NAD T 773 Service Manual
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NAD T 773 Service Manual

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DRAFT DATE: 1 MAR 2004
NAD
T 773
A/V Receiver

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Summary of Contents for NAD T 773

  • Page 1 DRAFT DATE: 1 MAR 2004 T 773 A/V 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 33-0321111-00-88 FUSE 20A/250VAC SLOW BLOW 6X32mm 6S UL/CSA F751*C 33-0161006-00-88 FUSE 10A/250VAC TIME-LAG 5X20mm 5D 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) 166 ±...

  • 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 FM & AM ANTENNA 10. RS-232 IR INPUT & OUTPUT POWER SWITCH +12V TRIGGER INPUT & OUTPUT 12. SWITCHED AC OUTLETS SOFT CLIPPING ON/OFF 13. AC POWER INLET MS OUT (MULTISOURCE OUT) 14.

  • Page 7: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS Remove machine screws M4.0 x 8.0 (1 to 8) from the side panels. Remove tapping screw 3.0 x 8.0 (9 to 12) from the back panel. Refer to Figure No. 1. Figure No. 1 Pull both sides of the TOP COVER slightly outwards 13 and tilt approx. 35 ° and then remove in the direction as indicated by the arrow 14.

  • Page 8: Wiring Diagram

    WIRING DIAGRAM...
  • Page 9 WIRING DIAGRAM J757B J756B...

  • Page 10: Block Diagram

    BLOCK DIAGRAM...

  • Page 11: 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 12: Adjustment Points Diagram / Amplifier Adjustment

    ADJUSTMENT POINT DIAGRAM FRONT/CENTER AMPLIFIER BOARD R522 R545 R571 R835 P501 P502 P503 SURROUND AMPLIFIER BOARD R835 R836 R897 P801 P802 P803 ISC FRONT AMP BOARD ISC SURROUND AMP BOARD J811B J511B AMPLIFIER ADJUSTMENT Idle Current Rotate R522 fully clockwise. Connect DC millivoltmeter to P501 (i.e.

  • Page 13: Pcb Layout

    PCB LAYOUT AUDIO BOARD - COMPONENT SIDE AUDIO BOARD - COPPER SIDE...
  • Page 14 COMPONENT VIDEO BOARD - COMPONENT SIDE COMPONENT VIDEO BOARD - COPPER SIDE DIGITAL BOARD - COMPONENT SIDE DIGITAL BOARD - COPPER SIDE...
  • Page 15 DSP BOARD - COMPONENT SIDE DSP BOARD - COPPER SIDE...
  • Page 16 FRONT/CENTER AMPLIFIER BOARD - COMPONENT SIDE...
  • Page 17 FRONT/CENTER AMPLIFIER BOARD - COPPER SIDE...
  • Page 18 SURROUND AMPLIFIER BOARD - COMPONENT SIDE...
  • Page 19 SURROUND AMPLIFIER BOARD - COPPER SIDE...
  • Page 20 KEY BOARD / LED BOARD KEY BOARD / LED BOARD - COMPONENT SIDE - COPPER SIDE...
  • Page 21 MAIN BOARD...
  • Page 22 MULTI-CHANNEL BOARD - COMPONENT SIDE - COPPER SIDE TRIGGER BOARD...
  • Page 23 POWER SUPPLY (STANDBY) ISC FOR FRONT AMP BOARD - COPPER SIDE - COMPONENT SIDE...
  • Page 24 ISC FOR SURROUND AMP BOARD - COPPER SIDE - COMPONENT SIDE COMPOSITE VIDEO BOARD...
  • Page 25 PRE-OUT BOARD - COMPONENT SIDE...
  • Page 26 PRE-OUT BOARD - COPPER SIDE...
  • Page 27 POWER SWITCH / VIDEO 6 BOARD SPEAKER TERMINAL BOARD SECONDARY BOARD...
  • Page 28 S-VIDEO BOARD...

  • Page 29: Schematic Diagram

    SCHEMATIC DIAGRAM AUDIO SWITCH...
  • Page 30 COMPONENT VIDEO...
  • Page 31 COMPOSITE VIDEO...
  • Page 33 POWER SUPPLY (SECONDARY)
  • Page 34 POWER SUPPLY (STAND BY)
  • Page 35 TRIGGER...
  • Page 36 VIDEO 6...
  • Page 37 S-VIDEO...
  • Page 38 FRONT / CENTER / BACK SURROUND RIGHT AMPLIFIER...
  • Page 39 SURROUND / BACK SURROUND LEFT AMPLIFIER...
  • Page 40 SPEAKER A & B...
  • Page 41 DIGITAL IN & OUT...
  • Page 42 MAIN BOARD 2SD600K E B C NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%.
  • Page 43 MAIN BOARD 2SD600K E B C NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/6W, 5%. 2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V, 10%.
  • Page 44 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 45 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 46 KEYBOARD 2SC1815 2SC1015 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, 5%.
  • Page 47 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 48: 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 FRONT BOARD: U8101...
  • Page 49 CS4392 DSP BOARD: U1025 CS49326 DSP BOARD: U1001 CS8415A DSP BOARD: U1005...
  • Page 50 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 51 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 52 HCF4094B KEYBOARD: U204~U207 & U211 DSP BOARD: U1029 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...
  • Page 53 T89C51RD2 KEYBOARD: U201 & U202 74HC4051 74HC4051 KEYBOARD: U208 CHANNELS IN/OUT COM OUT/IN CHANNELS IN/OUT CHANNELS IN/OUT...
  • Page 54 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 DIGITAL BOARD: U901...
  • Page 55 LC74763 S-VIDEO BOARD: U4101 BA7625 COMPOSITE VIDEO BOARD: U4202 & U4203 S-VIDEO BOARD: U4102 & U4103...
  • Page 56 M61516FP MULTI-CHANNEL BOARD: U6101 & U6102...

  • Page 57: Exploded View

    EXPLODED VIEW...

  • Page 58: Exploded View

    EXPLODED VIEW...
  • Page 59 EXPLODED VIEW...

  • Page 60: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Item Part Number Description 02-0000020-00-00 NYLON OD18 X 9.3 X 3.5mm WR-1809 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...
  • Page 61 Item Part Number Description 14-0300803-44-00 TAPTITE SCREW 3 X 8 B/H TYPE ìSî BLK PLT 14-0300803-54-00 TAPTITE SCREW 3 X 8 B/H TYPE ìBî BLK PLT 14-0300804-54-00 TAPTITE SCREW M3 X 8 K/H TYPE ìBî BLK PLT 14-0301000-54-00 TAPTITE SCREW 3 X 10 P/H TYPE ìBî BLK 14-0301400-02-00 MACHINE SCREW M3 X 14 B/H NI-PLT 14-0350803-52-00...

  • Page 62: Electrical Parts List

    ELECTRICAL PARTS LIST (refer to schematic diagram for non critical component values) Reference No. Part No. Description POWER AMP MODULE 95-0907735-12-01 POWER AMPLIFIER MODULE FRONT & CENTER AMP BOARD PCB ASSEMBLY 80-0907730-40-00 FRONT AND CENTER AMP ASSEMBLY CAPACTIORS C501,C513,C525,C801 22-3476052-00-43 CAP ELEC SS 4.7uF 50V 20% 85C C503,C515,C527,C805 22-4110203-10-28 CAP MYLAR MCC-R 1000P 100V 10% C505,C517,C529,C809...
  • Page 63 Reference No. Part No. Description RESISTORS R522,R545,R571,R835 30-0102106-01-64 VR SEMI-FIX RES CF 1K OHM B 30% R523,R547,R574,R843 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 R829,R837 R589-R591,R857 23-2100250-00-01 RES MO 10 OHM 5% 2W SURR.
  • Page 64 Reference No. Part No. Description Q855,Q857,Q859 21-1011211-50-12 XTR PW PNP 1A/100V TO-126 2SB631KE Q871 21-1036003-50-06 XTR PW 3A/60V TO-126 2SB772Q Q872 21-0000390-70-14 XTR SS NPN HFE270-560 180MHz 2SC1740S 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 R829,R830,R837,R838,R894,R898...
  • Page 65 Reference No. Part No. Description TRANSISTORS Q1001,Q1003 21-0000010-00-46 XTR SS NPN HEF 100 200MHz TO-92 C1815Y RESISTORS R1001,R1002,R1079,R1083 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,...
  • Page 66 Reference No. Part No. Description U1027 27-9533300-24-53 I.C. 24BIT 96KHz STEREO A/D CS5333KZ U1029 27-0540940-18-00 I.C. 8-STAGE SHIFT & STORE BUS REGISTER HCF4094BM1 OSCILLATOR X1001 28-5122200-04-19 CRYSTAL CLOCK OSCILLATOR 12.288MHz 50ppm AUDIO BOARD PCB ASSEMBLY 80-0907730-11-00 AUDIO ASSEMBLY CAPACITORS C3101-C3116 22-3220022-00-43 CAP ELEC GS 22uF 16V 20% 85C RCA JACKS M301-M303...
  • Page 67 Reference No. Part No. Description C1222,C1223 22-3101022-00-43 CAP ELEC SS 100uF 16V 20% 85C C901,C902,C903,C904 22-3106052-00-43 CAP ELEC SS 1uF 50V 20% 85C C905 22-3100022-00-43 CAP ELEC SS 10uF 16V 20% 85C RCA JACK J1001-J1004,J1007 34-4010320-00-60 RCA JACK 1 BLACK PCB MOUNT GOLD FIBRE OPTICAL J1005,J1006 26-6701380-01-16 FIBRE OPTIC RECEIVING UNIT...
  • Page 68 Reference No. Part No. Description ISC FRONT BOARD PCB ASSEMBLY 80-0907730-74-00 ISC SURROUND ASSEMBLY CAPACITORS C8101-C8104,C816-C820 22-4210402-00-31 CAP MPF 0.1uF 63V 5% DMF 5 SERIES C8106,C8107,C8108,C8109,C9110 22-3100022-00-43 CAP ELEC SS 10uF 16V 20% 85C DIDOES D8101 20-5010401-50-47 DIODE BRI 10A/400V KBK10G D8102,D8103 20-1912601-90-45 DIODE RECT 12A/600V TO-220 TYN612 D8104,D8105...
  • Page 69 Reference No. Part No. Description DIODES D212,D214-D218 20-0000000-00-13 DIODE SW 4NS DO35 1N4148 D220 20-3251902-00-01 DIODE ZENER BZX55 5.1V 1/2W 5% ENCODER M201 35-6001219-00-08 ENCODER ROTATRY L=20mm VER W/O CLICK TRANSISTORS Q201 21-0100100-00-46 XTR SS PNP HFE 100 200MHz TO-92 A1015Y Q203,Q204,Q205,Q206 21-0000010-00-46 XTR SS NPN HEF 100 200MHz TO-92 C1815Y...
  • Page 70 Reference No. Part No. Description D211 26-0012587-01-10 LED RED-GREEN 5X807mm COMMON ANODE TACT SWITCHES S220 35-1001117-00-67 SW TACT NO 1P1T 50mA/12V MAIN BOARD PCB ASSEMBLY 80-0907730-00-00 MAIN ASSEMBLY CAPACITORS C701,C705,C706,C716,C725 22-3102032-30-28 CAP ELEC KM 1000uF 25V 20% 105C C702,C719,C723 22-3101022-30-13 CAP ELEC KM 100uF 16V 20% 105C C704 22-3332042-30-35 CAP ELEC KM 3300uF 35V 20% 105C C707...
  • Page 71 Reference No. Part No. Description C775,C776,C755,C756 22-8226052-00-28 CAP ELEC 2.2uF 50V 20% NON-POLAR C6301-C6304 45-0104056-57-57 CAP CER SMD 0.1uF 50V 20% Y5V 0603 DIODES D601 20-0000000-00-13 DIODE SW 4NS DO35 1N4148 D602,D604 20-3275902-00-01 DIODE ZENER BZX55 7.5V 1/2W 5% INDUCTORS L6101,L6102 24-0101108-00-28 IND CHOKE 100uH 10% RCA JACKS...
  • Page 72 Reference No. Part No. Description RCA JACKS M607,M609,M610 34-4040500-00-60 RCA JACK 4 R-W/R-WRS-413G-08 M608,M612 34-4020300-00-60 RCA JACK 2 B/B RS-213G-02 TRANSISTORS Q608-Q615,Q617,Q629,Q630,Q632,Q633 21-0000350-70-00 XTR SS NPN HFE200-700 30MHz SPT RN1241A Q616,Q618,Q620,Q622,Q624,Q631 21-0100390-70-14 XTR SS PNP HFE 30 250MHz SPT DTA 114ESA RESISTORS R635,R642,R647,R654,R659,R666,...
  • Page 73 Reference No. Part No. Description R754 23-8395232-00-06 COND PATH RESISTOR 3.9M OHM 1/2W 5% RNV1/2 STANDBY TRANSFORMER T751 25-0040021-31-18 XFOFMER PW EI-35 100V/220V T05382B RELAY T751 32-3112210-00-40 RELAY POWER DC12V 20A 220VAC 1P1T POWER SWITCH BOARD PCB ASSEMBLY 80-0907730-48-00 POWER SWITCH ASSEMBLY CAPACITOR C764 22-1103960-37-71 CAP CER 0.01uF 250VAC 20%...
  • Page 74 Reference No. Part No. Description DIODES D4101-D4107 20-0000000-00-13 DIODE SW 4NS DO35 1N4148 INDUCTORS L4101 24-0569107-00-28 IND CHOKE 5.6uH 10% L4102 24-0220107-00-28 IND CHOKE 22uH 10% DIN JACKS M411-M418 34-4110300-00-60 DIN JACK 1 BLACK PCB MOUNT MD-113 Q4101,Q4103,Q4122,Q4131 21-0000120-70-14 XTR SS NPN HFE 68 30MHz SPT DTC144ES Q4102 21-0000450-70-14 XTR SS NPN 68 250MHz SPT...
  • Page 75 Reference No. Part No. Description SLIDE SWITCH S351 35-4102209-00-67 SW SLIDE 2P2T RIGHT L=9 REGULATORS U3501,U3502 27-3001201-17-14 I.C. VOLT REG 12V 1A TO-220 NJM7812 U352 27-3001201-07-85 I.C. VOLT REG 12V 0.1A TO-92 LM78L12 VIDEO-6 BOARD PCB ASSEMBLY 80-0907730-45-00 VIDEO-6 BOARD CAPACITORS C4401,C4402,C4403 22-3226052-00-43 CAP ELEC SS 2.2uF 50V 20% 85C...

  • Page 76: Packing Diagram

    300 TO 75 OHM ADAPTER 37-0240300-00-81 LITHIUM BUTTON CELL CR2025 61-0773004-40-99 OWNER'S MANUAL T773 GB/F/D/NL 61-0773004-41-99 OWNER'S MANUAL T773 E/I/P/S 83-0762000-00-04 REMOTE CONTROLLER NAD ZR-2 37-0020200-00-79 BATTERY AAA 1.5V ER03X 65-0752000-00-98 WARRANTY CARD 83-0752000-01-04 REMOTE CONTROLLER NAD HTR-2 63-0773001-00-01 POLYFOAM TOP / BOTTOM T773...

  • Page 77: Version History

    VERSION HISTORY SERIAL NUMBER SOFTWARE VER. PCB ASSEMBLY VERSION R38T77300001-R38T77300002 V.123 ALL ARE ISSUE 3 R38T77300003-R38T77300017 V1.24 ALL ARE ISSUE 3 R38T77300018-R38T77300500 V1.26 DSP BOARD ISSUE 5, ALL OTHERS ISSUE 4 R3XT77300501-R3XT77301100 V1.26 DSP BOARD ISSUE 5, ALL OTHERS ISSUE 4 R3YT77301101-R3YT77301600 V1.26 ONLY AUDIO/S-VIDEO/MULTI-CH BOARDS...
  • Page 78 NAD ELECTRONICS LTD LONDON...

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