NAD-T175-int-sm维修电路原理图.pdf

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1、NAD SERVICE MANUAL T 175 T 175 AV Tuner Pre-Amplifi er AV Tuner Pre-Amplifi er DRAFT DATE: MAY 2008 RadioFans.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 wo

2、rldwide 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. MODELT 175 AV TUNER PREAMPLIFIER POWER RATING 120V 60Hz 2A NAD ELECTRONICS INTERNATIONAL 633 GRANITE COURT, PICKERING, ON, CANADA L1W 3K1 DE

3、SIGNED & ENGINEERED IN CANADA, CUSTOM MANUFACTURED TO NAD SPECIFICATIONS IN CHINA MODELT 175 AV TUNER PREAMPLIFIER POWER RATING 230V 50Hz 1A NAD ELECTRONICS INTERNATIONAL DESIGNED & ENGINEERED IN CANADA, CUSTOM MANUFACTURED TO NAD SPECIFICATIONS IN CHINA RadioFans.CN 收音机爱 好者资料库 3 SERVICE SAFETY PREC

4、AUTIONS 1. Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. Reference Designator Database Part Number Description F8001*AH 20-001-0076-90 FUSE 1.6A 250V TIME LAG LBC 5x20mm TSD UL/CSA/VDE/SEMKO F8001*C,CT 20-001-0066-90 Fuse TIME-LAG

5、 1A/250VAC 5X20mm TSD UL/CSA/VDE/CCC (WALTER) F8002*AH 20-001-0066-90 Fuse TIME-LAG 1A/250VAC 5X20mm TSD UL/CSA/VDE/CCC (WALTER) F8002*C,CT 20-001-0068-90 FUSE TIME-LAG 500mA 250VAC 5X20mm TSD UL/CSA/VDE/CCC WALTER NOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY. 2. Safety check out (Only U.

6、S.A. model) Before returning the product to the customer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from supply circuit. Parts marked with the symbol are critical with regard to the risk of fi re and electric shock. CONTENTS DESCRIPTION

7、PAGE SPECIFICATIONS .4 - 6 REAR PANEL / FRONT PANEL VIEW .7 DISASSEMBLY INSTRUCTIONS .8 WIRING DIAGRAM .9 - 10 BLOCK DIAGRAM.11 SPECIAL FUNCTION .12 DETAILS & WAVEFORMS ON SYSTEM & TEST & DEBUGGING.13-16 PCB LAYOUT .17- 34 SCHEMATIC DIAGRAM .35-53 ELECTRICAL PARTS LIST .54-72 IC BLOCK DIAGRAM .73-96

8、 EXPLODED VIEW .97 EXPLODED VIEW PARTS LIST .98-100 PACKING DIAGRAM .101 RadioFans.CN 收音机爱 好者资料库 4 SPECIFICATIONS PRE AMPLIFIER SECTION Rated distortion (Ext 7.1 1kHz 500mV input ,Pre-out 1V with 30kHz LPF, FL/C/FR) 0.1 % (Ext 7.1 1kHz 500mV input ,Pre-out 1V with 30kHz LPF, SL/SR/BL/BR) 0.1 % S/N R

9、atio (Ext 7.1 1kHz 500mV input ,Pre-out 1V with A-WTD, 1k termination, - 85 dB FL/C/FR/SL/SR/BL/BR) 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 Pre-out, 100 H

10、z) 0.5 % Crosstalk (500 mV input, ref 1V out, 1 kHz) -60 dB Controls Bass (at 500 mV in, ref 1V out, 100 Hz) 10 dB 2 dB Treble (at 500 mV in, ref 1V out, 100 Hz) 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 k

11、Hz 0.8 dB SR Track 47 200 - 20 kHz 0.8 dB C Track 44 200 - 20 kHz 0.8 dB Harmonic Distortion (1 V, Audio LPF, Dolby Confi 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 100mV Pre-out, Track 35) C

12、CIR / ARM 65 dB Audio LPF 70 dB A-wtd 70 dB DOLBY PRO LOGIC II SECTION Frequency Resporse I/P mode : L, R : 1 V in, 1V Pre-out, Ch L/R 40 Hz 0 2.0 dB 20 kHz 0 2.0 dB I/P mode : L=R : 1 V in, 1V Pre-out, 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, 1V Pre-out, Ch SL/SR 40 Hz

13、0 2.0 dB 20 kHz 0 2.0 dB S/N Ratio (200 mV in, 100mV Pre-out, 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, 100mV Pre-out, w/ 80 kHz LPF, 1kHz) 0.2 % MAX VOL PLII Music mode, 1kHz, 1Vp-p, CD i

14、n, 40 dB NOISE connect to T775 Ext 7.1, measure at T775 Spk out, with ref. to 1W S/N (L,R,C,SL,SR) RadioFans.CN 收音机爱 好者资料库 5 DTS SECTION Output Level (Vol 0 dB) : FL/FR/C/SL/SR Track 6 1 kHz 200 10mV Channel Difference (FL ref) : FL/FR/C/SL/SR Track 6 1 kHz 0 1.5 dB Harmonic Distortion (Audio Filter

15、) : 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, change to 15 12.5 1.5 dB NOISE MEASUREMENT Surround mode noise (Preout) DVD input 1V (L 20-20kHz -72dB only), volume -12dB, Enhanced

16、Stereo 1 mode, A-WTD -75dB 100mV Preout output reference Surround mode noise (Subwoofer out) DVD input 1V 20-20kHz -75dB (L only), volume -12dB, Enhanced Stereo 1 A-WTD -78dB mode, 1V Preout output reference Surround mode noise (Preout) DVD input 1V (L 20-20kHz -48dB only), maximum volume, Enhanced

17、Stereo 1 mode, A-WTD -50dB 100mV Preout output reference Surround mode noise (Subwoofer out) DVD input 1V 20-20kHz -67dB (L only), maximum volume -12dB, Enhanced A-WTD -72dB Stereo 1 mode, 1V Preout output reference AM TUNER SECTION Input level is expressed as the reading in open circuit of 75-ohm s

18、ource 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 Loop sensitivity (20 dB S/N) 999/1000 kHz 66 dB 603/600 kHz 66 dB 1404/1400 kHz 66

19、 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 Ratio (60 dB, IHF wtd) Mono 60 dB 60 dB Stereo 63 dB 63 dB Frequency Response (20

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 32 dB 32 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 Suppression (60 dB, 100% Mod. FM, 30% Mod. AM) 48 dB 48 dB Image Rejection (119.4 MHz)

21、 65 dB RadioFans.CN 收音机爱 好者资料库 6 I.F. Rejection (10.7 MHz) 78 dB Pilot Suppression (98 MHz) 50 dB 50 dB THD (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 dB RDS decode Sensitivity 26 dB PHYSICAL SPECIFICATIONS Dim

22、ensions (Width x Height x Depth) 435 x 134 x 353 mm Net Weight 9.45 Kg (20.79 lbs) Shipping Weight 13.9 Kg (30.58 lbs) RadioFans.CN 收音机爱 好者资料库 7 FRONT PANEL REAR PANEL / FRONT PANEL VIEW REAR PANEL 1. 7.1 CH INPUT 2. AUDIO PREOUT 3. MP DOCK 4. FM,AM ANTENNA INPUT 5. XM MODULE INPUT(AH) DAB MODULE IN

23、OUT(C,CT) 6. RS-232 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. REMOTE SENSOR 10. VOLUME 11. SOURCE 12. LISTENING MODE 13. TONE CONTROLS 14. TONE DEFEAT 15. FRONT INPUT/MP 16. PHONES 17. FRONT INPUT

24、 JACKS 18. MP/MIC INPUT 7. +12V TRIGGER OUT 8. IR IN/OUT 9. AUDIO/VIDEO 16 IN 10. MONITOR(S-VIDEO,VIDEO) 11. AUDIO/VIDEO 3/4 OUT 12. ZONE 2,3,4 13. HDMI 14. DIGITAL AUDIO IN/OUT 15. COMPONENT IN/OUT 16. AC POWER INLET 17. SWITCHED AC OUTLET 18. POWER RadioFans.CN 收音机爱 好者资料库 8 DISASSEMBLY INSTRUCTION

25、S 1. 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. 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. Fig

26、ure No. 1 Figure No. 2 RadioFans.CN 收音机爱 好者资料库 9 WIRING DIAGRAM RadioFans.CN 收音机爱 好者资料库 10 WIRING DIAGRAM PARTS LIST Item Database Part Number Description Remark 1 17-012-3970-90 CABLE ASSY 4 WAYS AWG26 2.5P UL2468 PSU-J8002A L=600mm (RoHS) 2 17-012-3966-90 CABLE ASSY 1 WAY AWG18 UL1672 BLUE PSU-J80

27、11 L=120mm FASTON 4.8mm (RoHS) 3 17-012-3967-90 CABLE ASSY 1 WAY AWG18 UL1672 BROWN PSU-J8012 L=100mm FASTON 4.8mm (RoHS) 4 17-012-3940-90 CABLE ASSY 3 WAYS #26 2.5P UL2854 L=110 VOL BD- (ROHS) J6004A/B 5 17-012-3999-90 CABLE ASSY 1 WAY AWG18 UL1007 L=100MM VOL BD-J6103A W/ HEADER (RoHS) 6 17-012-40

28、00-90 CABLE ASSY 2 WAYS AWG18 UL1007 3.96P VOL BD- L=340MM (RoHS) J1002B/J6102A 7 17-012-3938-90 CABLE ASSY 1 WAY AWG18 UL1007 L=320MM DSP BD-J1002A W/ HEADER (RoHS) 8 17-012-3971-90 CABLE ASSY 20 WAYS AWG28 UL2651 L=120mm KEY BD-J2002B PCB MOUNT (RoHS) 9 17-012-3171-90 CABLE ASSY 6 WAYS AWG26 2.5P

29、UL1533 L=160mm V6 BD-J2006B (RoHS) 10 17-012-3404-90 CABLE ASSY 6 WAYS AWG26 2.5P UL1007 L=150mm V6 BD-J2005B (RoHS) 11 17-012-3936-90 CABLE ASSY 3 WAYS AWG26 2.5P UL2854 L=310 CONN#1-J9006A (RoHS) 12 17-012-3937-90 CABLE ASSY 5 WAYS AWG26 2.5P UL2854/1533 CONN#1- L=230/320 (RoHS) J9004A/J9005A 13 1

30、7-012-3964-90 CABLE ASSY 3 WAYS AWG26 2.5P UL2854 L=230 CONN#1- (RoHS) J9008A/B 14 17-012-2924-90 CABLE ASSY 1 WAY AWG18 UL1015 BLACK MCU BD- L=260MM W/ RING TERMIMAL (RoHS) JP2004A 15 17-012-3930-90 CABLE ASSY 4 WAYS AWG26 2.5P UL1533 L=160mm MCU VD-J2008A (RoHS) 16 17-010-0122-90 FFC CABLE 17 PINS

31、 P1.25 L=360MM 15 & 16 PINS TUNER-J6003A VOID (RoHS) 17 17-012-2875-90 Cable assy 1 way AWG=16 UL 1015 Green/Yellow CHASSIS GND, L=100mm(RoHS) AC OUTLET GND 18 17-012-3938-90 CABLE ASSY 1 WAY AWG18 UL1007 L=320MM TUNER-J9104A W/ HEADER (RoHS) 19 17-012-3965-90 CABLE ASSY 3 WAYS AWG26 2.5P UL2547 L=5

32、00 TUNER-J2016A (RoHS) 20 17-012-3968-90 CABLE ASSY 1 WAY AWG18 UL1672 BLUE L=80mm J8015, J8017 (RoHS) 21 17-012-3969-90 CABLE ASSY 1 WAY AWG18 UL1672 BROWN L=80mm J8013, J8016 (RoHS) 22 17-012-3972-90 CABLE ASSY 26 WAYS AWG28 UL2651 L=450mm J2301C (RoHS) 23 17-012-4001-90 CABLE ASSY 1 WAY AWG18 UL1

33、007 L=420 TUNER- W/ HEADER (RoHS) J9101A,J9102A RadioFans.CN 收音机爱 好者资料库 11 BLOCK DIAGRAM RadioFans.CN 收音机爱 好者资料库 12 SPECIAL FUNCTION Function Keys Notes Factory 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

34、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. Check Current Video Mode Source Down + Tone Controls MIC Test Source Down + Tone Defeat VFD Test Source Down + Display PAL/NTSC Source Down + Mem

35、ory 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 fi rst. XM Signal Strength Tuner Mode for 0.5 seconds XM must be selected fi rst.

36、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. Enter Diagnostics Mode Source Down + Enter Diagnostic Mode Down Source Down + Cursor Right Diagnostic Mode Up Source Down + Cursor Left Power Off Al

37、l Zones Power Toggle or Power Off for 3 seconds RadioFans.CN 收音机爱 好者资料库 13 DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING DSP U1007 Pin 70 - Clock 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), 11.2

38、896MHz U1007 Pin 12 Left/Right clock (Analog), 48kHz U1007 Pin 12 - Left/Right clock (PCM), 44.1kHz RadioFans.CN 收音机爱 好者资料库 14 U1007 Pin 9 - Serial clock (Analog), 3.072MHz MCU U2001 Pin 12 - X2001A output, 20.000MHz HDMI U12 Pin 38 U3 output, 28.636MHz RadioFans.CN 收音机爱 好者资料库 15 U9 Pin 1 DAC_HS (OS

39、D 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 RadioFans.CN 收音机爱 好者资料库 16 U9 Pin 4 DAC_FLD (OSD On, NTSC), 30Hz U9 Pin 51 PCLK (OSD On), 27MHz U9 Pin 4 DA

40、C_FLD (OSD On, PAL), 25Hz U9 Pin 51 PCLK (OSD Off), 27MHz RadioFans.CN 收音机爱 好者资料库 17 PCB LAYOUT DSP BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 18 DSP BOARD - COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 19 KEY BOARD - COMPONENT SIDEKEY BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 20 PRE-OUT BOARD- COPPER

41、SIDE RadioFans.CN 收音机爱 好者资料库 21 PRE-OUT BOARD-COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 22 VOLUME BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 23 VOLUME BOARD - COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 24 F-VIDEO BOARD - COPPER SIDE F-VIDEO BOARD - COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 25 MAIN BOARD -COM

42、PONENT SIDE RadioFans.CN 收音机爱 好者资料库 26 MAIN BOARD -COPPER SIDE RadioFans.CN 收音机爱 好者资料库 27 TRIGGER BOARD - COMPONENT SIDE TRIGGER BOARD - COPPER SIDE RadioFans.CN 收音机爱 好者资料库 28 COMPONENT BOARD-COMPONENT SIDE COMPONENT BOARD-COPPER SIDE RadioFans.CN 收音机爱 好者资料库 29 VIDEO BOARD - COPPER SIDE VIDEO BOARD

43、- COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 30 HDMI BOARD-COPPER SIDE RadioFans.CN 收音机爱 好者资料库 31 HDMI BOARD-COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 32 CONNECTOR 1 BOARD-COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库 33 CONNECTOR 1 BOARD-COPPER SIDE RadioFans.CN 收音机爱 好者资料库 34 PSU-STD BOARD-COMPONENT SIDE RadioFans.CN 收音机爱 好者资料库