NAD C275BEEC/AH Service Manual
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NAD C275BEEC/AH Service Manual

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C275BEE C/AH
STEREO AMPLIFIER

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Summary of Contents for NAD C275BEEC/AH

  • Page 1 C275BEE C/AH STEREO AMPLIFIER...
  • Page 2 CONTENTS FRONT PANEL/REAR PANEL VIEW SPECIFICATIONS ALIGNMENT PROCEDURE/ALIGNMENT POINTS WIRING DIAGRAM SCHEMATIC DIAGRAM 7-12 PCB LAYOUT 13-18 ELECTRICAL PARTS LIST 19-32 EXPLODED VIEW EXPLODED VIEW PARTS LIST PACKING DIAGRAM SERVICE SAFETY PRECAUTIONS 1. Replacing the Fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE.
  • Page 3 - 3 -...

  • Page 4: Specifications

    SPECIFICATIONS FIXED IN, SPEAKER OUT Continuous average power , stereo,8 and 4 ohms at rated thd ,20-20k > 150W Continuous average power 8 ohms , bridge mode > 330W Rated thd, 20-20k, SMPTE and CCIF IMD, DIM 100 < 0.009% Clipping power ( 1% thd at 1kHz) >170W IHF dynamic power 8 ohms...

  • Page 5: Alignment Procedure

    ALIGNMENT PROCEDURE A. DC OFFSET VOLTAGE The DC OFFSET between OFFSET Test Point and AGND must be within 0+/-20mV. B. IDLING CURRENT The idling current in the output stage of the poweramp should be set to 30mA+/-5mA per pnp-npn transistor pair (This means the mid point voltage is 6.6mV with down limit of 5.5mV and up limit of 7.7mV).

  • Page 6: Wiring Diagram

    WIRING DIAGRAM FROM PAD1-6 AC INLET AC INLET P901B P901B BINDING POST BOARD P203B P203B TO L&R P102B P208A P208A PAD3 PAD2 PAD5 PAD4 TO P901B P101B P101B P206B P206B P205A P205A P102B P102B P103B P103B P207B P207B PAD1 P101B P101B P103B P103B...
  • Page 7 SCHEMATICS DIAGRAM Q101 Q101 R194 R194 KSC2690A KSC2690A +80V R172 R172 R173 R173 R174 R174 R175 R175 C141 C141 D127 D127 D128 D128 R140 R140 R141 R141 R153 R153 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 R184 R184 R189 R189 R163 R163...
  • Page 8 SCHEMATICS DIAGRAM HS201 HS201 HS202 HS202 Q203 Q203 R207 R207 R208 R208 MPSA92 MPSA92 R202 R202 P201B P201B BR201 BR201 BR202 BR202 70-004003-1 70-004003-1 70-004003-1 70-004003-1 R204 R204 KBU8D KBU8D KBU8D KBU8D FOR BR201&TH201 FOR BR202&TH202 P204A P204A TH201 TH201 C203 C203 BT151-500R...
  • Page 9 SCHEMATICS DIAGRAM P901A P901A +15V +15V D909 D909 R917 R917 AGND 1N4007 1N4007 +5.6V THERMAL PROT Q909 Q909 STBY 2SD667 2SD667 DGND 6PIN2.54-A200B 6PIN2.54-A200B R915 R915 IC902A IC902A R916 R916 G901 G901 4.7K 4.7K CD4011BCN CD4011BCN R910 R910 GND-8 GND-8 C903 C903 10nF...
  • Page 10 SCHEMATICS DIAGRAM C405 C405 D402 D402 D404 D404 F401 F401 IC402 IC402 1N5819 1N5819 D409 D409 /Y Type 1N5822 1N5822 LM7805CT LM7805CT 1N4148 1N4148 T1AL/250V T1AL/250V +5.6VD R401 R401 C403 C403 TR402 TR402 10nF 10nF /X Type C406 C406 220uF 220uF /16V C407...
  • Page 11 SCHEMATICS DIAGRAM (01-37506-00) R605 R605 R606 R606 Q603 Q603 Q604 Q604 2SA1312 2SA1312 2SA1312 2SA1312 Q605 Q605 C607 C607 Q606 Q606 C608 C608 R626 R626 2SC3324 2SC3324 100nF 100nF 2SC3324 2SC3324 100nF 100nF 150K 150K R625 R625 150K 150K R607 R607 R608 R608...
  • Page 12 SCHEMATICS DIAGRAM BP901A BINDING POST P901B P901B BP901B BP901B BINDING POST BP901C BP901C BINDING POST 6PIN3.96-C 6PIN3.96-C BP901D BP901D BINDING POST - 12 -...
  • Page 13 PCB LAYOUT &%((&%(( $03 %2$5'  &20321(17 6,'( &%((&%(( 3RZHU$03 %RDUG 90 2FW   5 &% &% 5 5 ** 5 5 5 5 5 5 5 5 5 & 5$ & +6 & 5 & & & 4 4 4 4...
  • Page 14 PCB LAYOUT &%(( 0$,1 %2$5'  &20321(17 6,'( 3$ 6 6 6 6 - 3$' 3$' 3$' 3$' & 5 59 ' & & & & 4 & ,& ,& & & 5 & 5 5 & & 5 & & & 5...
  • Page 15 PCB LAYOUT &%((%(( 67$1'%< %2$5'  &20321(17 6,'( &%((%(( 6WDQGE\ %RDUG 90 2FW   ' 3 3 3OV FXW +) SLQV : : : ZKHQ XVLQJ LW 3% 5/ 75 3% & 5 75 : ' : & & & $77(17,21 ,&...
  • Page 16 PCB LAYOUT (01-37506-00) &%((&%(( 2SDPS %2$5'  &20321(17 6,'( 4 4 &%((&%(( 2SDPS %2$5'  62/'(5 6,'( - 16 -...
  • Page 17 PCB LAYOUT &%(( ',63/$< %2$5' &%(( ',63/$< %2$5' 90 2FW   & & 5 & 5 4 4 3$ 5 ' %OXH $PEHU ' ' ' ' ' 'JQG ' - ' ' & 6 5 5 3$ & 5 $*1' 4...
  • Page 18 PCB LAYOUT &%((&%(( %LQGLQJ 3RVW %RDUG  &20321(17 6,'( 3% &%((&%(( %LQGLQJ 3RVW %RDUG 90 2FW   &%((&%(( %LQGLQJ 3RVW %RDUG  62/'(5 6,'( - 18 -...

  • Page 19: Electrical Parts List

    ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT 01-37501-00 PCB1 BOARD (POWERAMP MODULE) DIODE D101 Switch Diode 1N4148 33-44148-00 DAX/.300X.080/.031 D102 Switch Diode 1N4148 33-44148-00 DAX/.300X.080/.031 D103 Switch Diode 1N4148 33-44148-00 DAX/.300X.080/.031 D104 Switch Diode 1N4148 33-44148-00 DAX/.300X.080/.031 D105 Switch Diode 1N4148...
  • Page 20 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT Q133 Transistor KSC2690AYSTU 31-02690-00 TO126/90/ECB Q135 Transistor KSC2690AYSTU 31-02690-00 TO126/90/ECB Q136 Transistor KSC2690AYSTU 31-02690-00 TO126/90/ECB Q137 Transistor KSA1220AYSTU 31-01220-00 TO126/90/ECB Q138 Transistor KSA1220AYSTU 31-01220-00 TO126/90/ECB Q139 Transistor 2SA2121-O J31-02121-00 TO264/215/BCE Q140 Transistor 2SA2121-O...
  • Page 21 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT R127 Metal Film Resistor 10Ω, 1/6W, 5% 07-20100-50 AX/.200X.080/.031 R128 Metal Film Resistor 10Ω, 1/6W, 5% 07-20100-50 AX/.200X.080/.031 R129 Metal Film Resistor 10Ω, 1/6W, 5% 07-20100-50 AX/.200X.080/.031 R130 Metal Film Resistor 1KΩ, 1W, ±1% 07-21001-01 AX/.600X.125/.039...
  • Page 22 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT R184 Metal Film Resistor 470Ω, 1/6W, 5% 07-20471-50 AX/.200X.080/.031 R185 Metal Film Resistor 47KΩ, 1/6W, 5% 07-20473-50 AX/.200X.080/.031 R186 Metal Film Resistor 22KΩ, 1/6W, 5% 07-20223-50 AX/.200X.080/.031 R187 Metal Film Resistor 2K2Ω, 1/6W, 5% 07-20222-50 AX/.200X.080/.031...
  • Page 23 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT C102 Polyester capacitor 100nF, ±5%, 250V 25-10422-01 RAD/CAP/.300X.150/LS.200/.031 C103 ALU Electrolytic Capacitor 10uF/50V, ±20%, 105 06-10051-01 CPCYL1/D.200/LS.200/.031 C104 Ceramic Capacitor 33pF, ±5%, 1KV 05-33013-02 CPAX/.200X.100/.031 C105 ALU Electrolytic Capacitor 10uF/100V, ±20%, 105 06-10012-01 CPCYL1/D.300/LS.200/.031 C107...
  • Page 24 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT RV102 SEMI POT 500Ω, vertical type 09-02501-02 VRES17 RV103 SEMI POT 10KΩ, vertical type 09-02103-02 VRES17 RV104 SEMI POT 100Ω, vertical type 09-02101-01 VRES17 CONNECTOR P101B HOUSING 11PIN2.54-C 13-22511-01 BLKCON.100/VH/TM1SQS/W.300/11 P102B HOUSING 5PIN2.54-C...
  • Page 25 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT RESISTOR R201 Metal Film Resistor 10KΩ, 1/6W, 5% 07-20103-50 AX/.200X.080/.031 R202 Metal Film Resistor 22KΩ, 1/6W, 5% 07-20223-50 AX/.200X.080/.031 R203 Metal Film Resistor 22KΩ, 1/6W, 5% 07-20223-50 AX/.200X.080/.031 R204 Metal Film Resistor 1KΩ, 1/6W, 5% 07-20102-50 AX/.200X.080/.031...
  • Page 26 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT R258 Metal Film Resistor 100KΩ, 1/6W, 5% 07-20104-50 AX/.200X.080/.031 R259 Metal Film Resistor 100KΩ, 1/6W, 5% 07-20104-50 AX/.200X.080/.031 R260 Metal Film Resistor 330KΩ, 1/6W, ±5% 07-20334-50 AX/.200X.080/.031 R263 Metal Film Resistor 220Ω, 1/6W, 5% 07-20221-50 AX/.200X.080/.031...
  • Page 27 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT C242 Polyester capacitor 100nF, ±5%, 63V 25-10461-07 RAD/CAP/.300X.150/LS.200/.031 C243 Ceramic Disc Capacitor 10pF, ±5%, 1KV 05-10013-01 CPAX/.200X.100/.031 C244 ALU Electrolytic Capacitor 100uF, 6.3V, ±20%, 105 06-10160-07 CPCYL1/D.200/LS.200/.031 C245 ALU Electrolytic Capacitor 06-10051-01 CPCYL1/D.200/LS.200/.031 10uF/50V, ±20%, 105...
  • Page 28 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT UL1015#16AWG, L=120mm(black wire), to P901B WIRE 14-27606-00 L=100mm(orange/white/blue/ red wire) G201 Ground Solder Tap GND-8 32-28042-00 SWITCH S201 SWITCH SSSU122NA1 J11-05202-10 SLIDESWITCHES/SSSU141500 S202 SWITCH SSSU122NA1 J11-05202-10 SLIDESWITCHES/SSSU141500 S203 SWITCH SSSU122NA1 J11-05202-10 SLIDESWITCHES/SSSU141500 S204...
  • Page 29 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT RELAY RL401 RELAYS DH1U5VDC TV-8 DH5D1-O A12-02101-01 FUSE F401 FUSE T1AL/250V A20-12102-00 FUSE HOLDER F401 FUSE HOLDER LS-PTF-78 (CQ-200C) A20-20000-06 RAD/.1000X.400/LS.850/.066 CONNECTOR J401 JACK HS4-CI9120-B009V1-M032 32-26304-00 J402 JACK KY187 32-24804-00 P402B HOUSING 6PIN2.54-C...
  • Page 30 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT R914 Metal Film Resistor 1KΩ, 1/6W, 5% 07-20102-50 AX/.200X.080/.031 R915 Metal Film Resistor 4.7KΩ, 1/6W, ±5% 07-20472-50 AX/.200X.080/.031 R916 Metal Film Resistor 1KΩ, 1/6W, 5% 07-20102-50 AX/.200X.080/.031 R917 Metal Film Resistor 1KΩ, 1/6W, 5% 07-20102-50 AX/.200X.080/.031...
  • Page 31 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT RESISTOR R601 Chip Resistor 1megΩ ,1/8W,±5% 07-90105-00 SM/R_0603 R602 Chip Resistor 1megΩ ,1/8W,±5% 07-90105-00 SM/R_0603 R603 Chip Resistor 220Ω ,1/8W,±5% 07-90221-00 SM/R_0603 R604 Chip Resistor 220Ω ,1/8W,±5% 07-90221-00 SM/R_0603 R605 Chip Resistor 1KΩ...
  • Page 32 ELECTRICAL PARTS LIST DESIGNATOR DESCRIPTION PART TYPE PART NUMBER FOOTPRINT UL1672#16AWG , red, Switch to Fuse holder WIRE A14-37501-00 L=100mm UL1672#16AWG,blue, AC INLET to J401 WIRE A14-37501-01 L=460mm UL1672#16AWG , red, Fuse holder to J402 WIRE A14-37501-02 L=380mm UL2468#24AWG*5C&6C,T P206B--P101B(L CH) WIRE wo terminal: XHB2.54 11pin, 14-27611-00...

  • Page 33: Exploded View

    EXPLODED VIEW S002 S011 T001 R004 C006 R005 R006 S011 S006 S009 C004 A002 R002 A005 R003 S015 S014 A001 S013 R007 S005 C005 S005 S002 C011 S007 A004 C009 R001 A003 S016 S008 S002 C012 S002 S010 F012 S003 S003 S002 F011...

  • Page 34: Exploded View Parts List

    EXPLODED VIEW PARTS LIST REF.NO PART NO. DESCRIPTION Qty. REF.NO PART NO. DESCRIPTION Qty. 01-37501-00 Poweramp Module Board F008 76-062001-1 LED Lens A001 70-124010-1 Main Heatsink F009 79-124003-0 CR Foam C A002 85-010001-0 Spacer F010 79-062001-0 Rubber Pad A003 66-018005-0 Thermal Switch Clamping F011 01-27513-00...

  • Page 35: Packing Diagram

    PACKING DIAGRAM 5()1 3DUW 1R 'HVFULSWLRQ 4W\  &%HH $+ 9HUVLRQ $+  &%HH & 9HUVLRQ &  &%HH &7 9HUVLRQ &7  1RQ:RYHQ &ORWK  3RO\EDJ  3RO\IRDP (QG &DS   3RO\IRDP (QG &DS  -$ $& &RUG $+ RU $ -$ $&...
  • Page 36 VERSION HISTORY DATE CIRCUIT CHANGE Improve the Q147 Power Dissipation Dec. 10. 08 1) R186 changed from 10K to 22K 2) R187 changed from 510 Ohms to 2.2K Correction for Power Off pop noise Dec. 13. 08 C245/C253 changed from 100nF to 10uF/50V Electrolytic Capacitor Change Top Cover &...

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