NAD-T753Phase2-avr-sm 电路图 维修手册.pdf

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1、NAD SERVICE MANUALT 753 T 753 Surround Sound Receiver ( Surround Sound Receiver DRAFT DATE: 9 MAR 2006 PHASE II 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

2、RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. Reference DesignatorDatabase Part NumberDescription F751*AH,AHT370-019100-00(2)FUSE TIME-LAG 10A/250VAC 5X20mm UL/CSA 5T F751*C,CT370-015100-03(3)FUSE 800mA 250V TIME LAG LBC 5x20mm 5T UL/CSA/VDE/SEMKO F752*AH,AHT370-011100-06(4)FUSE 1.6A 250V TIME L

3、AG LBC 5x20mm 5T UL/CSA/VDE/SEMKO F752*C,CT370-018100-05(2)FUSE TIME-LAG 6.3A/250VAC 5X20mm VDE/UL/CSA 5T 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

4、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 & DEBUGGING . 12

5、 ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT . 13 PCB LAYOUT . 14 - 29 SCHEMATIC DIAGRAM . 30 - 46 IC BLOCK DIAGRAM . 47 - 54 EXPLODED VIEW. 55 EXPLODED VIEW PARTS LIST. 56 - 58 ELECTRICAL PARTS LIST . 59 - 77 PACKING DIAGRAM . 78 VERSION HISTORY . 79 Parts marked with the symbol are critical w

6、ith 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 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 k

7、Hz SL/SR/BS) 0.1 % Input Sensitivity (ref. 8 ohms, 1 kHz)127 20 mV S/N Ratio(A-wtd, 1kHz, 1 W, 8 ohm, SL/SR/BL) - 72 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

8、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 DIGITAL SECTION Channel Difference(FL ref. Track 30) 1.2 dB Frequency Resporse at Dolby config.2SL Track 46 200 - 20 kHz 0.8

9、 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 68 997 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 d

10、B Audio LPF 70 dB A-wtd 70 dB Channel Separation (1 W, 20 kHz LPF)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 Hz0 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

11、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 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/SR Tr

12、ack 61 kHz0.3 1.3 W Channel Difference (FL ref): FL/FR/C/SL/SR Track 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 A

13、M 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 dB V 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

14、 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 the reading in open circuit of 75-ohm source impedance signal generator Usable sensitivity(98 MHz) 15 dB 15 dB v S/N Ratio(6

15、0 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 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

16、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, 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

17、Sensitivity 26 dB PHYSICAL SPECIFICATIONS 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 FRONT PANEL REAR PANEL / FRONT PANEL VIEW REAR PANEL 1.FM & AM ANTENNA 2.SOFT CLIPPING ON/OFF 3.MON

18、ITOR OUT 4.CD INPUT 5.IR INPUT & OUTPUT 6.+12V TRIGGER INPUT & OUTPUT 7.COMPONENT VIDEO IN & COMPONENT VIDEO OUT 8.DIGITAL AUDIO INPUT & DIGITAL AUDIO OUTPUT 9.POWER SWITCH 10.SWITCHED AC OUTLETS 11.AC POWER INLET 12.SPEAKERS A & B 13.DVD, SAT, VCR, VIDEO 4 & VIDEO 5 14.MAIN IN / AUDIO PRE-OUTS / SU

19、BWOOFER OUT 15.TAPE INPUT & OUTPUT 16.MS OUT (MULTISOURCE OUT) 17.7.1 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.VOLUME (SETUP) 11.SOURCE DOWN / UP 12.SURROUND MODE 13.LEVELS 14.TONE DEFEAT 15.TONE CO

20、NTROLS 16.SPEAKERS A & B 17.VIDEO 6 INPUT 18.PHONES 7 DISASSEMBLY INSTRUCTIONS 1.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 Figure No. 1. 2.Pull both sides of the TOP COVER slightly outwards 11 and tilt appro

21、x. 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 WIRING DIAGRAM KEYBOARD MAIN BOARD TRIGGER BOARD POWER SWITCH BOARD J8101B J713AJ714A J715A J719A J720A J717A J710A J711A J712A J707A J704A J502B J709A J713BJ714B J203A J204B J901B

22、 J753B VIDEO 6 INPUT BOARD J758B J757B J709B DSP BOARD J604B J715B J1009B J1010B LED BOARD PSU BOARD COMPONENT VIDEO DIGITAL BOARD AUDIO BOARD VIDEO BOARD SPEAKER A SPEAKER B J1009A J1010A RS232 BOARD TUNER PRE-OUT BOARDMULTI-CHANNEL J717B J611A J612A J6101B J6101A J719B J6104A J708B J707B J350A J41

23、4B J710B J711B J712B J414A SECONDARY BOARD ISC BOARD J801A J781A J782A J582A J801B J783A1 J511B J704B J3103A S-VIDEO BOARD AMP 2 BOARD (SURROUND AMP.) AMP 1 BOARD (FRONT & CENTER) J612B J502A J503A M506 J511A J581A J781B J503B J611B J801A J901A J753A J754B J751B J504A J501A J757J756 J761_NJ761_L J76

24、0 J758 J759 J203B J803A J3103B J6102B J6103B J6102A J6103A J201 J204A J6106AJ6105A J350B J6106A J6105A J8101A J784A J803B J504B1 J504B3 J582A1 J582A3 J582A5 J501B1 J501B3 J501B5 J582A1 J582A3 J582A5 J701 J782A1 J782A2 J782A3 P4402 J581B THERM SENSNORTHERM SENSNOR TO MAIN BOARD TO MAIN BOARD TO MAIN

25、BOARD TO MAIN BOARD TO MAIN BOARD 82-0426135-01-XX CABLE ASSY 4 WAYS #26 FROM TRANSFORMER UL VERSION : USE J758, J759 CE VERSION : USE J760 MOUNT ON CHASSIS GND 33 34 35 36 32 373839 31 15 30 29 28 27 2625 24 23 19 20 17 16 14 13 1211 10 8 9 21 7 6 5 4 3 2 1 18 22 9 WIRING DIAGRAM PARTS LIST ItemDat

26、abase Part NumberDescriptionRemark 1276-022613-06CABLE ASSY 2 WAYS AWG=26 2.5P UL2468AMP1 BD- L=440mmJ511A 2276-041823-11CABLE ASSY 4 WAYS AWG=18 3.96P UL1007AMP1 BD- L=420mm YB03053103-03AJ581A 3276-062613-22CABLE ASSY 6 WAYS AWG=26 2.5P UL1007AMP1 BD- L=320mm (RoHS)J503A 4276-041823-02CABLE ASSY 4

27、 WAYS AWG=18 3.96P UL1007AMP2 BD- L=200mm REV.B (RoHS)J781B 5276-042613-08CABLE ASSY 4 WAYS AWG26 2.5P UL1533AUDIO BD- L=450MM (ROHS)J3103A 6276-022613-07CABLE ASSY 2 WAYS AWG=26 2.5P UL1533DIGIT BD- L=540mm (ROHS)J1009A 7276-042613-06CABLE ASSY 4 WAYS AWG=26 2.5P UL2468DIGITAL BD- L=540mmJ1010A 827

28、6-011843-01CABLE ASSY 1 WAY AWG18 UL1007 BLACKKEYBOARD- L=100mm W/ RING TERMINAL (RoHS)J201 9276-052613-08CABLE ASSY 5 WAYS AWG26 2.5P UL1007LED BD- L=160mm (RoHS)J204A 10276-011843-03CABLE ASSY 1 WAY AWG=18 UL1007 BLACKMAIN BD- L=360mm W/ RING TERMINALJ701 11276-032613-18CABLE ASSY 3 WAYS AWG=26 2.

29、5P L=110mmMAIN BD- J6106B 12276-032613-19CABLE ASSY 3 WAYS AWG=26 2.5P L=60mmMAIN BD- J6105B 13276-032613-29CABLE ASSY 3 WAYS AWG26X2C UL2547MAIN BD- L=210mm (UL LABEL) (RoHS)J715A 14276-082613-22CABLE ASSY 8 WAYS AWG=26X3CMAIN BD- L=480mm (RoHS)J709A 15276-102613-14CABLE ASSY 10 WAYS AWG26 2.5P UL1

30、007MA BD- L=460mm (UL LABEL)J350B 16276-122613-16CABLE ASSY 12 WAYS AWG26 2.5P UL2468MA BD- L=230mm (UL LABEL) (RoHS)J502B 17276-142613-02CABLE ASSY 14 WAYS #26 2.5P UL1007MA BD- L=540mm (RoHS)J8101B 18276-031823-09CABLE ASSY 3 WAYS AWG=18 3.96P UL1015SPK BD- L=320mmJ782B1, J782B2, J782B3 19276-0318

31、23-11CABLE ASSY 3 WAYS AWG=18 3.96P UL1015SPK BD- L=350mmJ582B1, J582B2, J582B3 20276-051823-07CABLE ASSY 5 WAYS AWG=18 3.96P UL1007SPK BD- L=250mm (V/BL/Y)J801B1, J801B3, J801B5 21276-051823-09CABLE ASSY 5 WAYS AWG=18 3.96P UL1007SPK BD- L=120mm (BR/R/O)J501B1, J501B3, J501B5 22276-031823-16CABLE A

32、SSY 3 WAYS AWG=18 3.96P UL1015SPK BD- L=240mm REV.CJ504B1, J504B3 23276-062613-05CABEL ASSY 6 WAYS AWG=26 2.5PPO BD- UL1533X1C L=350mm (RoHS)J612A 24276-062613-09CABLE ASSY 6 WAYS AWG=26 2.5PPO BD- UL 1533X1C L=540mm REV.BJ611A 10 ItemDatabase Part NumberDescriptionRemark 25276-011643-29CABLE ASSY 1

33、 WAY AWG=16 UL1672PS BD- BROWN L=100mmJ757 26276-011643-69CABLE ASSY 1 WAY AWG=16 UL1672 BLUEPS BD- L=100mmJ756 27276-042613-07CABLE ASSY 4 WAYS AWG26 2.5P UL2468PS BD- L=400mm (ROHS)J753A 28276-021823-01CABLE ASSY 2 WAYS AWG=18 UL1007SE BD- L=170MM D08033504AJ803A 29276-061823-09CABLE ASSY 6 WAYS #

34、18 3.96P UL1007SE BD- L=150MM (RoHS)J801A 30276-082613-20CABLE ASSY 8 WAYS AWG=26 2.5P UL1007SV BD- L=380mm (RoHS)J414A 31276-011843-01CABLE ASSY 1 WAY AWG18 UL1007 BLACKV6 BD- L=100mm W/ RING TERMINAL (RoHS)P4402 32238-030070-20FFC CABLE 30 PINS P1.25 L=70mmJ601C W/SHIELD 33238-172820-03FFC CABLE 1

35、7 PINS P1.25 L=200mmJ720C W/SHIELD 34238-200016-00FFC CABLE 20 PINS P1.25 L=160mmJ604C W/SHIELD 35238-280017-00FFC CABLE 28 PINS P1.25 L=170mmJ602C,J603C W/SHIELD 36238-300222-00FFC CABLE 30 PINS P1.25 L=220mmJ713C,J714C W/SHIELD 37276-011643-23CABLE ASSY 1 WAY AWG=16 UL 10151-CHASSIS GREEN/YELLOW L

36、=100mm (RoHS)GND 38276-011643-29CABLE ASSY 1 WAY AWG=16 UL16721-INLET/ BROWN L=100mmPSU.BD (L), J759 39276-011643-69CABLE ASSY 1 WAY AWG=16 UL1672 BLUE1-INLET/ L=100mmPSU.BD,J758 11 BLOCK DIAGRAM 12 SPECIAL FUNCTION FEATUREKEYS PRESS ON FRONT PANEL RESET FOR AH VERSIONVIDEO 6 +SOURCE UP RESET FOR C

37、VERSIONVIDEO 6 + SOURCE DOWN NTSC / PAL SELECTIONVIDEO + MEMORY VFD ALL DISPLAYAUDIO 6 + TONE DEFEAT AM FREQ. STEPAM/FM + FM MUTE DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING M6759(U202) main clock is at 20MHz(X202) M6759(U201) main clock is at 20MHz(X201) UPPER - +5V supply to KEYBOARD when power

38、 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 43 of CS49326) LRCLK (pin 42 of CS49326) MCLK (pin30 of CS49326) NOTE: The waveforms

39、are based on software version V2.10. 13 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 f

40、or idle current again. 6.Repeat 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

41、 the THD of the SL,SR,BS output. Clipping should occur before full power achieved. 5.Rotate R834 counter-clockwise slowly until the THD just below 0.1%. 6.Repeat step 2-5 for R834 but monitor FL, FR & Center output. 7.The procedure is finish at this step. 8.Load all channels at full power using 1kHz

42、 sine wave with 4 ohm load. 9.The clipping power(at THD 0.1%) should less than 85W. ADJUSTMENT POINT DIAGRAM R522R545R571 P501 P502P503 P803 P802P801 R835R836R897 R881 FRONT / CENTER AMPLIFIER BOARD SURROUND AMPLIFIER BOARD SECONDARY / ISC BOARD 14 PCB LAYOUT AUDIO BOARD POWER SUPPLY (STANDBY) BOARD 15 COMPONENT VIDEO BOARD - COMPONENT SIDE COMPONENT VIDEO BOARD - COPPER SIDE DIGITAL BOARD - COMPONENT SIDE SIDE DIGITAL BOARD - COPPER SIDE 16 DSP BOARD - COPPER SIDE DSP BOARD - COMPONENT SIDE 17 FRONT / CENTER AMPLIFIER BOARD - COMPONENT SIDE 18 FRONT /