NAD-T754-avr-sm 维修电路原理图.pdf

NADSERVICE MANUALT 754T 754Surround Sound ReceiverSurround Sound ReceiverDRAFT DATE: 08 MAY 2007RadioFans.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 REPLACE ONLY WITH SAME TYPE OFFUSE.Reference DesignatorDatabase Part NumberDescriptionF751*AH20-001-0078-90 FUSE TIME-LAG 10A/250VAC 5X20mmUL/CSA 5TF751*C,CT20-001-0069-90 FUSE 800mA 250V TIME LAG LBC5x20mm 5T UL/CSA/VDE/SEMKOF752*AH20-001-0076-90 FUSE 1.6A 250V TIME LAG LBC5x20mm 5T UL/CSA/VDE/SEMKOF752*C,CT20-001-0072-90 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 acceptably 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 ADJUSTMENT . 13PCB LAYOUT . 14 - 29SCHEMATIC DIAGRAM . 30 - 46IC BLOCK DIAGRAM . 47 - 54EXPLODED VIEW. 55EXPLODED VIEW PARTS LIST. 56 - 58ELECTRICAL PARTS LIST . 59 - 73PACKING DIAGRAM . 74Parts marked with the symbol are critical with regard to the risk of fire and electricshock. Replace 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)296 20 mVS/N Ratio(A-wtd, 1kHz, 1 W, 8 ohm, SL/SR/BL) - 75 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 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 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 dBAudio LPF 70 dBA-wtd 70 dBChannel Separation (1 W, 20 kHz LPF)Track 65 997 Hz 60 dBDOLBY PRO LOGIC II SECTIONFrequency 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 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/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 sensitivity(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*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 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=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)6FRONT 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 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 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 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 SWITCHBOARDJ8101BJ713AJ714AJ715AJ719AJ720AJ717AJ710AJ711AJ712AJ707AJ704AJ502BJ709AJ713BJ714BJ203AJ204BJ901BJ753BVIDEO 6 INPUT BOARDJ758BJ757BJ709BDSP BOARDJ604BJ715BJ1009BJ1010BLED BOARDPSU BOARDCOMPONENT VIDEO DIGITAL BOARD AUDIO BOARDVIDEO BOARDSPEAKER A SPEAKER B J1009AJ1010ARS232 BOARDTUNERPRE-OUT BOARDMULTI-CHANNEL J717BJ611AJ612AJ6101BJ6101AJ719BJ6104AJ708BJ707BJ350AJ414BJ710BJ711BJ712BJ414ASECONDARY BOARDISC BOARDJ801AJ781AJ782AJ582AJ801BJ783A1J511BJ704BJ3103AS-VIDEO BOARDAMP 2 BOARD(SURROUND AMP.)AMP 1 BOARD(FRONT & CENTER)J612BJ502AJ503AM506J511AJ581AJ781BJ503BJ611BJ801AJ901AJ753AJ754BJ751BJ504AJ501AJ757J756J761_NJ761_LJ760J758J759J203BJ803AJ3103BJ6102BJ6103BJ6102AJ6103AJ201J204AJ6106AJ6105AJ350BJ6106AJ6105AJ8101AJ784AJ803BJ504B1J504B3J582A1J582A3J582A5J501B1J501B3J501B5J582A1J582A3J582A5J701J782A1J782A2J782A3P4402J581BTHERM SENSNORTHERM SENSNORTO MAIN BOARDTO MAIN BOARDTO MAIN BOARDTO MAIN BOARDTO MAIN BOARD82-0426135-01-XXCABLE ASSY 4 WAYS #26 FROM TRANSFORMERUL VERSION : USE J758, J759CE VERSION : USE J760MOUNT ONCHASSIS GND3334353632373839311530292827262524231920171614131211108921765432118229WIRING DIAGRAM PARTS LISTItemItemDatabase Part NumberDatabase Part NumberDescriptionDescriptionRemarkRemark117-012-2986-90CABLE ASSY 2 WAYS AWG=26 2.5P UL2468L=440mmAMP1 BD-J511A217-012-2987-90CABLE ASSY 4 WAYS AWG=18 3.96P UL1007L=420mmAMP1 BD-J581A317-012-2988-90CABLE ASSY 6 WAYS AWG=26 2.5P UL1007L=320mmAMP1 BD-J503A417-012-2989-90CABLE ASSY 4 WAYS AWG=18 3.96P UL1007L=200mm REV.BAMP2 BD-J781B517-012-2966-90CABLE ASSY 4 WAYS AWG26 2.5P UL1533 L=450MMAUDIO BD-J3103A617-012-2957-90CABLE ASSY 2 WAYS AWG=26 2.5P UL1533L=540mmDIGIT BD-J1009A717-012-2990-90CABLE ASSY 4 WAYS AWG=26 2.5P UL2468L=540mmDIGITAL BD-J1010A817-012-2956-90CABLE ASSY 1 WAY AWG18 UL1007 BLACKL=100mm W/ RING TERMINALKEYBOARD-J201917-012-3404-90CABLE ASSY 5 WAYS AWG26 2.5P UL1007 L=160mmLED BD-J204A1017-012-2991-90CABLE ASSY 1 WAY AWG=18 UL1007 BLACKL=360mm W/ RING TERMINALMAIN BD-J7011117-012-2963-90CABLE ASSY 3 WAYS AWG=26 2.5P L=110mmMAIN BD-J6106B1217-012-2992-90CABLE ASSY 3 WAYS AWG=26 2.5P L=60mmMAIN BD-J6105B1317-012-2964-90CABLE ASSY 3 WAYS AWG26X2C UL2547 L=210mmMAIN BD-J715A1417-012-2974-90CABLE ASSY 8 WAYS AWG=26X3C L=480mmMAIN BD-J709A1517-012-2993-90CABLE ASSY 10 WAYS AWG26 2.5P UL1007 L=460mm MA BD-J350B1617-012-2977-90CABLE ASSY 12 WAYS AWG26 2.5P UL2468 L=230mm MA BD-J502B1717-012-2994-90CABLE ASSY 14 WAYS #26 2.5P UL1007 L=540mmMA BD-J8101B1817-012-2960-90CABLE ASSY 3 WAYS AWG=18 3.96P UL1015L=320mmSPK BD-J782B1, J782B2,J782B31917-012-2995-90CABLE ASSY 3 WAYS AWG=18 3.96P UL1015L=350mmSPK BD-J582B1, J582B2,J582B32017-012-2996-90CABLE ASSY 5 WAYS AWG=18 3.96P UL1007L=250mm (V/BL/Y)SPK BD-J801B1, J801B3,J801B52117-012-2997-90CABLE ASSY 5 WAYS AWG=18 3.96P UL1007L=120mm (BR/R/O)SPK BD-J501B1, J501B3,J501B52217-012-2998-90CABLE ASSY 3 WAYS AWG=18 3.96P UL1015L=240mmSPK BD-J504B1, J504B32317-012-2972-90CABEL ASSY 6 WAYS AWG=26 2.5P UL1533X1CL=350mmPO BD-J612A10ItemItemDatabase Part NumberDatabase Part NumberDescriptionDescriptionRemarkRemark2417-012-2999-90CABLE ASSY 6 WAYS AWG=26 2.5P UL 1533X1CL=540mmPO BD-J611A2517-012-2948-90CABLE ASSY 1 WAY AWG=16 UL1672 BROWNL=100mmPS BD-J7572617-012-2874-90CABLE ASSY 1 WAY AWG=16 UL1672 BLUE L=100mm PS BD-J7562717-012-2965-90CABLE ASSY 4 WAYS AWG26 2.5P UL2468 L=400mmPS BD-J753A2817-012-3000-90CABLE ASSY 2 WAYS AWG=18 UL1007 L=170MMSE BD-J803A2917-012-3001-90CABLE ASSY 6 WAYS #18 3.96P UL1007 L=150MMSE BD-J801A3017-012-2973-90CABLE ASSY 8 WAYS AWG=26 2.5P UL1007L=380mmSV BD-J414A3117-012-2956-90CABLE ASSY 1 WAY AWG18 UL1007 BLACKL=100mm W/ RING TERMINALV6 BD-P44023217-010-0032-90FFC CABLE 30 PINS P1.25 L=70mm W/SHIELD J601C3317-010-0033-90FFC CABLE 17 PINS P1.25 L=200mm W/ SHIELD J720C 3417-010-0038-90FFC CABLE 20 PINS P1.25 L=160mm W/ SHIELDJ604C 3517-010-0039-90FFC CABLE 28 PINS P1.25 L=170mm W/ SHIELDJ602C,J603C3617-010-0040-90FFC CABLE 30 PINS P1.25 L=220mm W/ SHIELDJ713C,J714C3717-012-2875-90CABLE ASSY 1 WAY AWG=16 UL 1015GREEN/YELLOW L=100mm1-CHASSIS GND3817-012-2948-90CABLE ASSY 1 WAY AWG=16 UL1672 BROWNL=100mm1-INLET/PSU.BD (L),J7593917-012-2874-90CABLE ASSY 1 WAY AWG=16 UL1672 BLUE L=100mm1-INLET/PSU.BD,J758 11BLOCK DIAGRAMSELECTORINAUDIOIN/OUTTRIGGERHCF4094MATRIXCDTUNERKEYIRINVOLUMEENCODEV4V6V5V1V2V3INEx SUBV3OUTV4OUTINININEx SURREx CENEx BSURR24C16EEPROMRST ICTCM810MUTEMUTEOUTMS AUDIOAMPPOWERMUTEMUTEMUTEMUTEAMPPOWERPRE-OUTSPKRELAYRELAYOUTSPKOUTSPKRELAYRELAY(A)OUTOUTSPKRELAYOUTSPK(B)M61516VOLUME /SELECTORELECTAUDIOM61516VFDPT6306VFD DRIVERCPUT89C51RD2DATACLKMSRMSLSRSLBSLBSRBSLCFRFLFRCFLBSRFRCBSLFLSRSLBSLFLFRCFRFLSHIFT REGISTERSHCF4094ARRAY OFT89C51RD2CPU74VHC2454051CS49326M61516LC74763CS8415ACS4228CS434074HC(COMPOSITE/S)(COMPONENT)DIRINOUTINTAPEEx FRONTTAPEOPT IN74HC157CCS434096/24D/A96/24CS4228D/ACPU74HC251OUTCOAX INCOAX / OPTCPUCS-8415CSCPUCDOUTRESETCCLKCDINCPUCS-4932674HC574256k x8W27C02EPROMCPUMUTEMUTEINEXT 7.1INVIDEOINVIDEOCPU(COMPONENT)VIDEO OUTMON OUTCPUV4 OUTV3 OUTDSP SECTIONBSRVOLUME /SSRSLFRBSLELECTAUDIOFLSHIFTER74HC245LEVELRE-DIRECTBASSSHIFTERSHIFTER74HC24574HC245DSPRESETCSCDOUTCDINCCLKCPUINTREGLEVELLEVELA17A16A15CPUSRSUBSLSRSLSUB74HC0074HC04V1V274HC4052MULTI-PLEXER75 OHMDRIVERBA7660FSOSDLC74763V3V4V6V5V1V2VIDEOSELECTOR74HC405112SPECIAL FUNCTIONFEATUREKEYS PRESS ON FRONT PANELRESET FOR AH VERSIONVIDEO 6 +SOURCE UPRESET FOR C VERSIONVIDEO 6 + SOURCE DOWNNTSC / PAL SELECTIONVIDEO + MEMORYVFD ALL DISPLAYAUDIO 6 + TONE DEFEATAM FREQ. STEPAM/FM + FM MUTEDETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGINGM6759(U202) main clock is at 20MHz(X202)M6759(U201) main clock is at 20MHz(X201)UPPER - +5V supply to KEYBOARD when power upLOWER - RESET line (TCM810LENB713) whenpower upUPPER - OUTPUT ENABLE(pin 24) of EPROM(W27C02) when changing SURROUND MODESLOWER - CHIP ENABLE(pin 22) of EPROM(W27C02) when changing SURROUND MODESSCLK (pin 43 of CS49326)LRCLK (pin 42 of CS49326)MCLK (pin 30 of CS49326)NOTE: The waveforms are based on software version V2.10.13AMPLIFIER ADJUSTMENTIdle Current1.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.Repeat for other channels.CHANNELJUMPERVRFLP501R522FRP502R545CP503R571SLP801R835SRP802R836BSP803R897ISC Sensitivity1.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 output. Clipping should occur before full powerachieved.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 sine wave with 4 ohm load.9.The clipping power(at THD 0.1%) should less than 85W.ADJUSTMENT POINT DIAGRAMR522R545R571P501P502P503P803P802P801R835R836R897R881FRONT / CENTER AMPLIFIER BOARDSURROUND AMPLIFIER BOARDSECONDARY / ISC BOARD14PCB LAYOUTAUDIO BOARDPOWER SUPPLY (STANDBY) BOARD15COMPONENT VIDEO BOARD - COMPONENT SIDECOMPONENT VIDEO BOARD - COPPER SIDEDIGITAL BOARD - COMPONENT SIDE SIDEDIGITAL BOARD - COPPER SIDE16DSP BOARD - COPPER SIDEDSP BOARD - COMPONENT SIDE17FRONT / CENTER AMPLIFIER BOARD - COMPONENT SIDE18FRONT / CENTER AMPLIFIER BOARD - COPPER SIDE19SURROUND AMPLIFIER BOARD - COMPONENT SIDE20SURROUND AMPLIFIER BOARD - COPPER SIDE21KEY BOARD/POWER SWITCH- COMPONENT SIDEKEY BOARD/POWER SWITCH- COPPER SIDE22MAIN BOARD23MULTI-CHANNEL BOARD - COMPONENT SIDE24MULTI-CHANNEL BOARD - COPPER SIDE25PRE-OUT BOARD - COPPER SIDEPRE-OUT BOARD - COMPONENT SIDE26SPEAKER TERMINAL BOARDPOWER SWITCH / TRIGGER BOARDVIDEO 6 BOARD27SECONDARY / ISC BOARD - COMPONENT SIDESECONDARY / ISC BOARD - COPPER SIDE28S-VIDEO BOARD29COMPOSITE VIDEO BOARD - COMPONENT SIDECOMPOSITE VIDEO BOARD - COPPER SIDE30SCHEMATIC DIAGRAMAUDIO SWITCHRESISTORS : 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%.31COMPONENT VIDEORESISTORS : 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%.32COMPOSITE VIDEORESISTORS : 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%.33E C B2SA10152SC1815E C B2SA1016POWER SUPPLY (SECONDARY)NOTE:1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%.2. COMPONENTS MARKED ARE SAFETY CRITIAL PARTS.34POWER SUPPLY (STAND BY)RESISTORS : F-FUSIBLE, UNLESS OTHERWISE SPECIFIED ARE CARBON FILM.NOTE:1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%.2. COMPONENTS MARKED ARE SAFETY CRITIAL PARTS.35TRIGGERRESISTORS : 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%.36VIDEO 6RESISTORS : UNLESS OTHER