NAD C730 User Manual Download

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NAD

SER

VICE MANUAL

C 730

STEREO

RECEIVER

C 730

STEREO

RECEIVER

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Summary of Contents for C730

Page 1: ...NAD SERVICE MANUAL C 730 STEREO RECEIVER C 730STEREO RECEIVER ...

Page 2: ... leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit Parts marked with the symbol are critical with regard to the risk of fire and electric shock Replace only with parts recommended by the manufacturer CONTENTS DESCRIPTION PAGE SPECIFICATIONS 3 4 REAR PANEL FRONT PANEL 5 DISASSEMBLY INSTRUCTIONS 6 BLOCK DIAGRAM 7 WIRING DIAGRA...

Page 3: ...THD 2V CD input 4V output 1KHz 0 08 2 Frequency Response 500mV CD in 20Hz 20KHz 0 0 08dB 3 S N Ratio A wtd 500mV CD in 1KHz 85dB 4 Tone Control Response Bass 500mV in 1W out 100Hz boost cut 9 2dB Treble 500mV in 1W out 10KHz boost cut 9 2dB AM TUNER SECTION Frequency Range AH 530 1710 KHz Step 10 KHz C 531 1602 KHz Step 9 KHz Input level is expressed as the reading in open circuit of 75 ohm source...

Page 4: ...dB 3dB 7 AM Suppression 60dBµ 100 mod FM 30 mod AM 48dB 48dB 8 Pilot Suppression 60dBµ 60dB 60dB 9 Frequency Response 60dBµ 20Hz 15KHz in 75µS for AH 50µS for C and 0 1 5dB 0 1 5dB Japan 10 Channel Separation 60dBµ IHF wtd 100Hz 30dB 30dB 1KHz 38dB 38dB 10KHz 30dB 30dB 11 Alternate Channel Selectivity 400KHz IHF 60dB 45dB 12 Muting Level 18 3dBµ 18 3dBµ 13 Output 750mV 150mV 500mV 100mV 14 Blend o...

Page 5: ...ET TUNE AND 10 DISPLAY AREA 11 VOLUME 12 HEADPHONE SOCKET 13 INPUT SELECTORS 14 BASS TREBLE 15 TONE DEFEAT 16 BALANCE 1 FM ANTENNA 2 AM ANTENNA 3 DISC INPUT 4 CD INPUT 5 VIDEO INPUT 6 AUX INPUT 7 TAPE 2 IN OUT 8 TAPE 1 IN OUT 9 PRE OUT 10 NAD LINK IN OUT 11 SOFT CLIPPING 12 12V TRIGGER OUT 13 SPEAKERS 14 AC LINE CORD 15 SWITCHED AC OUTLET AH version only ...

Page 6: ...side panels Remove tapping screw 3 0 x 8 5 5 from the back panel Refer to Figure No 1 Figure No 1 2 Pull both sides of the TOP COVER slightly outwards 6 and tilt approx 35 and then remove in the direction as indicated by the arrow 7 Refer to Figure No 2 Figure No 2 5 4 3 1 2 7 6 6 ...

Page 7: ...PLL LC72723M AM FM IF LA1837 TUNER DIODE MATRIX NAD LINK IN OUT MAIN POWER SUPPLY SPEAKER OUT STAND BY POWER SUPPLY RELAY RELAY POWER AMP 5V CPU AC INPUT AC INPUT VT VT ce data clk RDS CLK RDS SIG RDS DATA data out 1 Power On 2 Protect Flash 2Hz 1 2 Standby 1 2 LC7218 Locking SW Tone defeat ST MO MUTE SMETER TUNE FM OSC IF AM OSC IF OUT AUDIO AUDIO IN IN S2 S3 S4 S5 S6 S7 S8 S9 S10 VOLUME MOTORIZE...

Page 8: ... SPEAKER BOARD BLACK 6PIN BLACK 6PIN BLACK 35PIN BLACK BROWN BLUE 3PIN BLACK 3PIN BLACK RED AC INPUT BLUE 3PIN BLACK 4PIN BLACK BLACK BLACK BLUE GREEN TUNER BOARD POWER SWITCH BOARD PHONE BOARD LED BOARD PRIMARY BOARD P32 P39 P40 P41 P42 P43 P44 P45 P46 P47 P48 P33 P34 P35 P36 ...

Page 9: ...OSC RF Testing Point TP2 Testing Point TP1 Testing Point TP3 Testing Point TP4 9 ADJUSTMENT POINTS DIAGRAM 1 TUNER 2 MAIN BOARD ...

Page 10: ...OP ANTENNA 60cm DIGITAL MILLIVOLT METER VT J911 GND FM SIGNAL GENERATOR AM SIGNAL GENERATOR FM SIGNAL GENERATOR RDS GENERATOR FM STEREO GENERATOR P901 DC MILLIVOLT METER UNIT UNIT UNIT UNIT INSTRUMENT SETUP 1 FM MEASUREMENT Fig 1 Fig 2 2 RDS MEASUREMENT Fig 3 3 AM MEASUREMENT Fig 4 10 ALIGNMENT PROCEDURES AMPLIFIER SECTION Step Item Connection Adjustment Adjust for 1 Left Channel Voltmeter to TP1 ...

Page 11: ...point Adjust for Remarks FM MUTE MODE switch ON AUTO Repeat the steps 1 to 3 until no fur ther adjustment is necessary FM MUTE MODE switch ON AUTO Don t turn more than 180 Repeat stereo distortion and stereo separation alignment until THD at minimum and separation at maximum Adjust such that output just unmute Decode the RDS program station AM SECTION AM Modulation 400Hz 30 For AH Version Step 1 2...

Page 12: ...PCB LAYOUT KEY BOARD TOP VIEW BOTTOM VIEW PHONE BOARD LED BOARD SECONDARY BOARD PRIMARY BOARD 12 ...

Page 13: ...13 MAIN BOARD ...

Page 14: ...14 TUNER BOARD PSU BOARD POWER SWITCH BOARD SPEAKER BOARD ...

Page 15: ...16 15 MAIN BOARD SCHEMATIC DIAGRAM NOTE 1 RESISTORS ARE CARBON FILM 5 1 8W UNLESS OTHERWISE SPECIFIED 2 CERAMIC CAPACITORS ARE 50V 10 UNLESS OTHERWISE SPECIFIED ...

Page 16: ...17 18 TUNER BOARD NOTE 1 RESISTORS ARE CARBON FILM 5 1 8W UNLESS OTHERWISE SPECIFIED 2 CERAMIC CAPACITORS ARE 50V 10 UNLESS OTHERWISE SPECIFIED ...

Page 17: ...V M216 BLEND M210 FM MUTE M207 FM AM M201 TUNE M213 MEMORY M202 DISC M206 TUNE DN M203 DISPLAY M219A 6MHz CST6 00MGW R257 22K R232 10K D209 1N4148 D202 1N4004 R231 22K D204 1N4148 D205 1N4148 D206 1N4148 D207 1N4148 R252 10K R253 10K R254 10K R255 10K R256 10K R281 10K R282 10K R283 10K R284 10K R285 22K R286 22K C205 0 1u R230 22K R219 1K R218 1K J201A TO LED BD R201 8 2 0 R204 8 20 R207 1K8 R210...

Page 18: ...7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 P17 PWM0 P30 P31 P32 P33 P70 INT0 RES XT1 P74 XT2 P75 VSS1 CF1 CF2 VDD1 P80 AN0 P81 AN1 P82 AN2 P83 AN3 P84 AN4 P85 AN5 P86 AN6 P87 AN7 P71 INT1 P72 INT2 T0IN P73 INT3 T0IN 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 Interrupt Control IR EPROM 48KB EPROM Control A15 A0 D7 D0 TA CE OE DASEC PC ACC B Register C Register P...

Page 19: ... MUX DOUT ACK LOGIC DEVICE ADDRESS COMPARATOR START STOP LOGIC SDA A2 A1 A0 DIN DOUT 2 S1 1 VSS 26 VDD 27 S1 3 S2 26 S2 4 S3 25 S3 5 S4 24 S4 6 S5 23 S5 7 S6 22 S6 8 S7 21 S7 9 S8 20 S8 10 S9 19 S9 11 S10 18 S10 12 S11 13 GND 14 CK 15 DATA 16 STB 17 S11 L ch 10bit Latch Circuit LEVEL SHIFT SHIFT RESISTER CIRCUIT R ch 10bit Latch Circuit Same as L ch Circuit U401 TC9273N ...

Page 20: ... CF FM S METER OUTPUT AM S METER OUTPUT MUTE FM AM SWITCH PILOT V CO SD COMP DET BUFF DECODER ANTI BIRIDE 3 rd 5 th STEREO SW MUTE VCO 304kHz FF 38k P DET FM SD ADJ OSC REG AM RF INPUT AFC AM AGC AM DETECTOR INPUT FM DETECTOR OUTPUT MPX IUTPUT MPX OUTPUT MPX OUTPUT STEREO L INPUT STEREO R INPUT L OUT R OUT FF 19k FF 19k PILOT DET U603 NJM78M 1 INPUT 3 OUTPUT 2 GND AMPLIFIER 1 OUTPUT INVERTING INPU...

Page 21: ... 16 HCTR 18 AMIN 15 LCTR 2 CE 3 DI 4 CL 3 VDD 4 VSS 5 DO 9 OUT0 10 OUT1 11 OUT2 12 OUT3 13 OUT4 14 OUT5 17 OUT6 7 IN0 8 IN1 Vdda 3 REFERENCE VOLTAGE ANTIALIASING FILTER DATA DECODER VREF 1 VREF FLOUT 5 CIN 6 PLL 57kHz CLOCK RECOVERY 1187 5Hz _ Vddd 11 Vssd 10 RDDA 14 RDCL 15 MODE 12 RST 13 RDS ID READY 16 Vssa 4 MPXIN 2 TEST 7 TEST 57kHz BPF SCF SMOOTHING FILTER OSC CLK 4 332MHz 9 XIN 8 XOUT RDS I...

Page 22: ...PF 5 AT 3 5x 2 C761 C762 150F 101J 5 IF CC 50V 100pF 5 RL 5x3 5 C763 C764 157C 476M 5 IMK CE 10V 47µF 20 RL 5x7 C765 C770 150F 101J 5 IF CC 50V 100pF 5 RL 5x3 5 C771 C772 157D 106M 5 IUK CE 16V 10µF 20 RL 5x11 C773 C774 153F 103J 5 IM CM 50V 0 01µF 5 RL 5x7 C775 C776 150F 101J 5 IF CC 50V 100pF 5 RL 5x3 5 C777 C778 153F 183J 5 KP CM 50V 0 018µF 5 RL C779 C780 150F 101J 5 IF CC 50V 100pF 5 RL 5x3 5...

Page 23: ... 4804 1480 C DIODE 1N4148 ATS D910 4804 0040 2 DIODE 1N4004 AT J709 J729 4837 3A31 2 DZ 1 2W 3 16 3 38V ROHM COILS L801 L802 1804 0540 0 SPRING COIL 1MH L804 1803 0014 0 COIL 1µH 10 BL 7 JACKS M503 2113 1179 0 PHONE JACK D3 5 BK J504 2113 1121 0 2P RCA JACK Y Y AU R883 R884 M701 2113 1818 0 6P RCA JACK W R GOLD RELAY M801 4500 0910 0 RELAY 24VDC 125VA 3A TRANSISTORS M501 M502 4860 5270 5 TR TYN412...

Page 24: ... 222J C RCF 1 8W 2 2K 5 ATS R427 R428 4701 105J C RCF 1 8W 1M 5 ATS R429 R430 4701 331J C RCF 1 8W 330R 5 ATS R431 R432 4701 473J C RCF 1 8W 47K 5 ATS R440 4701 473J C RCF 1 8W 47K 5 ATS R441 R501 4701 102J C RCF 1 8W 1K 5 ATS R502 4701 223J C RCF 1 8W 22K 5 ATS R503 4701 101J C RCF 1 8W 100R 5 ATS R504 R505 4701 102J C RCF 1 8W 1K 5 ATS R506 4701 103J C RCF 1 8W 10K 5 ATS R507 4701 101J C RCF 1 8...

Page 25: ...49 R850 4717 560J 2 RMF 1 2W 56R 5 AT R851 R852 4717 680J 2 F RMF 1 2W 68R 5 AT R853 R854 474B R22K 5 02 RWR 5W 0 22R X2 10 RL R855 R856 4707 223J 2 RCF 1 2W 22K 5 AT R857 R858 4718 8R2J 2 X RMF 1W 8 2R 5 AT R859 R860 4717 2R2J 2 RMF 1 2W 2 2R 5 AT R863 R864 4701 273J C RCF 1 8W 27K 5 ATS R869 4701 103J C RCF 1 8W 10K 5 ATS R870 4701 223J C RCF 1 8W 22K 5 ATS R871 R872 4701 333J C RCF 1 8W 33K 5 A...

Page 26: ...00 PCB N0940C SEC SECONDARY ASSEMBLY CAPACITORS C101 C102 150F 104K 5 II CC 50V 0 1µF 10 RL 5x5 C103 C107 153I 104J 5 NMN CM 63V 0 1µF RL 7 5X7 RESISTORS R101 R102 4718 R22J 2 RMF 1W 0 22R 5 AT SW ASSEMBLY PC BOARD 05000 PCB N0940C SW PCB ASSY MAIN SW N094XC CAPACITOR C854 8910 0091 0 CC 400V 0 01µF 20 RL SWITCH M107 5200 3665 0 POWER SWITCH TV5 KEYBOARD ASSEMBLY PC BOARD 06000 AH PCB N0940C KEY K...

Page 27: ...K 5 ATS R220 R221 4701 471J C RCF 1 8W 470R 5 ATS R222 4701 473J C RCF 1 8W 47K 5 ATS R230 R231 4701 223J C RCF 1 8W 22K 5 ATS R232 R240 4701 103J C RCF 1 8W 10K 5 ATS R241 R246 4701 104J C RCF 1 8W 100K 5 ATS R247 R248 4701 103J C RCF 1 8W 10K 5 ATS R252 R256 4701 103J C RCF 1 8W 10K 5 ATS R257 R259 4701 223J C RCF 1 8W 22K 5 ATS R260 4701 471J C RCF 1 8W 470R 5 ATS R263 R274 4701 104J C RCF 1 8W...

Page 28: ...LY 10000 C PCB N0941C TUN TUNER ASSEMBLY CAPACITORS C901 C 150F 223K 2 FD CC 50V 0 022µF 10 AT C902 C903 150F 223K 2 FD CC 50V 0 022µF 10 AT C904 157D 106M 5 GM CE 16V 10µF 20 RL 4x7 C906 157D 107M 5 KUK CE 16V 100µF 20 RL C911 150F 200J 2 FC CC 50V 20pF 5 AT 3 5x2 C912 C913 150F 102K 2 FC CC 50V 1000pF 10 AT 3 5 C914 C915 150F 101K 2 FC CC 50V 100pF 10 AT 3 5x C916 150F 331K 2 FC CC 50V 330pF 10 ...

Page 29: ...C 50V 0 022µF 10 AT C979 157D 226M 5 GM CE 16V 22µF 20 RL 4x7 C980 153F 473J 5 NLM CM 50V 0 047µF 5 RL 7 5 C981 150F 223K 2 FD CC 50V 0 022µF 10 AT C982 150F 101K 2 FC CC 50V 100pF 10 AT 3 5x C985 150F 561K 2 FC CC 50V 560pF 10 AT 3 5x C986 157B 107M 5 KM CE 6 3V 100µF 20 RL 6x7 C987 150F 223K 2 FD CC 50V 0 022µF 10 AT C988 C989 15CH 300J 5 IG CTC 0 60 30pF 5 RL 5x4 C990 157B 107M 5 KM CE 6 3V 100...

Page 30: ... ATS R918 4701 472J C RCF 1 8W 4 7K 5 ATS R919 4701 102J C RCF 1 8W 1K 5 ATS R920 R924 4701 102J C RCF 1 8W 1K 5 ATS R925 R926 4701 820J C RCF 1 8W 82R 5 ATS R927 4701 103J C RCF 1 8W 10K 5 ATS R928 4701 221J C RCF 1 8W 220R 5 ATS R929 4701 332J C RCF 1 8W 3 3K 5 ATS R931 4701 220J C RCF 1 8W 22R 5 ATS R942 4701 472J C RCF 1 8W 4 7K 5 ATS R943 4701 822J C RCF 1 8W 8 2K 5 ATS R945 4701 392J C RCF 1...

Page 31: ...ABLE RESISTORS R941 4756 2036 3 15 SVR B20K H3 NVZ6TL1 6 3x6 8 HDK R956 4756 1036 3 06 SVR 10K H3 7x7 6 RH0615C R991 4756 1046 3 17 SVR B100K H3 NVZ6TL1 6 3x6 8 HDK ICs U901 3130 8180 0 IC LA1837 AM FM IF U902 3131 9040 0 IC LC72723M RDS U903 3131 3760 0 IC LC7218 PLL FREQ Reference No Part No Description NOTE The components identified by mark are critical for risk of fire and electrical shock Rep...

Page 32: ...5 0140 0140 0142 0130 0130 0130 0134 0128 0124 0120 J206C 0158 0301 0200 0125 0126 0122 0122 0123 0122 0117 0121 0116 0111 0110 0109 0113 0112 0107 0105 0104 0103 0108 0142 T901 0119 0115 0114 0118 0130 0130 0130 0136 0136 0135 0135 0129 0132 0149 0127 0135 0131 0101 0102 0106 ...

Page 33: ...122 2445 0201 0 TONE KNOB SHORT C730 3 0123 2445 0301 0 TONE DEFEAT BUTTON 1 0124 2445 0401 0 VOLUME KNOB SHORT C730 1 0125 5400 9171 0 FRONT HEATSINK C730 1 0126 5400 9181 0 REAR HEATSINK C730 1 0127 2600 4008 0973 FLAT WASHER M4X0 8X9 7 BZ 4 0128 2607 4010 0703 SPRING WASHER M4X1X7 BZ 4 0129 2904 4010 3000 SCREW M4X10 BLK 4 0130 2954 3008 3000 T3X8MM SELF TAPPING 42 0131 2842 3367 0 METAL WASHER...

Page 34: ...T 26X20MM 4 J206C 7010 1660 0 FLEXIBLE CABLE 35P L220 P1 25 1 T901 1806 3546 0 X FORMER I P 120 230V N094XC 1 36 NOTE The components identified by mark are critical for risk of fire and electrical shock Replace only with part number specified AH USA Canadian model only C European model only ITEM Part No Description Qty ...

Page 35: ...1 41 8901 2950 0 REMOTE CONTROL HANDSET 1 42 2103 6101 0 AH RF CONNECTOR PLUG 1 42 2103 6201 0 C RF CONNECTOR PLUG 1 43 4301 4869 1 INSTRUCTION MANUAL C730 1 44 1497 1062 0 MANUAL POLYBAG 1 45 1480 1900 1 CARTON BOX 1 46 2113 1155 0 AM LOOP ANTENNA 1 Proprietary information for servicing purposes only The information herein may not be used com mercially without the prior written agreement of NAD E...

Page 36: ...SERVICE MANUAL NAD 2001 C 730 STEREO RECEIVER NAD ELECTRONICS INTERNATIONAL TORONTO CANADA ...

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