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NAD T 773 Service Manual

Other manuals for T 773: Owner's Manual Addendum

Summary of T 773

  • Page 1

    Nad service manual t 773 t 773 a/v receiver a/v receiver draft date: 1 mar 2004.

  • Page 2: Safety Information

    2 safety information ah version c version.

  • Page 3: Service Safety Precautions

    3 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...

  • Page 4: Specifications

    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/bs) ≤ 0.1 % input sensitivity (ref. 8 ohms, 1 khz) 166 ± 20 mv s/n ratio (a-wtd, 1khz, 1 w, 8 ohm, sl/sr/bl) ≥≥≥≥≥ - 72 d...

  • Page 5

    5 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 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 o...

  • Page 6

    6 front panel rear panel / front panel view rear panel 1. Fm & am antenna 2. Ir input & output 3. +12v trigger input & output 4. Soft clipping on/off 5. Ms out (multisource out) 6. Monitor out 7. Cd input 8. Component video in & component video out 9. Digital audio input & digital audio output 10. R...

  • Page 7: Disassembly Instructions

    7 disassembly instructions 1. 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. 1 2 3 4 8 9 10 11 12 5 6 7 2. Pull both sides of the top cover slightly outwards 13 and tilt approx. 35 ° and then remove...

  • Page 8: Wiring Diagram

    8 a wiring diagram.

  • Page 9: Wiring Diagram

    8 b therm sensnor ul version : use j758, j759 ce version : use j760 3 pcs 2 pcs 36-2828201-71-xx ffc cable 28 pins p1.25 l=200mm 82-0226135-04-xx cable assy 2 ways 2.5p ul1533 l=540mm 82-0426135-03-xx cable assy 4 ways 2.5p ul2468 l=540mm 36-1728201-71-xx ffc cable 17 pins p1.25 l=200mm 36-2028201-7...

  • Page 10: Block Diagram

    9 block diagram.

  • Page 11: Special Function

    10 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 & waveforms on system test & debugging t89c51rd2 (u2...

  • Page 12: Amplifier Adjustment

    11 r522 r545 r571 r835 p501 p502 p503 r835 r836 r897 p802 p801 p803 j511b j811b amplifier adjustment idle current 1. Rotate r522 fully clockwise. 2. Connect dc millivoltmeter to p501 (i.E. Across half of r523, 0.22 ohm resistor). 3. Turn on the unit. 4. Adjust r522 for 2mv reading on voltmeter. 5. L...

  • Page 13: Pcb Layout

    12 pcb layout audio board - component side audio board - copper side.

  • Page 14

    13 component video board - component side component video board - copper side digital board - component side digital board - copper side.

  • Page 15

    14 dsp board - copper side dsp board - component side.

  • Page 16

    15 front/center amplifier board - component side.

  • Page 17

    16 front/center amplifier board - copper side.

  • Page 18

    17 surround amplifier board - component side.

  • Page 19

    18 surround amplifier board - copper side.

  • Page 20

    19 key board / led board - component side key board / led board - copper side.

  • Page 21

    20 main board.

  • Page 22

    21 multi-channel board - component side - copper side trigger board.

  • Page 23

    22 power supply (standby) isc for front amp board - component side - copper side.

  • Page 24

    23 isc for surround amp board - component side - copper side composite video board.

  • Page 25

    24 pre-out board - component side.

  • Page 26

    25 pre-out board - copper side.

  • Page 27

    26 speaker terminal board power switch / video 6 board secondary board.

  • Page 28

    27 s-video board.

  • Page 29: Schematic Diagram

    28 schematic diagram audio switch resistors : unless otherwise specified are carbon film. Note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic cap acit ors, unless other wise specified, are 50v , 10%..

  • Page 30

    29 component video resistors : unless otherwise specified are carbon film. Note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic cap acit ors, unless other wise specified, are 50v , 10%..

  • Page 31

    30 e c b 2sa933 dtc144esa e c b dt a144esa e c b composite video resistors : unless otherwise specified are carbon film. Note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic cap acit ors, unless other wise specified, are 50v , 10%..

  • Page 32

    31 isc e c b 2sa1015 2sc1815 e c b 2sa1016k rn rn rn rn resist ors : rn-cermic case, mo-met a l oxide, f-fusible unless other wise specified are carbon film. Note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic cap acit ors, unless other wise specified, are 50v , 10%. 3. Comp...

  • Page 33

    32 power supply (secondary) note: 1 . Resistors, unless otherwise specified, are 1/6w, 5%. 2. Components marked “ ” are safety critial p arts..

  • Page 34

    33 power supply (stand by) e c b 2sc1815 resistors : f-fusible, unless otherwise specified are carbon film. N o t e : 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. Components marked “ ” are safety critial p arts..

  • Page 35

    34 trigger resistors : unless otherwise specified are carbon film. Note: 1 . Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic cap acit ors, unless other wise specified, are 50v , 10%..

  • Page 36

    35 video 6 resistors : unless otherwise specified are carbon film. Note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic cap acit ors, unless other wise specified, are 50v , 10%..

  • Page 37

    36 e c b 2sa933 e c b 2sc1740 e c b 2sc1815 2sc2878 dtc144esa dtc123esa dt a144esa e c b s-video resistors : unless otherwise specified are carbon film. Note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2 . All ceramic cap acit ors, unless otherwise specified, are 50v , 10%..

  • Page 38

    37 e c b 2sa1016 2sc2362 b c e 2sa1606 2sc4159 b c e 2sa2031 2sc5669 e c b 2sd600k 2sd631k dtc123esa e c b rn rn rn rn front / center / back surround right amplifier note: 1. Resistors, unless other wise specified, are 1/6w , 5%. 2. All ceramic cap acit ors, unless other wise specified, are 50v , 10...

  • Page 39

    38 surround / back surround left amplifier e c b 2sc2362 e c b 2sa1015 2sa1815 b c e 2sa1606 2sc4159 b c e 2sa2031 2sc5669 e c b 2sd600k 2sd631k dtc123esa e c b e c b 2sa1016k 2sc2362 e c b 2sc1740s e c b 2sb772 rn rn rn resist ors : rn-ceramic case, mo-met a l oxide, unless other wise specified are...

  • Page 40

    39 speaker a & b.

  • Page 41

    40 digital in & out.

  • Page 42

    41 a e b c 2sd600k main board note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 10%..

  • Page 43

    41 b e b c 2sd600k main board note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 10%..

  • Page 44

    42 e c b rn1241 dta114esa e c b pre-out note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 10%..

  • Page 45

    43 e c b 2sc1815 dsp note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 10%..

  • Page 46

    44 e c b 2sc1815 e c b 2sc1015 keyboard note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 5%..

  • Page 47

    45 e c b 2sc2878 e b c ss8050 ss8550 dtc144esa dta144esa e c b multi-ch 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

    46 1 2 3 4 5 6 7 8 9 10 dir a1 a2 a3 a4 a5 a6 a7 a8 gnd 20 19 18 17 16 15 14 13 12 11 vcc g b1 b2 b3 b4 b5 b6 b7 b8 (1) (2) (3) (4) (5) (6) (7) (8) (9) (11) (19) (18) (17) (16) (15) (14) (13) (12) oe ck d0 1d c1 en d1 d2 d3 d4 d5 d6 d7 q0 q1 q2 q3 q4 q5 q6 q7 74lvq574 dsp board: u1008, u1009 w27c020...

  • Page 49

    47 cs49326 dsp board: u1001 cs8415a dsp board: u1005 cs4392 dsp board: u1025.

  • Page 50

    48 74hcu04 digital board: u1201 & u1202 1a 1y 2a 2y 3a 3y gnd 1 2 3 4 5 6 7 14 13 12 11 10 9 8 6a v cc 6y 5a 5y 4a 4y cs5333kz dsp board: u1027 74hc251 digital board: u1203 pin4 d0 w pin6 y pin5 pin8 gnd pin16 vcc pin7 strobe s0 pin3 d1 s1 pin2 d2 s2 pin1 d3 s3 pin15 d4 s4 pin14 d5 s5 pin13 d6 s6 pi...

  • Page 51

    49 vdd cont a cont d in/out in/out out/in sw d sw c out/in in/out out/in out/in in/out vss cont b cont c 14 8 9 10 11 12 13 1 7 6 5 4 3 2 sw a sw b sw a sw d sw b sw c tcm810 keyboard: u214 lc4966 composite video: u4201 s-video board: u4104 multi-channel: u6103 at24c16 keyboard: u210 sda vss scl wc ...

  • Page 52

    50 hcf4094b keyboard: u204~u207 & u211 dsp board: u1029 serial in clock strobe latch 1 3-state 1 output enable 2 serial out q' s 10 serial out q s 9 15 1 d q cl cl 3 cl cl 1 cl cl 2 d q cl cl latch 2 tr tr latch 3 tr tr 3- state 2 3- state 3 3 d q cl cl q stages 3 - 7 2 2 2 2 2 2 2 2 q3 q2 q1 vss vd...

  • Page 53: Com Out/in

    51 t89c51rd2 keyboard: u201 & u202 74hc4051 keyboard: u208 4 6 com out/in 7 5 inh v ee gnd 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 v cc 2 1 0 3 a b c channels in/out channels in/out channels in/out 74hc4051.

  • Page 54

    52 0 2 com "y" out/in 3 1 inh v ee gnd 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 v cc 2 1 com "x" out/in 0 3 a b y channels in/out x channels in/out x channels in/out y channels in/out 74hc4052 ba7660fs component video board: u4301 mute ina gnd inb gnd n.C. Inc gnd 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 ...

  • Page 55

    53 lc74763 s-video board: u4101 ba7625 composite video board: u4202 & u4203 s-video board: u4102 & u4103.

  • Page 56

    54 m61516fp multi-channel board: u6101 & u6102.

  • Page 57

    55 74 50 46 25 57 73 49 45 47 41 42 18 54 51 10 43 9 49 27 44 13 49 6 64 47 30 20 36 5 14 22 43 7 3 4 28 16 15 12 49 49 21 56 49 66 70 2 69 35 49 49 48 49 47 45 33 11 8 17 19 52 37 60 53 79 75 exploded view.

  • Page 58

    56 58 47 24 32 34 45 77 47 55 65 66 78 26 62 59 29 76 39 40 38 23 exploded view.

  • Page 59

    57 ,168/$725 &20(:,7+ 75$16)250(5 1 61 80 63 72 31 71 68 67 exploded view.

  • Page 60: Exploded View Parts List

    58 exploded view parts list item part number description qty 1 02-0000020-00-00 nylon od18 x 9.3 x 3.5mm wr-1809 2 2 10-0163017-01-00 plastic foot dome shape 4 3 10-0163045-72-00 linked goggle bezel 2 4 10-0163055-72-01 duo goggle bezel 2 5 10-0752001-00-10 window lens 1 6 10-0752005-72-00 volume be...

  • Page 61

    59 51 14-0300803-44-00 taptite screw 3 x 8 b/h type ìsî blk plt 4 52 14-0300803-54-00 taptite screw 3 x 8 b/h type ìbî blk plt 52 53 14-0300804-54-00 taptite screw m3 x 8 k/h type ìbî blk plt 10 54 14-0301000-54-00 taptite screw 3 x 10 p/h type ìbî blk 8 55 14-0301400-02-00 machine screw m3 x 14 b/h...

  • Page 62: Electrical  Parts List

    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 myla...

  • Page 63

    61 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 re...

  • Page 64

    62 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,r85...

  • Page 65

    63 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 s...

  • Page 66

    64 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 assem...

  • Page 67

    65 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 optic...

  • Page 68

    66 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 diod...

  • Page 69

    67 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,...

  • Page 70

    68 reference no. Part no. Description led 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 ...

  • Page 71

    69 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,...

  • Page 72

    70 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 21-0...

  • Page 73

    71 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 swi...

  • Page 74

    72 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-...

  • Page 75

    73 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...

  • Page 76: Packing Diagram & Parts List

    74 packing diagram & parts list 9 8 7 6 1 2 3 4 5 item part no. Description qty. 1 64-0200001-01-00 polybag manual 1 2 31-6407520-00-98 fm wire antenna 1 31-6472801-00-28 am loop antenna w/stand 1 34-0081004-00-67 300 to 75 ohm adapter 1 37-0240300-00-81 lithium button cell cr2025 1 61-0773004-40-99...

  • Page 77: Version History

    75 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 issu...

  • Page 78: Ser

    76 ser vice manual t 773 a/v receiver nad electronics ltd london.