NAD-T763VC-avr-sm 电路图 维修手册.pdf

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1、NAD SERVICE MANUALT 763 T 763 PHASE II & VC DRAFT DATE: 17 MAR 2006 New Text RadioFans.CN 收音机爱 好者资料库 2 SAFETY INFORMATION AH VERSION C VERSION RadioFans.CN 收音机爱 好者资料库 3 SERVICE SAFETY PRECAUTIONS 1. Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME

2、 TYPE OF FUSE. Reference DesignatorDatabase Part NumberDescription F751*AH,AHT370-019100-00(2)FUSE TIME-LAG 10A/250VAC 5X20mm UL/CSA 5T F751*C,CT370-018100-05(2)FUSE TIME-LAG 10A/250VAC 5X20mm VDE/UL/CSA 5T F752*AH,AHT370-011100-06(4)FUSE 1.6A 250V TIME LAG LBC 5x20mm 5T UL/CSA/VDE/SEMKO F752*C,CT37

3、0-015100-03(3)FUSE 800mA 250V TIME LAG LBC 5x20mm 5T UL/CSA/VDE/SEMKO NOTE: : 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 determine that exposed parts are acc

4、eptably insulated from supply circuit. CONTENTS DESCRIPTIONPAGE SPECIFICATIONS. 4 - 5 REAR PANEL / FRONT PANEL VIEW . 6 DISASSEMBLY INSTRUCTIONS . 7 WIRING DIAGRAM. 8 - 10 BLOCK DIAGRAM.11 SPECIAL FUNCTION . 12 DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING . 12 ADJUSTMENT POINTS DIAGRAM / AMPLIFI

5、ER ADJUSTMENT . 13 PCB LAYOUT . 14 - 28 SCHEMATIC DIAGRAM . 29 - 46 IC BLOCK DIAGRAM . 47 - 55 EXPLODED VIEW. 56 EXPLODED VIEW PARTS LIST. 57 - 59 ELECTRICAL PARTS LIST . 60 - 79 PACKING DIAGRAM . 80 VERSION HISTORY . 81 Parts marked with the symbol are critical with regard to the risk of fire and e

6、lectric shock. Replace only with parts recommended by the manufacturer. RadioFans.CN 收音机爱 好者资料库 4 SPECIFICATIONS POWER AMPLIFIER SECTION Rated 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(

7、ref. 8 ohms, 1 kHz)366 20 mV S/N Ratio(A-wtd, 1kHz, 1 W, 8 ohm, SL/SR/BL) - 75 dB Frequency Response(20 Hz - 20 kHz)0 1.0 dB Channel Balance(1 dB to -40 dB, 1 kHz) 2 dB (-41 dB to -50 dB, 1 kHz) 3 dB Audio muting at 1 kHz 55 dB Subwoofer out, 500 mV in (THD at 2 V O/P, 100 Hz) 0.5 % Crosstalk(500 mV

8、 input, 10 W, 1 kHz) -57 dB Controls Bass(at 500 mV in, 1 W out, 100 Hz) 10 dB 2 dB Treble(at 500 mV in, 1 W out, 10 kHz) 10 dB 2 dB DOLBY DIGITAL SECTION Channel Difference(FL ref. Track 30) 1.2 dB Frequency Resporse at Dolby config.2SL Track 46 200 - 20 kHz 0.8 dB SR Track 47 200 - 20 kHz 0.8 dB C

9、 Track 44 200 - 20 kHz 0.8 dB Harmonic 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, FAUSE)CCIR / ARM 65 dB Audio LPF 70 dB A-WTD 70 dB Channe

10、l Separation(1 W, A-WTD FILTER)Track 65 997 Hz 60 dB DOLBY PRO LOGIC II SECTION Frequency Resporse I/P mode : L, R: 1 V in, 1 W, Ch L/R40 Hz0 2.0 dB 20 kHz0 2.0 dB I/P mode : L=R: 1 V in, 1 W, Ch /L/R40 Hz0 2.0 dB Ch C20 kHz0 2.0 dB I/P mode : L=-R: 1 V in, 1 W, Ch SL/SR40 Hz0 2.0 dB 20 kHz0 2.0 dB

11、S/N Ratio (200 mV in, 1 W, A-WTD w/ 1 k termination) I/P mode : L, R: 1 kHz, Ch L/R 65 dB I/P mode : L=R: 1 kHz, Ch C 65 dB I/P mode : L=-R: 1 kHz, Ch SL/SR 65 dB THD (2.2 V in, 1 W, w/ 80 kHz LPF, 1 kHz) 0.2 % 5 DTS SECTION Output Level (Vol 0 dB): FL/FR/C/SL/SRTrack 61 kHz0.3 1.3 W Channel Differe

12、nce (FL ref): FL/FR/C/SL/SRTrack 61 kHz 1.0 dB Harmonic 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 Subwoofer Output Level1 kHz ref at pre-out (FL)Play Track 10, charge to 1512.5 1.5 dB AM TUNER SECTION Input level is expre

13、ssed as the reading in open circuit of 75-ohm source impedance signal generator Usable sensitivity(999/1000 kHz) 30 dBuV S/N Ratio(5 mV in) 38 dB THD(5 mV in) 3 % IF Rejection(450 kHz) 36 dB Image Rejection(F+2xIF) 28 dB Selectivity 17 dB Output170 -20/+30 mV Loop sensitivity(20 dB S/N) 999/1000 kHz

14、 66 dB 603/600 kHz 66 dB 1404/1400 kHz 66 dB Frequency Response(100 - 2.3 kHz, 5 mV) 6 dB FM TUNER SECTION *C, *CT *AH, *AHT Input level is expressed as the reading in open circuit of 75-ohm source impedance signal generator Usable sensitivity(98 MHz) 15 dB 15 dB v S/N Ratio(60 dB, IHF wtd)Mono 63 d

15、B 63 dB Stereo 63 dB 63 dB Frequency Response(20 Hz - 15 kHz, 60 dB)0 1.5 dB0 1.5 dB Channel Separation(60 dB)100 Hz 30 dB 30 dB 1 k 38 dB 38 dB 10 kHz 30 dB 30 dB Alternate Channel Selectivity (40 dB, 400 kHz) 60 dB 45 dB Capture Ratio(40 dB) 3 dB 3 dB AM Suppression (60 dB, 100% Mod. FM, 30% Mod.

16、AM) 48 dB 48 dB Image Rejection(119.4 MHz) 65 dB I.F. Rejection(10.7 MHz) 78 dB Pilot Suppression(98 MHz) 60 dB 60 dB THD (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 SP

17、ECIFICATIONS Dimensions (Width x Height x Depth)435 x 170 x 423 mm Net Weight20.50 Kg (45.10 lbs) Shipping Weight24.0 Kg (52.80 lbs) 6 123456789 21 10 20111912131415161718 T 763 (AH) NORTH AMERICA T 763 (C) EUROPEAN VERSION 25 1 17151613101112 19 396784 18 14 FRONT PANEL REAR PANEL / FRONT PANEL VIE

18、W REAR PANEL 1.FM & AM ANTENNA 2.MAIN IN / AUDIO PRE-OUTS / SUBWOOFER OUT 3.SOFT CLIPPING ON/OFF 4.MONITOR OUT 5.MS OUT (MULTISOURCE OUT) 6.CD INPUT 7.IR INPUT & OUTPUT 8.12V TRIGGER INPUT & OUTPUT 9.COMPONENT VIDEO IN & COMPONENT VIDEO OUT 10.DIGITAL AUDIO INPUT & DIGITAL AUDIO OUTPUT 11.RS-232 12.

19、POWER SWITCH 13.SWITCHED AC OUTLETS 14.AC POWER INLET 15.SPEAKERS A & B 16.DVD, SAT, VCR, VIDEO 4 & VIDEO 5 17.TAPE INPUT & OUTPUT 18.DISC INPUT 19.7.1 CH. INPUTS 1.STANDBY SWITCH 2.STANDBY LED 3.AM / FM 4.FM MUTE / MODE 5.DISPLAY 6.MEMORY 7.PRESET DOWN / UP 8.SEARCH DOWN / UP 9.VFL DISPLAY 10.VOLUM

20、E (SETUP) 11.VIDEO & AUDIO 12.TAPE MONITOR 13.DIGITAL AUDIO SELEC- TOR 14.EXT. 7.1 15.SURROUND MODE 16.LEVELS 17.TONE CONTROLS 18.TONE DEFEAT 19.SPEAKERS A & B 20.VIDEO 6 INPUT 21.PHONES 7 DISASSEMBLY INSTRUCTIONS 1.Remove machine screws M4.0 x 8.0 (1 to 6) from the side panels. Remove tapping screw

21、 3.0 x 8.0 (7 to 10) from the back panel. Refer to Figure No. 1. 2.Pull both sides of the TOP COVER slightly outwards 11 and tilt approx. 35 and then remove in the direction as indicated by the arrow 12. Refer to Figure No. 2. Figure No. 1 Figure No. 2 8 KEYBOARD MAIN BOARD TRIGGER BOARD POWER SWITC

22、H BOARD J8101B J713AJ714A J715A J719A J720A J717A J710A J711A J712A J707A J704A J502B J709A J713BJ714B J203A J204B J901B J753B VIDEO 6 INPUT BOARD J758B J757B J709B DSP BOARD J604B J715B J1009B J1010B LED BOARD PSU BOARD COMPONENT VIDEO BOARD DIGITAL BOARD AUDIO BOARD VIDEO BOARD SPEAKER A BOARD SPE

23、AKER B BOARD J1009A J1010A RS232 BOARD TUNER PRE-OUT BOARDMULTI-CHANNEL BOARD J717B J611A J612A J6101B J6101A J719B J6104A J708B J707B J350A J414B J710B J711B J712B J414A J704B J3103A S-VIDEO BOARD AMP 2 BOARD (SURROUND AMP.) AMP 1 BOARD (FRONT & CENTER) J612B J502A J503A M506 J511A J581A J781B J503

24、B J611B J801A J901A J753A J754B J751B J504A J501A J757J756 J761_NJ761_L J760 J758 J759 J203B J3103B J6102B J6103B J6102A J6103A J201 J204A J6106AJ6105A J350B J6106A J6105A J504B1 J504B2 J582B1 J582B3 J582B5 J501B1 J501B2 J501B3 J701 J782B1 J782B2 J782B3 P4401 ISC BOARD J782A1 J801B J802B J784A J783A

25、1 J511B J811B J803B SECONDARY BOARD J802AJ801AJ581A J781A J782A J582A J803A2J803A1 J811A J504B3 J801B1 J801B2 J801B3 J801B4 J801B5 J788BJ788AJ786BJ786A J207BJ512A J207B J512B TO MAIN BOARD TO MAIN BOARD TO MAIN BOARD TO MAIN BOARD TO MAIN BOARD FROM TRANSFORMER UL VERSION : USE J758, J759 CE VERSION

26、 : USE J760 MOUNT ON CHASSIS GND 36 37 38 39 35 404142 34 16 33 32 30 29 2728 2625 20 19 18 17 15 14 1312 11 9 10 21 8 7 6 5 3 2 1 23 43 4 22 24 31 4544 THERM SENSNOR WIRING DIAGRAM 9 WIRING DIAGRAM PARTS LIST 1276-022630-00CABLE ASSY 2 WAYS AWG26 2.5P L=480mmAMP1 BD- J511A 2276-041823-05CABLE ASSY

27、4 WAYS AWG=18 3.96P UL1007AMP1 BD- L=280mmJ581A 3276-062613-22CABLE ASSY 6 WAYS AWG=26 2.5P UL1007AMP1 BD- L=320mm (RoHS)J503A 4276-022613-05CABLE ASSY 2 WAYS AWG=26 2.5P UL2468AMP2 BD- L=340mmJ811A 5276-041823-02CABLE ASSY 4 WAYS AWG=18 3.96P UL1007AMP2 BD- L=200mm REV.B (RoHS)J781B 6276-042613-08C

28、ABLE ASSY 4 WAYS AWG26 2.5P UL1533AUDIO BD- L=450MM (ROHS)J3103A 7276-022613-07CABLE ASSY 2 WAYS AWG=26 2.5P UL1533DIGIT BD- L=540mm (ROHS)J1009A 8276-042613-06CABLE ASSY 4 WAYS AWG=26 2.5P UL2468DIGITAL BD- L=540mmJ1010A 9276-011843-01CABLE ASSY 1 WAY AWG18 UL1007 BLACKKEYBOARD- L=100mm W/ RING TER

29、MINAL (RoHS)J201 10276-052613-08CABLE ASSY 5 WAYS AWG26 2.5P UL1007LED BD- L=160mm (RoHS)J204A 11276-011800-00CABLE ASSY 1 WAY AWG18 UL1007 BLACKMAIN BD- L=250mm W/ RING TERMINALJ701 12276-032613-18CABLE ASSY 3 WAYS AWG=26 2.5P L=110mmMAIN BD- J6106B 13276-032613-19CABLE ASSY 3 WAYS AWG=26 2.5P L=60

30、mmMAIN BD- J6105B 14276-032613-29CABLE ASSY 3 WAYS AWG26X2C UL2547MAIN BD- L=210mm (UL LABEL) (RoHS)J715A 15276-082613-22CABLE ASSY 8 WAYS AWG=26X3C L=480mmMAIN BD- (RoHS)J709A 16276-102613-14CABLE ASSY 10 WAYS AWG26 2.5P UL1007MA BD- L=460mm (UL LABEL)J350B 17276-122613-16CABLE ASSY 12 WAYS AWG26 2

31、.5P UL2468MA BD- L=230mm (UL LABEL) (RoHS)J502B 18276-142613-02CABLE ASSY 14 WAYS #26 2.5P UL1007MA BD- L=540mm (RoHS)J8101B 19276-031823-09CABLE ASSY 3 WAYS AWG=18 3.96P UL1015SPK BD- L=320mmJ782B1, J782B2, J782B3 20276-031823-11CABLE ASSY 3 WAYS AWG=18 3.96P UL1015SPK BD- L=350mmJ582B1, J582B2, J5

32、82B3 21276-051840-00CABLE ASSY 5 WAYS AWG18 3.96P UL1007SPK BD- L=270mm (V/BL/Y)J801B1-B5 22276-051823-09CABLE ASSY 5 WAYS AWG=18 3.96P UL1007SPK BD- L=120mm (BR/R/O)J501B1, J501B2, J501B3 23276-031823-16CABLE ASSY 3 WAYS AWG=18 3.96P UL1015SPK BD- L=240mm REV.CJ504B1, J504B2, J504B3 24235-018513-01

33、STRANDED WIRE AWG=18 L=130mm BLACKSPK BD- TIN LEAD UL1007J786A,J788A 25276-062613-05CABEL ASSY 6 WAYS AWG=26 2.5PPO BD-J612A UL1533X1C L=350mm (RoHS) ItemDatabase Part NumberDescriptionRemark 10 ItemDatabase Part NumberDescriptionRemark 26276-062613-10CABLE ASSY 6 WAYS AWG=26 2.5P UL1533PO BD-J611A

34、L=700MM (RoHS) 27276-011643-29CABLE ASSY 1 WAY AWG=16 UL1672PS BD-J756 BROWN L=100mm 28276-011643-69CABLE ASSY 1 WAY AWG=16 UL1672 BLUEPS BD-J757 L=100mm 29276-042613-07CABLE ASSY 4 WAYS AWG26 2.5P UL2468PS BD-J753A L=400mm (ROHS) 30276-041823-07CABLE ASSY 4 WAYS AWG=18 UL1672SE BD-J802A L=150mm 312

35、76-041823-12CABLE ASSY 4 WAYS AWG=18 3.96P UL1007SE BD- L=170mm YB03083002J803A1, J803A2 32276-081823-03CABLE ASSY 8 WAYS AWG=18 3.96P UL1672SE BD-J801A L=150mm 33276-082613-28CABLE ASSY 8 WAYS AWG=26 2.5PSV BD-J414A SHIELDED L=480mm (UL LABEL) (RoHS) 34276-011843-01CABLE ASSY 1 WAY AWG18 UL1007 BLA

36、CKV6 BD-P4401 L=100mm W/ RING TERMINAL (RoHS) 35238-030070-20FFC CABLE 30 PINS P1.25 L=70mmJ601C W/SHIELD 36238-172820-03FFC CABLE 17 PINS P1.25 L=200mmJ720C W/ SHIELD 37238-200016-00FFC CABLE 20 PINS P1.25 L=160mmJ604C W/ SHIELD 38238-280017-00FFC CABLE 28 PINS P1.25 L=170mmJ6102C, W/ SHIELDJ6103C

37、39238-300222-00FFC CABLE 30 PINS P1.25 L=220mmJ713C, W/ SHIELDJ714C 40276-011643-23CABLE ASSY 1 WAY AWG=16 UL 10151-CHASSIS GREEN/YELLOW L=100mm (RoHS) GND 41276-011643-29CABLE ASSY 1 WAY AWG=16 UL16721-INLET/ BROWN L=100mmPSU.BD (L), J761_L 42276-011643-69CABLE ASSY 1 WAY AWG=16 UL1672 BLUE1-INLET/

38、 L=100mmPSU.BD, J761_N 43276-042613-10CABLE ASSY 4 WAYS AWG=26 2.5P UL2877RS BD-J901A L=430mm (RoHS) 44276-022613-18CABLE ASSY 2 WAYS P2.5 AWG26 UL2877CV BD-J512A L=280mm 45276-062613-25CABLE ASSY 6 WAYS AWG26 2.5P UL1007CV BD-J207B L=380mm (RoHS) 11 BLOCK DIAGRAM 12 SPECIAL FUNCTION FEATUREA AKEYS

39、PRESS ON FRONT PANEL RESET FOR AH VERSIONVIDEO + TONE DEFEAT RESET FOR C VERSIONVIDEO + TONE CONTROLS NTSC / PAL SELECTIONVIDEO + MEMORY VFD ALL DISPLAYAUDIO + TAPE MONITOR AM FREQ. STEPAM/FM + FM MUTE COLOUR BAR GENERATORAUDIO + DIGITAL AUDIO (VC-version units only)(all monitor outputs will show th

40、e generated colour bar) DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING T89C51RD2 (U202) main clock is at 20MHz (X202) T89C51RD2 (U201) main clock is at 20MHz (X201) UPPER - +5V supply to KEYBOARD when power up LOWER - RESET line (TCM810LENB713) when power up UPPER - OUTPUT ENABLE (pin 24) of EPROM (

41、W27C02) when changing SURROUND MODES LOWER - CHIP ENABLE (pin 22) of EPROM (W27C02) when changing SURROUND MODES SCLK (pin 43 of CS49326) LRCLK (pin 42 of CS49326) MCLK (pin 30 of CS49326) NOTE: The waveforms are based on software version V2.13V. 13 R522R545R571 P501 P502P503 R881 R834 P803 P802P801

42、 R835R836R897 AMPLIFIER ADJUSTMENT Idle Current 1.Rotate R522 fully clockwise. 2.Connect DC millivoltmeter to P501 (i.e. Across half of R523, 0.22 Ohm resistor). 3.Turn on the unit. 4.Adjust R522 for 1mV reading on voltmeter. 5.Leave power on for at least 5 min, and check for idle current again. 6.R

43、epeat for other channels. CHANNELJUMPERVR FLP501R522 FRP502R545 CP503R571 SLP801R835 SRP802R836 BSP803R897 ISC Sensitivity 1.Connect 8 ohm loading to all channels. 2.Rotate R881 fully clockwise. 3.Load all channels at full power using 1kHz sine wave. 4.At this time, monitor the THD of the SL,SR,BS ou