NAD T 785 Service Manual
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NAD T 785 Service Manual

Surround sound surround sound receiver receiver
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DRAFT DATE: MARCH 2010
NAD
T 785
Surround Sound
Receiver

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Summary of Contents for NAD T 785

  • Page 1 DRAFT DATE: MARCH 2010 T 785 Surround Sound Receiver...
  • Page 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 worldwide 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.

  • Page 3: Table Of Contents

    SERVICE SAFETY PRECAUTIONS 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 20-001-0078-90 FUSE TIME-LAG 10A/250VAC 5X20mm UL/CSA 5T F8001*C,CT 20-001-0078-90 FUSE TIME-LAG 10A/250VAC 5X20mm UL/CSA 5T F8002*AH 20-001-0076-90...

  • Page 4: Specifications

    SPECIFICATIONS POWER AMPLIFIER SECTION ≤ 0.1 % 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/BS) 1.46 ± 0.1 V Input Sensitivity (ref. 8 ohms, 1 kHz) ≥...
  • Page 5 DTS SECTION Output Level (Vol 0 dB) : FL/FR/C/SL/SR Track 6 1 kHz 0.5 -0.2/+0.8 W 0 ± 1.0 dB Channel Difference (FL ref) : FL/FR/C/SL/SR Track 6 1 kHz ≤ 0.08 % Harmonic Distortion (Audio Filter) : FL/FR/C/SL/SR Track 10-14 1 kHz Frequency Response (20 Hz to 20 kHz) Track 26-30...

  • Page 6: Rear Panel / Front Panel View

    REAR PANEL / FRONT PANEL VIEW REAR PANEL DIGITAL AUDIO IN/OUT 13. IR IN/OUT AUDIO/VIDEO 1~6 IN 14. HDMI FM,AM ANTENNA INPUT 7.1 CH INPUT COMPONENT IN/OUT 15. ZONE 2,3,4 XM MODULE INPUT(AH) 16. AUDIO PREOUT MP DOCK DAB MODULE INOUT(C,CT) 17.

  • Page 7: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS Remove machine screws M4.0 x 8.0 (x8 pcs) from the side panels. Remove tapping screw 3.5 x 8.0 (x4 pcs) from the back panel. Refer to Figure No. 1. Figure No. 1 Pull both sides of the TOP COVER slightly outwards and tilt approx. 35 ° and then remove in the direction as indicated.

  • Page 8: Wiring Diagram

    WIRING DIAGRAM...
  • Page 9 WIRING DIAGRAM PARTS LIST Item Database Part Number Description Remark 17-012-2965-90 CABLE ASSY 4 WAYS #26 2.5P L=400mm (RoHS) PSU BD-J8002A 17-012-3943-90 CABLE ASSY 1 WAY #16 UL1672 BLUE L=140mm PSU BD-J8011 FASTON 4.8mm (RoHS) 17-012-3944-90 CABLE ASSY 1 WAY #16 UL1672 BROWN L=140mm PSU BD-J8012 FASTON 4.8mm (RoHS) 17-012-3940-90...

  • Page 10: Block Diagram

    BLOCK DIAGRAM...

  • Page 11: Special Function

    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 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.

  • Page 12: Details & Waveforms On System Test & Debugging

    DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING U1007 Pin 17 - X1001C output, 24.576MHz U1007 Pin 70 - Clock for external memory, 100MHz U1007 Pin 2 - Master clock (Analog), 12.288MHz U1007 Pin 2 - Master clock (PCM), 11.2896MHz U1007 Pin 12 –...
  • Page 13 U1007 Pin 9 - Serial clock (Analog), 3.072MHz U2001 Pin 12 - X2001A output, 20.000MHz HDMI U12 Pin 38 – U3 output, 28.636MHz...
  • Page 14 U9 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...
  • Page 15 U9 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...
  • Page 16 ADJUSTMENT POINT DIAGRAM LEFT CHANNEL AMPLIFIER BOARD RIGHT CHANNEL AMPLIFIER BOARD ISC-L BOARD...

  • Page 17: Adjustment Points Diagram / Amplifier Adjustment

    ISC-R BOARD AMPLIFIER ADJUSTMENT Idle Current Rotate R5221 fully clockwise. Connect DC millivoltmeter to P5501 (i.e. Across half of R5228 and R5530, 0.22 Ohm resistor). Turn on the unit. Adjust R5221 for 2mV +/- 0.2mV reading on voltmeter. Leave power on for at least 5 min, and check for idle current again. Repeat for other channels.

  • Page 18: Pcb Layout

    PCB LAYOUT POWER AMPLIFIER LEFT_CH BOARD-COPPER SIDE...
  • Page 19 LEFT_CH BOARD - COMPONENT SIDE...
  • Page 20 RIGHT_CH BOARD-COPPER SIDE...
  • Page 21 RIGHT_CH BOARD-COMPONENT SIDE...
  • Page 22 DSP BOARD - COPPER SIDE...
  • Page 23 DSP BOARD - COMPONENT SIDE...
  • Page 24 KEY BOARD - COMPONENT SIDE KEY BOARD - COPPER SIDE...
  • Page 25 PRE-OUT BOARD- COPPER SIDE...
  • Page 26 PRE-OUT BOARD-COMPONENT SIDE...
  • Page 27 VOLUME BOARD - COPPER SIDE...
  • Page 28 VOLUME BOARD - COMPONENT SIDE...
  • Page 29 F-INPUT BOARD - COPPER SIDE F-INPUT BOARD - COMPONENT SIDE...
  • Page 30 MAIN BOARD -COMPONENT SIDE...
  • Page 31 TRIGGER BOARD - COMPONENT SIDE TRIGGER BOARD - COPPER SIDE...
  • Page 32 COMPONENT BOARD-COMPONENT SIDE COMPONENT BOARD-COPPER SIDE...
  • Page 33 VIDEO BOARD - COPPER SIDE VIDEO BOARD - COMPONENT SIDE...
  • Page 34 HDMI BOARD-COPPER SIDE...
  • Page 35 HDMI BOARD-COMPONENT SIDE...
  • Page 36 PSU-ISC-L BOARD-COMPONENT SIDE PSU-ISC-R BOARD-COPPER SIDE...
  • Page 37 CONNECTOR 1 BOARD-COMPONENT SIDE CONNECTOR 1 BOARD-COPPER SIDE...
  • Page 38 MCU BOARD-COMPONENT SIDE MCU BOARD-COPPER SIDE...
  • Page 39 PSU-STD BOARD-COMPONENT SIDE PSU-SECONDARY BOARD-COMPONENT SIDE...
  • Page 40 CONNECTOR-3 BOARD-COMPONENT SIDE CONNECTOR-4 BOARD-COMPONENT SIDE SPEAKER BOARD-COMPONENT SIDE...
  • Page 41 CONNECTOR-2 BOARD-COMPONENT SIDE...

  • Page 42: Schematic Diagram

    SCHEMATIC DIAGRAM POWER AMPLIFIER RIGHT-CH R5018 R5038 R5039 1/2W D5411 LL4148 Q5017 R5138 R5139 Q5006 D5412 2SD2560 R5034 LL4148 O_GND 2SB1275 C5012 Q5013 Q5008 100p 100V N.I. R5031 R5238 R5239 MMBT5401LT1 D5413 Q5007 C5019 LL4148 Q5019 2SB1275 R5043 150p MMBT5551LT1 M5405-B R5024 R5338...
  • Page 43 POWER AMPLIFIER LEFT-CH R5518 1/2W R5538 R5539 D5510 LL4148 Q5517 M5804-B ME-11-012-2H4 2SD2560 R5534 R5638 R5639 D5610 FL(B) Q5506 C5512 LL4148 O_GND J5802A 2SB1275 100p Q5513 N.I. To Speaker Out R5531 M5803-B R5738 R5739 ME-11-012-2H4 D5710 C5519 Q5519 LL4148 Q5507 FL(A) 150p Q5508...
  • Page 44 DSP-1 +3 .3 V D +3 .3 V D +3 .3 V D R 1 0 0 5 +3 .3 V D L1 0 0 1 U 1 0 1 8 -F 7 4 H C U 0 4 2 2 5 u H 4 7 k C 1 0 0 3 R 1 3 0 0...
  • Page 45 DSP-2 U 1 0 1 3 PC M 1 7 9 1 A R 1 2 7 6 1 7 9 1 _ LR C K 1 7 9 1 _ M S LR C K 7 .5 k R 1 2 8 2 R 1 0 9 5 1 7 9 1 _ B C K C 1 1 7 9...
  • Page 46 DSP-3 R 1 1 8 9 N .I. +1 2 V _ A U 1 0 2 3 -A U 1 0 3 4 C 1 2 6 4 N JM 5 5 3 2 M LM 1 1 1 7 - 5 .0 1 0 u 1 6 V R 1 1 8 8 1 0 k Q 1 0 2 0 2 S C 4 6 9 5...
  • Page 47 CONNECTOR-3...
  • Page 48 KEYBOARD +5 V _ K +5 V _ K V D2 2 0 1 R 2 2 3 0 R 2 2 3 1 1 0 k 1 0 k M 2 2 0 1 V F D-1 6 -B T-1 3 0 G IN K E C 1 6 2 1 0 2 F 2 B -H A 1 -0 0 2 R 2 2 3 2 1 0 0 +5 V _ K...
  • Page 49 PRE-OUT-1 C6901 +10.5V +10.5V R6901 1k 22u 16V FRONT L C6903 R6905 100p R6971 0 C6941 C6943 M6501-C C6945 C6947 0.1u U6501-C U6601-C 0.1u R6906 R6902 1k NJM5532M NJM5532M C6904 FRONT R 100p C6942 C6944 C6946 C6948 C6902 0.1u 0.1u 22u 16V AGND AGND...
  • Page 50 PRE-OUT-2 FOR T175: ALL N.I. R6551 R6528 R6529 R6533 R6523 U6502-A C6518 470 1/16W 470 1/16W C6521 220 1/16W N.I. PO_FL -10.5V 22u 16V R6524 Q6507 C6516 C6517 220p 2SC4695 FRONT L 1/16W Q6506 N.I. 50V 2SC4695 R6526 R6531 R6532 R6525 N.I.
  • Page 51 VOLUME-1 J6001A To Conn#1 J6001B DSP_FL U6018-B DSP_FR NJM5532M AGND DSP_SL C6019 DSP_SR C6001 R6101 22u 16V 100p C6085 0.01u AUDIO 6 L +5V_K DSP_SBL R6137 R6163 M6001-A R6165 33k C6002 DSP_SBR R6138 100p R6102 R6164 AUDIO 6 R R6166 C6020 DSP_SUBW C6103...
  • Page 52 VOLUME-2 +10.5V -10.5V C6141 C6140 0.1u C6139 C6137 0.1u AGND AGND U6008 TPA6120A2 R6242 R6243 U6010-A 1 LVCC- RVCC- C6146 N.I. C6149 R6004 R6008 R6009 C6153 PO_Z2L R6012 C6266 C6258 Z2_L R6100 10u16V 2 LOUT ROUT HP_R 470 1/16W 220 1/16W N.I.16V 1k 1/16W 22u 16V...
  • Page 53 F-INPUT +5V_V6 M9301 R9301 4.7 FRONT C9301 0.1uF C9302 OPTICAL INPUT 2.2uF -12V_A +12V_A +5V_V6 +5V_V6 +5V_V6 MIC_BIAS: DGND_V M9302 C9320 H: MP3 22u 16V J-TR-ST03007 R9329 0 R9312 N.I. L: MIC C9318 R9334 R9330 Q9301 R9311 100p MIC/MP IN N.I.
  • Page 54 MAIN BOARD TO Conn#1 J7007B TO Conn#1 J7006B J7007A J7006A D7001 RS605 +5V_DSP 600V 6A U7001 C7019 C7018 C7029 C7028 7805 C7020 C7021 2200u 0.1u 1000u 0.1u 4700u 0.1u +5.3V DGND +8V_V U7007 D7005 LM317 D7002 RS605 +5V_V 600V 6A R7002 U7002 C7022...
  • Page 55 POWER SUPPLY(STAND BY) J8002A M8001 M8004 T8001 To CONN#2 J8002B JP8001 TO XFORMER TO XFORMER R8003 +13V TO5382B N.I. 0.22 1/2W POWER_ON (Fusible) +12.3V D8002 M8002-A D8003 1N4007 DGND 1N4007 JP8002 D8005 C8003 C8001 JUMPER TO POWER SWITCH R8001 D8001 C8002 1N4007 0.022u...
  • Page 56 TRIGGER +5.3V +5V_V D2308 N.I. FOR CE U2302 R2356 R2357 TPS2011A N.I. OUT8 D2308 CM1213-08MS OUT7 +5V_K OUT6 OUT5 C2329 +3.3V C2326 C2327 0.1u 0.1u +3.3V R2347 N.I. DGND DGND DGND DGND DAB_TXD M2307 R2329 N.I. FOR CE N.I. R2331 R2332 Q2316 +5V_OUT...
  • Page 57 COMPONENT VIDEO +5V_V C4011 U4002 74HC4052 C4009 2.2u 50V R4011 DVR IN Y 0.1u 1 Y0 +5V_V VGND M4011-A 2 Y2 R4012 SAT IN Y +5V_V C4001 C4012 0.1u U4001 C4002 2.2u 50V J4001A BA7660FS 2.2u 4 Y3 C4013 To Conn#1 J4001B VGND 16 VCC MUTE...
  • Page 58 VIDEO C4121 R4127 2.2u 50V M4101 VIDEO 1 IN 1/16W VGND C4122 2.2u 50V R4128 CV_GND 1/16W SV_G VGND +5V_V C4123 Q4102 2SC4695 C4117 C4118 M4102 2.2u 50V +5V_V R4129 0.1u U4103 VIDEO 2 IN 1/16W +5V_V +5V_V R4132 74HC4051 VGND C4124 R4121...
  • Page 59 HDMI-1 J1 0 4 6 pin V D1 8 V D3 3 O _ I2 S 2 O _ I2 S 0 O _ I2 S 3 S DA _ 7 4 0 3 O _ I2 S 1 B K G 2 1 1 A V P2 S C L_ 7 4 0 3...
  • Page 60 HDMI-2 V D3 3 C on n ector H DM I 1 9 pin C on n ector H DM I 1 9 pin J1 3 IN 4 O U T IN 1 _ D0 + TX _ D0 + 7 D0 + D0 + IN 1 _ D0 -...
  • Page 61 HDMI-3 F or U 2 8 - A DV 7 3 2 0 F or U 3 1 - A D9 3 8 9 V D3 3 V D2 5 V A 2 5 V D1 8 V A 1 8 V A 1 8 C 5 1 C 5 4...
  • Page 62 POWER SUPPLY(ISC-L) J5803B To AMP-L J5803A ISC_THM_L DGND_L ISC_SEN_L ISC FOR LEFT AMP V+_L U8201-B DGND_L NJM5532 +12V_L R8222 +12V_L R8204 C8208 D8207 C8205 R8211 D8204 R8224 100k 0.1u 1N4148 4.7k R8208 1/2W R8205 100k U8201-A NJM5532 U8201-C NJM5532 R8206 R8207 2.2k 2.2k...
  • Page 63 POWER SUPPLY(ISC-R) V+_R +12V_R R8322 C8308 D8304 1/2W ISC FOR RIGHT AMP U8301-C NJM5532 D8305 C8309 DGND_R 1/2W R8323 +12V_R -12V_R D8307 R8304 C8305 R8311 0.1u 1N4148 V-_R R8324 J5810B R8308 4.7k 100k U8301-A To AMP-L (J5810A) NJM5532 ISC_THM_R R8305 R8306 100k DGND_R...
  • Page 64 POWER SUPPLY(SECONDARY) J5402B TO AMP-R (J5402A) J8103A C8101 V+_R J8108 J8107 12000u To ISC_R J8103B V-_R Jumper Wire AGND V+_R CHGND J8101A To SPEAKER V-_R C8102 12000u AC_L1_R GROUND CONNECTION AC_L2_R FOR FR/SR/BSR/C DC+_R AGND J5804B TO AMP-L (J5804A) C8103 12000u V+_L J8110...
  • Page 65 +5V_K +5V_K R2032 R2034 2.2k 2.2k 4094(1)_CLK_AMP 4094(1)_DATA_AMP J2005A J2006A J2008A J2002A J2001A 4094(1)_CLK DTA114EKA 4094(1)_DATA DTA114EKA To Front Input J2005B To Front Input J2006B TO FRONT INPUT J2008B To Keyboard J2002B To Right Amp J2001B +5V_K +5V_K Q2002 Q2004 +5V_K +39V AC4.8V1 AC4.8V2 +5V_K...
  • Page 66 CONNECTOR-1 TO DSP TO DSP TO PRE-OUT J1101B J1102B J6501B to DSP (J1101A) to DSP (J1102A) To Pre-Out (J6501A) J7006B TO MAIN(J7006A) +5V_DSP TO VOLUME +5V_DSP DGND DGND +8V_V TO MAIN +8V_V +8V_V +8V_V +5V_V +5V_V DGND_V DGND_V J6001B to VOLUME (J6001A) DSP_FL DSP_FL J7007B...
  • Page 67 CONNECTOR-2...
  • Page 68 CONNECTOR-4...
  • Page 69 SPEAKER...

  • Page 70: Electrical Parts List

    ELECTRICAL PARTS LIST POWER AMP MODULE ***SEE PAGE 127 FOR SINGLE CHANNEL SERVICE KIT # 52-940-0785-90 PCB ASSEMBLY 50-940-0785-90 T785 PWR AMP MODULE MAIN BOARD PCB ASSEMBLY 50-901-0765-90 T765/T775/T785 AH MAIN ASSY REGULATORS U7001-7002,U7004 01-004-0048-00 IC VOLT REG 5V 1A TO-220 NJM7805FA U7003,U7005 01-004-0049-00 IC VOLT REG 12V 1A TO-220 NJM7812...
  • Page 71 R8006 02-004-0016-90 NTC SL32-1R030 30A/265V CAPACITORS C8002 03-002-0148-00 CAP ELEC SS 4.7uF 50V 20% 85C C8001 03-004-0115-00 CAP MpF 0.001uF 63V 5% DMF 5 SERIES C8006 03-007-0014-00 HC CER CAP 0.01uF/250VAC ±20% UL/CSA/VDE DIODES D8001-8006 04-001-0003-00 Diode 1N4007 DO-41 1A/1000V TRANSISTORS Q8001 05-001-0072-00...
  • Page 72 CAPACITORS C5018 C5118 C5218 C5318 03-004-0031-00 MPF CAP 104J/63V 5% Mini Box TRANSISTORS Q5018 Q5118 Q5218 Q5318 05-001-0102-90 TRANSISTOR PW DARLINGTON PNP 15A/150V TO-3PB 2SB1647 Q5017 Q5117 Q5217 Q5317 05-001-0103-90 TRANSISTOR PW DARLINGTON NPN 15A/150V TO-3PB 2SD2560 VARIABLE RESISTORS R5021 R5121 R5221 R5321 06-004-0016-90 VR SEMI-FIX RES CF 1K OHM B 30% COILS...
  • Page 73 R5004 R5104 R5204 R5304 02-007-0318-00 RES SMD 27K OHM 5% 1/4W 1206 R5035 R5135 R5235 R5335 02-007-0323-00 RES SMD 3.3 OHM 5% 1W 2512 R5012 R5112 R5212 R5312 02-007-0324-00 RES SMD 360 OHM 5% 1/4W 1206 R5418 02-007-0325-00 RES SMD 4.22K OHM 1% 1/10W 0805 R5002 R5102 R5202 R5302 02-007-0327-00 RES SMD 470 OHM 5% 1/4W 1206...
  • Page 74 Q5008 Q5108 Q5208 Q5308 Q5408 05-004-0019-00 SMD Transistor MMBT5401LT1G Q5406 PNPCAP ELEC SMD SOT-23 Q5010 Q5110 Q5210 Q5310 05-004-0030-90 XTR 2SD1918 NPN POWER 160V/1.5A 80MHz HFE 120-390 SMD Q5006 Q5007 Q5009 Q5106 Q5107 05-004-0031-90 XTR 2SB1275 PNP POWER 160V/1.5A Q5109 Q5206 Q5207 Q5209 Q5306 50MHz HFE 82-180 SMD Q5307 Q5309 Q5410...
  • Page 75 RES SMDESISTORS R5506 R5606 R5706 R5803 R5825 02-007-0026-00 RES SMD 47K OHM 5% 1/10W 0805 R5826 02-007-0028-00 RES SMD 4.7K OHM 5% 1/10W 0805 R5808 R5811 R5816 R5818 02-007-0033-00 RES SMD 1.2K OHM 5% 1/10W 0805 R5519 R5619 R5719 02-007-0035-00 RES SMD 2K OHM +/-5% 1/10W 0805 R5537 R5637 R5737 02-007-0037-00...
  • Page 76 C5509 C5511 C5609 C5611 03-009-0145-00 CAP ELEC SMD 47uF 100V +/-20% C5709 C5711 C5810 10X10 C5816 03-009-0153-00 CAP ELEC SMD 1uF/50V ±20% B CASE 4 X 5.4 C5801 03-009-0211-00 CAP ELEC SMD 220uF/16V ±20% 6.3X7.7 SMD DIODES D5502, D5503, D5602, D5603,D5702, 04-006-0019-00 SMD Diode RECT 1A/400V DO-214AC D5703, D5809 D5810 D5811 D5812...
  • Page 77 U6004-6007 U6018 01-014-0041-00 IC AUDIO LOW NOISE OP-AMP SMD NJM5532M U6008 01-014-0051-90 IC TPA6120A2DWP HIGH FIDELITY HEADPHONE AMPLIIER 20 PINS SOIC U6001-6002 01-027-0012-90 IC R2S15205FP 8 CH ELECTRONIC VOLUME W/ INPUT SWITCH & TONE CTRL SMD 80 PINS QFP RES SMDESISTORS R6040 R6016 R6052 R6064 R6028 02-007-0042-00 RES SMD 1K OHM 0603 5%...
  • Page 78 C6115 C6121 C6097 C6101 C6103 03-009-0075-00 CAP CER SMD 0.1uF 50V 20% Y5V 0603 C6139 C6141 C6144-6145 C6151-6152 C6159-6160 C6167-6168 C6175-6176 C6183-6184 C6192-6193 C6198-6199 C6201-6202C6221-6222 C6225-6226 C6229-6230 C6233-6234 C6241-6242 C6237-6238 C6267 C6269 C6001-6018 C6124 C6127 03-009-0111-00 CAP CER SMD 100pF 50V 10% X7R C6130-6132 C6135 C6265 0603 C6243...
  • Page 79 INDUCTORS L1008-L1014 07-002-0132-90 IND CHOKE 10uH +/-10% AXIAL EC24- 100K L1007 07-002-0134-90 IND CHOKE 22uH 10% AXIAL EC24- 220K TACT SWITCH S1001 11-007-0061-90 SW TACT 1P1T 50mA/12V VER H=5mm RCA JACKS M1005 M1006 M1007 M1008 15-003-0034-90 RCA JACK 1 ORANGE PCB MOUNT GOLD W/SHIELD SMD ICS U1020...
  • Page 80 R1062 R1069 R1240 R1244-1245*AH 02-007-0141-00 RES SMD 100 OHM 0603 5% R1028 02-007-0146-00 RES SMD 47 OHM 0603 5% R1078-1079 R1082-1083 R1086-1087 02-007-0151-00 RES SMD 10 OHM 0603 5% R1090-1091 R1167-1168 R1226 R1190 R1199 R1208 R1050 02-007-0153-00 RES SMD 20K OHM 0603 5% R1066 R1077 R1080-1081 R1084-1085 02-007-0157-00 RES SMD 10K OHM 0603 1%...
  • Page 81 SMD CAPACITORS C1003 C1007 C1011 C1013 C1015 03-009-0075-00 CAP CER SMD 0.1uF 50V 20% Y5V 0603 C1017 C1019 C1023 C1025 C1026*C,CT C1028 C1030 C1032 C1035-1037 C1047 C1049 C1051 C1053 C1056 C1062 C1064 C1067-1068 C1070 C1077 C1079-1124 C1127-1131 C1134-1136 C1154-1155 C1159-1160 C1164-1165 C1169 C1171 C1243-1244 C1288 C1293 C1296 C1299 C1303-1305*AH C1311*AH C1313 C1315-1322*AH C1330*AH C1341...
  • Page 82 C1268 C1273 03-009-0211-00 CAP ELEC SMD 220uF/16V ±20% 6.3X7.7 SMD DIODES D4001 D4002 04-006-0021-90 SMD DIODE LL4148 SOD80 SMD TRANSISTORS Q1016 05-001-0096-90 XTR PW PNP 5A/60V SC-63 2SA1952TLQ Q1020-1022 05-004-0017-00 SMD Transistor 2SC4695 NPN SOT-23 Q1011-1012 Q1024 Q1030 Q1032-1033 05-004-0035-90 TRANSISTOR SS NPN HFE30 250MHz SPT DTC114EKAT146 Q1017*C,CT Q1025 Q1031 Q1034-1035...
  • Page 83 SMD CAPACITORS C4118 C4120 C4135 C4138 C4153 03-009-0075-00 CAP CER SMD 0.1uF 50V 20% Y5V 0603 C4142-4143 03-009-0113-00 CAP CER SMD 10nF 50V 10% X7R 0603 C4152 03-009-0136-00 CAP ELEC SMD 10uF 16V +/-20% 4X5.4 C4132 03-009-0138-00 CAP ELEC SMD 1000uF 10V +/-20% 10x10.5 C4101-4107 C4109-4111 C4113-4115 03-009-0141-00...
  • Page 84 RES SMDESISTORS R2201 R2237-R2239 02-007-0042-00 RES SMD 1K OHM 0603 5% R2204 02-007-0136-00 RES SMD 33K OHM 0603 5% R2202 02-007-0139-00 RES SMD 4.7K OHM 0603 5% R2232-2233 02-007-0141-00 RES SMD 100 OHM 0603 5% R2210 02-007-0151-00 RES SMD 10 OHM 0603 5% R2207 R2212-2216 R2230-2231 02-007-0157-00 RES SMD 10K OHM 0603 1%...
  • Page 85 R6971-6979 02-007-0089-00 RES SMD 0 OHM 1/8W 0805 5% R6924 R6917-6918 R6905-6906 02-007-0136-00 RES SMD 33K OHM 0603 5% R6911-6912 R6923 R6502 R6602 R6702 R6802 R6513 02-007-0140-00 RES SMD 47K OHM 0603 5% R6613 R6713 R6813 R6524 R6624 R6724 R6824 R6535 R6635 R6735 R6632 R6531-6532 R6642-6643 R6647 02-007-0267-00 RES SMD 100K OHM 5% 1/16W 0603...
  • Page 86 C6980-6985 03-009-0138-00 CAP ELEC SMD 1000uF 10V +/-20% 10x10.5 C6506 C6713 C6812-6813 C6605 03-009-0139-00 CAP ELEC SMD 0.1uF 50V +/-20% 4X5.4 C6505 C6513 C6612 C6705-6706 C6613 C6512 C6606 C6805-6806 C6712 C6941-6942 C6945-6946 C6949-6950 C6953-6954 C6528 C6507 C6604 C6607 C6504 03-009-0140-00 CAP ELEC SMD 22uF 16V +/-20% 5X5.4 C6611 C6614 C6511 C6618 C6621 C6625 C6628 C6704 C6707 C6514...
  • Page 87 D8306 D8307 04-001-0001-00 Diode 1N4148 DO-35 0.15A/100V Signal Switching Diode D8304 D8305 04-002-0049-90 DIODE ZENER BZX85 12V 1/2W 5% DO35 BZX55-C12V JUMPER BARS JP8101 JP8102 JP8103 JP8104 17-016-0044-00 Jumper Bar DIA1.5 X 30 JP8201-JP8205 JP8301-JP8305 JUMPERS JMP1-2 JMP14-15 17-016-0077-00 Jumper wire Dia. 0.5mm L=52.0mm JMP22 JMP34 JMP3-13 JMP16-17 17-016-0080-90...
  • Page 88 SLIDE SWITCHES S2301-S2302 11-002-0042-90 SW SLIDE 2P2T RIGHT L=9 JACKS M2301-M2304 15-002-0030-90 PHONE JACK X2 BLACK PCB MOUNT 3.5mm RIGHT ANGLE SCJ351P00XS0B00G M2306*C,CT 15-017-0003-90 DIN MINI JACK BLACK PCB MOUNT W/COVER RIGHT ANGLE 9 PINS XM CONNECTOR M2307*AH 16-001-0440-90 XM 4 PINS SMALL CONNECTOR B TYPE 2.4mm PCB MOUNT DAB CONNECTOR M2306*C,CT...
  • Page 89 SMD CAPACITORS C2305-2308 C2310*C,CT 03-009-0075-00 CAP CER SMD 0.1uF 50V 20% Y5V 0603 C2315 C2326-2327 C2302-2304 03-009-0078-00 CAP CER SMD 47pF/50V 10% NPO 0603 C2317 03-009-0111-00 CAP CER SMD 100pF 50V 10% X7R 0603 C2301 03-009-0113-00 CAP CER SMD 10nF 50V 10% X7R 0603 SMD DIODES D2301-2306 D2307*C,CT 04-006-0021-90...
  • Page 90 RES SMDESISTORS R9333 02-007-0042-00 RES SMD 1K OHM 0603 5% R9301 02-007-0134-00 RES SMD 4.7 OHM 0805 5% R9307 R9310 R9311 R9330-9332 02-007-0136-00 RES SMD 33K OHM 0603 5% R9320 R9323 R9327 02-007-0139-00 RES SMD 4.7K OHM 0603 5% R9313 02-007-0143-00 RES SMD 18K OHM 0603 5% R9319 R9326...
  • Page 91 SMD CAPACITORS C4001 C4009-4010 03-009-0075-00 CAP CER SMD 0.1uF 50V 20% Y5V 0603 C4006-4008 03-009-0136-00 CAP ELEC SMD 10uF 16V +/-20% 4X5.4 C4003-4005 03-009-0138-00 CAP ELEC SMD 1000uF 10V +/-20% 10x10.5 C4002 C4011-4019 03-009-0141-00 CAP ELEC SMD 2.2uF 50V +/-20% 4x5.4 HMDI BOARD PCB ASSEMBLY 50-933-0775-90...
  • Page 92 01-030-0007-90 IC LM2575S-3.3 1A STEP-DOWN VOLTAGE REGULATOR SMD 5 PIN TO-263 VR2 U7 01-030-0008-90 IC VOLT REG. LOW DROPOUT 2.5V 1A SOT-223 LM1117S-2.5 VR200 01-030-0009-90 IC LM1086CS-3.3 3.3V 1.5A LDO VOLTAGE REGULATOR SMD 3 PIN TO-263 RES SMDESISTORS RN1 RN2 RN3 RN4 RN5 RN6 RN7 02-003-0060-00 RES NETWORK 22 OHM X 8 5% 0.063W RN8 RN9 RN10 RN1 RN12 RN13...
  • Page 93 C11 C12 C20 C51 C54 C59 C65 C77 03-009-0126-00 CAP CER SMD 10nF 50V 10% X7R 0805 C92-C94 C132-C136 C140 C142 C143 C145 C149 C153 C154 C157 C158 C201-C203 C216-C223 C238 C2 C3 C15 C16 C235 C237 03-009-0127-00 CAP CER SMD 1uF 16V +80/-20% Y5V 0805 C36 C40 C45 C224 C225 03-009-0132-00...
  • Page 94 U2006 01-008-0007-90 IC MICROPOWER UP WATCH DOG TIMER 2.93V SOT-25 AME8530AEEVEFX29Z U2001 01-010-0025-90 IC M30280FCHP-U3 16-BIT MCU 128K ROM 12K RAM QFP 80P6Q-A U2007 01-010-0030-90 IC MCU 8 BITS 8K ROM 512 BYTES RAM TQFP ATMega48-20 U2002 01-011-0034-90 IC LE030401 AT24C16-AN-2.7 ATMEL U2009 01-012-0059-00 IC LOGIC QUAD 2-INPUT NAND GATE...
  • Page 95 CONNECTOR #2 BOARD PCB ASSEMBLY 50-942-0775-90 T775/T785 CONNECTION # 2 ASSY CONNECTOR #3 BOARD PCB ASSEMBLY 50-943-0765-90 T765/T775/T785 CONNECTION # 3 ASSY CONNECTOR #4 BOARD PCB ASSEMBLY 50-944-0775-90 T775/T785 CONNECTION # 4 ASSY...

  • Page 96: Ic Block Diagram

    IC BLOCK DIAGRAM MAINBOARD LM1117 (U1020 in DSP, U2008 in MCU, VR201, VR2, VR6, U7 in HDMI, U1034 in DSP) AME8530 U2006 M30280 (U2001)
  • Page 97 ATMEGA48-20 (U2007) AT24C16 (U2002)
  • Page 98 74HC00D (U2009) HEF4094BT (U2201, U4107 in Composite, U1007, U1008 in DSP, U6901 in Pre-Out, U5501 in AMP-L, U6003 in Volume) 74HC132 (U2005)
  • Page 99 D708E0001BRFP266 (U1001) SST39VF800 (U1004)
  • Page 100 K4S641632K (U1003) 74HC251D (U1005)
  • Page 101 74HCU04D (U1018, U1019) SN74LVC245 (U1010, U1022) TL5001CD (U1011)
  • Page 102 SN74HCT245 (U1009) SN74LVC257AD (U1033, U1035, U1036)
  • Page 103 NJM5532M (U1023, U1027-1031, U9301 in F-input, U8201 in ISC-L, U8301 in ISC-R, U6501, U6601, U6701, U6801 in Pre-Out, U6004-6007, U6018 in Volume) PCM1802 (U1017)
  • Page 104 TPS3103 (U1021) CS8416 (U1002)
  • Page 105 BU9450 (U1032) PCM1791A (U1012-1016)
  • Page 106 HDMI XC9572XL (U20) CM1213-8 (U2, U11, U16, U24, U32, D2308 in Trigger)
  • Page 107 PCA9517 (U5) PCF8574 (U10, U201)
  • Page 108 PI3B16233 (U9, U13) SN74AHCT244 (U200)
  • Page 109 AD8061 (U18, U22, U26) AD8063 (U17, U21, U25, U27, U29, U30)
  • Page 110 MC141585DW (U19)
  • Page 111 TMDS341 (U15, U23)
  • Page 112 ADV7320 (U28)
  • Page 113 ADV7403 (U12) AD9388 (U14)
  • Page 114 AD9389B (U31) LM2575 (VR3, VR4)
  • Page 115 LM1086 (VR200) Power Amp – L AS358 (U5802, U5401 in AMP-R)
  • Page 116 LM35DT (U5803, U5402 in AMP-R) Composite / S-Video 74HC4051D (U4103-4106) BA7660FS (U4101-4102, U4001 in Component)
  • Page 117 Component 74HC4052D (U4002-4003) LC78211 (U6009)
  • Page 118 Volume TPA6120A2DWP (U6008)
  • Page 119 R2S15205FP (U6001-6002)
  • Page 120 Trigger 74HC86D (U2303) ST232BDR (U2301) TPS2011A (U2302)
  • Page 121 EXPLODED VIEW - A...

  • Page 122: Exploded View

    EXPLODED VIEW - B...

  • Page 123: Exploded View Parts List

    EXPLODED VIEW PARTS LIST ITEM PART NO. DESC. 08-002-0067-90 FAN DC 60x20mm 12V 0.18A 3800RPM DF126020SL 2 L=430mm w/ 2.5P CONNECTOR (RoHS) 08-002-0068-90 FAN DC 60x20mm 12V 0.18A 3800RPM DF126020SL 3 L=330mm w/ 2.5P CONNECTOR (RoHS) 10-005-0222-90 TRANSFORMER PW TOROIDAL 120V T785 UL TI-053904 (RoHS) [FOR 120V VERSION] 10-005-0224-90 TRANSFORMER PW TOROIDAL 230V T785 CE...
  • Page 124 23-232-0010-93 BOTTOM CABINET T775 (RoHS) R2 23-236-0017-90 TOP COVER T785 (PAINTED PPG GREY) (RoHS) [FOR GRAPHITE VERSION] 23-236-0018-90 TOP COVER T785 (PAINTED NAD SILVER) (RoHS) [FOR TITANIUM VERSION] 23-237-0015-90 PANEL - SVIDEO T775 (RoHS) 23-237-0016-90 PANEL - VOLUME T775 (RoHS)
  • Page 125 REAR HTSK SUPPORT BRACKET (RoHS) 25-022-1250-90 HTSK HANDLE PLATE (RoHS) 25-022-1363-92 TRANSFORMER BRACKET T772 R.2 (RoHS) 25-022-1402-90 SIDE CAP - L T785 (PAINTED NAD GREY) (RoHS) [FOR GRAPHITE VERSION] 25-022-1404-90 SIDE CAP - L T785 (PAINTED TITANIUM) (RoHS) [FOR TITANIUM VERSION] 25-022-1403-90...
  • Page 126 25-024-0322-90 DUAL BUTTON T765 GRAPHITE (RoHS) [FOR GRAPHITE VERSION] 25-024-0323-90 DUAL BUTTON T765 TITANIUM (RoHS) [FOR TITANIUM VERSION] 25-024-0324-90 VIDEO COVER T765 GRAPHITE (RoHS) [FOR GRAPHITE VERSION] 25-024-0325-90 VIDEO COVER T765 TITANIUM (RoHS) [FOR TITANIUM VERSION] 25-024-0326-90 RUBBER BRACKET T765 (MOLD BLACK) (RoHS) 25-024-0330-90 FAN RUBBER (RoHS) 16-004-0888-90...

  • Page 127: Single Channel Service Kit

    Enlarged in detail on next page...
  • Page 128 T785 Power amplifier components (single channel) Part Number Description 02-005-0063-90 RES WW 0.22 OHM 5% 5W 02-007-0328-90 RES SMD 47 OHM 5% 1/2W 2010 TAPE(RoHS) 03-009-0137-90 CAP ELEC SMD 100uF 50V +/-20% 03-009-0141-90 CAP ELEC SMD 2.2uF 50V +/-20% 03-009-0144-90 CAP ELEC SMD 470uF 16V +/-20% 03-009-0145-90 CAP ELEC SMD 47uF 100V +/-20% 04-006-0021-90 SMD DIODE LL4148 SOD80 Components in the red boxes are...

  • Page 129: Packing Diagram

    24-004-2094-90 T785 OWNER’S MANUAL GB/F/D/NL W/WEEE(ROHS) 24-004-2095-90 T785 OWNER’S MANUAL E/P/I/S W/WEEE(ROHS) 24-004-2226-90 T785 QUICK START MANUAL A3 SIZE (RoHS) 28-008-0003-90 REMOTE CONTROLLER NAD HTRC1 (RoHS) 24-006-0808-90 POLYFOAM TOP/BOTTOM T785(ROHS) 24-003-0154-90 POLYBAG MAIN UNIT (RoHS) 24-003-0143-90 PROTECTIVE COVER (RoHS) 24-005-0890-90...
  • Page 130 NAD ELECTRONICS LTD LONDON...

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