NAD-T773Phase2-avr-sm 电路图 维修手册.pdf

《NAD-T773Phase2-avr-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《NAD-T773Phase2-avr-sm 电路图 维修手册.pdf（78页珍藏版）》请在收音机爱好者资料库上搜索。

1、NAD SERVICE MANUALT 773 T 773 PHASE II & VC A/V Receiver DRAFT DATE: 14 SEPTEMBER 2005 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

2、 WITH SAME TYPE OF FUSE. Reference DesignatorSCMPart NumberDescription F751*AH370-019100-00(2)33-0321111-00-88FUSE 10A 250VAC SLOW BLOW 5X20mm 5T UL/CSA F751*C370-016100-04(9)33-0161006-00-88FUSE 10A 250VAC TIME-LAG 5X20mm 5D VDE/UL/CSA F752*AH370-011100-06(4)33-0111006-00-88FUSE 1.6A 250V TIME LAG

3、5X20mm 5T UL/CSA/VDE/SEMKO F752*C370-015100-02(2)33-0151006-00-88FUSE 800mA 250V TIME LAG 5X20mm TSD 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 meas

4、urements to determine that exposed parts are acceptably 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 & DE

5、BUGGING . 12 ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT . 13 PCB LAYOUT . 14 - 25 SCHEMATIC DIAGRAM . 26 - 43 IC BLOCK DIAGRAM . 44 - 52 EXPLODED VIEW & EXPLODED VIEW PARTS LIST . 53 - 55 EXPLODED VIEW & EXPLODED VIEW PARTS LIST - FANS & HEATSINK. 56 - 57 EXPLODED VIEW & EXPLODED VIEW PARTS LI

6、ST - TRANSFORMER . 58 ELECTRICAL PARTS LIST . 59 - 72 PACKING DIAGRAM . 73 Parts marked with the symbol are critical with regard to the risk of fire and electric 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 dis

7、tortion(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) 387 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

8、 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 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 DIGITA

9、L 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 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

10、 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 Channel 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

11、 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 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 kH

12、z, 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 Difference (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 (2

13、0 Hz to 20 kHz)Track 26-30+2/-1.5 dB 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 expressed 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)

14、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 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*AH Input level is expressed as

15、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 dB 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

16、 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. 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,

17、 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 SPECIFICATIONS Dimensions (Width x Height x Depth)435 x 195 x 423 mm Net Weight24 Kg (52.80 lbs) Shipping Weight30.7 Kg (67.50 lbs) 6 FM FRONT L FRONT

18、 R FRONTSURRSURR-BSUBWDISC SURR L SURR R SURR-BACK L SURR-BACK R SUBW 1CENTER RL GNDAM TRIGGER AUTOOFF SOFT CLIPPING ON OFF 1 1 CBCRYCBCRY 2 CBCRY 3 CBCRY 23456 ANTENNA VIDEO 5 VIDEO 4 SUBW 2 AUDIO PRE-OUT TAPE VCR SAT DVD MONITOR OUT 7.1 CH INPUT OUT IN OUTOUT 123 ININ IN OUT IN OUT IN IN IN COMPON

19、ENT VIDEO OUT DIGITAL OUTDIGITAL IN SPEAKER A LR FRONT LR SURROUND LR SURR-BACK LR CENTER SWITCHED 120V60Hz AC OUTLET 120V60Hz 120W 1A MAX SPEAKER B RS-232 OPTICALCOAXIAL COMPONENT VIDEO IN IR+12V TRIGGER Serial No./No. De Series CAUTION : SPEAKER IMPEDANCE SPK A FRONT / SPK B : 4 MIN/SPEAKER SPK A

20、FRONT + SPK B : 8 MIN/SPEAKER CENTER, SURR, SURR-BACK : 4 MIN/SPEAKER MAIN IN ON OFF SWITCHED 230V50Hz AC OUTLET 230V50Hz 120W 0.5A MAX T 773 (C) EUROPEAN VERSION 2 1 17910111615 19 834576 18 121314 CENTER RL AUDIOVIDEOS-VIDEO RL CD MS OUT POWER FRONT PANEL REAR PANEL / FRONT PANEL VIEW REAR PANEL 1

21、.FM & AM ANTENNA 2.IR INPUT & OUTPUT 3.+12V TRIGGER INPUT & OUTPUT 4.SOFT CLIPPING ON/OFF 5.MS OUT (MULTISOURCE OUT) 6.MONITOR OUT 7.CD INPUT 8.COMPONENT VIDEO IN & COMPONENT VIDEO OUT 9.DIGITAL AUDIO INPUT & DIGITAL AUDIO OUTPUT 10.RS-232 11.POWER SWITCH 12.SWITCHED AC OUTLETS 13.AC POWER INLET 14.

22、SPEAKERS A & B 15.DVD, SAT, VCR, VIDEO 4 & VIDEO 5 16.MAIN IN / AUDIO PRE-OUTS / SUBWOOFER OUT 17.TAPE INPUT & OUTPUT 18.DISC INPUT 19.7.1 CH. INPUTS 1.STANDBY SWITCH 2.STANDBY LED 3.AM / FM 6.FM MUTE / MODE 4.DISPLAY 5.MEMORY 7.PRESET DOWN / UP 8.SEARCH DOWN / UP 9.VFL DISPLAY 10.VOLUME (SETUP) 11.

23、VIDEO & AUDIO 12.TAPE MONITOR 13.DIGITAL AUDIO SELECTOR 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 8) from the side panels. Remove tapping screw 3.0 x 8.0 (9 t

24、o 12) from the back panel. Refer to Figure No. 1. 1 2 3 4 8 9 10 11 12 5 6 7 2.Pull both sides of the TOP COVER slightly outwards 13 and tilt approx. 35 and then remove in the direction as indicated by the arrow 14. Refer to Figure No. 2. Figure No. 1 14 13 13 Figure No. 2 8 WIRING DIAGRAM 9 ITEMPAR

25、T NO.DESCRIPTIONREMARK 1276-041823-05CABLE ASSY 4 WAYS AWG=18 3.96PA1 BD-J505B UL1007 L=280mm 2276-041823-11CABLE ASSY 4 WAYS AWG=18 3.96PA1 BD-J581B UL1007 L=420mm YB03053103-03A 3276-062613-22CABLE ASSY 6 WAYS AWG=26 2.5PA1 BD-J503A UL1007 L=320mm 4276-031823-06CABLE ASSY 3 WAYS AWG=18 3.96PA2 BD-

26、J509B UL1007 L=180mm 5276-041823-02CABLE ASSY 4 WAYS AWG=18 3.96PA2 BD-J781B UL1007 L=200mm REV.B 6276-042613-08CABLE ASSY 4 WAYS AWG=26 2.5PAU BD-J3103A L=450mm YB03091104-02 7276-022613-07CABLE ASSY 2 WAYS AWG=26 2.5PDG BD-J1009A UL1533 L=540mm 8276-042613-06CABLE ASSY 4 WAYS AWG=26 2.5PDG BD-J101

27、0A UL2468 L=540mm 9276-042613-10CABLE ASSY 4 WAYS AWG=26 2.5PDG BD-J901A UL2877 L=430mm 10276-011843-01CABLE ASSY 1 WAY AWG18 UL1007 BLACKKE BD-J201 L=100mm W/ RING TERMINAL 11276-052613-08CABLE ASSY 5 WAYS #26 2.5P UL1007 L=160mmLED BD-J204A 12276-011843-03CABLE ASSY 1 WAY AWG=18 UL1007 BLACKMAIN B

28、D-J701 L=360mm W/ RING TERMINAL 13276-032613-18CABLE ASSY 3 WAYS AWG=26 2.5P L=110mmMAIN BD-J6106B 14276-032613-19CABLE ASSY 3 WAYS AWG=26 2.5P L=60mmMAIN BD-J6105B 15276-032613-29CABLE ASSY 3 WAYS AWG26X2C UL2547MAIN BD-J715A L=210mm (UL LABEL) 16276-082613-22CABLE ASSY 8 WAYS AWG=26X3C L=480mmMAIN

29、 BD-J709A 17276-102613-11CABLE ASSY 10 WAYS AWG=26 2.5P UL1007MAIN BD-J350B L=260mm (UL LABEL) 18276-122613-12CABLE ASSY 12 WAYS AWG=26 2.5P L=300mmMAIN BD-J502B 19276-142613-02CABLE ASSY 14 WAYS #26 2.5P UL1007 L=540mmMAIN BD-J8101B 20276-031823-11CABLE ASSY 3 WAYS AWG=18 3.96P UL1015SPK BD-J582B1

30、/ L=350mmB2/B3 21276-041823-10CABLE ASSY 4 WAYS AWG=18 3.96P UL1007SPK BD-J782B1 / L=320mmB2/B3/B4 22276-051823-07CABLE ASSY 5 WAYS AWG=18 3.96P UL1007SPK BD-J501B1 / L=250mm (V/BL/Y)B3/B5 23276-051823-10CABLE ASSY 5 WAYS AWG=18 3.96P UL 1007SPK BD-J801B1 / L=120mm (R/BK/BR/BK/O)B2/B3/B4/B5 24276-05

31、1823-11CABLE ASSY 5 WAYS AWG=18 3.96P UL1007SPK BD-J504B1 / L=320 (BK/W/BL)B2/B5 25276-062613-09CABLE ASSY 6 WAYS AWG=26 2.5P UL 1533X1CPO BD-J611A L=540mm REV.B 26276-082613-09CABLE ASSY 8 WAYS AWG=26 2.5P UL1533PO BD-J612A L=340mm YB03053103-02A 27276-042613-07CABLE ASSY 4 WAYS AWG=26 2.5P UL2468P

32、S BD-J753A L=400mm 28276-011643-59CABLE ASSY 1 WAY AWG=16 UL1672 BROWNPW BD-J756B L=120mm YB04072905-02 29276-011643-60CABLE ASSY 1 WAY AWG=16 UL1672 BLUEPW BD-J757B L=120mm YB04072905-01 30276-022613-05CABLE ASSY 2 WAYS AWG=26 2.5P UL2468ISC S BD-J811B L=340mm 31276-022613-06CABLE ASSY 2 WAYS AWG=2

33、6 2.5P UL2468ISC F BD-J511B L=440mm 32276-021823-02CABLE ASSY 2 WAYS AWG=18 UL1007SE BD-J8105B, L=170MM S0436-03-02J8205B 10 ITEMPART NO.DESCRIPTIONREMARK 33276-061823-00CABLE ASSY 6 WAYS AWG=18 UL1007SE BD-J8202B L=140MM S0436-03-03 34276-061823-02CABLE ASSY 6 WAYS AWG=18 UL1007SE BD-J8102B L=170MM

34、 S0436-03-01 35276-082613-20CABLE ASSY 8 WAYS AWG=26 2.5P UL1007SV BD-J414A L=380mm 36276-011843-01CABLE ASSY 1 WAY AWG18 UL1007 BLACKV6 BD-P4401, L=100mm W/ RING TERMINALP4402 37238-172820-03FFC CABLE 17 PINS P1.25 L=200mm W/ SHIELDJ720C 38238-200016-00FFC CABLE 20 PINS P1.25 L=160mm W/ SHIELDJ604C

35、 39238-280017-00FFC CABLE 28 PINS P1.25 L=170mm W/ SHIELDJ602C,J603C 40238-300222-00FFC CABLE 30 PINS P1.25 L=220mm W/ SHIELDJ713C,J714C 41238-302807-00FFC CABEL 30 PINS P1.25 L=70mmJ601C 42276-011643-23CABLE ASSY 1 WAY AWG=16 UL 1015 GREEN/CHASIS GND, YELLOW L=100mm AC OUTLET GND 43276-011643-29CAB

36、LE ASSY 1 WAY AWG=16 UL1672 BROWNJ761_L, J759 L=100mm 44276-011643-69CABLE ASSY 1 WAY AWG=16 UL1672 BLUEJ761_N, J758 L=100mm 11 BLOCK DIAGRAM 12 SPECIAL FUNCTION FEATUREA AKEYS PRESS ON FRONT PANEL RESET FOR AH VERSIONVIDEO + TONE DEFEAT RESET FOR C VERSIONVIDEO + TONE CONTROLS NTSC / PAL SELECTIONV

37、IDEO + 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 the generated colour bar) DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING T89C51RD2 (U202) main clock is at 20MHz (X202) T89C5

38、1RD2 (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 (W27C02) when changing SURROUND MODES LOWER - CHIP ENABLE (pin 22) of EPROM (W27C02) when changing SURROUND MODES SCLK (pin

39、43 of CS49326) LRCLK (pin 42 of CS49326) MCLK (pin 30 of CS49326) NOTE: The waveforms are based on software version V2.13V. 13 R522R545R571R835 P501P502P503 R835R836R897 P802P801 P803 J511B J811B AMPLIFIER ADJUSTMENT Idle Current 1.Rotate R522 fully clockwise. 2.Connect DC millivoltmeter to P501 (i.

40、e. Across half of R523, 0.22 Ohm resistor). 3.Turn on the unit. 4.Adjust R522 for 2mV reading on voltmeter. 5.Leave power on for at least 5 min, and check for idle current again. 6.Repeat for other channels. (IN FRONT POWER AMP PCB) CHANNELJUMPERVR FLP502R545 FRP53R571 CP503R571 BSRP501R522 (IN SURR

41、OUND POWER AMP PCB) CHANNELJUMPERVR SLP801R835 SRP802R836 BSLP803R897 ISC Sensitivity Rotate J511B & J811B fully clockwise. ADJUSTMENT POINT DIAGRAM FRONT/CENTER AMPLIFIER BOARD SURROUND AMPLIFIER BOARD ISC FRONT AMP BOARDISC SURROUND AMP BOARD 14a COMPONENT VIDEO BOARD DIGITAL BOARD PCB LAYOUT AUDI

42、O BOARD 14b COMPONENT VIDEO BOARD - COMPONENT SIDE COMPONENT VIDEO BOARD - COPPER SIDE 14c COMPONENT VIDEO BOARD revision 3 - COMPONENT SIDE COMPONENT VIDEO BOARD revision 3 - COPPER SIDE 15 DSP BOARD - COPPER SIDE DSP BOARD - COMPONENT SIDE 16 FRONT/CENTER AMPLIFIER BOARD 17 SURROUND AMPLIFIER BOAR

43、D 18 KEY BOARD / LED BOARD - COMPONENT SIDE KEY BOARD / LED BOARD - COPPER SIDE 19 MAIN BOARD 20 MULTI-CHANNEL BOARD - COMPONENT SIDE- COPPER SIDE TRIGGER BOARD 21 POWER SUPPLY (STANDBY) ISC FOR FRONT AMP BOARD - COMPONENT SIDE- COPPER SIDE 22 ISC FOR SURROUND AMP BOARD - COMPONENT SIDE- COPPER SIDE COMPOSITE VIDEO BOARD 23 PRE-OUT BOARD 24 SPEAKER TERMINAL BOARD POWER SWITCH / VIDEO 6 BOARD SECONDARY BOARD 25 S-VIDEO BOARD 26 SCHEMATIC DIAGRAM AUDIO SWITCH R