NAD-T765-avr-sm 维修电路原理图.pdf

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1、NADSERVICE MANUALT 765T 765Surround 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 worldwide

2、 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 5T F8002*C,CT 20-001-0069-90 FUSE 800mA 250V TIME LAG LBC 5x20mm 5T UL/CSA/VDE/SEMKO F8002*AH 20-001-0076-90 FUSE 1.6A 250V TIME LAG LBC 5x20mm 5T UL/CSA/VDE/SEMKO F8

4、001*C,CT 20-001-0072-90 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 determine that exposed parts are accep

5、tably 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.11-12 ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT

6、 .13PCB LAYOUT .14- 37SCHEMATIC DIAGRAM .38-63ELECTRICAL PARTS LIST .64-87IC BLOCK DIAGRAM .88-108EXPLODED VIEW .109-110EXPLODED VIEW PARTS LIST .111-114SINGLE CHANNEL SERVICE KIT .115-117PACKING DIAGRAM .118Parts marked with the symbol are critical with regard to the risk of fire and electric shock

7、. 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/BL/BR) 0.1 %Input Sensitivity (ref. 8 ohms, 1 kHz) 0.9 0.1 VS/N Ratio (A-wtd, 1kHz, 1 W, 8 ohm, FL/C/FR/SL/SR/BL/BR) - 80 dB

8、Frequency 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, 1 W, 1 kHz) -57 dBControlsBass (at 500 mV in, 1 W out, 100 Hz) 10 dB 2 dBT

9、reble (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, Dolby Congfig 1) FL

10、 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 II SECTIONFrequency

11、 ResporseI/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 : L, R : 1 kHz, Ch L

12、/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 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

13、 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 source impedance signal

14、 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 dBFrequency Response (100 - 2

15、.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 dB) 0 1.5 dB 0 1.5 d

16、BChannel Separation (60 dB) 100 Hz 30 dB 30 dB 1 k 38 dB 38 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 Pilo

17、t Suppression (98 MHz) 50 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 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 mmNet Weight 20.5 Kg

18、 (45.10 lbs)Shipping Weight 24.0 Kg (52.80 lbs)6FRONT PANELREAR PANEL / FRONT PANEL VIEW 1. DIGITAL AUDIO IN/OUT2. HDMI3. COMPONENT IN &OUT4. MP DOCK5. AUDIO 3/4 OUT6. MONITOR(S-VIDEO,VIDEO)7. AUDIO/VEDIO IN1. POWER BUTTON2. STANDBY LED3. INFO4. AM/FM/DB5. TUNER MODE6. MEMORY7. NAVIGATION AND ENTER

19、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 INPUT8. 7.1 CH INPUT9. XM MODULE INPUT(AH) DAB MODULE INOUT(C,CT) 10. RS-23211. FM,AM ANTENNA INPUT12. SOFT CLIPPI

20、NG13. +12V TRIGGER OUT14. IR IN/OUT15. ZONE 2,3,4 16. AUDIO PREOUT17. SPEAKERS A, SPEAKER B18. AC POWER INLET19. SWITCHED AC OUTLET20. POWER34567891016151412171813121112346789101116182012131417151957DISASSEMBLY INSTRUCTIONS1. Remove machine screws M4.0 x 8.0 (1 to 6) from the side panels. Remove tap

21、ping 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 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

22、 LIST ITEM PART NO. DESCRIPTION REMARK1 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 L=140mm PSU BD-J8011 FASTON 4.8mm 3 17-012-3944-90 CABLE ASSY 1 WAY #16 UL1672 BROWN L=140mm PSU BD-J8012 FASTON 4.8mm 4 17-012-3940-90 CABLE ASSY

23、3 WAYS #26 2.5P UL2854 L=110 VOL BD-J6004A/B 5 17-012-3938-90 CABLE ASSY 1 WAY #18 UL1007 L=320MM DSP BD-J1002A W/ HEADER 6 17-012-3378-90 CABLE ASSY 20 WAYS #28 UL2651 L=240mm DSP BD-J1002A PCB MOUNT 7 17-012-3173-90 CABLE ASSY 14 WAYS #26 2.5P UL1533 L=100 PRE-OUT BD-J5404B8 17-012-3176-90 CABLE A

24、SSY 3 WAYS #18 3.96P UL1007 L=80 SEC BD-J5804B9 17-012-3208-90 CABLE ASSY 4 WAYS #18 3.96p UL1007 L=150 SEC BD-J8101A,J8102A10 17-012-3209-90 CABLE ASSY 4 WAYS #18 3.96P UL1007 L=170 SEC BD-J8103A+J8104A11 17-012-3174-90 CABLE ASSY 5 WAYS #18 3.96P UL1007 L=300mm SPK BD-J5403B1-B5 (W/R/B/V/O) 12 17-

25、012-3175-90 CABLE ASSY 4 WAYS #18 3.96P UL1007 L=300mm SPK BD-J5802B1-B4 (W/R/Y/BL) 13 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-

26、J2006B16 17-012-3404-90 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

27、-012-3937-90 CABLE ASSY 5 WAYS #26 2.5P UL2854/1533 CONN#1-J9004A/J9005A L=230/320 21 17-012-3938-90 CABLE ASSY 1 WAY #18 UL1007 L=320 W/ HEADER CONN#1-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-J82

28、02B24 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 PINS VOID TUNER-J5404B26 17-012-2874-90 CABLE ASSY 1 WAY #16 UL1672 BLUE L=100mm J8015,J801727 17-012-2875-90 CABLE ASSY 1 WAY #16 UL 1015 GREEN/YELLOW CHASSIS GND, 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/B30 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 L=260mm MAIN-JP7006B-GND, W/RING TERMINAL (RoHS) SEC BD-J8153A-

31、GND10BLOCK 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

32、 Source 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 + Tu

33、ner 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

34、for 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 secondsDETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGINGU1001 Pin 17 - X1001C

35、 output, 24.576MHzU1001 Pin 2 - Master clock (Analog), 12.288MHzU1001 Pin 70 - Clock for external memory, 100MHzU1001 Pin 2 - Master clock (PCM), 11.2896MHzU1001 Pin 12 - Left/Right clock (Analog), 48kHzU1001 Pin 12 - Left/Right clock (PCM), 44.1kHz12U1001 Pin 9 - Serial clock (Analog), 3.072MHzU100

36、1 Pin 9 - Serial clock (PCM), 2.8224MHzU2001 Pin 12 - X2001A output, 20.000MHzU4520 Pin 7 - X4503 output, 13.500MHzU4507 Pin 75 - X4501 output, 14.31818MHz13AMPLIFIER ADJUSTMENTIdle Current1. Rotate R5221 fully clockwise.2. Connect DC millivoltmeter to P5501 (i.e. Across half of R5228 and R5530, 0.2

37、2 Ohm resistor).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

38、 R5321ISC AdjustmentA. 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 THDreading

39、s is below 0.1%.F. Repeat for R8217 using FR/SR/BSR/C channels.ADJUSTMENT POINT DIAGRAMLEFT/RIGHT CHANNEL AMPLIFIER BOARDSECONDARY / ISC BOARD14PCB LAYOUTPOWER AMPLIFIERLEFT_CH BOARD-COPPER SIDEFirst Production runs: T76T765G00001-T76T765G00650 &T76T765T00651-T76T765T00950Production runs: T76T765T00

40、951 and above15LEFT_CH BOARD - COMPONENT SIDEFirst Production runs: T76T765G00001-T76T765G00650 &T76T765T00651-T76T765T00950Production runs: T76T765T00951 and above16RIGHT_CH BOARD-COPPER SIDEFirst Production runs: T76T765G00001-T76T765G00650 &T76T765T00651-T76T765T00950Production runs: T76T765T0095

41、1 and above17RIGHT_CH BOARD-COMPONENT SIDEFirst Production runs: T76T765G00001-T76T765G00650 &T76T765T00651-T76T765T00950Production runs: T76T765T00951 and above18DSP BOARD - COPPER SIDE19DSP BOARD - COMPONENT SIDE20KEY BOARD - COPONENT SIDE21PRE-OUT BOARD- COPPER SIDE22PRE-OUT BOARD-COMPONENT SIDE2

42、3VOLUME BOARD - COPPER SIDE24VOLUME BOARD - COMPONENT SIDE25F-INPUT BOARD - COPPER SIDEF-INPUT BOARD - COMPONENT SIDE26MAIN BOARD -COMPONENT SIDEMAIN BOARD-COPPER SIDE27TRIGGER BOARD - COMPONENT SIDETRIGGER BOARD - COPPER SIDE28COMPONENT BOARD-COMPONENT SIDECOMPONENT BOARD-COPPER SIDE29VIDEO BOARD -

43、 COPPER SIDEVIDEO BOARD - COMPONENT SIDE30HDMI BOARD-COPPER SIDE (FROM SN T79T765T02405)31HDMI BOARD-COMPONENT SIDE (FROM SN T79T765T02405)32PSU-ISC BOARD-COMONENT SIDEPSU-ISC BOARD-COPPER SIDE33CONNECTOR 1 BOARD-COMPONENT SIDECONNECTOR 1 BOARD-COPPER SIDE34MCU BOARD-COMPONENT SIDEMCU BOARD-COPPER S

44、IDE35PSU-SECONDARY BOARD-COMPONENT SIDEPSU-STD BOARD-COMPONENT SIDE36CONNECTOR-3 BOARD-COMPONENT SIDECONNECTOR-4 BOARD-COMPONENT SIDESPEAKER BOARD-COMPONENT SIDE37CONNECTOR-2 BOARD-COMPONENT SIDE38aPOWER AMPLIFIER RIGHT-CHSCHEMATIC DIAGRAMFRSRCEN.SBRFR(A)FR(B)CENTERSRSBRQ5006MMBT5401LT1ECBQ5001MMBT5

45、551LT1ECBQ5002MMBT5551LT1ECBQ5003MMBT5551LT1ECBQ5004MMBT5551LT1R50024701/4WR500310kR5001100k1/4WR50051kR50091kR500722R501122R50082701/4WR5013100ECBQ5005MMBT5551LT1R500647kD5002LL4148D5003LL4148C50022.2u 50VR500427k1/4WC5001100u50VR50123601/4WC5004470u16VQ50072SB1275R5010100R501447D5004LL4148Q5008MMB

46、T5401LT1Q50092SB1275D5005LL4148D5006LL4148C5007100pC500510pC500610pC5008100pR501510kQ50102SD1918ECBQ5011MMBT5551LT1R501647D5007LL4148D5008LL4148Q5012MMBT5551LT1R501756k1/4WR50192kR5020330C50100.1u 50V123R50211kC500947u100VC501147u100VR5018471/2WQ5013MMBT5551LT1Q5014MMBT5401LT1R50231k1/2WC5012100p100

47、VC5015100p100VC5013100pC5014100pR5025471/4WR5024471/4WQ50152SD1918Q50172SC5669Q50162SB1275Q50182SA2031R50262201/2WC5017100p100VR50294.71/4WR50274.71/4WC5016100p100VR5036102WC50180.1u_M 100VR50353.31WL50010.2uHD500115V1/4WR5022471/2WR50280.225WR50300.225WQ5019MMBT5551LT1R503110kR503433kR50331.5kD5009

48、LL4148R5032180kR5037180kR5137180kR5132180kD5109LL4148R51331.5kR513433kR513110kQ5119MMBT5551LT1R51300.225WR51280.22 5WR5122471/2WD510115V1/4WL51010.2uHR51353.31WC51180.1u_M 100VR5136102WC5116100p100VR51274.71/4WR51294.71/4WC5117100p100VR51262201/2WQ51182SA2031Q51162SB1275Q51172SC5669Q51152SD1918R5124

49、471/4WR5125471/4WC5114100pC5113100pC5115100p100VC5112100p100VR51231k1/2WQ5114MMBT5401LT1Q5113MMBT5551LT1R5118471/2WC511147u100VC510947u100V123R51211kC51100.1u 50VR5120330R51192kR511756k1/4WQ5112MMBT5551LT1D5108LL4148D5107LL4148R511647ECBQ5111MMBT5551LT1Q51102SD1918R511510kC5108100pC510610pC510510pC5

50、107100pD5106LL4148D5105LL4148Q51092SB1275Q5108MMBT5401LT1D5104LL4148R511447R5110100Q51072SB1275C5104470u16VR51123601/4WC5101100u50VR510427k1/4WC51022.2u 50VD5103LL4148D5102LL4148R510647kECBQ5105MMBT5551LT1R5113100R51082701/4WR511122R510722R51091kR51051kR5101100k1/4WR510310kR51024701/4WECBQ5104MMBT55