NAD-T775-avr-sm 维修电路原理图.pdf

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1、NADSERVICE MANUALT 775T 775Surround 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.RadioFans.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

3、 SAME TYPE OF FUSE.Reference Designator Database Part Number DescriptionF8001*AH 20-001-0078-90 FUSE TIME-LAG 10A/250VAC 5X20mm UL/CSA 5TF8001*C,CT 20-001-0072-90 FUSE TIME-LAG 6.3A 250VAC 5X20mm TSD UL/CSA/VDE/CCC WALTERF8002*AH 20-001-0076-90 FUSE 1.6A 250V TIME LAG LBC 5x20mm TSD UL/CSA/VDE/SEMKO

4、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.A. model)Before returning the product to the customer, make leakage current or resistance measurements to dete

5、rmine that exposed parts are acceptably insulated from supply circuit.CONTENTSDESCRIPTION PAGESPECIFICATIONS .4 - 5REAR PANEL / FRONT PANEL VIEW .6DISASSEMBLY INSTRUCTIONS .7WIRING DIAGRAM .8 - 9BLOCK DIAGRAM.10SPECIAL FUNCTION .11DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING.12-15 ADJUSTMENT POI

6、NTS DIAGRAM / AMPLIFIER ADJUSTMENT .16PCB LAYOUT .17- 40SCHEMATIC DIAGRAM .41-67ELECTRICAL PARTS LIST .68-92IC BLOCK DIAGRAM .93-117EXPLODED VIEW .118-119EXPLODED VIEW PARTS LIST .120-123SINGLE CHANNEL SERVICE KIT .124-125 PACKING DIAGRAM .126Parts marked with the symbol are critical with regard to

7、the risk of fire and electric shock. 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) 1 0.1 VS/N Ratio (A-wtd, 1kHz, 1 W, 8 ohm

8、, SL/SR/BL) - 80 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) -54 dBControlsBass (at 500 mV in, 1 W out,

9、 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.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,

10、 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 dB Audio LPF 64 dB A-wtd 68 dBChannel Separation (1 W, 20 kHz LPF) Track 65 997 Hz 55 dBDOLBY PRO LOGIC

11、 II SECTIONFrequency ResponseI/P mode : L, R : 1 V in, 1 W, 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

12、: L, R : 1 kHz, Ch L/R 60 dBI/P mode : L=R : 1 kHz, Ch C 60 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 dBHarmo

13、nic Distortion (Audio Filter) : FL/FR/C/SL/SR Track 10-14 1 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 so

14、urce impedance signal generatorUsable sensitivity (999/1000 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 dBFreque

15、ncy 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 dBvS/N Ratio (60 dB, IHF wtd) Mono 60 dB 60 dB Stereo 63 dB 63 dBFrequency Response (20 Hz - 15 kHz, 60

16、 dB) 0 1.5 dB 0 1.5 dBChannel Separation (60 dB) 100 Hz 30 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

17、(10.7 MHz) 78 dB Pilot Suppression (98 MHz) 50 dB 50 dBTHD (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 170 x 423 mmN

18、et Weight 20.8 Kg (45.76 lbs)Shipping Weight 25.7 Kg (56.54 lbs)6FRONT PANELREAR PANEL / FRONT PANEL VIEWREAR PANEL1. DIGITAL AUDIO IN/OUT2. HDMI3. COMPONENT IN/OUT4. MP DOCK5. AUDIO/VIDEO 3/4 OUT6. MONITOR(S-VIDEO,VIDEO)1. POWER BUTTON2. STANDBY LED3. INFO4. AM/FM/DB5. TUNER MODE6. MEMORY7. NAVIGAT

19、ION AND ENTER BUTTON8. VACUUM, FLUORES CENT DISPLAY(VFD)9. VOLUME10. SPEAKER A/B11. SOURCE12. LISTENING MODE13. TONE CONTROLS14. TONE DEFEAT15. FRONT INPUT/MP16. PHONES17. FRONT INPUT JACKS18. MP/MIC INPUT7. AUDIO/VIDEO 16 IN8. 7.1 CH INPUT9. XM MODULE INPUT(AH) DAB MODULE INOUT(C,CT) 10. RS-23211.

20、FM,AM ANTENNA INPUT12. SOFT CLIPPING13. +12V TRIGGER OUT14. IR IN/OUT15. ZONE 2,3,4 16. AUDIO PREOUT17. SPEAKERS A, SPEAKER B18. AC POWER INLET19. SWITCHED AC OUTLET20. POWER7DISASSEMBLY 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

21、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 then remove in the direction as indicated by the arrow 12. Refer to Figure No. 2. Figure No. 1?Figure No. 28WIRING DIAGRAM9WIRING DIAGRAM PARTS LISTItem Database Part

22、Number Description Remark 1 17-012-2965-90 CABLE ASSY 4 WAYS #26 2.5P L=400mm PSU BD-J8002A2 17-012-3943-90 CABLE ASSY 1 WAY #16 UL1672 BLUE PSU L=140mm FASTON 4.8mm BD-J80113 17-012-3944-90 CABLE ASSY 1 WAY #16 UL1672 BROWN PSU L=140mm FASTON 4.8mm BD-J80124 17-012-3940-90 CABLE ASSY 3 WAYS #26 2.5

23、P UL2854 VOL L=110 BD-J6004A/B5 17-012-3938-90 CABLE ASSY 1 WAY #18 UL1007 L=320MM DSP W/ HEADER BD-J1002A6 17-012-3378-90 CABLE ASSY 20 WAYS #28 UL2651 L=240mm KEYBOARD PCB MOUNT -J2002B7 17-012-3173-90 CABLE ASSY 14 WAYS #26 2.5P UL1533 PRE-OUT L=100 BD-J5404B8 17-012-3176-90 CABLE ASSY 3 WAYS #18

24、 3.96P UL1007 SEC L=80 BD-J5804B9 17-012-3208-90 CABLE ASSY 4 WAYS #18 3.96p UL1007 SEC BD- L=150 J8101A,J8102A10 17-012-3209-90 CABLE ASSY 4 WAYS #18 3.96P UL1007 SEC BD- L=170 J8103A+J8104A11 17-012-3174-90 CABLE ASSY 5 WAYS #18 3.96P UL1007 SPK BD- L=300mm (W/R/B/V/O) J5403B1-B512 17-012-3947-90

25、CABLE ASSY 4 WAYS #18 3.96P UL1007 L=260 SPK BD- (W/R/Y/BL) J5802B1-B413 17-012-3329-90 CABLE ASSY 3 WAYS #18 UL1007 3.96P L=420 SPK BD- J8106B1-B314 17-012-3330-90 CABLE ASSY 4 WAYS #18 UL1007 3.96P L=440 SPK BD- J8105B1-B415 17-012-3171-90 CABLE ASSY 6 WAYS #26 2.5P UL1533 L=200 V6 VD- J2006B16 17

26、-012-3404-90 CABLE ASSY 6 WAYS #26 2.5P UL1007 L=150 V6 BD- J2005B17 17-012-3939-90 CABLE ASSY 3 WAYS #26 2.5P UL2468 L=180 ISC BD- J5803B,J5810B18 17-012-3930-90 CABLE ASSY 4 WAYS #26 2.5P UL1533 L=160 V6 BD- J2008A19 17-012-3936-90 CABLE ASSY 3 WAYS #26 2.5P UL2854 L=310 CONN#1- J9006A20 17-012-39

27、37-90 CABLE ASSY 5 WAYS #26 2.5P UL2854/1533 CONN#1- L=230/320 J9004A/J9005A21 17-012-3938-90 CABLE ASSY 1 WAY #18 UL1007 L=320 CONN#1- W/ HEADER JP9001A22 17-012-3941-90 CABLE ASSY 3 WAYS #26 2.5P UL2854 L=130 CONN#1- J9008A/B23 17-012-3457-90 CABLE ASSY 8 WAYS #26 UL1007 2.5P L=120 CONN#2- J8202B2

28、4 17-012-3458-90 CABLE ASSY 10 WAYS #26 UL1007 2.5P L=80 CONN#2- J8201B25 17-010-0122-90 FFC CABLE 17 PINS P1.25 L=360 15 & 16 TUNER- PINS VOID J5404B26 17-012-2874-90 CABLE ASSY 1 WAY #16 UL1672 BLUE J8015,J8017 L=100mm 27 17-012-2875-90 CABLE ASSY 1 WAY #16 UL 1015 CHASSIS GND, GREEN/YELLOW L=100

29、AC OUTLET GND28 17-012-3166-90 CABLE ASSY 20 WAYS #28 UL2651 L=100mm J2001C,J7001C29 17-012-3298-90 CABLE ASSY 3 WAYS #18 UL1007 L=420mm J5402A/B 30 17-012-3346-90 CABLE ASSY 26 WAYS #28 UL2651 L=330mm J2301C31 17-012-3942-90 CABLE ASSY 26 WAYS #28 UL2651 L=230mm J2007C32 17-012-3948-90 CABLE ASSY 1

30、 WAY #16 UL1672 BROWN L=100 J8013,J801633 17-012-3963-90 CABLE ASSY 1 WAY #18 UL1007 L=200 W/ HEADER TUNER- J6102A34 17-012-3965-90 CABLE ASSY 3 WAYS #26 2.5P UL2547 L=500 TUNER- J9501A35 17-012-2924-90 CABLE ASSY 1 WAY AWG18 UL1015 BLACK MAIN-JP7006B-GND, L=260mm W/RING TERMINAL SEC BD-J8153A-GND 1

31、0BLOCK DIAGRAM11SPECIAL FUNCTIONFunction Keys NotesFactory Reset AH Source Down + Front/MP Factory Reset C Source UP + Front/MP Toggle IR Channel Source Down + Power Only for v1.08 or higher.Check MCU Version Source Down + Source UP For v1.03 or higher, this checks all versions.Check DSP Version Sou

32、rce Down + Listening Mode Only for v1.02 or older.Check Current Video Mode Source Down + Tone Controls MIC Test Source Down + Tone Defeat VFD Test Source Down + Display PAL/NTSC Source Down + Memory DAB/XM Source Down + Tuner Band Must cycle power before change takes effect.9k/10k Source UP + Tuner

33、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 0.5 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

34、3 seconds DAB must be selected first.Enter Diagnostics Mode Source Down + EnterDiagnostic Mode Down Source Down + Cursor RightDiagnostic Mode Up Source Down + Cursor LeftPower Off All Zones Power Toggle or Power Off for 3 seconds12DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING DSP U1007 Pin 70 - Clo

35、ck for external memory, 100MHz U1007 Pin 17 - X1001C output, 24.576MHz U1007 Pin 2 - Master clock (Analog), 12.288MHz U1007 Pin 2 - Master clock (PCM), 11.2896MHz U1007 Pin 12 Left/Right clock (Analog), 48kHz U1007 Pin 12 - Left/Right clock (PCM), 44.1kHz 13U1007 Pin 9 - Serial clock (Analog), 3.072

36、MHz MCU U2001 Pin 12 - X2001A output, 20.000MHz HDMI U12 Pin 38 U3 output, 28.636MHz 14U9 Pin 1 DAC_HS (OSD Off), 31.48kHz U9 Pin 54 DAC_VS (OSD On, NTSC), 60Hz U9 Pin 1 DAC_HS (OSD On), 15.72kHz U9 Pin 54 DAC_VS (OSD On, PAL), 50Hz U9 Pin 54 DAC_VS (OSD Off), 60Hz U9 Pin 4 DAC_FLD (OSD Off), Idle 1

37、5U9 Pin 4 DAC_FLD (OSD On, NTSC), 30Hz U9 Pin 51 PCLK (OSD On), 27MHz U9 Pin 4 DAC_FLD (OSD On, PAL), 25Hz U9 Pin 51 PCLK (OSD Off), 27MHz 16AMPLIFIER ADJUSTMENTIdle Current1. Rotate R5221 fully clockwise.2. Connect DC millivoltmeter to P5501 (i.e. Across half of R5228 and R5530, 0.22 Ohm resistor).

38、3. Turn on the unit.4. Adjust R5221 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 VRFL P5501 R5521FR P5001 R5021C P5101 R5121SL P5601 R5621SR P5201 R5221BS P5701 R5721BSR P5301 R5321ISC Adjust

39、mentA. Rotate R8214 fully clockwise.B. Use 500mV, 1kHZ sine wave, EXT7.1 input, 8ohm loading to all channels.C. Increase the output power of FL/SL/BSL channels to 80W(25.3V).D. Note the THD readings should be larger than 0.2%.E. Rotate R8214 anti-clockwise slowly until the THDreadings is below 0.1%.

40、F. Repeat for R8217 using FR/SR/BSR/C channels.ADJUSTMENT POINT DIAGRAMLEFT/RIGHT CHANNEL AMPLIFIER BOARDSECONDARY / ISC BOARD17PCB LAYOUTPOWER AMPLIFIERLEFT_CH BOARD-COPPER SIDEFirst Production runs: T71T775G00001- T71T775G00028 &T78T775G00029- T78T775G00510Production runs: T78T775G00511 and above1

41、8LEFT_CH BOARD - COMPONENT SIDEFirst Production runs: T71T775G00001- T71T775G00028 &T78T775G00029- T78T775G00510Production runs: T78T775G00511 and above19RIGHT_CH BOARD-COPPER SIDEFirst Production runs: T71T775G00001- T71T775G00028 &T78T775G00029- T78T775G00510Production runs: T78T775G00511 and abov

42、e20RIGHT_CH BOARD-COMPONENT SIDEFirst Production runs: T71T775G00001- T71T775G00028 &T78T775G00029- T78T775G00510Production runs: T78T775G00511 and above21DSP BOARD - COPPER SIDE22DSP BOARD - COMPONENT SIDE23KEY BOARD - COMPONENT SIDEKEY BOARD - COPPER SIDE24PRE-OUT BOARD- COPPER SIDE25PRE-OUT BOARD

43、-COMPONENT SIDE26VOLUME BOARD - COPPER SIDE27VOLUME BOARD - COMPONENT SIDE28F-INPUT BOARD - COPPER SIDEF-INPUT BOARD - COMPONENT SIDE29MAIN BOARD -COMPONENT SIDE30TRIGGER BOARD - COMPONENT SIDETRIGGER BOARD - COPPER SIDE31COMPONENT BOARD-COMPONENT SIDECOMPONENT BOARD-COPPER SIDE32VIDEO BOARD - COPPE

44、R SIDEVIDEO BOARD - COMPONENT SIDE33HDMI BOARD-COPPER SIDE34HDMI BOARD-COMPONENT SIDE35PSU-ISC BOARD-COMONENT SIDEPSU-ISC BOARD-COPPER SIDE36CONNECTOR 1 BOARD-COMPONENT SIDECONNECTOR 1 BOARD-COPPER SIDE37MCU BOARD-COMPONENT SIDEMCU BOARD-COPPER SIDE38PSU-SECONDARY BOARD-COMPONENT SIDEPSU-STD BOARD-C

45、OMPONENT SIDE39CONNECTOR-3 BOARD-COMPONENT SIDECONNECTOR-4 BOARD-COMPONENT SIDESPEAKER BOARD-COMPONENT SIDE40CONNECTOR-2 BOARD-COMPONENT SIDE41aPOWER AMPLIFIER RIGHT-CHSCHEMATIC DIAGRAMFRSRCEN.SBRFR(A)FR(B)CENTERSRSBRQ5006MMBT5401LT1ECBQ5001MMBT5551LT1ECBQ5002MMBT5551LT1ECBQ5003MMBT5551LT1ECBQ5004MM

46、BT5551LT1R50024701/4WR500310kR5001100k1/4WR50051kR50091kR500722R501122R50082701/4WR5013100ECBQ5005MMBT5551LT1R500647kD5002LL4148D5003LL4148C50022.2u 50VR500427k1/4WC5001100u50VR50123601/4WC5004470u16VQ50072SB1275R5010100R501447D5004LL4148Q5008MMBT5401LT1Q50092SB1275D5005LL4148D5006LL4148C5007100pC50

47、0510pC500610pC5008100pR501510kQ50102SD1918ECBQ5011MMBT5551LT1R501647D5007LL4148D5008LL4148Q5012MMBT5551LT1R501756k1/4WR50192kR5020330C50100.1u 50V123R50211kC500947u100VC501147u100VR5018471/2WQ5013MMBT5551LT1Q5014MMBT5401LT1R50231k1/2WC5012100p100VC5015100p100VC5013100pC5014100pR5025471/4WR5024471/4W

48、Q50152SD1918Q50172SC5669Q50162SB1275Q50182SA2031R50262201/2WC5017100p100VR50294.71/4WR50274.71/4WC5016100p100VR5036102WC50180.1u_M 100VR50353.31WL50010.2uHD500115V1/4WR5022471/2WR50280.225WR50300.225WQ5019MMBT5551LT1R503110kR503433kR50331.5kD5009LL4148R5032180kR5037180kR5137180kR5132180kD5109LL4148R

49、51331.5kR513433kR513110kQ5119MMBT5551LT1R51300.225WR51280.22 5WR5122471/2WD510115V1/4WL51010.2uHR51353.31WC51180.1u_M 100VR5136102WC5116100p100VR51274.71/4WR51294.71/4WC5117100p100VR51262201/2WQ51182SA2031Q51162SB1275Q51172SC5669Q51152SD1918R5124471/4WR5125471/4WC5114100pC5113100pC5115100p100VC51121

50、00p100VR51231k1/2WQ5114MMBT5401LT1Q5113MMBT5551LT1R5118471/2WC511147u100VC510947u100V123R51211kC51100.1u 50VR5120330R51192kR511756k1/4WQ5112MMBT5551LT1D5108LL4148D5107LL4148R511647ECBQ5111MMBT5551LT1Q51102SD1918R511510kC5108100pC510610pC510510pC5107100pD5106LL4148D5105LL4148Q51092SB1275Q5108MMBT5401