Nad-T-765-Service-Manual(1) 电路图 维修手册.pdf

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1、NAD SERVICE MANUAL T 765 T 765 Surround Sound Receiver Surround Sound Receiver Draft Date August 2009RadioFans.CN 收音机爱 好者资料库 2 SAFETY INFORMATION Manufactured 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 w

2、orldwide 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 3 SERVICE SAFETY PRECAUTIONS 1. Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPL

3、ACE ONLY WITH SAME TYPE OF FUSE. Reference Designator Database Part Number Description F8001*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/

4、CSA/VDE/SEMKO F8001*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 expo

5、sed parts are acceptably insulated from supply circuit. CONTENTS DESCRIPTION PAGE SPECIFICATIONS .4 - 5 REAR PANEL / FRONT PANEL VIEW .6 DISASSEMBLY INSTRUCTIONS .7 WIRING DIAGRAM .8 - 9 BLOCK DIAGRAM.10 SPECIAL FUNCTION .11 DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING.11-12 ADJUSTMENT POINTS DI

6、AGRAM / AMPLIFIER ADJUSTMENT .13 PCB LAYOUT .14- 37 SCHEMATIC DIAGRAM .38-63 ELECTRICAL PARTS LIST .64-87 IC BLOCK DIAGRAM .88-108 EXPLODED VIEW .109-110 EXPLODED VIEW PARTS LIST .111-114 SINGLE CHANNEL SERVICE KIT .115-117 PACKING DIAGRAM .118 Parts marked with the symbol are critical with regard t

7、o the risk of fi re and electric shock. RadioFans.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/BL/BR) 0.1 % Input Sensitivity (ref. 8 ohms, 1 kHz) 0.9 0.1

8、 V S/N Ratio (A-wtd, 1kHz, 1 W, 8 ohm, FL/C/FR/SL/SR/BL/BR) - 80 dB 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, 1

9、W, 1 kHz) -57 dB Controls Bass (at 500 mV in, 1 W out, 100 Hz) 10 dB 2 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 confi g.2 SL Track 46 200 - 20 kHz 0.8 dB SR Track 47 200 - 20 kHz 0.8 dB C Track

10、 44 200 - 20 kHz 0.8 dB Harmonic Distortion (1 W, Audio LPF, Dolby Congfi g 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 dB Channel Se

11、paration (1 W, 20 kHz LPF) Track 65 997 Hz 55 dB DOLBY PRO LOGIC II SECTION Frequency Resporse I/P mode : L, R : 1 V in, 1 W, Ch L/R 40 Hz 0 2.0 dB 20 Hz 0 2.0 dB I/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 dB I/P mode : L=-R : 1 V in, 1 W, Ch SL/SR 40 Hz 0 2.0 dB 20 kHz 0

12、 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 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 % 5 DTS SECTION Output Level (Vol 0 dB) : FL/FR/C/SL/SR Track 6 1 kHz 0.5 0.2/+0

13、.8 W Channel Difference (FL ref) : FL/FR/C/SL/SR Track 6 1 kHz 0 1.0 dB Harmonic 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 dB Subwoofer Output Level 1 kHz ref at pre-out (FL) Play Track 10, charge to 15 12.5 1.5 dB AM

14、TUNER SECTION Input level is expressed as the reading in open circuit of 75-ohm source impedance signal generator Usable sensitivity (999/1000 kHz) 60 dBV 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 Output 170 -20/+30 mV L

15、oop sensitivity (20 dB S/N) 999/1000 kHz 66 dB 603/600 kHz 66 dB 1404/1400 kHz 66 dB Frequency Response (100 - 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 dB 15 dBv S/N

16、Ratio (60 dB, IHF wtd) Mono 60 dB 60 dB Stereo 63 dB 63 dB Frequency Response (20 Hz - 15 kHz, 60 dB) 0 1.5 dB 0 1.5 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 Suppr

17、ession (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 Pilot Suppression (98 MHz) 50 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 Sensitivity On 24 dB 24 dB Off 15 dB 15

18、dB RDS decode Sensitivity 26 dB PHYSICAL SPECIFICATIONS Dimensions (Width x Height x Depth) 435 x 170 x 423 mm Net Weight 20.5 Kg (45.10 lbs) Shipping Weight 24.0 Kg (52.80 lbs) 6 FRONT PANEL REAR PANEL / FRONT PANEL VIEW 1. DIGITAL AUDIO IN/OUT 2. HDMI 3. COMPONENT IN &OUT 4. MP DOCK 5. AUDIO 3/4 O

19、UT 6. MONITOR(S-VIDEO,VIDEO) 7. AUDIO/VEDIO IN 1. POWER BUTTON 2. STANDBY LED 3. INFO 4. AM/FM/DB 5. TUNER MODE 6. MEMORY 7. NAVIGATION AND ENTER BUTTON 8. VACUUM, FLUORES CENT DISPLAY(VFD) 9. VOLUME 10. SPEAKER A/B 11. SOURCE 12. LISTENING MODE 13. TONE CONTROLS 14. TONE DEFEAT 15. FRONT INPUT/MP 1

20、6. PHONES 17. FRONT INPUT JACKS 18. MP/MIC INPUT 8. 7.1 CH INPUT 9. XM MODULE INPUT(AH) DAB MODULE INOUT(C,CT) 10. RS-232 11. FM,AM ANTENNA INPUT 12. SOFT CLIPPING 13. +12V TRIGGER OUT 14. IR IN/OUT 15. ZONE 2,3,4 16. AUDIO PREOUT 17. SPEAKERS A, SPEAKER B 18. AC POWER INLET 19. SWITCHED AC OUTLET 2

21、0. POWER 3456789 10161514 12 1718131211 123467891011 161820 121314 17 15 19 5 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. ? ? ? ? ? ? ? ? ? ? 2. Pull both sides of t

22、he 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. 2 8 WIRING DIAGRAM 9 WIRING DIAGRAM PARTS LIST ITEM PART NO. DESCRIPTION REMARK 1 17-012-2965-90 CABLE ASSY 4 WAYS #26 2.5P L=400m

23、m PSU BD-J8002A 2 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 3 WAYS #26 2.5P UL2854 L=110 VOL BD-J6004A/B 5 17-012-3938-90 CABLE ASSY 1 WAY #18 UL10

24、07 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-J5404B 8 17-012-3176-90 CABLE ASSY 3 WAYS #18 3.96P UL1007 L=80 SEC BD-J5804B 9 17-012-3208-90 CABLE ASSY 4 WAYS #18

25、3.96p UL1007 L=150 SEC BD-J8101A,J8102A 10 17-012-3209-90 CABLE ASSY 4 WAYS #18 3.96P UL1007 L=170 SEC BD-J8103A+J8104A 11 17-012-3174-90 CABLE ASSY 5 WAYS #18 3.96P UL1007 L=300mm SPK BD-J5403B1-B5 (W/R/B/V/O) 12 17-012-3175-90 CABLE ASSY 4 WAYS #18 3.96P UL1007 L=300mm SPK BD-J5802B1-B4 (W/R/Y/BL)

26、 13 17-012-3329-90 CABLE ASSY 3 WAYS #18 UL1007 3.96P L=420 SPK BD-J8106B1-B3 14 17-012-3330-90 CABLE ASSY 4 WAYS #18 UL1007 3.96P L=440 SPK BD-J8105B1-B4 15 17-012-3171-90 CABLE ASSY 6 WAYS #26 2.5P UL1533 L=200 V6 VD-J2006B 16 17-012-3404-90 CABLE ASSY 6 WAYS #26 2.5P UL1007 L=150 V6 BD-J2005B 17

27、17-012-3939-90 CABLE ASSY 3 WAYS #26 2.5P UL2468 L=180 ISC BD-J5803B,J5810B 18 17-012-3930-90 CABLE ASSY 4 WAYS #26 2.5P UL1533 L=160 V6 BD-J2008A 19 17-012-3936-90 CABLE ASSY 3 WAYS #26 2.5P UL2854 L=310 CONN#1-J9006A 20 17-012-3937-90 CABLE ASSY 5 WAYS #26 2.5P UL2854/1533 CONN#1-J9004A/J9005A L=2

28、30/320 21 17-012-3938-90 CABLE ASSY 1 WAY #18 UL1007 L=320 W/ HEADER CONN#1-JP9001A 22 17-012-3941-90 CABLE ASSY 3 WAYS #26 2.5P UL2854 L=130 CONN#1-J9008A/B 23 17-012-3457-90 CABLE ASSY 8 WAYS #26 UL1007 2.5P L=120 CONN#2-J8202B 24 17-012-3458-90 CABLE ASSY 10 WAYS #26 UL1007 2.5P L=80 CONN#2-J8201

29、B 25 17-010-0122-90 FFC CABLE 17 PINS P1.25 L=360 15 & 16 PINS VOID TUNER-J5404B 26 17-012-2874-90 CABLE ASSY 1 WAY #16 UL1672 BLUE L=100mm J8015,J8017 27 17-012-2875-90 CABLE ASSY 1 WAY #16 UL 1015 GREEN/YELLOW CHASSIS GND, L=100 AC OUTLET GND 28 17-012-3166-90 CABLE ASSY 20 WAYS #28 UL2651 L=100mm

30、 J2001C,J7001C 29 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 J2301C 31 17-012-3942-90 CABLE ASSY 26 WAYS #28 UL2651 L=230mm J2007C 32 17-012-3948-90 CABLE ASSY 1 WAY #16 UL1672 BROWN L=100 J8013,J8016 33 17-012-3963-90 CABLE A

31、SSY 1 WAY #18 UL1007 L=200 W/ HEADER TUNER-J6102A 34 17-012-3965-90 CABLE ASSY 3 WAYS #26 2.5P UL2547 L=500 TUNER-J9501A 35 17-012-2924-90 CABLE ASSY 1 WAY AWG18 UL1015 BLACK L=260mm MAIN-JP7006B-GND, W/RING TERMINAL (RoHS) SEC BD-J8153A-GND 10 BLOCK DIAGRAM 11 SPECIAL FUNCTION Function Keys Notes F

32、actory 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 Source Down + Listening Mode Only for v1.02 or older.

33、 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 Band Must reselect AM before change takes effect

34、. XM 1kHz Test Tone Tuner Band + Tuner Mode XM must be selected fi rst. XM Signal Strength Tuner Mode for 0.5 seconds XM must be selected fi rst. XM Diagnostics Mode Tuner Mode for 3 seconds XM must be selected fi rst. Check DAB Module Version Tuner Mode for 3 seconds DAB must be selected fi rst. En

35、ter Diagnostics Mode Source Down + Enter Diagnostic Mode Down Source Down + Cursor Right Diagnostic Mode Up Source Down + Cursor Left Power Off All Zones Power Toggle or Power Off for 3 seconds DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING U1001 Pin 17 - X1001C output, 24.576MHz U1001 Pin 2 - Maste

36、r clock (Analog), 12.288MHz U1001 Pin 70 - Clock for external memory, 100MHz U1001 Pin 2 - Master clock (PCM), 11.2896MHz U1001 Pin 12 - Left/Right clock (Analog), 48kHzU1001 Pin 12 - Left/Right clock (PCM), 44.1kHz 12 U1001 Pin 9 - Serial clock (Analog), 3.072MHzU1001 Pin 9 - Serial clock (PCM), 2.

37、8224MHz U2001 Pin 12 - X2001A output, 20.000MHzU4520 Pin 7 - X4503 output, 13.500MHz U4507 Pin 75 - X4501 output, 14.31818MHz 13 AMPLIFIER ADJUSTMENT Idle Current 1. Rotate R5221 fully clockwise. 2. Connect DC millivoltmeter to P5501 (i.e. Across half of R5228 and R5530, 0.22 Ohm resistor). 3. Turn

38、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 VR FL P5501 R5521 FR P5001 R5021 C P5101 R5121 SL P5601 R5621 SR P5201 R5221 BS P5701 R5721 BSR P5301 R5321 ISC Ad

39、justment A. 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 be

40、low 0.1%. F. Repeat for R8217 using FR/SR/BSR/C channels. ADJUSTMENT POINT DIAGRAM LEFT/RIGHT CHANNEL AMPLIFIER BOARD SECONDARY / ISC BOARD 14 PCB LAYOUT POWER AMPLIFIER LEFT_CH BOARD-COPPER SIDE First Production runs: T76T765G00001-T76T765G00650 & T76T765T00651-T76T765T00950 Production runs: T76T76

41、5T00951 and above 15 LEFT_CH BOARD - COMPONENT SIDE First Production runs: T76T765G00001-T76T765G00650 & T76T765T00651-T76T765T00950 Production runs: T76T765T00951 and above 16 RIGHT_CH BOARD-COPPER SIDE First Production runs: T76T765G00001-T76T765G00650 & T76T765T00651-T76T765T00950 Production runs

42、: T76T765T00951 and above 17 RIGHT_CH BOARD-COMPONENT SIDE First Production runs: T76T765G00001-T76T765G00650 & T76T765T00651-T76T765T00950 Production runs: T76T765T00951 and above 18 DSP BOARD - COPPER SIDE 19 DSP BOARD - COMPONENT SIDE 20 KEY BOARD - COPONENT SIDE 21 PRE-OUT BOARD- COPPER SIDE 22 PRE-OUT BOARD-COMPONENT SIDE 23 VOLUME BOARD - COPPER SIDE 24 VOLUME BOARD - COMPONENT SIDE 25 F-INPUT BOARD - COPPER SIDE F-INPUT BOARD - COMPONENT SIDE 26 MAIN BOARD -COMPONENT SIDE MAIN BOARD-COPPER SIDE 27 TRIGGER BOARD - COMPONENT SIDE TRIGGER B