NAD-T753Phase2-avr-sm 维修电路原理图.pdf
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1、NADSERVICE MANUALT 753T 753 Surround Sound Receiver(Surround Sound ReceiverDRAFT DATE: 9 MAR 2006 PHASE IIRadioFans.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 REP
2、LACE ONLY WITH SAME TYPE OFFUSE.Reference DesignatorDatabase Part NumberDescriptionF751*AH,AHT370-019100-00(2)FUSE TIME-LAG 10A/250VAC 5X20mmUL/CSA 5TF751*C,CT370-015100-03(3)FUSE 800mA 250V TIME LAG LBC5x20mm 5T UL/CSA/VDE/SEMKOF752*AH,AHT370-011100-06(4)FUSE 1.6A 250V TIME LAG LBC5x20mm 5T UL/CSA/
3、VDE/SEMKOF752*C,CT370-018100-05(2)FUSE TIME-LAG 6.3A/250VAC5X20mm VDE/UL/CSA 5TNOTE: 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 exposed parts are a
4、cceptably 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 / AMPLIFIER ADJUS
5、TMENT . 13PCB LAYOUT . 14 - 29SCHEMATIC DIAGRAM . 30 - 46IC BLOCK DIAGRAM . 47 - 54EXPLODED VIEW. 55EXPLODED VIEW PARTS LIST. 56 - 58ELECTRICAL PARTS LIST . 59 - 77PACKING DIAGRAM . 78VERSION HISTORY . 79Parts marked with the symbol are critical with regard to the risk of fire and electricshock.Repl
6、ace 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 power level into 8 ohms, THD 20 Hz-20 kHz SL/SR/BS) 0.1 %Input Sensitivity (ref. 8 ohms, 1 kHz)127 20 mVS/N Ratio(A-wtd, 1k
7、Hz, 1 W, 8 ohm, SL/SR/BL) - 72 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 dBSubwoofer 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
8、 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 Track 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 LP
9、F, 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 (31 for O/P 1 W, Track 35)CCIR / ARM 65 dBAudio LPF 70 dBA-wtd 70 dBChannel Separation (1 W, 20 kHz LPF)Track 65 997 Hz 60 dBDOLBY PRO LOGIC II SEC
10、TIONFrequency ResporseI/P mode : L, R: 1 V in, 1 W, Ch L/R40 Hz0 2.0 dB20 Hz0 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, 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
11、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/SR Track 61 kHz0.3 1.3 WChannel Difference (FL ref): FL/FR/C/SL/SR Track 61 kHz 1.0 dBHarmonic Distortion (Audio Filter) : FL/FR/
12、C/SL/SRTrack 10-14 1 kHz 0.08 %Frequency Response (20 Hz to 20 kHz)Track 26-30+2/-1.5Subwoofer Output Level1 kHz ref at pre-out (FL)Play Track 10, charge to 1512.5 1.5 dBAM TUNER SECTIONInput level is expressed as the reading in open circuitof 75-ohm source impedance signal generatorUsable sensitivi
13、ty(999/1000 kHz) 30 dB VS/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 sensitivity(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
14、*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 63 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
15、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. AM) 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
16、=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 SPECIFICATIONSDimensions (Width x Height x Depth)435 x 170 x 423 mmNet Weight20.50 Kg (45.10 lbs)Shipping Weight24.0 Kg (52.80 lbs)612
17、3456789211020111912131415161718FRONT PANELREAR PANEL / FRONT PANEL VIEWREAR PANEL1.FM & AM ANTENNA2.SOFT CLIPPING ON/OFF3.MONITOR OUT4.CD INPUT5.IR INPUT & OUTPUT6.+12V TRIGGER INPUT & OUTPUT7.COMPONENT VIDEO IN &COMPONENT VIDEO OUT8.DIGITAL AUDIO INPUT &DIGITAL AUDIO OUTPUT9.POWER SWITCH10.SWITCHED
18、 AC OUTLETS11.AC POWER INLET12.SPEAKERS A & B13.DVD, SAT, VCR, VIDEO 4 & VIDEO 514.MAIN IN / AUDIO PRE-OUTS /SUBWOOFER OUT15.TAPE INPUT & OUTPUT16.MS OUT (MULTISOURCE OUT)17.7.1 CH. INPUTS1.STANDBY SWITCH2.STANDBY LED3.AM / FM4.FM MUTE / MODE5.DISPLAY6.MEMORY7.PRESET DOWN / UP8.SEARCH DOWN / UP9.VFL
19、 DISPLAY10.VOLUME (SETUP)11.SOURCE DOWN / UP12.SURROUND MODE13.LEVELS14.TONE DEFEAT15.TONE CONTROLS16.SPEAKERS A & B17.VIDEO 6 INPUT18.PHONES7DISASSEMBLY INSTRUCTIONS1.Remove machine screws M4.0 x 8.0 (1 to 6) from the side panels.Remove tapping screw 3.0 x 8.0 (7 to 10) from the back panel.Refer to
20、 Figure No. 1.2.Pull both sides of the TOP COVER slightly outwards 11 and tilt approx. 35 and thenremove in the direction as indicated by the arrow 12. Refer to Figure No. 2.Figure No. 1Figure No. 28WIRING DIAGRAMKEYBOARDMAIN BOARDTRIGGER BOARDPOWER SWITCHBOARDJ8101BJ713AJ714AJ715AJ719AJ720AJ717AJ71
21、0AJ711AJ712AJ707AJ704AJ502BJ709AJ713BJ714BJ203AJ204BJ901BJ753BVIDEO 6 INPUT BOARDJ758BJ757BJ709BDSP BOARDJ604BJ715BJ1009BJ1010BLED BOARDPSU BOARDCOMPONENT VIDEO DIGITAL BOARD AUDIO BOARDVIDEO BOARDSPEAKER A SPEAKER B J1009AJ1010ARS232 BOARDTUNERPRE-OUT BOARDMULTI-CHANNEL J717BJ611AJ612AJ6101BJ6101AJ
22、719BJ6104AJ708BJ707BJ350AJ414BJ710BJ711BJ712BJ414ASECONDARY BOARDISC BOARDJ801AJ781AJ782AJ582AJ801BJ783A1J511BJ704BJ3103AS-VIDEO BOARDAMP 2 BOARD(SURROUND AMP.)AMP 1 BOARD(FRONT & CENTER)J612BJ502AJ503AM506J511AJ581AJ781BJ503BJ611BJ801AJ901AJ753AJ754BJ751BJ504AJ501AJ757J756J761_NJ761_LJ760J758J759J2
23、03BJ803AJ3103BJ6102BJ6103BJ6102AJ6103AJ201J204AJ6106AJ6105AJ350BJ6106AJ6105AJ8101AJ784AJ803BJ504B1J504B3J582A1J582A3J582A5J501B1J501B3J501B5J582A1J582A3J582A5J701J782A1J782A2J782A3P4402J581BTHERM SENSNORTHERM SENSNORTO MAIN BOARDTO MAIN BOARDTO MAIN BOARDTO MAIN BOARDTO MAIN BOARD82-0426135-01-XXCAB
24、LE ASSY 4 WAYS #26 FROM TRANSFORMERUL VERSION : USE J758, J759CE VERSION : USE J760MOUNT ONCHASSIS GND3334353632373839311530292827262524231920171614131211108921765432118229WIRING DIAGRAM PARTS LISTItemDatabase Part NumberDescriptionRemark1276-022613-06CABLE ASSY 2 WAYS AWG=26 2.5P UL2468AMP1 BD-L=44
25、0mmJ511A2276-041823-11CABLE ASSY 4 WAYS AWG=18 3.96P UL1007AMP1 BD-L=420mm YB03053103-03AJ581A3276-062613-22CABLE ASSY 6 WAYS AWG=26 2.5P UL1007AMP1 BD-L=320mm (RoHS)J503A4276-041823-02CABLE ASSY 4 WAYS AWG=18 3.96P UL1007AMP2 BD-L=200mm REV.B (RoHS)J781B5276-042613-08CABLE ASSY 4 WAYS AWG26 2.5P UL
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