NAD-T773VC-avr-sm 维修电路原理图.pdf
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1、NADSERVICE MANUALT 773T 773 PHASE II & VCA/V ReceiverDRAFT DATE: 14 SEPTEMBER 2005RadioFans.CN 收音机爱 好者资料库2SAFETY INFORMATIONAH VERSIONC VERSIONRadioFans.CN 收音机爱 好者资料库3SERVICE SAFETY PRECAUTIONS1. Replacing the fusesCAUTION:FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE
2、 OFFUSE.Reference DesignatorSCMPart NumberDescriptionF751*AH370-019100-00(2)33-0321111-00-88FUSE 10A 250VAC SLOW BLOW5X20mm 5T UL/CSAF751*C370-016100-04(9)33-0161006-00-88FUSE 10A 250VAC TIME-LAG5X20mm 5D VDE/UL/CSAF752*AH370-011100-06(4)33-0111006-00-88FUSE 1.6A 250V TIME LAG5X20mm 5T UL/CSA/VDE/SE
3、MKOF752*C370-015100-02(2)33-0151006-00-88FUSE 800mA 250V TIME LAG5X20mm TSD UL/CSA/VDE/SEMKONOTE: : USA, CANADIAN MODEL ONLY.: EUROPEAN MODEL ONLY.2. Safety check out(Only U.S.A. model)Before returning the product to the customer, make leakage current or resistance measurements to determinethat expo
4、sed parts are acceptably insulated from supply circuit.CONTENTSDESCRIPTIONPAGESPECIFICATIONS. 4 - 5REAR PANEL / FRONT PANEL VIEW . 6DISASSEMBLY INSTRUCTIONS . 7WIRING DIAGRAM. 8 - 10BLOCK DIAGRAM.11SPECIAL FUNCTION . 12DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING . 12ADJUSTMENT POINTS DIAGRAM /
5、AMPLIFIER ADJUSTMENT . 13PCB LAYOUT . 14 - 25SCHEMATIC DIAGRAM . 26 - 43IC BLOCK DIAGRAM . 44 - 52EXPLODED VIEW & EXPLODED VIEW PARTS LIST . 53 - 55EXPLODED VIEW & EXPLODED VIEW PARTS LIST - FANS & HEATSINK. 56 - 57EXPLODED VIEW & EXPLODED VIEW PARTS LIST - TRANSFORMER . 58ELECTRICAL PARTS LIST . 59
6、 - 72PACKING DIAGRAM . 73Parts marked with the symbol are critical with regard to the risk of fire and electric shock.Replace only with parts recommended by the manufacturer.4SPECIFICATIONSPOWER AMPLIFIER SECTIONRated distortion(Rated power level into 8 ohms, THD 20 Hz-20 kHz FL/C/FR) 0.1 %(Rated po
7、wer level into 8 ohms, THD 20 Hz-20 kHz SL/SR/BS) 0.1 %Input Sensitivity(ref. 8 ohms, 1 kHz) 387 20 mVS/N Ratio(A-wtd, 1kHz, 1 W, 8 ohm, SL/SR/BL) - 75 dBFrequency Response(20 Hz - 20 kHz)0 1.0 dBChannel Balance(1 dB to -40 dB, 1 kHz) 2 dB(-41 dB to -50 dB, 1 kHz) 3 dBAudio muting at 1 kHz 55 dBSubw
8、oofer out, 500 mV in (THD at 2 V O/P, 100 Hz) 0.5 %Crosstalk(500 mV input, 10 W, 1 kHz) -57 dBControlsBass(at 500 mV in, 1 W out, 100 Hz) 10 dB 2 dBTreble(at 500 mV in, 1 W out, 10 kHz) 10 dB 2 dBDOLBY DIGITAL SECTIONChannel Difference(FL ref. Track 30) 1.2 dBFrequency Resporse at Dolby config.2SL T
9、rack 46 200 - 20 kHz 0.8 dBSR Track 47 200 - 20 kHz 0.8 dBC Track 44 200 - 20 kHz 0.8 dBHarmonic Distortion(1 W, Audio LPF, Dolby Congfig 1)FL Track 65 997 Hz 0.08 %FR Track 67 997 Hz 0.08 %SL Track 68 997 Hz 0.08 %SR Track 69 997 Hz 0.08 %C Track 66 997 Hz 0.08 %S/N Ratio(TRACK 30 for O/P 1 W, FAUS
10、E)CCIR / ARM 65 dBAudio LPF 70 dBA-WTD 70 dBChannel Separation(1 W, A-WTD FILTER)Track 65 997 Hz 60 dBDOLBY PRO LOGIC II SECTIONFrequency ResporseI/P mode : L, R: 1 V in, 1 W, Ch L/R40 Hz0 2.0 dB20 kHz0 2.0 dBI/P mode : L=R: 1 V in, 1 W, Ch /L/R40 Hz0 2.0 dB Ch C20 kHz0 2.0 dBI/P mode : L=-R: 1 V in
11、, 1 W, Ch SL/SR40 Hz0 2.0 dB20 kHz0 2.0 dBS/N Ratio (200 mV in, 1 W, A-WTD w/ 1 k termination)I/P mode : L, R: 1 kHz, Ch L/R 65 dBI/P mode : L=R: 1 kHz, Ch C 65 dBI/P mode : L=-R: 1 kHz, Ch SL/SR 65 dBTHD (2.2 V in, 1 W, w/ 80 kHz LPF, 1 kHz) 0.2 %5DTS SECTIONOutput Level (Vol 0 dB): FL/FR/C/SL/SRTr
12、ack 61 kHz0.3 - 1.3 WChannel Difference (FL ref): FL/FR/C/SL/SRTrack 61 kHz 1.0 dBHarmonic Distortion (Audio Filter) : FL/FR/C/SL/SRTrack 10-14 1 kHz 0.08 %Frequency Response (20 Hz to 20 kHz)Track 26-30+2/-1.5 dBSubwoofer Output Level1 kHz ref at pre-out (FL)Play Track 10, charge to 1512.5 1.5 dBAM
13、 TUNER SECTIONInput level is expressed as the reading in open circuitof 75-ohm source impedance signal generatorUsable sensitivity(999/1000 kHz) 30 dBuVS/N Ratio(5 mV in) 38 dBTHD(5 mV in) 3 %IF Rejection(450 kHz) 36 dBImage Rejection(F+2xIF) 28 dBSelectivity 17 dBOutput170 -20/+30 mVLoop sensitivit
14、y(20 dB S/N)999/1000 kHz 66 dB603/600 kHz 66 dB1404/1400 kHz 66 dBFrequency Response(100 - 2.3 kHz, 5 mV) 6 dBFM TUNER SECTION*C*AHInput level is expressed as the reading in open circuitof 75-ohm source impedance signal generatorUsable sensitivity(98 MHz) 15 dB 15 dB vS/N Ratio(60 dB, IHF wtd)Mono 6
15、3 dB 63 dBStereo 63 dB 63 dBFrequency Response(20 Hz - 15 kHz, 60 dB )0 1.5 dB0 1.5 dBChannel Separation(60 dB )100 Hz 30 dB 30 dB1 k 38 dB 38 dB10 kHz 30 dB 30 dBAlternate Channel Selectivity (40 dB , 400 kHz) 60 dB 45 dBCapture Ratio(40 dB ) 3 dB 3 dBAM Suppression (60 dB, 100% Mod. FM, 30% Mod. A
16、M) 48 dB 48 dBImage Rejection(119.4 MHz) 65 dBI.F. Rejection(10.7 MHz) 78 dB Pilot Suppression(98 MHz) 60 dB 60 dBTHD (60 dB , L=R 75 kHz for AH, 40 kHz Dev for C)Mono 0.25 % 0.25 %Stereo 0.35 % 0.35 %Auto-Search SensitivityOn 24 dB 24 dB Off 15 dB 15 dB RDS decode Sensitivity 26 dB PHYSICAL SPECIFI
17、CATIONSDimensions (Width x Height x Depth)435 x 195 x 423 mmNet Weight24 Kg (52.80 lbs)Shipping Weight30.7 Kg (67.50 lbs)6FMFRONTLFRONTRFRONTSURRSURR-BSUBWDISCSURRLSURRRSURR-BACKLSURR-BACKRSUBW 1CENTERRLGNDAMTRIGGERAUTOOFFSOFT CLIPPINGONOFF11CBCRYCBCRY2CBCRY3CBCRY23456ANTENNAVIDEO 5VIDEO 4SUBW 2AUDI
18、OPRE-OUTTAPEVCRSATDVDMONITOROUT7.1 CH INPUTOUTINOUTOUT123INININOUTINOUTINININCOMPONENT VIDEO OUTDIGITAL OUTDIGITAL INSPEAKER ALRFRONTLRSURROUNDLRSURR-BACKLRCENTERSWITCHED120V60HzAC OUTLET120V60Hz120W 1A MAXSPEAKER BRS-232OPTICALCOAXIALCOMPONENT VIDEO INIR+12V TRIGGERSerial No./No. De SeriesCAUTION :
19、 SPEAKER IMPEDANCESPK A FRONT / SPK B : 4 MIN/SPEAKERSPK A FRONT + SPK B : 8 MIN/SPEAKERCENTER, SURR, SURR-BACK : 4 MIN/SPEAKERMAIN INONOFFSWITCHED230V50HzAC OUTLET230V50Hz120W 0.5A MAX T 773 (C) EUROPEAN VERSION21179101116151983457618121314CENTERRLAUDIOVIDEOS-VIDEORLCDMS OUTPOWERFRONT PANELREAR PAN
20、EL / FRONT PANEL VIEWREAR PANEL1.FM & AM ANTENNA2.IR INPUT & OUTPUT3.+12V TRIGGER INPUT & OUTPUT4.SOFT CLIPPING ON/OFF5.MS OUT (MULTISOURCE OUT)6.MONITOR OUT7.CD INPUT8.COMPONENT VIDEO IN &COMPONENT VIDEO OUT9.DIGITAL AUDIO INPUT &DIGITAL AUDIO OUTPUT10.RS-23211.POWER SWITCH12.SWITCHED AC OUTLETS13.
21、AC POWER INLET14.SPEAKERS A & B15.DVD, SAT, VCR, VIDEO 4 & VIDEO 516.MAIN IN / AUDIO PRE-OUTS /SUBWOOFER OUT17.TAPE INPUT & OUTPUT18.DISC INPUT19.7.1 CH. INPUTS1.STANDBY SWITCH2.STANDBY LED3.AM / FM6.FM MUTE / MODE4.DISPLAY5.MEMORY7.PRESET DOWN / UP8.SEARCH DOWN / UP9.VFL DISPLAY10.VOLUME (SETUP)11.
22、VIDEO & AUDIO12.TAPE MONITOR13.DIGITAL AUDIO SELECTOR14.EXT. 7.115.SURROUND MODE16.LEVELS17.TONE CONTROLS18.TONE DEFEAT19.SPEAKERS A & B20.VIDEO 6 INPUT21.PHONES7DISASSEMBLY INSTRUCTIONS1.Remove machine screws M4.0 x 8.0 (1 to 8) from the side panels.Remove tapping screw 3.0 x 8.0 (9 to 12) from the
23、 back panel.Refer to Figure No. 1.1234891011125672.Pull both sides of the TOP COVER slightly outwards 13 and tilt approx. 35 and then removein the direction as indicated by the arrow 14. Refer to Figure No. 2.Figure No. 1141313Figure No. 28WIRING DIAGRAM9ITEMPART NO.DESCRIPTIONREMARK1276-041823-05CA
24、BLE ASSY 4 WAYS AWG=18 3.96PA1 BD-J505BUL1007 L=280mm2276-041823-11CABLE ASSY 4 WAYS AWG=18 3.96PA1 BD-J581BUL1007 L=420mm YB03053103-03A3276-062613-22CABLE ASSY 6 WAYS AWG=26 2.5PA1 BD-J503AUL1007 L=320mm4276-031823-06CABLE ASSY 3 WAYS AWG=18 3.96PA2 BD-J509BUL1007 L=180mm5276-041823-02CABLE ASSY 4
25、 WAYS AWG=18 3.96PA2 BD-J781BUL1007 L=200mm REV.B6276-042613-08CABLE ASSY 4 WAYS AWG=26 2.5PAU BD-J3103AL=450mm YB03091104-027276-022613-07CABLE ASSY 2 WAYS AWG=26 2.5PDG BD-J1009AUL1533 L=540mm8276-042613-06CABLE ASSY 4 WAYS AWG=26 2.5PDG BD-J1010AUL2468 L=540mm9276-042613-10CABLE ASSY 4 WAYS AWG=2
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