.5dBLEVEL: Same as Front chPRE-OUT+DAC+LEVEL DIAGRAM7DCBA876E14325AVR-2801/981FRONTCENTERSURROUND887651432BCDAEAVR-2801/981SUBWOOFER+(FRONT CH)FRONT L/R ADD.LPFD/A OUT AMPADDERINV(FRONT CH)TOATTN.PRE AMPPRE-OUTEXT.-INPRE-OUT0dBfs10dBfs20dBfs30dBfs40dBfsD

21、/A1.2V (1.58dBV) 2.15V (6.65dBV) 20.5dB2.5dB1.5dB1.5dB11dB11dB3dBTO FRONT CH20.5dB(dBV)302010010100dB1420(dB)403020200mV/EXT.INFROMR chFROML ch+DAC+D/A OUT(DOLBYDIGITAL: DIALNORM27dB)Config2Config1CH1: DATACH2: fsCH3: 64fsCH4: 256fsCLOCK FLOW & WAVE FORM IN DIGITAL BLOCKWave FormCH1: D-DATA(IC705 (5

22、) )CH1: DATACH2: fsCH3: 64fs129AVR-2801/9814CH1: DATACH2: fsCH3: 64fs3A/D SELECTORIC804SN74AHC157PW*fs is a sampling frequency of input digital signal. e.g.:sampling frequency 48kHz fs=48kHz*64fs and 256fs are 64 or 256 times the samplingfrequency respectively. e.g.: sampling frequency 48kHz 64fs: 4

23、8kHzX64=3.072MHz 256fs: 48kHzX256=12.288MHz*The samoling frequency for analog input is fixedto 48kHz internally.*(No.) indicates the pin unmber of individual *The arrow indicates the direction of signal as the input terminal pointed by the arrow and the output terminal by the opposite.D/A CONVERTERI

24、C701AD1854(2)256fs(26)64fsFch(25)fs(27)DATAIC702AD1854(2)256fs(26)64fsC&SWch(25)fs(27)DATAIC703AD1854(2)256fs(26)64fsSch(25)fs(27)DATAINPUTSELECTOR1IC705TC74HC151AFCOAX1(13)OPT1(15)(5)OPT2(3)OPT3(2)IC800LC89055WCKOUT(13)(5)DIN2BCK(14)LRCK(15)DATAD(16)XIN(22)12.287MHzIC802SG-8002(3)A/D CONVERTERIC604

25、AK5353MCLK(11)AINSCLK(12)LRCK(10)SDATA(9)MCLK(44)(22)(25)(26)SCLKN1LRCKN1SDATAN1AUDATA0(41)AUDATA1(40)AUDATA2(39)(30)CLKINIC814CS492604DSP1213(27)(43)(42)SCLKLRCLKCMPDAT9624 SELECTORIC805TC74HCT157AF4MCLKDA SCKDA LRCKSD IN256fs64fsfsFRONTCENTER/SWSURROUND256fs64fsfsDATAIC606(7)(13)(10)SN74LV4040APWD

26、IR12345678ABCDE10AVR-2801/981ADJUSTMENTADJUSTMENTTuner SectionTuner SectionCONNECTION DIAGRAM OF MEASURING INSTRUMENTSCONNECTION DIAGRAM OF MEASURING INSTRUMENTS? FM FM? AM AM1111AVR-2801/981AVR-2801/981T50 3I C50 2112Pi nG NDA MA M I FO U TO S CI LLO S CO PE1U -3235-5 TU NER U NI TS TEREOM O DU LA

27、TO RFM S S GDI G I TA LVO LTM ETERTP10 2T50 2VR50 1VR50 2I C50 27511U -3235-5 TU NER U NI TFM/MPX ALIGNMENTInputOutputAdjustStepAlignmentItemTuningFrequencySettingTypeFrequencyInput LevelModulationCouplingTypeConnect toPointsAdjust toRemarks1Tuning Center98.1 MHzFM SSG98.1 MHz60 dBNoneAntennaTermina

28、lDigitalVoltmeterTP102T502 50mVFunction : FMMode : Auto2Separation98.1 MHzFM SSG98.1 MHz60 dBStereo (L)1KHz 100%AntennaTerminalACVoltmeterAUDIOOUTTerminal (R)VR502MaximumSeparation3Signal Level98.1 MHzFM SSG98.1 MHz20 dBOffAntennaTerminalVR501Light“TUNED”FLDCharacterAM ALIGNMENTOutputAdjustmentStepA

29、lignmentItemFrequencyInputTypeConnect toPointsAdjust toRemarks1IFIF SWEEP(Input level is not over to work A.G.C.)OscilloscopeIC502 12PinT503Maximum height and bestsymmetry curve1kHz1kHzAudio SectionIdling Current (1U-3232-1)Required measurement equipment : DC VoltmeterPreparation(1)Avoid direct blow

30、 from an air conditioner or an electric fan, and adjust the unit at normal room tempereture 15 C 30 C(59 F 86 F).(2)PresettinglPOWER (Power sourse switch)OFFlSPEAKER (Speaker terminal)No load (Do not connect speaker, dummy resistor, etc.)Adjustment(1)Remove top cover and set VR501, VR502, VR503, VR5

31、04, VR505, on 1U-3232-1 (Power Unit) at counterclockwise ( ) fully.(2)Connect DC Voltmeter to test points (FRONT-Lch: TP501, FRONT-Rch: TP502, CENTER ch: TP505, SURROUND-Lch:TP503, SURROUND-Rch: TP504).(3)Connect power cord to AC Line, and turn power switch ON.(4)Presetting.MASTER VOLUME : - counter

32、clockwise ( min.)MODE: 5CH STEREOFUNCTION: CD(5)Allow 2 minutes, and turn VR501 clockwise ( ) and adjust the TEST POINT voltage to 1.5 mV 0.5 mV DC.(6)After 10 minutes from preset, turn VR501 to set the voltage to 3 mV 0.5 mV DC.(7)Adjust the Variable Resistors of other channels in the same way.(8)A

33、fter 5 minutes from (6), turn VR501 to set the voltage to 3 mV 0.5 mV DC.(9)Adjust the Variable Resistors of other channels in the same way.12AVR-2801/981VR504TP504VR502TP502VR505TP505VR501TP501VR503TP503S RchF RchCchF LchS LchDC VoltmeterNameNameFunctionFunctionTMP88CU74F Terminal FunctionTMP88CU74

34、F Terminal FunctionPinPinNo.No.1 1P02/S01P02/S01RDS RESETRDS RESETO OC CZ ZL LRDS reset output (LC7074)RDS reset output (LC7074)2 2P03P03OSD RSTOSD RSTO OC CZ ZH HOSD control output (M35015)OSD control output (M35015)3 3P04P04ST/MONOST/MONOO OC CZ ZL LSTEREO/MONO control signal, L: STEREOSTEREO/MONO

35、 control signal, L: STEREO4 4P05P05PLFL DATAPLFL DATAO OC CZ ZL LPLL, FL control terminal (LC72131 & LC75721NE)PLL, FL control terminal (LC72131 & LC75721NE)5 5P06P06PLL STBPLL STBO OC CZ ZL LPLL control terminal (LC72131)PLL control terminal (LC72131)6 6P07P07PLFL CLKPLFL CLKO OC CZ ZL LPLL, FL con

36、trol terminal (LC72131 & LC75721NE)PLL, FL control terminal (LC72131 & LC75721NE)7 7VssVssVssVssI IGNDGNDL LGNDGND8 8XoutXoutXoutXoutO OXTALXTAL9 9XinXinXinXinI IXTALXTAL1010RESET_RESET_RESET_RESET_I IEuEuLvLvL LReset inputReset input1111P22/XTOUTP22/XTOUT TUNED_TUNED_I IEuEuLvLvZ ZTuning detect, L:

37、 TunedTuning detect, L: Tuned1212P21/XTINP21/XTINSTEREO_STEREO_I IEuEuLvLvZ ZL: At stereo receiveL: At stereo receive1313TESTTESTTESTTESTI IGNDGNDS SConnect to GNDConnect to GND1414P20/INT5_P20/INT5_B.DOWN_B.DOWN_I IEuEuLvLvZ ZPower down detect, L: Power downPower down detect, L: Power down1515P10/I

38、NT0_P10/INT0_PROTECT_PROTECT_I IEdEdE&LE&LZ ZPROTECTION detect input, H: DetectPROTECTION detect input, H: Detect1616P11/INT1P11/INT1RDS STARTRDS STARTI IZ ZL LRDS data input (LC7074)RDS data input (LC7074)1717P12P12OSD CLKOSD CLKO OC CZ ZH HOSD control output (M35015)OSD control output (M35015)1818

39、P13P13OSD CSOSD CSO OC CZ ZH HOSD control output (M35015)OSD control output (M35015)1919P14P14OSD DATAOSD DATAO OC CZ ZL LOSD control output (M35015)OSD control output (M35015)2020P15/INT3P15/INT3REMOCONREMOCONI IEdEdE&LE&LZ ZRemote control signal inputRemote control signal input2121P16/INT2P16/INT2

40、ACKACKO OC CZ ZL LMAIN-SUB CPU comm. control terminalMAIN-SUB CPU comm. control terminal2222P17/INT4P17/INT4REQREQI IEuEuZ ZL LMAIN-SUB CPU comm. control terminalMAIN-SUB CPU comm. control terminal2323P30/SCLP30/SCLSISII IMAIN-SUB CPU comm. control terminalMAIN-SUB CPU comm. control terminal2424P31/

41、SDAP31/SDASOSOO OC CMAIN-SUB CPU comm. control terminalMAIN-SUB CPU comm. control terminal2525P32/SCK0_P32/SCK0_ CLKCLKO OC CMAIN-SUB CPU comm. control terminalMAIN-SUB CPU comm. control terminal2626P40/AIN0P40/AIN0MODEMODEI IEuEuLvLvZ ZDestination switching inputDestination switching input2727P41/A

42、IN1P41/AIN1KEY1KEY1I IEuEuLvLvZ ZButton input 1Button input 12828P42/AIN2P42/AIN2KEY2KEY2I IEuEuLvLvZ ZButton input 2Button input 22929P43/AIN3P43/AIN3KEY3KEY3I IEuEuLvLvZ ZButton input 3Button input 33030P44/AIN4P44/AIN4FUNC STB1FUNC STB1O OC CZ ZFunction control output (TC9274N), INPUTFunction con

43、trol output (TC9274N), INPUT3131P45/AIN5P45/AIN5FUNC/T. CON CLKFUNC/T. CON CLKO OC CZ ZL LFunction control output (TC9274N, TC9273), TONE control output (TC9184P)Function control output (TC9274N, TC9273), TONE control output (TC9184P)3232P46/AIN6P46/AIN6FUNC/T. CON DATAFUNC/T. CON DATAO OC CZ ZL LFu

44、nction control output (TC9274N, TC9273), TONE control output (TC9184P)Function control output (TC9274N, TC9273), TONE control output (TC9184P)3333P47/AIN7P47/AIN7FUNC STB2FUNC STB2O OC CZ ZL LFunction control output (NJU7313), 6CH EXT. INFunction control output (NJU7313), 6CH EXT. IN3434P50/AIN8P50/

45、AIN8E.VOL STBE.VOL STBO OC CL LL LElect. volume control output (TC9459)Elect. volume control output (TC9459)3535P51/AIN9P51/AIN9TONE STBTONE STBO OC CL LL LTONE control output (TC9184P)TONE control output (TC9184P)3636P52/AIN10P52/AIN10E.VOL DATAE.VOL DATAO OC CL LH HElect. volume control output (TC

46、9459)Elect. volume control output (TC9459)3737P53/AIN11P53/AIN11E.VOL CLKE.VOL CLKO OC CL LH HElect. volume control output (TC9459)Elect. volume control output (TC9459)SymbolSymbolI/OI/OTypeTypeOpOpDetDetResResInitInitSEMICONDUCTORSSEMICONDUCTORS? ?ICsICsNote:Note: Abbreviation ahead of IC No. indic

47、ates the name of P.W.B.Abbreviation ahead of IC No. indicates the name of P.W.B.PO:PO: Power P.W.B.Power P.W.B.RE:RE: Requlator P.W.B.Requlator P.W.B.EX:EX: Exit in P.W.B.Exit in P.W.B.AU:AU: Audio/DSP P.W.B.Audio/DSP P.W.B.CO:CO: Control P.W.B.Control P.W.B.TMP88CU74FTMP88CU74F(CO: IC303)(CO: IC303

48、)FunctionFunction3838VASSVASSVASSVASSI IRef. volt (GND)Ref. volt (GND)3939VAREFVAREFVAREFVAREFI IRef. volt (VDD)Ref. volt (VDD)4040VDDVDDVDDVDDI IPower supplyPower supply4141P60P60FL CEFL CEO OP PEdEdS SL LH HFL display control output (LC75712NE)FL display control output (LC75712NE)4242P61P61FL RESF

49、L RESO OP PEdEdS SL LH HFL display control output (LC75712NE)FL display control output (LC75712NE)4343P62P62FUNC STB3FUNC STB3O OP PEdEdZ ZL LFunction control output (TC9273), REC OUTFunction control output (TC9273), REC OUT4444P63P63FA-RELAYFA-RELAYO OP PIdIdL LL LFront SP relay A control terminal,

50、 L: MuteFront SP relay A control terminal, L: Mute4545P64P64FB-RELAYFB-RELAYO OP PIdIdL LL LFront SP relay B control terminal, L: MuteFront SP relay B control terminal, L: Mute4646P65P65C-RELAYC-RELAYO OP PIdIdL LL LCenter SP relay control terminal, L: MuteCenter SP relay control terminal, L: Mute47