Onkyo-DTR7_4-avr-sm 电路图 维修手册.pdf

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1、DTR-7.4 SERVICE MANUALSERVICE MANUAL AV RECEIVER Black model MODEL DTR-7.4 Ref. No. 3787 Nov., 2003 BMDD120V, AC 60Hz BMPA230240V, AC 50Hz Master VolumeStandby/On UpsamplingPure Audio Audio Selector TapeTunerPhonoNet AudioCDVideo 1 VCR 1 Video 3Video 2 VCR 2 Video 4Video 5DVD Zone 2 ()GRN Rec ( )RED

2、 A-FO RM Listening Mode Memory Video 5 Input StereoDirect / Pure AudioDSPSurroundTHX Clear Rec OutZone 2Of f Setup Tuning Preset Enter Return DimmerDisplay S VideoAudioVideoLR Phones Standby MemoryFM Mode DTR-7.4 Digital SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATI

3、C DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRC

4、UIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. RadioFans.CN 收音机爱 好者资料库 DTR-7.4 SPECIFICATIONS AMPLIFIER SECTIONTUNER SECTION FM AM GENERAL Specifications and features are subject to change without notice. Power output (USA model) (FTC): All channels:100 W per channel min. RMS into 8 , 2 channel

5、s driven from 20 Hz to 20 kHz with no more than 0.08% total 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

6、130 W at 8 Total Harmonic Distortion:0.08% at rated power 0.08% at 1 W output IM Distortion:0.08% at rated power 0.08% at 1 W output Damping factor:60 at 8 Input sensitivity and impedance PHONO: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,

7、 SURROUND BACK L/R):200 mV, 50 k (SUBWOOFER):36 mV, 50 k COAXIAL 1, 2, 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

8、 impedance Rec out (TAPE, VIDEO 1,2): 200 mV, 470 Pre out: 1 V, 470 ZONE 2 OUT: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 (

9、Y) 0.7 Vp-p, 75 (PB/CB, PR/CR) Phono overload:120 mV RMS at 1 kHz, 0.5% T.H.D. Frequency response:5 Hz to 100 kHz: +1-3 dB (CD in Direct mode) RIAA deviation:20 Hz to 20 kHz: 0.8 dB Tone Control Bass:10 dB at 50 Hz Treble:10 dB at 20,000 Hz Signal-to-noise ratio (direct) PHONO: Line: 80 dB (IHF A, 5

10、 mV input) 110 dB (IHF A, 0.5 V input) Ethernet port:10BASE-T Supported audio file format:MP3, WMA, WAV (non-compres- sion, sampling rates of 32 kHz, 44.1 kHz, and 48 kHz supported) Tuning range USA & Canadian models:87.50108.00 MHz (100 kHz steps) Australian models:87.50108.00 MHz (50 kHz steps) Us

11、able sensitivity Mono: 11.2 dBf, 1.0 V (75 , IHF) 0.9 V (75 , DIN) Stereo: 17.2 dBf, 2.0 V (75 , IHF) 23 V (75 DIN) 50 dB quieting sensitivity Mono: 17.2 dBf, 2.0 V (75 ) Stereo: 37.2 dBf, 20.0 V (75 ) Capture ratio: 2.0 dB Image rejection ratio USA & Canadian models:40 dB Australian models:85 dB IF

12、 rejection ratio: 90 dB Signal-to-noise ratio Mono: dB Stereo: dB Alternate channel attenuation: Mono 55 dB Selectivity: dB (DIN) AM suppression ratio: 50 dB Total harmonic distortion Mono: 0.2% Stereo: 0.3% Frequency response: 30 Hz15 kHz, 1.0 dB Stereo separation: 45 dB at 1 kHz 30 dB at 100 Hz10

13、kHz Tuning range USA & Canadian models: 5301,710 kHz (10 kHz steps) Australian models:5221,611 kHz (9 kHz steps) Usable sensitivity: 30 V Image rejection ratio: 40 dB IF rejection ratio: 40 dB Signal-to-noise ratio: 40 dB Total harmonic distortion: 0.7% Power supply USA & Canadian models:AC 120 V, 6

14、0 Hz Australian models:AC 230-240 V, 50 Hz Power consumption USA & Canadian models:8.1 A Australian models:655 W Dimensions (W H D): 435 175 460 mm 17-1/8 6-7/8 18-1/8 Weight:17.4 kg (38.4 lbs) 76 70 50 RadioFans.CN 收音机爱 好者资料库 DTR-7.4 SERVICE PROCEDURES 1. Replacing the fuses This symbol located nea

15、r the fuses indicates that the fuse used is fast operating type. For continued protection against fire hazard, replace with same type fuse. For fuse rating refer to the marking adjacent to the symbol. Ce symbole indique que le fusible utlise est a rapide. Pour une protection permanente, nuntiliser q

16、ue fusibles de meme type. Ce darnier est la qu le present symbol est appse. 2. To initialize the unit This device employs a microprocessor to perform various functions and operations. If interference generated by an external power supply, radio wave, or other electrical source results in accident wh

17、ich causes the specified operations and functions to operate abnormally. To perform a result, please follow the procedure below. 1.Press the STANDBY ON 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 memor

18、y 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 Preservation This unit does not require memory preservation batteries. A built-in memory power back-up system preserves the contents of the memory

19、 during power failures and even when the unit is unplugged. The unit must be plugged in order to charge the back-up system. The memory preservation period after the unit has been unplugged varies depending on climate and placement of the unit. On the average, memory contents are protected over a per

20、iod of a few weeks after the last time the unit has been unplugged. This period is shorter when the unit is exposed to a highly humid climate. Note: : 120V model only : Australian model only 3. Safety-check out (U.S.A. model only) After correcting the original service problem, perform the following

21、safety check before releasing the set to the customer. Leakage Current Check Measure leakage current to a known earth ground(water pipe, conduit, etc.) by connecting a leakage current tester between the earth ground and exposed metal parts of the appliance (input/output terminals, screwheads,metal o

22、verlays, etc.). Plug the power supply cord directly into a 120V AC 60 Hz outlet and turn Standby switch on. Any current meausred must not exceed 0.5mA. CIRCUIT NO.PART NO.DESCRIPTION F901 25219910A-UL,Fuse F902 252077,4A-SE-EAK, 252243 or4A-SE-TL250V or 2522774A-SE-TL250V F903 252164 or5A-UL/T-237 o

23、r 2522585A-T/UL-ST2,Fuse 252075,2.5A-SE-EAK, 252241 or2.5A-SE-TL250V or 2522752.5A-SE-TL250V,Fuse F9501,F9502 252160 or2.5A-UL/T-237 or 2522542.5A-T/UL-ST2,Fuse 252075,2.5A-SE-EAK, 252241 or2.5A-SE-TL250V or 2522752.5A-SE-TL250V,Fuse F9503,F9504 252158 or1.6A-UL/T-237 or 2522521.6A-T/UL-ST2,Fuse 252

24、073,1.6A-SE-EAK, 252239 or1.6A-SE-TL250V or 2522731.6A-SE-TL250V,Fuse RadioFans.CN 收音机爱 好者资料库 DTR-7.4 PANEL VIEWS FRONT PANEL Protective caps Protective caps are provided for the Video 5 jacks. Be sure to always attach the protective caps when you are not connecting a device to the Video 5 jacks. Ma

25、ster VolumeStandby/On UpsamplingPure Audio Audio Selector TapeTunerPhonoNet AudioCDVideo 1 VCR 1 Video 3Video 2 VCR 2 Video 4Video 5DVD Zone 2 ()GRN Rec ( )RED A-FO RM Listening Mode Memory Video 5 Input StereoDirect / Pure AudioDSPSurroundTHX Clear Rec OutZone 2Of f Setup Tuning Preset Enter Return

26、 DimmerDisplay S VideoAudioVideoLR Phones Standby MemoryFM Mode DTR-7.4 Digital Video 5 Input S VideoAudioVideoLR DTR-7.4 Digital Protective caps DTR-7.4 PANEL VIEWS FRONT PANEL Standby/On button This button is used to set the DTR-7.4 to On or Standby. In the standby state, the display is turned off

27、 and 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 Press to switch between the direct and pur

28、e 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. Dimmer button Press to set the brightness of

29、 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 button Selects for the Dolby Pro Logic II, DTS Neo:6, Dolby Digital,

30、 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 press to delete a previously preset stati

31、on. 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 or there is a great deal of noise, s

32、witch from AUTO to MONO. Tuning / buttons These 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 Out button This button is used to

33、 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 OUT , VIDEO 2 OUT) or Zone 2. Setu

34、p 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 one level. If pressed while at

35、 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 indicators (DVD, Video 15, Tape, Tuner

36、, 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. The input channel with its indi-

37、 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. Phones jack This is a standa

38、rd stereo jack for connecting stereo headphones. Pure Audio indicator Lights during pure audio playback. DTR-7.4 PANEL VIEWS FRONT PANEL REAR PANEL AInput signal path indicators Shows from which terminal the input signal is com- ing. BListening mode or digital input format indicators One of these in

39、dicators 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 indicators AUTO indicator Lights when receiving FM broadcasts in the stereo mode. Turns of f when placed into the monaural mode.

40、TUNED indicator Lights when a radio station is being received. FM STEREO indicator Lights when an FM broadcast station is being received in stereo. Turns off when placed into the monaural mode. DMulti function display During normal operation, shows the current input source and volume. When the FM or

41、 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 display Shows the volume level. FSLEEP indicator Lights when th

42、e sleep timer is turned on. FM 75 OUT OUT OUT OUT L PHONO PRE OUT FRONT SUB SURR RL AUDIO RL CD TAPE RL AUDIOVIDEO S VIDEO MONITOR OUT RL IN IN IN IN IN IN IN ZONE 2 DVD VIDEO 1 VIDEO 2 VIDEO 3 VIDEO 4 AUDIOAUDIOVIDEO S VIDEO GND SURR BACK/ ZONE 2 RL IN AC INLET R CENTER ETHERNET (Net -Tune) RL MULT

43、I CH INPUT FRONT SUB SURR SURR BACK CENTER RL ANTENNA Y PB PR OUTPUT INPUT 1 Y PB PR INPUT 2 Y PB PR SURR BACK/ ZONE 2 SPEAKERS FRONT SPEAKERS LRLR SURR SPEAKERS CENTER SPEAKER RL AC OUTLETS AC 120 V 60 Hz SWITCHED TOTAL 120W 1A MAX. IN ZONE 2 REMOTE CONTROL A BOUT 12 V TRIGGER OUT DIGITAL IN OPT 2

44、1 2 3 1 3 COAX OPT 1 2 DIGITAL OUT AV RECEIVER MODEL NO. DTR-7.4 RATING: AC 120 V 60 Hz 8.1 A COMPONENT VIDEO I R RS232 AM DTR-7.4 PANEL VIEWS REAR 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,

45、 connect a power amplifier to this jack. ANTENNA These jacks are for connecting the FM indoor antenna and the 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

46、are for connecting to the video input jacks on television monitors or projectors. COMPONENT VIDEO OUTPUT These 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

47、 terminals are for connecting the speakers. AC OUTLETS This AC outlet is provided to plug in the power cord from 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/C

48、D/TAPE AUDIO IN/OUT These connectors are for connecting to the audio input and output jacks on audio components. 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-

49、 nent video outputs of video components that have them. RS 232 This port is for connecting the DTR-7.4 to home automation and external controllers. IR IN/OUT These connectors are for connecting the remote sen- sor of a multi-room kit (sold separately). 12V TRIGGER OUT ZONE 2 A/B These connectors are used to connect to the 12V TRIGGER IN terminal of a component. This jack is for connecting other Integra/Onkyo components equipped with the same terminal. The audio connection cables must also