NAD T 763 Service Manual
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NAD T 763 Service Manual

NAD T 763 Service Manual

Surround sound receiver
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DRAFT DATE: 06 FEB 2004
NAD
T 763
Surround Sound Receiver

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Summary of Contents for NAD T 763

  • Page 1 DRAFT DATE: 06 FEB 2004 T 763 Surround Sound Receiver...

  • Page 2: Safety Information

    SAFETY INFORMATION AH VERSION C VERSION...

  • 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 Part Number Description F751*AH 33-0191001-00-88 FUSE 10A/250VAC TIME-LAG 5X20mm 5T UL/CSA F751*C 33-0181006-00-88 FUSE 6.3A/250VAC TIME-LAG 5X20mm 5T VDE/UL/CSA F752*AH 33-0111006-00-88...

  • 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) Input Sensitivity (ref. 8 ohms, 1 kHz) 157 ±...

  • Page 5: Specifications

    DTS SECTION Output Level (Vol 0 dB) : FL/FR/C/SL/SR Track 6 1 kHz 0.3 ± 1.3 W Channel Difference (FL ref) : FL/FR/C/SL/SR Track 6 1 kHz ± 1.0 dB ≤ ≤ ≤ ≤ ≤ 0.08 % Harmonic Distortion (Audio Filter) : FL/FR/C/SL/SR Track 10-14 1 kHz Frequency Response (20 Hz to 20 kHz)

  • Page 6: Rear Panel / Front Panel View

    REAR PANEL / FRONT PANEL VIEW REAR PANEL T 763 (AH) NORTH AMERICA T 763 (C) EUROPEAN VERSION FM & AM ANTENNA 10. DIGITAL AUDIO INPUT & DIGITAL AUDIO OUTPUT MAIN IN / AUDIO PRE-OUTS / SUBWOOFER OUT RS-232 SOFT CLIPPING ON/OFF 12.

  • Page 7: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 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. Figure No. 1 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.

  • Page 8: Wiring Diagram

    WIRING DIAGRAM...

  • Page 9: Block Diagram

    BLOCK DIAGRAM...

  • Page 10: Special Function

    SPECIAL FUNCTION FEATURE KEYS PRESS ON FRONT PANEL RESET FOR AH VERSION VIDEO + TONE DEFEAT RESET FOR C VERSION VIDEO + TONE CONTROLS NTSC / PAL SELECTION VIDEO + MEMORY VFD ALL DISPLAY AUDIO + TAPE MONITOR AM FREQ. STEP AM/FM + FM MUTE DETAILS &...

  • Page 11: Adjustment Points Diagram / Amplifier Adjustment

    ADJUSTMENT POINT DIAGRAM FRONT/CENTER AMPLIFIER BOARD R522 R545 R571 P501 P502 P503 SURROUND AMPLIFIER BOARD R835 R836 R897 P801 P802 P803 ISC BOARD R834 R881 AMPLIFIER ADJUSTMENT Idle Current Rotate R522 fully clockwise. Connect DC millivoltmeter to P501 (i.e. Across half of R523, 0.22 Ohm resistor). Turn on the unit.

  • Page 12: Pcb Layout

    PCB LAYOUT AUDIO BOARD COMPOSITE VIDEO BOARD...
  • Page 13 COMPONENT VIDEO BOARD - COMPONENT SIDE COMPONENT VIDEO BOARD - COPPER SIDE DIGITAL BOARD - COMPONENT SIDE DIGITAL BOARD - COPPER SIDE...
  • Page 14 DSP BOARD - COMPONENT SIDE DSP BOARD - COPPER SIDE...
  • Page 15 FRONT/CENTER AMPLIFIER BOARD - COMPONENT SIDE...
  • Page 16 FRONT/CENTER AMPLIFIER BOARD - COPPER SIDE...
  • Page 17 SURROUND AMPLIFIER BOARD - COMPONENT SIDE...
  • Page 18 SURROUND AMPLIFIER BOARD - COPPER SIDE...
  • Page 19 KEY BOARD / LED BOARD KEY BOARD / LED BOARD - COMPONENT SIDE - COPPER SIDE...
  • Page 20 MAIN BOARD...
  • Page 21 MULTI-CHANNEL BOARD - COMPONENT SIDE MULTI-CHANNEL BOARD - COPPER SIDE...
  • Page 22 POWER SUPPLY (STANDBY) ISC BOARD ISC BOARD - COPPER SIDE - COMPONENT SIDE...
  • Page 23 PRE-OUT BOARD - COMPONENT SIDE PRE-OUT BOARD - COPPER SIDE RS-232 BOARD - COPPER SIDE - COMPONENT SIDE...
  • Page 24 VIDEO 6 BOARD POWER SWITCH / TRIGGER BOARD SPEAKER TERMINAL BOARD SECONDARY BOARD...
  • Page 25 S-VIDEO BOARD...

  • Page 26: Schematic Diagram

    SCHEMATIC DIAGRAM AUDIO SWITCH...
  • Page 27 COMPONENT VIDEO...
  • Page 28 COMPOSITE VIDEO...
  • Page 30 POWER SUPPLY (SECONDARY)
  • Page 31 POWER SUPPLY (STAND BY)
  • Page 32 TRIGGER...
  • Page 33 VIDEO 6...
  • Page 34 S-VIDEO...
  • Page 35 FRONT / CENTER AMPLIFIER...
  • Page 36 SURROUND / BACK SURROUND AMPLIFIER...
  • Page 37 SPEAKER A & B RS-232 NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%.
  • Page 38 DIGITAL IN & OUT...
  • Page 39 MAIN BOARD SS8050 E B C NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%.
  • Page 40 PRE-OUT DTA114ESA RN1241 E C B E C B NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%.
  • Page 41 2SC1815 E C B NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%.
  • Page 42 KEYBOARD 2SC1815 E C B NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 5%.
  • Page 43 MULTI-CH SS8050 DTC144ESA SS8550 DTA144ESA 2SC2878 E B C E C B E C B RESISTORS : UNLESS OTHERWISE SPECIFIED ARE CARBON FILM. NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%.

  • Page 44: Ic Block Diagram

    IC BLOCK DIAGRAM 74LVC245 74LVQ574 DSP BOARD: U1002, U1003, U1014 DSP BOARD: U1008, U1009 74VHC245 KEYBOARD: U209 (11) (19) (18) (17) (16) (15) (14) (13) (12) W27C020 NJM5532 DSP BOARD: U1007 DSP BOARD: U1010~U1013, U1023 & U1028 MULTI-CHANNEL: U6104~U6107 PRE-OUT BOARD: U609~U613 OUTPUT CONTROL ISC BOARD: U801...
  • Page 45 CS4392 DSP BOARD: U1025 CS49326 DSP BOARD: U1001 CS8415A DSP BOARD: U1005...
  • Page 46 CS5333KZ DSP BOARD: U1027 74HCU04 DIGITAL BOARD: U1201 & U1202 74HC251 PIN7 STROBE DIGITAL BOARD: U1203 PIN4 D0 W PIN6 PIN3 D1 PIN2 D2 PIN1 D3 PIN15 D4 PIN14 D5 PIN13 D6 Y PIN5 PIN12 D7 PIN11 A PIN10 B PIN8 GND PIN9 C PIN16 VCC...
  • Page 47 LC4966 SW D SW C CONT CONT COMPOSITE VIDEO: U4201 S-VIDEO BOARD: U4104 IN/OUT OUT/IN OUT/IN IN/OUT MULTI-CHANNEL: U6103 IN/OUT OUT/IN OUT/IN IN/OUT CONT CONT SW A SW B AT24C16 M24Cxx KEYBOARD: U210 16Kb /8Kb /4Kb /2Kb /1Kb / NC / NC / E0 V CC...
  • Page 48 HCF4094B KEYBOARD: U204~U207 & U211 SERIAL SERIAL CLOCK SERIAL STROBE LATCH LATCH STAGES 3 - 7 LATCH 1 OUTPUT ENABLE V DD 3-STATE STATE STATE V SS V DD V SS PT6306 KEYBOARD: U203 LATB HVO1 RDIO RDIO RDIN RDOUT LDIO LDIO DIRECTION...
  • Page 49 T89C51RD2 KEYBOARD: U201 & U202 74HC4051 74HC4051 KEYBOARD: U208 CHANNELS IN/OUT COM OUT/IN CHANNELS IN/OUT CHANNELS IN/OUT...
  • Page 50 BA7660FS COMPONENT VIDEO BOARD: U4301 MUTE OUTA1 OUTA2 OUTB1 OUTB2 N.C. N.C. OUTC1 OUTC2 74HC4052 74HC4052 COMPONENT VIDEO BOARD: U4302 & U4303 Y CHANNELS IN/OUT X CHANNELS IN/OUT COM "Y" OUT/IN COM "X" OUT/IN Y CHANNELS IN/OUT X CHANNELS IN/OUT DS232A RS232 BOARD: U901...
  • Page 51 LC74763 S-VIDEO BOARD: U4101 BA7625 COMPOSITE VIDEO BOARD: U4202 & U4203 S-VIDEO BOARD: U4102 & U4103...
  • Page 52 M61516FP MULTI-CHANNEL BOARD: U6101 & U6102...

  • Page 53: Exploded View

    EXPLODED VIEW...

  • Page 54: Exploded View

    EXPLODED VIEW...

  • Page 55: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Item Part No. Description Qty. 10-0163017-01-00 PLASTIC FOOT DOME SHAPE 10-0163045-72-00 LINKED GOGGLE BEZEL 10-0163055-72-01 DUO GOGGLE BEZEL 10-0752001-00-10 WINDOW LENS 10-0752005-72-00 VOLUME BEZEL 10-0752007-72-00 VIDEO COVER 10-0752022-02-00 POWER BUTTON BLACK 10-0752032-72-01 INPUT BUTTON 10-0752042-72-01 DUO BUTTON 10-0752045-01-00 POWER BUTTON BEZEL 10-0752065-01-00...
  • Page 56 Item Part No. Description Qty. 14-0300600-52-00 SELF TAPING SCREW 3 X 6 P/H TAPTITE NI-PLT TYPE-B 14-0300603-54-00 TAPTITE SCREW 3 X 6 B/H TYPE-B BLK 14-0300800-53-00 SELF TAPPING SCREW 3 X 8 B/B ZINC PLATED TAPTITE-TYPE 14-0300803-54-00 TAPTITE SCREW 3 X 8 B/H TYPE-B BLK PLT 14-0300804-54-00 TAPTITE SCREW 3 X 8 K/H TYPE-B BLK PLT 14-0301000-54-00...

  • Page 57: Electrical Parts List

    ELECTRICAL PARTS LIST (refer to schematic diagram for non critical component values) Reference No. Part No. Description POWER AMP MODULE 95-0907635-12-01 POWER AMPLIFIER MODULE FRONT & CENTER AMP BOARD PCB ASSEMBLY 80-0907630-40-00 FRONT AND CENTER AMP ASSEMBLY CAPACTIORS C501,C513,C525 22-3476052-00-43 CAP ELEC SS 4.7uF 50V 20% 85C C503,C515,C527 22-4110203-10-28 CAP MYLAR MCC-R 1000P 100V 10% C505,C517,C529...
  • Page 58 Reference No. Part No. Description R523,R547,R574 23-4228280-08-20 RES RN 0.22 OHM 5% 5W SIL 3 PIN R527,R528,R548,R556,R575,R576 23-2100230-00-00 RES MO 10 OHM 5% 1/2W R589,R590,R591 23-2100250-00-01 RES MO 10 OHM 5% 2W SURROUND LEFT/ RIGHT/ BACK AMP BOARD PCB ASSEMBLY 80-0907630-18-00 SURROUND LEFT/RIGHT/BACK AMP ASSEMBLY DIODES...
  • Page 59 Reference No. Part No. Description RESISTORS R8103,R843,R844 23-4228280-08-20 RES RN 0.22 OHM 5% 5W SIL 3 PIN R8110,R857,R858 23-2100250-00-01 RES MO 10 OHM 5% 2W AXIAL R829,R830,R837,R838,R894,R898 23-2100230-00-00 RES MO 10 OHM 5% 1/2W AXIAL R835,R836,R897 30-0102106-01-64 VR SEMI-FIX RES CF 1K OHM B 30% REGULATORS U871 27-3001201-17-14 I.C.
  • Page 60 Reference No. Part No. Description RESISTORS R1001,R1002,R1079,R1083,R1222 44-0470120-51-00 RES SMD 4.7K OHM 5% 1/16W 0603 R1003-R1006 44-0330120-51-00 RES SMD 3.3K OHM 5% 1/16W 0603 R1007,R1191-R1194 44-0330920-51-00 RES SMD 33 OHM 5% 1/16W 0603 R1008,R1020-R1022,R1026,R1036, 44-0100220-51-00 RES SMD 10K OHM 5% 1/16W 0603 R1040,R1050,R1054,R1064,R1068, R1114,R1131-R1138,R1230 R1009...
  • Page 61 Reference No. Part No. Description OSCILLATOR X1001 28-5122200-04-19 CRYSTAL CLOCK 12.288MHz 50ppm AUDIO BOARD PCB ASSEMBLY 80-0907630-11-00 AUDIO ASSEMBLY CAPACITORS C3101-C3116 22-3220022-00-43 CAP ELEC GS 22uF 16V 20% 85C RESISTORS J3101,J3102 44-0000027-11-00 RES SMD 0 OHM 5% 1/10W 0805 RCA JACKS M301-M303 34-4060420-00-60 RCA JACK 6 R-R-R/W-W-W RCA-653D-04...
  • Page 62 Reference No. Part No. Description J1008 26-6691386-00-16 FIBRE OPTIC TRANSMITTER GP1FA550TZ U1201,U1202 27-0804990-18-00 I.C. HEX INVERTER SMD SOP M74HCU04MIR U1203 27-0125190-18-00 I.C. 8-CH MULTIPLEXER-SSOP 74HC251M1R ISC BOARD PCB ASSEMBLY 80-0907630-74-00 ISC ASSEMBLY CAPACITORS C786-C789,C816-C820 22-4210402-00-31 CAP MpF 0.1uF 63V 5% DMF 5 SERIES C811-C813,C815,C829,C830,C832,C833 22-3100022-00-43 CAP ELEC SS 10uF 16V 20% 85C DIODES...
  • Page 63 Reference No. Part No. Description C208-C211 22-3470022-00-43 CAP ELEC SS 47uF 16V 20% 85C C212 22-3102012-00-28 CAP ELEC GR 1000uF 10V 20% 85C C214 22-3107052-00-43 CAP ELEC. SS 0.1uF 50V 20% 85C C224 22-3472032-00-28 CAP ELEC GR 4700uF 25V 20% 85C C241,C242 45-0102055-55-57 CAP CER SMD 1nF 50V 10% X7R 0603 C251-C254...
  • Page 64 Reference No. Part No. Description U210 27-2300225-00-25 I.C. EEPROM 2K BYTE 250nS PDIL AT24C16 U214 27-9810000-28-36 I.C. RESET MONITORS TCM810LENB713 CRYSTALS X201A,X202A 28-5200200-06-19 CRYSTAL 20.000MHz 30ppm HC-49S LED BOARD PCB ASSEMBLY 80-0907630-32-00 LED ASSEMBLY D211 26-0012587-01-10 LED RED-GREEN 5X807mm COMMON ANODE TACT SWITCHES S220 35-1001117-00-67 SW TACT NO 1P1T 50mA/12V...
  • Page 65 Reference No. Part No. Description TRANSISTORS Q6101 21-0000140-00-11 XTR SS NPN HFE 120 100MHz TO-92 SS8050C Q6102 21-0100131-00-11 XTR SS PNP HFE 170 1.5A TO-92 SS8550C Q6103 21-0100390-70-14 XTR SS PNP HFE 30 250MHz SPT DTA 114ESA Q6104 21-0000400-70-14 XTR SS NPN HFE30 250MHz SPT DTC114ESA Q6105,Q6106 21-0000360-00-00 XTR SS NPN HFE200-700 30MHz...
  • Page 66 Reference No. Part No. Description Q616,Q618,Q620,Q622,Q624,Q631 21-0100390-70-14 XTR SS PNP HFE 30 250MHz SPT DTA 114ESA CAPACITORS C637,C642,C647,C652,C657,C662, 22-3100022-00-43 CAP ELEC SS 10uF 16V 20% 85C C667,C672,C700,C705 C640,C645,C650,C655,C660,C665, 22-3220022-00-43 CAP ELEC GS 22uF 16V 20% 85C C670,C675,C703,C708 C679,C680,C691,C692 22-3470022-00-43 CAP ELEC SS 47uF 16V 20% 85C RESISTORS R635,R642,R647,R654,R659,R666, 23-1220102-00-00 RES MF 2.2K OHM 1% 1/6W...
  • Page 67 Reference No. Part No. Description FUSES F751*AH 33-0191001-00-88 FUSE 10A/250VAC TIME-LAG 5X20mm 5T UL/CSA F751*C 33-0181006-00-88 FUSE 6.3A/250VAC TIME-LAG 5X20mm 5T VDE/UL/CSA F752*AH 33-0111006-00-88 FUSE 1.6A 250V TIME LAG 5x20mm 5T UL/CSA/VDE/SEMKO F752*C 33-0151006-00-88 FUSE 800mA 250V TIME LAG 5x20mm 5T UL/CSA/VDE/SEMKO POWER SWITCH BOARD PCB ASSEMBLY...
  • Page 68 Reference No. Part No. Description S-VIDEO BOARD PCB ASSEMBLY 80-0907630-26-00 S-VIDEO ASSEMBLY CAPACITORS C4101-C4107,C4109-,C4111,C4113- 22-3226052-00-43 CAP ELEC SS 2.2uF 50V 20% 85C C4115,C4117-C4120,C4153,C4157 C4108,C4112,C4116,C4156 22-3471012-00-28 CAP ELEC GR 470uF 10V 20% 85C C4123,C4124 22-3221012-00-43 CAP ELEC SS 220uF 10V 20% 85C C4134,C4145,C4158,C4149 22-3101012-00-43 CAP ELEC SS 100uF 10V 20% 85C C4136,C4146...
  • Page 69 Reference No. Part No. Description DIODES D351-D353 20-3251902-00-01 DIODE ZENER BZX55 5.1V 1/2W 5% D354-D358,D3501-D3504 20-0000000-00-13 DIODE SW 4NS DO35 1N4148 PHONE JACKS M351-M357 34-4310300-00-60 PHONE JACK 1 BLACK PCB MOUNT 3.5mm TRANSISTORS Q351,Q352 21-0000380-70-14 XTR SS NPN HFE20 250MHz DTC-123ESA Q353,Q354 21-0000140-00-11 XTR SS NPN HFE 120 100MHz TO-92...
  • Page 70 Reference No. Part No. Description TRANSISTORS Q4201-Q4203,Q4207,Q4208 21-0100370-70-14 XTR SS PNP HFE 270-560 140MHz 2SA933AS Q4204,Q4206 21-0000120-70-14 XTR SS NPN HFE 68 30MHz SPT DTC144ES Q4205 21-0000450-70-14 XTR SS NPN 68 250MHz SPT DTA144ESA U4201 27-9496600-21-02 I.C. QUAD BILATERAL SWITCH LC4966 U4202,U4203 27-5076250-21-23 I.C.

  • Page 71: Packing Diagram

    300 TO 75 OHM ADAPTER 37-0240300-00-81 LITHIUM BUTTON CELL CR2025 61-0763004-40-99 OWNER MANUAL T763 GB/F/D/NL 61-0763004-41-99 OWNER MANUAL T763 E/I/P/S 83-0762000-00-04 REMOTE CONTROLLER NAD ZR-2 37-0020200-00-79 BATTERY AAA 1.5V ER03X 65-0752000-00-78 WARRANTY CARD 83-0752000-01-04 REMOTE CONTROLLER NAD HTR-2 63-0763001-00-01 POLYFOAM TOP / BOTTOM T763...

  • Page 72: Version History

    VERSION HISTORY SERIAL NUMBER SOFTWARE VER. PCB ASSEMBLY VERSION R38T76300001-R38T76300500 V1.24 ALL ARE ISSUE 3 R39T76300501-R39T76300900 V1.24 ALL ARE ISSUE 3 R3XT76300901-R3XT76301200 V1.24 ALL ARE ISSUE 4 R3XT76301201-R3XT76302200 V1.25 ALL ARE ISSUE 4 R3YT76302201-R3XT76302300 V1.26 ONLY MULTI/SECONDARY/ISC BOARDS ISSUE 4, ALL OTHER ISSUE 5. R3ZT76302301-R3XT76302800 V1.26 ONLY MULTI/SECONDARY/ISC BOARDS...
  • Page 73 NAD ELECTRONICS LTD LONDON...

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