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NAD C275BEEC/AH Service Manual Download Page 36

CIRCUIT CHANGE

DATE

Impr

o

ve the Q147 Power Dis

si

pation

1) R186 changed from 10K to 22K
2) R187 changed from 510 Ohms to 2.2K

Dec. 10. 08

Correction for Power Off pop noise

C245/C253 changed from 100nF to 10uF/50V Electrolytic Capacitor

 

 

Change Top Cover & Chassis for better fit   

 from serial number: H02C275BEEG02145 

    

Dec. 13. 08

VERSION HISTORY

Feb. 2010

Summary of Contents for C275BEEC/AH

Page 1: ...L A U N A M E C I V R E S C275BEE C AH C275BEE H A C STEREO AMPLIFIER STEREO AMPLIFIER...

Page 2: ...O PART NUMBER DESCRIPTION Rear Panel AH A20 12103 00 Littelfuse618 T10AL 250V C A20 12702 20 Littelfuse618 T5AL 250V STANDBY Board F401 A20 12102 00 Littelfuse618 T1AL 250V NOTE AH North American vers...

Page 3: ...45 6550 45 3 0 503 40 5 11 503 30 5 1 3 3 1 7 8 165 4 5 165 165 7 0 530 3 0 40 5 11 7 53 3 165 4 4 0 650 7 53 3 165 64 0 3 41 34 4 165 108 3 48 5 30 5 1 0 530 4 3 3 1 0 530 4 3...

Page 4: ...ec 1 ohm 50A S N A wtd re 1 W 102 dB S N A Wtd re 150W 123 dB Damping factor re 8 ohms 50 Hz and 1kHz 180 Frequency response 20 20k 0 1 dB Frequency response 3dB 3Hz 100 kHz Input impedance Fixed In 1...

Page 5: ...t settled and then readjust to 6 6mV 1mV This is a no load adjustment Pls note Though the idling current is set as 6 6mV 1mV during the adjustment due to the influence of varied ambient temperature an...

Page 6: ...03B TO RIGHT P101B FROM P207B FROM P205A FROM P208A MAIN BOARD BINDING POST BOARD STANDBY BOARD DISPLAY BOARD PAD1 FROM P902A TO P203B AC INLET AC INLET 1 2 P902A P902A P402B P402B J401 J401 P102B P10...

Page 7: ...10K R102 10K C146 10uF C146 10uF D124 N I D124 N I CB101 ST 22 90C L TYPE CB101 ST 22 90C L TYPE 1 2 C145 10uF C145 10uF R144 3 3 R144 3 3 C103 10uF C103 10uF D111 18V D111 18V C150 10uF C150 10uF R1...

Page 8: ...Pad R232 22K R232 22K R267 47K R267 47K R205 1K R205 1K C213 2200uF C213 2200uF Q204 MPSA42 Q204 MPSA42 D213 1N4148 D213 1N4148 TH202 BT151 500R TH202 BT151 500R 3 1 2 R238 10K R238 10K R261 N I R261...

Page 9: ...Q906 DTC114ESA Q906 DTC114ESA IC901 EM78P153SP S J IC901 EM78P153SP S J P50 1 P67 2 P66 3 Vdd 4 P65 OSCI 5 P64 OSCO 6 P63 RST 7 P62 TCC 8 P61 9 P60 INT 10 Vss 11 P53 12 P52 13 P51 14 R902 130 R902 130...

Page 10: ...INLET U2 AC INLET 1 2 C401 100nF C401 100nF D406 1N4148 D406 1N4148 C406 220uF C406 220uF D401 FR107 D401 FR107 D403 4 7V D403 4 7V R404 150 R404 150 RL401 DH1U5VDC TV 8 RL401 DH1U5VDC TV 8 3 4 1 2 C...

Page 11: ...22pF R606 1K R606 1K R608 1K R608 1K R601 1meg R601 1meg R617 10 R617 10 C613 1uF C613 1uF R603 220 R603 220 R614 18K R614 18K C609 100nF C609 100nF C608 100nF C608 100nF C605 1nF C605 1nF R625 150K R...

Page 12: ...A SPEAKER B BP901C BIN BP901C BINDING POST 6 5 BP901B BI BP901B BINDING POST 3 4 P901B 6PIN3 96 C P901B 6PIN3 96 C 1 2 3 4 5 6 BP901A BINDING POST 2 1 BP901D BIN BP901D BINDING POST 7 8 12 SCHEMATICS...

Page 13: ...13 PCB LAYOUT...

Page 14: ..._ 14 PCB LAYOUT...

Page 15: ..._ _ _ 15 PCB LAYOUT...

Page 16: ...16 PCB LAYOUT 01 37506 00...

Page 17: ..._ _ _ _ _ _ _ _ 17 PCB LAYOUT...

Page 18: ..._ _ _ _ _ _ 18 PCB LAYOUT...

Page 19: ...8 00 DAX 300X 080 031 D128 Switch Diode 1N4148 33 44148 00 DAX 300X 080 031 D129 Switch Diode 1N4148 33 44148 00 DAX 300X 080 031 D130 Switch Diode 1N4148 33 44148 00 DAX 300X 080 031 TRANSISTOR Q101...

Page 20: ...1 6W 1 07 24750 50 AX 200X 080 031 R102 Metal Film Resistor 10K 1 6W 1 07 21002 50 AX 200X 080 031 R103 Metal Film Resistor 549 1 6W 1 07 25490 50 AX 200X 080 031 R104 Metal Film Resistor 1K 1 6W 5 0...

Page 21: ...etal Film Resistor 4 7 1 6W 5 07 20479 50 AX 200X 080 031 R156 Metal Film Resistor 33 1 6W 5 07 20330 50 AX 200X 080 031 R157 Metal Film Resistor 3K3 1 6W 5 07 20332 50 AX 200X 080 031 R158 Metal Film...

Page 22: ...W 5 07 20105 50 AX 200X 080 031 R1E3 Cement Resistor 0 05 3W 5 07 40507 03 RAD RES 520X 200 LS 400 039 R1E4 Metal Film Resistor 100 1 6W 5 07 20101 50 AX 200X 080 031 R1E5 Metal Film Resistor 100 1 6W...

Page 23: ...5 10461 07 RAD CAP 300X 150 LS 200 031 C129 ALU Electrolytic Capacitor 47uF 25V 20 105 06 47021 01 CPCYL1 D 300 LS 200 031 C130 ALU Electrolytic Capacitor 47uF 25V 20 105 06 47021 01 CPCYL1 D 300 LS 2...

Page 24: ...itch Diode 1N4148 33 44148 00 DAX 300X 080 031 D214 Switch Diode 1N4148 33 44148 00 DAX 300X 080 031 D215 Switch Diode 1N4148 33 44148 00 DAX 300X 080 031 D216 Switch Diode 1N4148 33 44148 00 DAX 300X...

Page 25: ...Resistor 1K 1 6W 1 07 21001 50 AX 200X 080 031 R228 Metal Film Resistor 1K 1 6W 1 07 21001 50 AX 200X 080 031 R229 Metal Film Resistor 2K2 1 6W 5 07 20222 50 AX 200X 080 031 R230 Metal Film Resistor 1...

Page 26: ...S 200 031 C216 ALU Electrolytic Capacitor 10uF 50V 20 105 06 10051 01 CPCYL1 D 200 LS 200 031 C217 ALU Electrolytic Capacitor 10uF 50V 20 105 06 10051 01 CPCYL1 D 200 LS 200 031 C218 ALU Electrolytic...

Page 27: ...r 100pF 5 1KV 05 10113 04 CPAX 200X 100 031 C259 Ceramic Capacitor 100pF 5 1KV 05 10113 04 CPAX 200X 100 031 C260 Polyester capacitor 100nF 5 63V 25 10461 07 RAD CAP 300X 150 LS 200 031 C261 ALU Elect...

Page 28: ...IP4 RESISTOR R401 Metal Oxide Film Resistor 68K 1W 5 07 30683 21 AX 600X 125 039 R402 Metal Film Resistor 100 1 6W 5 07 20101 50 AX 200X 080 031 R403 Metal Film Resistor 510 1 6W 5 07 20511 50 AX 200X...

Page 29: ...031 TRANSISTOR Q901 Digital Transistor DTA114ESA 31 00114 03 TO 92 Q902 Digital Transistor DTA114ESA 31 00114 03 TO 92 Q903 Digital Transistor DTA114ESA 31 00114 03 TO 92 Q904 Transistor 2SC1815 GR 31...

Page 30: ...909 Link L 10mm 21 06101 00 AX 400X 100 031 J910 Link L 12 5mm 21 06121 01 AX 500X 100 031 J911 Link L 10mm 21 06101 00 AX 400X 100 031 J912 Link L 10mm 21 06101 00 AX 400X 100 031 J913 Link L 10mm 21...

Page 31: ...5 07 90154 00 SM R_0603 R626 Chip Resistor 150K 1 10W 5 07 90154 00 SM R_0603 R627 Chip Resistor 100K 1 10W 5 07 90104 00 SM R_0603 R628 Chip Resistor 100K 1 10W 5 07 90104 00 SM R_0603 CAPACTIOR C601...

Page 32: ...INLET to J401 WIRE UL1672 16AWG blue L 460mm A14 37501 01 Fuse holder to J402 WIRE UL1672 16AWG red L 380mm A14 37501 02 P206B P101B L CH WIRE UL2468 24AWG 5C 6C T wo terminal XHB2 54 11pin L 150mm 14...

Page 33: ...1 S014 S013 C005 C011 S007 C009 C004 S015 S009 S002 S002 C012 S003 S010 C010 C001 C003 S016 S002 C007 C008 S005 C002 S012 S004 S002 F002 S001 F004 S002 F010 F007 F008 F001 F005 F009 F003 F006 F011 S00...

Page 34: ...ot 4 T001 67 124003 2 Top Cover Graphite 1 C008 J78 001002 0 Foot Pad 4 67 124013 2 Top Cover Titanium Ti 1 C009 73 003001 0 Rotate Knob 1 T001 from S N greater than H02C275BEEG02144 C010 69 005001 0...

Page 35: ..._ _ _ _ _ _ 35 PACKING DIAGRAM...

Page 36: ...rom 10K to 22K 2 R187 changed from 510 Ohms to 2 2K Dec 10 08 Correction for Power Off pop noise C245 C253 changed from 100nF to 10uF 50V Electrolytic Capacitor Change Top Cover Chassis for better fit...

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