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NAD T 763 Service Manual

Other manuals for T 763: Service Manual

Summary of T 763

  • Page 1

    Nad service manual t 763 t 763 phase ii & vc draft date: 17 mar 2006 new text.

  • 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 database part number description f751*ah,aht 370-019100-00(2) fuse time-lag 10a/250vac 5x20mm ul/csa 5t f751*c,ct 370-018100-05(2) ...

  • 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) 366 ±±±±± 20 mv s/n ratio (a-wtd, 1khz, 1 w, 8 ohm, sl/sr/bl) ≥≥≥≥≥ - ...

  • 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 subwoo...

  • Page 6

    6 1 2 3 4 5 6 7 8 9 21 10 20 11 19 12 13 14 15 16 17 18 t 763 (ah) north america t 763 (c) european version 2 5 1 17 15 16 13 10 11 12 19 3 9 6 7 8 4 18 14 front panel rear panel / front panel view rear panel 1. Fm & am antenna 2. Main in / audio pre-outs / subwoofer out 3. Soft clipping on/off 4. M...

  • Page 7: Disassembly Instructions

    7 disassembly instructions 1. 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. 2. Pull both sides of the top cover slightly outwards 11 and tilt approx. 35 ° and then remove in the direction as indica...

  • Page 8: Wiring Diagram

    8 keyboard main board trigger board power switch board j8101b j713a j714a j715a j719a j720a j717a j710a j711a j712a j707a j704a j502b j709a j713b j714b j203a j204b j901b j753b video 6 input board j758b j757b j709b dsp board j604b j715b j1009b j1010b led board psu board component video board digital ...

  • Page 9: Wiring Diagram Parts List

    9 wiring diagram parts list 1 276-022630-00 cable assy 2 ways awg26 2.5p l=480mm amp1 bd- j511a 2 276-041823-05 cable assy 4 ways awg=18 3.96p ul1007 amp1 bd- l=280mm j581a 3 276-062613-22 cable assy 6 ways awg=26 2.5p ul1007 amp1 bd- l=320mm (rohs) j503a 4 276-022613-05 cable assy 2 ways awg=26 2.5...

  • Page 10

    10 item database part number description remark 26 276-062613-10 cable assy 6 ways awg=26 2.5p ul1533 po bd-j611a l=700mm (rohs) 27 276-011643-29 cable assy 1 way awg=16 ul1672 ps bd-j756 brown l=100mm 28 276-011643-69 cable assy 1 way awg=16 ul1672 blue ps bd-j757 l=100mm 29 276-042613-07 cable ass...

  • Page 11: Block Diagram

    11 block diagram.

  • Page 12: Special Function

    12 special function feature a a 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...

  • Page 13: Amplifier Adjustment

    13 r522 r545 r571 p501 p502 p503 r881 r834 p803 p802 p801 r835 r836 r897 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 1mv reading on voltmeter. 5. Leave po...

  • Page 14: Pcb Layout

    14 pcb layout audio board composite video board.

  • Page 15

    15 a component video board - component side component video board - copper side.

  • Page 16

    15b component video board revision 3 - component side component video board revision 3 - copper side.

  • Page 17

    16 digital board - component side digital board - copper side.

  • Page 18

    17 dsp board - copper side dsp board - component side.

  • Page 19

    18 front/center amplifier board - component side.

  • Page 20

    19 front/center amplifier board - copper side.

  • Page 21

    20 surround amplifier board - component side.

  • Page 22

    21 surround amplifier board - copper side.

  • Page 23

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

  • Page 24

    23 main board.

  • Page 25

    24 multi-channel board - component side multi-channel board - copper side.

  • Page 26

    25 power supply (standby) isc board - component side isc board - copper side.

  • Page 27

    26 pre-out board - copper side pre-out board - component side rs-232 board - copper side - component side.

  • Page 28

    27 speaker terminal board power switch / trigger board video 6 board secondary board.

  • Page 29

    28 s-video board.

  • Page 30: Schematic Diagram

    29 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 acitors, unless other wise specified, are 50v , 10%..

  • Page 31

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

  • Page 32

    31 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 33

    32 isc e c b 2sa1015 2sc1815 e c b 2sa1016k 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. Components marke...

  • Page 34

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

  • Page 35

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

  • Page 36

    35 trigger dtc123esa e c b 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 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 38

    37 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 other wise specified, are 50v , 10%..

  • Page 39

    38 e c b 2sa1016 2sc2362 b c e 2sa1606 2sc4159 b c e 2sa2031 2sc5669 e c b 2sb772 e c b 2sd600k 2sd631k dtc123esa e c b front / center amplifier note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 10%. 3. Components marked are...

  • Page 40

    39 surround / back surround 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 resistors : rn-ceramic case, mo-metal oxide, unless otherwise specified are carbon film. Note...

  • Page 41

    40 speaker a & b rs-232 note: 1. Resistors, unless otherwise specified, are 1/6w, 5%..

  • Page 42

    41 digital in & out.

  • Page 43

    42 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

    43 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

    44 dsp note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 10%..

  • Page 46

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

  • Page 47

    46 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

    47 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

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

  • Page 50

    49 m0 m1 mclk filt+ vl ref_gnd sdout va gnd ainr vd vq sclk ainl lrck rst 1 2 3 4 5 6 7 8 5 1 2 6 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 5 1 2 6 16 15 14 13 12 11 10 9 voltage reference serial output interface digital filter high pass filter high pass filter decimation digital filter decimation dac ...

  • Page 51

    50 1 2 3 4 5 6 7 14 13 12 11 10 9 8 sig a in/out sig a out/in sig b out/in sig b in/out control b control c v ss v dd control a control d sig d in/out sig d out/in sig c out/in sig c in/out e, f, m, ns, or pw package (top view) tcm810 keyboard: u214 cd4066 composite video: u4201 s-video board: u4104...

  • Page 52

    51 hcf4094b keyboard: u204~u207 & u211 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 vdd q7 q8 q6 q5 q4 ...

  • Page 53: Com Out/in

    52 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

    53 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

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

  • Page 56

    55 m61516fp multi-channel board: u6101 & u6102.

  • Page 57

    56 1 2 28 20 5 6 7 8 10 12 14 15 16 17 9 11 18 19 4 21 21 21 22 21 23 22 23 24 25 26 26 26 26 22 27 27 27 30 31 32 33 33 23 45 38 39 40 41 42 43 46 13 67 47 48 49 51 53 50 55 56 57 58 59 50 62 63 64 66 83 70 72 41 61 92 91 73 74 75 76 80 77 78 79 81 82 69 84 85 86 87 88 89 71 90 68 41 37 36 35 29 34...

  • Page 58: Exploded View Parts List

    57 exploded view parts list 1 176-201123-04 fan dc 60 x 60 x 10mm 12v 0.09a 3000rpm 2 mga6012lr-a10(l) w/450mm connector (rohs) r.1 2 176-201123-05 fan dc 60 x 60 x 10mm 12v 0.09a 3000rpm 2 mga6012lr-a10(l) w/350mm connector (rohs) r.1 3 177-237636-00 transformer pw toroidal 120v/240v 1 t763 ti-0130...

  • Page 59

    58 item datebase part no. Description qty. 33 614-040080-03 machine screw m4 x 8 washer head 6 blk (rohs) [for ah & c ver.] 614-040080-02 machine screw m4 x 8 washer head 6 ni plt(rohs) [for aht & ct ver.] 34 614-040080-06 taptite screw dia4 x 8 b/h blk type-b 4 (rohs) 35 614-040080-08 taptite screw...

  • Page 60

    59 item datebase part no. Description qty. 70 666-076300-01 rear panel r.4 [for ah & aht ver.] 1 666-076301-01 rear panel r.4 [for c & ct ver.] 1 71 667-076202-01 side cap l [for ah & c ver.] 1 667-076202-00 side cap l [for aht & ct ver.] 1 72 667-076203-01 side cap r [for ah & c ver.] 1 667-076203-...

  • Page 61: Electrical Parts List

    60 electrical parts list reference no. Database part no. Description front & center amp board pcb assembly 800-a1bd63-20 t763ah (us) phase ii normal front and center amp board assembly capacitors c501,c513,c525 130-477052-04(8)/e cap elec ss 4.7uf 50v 20% 85c (rohs) c510,c511,c521,c522,c535,c534 130...

  • Page 62

    61 reference no. Database part no. Description q534,q521,q509 330-115231-01(8) xtr pw pnp 15a/230v to-3pb 2sa2031 q543-q545 339-000038-00(1) xtr ss npn hfe20 250mhz dtc123esatp q550,q551,q553,q554,q556,q557, 339-010041-00(1) xtr ss pnp hfe 280-560 110mhz q567,q564,q561 2sa1016kg-aa q566,q563,q569 33...

  • Page 63

    62 reference no. Database part no. Description relays m801,m802 182-312408-00(7) relay power dc24v 8a/250v 2p1t pcb mount me-11-024-2h4 thermistor m807 384-100057-00(5) thermistor ptc 100 ohm transistors q815,q816,q844,q850,q851,q852 330-101161-02(9) xtr pw pnp 1.5a/160v to-220ml 2sa1606e q818,q817,...

  • Page 64

    63 reference no. Database part no. Description connectors m901 274-500000-01(6) db9 female connector pcb mount right angle ic smds u901 500-072320-00(3) ic logic dual rs-232 transmit ter smd soic ds232ar audio board pcb assembly 800-aubd63-20 t763ah (us) phase ii audio board assembly capacitors c310...

  • Page 65

    64 reference no. Database part no. Description dsp board pcb assembly 800-dsbd63-20 t763ah (us) phase ii dsp board assembly capacitors c1004,c1014,c1062,c1155,c1100, 130-107052-03(6)/e cap elec ss 1uf 50v 20% 85c c1096,c1083,c1016 (rohs) c1005 130-227052-04(9)/e cap elec ss 2.2uf 50v 20% 85c (rohs) ...

  • Page 66

    65 reference no. Database part no. Description c1121,c1006 120-221527-50(5) cap cer smd 220pf 50v 10% x7r 0603 c1139,c1145,c1146,c1140 120-272527-51(4) cap cer smd 2.7nf 50v 10% x7r 0603 c1201-c1208 120-331527-50(3) cap cer smd 330pf 50v 10% x7r 0603 c1022,c1026,c1032,c1036,c1042, 120-332527-50(8) c...

  • Page 67

    66 reference no. Database part no. Description r1217,r1218 390-634024-10(9)/e res smd 634 ohm +/-1% 1/16w 0603 (rohs) r1213-r1214,r1216 390-750926-11(8) res smd 75 ohm 5% 1/16w 0603 r1177,r1178 390-910924-10(8) res smd 91 ohm 1% 1/16w 0603 smd ics u1004 500-011579-01(4) ic logic quad 2-input selecto...

  • Page 68

    67 reference no. Database part no. Description c763-c766 106-473676-00(3)/e cap mpf 0.047uf 100v +/-5% mem (rohs) c767,c768,c771,c772 106-332676-00(6)/e cap mpf 0.0033uf 100v +/-5% mem (rohs) c775,c776,c755,c756 130-227052-09(5) cap elec 2.2uf 50v 20% non- polar diodes d602,d604 303-327590-00(1) dio...

  • Page 69

    68 reference no. Database part no. Description speaker terminals m5101,m8101 262-300002-02(3) speaker terminal 6p binding r/b w/o plug speaker b board pcb assembly 800-pbbd63-20 t763ah (us) phase ii speaker b board assembly speaker terminals m5102 262-300002-04(5) speaker terminal 4p binding r/b w/o...

  • Page 70

    69 reference no. Database part no. Description q6101,q6102 339-000036-00(3) xtr ss npn hfe200-700 30mhz 2sc2878a q6104 339-000040-00(7) xtr ss npn hfe30 250mhz spt dtc114esatp q621-q626,q6103 339-010039-00(4) xtr ss pnp hfe 30 250mhz spt dta114esatp resistors r631,r632,r6110 381-100121-10(8) res mf ...

  • Page 71

    70 reference no. Database part no. Description f751*c,ct 370-018100-05(2) fuse time-lag 6.3a/250vac 5x20mm vde/ul/csa 5t f752*ah,aht 370-011100-06(4) fuse 1.6a 250v time lag lbc 5x20mm 5t ul/csa/vde/semko f752*c,ct 370-015100-03(3) fuse 800ma 250v time lag lbc 5x20mm 5t ul/csa/vde/semko fuse holders...

  • Page 72

    71 reference no. Database part no. Description bridge rectifiers d801,d802 305-512540-04(5)/e bridge rectifier 25a 400v br254w br-25w (rohs) jumper bars jmp1,jmp2 670-075200-01(7)/e jumper bar dia1.5 x 25 r.1 (rohs) trigger board pcb assembly 800-trbd63-20 t763ah (us) phase ii trigger board slide sw...

  • Page 73

    72 reference no. Database part no. Description c715 106-105076-01(4)/e cap mpf 1uf 63v +/-5% mem (rohs) c719,c702 130-101022-10(6)/e cap elec km 100uf 16v 20% 105c (rohs) c724 130-473032-06(3) cap elec egh 4700uf 25v 20% 105c diodes d701-d704,d709-d710 301-010071-00(3)/e diode rect 1a/1000v do41 win...

  • Page 74

    73 u4203,u4202 505-507625-00(2) ic av switch dip ba7625 smd resistors j4201,j4202 398-000036-20(7)/e res smd 0 ohm +/-5% 1/10w 0805 (gp) keyboard pcb assembly 810-376300-22 t763ah (us) phase ii v3.0 keyboard board assembly capacitors c212 130-103012-04(4)/e cap elec gr 1000uf 10v 20% 85c (rohs) c255...

  • Page 75

    74 reference no. Database part no. Description ic u210 502-230022-08(2)/e ic eeprom 2k byte 250ns pdil endurance : 1 million cycles at 24c16 (rohs) smd capacitors c241,c242 120-102527-51(9) cap cer smd 1nf 50v 10% x7r 0603 c201-c202,c213,c215-c222,c229, 120-104528-71(9) cap cer smd 0.1uf 50v 20% y5v...

  • Page 76

    75 reference no. Database part no. Description capacitors c4401,c4402,c4403 130-227052-04(9)/e cap elec ss 2.2uf 50v 20% 85c rad ess-r-225m1h-01 (rohs) jacks m4401 265-401000-01(9) rca jack 1 yellow pcb mount gold (w/o cover) m4404 265-401010-01(7) rca jack 1 red pcb mount gold (w/o cover) m4403 265...

  • Page 77

    76 reference no. Database part no. Description transistors q4102 339-000045-00(2) xtr ss npn 68 250mhz spt dta144esatp q4103,q4122,q4101,q4131 339-000012-00(2) xtr ss npn hfe 68 30mhz spt dtc144esatp q4109-q4112,q4116-q4119 339-010037-00(6) xtr ss pnp hfe 270-560 140mhz 2sa933astps q4123,q4120 339-0...

  • Page 78

    77 reference no. Database part no. Description q813,q782,q781,q811 339-010041-00(1) xtr ss pnp hfe 280-560 110mhz 2sa1016kg-aa q832,q830,q814,q816 339-010010-01(9)/e xtr ss pnp hfe 100 200mhz to-92 a1015y (rohs) resistors r791,r814 380-220023-12(2) res cf 220 ohm 5% 1/6w r793,r813,r790,r817 386-0228...

  • Page 79

    78 reference no. Database part no. Description rca jacks m4501-m4504 265-403202-00(1) rca 3 g-bl-r pcb mount gold (w/cover) transistors q4501-q4503 339-000001-01(6)/e xtr ss npn hef 100 200mhz to-92 c1815y (rohs) q4505,q4506 339-000040-00(7) xtr ss npn hfe30 250mhz spt dtc114esatp q4507 339-010037-0...

  • Page 80

    79 reference no. Database part no. Description r4564 398-100126-10(9)/e res. Smd 1k ohm +/-5% 1/16w 0603 (gp) r4536-r4540 398-100226-10(6)/e res. Smd 10k ohm +/-5% 1/16w 0603 (gp) r4624 398-120026-10(2)/e res. Smd 120 ohm +/-5% 1/16w 0603 (gp) r4509-r4510 398-120926-10(2)/e res. Smd 12 ohm +/-5% 1/1...

  • Page 81: Packing Diagram & Parts List

    80 packing diagram & parts list 9 8 7 6 1 2 3 4 5 item database part no. Description qty. 1 906-909000-00(3) polybag manual 1 2 173-640752-00(6)/e fm wire antenna l=2700mm 1 w/y-terminals (rohs) 2 210-002020-02(2) battery aaa 1.5v er03x 4 2 212-024030-00(2)/e battery gp lithium button cell 1 cr2025 ...

  • Page 82: Version History

    81 version history serial number software ver. Pcb assembly version r5yt763vc57611-r5yt763vc58085 v2.11 only 555-2763 05 -22 & 555-3773 01 -29, other are 555-3763 01 -## r5yt763vc58086-r5yt763vc58110 v2.11 only 555-2763 05 -22 & 555-3773 02 -29, other are 555-3763 01 -## r61t763vc58111-r61t763vc5851...

  • Page 83: Ser

    82 ser vice manual t 763 (phase ii - v3) surround sound receiver nad electronics ltd london.