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NAD T 975 C/AH, Service Manual, Page: 19 / 40

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NAD T 975 C/AH Service Manual Download Page 19

C401

R410

R406

R402

TRIG BOARD - SOLDER SIDE

TRIG BOARD - COMPONENT SIDE

VM1.0 2006/05/18

T975 SOFTCLIPPING TRIG BOARD

C403

P401B

R403

R411

R407

D403

R401

R405

D401 R409

S402

R413

D404

R412

R408

C404

S401

R404

S401

401

C402

D402

1

- 19 -

PCB LAYOUT

Summary of Contents for T 975 C/AH

Page 1: ...8 1 0 9 5 6 8 1 0 9 5 6 7 4 5 6 2 3 1 1 7521 6 17 51 7 21 7252172 7 5 3 0 1 1 1 9 6 7 5 3 0 1 1 1 9 6 6 9 1 11 03 5...

Page 2: ...RT NUMBER DESCRIPTION Rear Panel AH 20 11203 10 MDA T20AL 250V C 20 12103 20 MDA T10AL 250V AMP Board F101 F102 20 12632 00 T6 3AL 250V PSU Board F201 F204 20 12162 01 T1 6AL 250V NOTE AH North Americ...

Page 3: ...11 11 11 11 6855 5 6855 5 17 5 6855 6855 11 5217 11 5217 5 11 11 11 11 11 6855 5 6855 5 17 5 6855 6855 11 5217 138 7 138 7 138 7 138 7 138 7 138 7 138 7 138 7 138 7 138 7 138 7 138 7 138 7 138 7 9 9...

Page 4: ...ynamic power Maximum short term power per channel 8 ohms 220 W 23 4 dBW 4 ohms 385 W 25 9 dBW 2 ohms 450 W 26 5 dBW Damping factor 300 ref 8 ohms 50Hz Input Impedance R 1 Mohms C 180 pF Input sensitiv...

Page 5: ...is 17 6mV with down limit of 13 2mV and up limit of 22mV The alignment procedure is At first adjust RV102 Marked as Idling Current ADJ in the drawing below for a voltage of 17 6mV 1mV between Test po...

Page 6: ...monitor the voltage at TP1 J201 Adjust RV201 to get the voltage from negative to positive to ensure that the Fans are turned off Then run all 7 channels at 1kHz 0 5W at 4 ohms load monitor if the vol...

Page 7: ...01 RCA 1 2 P619B MOLEX 26 01 1089 P619B MOLEX 26 01 1089 1 2 3 4 5 6 7 8 t TR1 T973MKII B MAIN TRANSFORMER t TR1 T973MKII B MAIN TRANSFORMER 1 2 14 3 4 5 6 7 8 9 10 11 13 15 16 17 P612B MOLEX 26 01 10...

Page 8: ...0K R191 220K C150 180pF C150 180pF C152 15pF C152 15pF Q150 2SK170 Q150 2SK170 C1G1 100nF C1G1 100nF C160 1nF C160 1nF D183 BAV21 D183 BAV21 C161 1uF C161 1uF C155 10pF C155 10pF D182 4 7V D182 4 7V C...

Page 9: ...8 R122 100 R122 100 R113 100 R113 100 R138 10 R138 10 R126 2 7K R126 2 7K R157 0 22 R157 0 22 R134 1K R134 1K C146 100nF C146 100nF R10D 1K R10D 1K Q106 2SC2240 Q106 2SC2240 R117 180 R117 180 Q123 2SC...

Page 10: ...5 1K R248 1K R248 1K C284 10uF C284 10uF C218 47uF C218 47uF C250 2 2nF C250 2 2nF P205B CON16A P205B CON16A 1 3 5 7 9 11 13 15 2 4 6 8 10 12 14 16 Q232 2SC1815 Q232 2SC1815 C257 100nF C257 100nF R213...

Page 11: ...815 Q316 2SC1815 R338 10K R338 10K Q319 2SC1815 Q319 2SC1815 C301 47uF C301 47uF Q313 2SC1815 Q313 2SC1815 R340 10K R340 10K R345 10K R345 10K R330 10K R330 10K Q318 2SC1815 Q318 2SC1815 P302A 3PIN2 5...

Page 12: ...V C403 10u C403 10u R406 1K R406 1K J401 PY301 030 100 J401 PY301 030 100 R411 1K R411 1K S402 SSSU122NA1 S402 SSSU122NA1 5 6 4 1 2 3 R405 1K R405 1K D404 24V D404 24V R410 1K R410 1K R409 1K R409 1K...

Page 13: ...P801A 2PIN2 54 A100B P801A 2PIN2 54 A100B 2 1 W2 14 97301 02 W2 14 97301 02 RV501 0 5R030 RV501 0 5R030 W3 14 97301 03 W3 14 97301 03 P504B 2PIN3 96 C P504B 2PIN3 96 C 1 2 S801 SDDLB1027U RN S801 SDD...

Page 14: ...9PIN P605B MOLEX 2145 3215 TOP ENTRY 9PIN 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 BUS606 COPPER STRIP BUS606 COPPER STRIP P602B MOLEX 52207 RIGHT ANGLE SMT ZIF TOP CONTACT STYLE 16PIN P602B MOLEX 52207 RI...

Page 15: ...IN2 54 C J901 2PIN2 54 C 1 2 TP901 115deg THERMAL CIRCUIT BREAKER TP901 115deg THERMAL CIRCUIT BREAKER 1 2 TP904 115deg THERMAL CIRCUIT BREAKER TP904 115deg THERMAL CIRCUIT BREAKER 1 2 TP903 115deg TH...

Page 16: ...8 R157 R136 R186 R149 Q171 R143 Q191 CB101 L101 G 1 G 1 AMP BOARD COMPONENT SIDE C109 L103 R147 T975 AMPLIFIER MODULE C140 C171 D175 D173 R177 C107 R174 R106 R112 P1 01A Q137 R198 R194 Q162 R195 C103...

Page 17: ...60 C206 R281 b Q232 R258 HS203 Q201 BUS206 BUS204 C205 C204 b BUS201 BR201 b C201 C203 C202 T975POW VM1 0 AGND FAN1 J202 FAN2 FAN3 68V 68V ACOFF 18V P203B 18V DGND R257 e Q230 R256 R255 R231 e R230 Q2...

Page 18: ...50 P302A 332 D309 D310 R344 330 R316 315 309 R330 R331 310 R323 316 CH 3 302 D303 R310 R338 324 R339 VM1 0 2006 05 18 D301 R343 R329 308 322 R308 334 CH 1 R347 R349 D312 R336 333 D302 R337 323 CH 2 R3...

Page 19: ...TRIG BOARD SOLDER SIDE TRIG BOARD COMPONENT SIDE VM1 0 2006 05 18 T975 SOFTCLIPPING TRIG BOARD C403 P401B R403 R411 R407 D403 R401 R405 D401R409 S402 R413 D404 R412 R408 C404 S401 R404 S401 401 C402 D...

Page 20: ...1 P610B 9 1 9 P609B 1 2 FAN3 DGND 9 9 1 P623 VM1 0 2006 05 18 CONNECTION BOARD SOLDER SIDE T975 CONNECTION BOARD FAN3 8 1 10 AGND FAN1 FAN2 8 1 68V 68V ACOFF 18V 18V DGND 1 CONNECTION BOARD COMPONENT...

Page 21: ...T975 POWER LED BOARD POWER LED BOARD VM1 0 2006 05 18 D701 P701A 1 21 PCB LAYOUT...

Page 22: ...T975 SWITCH BOARD SWITCH BOARD VM1 0 2006 05 18 1 P801A S801 1 22 PCB LAYOUT...

Page 23: ...TP BOARD TP901 901 T975 TP BOARD VM1 0 2006 05 18 TP902 TP904 TP903 23 PCB LAYOUT...

Page 24: ...sistor 2SC2362 31 02362 00 TO92 100 ECB Q106 Transistor 2SC2240 GR 31 02240 00 TO92 100 ECB Q107 Transistor 2SC1815 GR 31 01815 00 TO92 100 ECB Q108 Transistor 2SC1815 GR 31 01815 00 TO92 100 ECB Q109...

Page 25: ...R119 Metal Film Resistor 100 1 6W 5 07 20101 50 AX 200X 080 031 R120 Metal Film Resistor 100 1 6W 5 07 20101 50 AX 200X 080 031 R121 Metal Film Resistor 33K 1 6W 1 07 23302 50 AX 200X 080 031 R122 Me...

Page 26: ...etal Film Resistor 2 2meg 1 6W 5 07 20225 50 AX 200X 080 031 R1A3 Metal Film Resistor 470 1 6W 5 07 20471 50 AX 200X 080 031 R1A4 Metal Film Resistor 1K 1 6W 5 07 20102 50 AX 200X 080 031 R1A5 Metal F...

Page 27: ...0 035 C147 Polyester capacitor 470nF 10 63V 25 47461 01 RAD 300X 150 LS 200 036 C148 Polyester capacitor 470nF 10 63V 25 47461 01 RAD 300X 150 LS 200 036 C150 Ceramic Capacitor 180pF 10 1KV 05 18113 0...

Page 28: ...8 2V 1 2W 33 18209 00 DAX 300X 080 031 D212 Zener Diode 5 1V 1 2W 33 15109 00 DAX 300X 080 031 D213 Zener Diode 4 3V 1 2W 33 14309 00 DAX 300X 080 031 D214 Zener Diode 4 3V 1 2W 33 14309 00 DAX 300X 0...

Page 29: ...31 00667 00 TO92 100 ECB Q228 Transistor 2SC1815 GR 31 01815 00 TO92 100 ECB Q229 Transistor 2SC1815 GR 31 01815 00 TO92 100 ECB Q230 Transistor 2SC1815 GR 31 01815 00 TO92 100 ECB Q231 Transistor 2S...

Page 30: ...102 50 AX 200X 080 031 R247 Metal Oxide Film Resistor 47 1 2W 5 07 30470 00 AX 400X 080 031 R248 Metal Film Resistor 1K 1 6W 5 07 20102 50 AX 200X 080 031 R249 Metal Oxide Film Resistor 47 1 2W 5 07 3...

Page 31: ...X 200X 080 031 R2F2 Metal Film Resistor 20K 1 6W 5 07 20203 50 AX 200X 080 031 R2F3 Metal Film Resistor 10K 1 6W 5 07 20103 50 AX 200X 080 031 R2F4 Metal Film Resistor 10K 1 6W 5 07 20103 50 AX 200X 0...

Page 32: ...4 C252 Polyester capacitor 2 2nF 10 250V 25 22222 00 RAD 300X 150 LS 200 034 C253 ALU Electrolytic Capacitor 22000uF 80V 105 06 22381 00 CPCYL1 D1 420 LS 880 079 C254 ALU Electrolytic Capacitor 22000u...

Page 33: ...02 LED BL BUBB4274 C 33 50565 20 DYL D 200 LS 100 039 D303 LED BL BUBB4274 A 33 50565 00 DYL D 200 LS 100 039 D303 LED BL BUBB4274 B 33 50565 10 DYL D 200 LS 100 039 D303 LED BL BUBB4274 C 33 50565 20...

Page 34: ...Film Resistor 10K 1 6W 5 07 20103 50 AX 200X 080 031 R319 Metal Film Resistor 10K 1 6W 5 07 20103 50 AX 200X 080 031 R320 Metal Film Resistor 10K 1 6W 5 07 20103 50 AX 200X 080 031 R321 Metal Film Res...

Page 35: ...06 10051 01 CPCYL1 D 200 LS 200 031 CONNECTOR P401B HOUSING 12PIN2 0 C 13 22012 00 J401 12V TRIG IN PY301 030 100 17 07001 00 SWITCH S401 SWITCH SSSU142NA1 11 05402 00 SLIDESWITCHES SSSU121700 S402 S...

Page 36: ...PHB 2 0A 12Y P619B Connector MOLEX 5145 NCH TOP ENTRY 8PIN 13 25008 00 P620B Connector MOLEX 5145 NCH TOP ENTRY 8PIN 13 25008 00 P621B Connector 2PIN2 54 13 22502 00 P622 Connector 2PIN2 54 13 22502...

Page 37: ...AWG double insulated blue 300V 105C 1672 L 600mm 14 97301 01 Connector Ribbon One terminal KST FDFD2 187 5 another terminal KST FDFD2 187 8 wire 16AWG double insulated blue 300V 105C 1672 L 150mm 14 9...

Page 38: ...6 6 6 6 6 35 6 3 6 6 3 6 3 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 6 5 6 5 5 6 6 5 75 75 6 75 75 6 7 6 6 6 3 3 3 3 3 3 3 6 3 6 6 6 6 6 6 3 6 6 6 6 6 6 6 3 3 6 6...

Page 39: ...ld gray 1 02 03003 10 Bindding Post AH Version AH 7 F004 77 009003 1 Power Button 1 A006 70 019005 1 R CA 7 F005 77 062002 0 Power Button Bezel 1 A007 09 01502 00 Pot 7 F006 77 062001 0 Led Lens Bezel...

Page 40: ...40 PACKING DIAGRAM...

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