Integra-DTR7_4-avr-sm 维修电路原理图.pdf

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1、DTR-7.4SERVICE MANUALSERVICE MANUALAV RECEIVERBlack modelMODEL DTR-7.4Ref. No. 3787Nov., 2003BMDD120V, AC 60HzBMPA230240V, AC 50HzMaster VolumeStandby/OnUpsamplingPure AudioAudioSelectorTapeTunerPhonoNet AudioCDVideo 1VCR 1Video 3Video 2VCR 2Video 4Video 5DVDZone 2 ()GRNRec ()REDA-FO RM Listening Mo

2、de MemoryVideo 5 InputStereoDirect / Pure AudioDSPSurroundTHXClearRec OutZone 2Of fSetupTuningPresetEnterReturnDimmerDisplayS VideoAudioVideoLRPhonesStandbyMemoryFM ModeDTR-7.4Digital SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK ON THESCHEMATIC DIAGRAM AND IN THE PARTS LIST ARECRIT

3、ICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.REPLACE THESE COMPONENTS WITH ONKYOPARTS WHOSE PART NUMBERS APPEAR AS SHOWNIN THIS MANUAL.MAKE LEAKAGE-CURRENT OR RESISTANCEMEASUREMENTS TO DETERMINE THAT EXPOSEDPARTS ARE ACCEPTABLY INSULATED FROM THESUPPLY CIRCUIT BEFORE RETURNING THEAPPLIANCE TO THE CUSTOM

4、ER.RadioFans.CN 收音机爱 好者资料库DTR-7.4SPECIFICATIONSAMPLIFIER SECTIONTUNER SECTIONFMAMGENERALSpecifications and features are subject to change without notice.Power output (USA model) (FTC):All channels:100 W per channel min. RMS into 8 , 2 channels driven from 20 Hz to 20 kHz with no more than 0.08% tota

5、l harmonic dis-tortion.130 W min. RMS into 6 , 2 channels driven, 1 kHz with no more than 0.1% total harmonic distortion.Continuous power output(Australian model) (DIN):135 W at 6 Dynamic power output (stereo):2 250 W at 3 2 210 W at 4 2 130 W at 8 Total Harmonic Distortion:0.08% at rated power0.08%

6、 at 1 W outputIM Distortion:0.08% at rated power0.08% at 1 W outputDamping factor:60 at 8 Input sensitivity and impedancePHONO:2.5 mV, 50 k LINE (CD, TAPE, DVD, VIDEO 1-5):200 mV, 50 k MULTICHANNEL INPUT(FRONT L/C/R, SUR-ROUND L/R, SURROUND BACK L/R):200 mV, 50 k (SUBWOOFER):36 mV, 50 k COAXIAL 1, 2

7、, 3 (DIGI-TAL):0.5 Vp-p, 75 DVD, VIDEO 1, 2, 3, 4, 5:1 Vp-p, 75 (Composite Video)1 Vp-p, 75 (S-Video, Y signal)0.28 Vp-p, 75 (S-Video, C sig-nal)COMPONENT VIDEO 1, 2: 1 Vp-p, 75 (Y)0.7 Vp-p, 75 (PB/CB, PR/CR)Output level and impedanceRec out (TAPE, VIDEO 1,2): 200 mV, 470 Pre out: 1 V, 470 ZONE 2 OU

8、T:100 mV, 470 VIDEO (VIDEO 1, 2, MONI-TOR OUT, ZONE 2 OUT):1 Vp-p, 75 (Composite Video)S-VIDEO (VIDEO 1, 2, MONITOR OUT):1 Vp-p, 75 (S-Video, Y signal)0.28 Vp-p, 75 (S-Video, C sig-nal)COMPONENT VIDEO OUT: 1 Vp-p, 75 (Y)0.7 Vp-p, 75 (PB/CB, PR/CR)Phono overload:120 mV RMS at 1 kHz, 0.5% T.H.D.Freque

9、ncy response:5 Hz to 100 kHz: +1-3 dB (CD in Direct mode)RIAA deviation:20 Hz to 20 kHz: 0.8 dBTone ControlBass:10 dB at 50 HzTreble:10 dB at 20,000 HzSignal-to-noise ratio (direct)PHONO:Line:80 dB (IHF A, 5 mV input)110 dB (IHF A, 0.5 V input)Ethernet port:10BASE-TSupported audio file format:MP3, W

10、MA, WAV (non-compres-sion, sampling rates of 32 kHz, 44.1 kHz, and 48 kHz supported)Tuning rangeUSA & Canadian models:87.50108.00 MHz (100 kHz steps)Australian models:87.50108.00 MHz (50 kHz steps)Usable sensitivityMono: 11.2 dBf, 1.0 V (75 , IHF)0.9 V (75 , DIN)Stereo: 17.2 dBf, 2.0 V (75 , IHF)23

11、V (75 DIN)50 dB quieting sensitivityMono: 17.2 dBf, 2.0 V (75 )Stereo: 37.2 dBf, 20.0 V (75 )Capture ratio: 2.0 dBImage rejection ratioUSA & Canadian models:40 dBAustralian models:85 dBIF rejection ratio: 90 dBSignal-to-noise ratioMono: dBStereo: dBAlternate channel attenuation: Mono 55 dBSelectivit

12、y: dB (DIN)AM suppression ratio: 50 dBTotal harmonic distortionMono: 0.2%Stereo: 0.3%Frequency response: 30 Hz15 kHz, 1.0 dBStereo separation: 45 dB at 1 kHz30 dB at 100 Hz10 kHzTuning rangeUSA & Canadian models: 5301,710 kHz (10 kHz steps)Australian models:5221,611 kHz (9 kHz steps)Usable sensitivi

13、ty: 30 VImage rejection ratio: 40 dBIF rejection ratio: 40 dBSignal-to-noise ratio: 40 dBTotal harmonic distortion: 0.7%Power supplyUSA & Canadian models:AC 120 V, 60 HzAustralian models:AC 230-240 V, 50 HzPower consumptionUSA & Canadian models:8.1 AAustralian models:655 WDimensions (W H D): 435 175

14、 460 mm 17-1/8 6-7/8 18-1/8Weight:17.4 kg (38.4 lbs) 767050RadioFans.CN 收音机爱 好者资料库DTR-7.4SERVICE PROCEDURES1. Replacing the fuses This symbol located near the fuses indicates that the fuse used is fast operating type. For continued protection against fire hazard, replace with same type fuse. For fus

15、e rating refer to the marking adjacent to the symbol. Ce symbole indique que le fusible utlise est a rapide. Pour une protection permanente, nuntiliser que fusibles de meme type. Ce darnier est la qu le present symbol est appse.2. To initialize the unitThis device employs a microprocessor to perform

16、 variousfunctions and operations. If interference generated by an external power supply, radio wave, or other electrical source results in accident which causes the specified operations and functions to operate abnormally.To perform a result, please follow the procedure below.1.Press the STANDBY ON

17、button to turn on the unit.2.Press and hold down the VIDEO 1 button, then press the STANDBY/ON button.3.After CLEAR is displayed, the preset memory and each mode stored in the memory, such as surround, are initialized and will return to the factory setting.4.Unplug the power supply cord.4. Memory Pr

18、eservationThis unit does not require memory preservation batteries. Abuilt-in memory power back-up system preserves the contentsof the memory during power failures and even when the unit isunplugged. The unit must be plugged in order to charge theback-up system.The memory preservation period after t

19、he unit has beenunplugged varies depending on climate and placement of theunit. On the average, memory contents are protected over aperiod of a few weeks after the last time the unit has beenunplugged. This period is shorter when the unit is exposed to ahighly humid climate.Note: : 120V model only:

20、Australian model only3. Safety-check out(U.S.A. model only)After correcting the original service problem, perform thefollowing safety check before releasing the set to the customer.Leakage Current CheckMeasure leakage current to a known earth ground(water pipe,conduit, etc.) by connecting a leakage

21、current tester between the earth ground and exposed metal parts of the appliance(input/output terminals, screwheads,metal overlays, etc.).Plug the power supply cord directly into a 120V AC 60 Hz outletand turn Standby switch on. Any current meausred must not exceed 0.5mA. CIRCUIT NO.PART NO.DESCRIPT

22、IONF901 25219910A-UL,Fuse F902 252077,4A-SE-EAK,252243 or4A-SE-TL250V or2522774A-SE-TL250V F903 252164 or5A-UL/T-237 or2522585A-T/UL-ST2,Fuse 252075,2.5A-SE-EAK,252241 or2.5A-SE-TL250V or2522752.5A-SE-TL250V,Fuse F9501,F9502 252160 or2.5A-UL/T-237 or2522542.5A-T/UL-ST2,Fuse 252075,2.5A-SE-EAK,252241

23、 or2.5A-SE-TL250V or2522752.5A-SE-TL250V,Fuse F9503,F9504 252158 or1.6A-UL/T-237 or2522521.6A-T/UL-ST2,Fuse 252073,1.6A-SE-EAK,252239 or1.6A-SE-TL250V or2522731.6A-SE-TL250V,Fuse DTR-7.4PANEL VIEWSFRONT PANELProtective capsProtective caps are provided for the Video 5 jacks. Be sure to always attach

24、the protective caps when you are not connecting a device to the Video 5 jacks.Master VolumeStandby/OnUpsamplingPure AudioAudioSelectorTapeTunerPhonoNet AudioCDVideo 1VCR 1Video 3Video 2VCR 2Video 4Video 5DVDZone 2 ()GRNRec ()REDA-FO RM Listening Mode MemoryVideo 5 InputStereoDirect / Pure AudioDSPSu

25、rroundTHXClearRec OutZone 2Of fSetupTuningPresetEnterReturnDimmerDisplayS VideoAudioVideoLRPhonesStandbyMemoryFM ModeDTR-7.4Digital Video 5 InputS VideoAudioVideoLRDTR-7.4Digital Protective capsDTR-7.4PANEL VIEWSFRONT PANEL Standby/On button This button is used to set the DTR-7.4 to On or Standby. I

26、n the standby state, the display is turned offand the DTR-7.4 cannot be operated.Standby indicator Lights when the DTR-7.4 is in the standby state and when a signal is received from the remote control-ler. Audio Selector button Press to select the type of audio input signal. Direct/Pure Audio button

27、 Press to switch between the direct and pure audio listening modes. Remote control sensor Display button Press to display information about the current input source signal. Each time you press the Display but-ton, the screen changes to show you different infor-mation concerning the input signal. Dim

28、mer buttonPress to set the brightness of the front display. There are three settings available: normal, dark, and very dark.The brightness of the front display can also be changed using the remote controller. Stereo button Selects for the stereo listening mode. Surround buttonSelects for the Dolby P

29、ro Logic II, DTS Neo:6, Dolby Digital, or DTS listening modes. THX button Selects for the THX listening mode. DSP / buttons Switches to the DSP (Digital Signal Processing) modes.Front display Memory button Press to assign the radio station to which you are currently tuned to a preset channel or pres

30、s to delete a previously preset station. FM Mode button Press to change the stereo mode from AUTO to MONO and vice versa. Each time this button is pressed, the AUTO indication turns on and off indicat-ing the current mode. If you are listening to an FM radio station in stereo and the sound cuts out

31、or there is a great deal of noise, switch from AUTO to MONO. Tuning / buttonsThese buttons used to tune into radio stations and to select items on the onscreen setup menus (OSD).Preset / buttons These buttons are used to select radio presets and to select items on the onscreen setup menus (OSD). Rec

32、 Out button This button is used to select the input source that you want to record via the REC OUTs (i.e., TAPE OUT, VIDEO 1 OUT , VIEDO 2 OUT).Zone 2 button This button is used to select the input source for Zone 2.Off button This button is used to turn off the REC OUTs (i.e., TAPE OUT , VIDEO 1 OU

33、T , VIDEO 2 OUT) or Zone 2. Setup button Press to enter the Setup Menu. The OSD Menu will appear on the TV monitor as well as the front dis-play on the DTR-7.4. Enter button Press to display the screen for the item that is selected in the Setup Menu. Return button In the Setup Menu, press to go back

34、 one level. If pressed while at the Main Menu, you will exit the Setup Menu. Master Volume dial Use to control the volume in the main zone. The vol-ume for the remote zone (Zone 2) is independent. Video 5 Input terminals For connecting a video camera or game device. Input source buttons and indicato

35、rs (DVD, Video 15, Tape, Tuner, Phono, CD, and Net Audio) Press these buttons to select the input source for the main zone. To select the input source for the remote zone (Zone 2) or recording out (REC OUT), first press the Zone 2 or Rec Out button, and then press the desired input source button. Th

36、e input channel with its indi-cator lit red is output to REC OUT and the one with its indicator lit green is output to ZONE 2. Upsampling indicator Lights during upsampling. This function is available when the input source is Analog/PCM and the lis-tening mode is set to the stereo or surround mode.

37、Phones jack This is a standard stereo jack for connecting stereo headphones. Pure Audio indicator Lights during pure audio playback.DTR-7.4PANEL VIEWSFRONT PANELREAR PANELAInput signal path indicatorsShows from which terminal the input signal is com-ing.BListening mode or digital input format indica

38、torsOne of these indicators lights to show the format of the current input source. In addition, one of the lis-tening mode indicators lights to indicate the current listening mode.CTuning indicatorsAUTO indicatorLights when receiving FM broadcasts in the stereo mode. Turns of f when placed into the

39、monaural mode.TUNED indicatorLights when a radio station is being received.FM STEREO indicatorLights when an FM broadcast station is being received in stereo. Turns off when placed into the monaural mode.DMulti function displayDuring normal operation, shows the current input source and volume. When

40、the FM or AM input is selected, shows the frequency and preset number. When the Display button is pressed, shows the lis-tening mode and input source format. However, does not show the source format when the FM or AM source is selected.EVolume displayShows the volume level.FSLEEP indicatorLights whe

41、n the sleep timer is turned on.FM75OUTOUTOUTOUTLPHONOPRE OUTFRONTSUBSURRRLAUDIORLCDTAPERLAUDIOVIDEO S VIDEOMONITOROUTRLINININININININZONE 2DVDVIDEO 1VIDEO 2VIDEO 3VIDEO 4AUDIOAUDIOVIDEO S VIDEOGNDSURR BACK/ ZONE 2RLINAC INLETRCENTERETHERNET(Net -Tune)RLMULTI CHINPUTFRONTSUBSURRSURRBACKCENTERRLANTENN

42、AYPBPROUTPUTINPUT 1YPBPRINPUT 2YPBPRSURRBACK/ ZONE 2SPEAKERSFRONT SPEAKERSLRLRSURR SPEAKERSCENTERSPEAKERRLAC OUTLETSAC 120 V 60 HzSWITCHEDTOTAL 120W 1A MAX.INZONE 2REMOTECONTROLABOUT 12 VTRIGGER OUTDIGITALINOPT212313COAXOPT12DIGITALOUTAV RECEIVERMODEL NO. DTR-7.4RATING: AC 120 V 60 Hz 8.1 ACOMPONENT

43、VIDEOI RRS232AMDTR-7.4PANEL VIEWSREAR PANEL DIGITAL IN/OUT These jacks are for connecting components with digital input and output capabilities. PRE OUT To use the DTR-7.4 as a preamplifier, connect a power amplifier to this jack. ANTENNA These jacks are for connecting the FM indoor antenna and the

44、AM loop antenna that are supplied with the DTR-7.4. ZONE 2 OUT This jack is for connecting the component that will be used in the remote zone (Zone 2). MONITOR OUT VIDEO/S VIDEO These jacks are for connecting to the video input jacks on television monitors or projectors. COMPONENT VIDEO OUTPUT These

45、 jacks are for connecting to the component video input jacks on television monitors or projectors. ETHERNET (Net-Tune)This connector is for connecting to an Ethernet network. SPEAKERS These terminals are for connecting the speakers. AC OUTLETS This AC outlet is provided to plug in the power cord fro

46、m another component. The shape and number of the AC outlet depend on the shipping destination. MULTI CH INPUT This connector is for connecting components with a multichannel output. PHONO/CD/TAPE AUDIO IN/OUT These connectors are for connecting to the audio input and output jacks on audio components

47、. DVD/VIDEO1-4 IN/OUT These connectors are for connecting to the video input and output jacks on video components. COMPONENT VIDEO INPUT1/2 These connectors are for connecting to the compo-nent video outputs of video components that have them. RS 232This port is for connecting the DTR-7.4 to home au

48、tomation and external controllers. IR IN/OUTThese connectors are for connecting the remote sen-sor of a multi-room kit (sold separately). 12V TRIGGER OUT ZONE 2 A/BThese connectors are used to connect to the 12V TRIGGER IN terminal of a component. This jack is for connecting other Integra/Onkyo comp

49、onents equipped with the same terminal. The audio connection cables must also be con-nected. AC INLET This connector is for connecting the supplied power cord.DTR-7.4PANEL VIEWSREMOTE CONTROLLERThe DTR-7.4 s remote controller is a multipurpose device that can be used to control not just the DTR-7.4

50、but your other AV components as well. This section explains how its various operating modes can be used to control the DTR-7.4. When you use the Net-Tune mode, see Enjoy net audio for details. See Operating OnkyoProducts for information on using the remote controller to yo components and TVs, VCRs,