NAD-T755-avr-sm 维修电路原理图.pdf

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1、NADSERVICE MANUALT 755T 755Surround Sound Receiver Surround Sound ReceiverDRAFT DATE: AUGUST 2009RadioFans.CN 收音机爱 好者资料库2SAFETY INFORMATIONManufactured under license under U.S. Patent #s: 5,451,942; 5,956,674; 5,974,380; 5,978,762; 6,226,616; 6,487,535; 7,003,467; 7,212,872 & other U.S. and worldwid

2、e patents issued & pending. DTS is a registered trademark & the DTS logos and Symbol are trademarks of DTS, Inc. 1996-2007 DTS, Inc. All Rights Reserved.NAD ELECTRONICS INTERNATIONAL633 GRANITE COURT, PICKERING,ON, CANADA L1W 3K1MODEL T755 AV SURROUND SOUND RECEIVERPOWER RATING 120V60Hz 6ADESIGNED &

3、 ENGINEERED IN CANADA, CUSTOMMANUFACTURED TO NAD SPECIFICATIONS IN CHINAMODEL T755 AV SURROUND SOUND RECEIVERNAD ELECTRONICS INTERNATIONALPOWER RATING 230V50Hz 3ADESIGNED & ENGINEERED IN CANADA, CUSTOMMANUFACTURED TO NAD SPECIFICATIONS IN CHINARadioFans.CN 收音机爱 好者资料库3SERVICE SAFETY PRECAUTIONS1. Rep

4、lacing the fusesCAUTION:FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE.Reference Designator Database Part Number DescriptionF8001*AH 20-001-0072-90 FUSE TIME-LAG 6.3A 250VAC 5X20mm TSD UL/CSA/VDE/CCC WALTER F8001*C,CT 20-001-0072-90 FUSE TIME-LAG 6.3A 250VAC 5X

5、20mm TSD UL/CSA/VDE/CCC WALTERF8002*AH 20-001-0076-90 FUSE 1.6A 250V TIME LAG LBC 5X20mm TSD UL/CSA/VDE/SEMKO F8002*C,CT 20-001-0069-90 FUSE TIME-LAG 800mA 250V 5x20mm TSD UL/CSA/VDE/CCC WALTER 5X20mm VDE/UL/CSA 5T NOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY.2. Safety check out(Only U.S.

6、A. model)Parts marked with the symbol are critical with regard to the risk of fire and electric shock. CONTENTSDESCRIPTION PAGESPECIFICATIONS .4 - 5REAR PANEL / FRONT PANEL VIEW .6DISASSEMBLY INSTRUCTIONS .7WIRING DIAGRAM .8 - 9BLOCK DIAGRAM.10SPECIAL FUNCTION .11DETAILS & WAVEFORMS ON SYSTEM & TEST

7、 & DEBUGGING.11-12 ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT .13PCB LAYOUT .14- 28SCHEMATIC DIAGRAM .29-47ELECTRICAL PARTS LIST .48-67IC BLOCK DIAGRAM .68-86EXPLODED VIEW .87-88EXPLODED VIEW PARTS LIST .89-91SINGLE AMPLIFIER CHANNEL REPAIR KIT .92-93 PACKING DIAGRAM .944SPECIFICATIONSPOWER AM

8、PLIFIER 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) 0.1 %Input Sensitivity (ref. 8 ohms, 1 kHz) 1 0.1 VS/N Ratio (A-wtd, 1kHz, 1 W, 8 ohm, FL/C/FR/SL/SR) - 80 dBFrequency Response (20 Hz - 20 kHz) 0 1

9、.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, 1 W, 1 kHz) -54 dBControlsBass (at 500 mV in, 1 W out, 100 Hz) 10 dB 2 dBTreble (at 500 mV in, 1 W out, 10 kHz) 1

10、0 dB 2 dBDOLBY DIGITAL SECTIONChannel Difference (FL ref. Track 30) 1.2 dBFrequency Resporse at Dolby config.2 SL 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 dBHarmonic Distortion (1 W, Audio LPF, Dolby Congfig 1) FL Track 65 997 Hz 0.08 % FR Track 67 997

11、 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 64 dB A-wtd 68 dBChannel Separation (1 W, 20 kHz LPF) Track 65 997 Hz 55 dBDOLBY PRO LOGIC II SECTIONFrequency ResporseI/P mode : L, R : 1 V in, 1 W,

12、 Ch L/R 40 Hz 0 2.0 dB 20 Hz 0 2.0 dBI/P mode : L=R : 1 V in, 1 W, Ch /L/R 40 Hz 0 2.0 dB Ch C 20 kHz 0 2.0 dBI/P mode : L=-R : 1 V in, 1 W, Ch SL/SR 40 Hz 0 2.0 dB 20 kHz 0 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 60 dBI/P mode : L=R : 1 kHz, Ch C 60

13、 dBI/P mode : L=-R : 1 kHz, Ch SL/SR 60 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 6 1 kHz 0.5 -0.2/+0.8 WChannel Difference (FL ref) : FL/FR/C/SL/SR Track 6 1 kHz 0 1.0 dBHarmonic Distortion (Audio Filter) : FL/FR/C/SL/SR Track 10-14 1

14、 kHz 0.08 %Frequency Response (20 Hz to 20 kHz) Track 26-30 +2/-1.5 dBSubwoofer Output Level 1 kHz ref at pre-out (FL) Play Track 10, charge to 15 12.5 1.5 dBAM TUNER SECTIONInput level is expressed as the reading in open circuitof 75-ohm source impedance signal generatorUsable sensitivity (999/1000

15、 kHz) 60 dBVS/N Ratio (5 mV in) 38 dBTHD (5 mV in) 3 %IF Rejection (450 kHz) 36 dBImage Rejection (F+2xIF) 28 dBSelectivity 17 dBOutput 170 -20/+30 mVLoop sensitivity (20 dB S/N) 999/1000 kHz 66 dB 603/600 kHz 66 dB 1404/1400 kHz 66 dBFrequency Response (100 - 2.3 kHz, 5 mV) 6 dBFM TUNER SECTION *C

16、*AHInput level is expressed as the reading in open circuitof 75-ohm source impedance signal generatorUsable sensitivity (98 MHz) 15 dB 15 dBvS/N Ratio (60 dB, IHF wtd) Mono 60 dB 60 dB Stereo 63 dB 63 dBFrequency Response (20 Hz - 15 kHz, 60 dB) 0 1.5 dB 0 1.5 dBChannel Separation (60 dB) 100 Hz 30

17、dB 30 dB 1 k 32 dB 32 dB 10 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) 50 dB 50 dBTHD

18、(60 dB, L=R 75 kHz for AH, 40 kHz Dev for C) Mono 0.5 % 0.5 % Stereo 0.5 % 0.5 %Auto-Search Sensitivity On 24 dB 24 dB Off 15 dB 15 dBRDS decode Sensitivity 26 dB PHYSICAL SPECIFICATIONSDimensions (Width x Height x Depth) 435 x 160 x 393 mmNet Weight 17.9 Kg (39.38 lbs)Shipping Weight 22.7 Kg (49.94

19、 lbs)6FRONT PANELREAR PANEL / FRONT PANEL VIEWREAR PANEL1. IR IN/OUT2. +12V TRIGGER OUT3. SOFT CLIPPING4. FM,AM ANTENNA INPUT5. XM MODULE INPUT(AH) DAB MODULE INOUT(C,CT)6. MP DOCK1. POWER BUTTON2. STANDBY LED3. INFO4. AM/FM/DB5. TUNER MODE6. MEMORY7. NAVIGATION AND ENTER BUTTON8. VACUUM FLUORESCENT

20、 DISPLAY(VFD)9. REMOTE SENSOR10. VOLUME11. SPEAKERS A, B12. SOURCE13. LISTENING MODE14. TONE CONTROLS15. TONE DEFEAT16. FRONT INPUT/MP17. PHONES18. FRONT INPUT JACKS19. MC/MIC INPUTS7. RS-2328. COMPONENT IN/OUT9. AUDIO/VIDEO 16 IN10. AUDIO/VIDEO 3/4 OUT11. MONITOR(S-VIDEO,VIDEO)12. ZONE 213. 7.1 CH

21、INPUT14. AUDIO PREOUT15. DIGITAL AUDIO IN/OUT16. HDMI17. SPEAKERS A, SPEAKER B18. AC POWER INLET19. SWITCHED AC OUTLET20. POWER7DISASSEMBLY INSTRUCTIONS1. Remove machine screws M4.0 x 8.0 (x 6pcs) from the side panels. Remove tapping screw 3.0 x 8.0 (x 4pcs) from the back panel. Refer to Figure No.

22、1. 2. Pull both sides of the TOP COVER slightly outwards and tilt approx. 35 and then remove in the direction as indicated. Refer to Figure No. 2. Figure No. 1Figure No. 28WIRING DIAGRAM9WIRING DIAGRAM PARTS LISTItem Database Part Number Description Remark 1 17-012-3379-90 CABLE ASSY 2 WAYS AWG18 3.

23、96P UL1007 MAIN BD- L=250mm(RoHS) J7004A2 17-012-3380-90 CABLE ASSY 3 WAYS AWG18 3.96P UL1007 MAIN BD- L=250mm(RoHS) J7005A3 17-012-3382-90 CABLE ASSY 10 WAYS AWG26 2.5P UL1533 MAIN BD- L=300mm(RoHS) J6005A4 17-012-3575-90 CABLE ASSY 5 WAYS AWG18 3.96P UL1007 MAIN BD- L=230mm (RoHS) J7003A 5 17-012-

24、3579-90 CABLE ASSY 6 WAYS AWG26 2.5P UL1533 MAIN BD- L=80mm (RoHS) J2006A6 17-012-3974-90 CABLE ASSY 10WAYS AWG#26 2.5P UL1007 MAIN BD- L=110mm BOTH SIDE SOLDER (RoHS) J6010A/B7 17-012-4274-90 CABLE ASSY 12 WAYS AWG26 2.5P UL1533 MAIN BD- 2.5P L=350mm (RoHS) J4002A8 17-012-4275-90 CABLE ASSY 8 WAYS

25、AWG26 UL1533 2.5P MAIN BD- L=140mm (RoHS) J2009A9 17-012-3571-90 CABLE ASSY 4 WAYS AWG26 2.5P L=120mm PSU BD- (RoHS) J2008B10 17-012-3943-90 CABLE ASSY 1 WAY AWG16 UL1672 BLUE PSU BD- L=140mm FASTON 4.8mm (RoHS) J801111 17-012-3944-90 CABLE ASSY 1 WAY AWG16 UL1672 BROWN PSU BD- L=140mm FASTON 4.8mm

26、(RoHS) J801212 17-012-3578-90 CABLE ASSY 3 WAYS AWG18 3.96P UL1007 SURR AMP BD- L=120mm (RoHS) J5003B13 17-012-2956-90 CABLE ASSY 1 WAY AWG18 UL1007 BLACK DSP BD- L=100mm W/ RING TERMINAL J6010A14 17-012-3971-90 CABLE ASSY 20 WAYS AWG28 UL2651 L=120mm KEY BD- PCB MOUNT (RoHS) J2002B15 17-012-2956-90

27、 CABLE ASSY 1 WAY AWG18 UL1007 BLACK SPK BD- L=100mm W/ RING TERMINAL J800116 17-012-3383-90 CABLE ASSY 5 WAYS AWG=18 3.96P UL1007 SPK BD- L=350mm(V/B/Y/O/R)(RoHS) J700617 17-012-3576-90 CABLE ASSY 3 WAYS AWG18 3.96P UL1007 SPK BD- L=420mm (RoHS) J560218 17-012-3577-90 CABLE ASSY 5 WAYS AWG18 3.96P

28、UL1007 SPK BD- L=340/380/400mm (RoHS) J530419 17-012-3385-90 CABLE ASSY 26 WAYS AWG28 UL2651 L=150mm TRIGGER BD- PCB MOUNT(RoHS) J2007B20 17-012-4276-90 CABLE ASSY 20 WAYS AWG28 UL2651 L=200mm COMP.VID. BD- PCB MOUNT (RoHS) J4001B21 17-012-3168-90 CABLE ASSY 10 WAYS AWG26 UL1007 2.5P HDMI BD- L=160m

29、m (RoHS) J4306A22 17-012-2956-90 CABLE ASSY 1 WAY AWG18 UL1007 BLACK FRONT INPUT L=100mm W/ RING TERMINAL BD-J930123 17-012-2874-90 Cable assy 1 way AWG=16 UL 1672 blue L=100mm J8017,J8019 (RoHS) 24 17-012-2875-90 CABLE ASSY 1 WAY AWG16 UL 1015 CHASSIS GND, GREEN/YELLOW L=100mm (RoHS) AC OUTLET GND2

30、5 17-012-3572-90 CABLE ASSY 20 WAYS AWG28 UL2651 L=80mm J2005C (RoHS) 26 17-012-3573-90 CABLE ASSY 20 WAYS AWG28 UL2651 L=130mm J2001C (RoHS) 27 17-012-3948-90 CABLE ASSY 1 WAY AWG16 UL1672 BROWN J8016,J8018 L=100mm (RoHS) 28 17-010-0165-90 FFC CABLE 17 PINS P1.25 L=80MM (RoHS) J6003C10BLOCK DIAGRAM

31、11SPECIAL FUNCTIONFunction Keys NotesFactory Reset AH Source Down + Front/MP Factory Reset C Source UP + Front/MP Toggle IR Channel Source Down + Power Check MCU & DSP Version Source Down + Source UP Check Current Video Mode Source Down + Tone Controls MIC Test Source Down + Tone Defeat VFD Test Sou

32、rce Down + INFO PAL/NTSC Source Down + Memory DAB/XM Source Down + Tuner Band Must cycle power before change takes effect.9k/10k Source UP + Tuner Band Must reselect AM before change takes effect.XM 1kHz Test Tone Tuner Band + Tuner Mode XM must be selected first.XM Signal Strength Tuner Mode for 0.

33、5 seconds XM must be selected first.XM Diagnostics Mode Tuner Mode for 3 seconds XM must be selected first.Check DAB Module Version Tuner Mode for 3 seconds DAB must be selected first.Enter Diagnostics Mode Source Down + EnterDiagnostic Mode Down Source Down + Cursor RightDiagnostic Mode Up Source D

34、own + Cursor LeftPower Off All Zones Power Toggle or Power Off for 3 secondsDETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGINGU1001 Pin 17 - X1001C output, 24.576MHzU1001 Pin 2 - Master clock (Analog), 12.288MHzU1001 Pin 70 - Clock for external memory, 100MHzU1001 Pin 2 - Master clock (PCM), 11.2896MHzU

35、1001 Pin 12 - Left/Right clock (Analog), 48kHzU1001 Pin 12 - Left/Right clock (PCM), 44.1kHz12U1001 Pin 9 - Serial clock (Analog), 3.072MHzU1001 Pin 9 - Serial clock (PCM), 2.8224MHzU2001 Pin 12 - X2001A output, 20.000MHzU4520 Pin 7 - X4503 output, 13.500MHzU4507 Pin 75 - X4501 output, 14.31818MHz13

36、AMPLIFIER ADJUSTMENTIdle Current1. Rotate R5018 fully anti-clockwise.2. Connect DC millivoltmeter to P5001.3. Turn on the unit.4. Adjust R5018 for 2mV +/- 0.2mV reading on voltmeter.5. Leave power on for at least 5 min, and check for idle current again.6. Repeat for other channels.CHANNEL JUMPER VRF

37、L P5001 R5018FR P5101 R5118C P5201 R5218SL P5401 R5418SR P5501 R5518ISC AdjustmentA. Rotate R5634 fully clockwise.B. Use 500mV, 1kHZ sine wave, EXT7.1 input, 8ohm loading to all channels.C. Increase the output power of each channels to 80W(25.3V).D. Note the THD readings should be larger than 0.2%.E

38、. Rotate R5624 anti-clockwise slowly until the THD readings is below 0.1%.ADJUSTMENT POINT DIAGRAMLEFT/RIGHT CHANNEL AMPLIFIER BOARD14PCB LAYOUTPOWER AMPLIFIERFRONT AMP BOARD-COPPER SIDE15FRONT AMP BOARD-COMPONENT SIDE16SURROUND AMP BOARD-COPPER SIDE17SURROUND AMP BOARD-COMPONENT SIDE18DSP BOARD - C

39、OPPER SIDE19DSP BOARD - COMPONENT SIDE20KEY BOARD - COMPONENT SIDEKEY BOARD - COPPER SIDE21F-VIDEO BOARD - COPPER SIDEF-VIDEO BOARD - COMPONENT SIDE22MAIN BOARD -COMPONENT SIDE23MAIN BOARD -COPPER SIDE24TRIGGER BOARD - COMPONENT SIDETRIGGER BOARD - COPPER SIDESPEAKER BOARD - COMPONENT SIDE25COMPONEN

40、T BOARD-COMPONENT SIDECOMPONENT BOARD-COPPER SIDE26HDMI BOARD-COPPER SIDE27HDMI BOARD-COMPONENT SIDE28PSU-STD BOARD-COMPONENT SIDECONNECTOR-3 BOARD-COMPONENT SIDE29SCHEMATIC DAIGRAMCONNECTOR-312345678910111213141516171819202122232425262728J5801Bto AMP-L (J5801A)12345678910111213141516171819202122232

41、425262728J5401Bto AMP-R (J5401A)PO_FLI_GNDPO_SLPO_BSLI_GNDI_GNDISC_SEN_RRELAY_BRELAY_FSC_2SC_1THM_PROISC_THM_RI_DETV_DETOVLD_PROFAN_SEN+15VRELAY_SRELAY_SBRELAY_C4094_CLK4094_DATA4094(1)_STB+5V_KDGNDPO_FLI_GNDPO_SLI_GNDPO_BSLI_GNDISC_SEN_RRELAY_BRELAY_FSC_2SC_1THM_PROISC_THM_RI_DETV_DETOVLD_PROFAN_SE

42、N+15VRELAY_SRELAY_SBRELAY_C4094_CLK4094_DATA4094(1)_STB+5V_KDGND+12V_D+12V_D30POWER SUPPLY(STAND BY)POWER TRANSFORMERTO POWER SWITCHBLK/BLUWHT/BWN(120V only)(UL Version - 1.6A/250V)(CE Version - 800mA/250V)230V120VAC Outlet (UL Version)CE Version - 6.3A/250VUL Version - 6.3A/250VD80011N4007D80031N40

43、07C80030.022u50VC80024.7u25VR800110kR80053M91/2WM8002-AM8002-BD80041N4007D80061N4007D80051N4007R80030.22 1/2W(FUSIBLE)C80060.01u250VF800112345TO SUR AMPM8001To Transformer Thermostat123456T8001TO5382BM8003AC Outlet (CE Version)F8002R800247kC80011000p(MPF)Q80012SC1815YD80021N4007C8004N.I.R8004N.I.C80

44、05N.I.JP8002JP8001J8014J8016J8017123J8001AConnector 3 Pin (2 wires)J8018LIVEJ8019NEUTRALJ8011J801212345678910TO MAIN BOARDDGNDCHGNDCHGND+13VPOWER_ON+12.3VDGND31CENTER SPKWEAK GROUND CONNECTIONFRONT RIGHT SPK_AFRONT LEFT SPK_ASURR LEFT SPKSURR RIGHT SPKWEAK GROUND CONNECTIONFRONT RIGHT SPK_BFRONT LEF

45、T SPK_BC5613300pJ5304B1FRONT J5304A pin 1J5304B2FRONT J5304A pin 2J5304B3FRONT J5304A pin 3J7006B1MAIN J7006A pin 1J7006B2MAIN J7006A pin 2J7006B3MAIN J7006A pin 3C5623300pC5633300pJ5602B3SURROUND J5602A pin 3J5602B1SURROUND J5602A pin 1J7006B4MAIN J7006A pin 4C8253300pC8263300pJ5602B2SURROUND J5602

46、A pin 2C5683300pJ5304B4FRONT J5304A pin 4J5304B5FRONT J5304A pin 5C5693300p12M5102-A34M5102-B12M5101-A34M5101-B12M8101-A34M8101-B56M8101-CJ7006B5MAIN J7006A pin 5J8001TO PSU BOARDSPEAKER32VIDEO 6OPTICAL INPUTMIC/MP3 INVIDEO 6S-VIDEO INPUTVIDEO 6VIDEO 6VIDEO 6HEADPHONECOMPOSITE INPUTR(MONO) INPUTL IN

47、PUTMIC_BIAS:H: MP3L: MICR930475C93052.2uF50VCGGYGYC35241M9304R930375R930275C93042.2uF 50VC93032.2uF50V12M9305123M9307123M9306R93080R93050R9309N.I.R9306N.I.C9308100pC9306100pC930922uF 16VC930722uF 16VR931033kR930733k1235M9308C9310N.I.C9311N.I.R93014.7C93022.2uF50V123M9301C93010.1uFR93204.7kR93234.7kC

48、93160.1uFC93170.1uFR931910kR9325100kC931522uF 16VR9322470Q93032SC4695R9324100kQ93042SC4695R9321470R9318300Q9302DTA114EKAC9313220p3+2-1U9301-ANJM5532MC93142.2uF 50VR931743kR93142.2KR93162.2kECBQ9301DTA114EKAR931133KR9312N.I.R931318k84U9301-CNJM5532MR932610KECBQ93052SC4695R93274.7kR93280R93290C9319100

49、pC9318100pC932122uF 16VC932022uF 16VR933033kR933133k1234567891011121314151617181920J2005BTo MAIN J2005A123M9302J-TR-ST03007C932233pC93230.1uFC93240.1uFR93331kC93251uR933233KR9334N.I.R9335N.I.123456J2006BTo MAIN J2006AC93260.01u12345678J2009BTO MAIN J2009AR9336N.I.D93015.1V1/2WR93371KJ9301TO MAIN BOA

50、RD G7002AGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDDGNDAGNDAGNDDGND+5V_V6AGNDDGNDAGNDAGNDAGND-12V+5V_V6+5V_V6AGND+12V-12VAGND+12V-12V+5V_V6V6_OPT+5V_V6V6_YV6_CV6_VHP_DETMIC_BIAS+12V-12VAGNDAGNDAGNDMP3_LAGNDMP3_RAGNDMICAGNDAGNDDGNDAGNDV6_RV6_LHP_RHP_LAGNDV6_RV6_LHP_RHP_LAGNDAGNDAGNDAGND+12VF-VIDEO33DSP-1AUDIO 4