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NAD CI940, Service Manual, Page: 2 / 36

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TABLE OF CONTENTS 

 

DESCRIPTION       

 

 

       P A G E 

 

SERVICE CAUTION…………………………………………………………..3-4

SPECIFICATIONS…………………………………………………………...5

WIRING DIAGRAM……………………………………………………………...6

  

 PCB LAYOUT………………………………………………………………..17-20

EXPLODED VIEW PARTS LIST……………………………………………....37

 

CIRCUIT DIAGRAMS.....

TROUBLE SHOOTING GUIDE…………………..........................................10

EXPLODED VIEW ......................................................................................36

..………………................................................11-16

ELECTRICAL VIEW PARTS LIST…………………………………...…....21-35

BLOCK DIAGRAM…………………………………………………………....7-9

 

Summary of Contents for CI940

Page 1: ...NAD SERVICE MANUAL CI 940 MULTI CHANNEL AMPLIFIER CI 940 MULTI CHANNEL AMPLIFIER...

Page 2: ...ON P A G E SERVICE CAUTION 3 4 SPECIFICATIONS 5 WIRING DIAGRAM 6 PCB LAYOUT 17 20 EXPLODED VIEW PARTS LIST 37 CIRCUIT DIAGRAMS TROUBLE SHOOTING GUIDE 10 EXPLODED VIEW 36 11 16 ELECTRICAL VIEW PARTS LI...

Page 3: ...ACITOR BETWEEN A KNOWN GOOD EARTH GROUND WATER PIPE CONDUIT ETC AND THE EXPOSED METALLIC PARTS ONE AT A TIME MEASURE THE AC VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND 15 MFD CAPACITOR REV...

Page 4: ...s including Metal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components co...

Page 5: ...and 1kHz Input Sensitivity 270mV ref rated power Voltage Gain 35dB Frequency Response 0 2dB ref 20Hz 20kHz 3dB at 3Hz and 100kHz Signal Noise Ratio A Weighted 95dBA ref 1W 110dB ref 35W Trigger 5 30V...

Page 6: ...6...

Page 7: ...t R Cascade Cascade Zone 1 IN Zone 1 OUT Zone 2 OUT Zone 2 IN FOUR CHANNELS SEPERATED POWER AMPLIFIERS Audio sense circuit Protection circuit Zone 1 L Zone 1 LR Zone 2 R Zone 2 L Fan Contril Circuit H...

Page 8: ...OUTPUT DC LEVEL NORMAL CHECK POWERAMP CIRCUIT IS THERE SIGNAL OUTPUT YES YES NO CHECK INPUT BOARD CIRCUIT IS INPUT BOARD OUT NORMAL NO YES NORMAL CHECK THE MUTE CONTROL IS THE MUTE SIGNAL OFF YES CHE...

Page 9: ...308 100 R816 10K C435 N I Q602 2N5401 R316 1meg R339 1K R358 N I R334 51 Q409 2SD669A Q413 2N5551 Q416 2SD669A D505 N I R320 4 3K R411 390 C408 10pF R442 56K Q307 2SA1360 R430 27 C419 100nF Q315 N I 5...

Page 10: ...2 RV201 200 C217 10uF R217 100 Q201 2SC2240 R157 N I Q203 2SA970 C207 47pF C234 N I 3 4 RL501A JQX 115F024 2HS4AF Q202 2SA970 C214 47nF R508 N I R121 1meg R802 10K R235 1K R221 1meg R238 1K R120 4 3K...

Page 11: ...A D 5 P0 5 32 A D 4 P0 4 33 AD3 P0 3 34 AD2 P0 2 35 AD1 P0 1 36 AD0 AD0 37 VCC 38 P4 2 CCP0 MISO 39 P1 0 CLKOUT2 40 P1 1 41 P1 2 ECI 42 P1 3 CCP0 43 P1 4 CCP1 SS 44 IC901 STC12C5A 16S2 35C LQ FP44 B E...

Page 12: ...SR QA05 C1815 5VD RA21 2K2 CA14 1uF DGND 6 7 8 RL101B HFD4 5 SR 3 4 5 RL101A HFD4 5 SR A GND AGND AGND AGND AGND A GND SIG2 CA02 0 1uF RA02 220K SIG3 CA03 0 1uF RA03 220K SIG4 CA04 0 1uF RA04 220K AGN...

Page 13: ...0 VCC1 GNDP T902 BAW56W Q911 BC807 25 R930 10R R945 1K T903 BAW56W Q914 AOT412 Q907 BC807 25 R931 10R R939 1K T904 BAW56W Q916 AOT412 Q909 BC807 25 R933 10R R941 1K T906 BAW56W Q915 AOT412 Q908 BC807...

Page 14: ...BC856BW C954 100N R952 100K R961 100K R962 100K R969 100K C950 100N R970 47K R963 10K D953 BAT54J R954 10R C953 100N GND R950 100R VCC VCC GND R951 909K C951 220nF 25V U951 TL431 D950 12V Q953 BC846B...

Page 15: ...1 MAIN BOARD 17 PCB LAYOUT Top Layout Bottom Layout...

Page 16: ...2 DISPLAY BOARD AND POWERKEY BOARD 18 Top Layout Bottom Layout 3 INPUT BOARD Top Layout Bottom Layout...

Page 17: ...4 PSU DCDC BOARD 19 Top Layout Bottom Layout...

Page 18: ...5 PSU DUAL VOLTAGE BOARD 20 Top Layout Bottom Layout...

Page 19: ...s i s e R m l i F l a t e M 0 5 0 0 1 0 2 7 0 1 1 6 R 1 1 5 R 1 6W 5 R118 R218 R318 R418 07 21800 50 Metal Film Resistor 180 1 6W 1 R130 R230 R330 R430 07 22709 50 Metal Film Resistor 27 1 6W 1 R119...

Page 20: ...13 01 Ceramic Capacitor 10pF 5 1KV C112 C212 C312 C412 05 47013 01 Ceramic Capacitor 47pF 5 1KV C105 C205 C305 C405 05 10113 04 Ceramic Capacitor 100pF 5 1KV C122 C123 C222 C223 C322 C323 C422 C423 05...

Page 21: ...0 DUAL OP AMP TL082 DIP8 IC801 02 01237 11 1237 MODULE PCB HS1237 SWITCH S501 S601 11 05202 06 Slide SWITCH SK 22F03 G6 S801 11 05202 17 Slide SWITCH SK 22F03 G3 INDUCTOR L102 L202 L302 L402 08 01079...

Page 22: ...d SFAT482 Q116 Q216 Q316 Q416 31 00669 01 Transistor 2SD669A C TO126 Q111 Q211 Q311 Q411 31 02121 00 Transistor 2SA2121 O Q112 Q212 Q312 Q412 31 05949 00 Transistor 2SC5949 O CB801 CB802 A07 70022 09...

Page 23: ...01 MCU STC12C5A16S2 35I LQFP44 FERRITE BEAD L901 08 04331 06 Ferrite Bead SMD 742792037 330ohm 100MHz 25 2A CAPACTIOR C905 C906 C907 06 10051 02 Alu Electrolytic Capacitor CD263 X 10uF 50V 20 105 C901...

Page 24: ...X7R CA01 CA02 CA03 CA04 CA06 CA08 C A12 26 10451 10 Ceramic Chip Capacitor 100nK 50V 0603 X7R CA13 CA14 26 10511 20 Ceramic Chip Capacitor 1uK 16V 0603 X7R C1608X7R1C1 05K C2001 C2004 26 10351 01 Ele...

Page 25: ...130 115 197mm DIODE D907 D908 D909 D910 D911 D917 33 20316 01 High speed Diode BAS316 D907 D908 D909 D910 D911 D917 or N33 44448 01 High speed Diode IN4448HWS 7 F D901 D902 D903 D904 D905 D906 D913 33...

Page 26: ...L R938 R939 R940 R941 R942 R943 R944 R945 07 91001 00 Chip Resistor 1K 0603 1 10W 1 RC0603FR 071KL R974 07 91201 00 Chip Resistor 1 2K 0603 1 10W 1 RC0603FR 071K2L R908 07 91801 00 Chip Resistor 1 8K...

Page 27: ...5 02 Chip Resistor 1M 1206 1 4W 5 RC1206JR 071ML R810 R811 R901 R902 07 93903 02 Chip Resistor 390K 1206 1 4W 1 RC1206FR 07390KL R983 R984 07 90205 02 Chip Resistor 2M 1206 1 4W 5 RC1206JR 072ML R976...

Page 28: ...00 Alu Electrolytic Capacitor 560uF 50V 20 105 RXW561M1HBK 1325 C936 C940 06 10231 03 Alu Electrolytic Capacitor CD287 1000uF 35V 20 12 5 25 F5 0 C937 C938 C941 C955 C972 06 33121 04 Alu Electrolytic...

Page 29: ...TW 4 white Use for S901 S902 63 020308 1 Spring Washer 3 plated black zinc U907 85 157001 0 Transistor Washer TW 4 white U907 78 090004 0 Insulated Cushion 19 14mm 1 5mm PCB 6 PSU Dual Voltage Module...

Page 30: ...421 00 Ceramic Chip Capacitor 220nK 25V 0603 X7R C1608X7R1 E224KT C957 26 47511 01 Chip Capacitor 4 7uK 16V X5R 0805 C2012X5R1 C475K C956 26 22611 02 Chip Capacitor 22uM 10V 1206 X5R C3216X5R1 A226MT...

Page 31: ...U600 or A17 07002 00 AC INLET 3516 T1C02 CABLE Connect Main Board P804B And Audio Input Board PA01B 14 94011 01 WIRE UL1007 22AWG L 120mm Connect Main Board J2005 And Audio Input Board J2010 14 94004...

Page 32: ...LED lens PMMA 86 046001 0 LED Lens Gum 3m Dobble side adhensive 78 460001 0 Insulated Cushion GK17 T 0 5mm EVA 79 420002 0 EVA1 34 10 3mm 79 420003 1 EVA2 65 18 2mm 79 460001 0 Indicator light EVA 79...

Page 33: ...20 1 HEAT SHRINKING TUBE 22 25mm CB HFT Power input socket A78 000300 1 Heat Shrinking Tube 30 25mm CB HFT 84 001003 0 CABLE TIE YJ 100 85 460001 0 Nylon Spacer 3 16 8 PACKING 88 460001 0A Master cart...

Page 34: ...ASSY EXPLODE VIEW 36 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 17 19 20 21 23 24 25 26 27 1 22 28...

Page 35: ...20012 1 handle 2 12 01 94004 00 power key PCB 1 13 77 124004 0 power button bezel 1 14 74 123003 1 input button 1 15 70 460004 0B front panel 1 16 76 008001 0 led lens 2 17 79 460001 0 light EVA 1 18...

Page 36: ...SERVICE MANUAL CI 940 MULTI CHANNEL AMPLIFIER NAD ELECTRONICS LTD TORONTO...

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