NAD-T162-avr-sm维修电路原理图.pdf

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1、NAD SERVICE MANUALT 762 T 762 AV SURROUND SOUND RECEIVER AV SURROUND SOUND RECEIVER DRAFT DATE: July 08RadioFans.CN 收音机爱 好者资料库 2 SAFETY INFORMATION 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

2、 SAME TYPE OF FUSE. Reference DesignatorPart NumberDescription F751*AH33-0191001-00-88Fuse 10A 250V Time Lag 5x20 MM UL/CSA F751*C33-0181006-00-88Fuse 6.3A 250V Time Lag 5x20 MM UL/CSA/SEMKO/VDE F752*AH33-0111006-00-48Fuse 1.6A 250V Time Lag 5x20 MM UL/CSA/VDE/SEMKO F752*C33-0151006-00-48Fuse 800mA

3、250V Time Lag 5x20 MM 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 acceptably insulated from supply c

4、ircuit. CONTENTS DESCRIPTIONPAGE SPECIFICATIONS . 4 - 5 REAR PANEL / FRONT PANEL VIEW . 6 DISASSEMBLY INSTRUCTIONS . 7 WIRING DIAGRAM . 8 BLOCK DIAGRAM . 9 ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT . 10 PCB LAYOUT .11 - 22 SCHEMATIC DIAGRAM . 23 - 38 IC BLOCK DIAGRAM . 39 - 47 EXPLODED VIEW.

5、48 EXPLODED VIEW PARTS LIST. 49 - 50 ELECTRICAL PARTS LIST . 51 - 65 PACKING DIAGRAM . 66 VERSION HISTORY . 67 VERSION T762i PARTS LIST. 68 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

6、.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(ref. 8 ohms, 1 kHz)220 20 mV S/N Ratio(A-wtd, 1kHz, 1 W, 8 ohm, SL/SR/BL) - 72 dB

7、 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 input, 10 W, 1 kHz) -57 dB Controls Bass(at 500 mV in, 1 W out, 100 Hz) 10 dB 2

8、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 Track 44 200 - 20 kHz 0.8 dB Harmonic Distortion(1 W, Audio LPF, Dolby Congfig 1

9、)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 dB 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 Freque

10、ncy 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 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

11、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 % RadioFans.CN 收音机爱 好者资料库 5 DTS SECTION Output Level (Vol 0 dB): FL/FR/C/SL/SRTrack 61 kHz0.5 2.0 W Channel Difference (FL ref): FL/FR/C/SL/SRTrack 61 kHz 1.0 dB Harmonic Distort

12、ion (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 1510.5 1.5 dB AM TUNER SECTION Input level is expressed as the reading in open circuit of 75-ohm source impedance

13、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 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

14、- 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 dBV 15 dBuv 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.

15、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. AM) 48 dB 48 dB Image Rejection(119.4 MHz) 65 dB I.F. Rejection(10.7 MHz) 78 dB

16、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 SPECIFICATIONS Dimensions (Width x Height x Depth)435 x 167 x 382 mm Net Weight18.

17、50 Kg (40.70 lbs) Shipping Weight22.20 Kg (48.84 lbs) RadioFans.CN 收音机爱 好者资料库 6 123456789 2120111912131415161718 10 FRONT PANEL REAR PANEL / FRONT PANEL VIEW 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 I

18、NPUT 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.SWITCHED AC OUTLETS 13.AC POWER INLET 14.SPEAKERS A & B 15.DVD, SAT, VCR, VIDEO 4 & VIDEO 5 16.TAPE INPUT & OUTPUT 17.DISC INPUT 18.7.1 CH. INPU

19、TS 1.POWER 2.STAND-BY 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.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 INP

20、UT 21.PHONES RadioFans.CN 收音机爱 好者资料库 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. 1 4 5 6 7 8 9 10 2 3 2.Pull both sides of the TOP COVER slightly outwards 11 and tilt

21、 approx. 35 and then remove in the direction as indicated by the arrow 12. Refer to Figure No. 2. Figure No. 1 12 11 11 Figure No. 2 RadioFans.CN 收音机爱 好者资料库 8 THERM SENSNORUL VERSION : USE J758, J759 CE VERSION : USE J760 MOUNT ON CHASSIS GND 82-0326135-07-98 CABLE ASSY 3 WAYS #26 UL2877 L=150 36-28

22、28201-71-XX FFC CABLE 28 PINS P1.25 L=200mm 36-2828201-71-XX FFC CABLE 28 PINS P1.25 L=200mm CABLE ASSY 2 WAYS 2.5P UL1533 L=540mm 82-0426135-03-XX CABLE ASSY 4 WAYS 2.5P UL2468 L=540mm 36-1728201-71-XX FFC CABLE 17 PINS P1.25 L=200mm 36-2028121-71-XX FFC CABLE 20 PINS P1.25 L=120mm 82-1226135-05-XX

23、 CABLE ASSY 12 WAYS #26 UL2877 L=50mm 82-1026135-01-XX CABLE ASSY 10 WAYS #26 2.5P UL2877 L=540mm TO MAIN BOARD 82-0826135-04-XX CABLE ASSY 8 WAYS #26 2.5P TO MAIN BOARD TO MAIN BOARD 82-0426135-01-XX CABLE ASSY 4 WAYS #26 2.5P UL2877 L=500mm 82-0626135-03-XX CABLE ASSY 6 WAYS #26 UL2877 L=480mm 82-

24、0826135-03-XX CABLE ASSY 8 WAYS #26 UL2877 L=450mm 82-0326135-08-XX CABLE ASSY 3 WAYS #26 UL2854 L=300mm 82-0116435-02-XX CABLE ASSY 1 WAYS #16 UL1672 BROWN L=400mm 82-0116435-03-XX CABLE ASSY 1 WAYS #16 UL1672 BLUE L=400mm 82-1226135-00-XX CABLE ASSY 12 WAYS #26 2.5P UL2877 L=240mm 82-0326135-04-XX

25、 CABLE ASSY 3 WAYS #26 2.5P UL2877 L=400mm FROM TRANSFORMER 82-0626135-02-XX CABLE ASSY 6 WAYS #26 2.5P UL1533 L=350mm 82-0626135-04-XX CABLE ASSY 6 WAYS #26 2.5P UL1533 L=540mm 82-0818235-01-XX CABLE ASSY 8 WAYS #18 3.96P UL1672 L=150mm 82-1426135-00-XX 2.5P UL2877 L=420mm 82-0318235-01-XX CABLE AS

26、SY 3 WAYS #18 3.96P UL1015 L=240mm 82-0518235-05-XX, CABLE ASSY 5 (R/BR/O) 82-0518235-04-XX, CABLE ASSY 5 WAYS #18 3.96P UL1007 L=250mm (V/BL/Y) 82-0626135-05-XX CABLE ASSY 6 WAYS #26 2.5P UL2877 L=120mm 82-0418235-01-XX CABLE ASSY 4 WAYS #18 3.96P UL1007 L=280mm 82-0418235-00-XX CABLE ASSY 4 WAYS #

27、18 3.96P UL1007 L=120mm 82-0318235-05-XX CABLE ASSY 3 WAYS #18 3.96P UL1015 L=320mm 82-0426135-00-XX CABLE ASSY 4 WAYS #26 2.5P UL2877 L=200mm 82-1226135-04-XX CABLE ASSY 12 WAYS #26 2.5P UL1533x1C L=200mm82-0116436-12-XX CABLE ASSY 1 WAYS #16 UL1672 BLUE L=100mm 82-0116438-03-XX CABLE ASSY 1 WAYS #

28、16 UL1672 BROWN L=100mm B B 82-0226135-02-XX #26 2.5P UL2468 L=340mm 82-0226135-03-XX CABLE ASSY 2 WAYS #26 2.5P UL2468 L=440mm B B B B C C C 82-0418235-02-XX, CABLE ASSY 4 WAYS #18 3.96P UL1672 L=150mm C C C C C C C C C 82-0318235-06-XX CABLE ASSY 3 WAYS #18 3.96P UL1015 L=350mm C C C C C C KEYBOAR

29、D MAIN BOARD BOARD J715A J719A J718A J720A 3A J717A J708A J502B J721A J709A J203 J204B J350B J901B BOARD DSP BOARD J604B J715B J1009B J1010B LED BOARD PSU BOARD COMPONENT VIDEO BOARD DIGITAL BOARD AUDIO BOARD VIDEO BOARD SPEAKER A BOARD SPEAKER BOARD TUNER PRE-OUT BOARDMULTI-CHANNEL BOARD J611A J615

30、B J614B J706A J614A J615A J719B J718B J712B J414A ISC BOARD J802AJ801AJ581A J782A J582A J811B J705B S-VIDEO BOARD AMP 2 BOARDAMP 1 BOARD M506 J505A J781B J503B J901A J753A J754B J751B J504A J501A J757J756 61_L J760 J803A2J803A1 WIRING DIAGRAM J713B J714B RadioFans.CN 收音机爱 好者资料库 9 OSD LC74763 Pin 14

31、A C Out Speaker Output Output Speaker Pin ( ST/MO, Mute, S Meter ) CE/Data/Clk, RDSbus VFD Driver CPU Stereo mode AC3 mode Multi Ch in by CPU control 4966 VFD by CPU 4966 control Speaker Output AUDIO MS 4966 control by CPU control by CPU 4966 MS VIDEO OUT CD V1 V2 V3 V3 V4 V4 V5 TC9273N D/A CS-49326

32、 DSP EPROM FL Config Selector FR LR SL SR BSL BSR FL FR SELECTOR VOLUME M62446 ELECT TREBLE BASS MUTE MUTE MUTE MUTE MULTI-CH OUT FL FR C POWER AMP AMP POWER SL SR CS5331 DIR CS-8415 COAXIAL 1 COAXIAL 2 COAXIAL 3 A/D 74LS157 LR PROTECT CPU Stand-by CPUCPU OUT CPU CPU CPU TC-9164AN CPU SL FRONT 1 2 3

33、 4 BSL BSR FR FL MULTI-CH IN CPU CPU CPU CPU TUNER OUT Digital/ Analog selector SCSRSL Video Selector BA-7625 FL FR Relay Relay Relay SL SR C Encoder Volume Sensor Remote Key Matrix Board Tuner LED Supply Power Relay AC Input Main Stand-by Power Supply +5V CPU AC Input CPU LA1837 + LC72131 + BU1924

34、LR FL FR CS4340 D/AD/A Bass Re-direct CPU CS RESET ABOOT DATA OUT CLOCK OUT A16 A17 CLOCK OUT DATA OUT M27C020 C B F0 F1 F2 E0 E2 AT24C02 EEPRO -004 TAPE IN CS4340 TAPE OUT 96/2496/2496/24 OPTICAL V6 SR BSL BSR ELECT M62446 VOLUME MUTE CPU SUB 3 CPU 2 C MUTE Relay CPU POWER AMP BSL BSRBSL 96/24 CS43

35、40 D/A IR In/Out CPU LC4966 74HC153 OPTICAL OUT COAXIAL OUT CPU ON LED Protect LED LC4966 Power-Down Detect MUTE CPU BSRBSL BSL Head phone control to CPU force 2 channel L-CH MS LINE-AMP MS LINE-AMP R-CH MSL MSR V3 V4 V6 CD V5 TUNER CPU OUT IN TAPE TAPE V3 V4 OUT V1 V2 OUT TC9273N -004 MSLMSR Select

36、or LC4966 BA-7625 Video L-CH R-CH BLOCK DIAGRAM U202 VFD U201 A/V-R RadioFans.CN 收音机爱 好者资料库 10 AMPLIFIER ADJ USTMENT 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 vol

37、tmeter. 5.Leave power on for at least 5 min, and check for idle current again. 6.Repeat for other channels. CHANNELJUMPERVR FLP503R571 FRP502R545 CP501R522 SLP801R835 SRP802R836 BSP803R897 ISC Sensitivity 1.Connect 8 ohm loading to all channels. 2.Rotate R881 fully clockwise. 3.Load all channels at

38、full power using 1kHz sine wave. 4.At this time, monitor 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

39、 this step. 8.Load all channels at full power using 1kHz sine wave with 4 ohm load. 9.The clipping power(at THD 0.1%) should less than 85W. ADJ USTMENT POINT DIAGRAM R522R545R571 P501P502 P503 R835 P801 R836R897 P803 P802 R834 FRONT/CENTER AMPLIFIER BOARD SURROUND AMPLIFIER BOARD ISC BOARD RadioFans

40、.CN 收音机爱 好者资料库 11 PCB LAYOUT AUDIO BOARD - COMPONENT SIDE AUDIO BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 12 COMPONENT VIDEO BOARD - COMPONENT SIDE COMPONENT VIDEO BOARD - COPPER SIDE DIGITAL BOARD - COMPONENT SIDE SIDE DIGITAL BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 13 DSP BOARD - COPPER SIDE

41、 NLA DSP BOARD - COMPONENT SIDE NLA RadioFans.CN 收音机爱 好者资料库 14 FRONT/CENTER AMPLIFIER BOARD RadioFans.CN 收音机爱 好者资料库 15 SURROUND AMPLIFIER BOARD RadioFans.CN 收音机爱 好者资料库 16 KEY BOARD/POWER SWITCH - COMPONENT SIDE KEY BOARD/POWER SWITCH - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 17 MAIN BOARD RadioFans.CN 收

42、音机爱 好者资料库 18 MULTI-CHANNEL BOARD - COMPONENT SIDE MULTI-CHANNEL BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 19 POWER SUPPLY (STANDBY) / LED BOARD ISC BOARD - COMPONENT SIDE ISC BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 20 PRE-OUT BOARD - COPPER SIDE PRE-OUT BOARD - COMPONENT SIDE RS-232 BOARD - CO

43、PPER SIDE- COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 21 SPEAKER TERMINAL BOARD TRIGGER BOARD VIDEO 6 BOARD SECONDARY BOARD RadioFans.CN 收音机爱 好者资料库 22 S-VIDEO BOARD COMPOSITE VIDEO BOARD RadioFans.CN 收音机爱 好者资料库 23 DTA144ESA DTC144ESA E C B SCHEMATIC DIAGRAM AUDIO SWITCH RESISTORS : UNLESS OTHERWISE SPECIFIED ARE CARBON FILM. NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%. RadioFans.CN 收音机爱 好