NAD T955 AH, Service Manual

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 9 7 5 3 0 1 1 9 9 11 03 5...

Page 2: ...SE REFERENCE NO PART NUMBER DESCRIPTION Rear Panel AH 20 12153 10 MDA T15AL 250V C 20 12702 20 MDA T7AL 250V POWER SUPPLY Board F201 F220 20 12632 00 T6 3AL 250V NOTE AH North American version only C...

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: ...F dynamic power Maximum short term power per channel 8 ohms 150 W 22 dBW 4 ohms 250 W 24 dBW 2 ohms 330 W 25 2 dBW Damping factor 250 ref 8 ohms 50Hz Input Impedance R 20K C 380 pF Input sensitivity f...

Page 5: ...nit for 5 minutes let idling current settled and then readjust to 4mV 1mV Pls note Though the idling current is set as 4mV 1mV during the adjustment due to the influence of varied ambient temperature...

Page 6: ...TO CH1 P101A TO CH2 P101A TO CH3 P101A TO CH4 P101A TO CH5 P101A FROM P204B FROM P206B FROM P208B FROM P210B FROM TRANSFORMER FROM TRANSFORMER FROM TRANSFORMER FROM TRANSFORMER FROM TRANSFORMER CH1 CH...

Page 7: ...D130 1N4148 Q118 2SA1015 Q118 2SA1015 C114 1uF C114 1uF D125 1N4148 D125 1N4148 R134 1K R134 1K IC104 TL431 IC104 TL431 2 3 1 C102 220uF C102 220uF C129 68pF C129 68pF R138 27K R138 27K R1H2 N I R1H2...

Page 8: ...C222 6800uF HS203 70 004003 1 HS203 70 004003 1 C211 6800uF C211 6800uF F203 T6 3AL 250V F203 T6 3AL 250V R249 10K R249 10K R266 100K R266 100K P209B 5PIN3 96 C P209B 5PIN3 96 C 1 2 4 5 3 C234 10uF C...

Page 9: ...R311 150 D308 1N4148 D308 1N4148 Q303 2SA1015 Q303 2SA1015 C303 33uF C303 33uF D306 BL BUBB4274 D306 BL BUBB4274 R326 1K R326 1K D302 BL BUBB4274 D302 BL BUBB4274 R317 150 R317 150 D305 BL BUBB4274 D3...

Page 10: ...01 220nF C501 220nF W501 10mm JUMPER W501 10mm JUMPER 1 2 D501 1N4148 D501 1N4148 P502B KY250 P502B KY250 1 2 P501B PCFS2508 P501B PCFS2508 1 2 W503 7 5mm JUMPER W503 7 5mm JUMPER 1 2 RL501 832A 1A C...

Page 11: ...ND 5VD SC S402 SSSU122NA1 S402 SSSU122NA1 5 6 4 1 2 3 J401 PY301 030 100 J401 PY301 030 100 P401A 4PIN2 54 A300B P401A 4PIN2 54 A300B 2 3 4 1 S401 SSSU122NA1 S401 SSSU122NA1 5 6 4 1 2 3 11 SCHEMATICS...

Page 12: ...UL1015 20AWG 230mm YEL UL1015 20AWG 200mm RED UL1015 20AWG 200mm BLK UL1015 20AWG 200mm YEL UL1015 20AWG 200mm RED UL1015 20AWG 200mm YEL UL1015 20AWG 180mm RED UL1015 20AWG 180mm BLK UL1015 20AWG 180...

Page 13: ...1A0 R1A2 R134 R190 R177 CB101 Q128 D119 R1A4 R183 R180 R1K4 R193 R189 C162 Q132 Q130 R1A1 R191 R199 R185 L103 C155 R173 R132 Q141 R159 HS101 Q123 C138 R1F1 C137 R181 C129 D113 RV103 C150 R157 R155 R19...

Page 14: ...202 R227 R233 BR202 AC2 C202 TH202 R210 AC1 R205 R211 R208 R209 Q 201 R212 Q204 R206 C204 C205 Q202 R204 R202 F203 R201 C203 R203 D202 D201 F208 HS201 AC2 F210 AC1 BR201 C201 F201 T955POWER C228 C230...

Page 15: ...BYLED 5VD LED5 LED1 R309 R308 Q305 R325 R307 Q304 R306 R311 Q307 R326 R310 Q306 W303 VM1 0 08 18 2006 R314 Q309 R327 R313 Q308 R312 R317 Q311 R328 R316 Q310 R315 SC BOARD TO PSU DISPLAY BOARD D308 C30...

Page 16: ...STANDBY BOARD N I Insert W502 P506B P502B P505B W505 W 5 0 3 W504 Insert 230V N I W501 120V RL501 D501 AC1 5VD AC2 RELAY P504B TP STANDBY BOARD P501B P4 P3 W 5 0 2 W 5 0 1 N I Insert N I Insert W505 W...

Page 17: ...T955 TRIGGER BOARD VM1 0 08 18 2006 TRIGGER BOARD TO PSU BOARD P401A J401 S402 S401 17 PCB LAYOUT...

Page 18: ...1 P701B VM1 0 08 18 2006 T955 POWER LED BOARD POWER LED BOARD D701 3 18 PCB LAYOUT...

Page 19: ...POWER SWITCH BOARD S901 VM1 0 08 18 2006 T955 SWITCH BOARD P1 P2 19 PCB LAYOUT...

Page 20: ...080 031 D126 Switch Diode 1N4148 33 44148 00 DAX 300X 080 031 D127 Zener Diode 3 3V 1 2W 33 13309 00 DAX 300X 080 031 D128 Zener Diode 3 3V 1 2W 33 13309 00 DAX 300X 080 031 D129 Switch Diode 1N4148 3...

Page 21: ...134 Transistor MPSA06 31 00006 00 TO92 100 EBC Q134 Transistor MPSA42 31 00042 00 TO92 100 EBC Q134 Transistor 2N4401 31 04401 00 TO92 100 EBC Q135 Transistor MPSA56 31 00056 00 TO92 100 EBC Q135 Tran...

Page 22: ...080 031 R125 Metal Film Resistor 390K 1 6W 5 07 20394 50 AX 200X 080 031 R126 Metal Film Resistor 100K 1 6W 5 07 20104 50 AX 200X 080 031 R127 Metal Film Resistor 100K 1 6W 5 07 20104 50 AX 200X 080 0...

Page 23: ...AX 400X 100 031 R185 Metal Film Resistor 18 1 4W 5 07 20180 51 AX 400X 100 031 R186 Metal Film Resistor 18 1 4W 5 07 20180 51 AX 400X 100 031 R187 Metal Oxide Film Resistor 1 1 2W 5 07 30109 02 AX 60...

Page 24: ...0 031 R1X3 Metal Film Resistor 2 2K 1 6W 5 07 20222 50 AX 200X 080 031 R1X4 Metal Film Resistor 6 8K 1 6W 1 07 26801 50 AX 200X 080 031 R1X5 Metal Film Resistor 1K 1 6W 1 07 21001 50 AX 200X 080 031 R...

Page 25: ...F 10 1KV 05 22113 01 CPAX 200X 100 036 C138 Ceramic Capacitor 220pF 10 1KV 05 22113 01 CPAX 200X 100 036 C139 ALU Electrolytic Capacitor 4 7uF 50V 20 105 06 47951 05 CPCYL D 200 LS 200 031 C140 Polyes...

Page 26: ...BINDING POST ASSY C 02 03003 20 BP101 BINDING POST ASSY AH 02 03003 10 5 3 5 19 05005 00 D201 RECTIFY DIODES 1N4007 33 24007 01 DAX 400X 100 039 D202 RECTIFY DIODES 1N4007 33 24007 01 DAX 400X 100 039...

Page 27: ...tor 15K 1 4W 5 07 20153 51 AX 400X 100 031 R203 Metal Film Resistor 1K 1 6W 5 07 20102 50 AX 200X 100 031 R204 Metal Film Resistor 10K 1 6W 5 07 20103 50 AX 200X 100 031 R205 Metal Film Resistor 22K 1...

Page 28: ...0 031 R254 Metal Film Resistor 100 1 6W 5 07 20101 50 AX 200X 100 031 R255 Metal Film Resistor 22K 1 6W 5 07 20223 50 AX 200X 100 031 R256 Metal Film Resistor 22K 1 6W 5 07 20223 50 AX 200X 100 031 R2...

Page 29: ...S 200 031 C233 Polyester capacitor 10nF 10 250V 25 10322 01 RAD CAP 300X 150 LS 200 031 C234 ALU Electrolytic Capacitor 10uF 100V 20 105 06 10012 01 CPCYL1 D 200 LS 200 031 C235 ALU Electrolytic Capac...

Page 30: ...AL 250V 20 12632 00 T6 3AL 250V F213 FUSE T6 3AL 250V 20 12632 00 T6 3AL 250V F214 FUSE T6 3AL 250V 20 12632 00 T6 3AL 250V F215 FUSE T6 3AL 250V 20 12632 00 T6 3AL 250V F216 FUSE T6 3AL 250V 20 12632...

Page 31: ...00 TO92 100 GOI Q303 Transistor 2SA1015 GR 31 01015 00 TO92 100 ECB Q304 Transistor KRC102M AT P 31 00102 00 TO92 100 GOI Q304 Transistor DTC114ESA 31 00114 00 TO92 100 GOI Q305 Transistor 2SA1015 GR...

Page 32: ...Electrolytic Capacitor 100uF 16V 20 105 06 10111 07 CPCYL1 D 200 LS 200 031 C302 ALU Electrolytic Capacitor 33uF 16V 20 85 06 33011 00 CPCYL1 D 200 LS 200 031 C303 ALU Electrolytic Capacitor 33uF 16V...

Page 33: ...02 20 FUSE HOLDER HTB 32I 20 20000 03 AC Inlets R 301 00 17 07003 01 TRANSFORMER 18 95515 00 Connector Ribbon One terminal KST FDFD2 187 8 another terminal KST FDFD2 250 wire 16AWG double insulated wh...

Page 34: ...4 A001 A003 A002 S002 S004 S003 A004 S001 S001 S001 S005 A005 A006 S001 34 EXPLODED VIEW...

Page 35: ...S006 S007 TR01 TR05 TR02 TR03 S007 S008 S009 TR04 35 EXPLODED VIEW...

Page 36: ...2 F003 F004 F005 F006 F007 F008 F009 F010 F011 F012 F006 F007 C010 C011 R001 T001 C013 S002 S010 S010 S010 S010 S010 S010 S010 S010 S011 S011 S016 S013 S017 S012 S010 S015 S015 S014 S014 S010 S001 S00...

Page 37: ...66 010010 0 BRACKET 6 2 S001 61 023208 0 Self Taping Screw 60 C005 01 95504 00 Trigger Board 1 S002 61 023506 1 Self Taping Screw 15 C006 20 20000 03 Fuse Holder 1 S003 61 023110 0 Self Taping Screw 1...

Page 38: ...Polyfoam 1 3 15 10230 20 AC Cord 1 4 90 062004 0 EPE PAD 1 5 00 95500 20 T955 Unit 1 6 90 062002 0 Non woven Cloth 1 7 90 062003 0 EPE Bag 1 8 90 062001 0 Polyfbag 1 10 89 062003 0 Top Polyfoam 1 9 9...