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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 surround sound receiver surround sound receiver draft date: 06 feb 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 33-0191001-00-88 fuse 10a/250vac time-lag 5x20mm 5t ul/csa f751*c 33-0181006-00-88 fuse 6.3a/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) 157 ± 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 subwoofer outp...

  • 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 ;; 6 :$ 6 8 / / 00 ;; )) & & $%/( 3,1 6 3 / pp u l1 533 l= 5 4 0 mm 8 2- 0 42 6 1 35 -03 -x x c able a ss y 4 way s 2 .5 p u l24 68 l= 5 4 0 mm ;; ) ) & & $%/(3,1 6 3 / pp 3 6-2028201-71-xx f f c c able 2 0 pin s p1 .2 5 l =2 00 mm 720$,1% 2$5' 720$,1% 2$5' 36 -30 2 806 1-71-xx f f c c able 30 pin...

  • Page 9: Block Diagram

    9 block diagram.

  • Page 10: 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 11: Amplifier Adjustment

    11 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 12: Pcb Layout

    12 pcb layout audio board composite video board.

  • Page 13

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

  • Page 14

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

  • Page 15

    15 front/center amplifier board - component side.

  • Page 16

    16 front/center amplifier board - copper side.

  • Page 17

    17 surround amplifier board - component side.

  • Page 18

    18 surround amplifier board - copper side.

  • Page 19

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

  • Page 20

    20 main board.

  • Page 21

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

  • Page 22

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

  • Page 23

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

  • Page 24

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

  • Page 25

    25 s-video board.

  • Page 26: Schematic Diagram

    26 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 27

    27 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 28

    28 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 29

    29 isc e c b 2sa1015 2sc1815 rn rn e c b 2sa1016k 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 30

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

  • Page 31

    31 power supply (stand by) e c b 2sc1815 (f) 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 32

    32 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 33

    33 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 34

    34 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 35

    35 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 rn rn rn front / center 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%. 3. Compon...

  • Page 36

    36 surround / back surround amplifier rn rn rn 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 resist ors : rn-ceramic case, mo-met a l oxide, unless other wise specified are carb...

  • Page 37

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

  • Page 38

    38 digital in & out.

  • Page 39

    39 e b c ss8050 main board note: 1. Resistors, unless otherwise specified, are 1/6w, 5%. 2. All ceramic capacitors, unless otherwise specified, are 50v, 10%..

  • Page 40

    40 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 41

    41 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 42

    42 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 43

    43 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 44: Ic Block Diagram

    44 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 45

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

  • Page 46

    46 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 47

    47 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 48

    48 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 49: Com Out/in

    49 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 50

    50 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 51

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

  • Page 52

    52 m61516fp multi-channel board: u6101 & u6102.

  • Page 53

    53 35 53 68 45 54 51 50 17 45 49 49 44 48 18 44 42 48 48 25 12 48 4 5 59 27 19 34 13 22 40 6 26 49 2 8 41 3 9 39 48 11 48 21 52 48 48 61 65 1 64 23 28 66 63 58 56 62 73 29 50 47 48 46 44 37 10 7 15 14 16 38 67 69 36 exploded view.

  • Page 54: Exploded View

    54 31 24 33 32 20 48 46 72 61 57 70 55 30 60 43 71 exploded view.

  • Page 55: Exploded View Parts List

    55 exploded view parts list item part no. Description qty. 1 10-0163017-01-00 plastic foot dome shape 4 2 10-0163045-72-00 linked goggle bezel 2 3 10-0163055-72-01 duo goggle bezel 2 4 10-0752001-00-10 window lens 1 5 10-0752005-72-00 volume bezel 1 6 10-0752007-72-00 video cover 1 7 10-0752022-02-0...

  • Page 56

    Item part no. Description qty. 46 14-0300600-52-00 self taping screw 3 x 6 p/h taptite 23 ni-plt type-b 47 14-0300603-54-00 taptite screw 3 x 6 b/h type-b blk 4 48 14-0300800-53-00 self tapping screw 3 x 8 b/b zinc 36 plated taptite-type 49 14-0300803-54-00 taptite screw 3 x 8 b/h type-b blk plt 65 ...

  • Page 57: Electrical  Parts List

    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 10...

  • Page 58

    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 l...

  • Page 59

    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...

  • Page 60

    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 re...

  • Page 61

    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 j...

  • Page 62

    62 reference no. Part no. Description j1008 26-6691386-00-16 fibre optic transmitter gp1fa550tz ics 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-c78...

  • Page 63

    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 ...

  • Page 64

    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 led d211 26-0012587-01-...

  • Page 65

    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 q6...

  • Page 66

    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 16...

  • Page 67

    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 ti...

  • Page 68

    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,c412...

  • Page 69

    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 250...

  • Page 70

    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 ics u4201 27-9496600-21-02 i.C. Quad bilateral...

  • Page 71: Packing Diagram & Parts List

    71 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 61-0763004-40-99...

  • Page 72: Version History

    72 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 mul...

  • Page 73: Ser

    73 ser vice manual t 763 surround sound receiver nad electronics ltd london.