NAD-C427-tun-sm 电路图 维修手册.pdf
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1、NAD Digital Media Tuner Digital Media Tuner SERVICE MANUAL C427 C427 RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS DESCRIPTION P A G E SPECIFICATIONS.4 WIRING DIAGRAM .5 BLOCK DIAGRAM.7 PCB LAYOUT.11-15 EXPLODED VIEW PARTS LIST EXPLODED VIEW ELECTRICAL VIEW PARTS LIST.16-23 WIRING DIAGRAM PARTS LIST.6 .
2、24-24 . .24-24 CIRCUIT DIAGRAMS.8-10 RadioFans.CN 收音机爱 好者资料库 SPECIFICATION FM SECTION Usable Sensitivity (98 MHz) 10 dBu Signal/Noise Ratio 65 dB (60 dB_ IHF-WTD Mono) 60 dB (60 dB_ IHF-WTD Stereo) Frequency Response 1.5 dB (20 Hz - 15 kHz, 60 dB_) Channel Separation (60 dBu) 30 Hz 33 dB 1 kHz 40 dB
3、 10 kHz 32 dB Capture Ratio (40 dBu) 3 dB AM Suppression 50 dB (60 dBu, 100% Mod. FM, 30% Mod. AM) Image Rejection (119.4 MHz) 70 dB I.F. Rejection (10.7 MHz) 70 dB Pilot Suppression (60 dBu) 60 dB Total Harmonic Distortion* - Mono 0.4% Stereo 0.8% Auto Search Sensitivity 24 dBu RDS Decode Sensitivi
4、ty 26 dBu AM SECTION Usable Sensitivity (999/1000 Hz) 55 dB_ Signal/Noise Ratio (5 mV in) 42 dB Total Harmonic Distortion (5 mV in) 1.5% IF Rejection (450 kHz) 40 dB Image Rejection (F+2xIF) 28 dB Selectivity 20 dB Loop Sensitivity (20dB S/N) - 999/1000 Hz 66 dB 603/600 Hz 66 dB 1404/1400 Hz 66 dB F
5、requency response (100 - 2.3 kHz, 5 mV) 6 dB 4 RadioFans.CN 收音机爱 好者资料库 C427 WIRING DIAGRAM FM/AM Tuner 1 Main Board 2 FPP Board Encorder Board 4 PSU Board 3 R140 R674 C665 R671 U6001 M201 K207 C658 U614 C1001 R623 C646 R1348 R1352 C1002 J601 R1002 C616 C617 C688 R681 D607 C1443 D606 C609 R607 C608 Q
6、1010 R1347 C1444R662 R622 R698 C649 R606 Q1007 D1054 K603 D602 C652R652 R654 Q602 R1355 Q1008 Q1011 R1345 C694 R675 C666 C689 Y601 R682 C667 R673 C660 R649 C692 R690 C697 R648 R691 R696 R697 C693 R695 C645 R692 Q601 C698 C644 C696 D601 K601 C669 C647R683 R685 R678 U617 R659 C681 J608 R672 J606 C683
7、C685 R679 R676 D603 C684 C686 Q6001 R677 C674 C682Q604 R684 R680 C687 U610 J602 R657 C650 C690 C691 C1011 D604 D605 U613 R693 R694 R665 C695 R62 R61 R664 R687 U611 R667 J604 J603 R668 C659 R663 XM301 R655 U609 R686 Q603 C657 R650 R666 R669 U612 R1001 R670 P601 U210 C207 R2000 R233 R232 R229 C218 C21
8、4 C220 R208 U208 C204 R203 C203 R2001 R2002 Q204 C227 R250 R215 R248 R213 R212 R211 R210 R234 R219 C219 R227 C210 C221 R207R214R209 R235 C209 R204C206 R221R228 D201 R205 U205 R222 U206 C205 U203 R243 C223 U212 R237 K204 U209 U211 D2002 C222C224 C208 R236 C226 R201 D202 Q201 C202 C225 U201 R202 C201
9、C229 C230 R260 C228 Q206 D205 C232 Q205 R261 R265 R267 C243 D209 R266 T201 K206 R240 Q207 C245 R253 Q202 Q203 R252 R245 R244 R251 D208 C244 R268 Q210 R280 R281 R282 R262 R241 D207 C242 C241 C240 D206 C231 K203 R242 R263 R264 K202 R256 R257 D717 C921 C668 C922 R141 J605 C1000 R1000 R143 D119 C655 C65
10、3 C654 C656 R64 P602 C907 P902 D904 L901 CY901 + + D901 + D902 C932 T901 CY903 D903 U902 C903C906 Q901 C918 C927 C908 L904 C926 U908 S903 D911 C920 C919 U904 S902 T902 CX902 CY902 C904 TH901CY904 TH902 K901 C917 D909 + R914 C931 D906 L903 CX901 L902 ZV901 U905 + C925C923 S901 J901 FUSE901 C405 C400
11、C234 R254 R2508 C237 R259 R255 C235 R258 C236 V201 USB R238 K201 R239 K205 5 ItemPart NumberDescriptionRemark 114-42717-00Cable,1.25mm,17PIN,L=95mmTuner To Main Board 214-42724-00Cable,1.0mm,24PIN,L=240mmKey Board To Main Board 314-44604-01Cable,UL2468#26AWG,4PIN,L=80mmKey Board To Encorde Board 414
12、-42709-00Cable,UL2468#26AWG*9C,9PIN,L=240mmPSU Board To Main Board WIRING DIAGRAM PARTS LIST 6 Signal Power control KUANGXIN FM/AM/RDS MODULE kst-mb114ma1-23 D 1 G 2 V 3 GP1UV701QS Key and IR front panel FM ANTENNA AM ANTENNA ENCODER FM/AM LO FM/AM RO SPI RDS DATA LO RO TRIG IN IR IN RS232 LOGIC Buf
13、fer IR TRIG RS232 MAIN PSU Standby PSU(TNY274PN) 5V 1A MAIN L MAIN N NAD C427 BLOCK DIAGRAM VERSION: V1.0 Drafted by: Ben Data: 2013-06-25 standby (0.2W dissipation ) PSU BOARD LDO AMS1117 3V3S -VF 3V3D +/-12V 0.5A SWITCH +8V TRANSFORMER +VF +8V 0.5A TRANSISTOR LDO AMS1117 GPIO +8V 5VS 5VD APM2301 C
14、onversing VFD BOE CIG128X32Main MCU M30281FAHP SPI I2C GPIO 3V3S VDF Driver MCU PIC18F26K20 3V3D 74LCX244 -VF +VF AC INLET -12V +12V 7 C60 8 1N 2 C616 1N 2 R60 7 47R J R62 3 47R J C60 9 220 P C617 220 P L R chassi s3 1 3 2 K603A JRC-27F/012-S R60 6 470 R R62 2 470 R AGND J601A J601B +12VA AGND C669
15、33U /25V C668 33U /25V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 P601 1. 0-9-17PW B R D S_D AT A R D S_C LK STER EO PLL_DO PLL_C E TUN ER D PLL_C LK PLL_DI DGND AGND +12VA AGND C644 10 0N C646 220 U /25V C645 10 0N C674 47nF R677 2K2 IR B R678 10k 232GND R676 1K 1 2 3 4 5 6 7 8 9 11 10 J608 D Connec
16、t or 9 / EN 1 C1+ 2 V+ 3 C1- 4 C2+ 5 C2- 6 V- 7 RIN 8 ROUT 9 / INV 10 DIN 11 FCON 12 DOUT 13 GND 14 VCC 15 / FCOFF 16 U617 M AX3221 C681 100N C682 100N C690 100N C691 100N 232GND C686 100N 3V3S 232GND 232GND R683 330R R685 330R R232_RX R232_TX C685 10U/ 10V, R679 10R TPS A106M 010R 0900 C687 22N R68
17、0 10R D604 1SS352 D605 1SS352 232GND DGND R684 100R C_M U TE C688 22N R681 10R D606 1SS352 D607 1SS352 AGND ch assi s3 R649 470R R648 470R FM / AM _RO FM / AM _LO R654 4k7 R652 0R Q602 2SC1815 C649 10N D602 1N4148 C652 100P AGND +12VA 4 6 5 K603B 3V3S DGND 3V3S C65 9 100N Y 601 18.432 MH z C66 7 20P
18、 C66 6 20PDGND R67 0 100K dgnd C66 0 100N3V3S 1 2 J60 4 CON 2 R66 7 10R R67 5 1M EG C65 8 22U F/16V P102 57 P91 1 P90 2 CN V SS 3 P87/X CIN 4 P86/X CO U T 5 RESE T 6 X O U T 7 V SS 8 X IN 9 V CC 10 P85/N M I 11 P84/IN T2 12 P83/IN T1 13 P82/IN T0 14 P81 15 P80 16 P77 17 P76 18 P75 19 P74 20 P73 21 P
19、72 22 RXD2/ P71 23 TXD2/ P70 24 TXD1/ P67 25 RXD1/ P66 26 P65 27 P64 28 P33 29 SO3/ P32 30 SI3/ P31 31 CLK3 32 TX D 0/P63 33 RX D 0/P62 34 CLK 0/P61 35 P60 36 P27 37 P26 38 P25 39 P24 40 P23 41 P22 42 SC L/P21 43 SD A /P20 44 P17 45 P16 46 P15 47 P03 48 P02 49 P01 50 P00 51 P107 52 P106 53 P105 54 P
20、104 55 P103 56 P101 58 AVSS 59 P100 60 VREF 61 AVCC 62 P93 63 P92 64 U 611 M30281F A HP RESET 1 GND 2 RESET 3 VDD 5 M R 4 U 614 TPS 3825 DGND R66 2 47KDGND CLK1 BUSY R67 3 33R CNVss CE RESET DGND 3V3S R66 8 0R 1 2 J60 3 CON 2 R67 2 47K 3V3S R232_RX R232_TX 3V3S DGND 12 34 56 78 910 1112 1314 J60 6HE
21、A DER 7X 2 2.54 pitch CLK1 BUSY CNVss CE RESET R232_RX R232_TX R66 3A 120R R66 3B 120R R66 4A 120R R66 4B 120R K EY _ST B SC L SD A KEY_M ISO IRF IRB A0 1 A1 2 A2 3 Vss 4 SDA 5 SCL 6 W P 7 Vdd 8 U 612 24LC 16 DGND 3V3SC65 7 100N SCL SDA DGND R66 4C 120R R 650B 120R R 650C 120R R 650D 120R R 650A 120
22、R ST BY DGND LED_B FPCLKa FPM OSIa VFM ISO KEYM ISOa VFSTBa KEYSTBa IRFa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 J602 To FPP Board 8VD DGND EN CA a EN CB a LED_B 1G 1 A1 2 1Y1 18 A2 4 1Y2 16 A3 6 1Y3 14 A4 8 1Y4 12 V CC 20 G N D 10 2G 19 B1 11 2Y1 9 B2 13 2Y2 7 B3 15 2Y3 5 B4
23、17 2Y4 3 U610 74LCX244 DGND C650 100n DGND DGND R65 9B 120R R65 9C 120R R65 9D 120R R65 9A 120R DGND FPM OSI FPCLK VSTB KEY_STB R65 7B 120R R65 7C 120R R65 7D 120R R65 7A 120R IRF EN CA EN CB KEY_M ISO E N CA E N CB VFM ISO FPCLK FPM OSI V ST B VFM ISO A0 1 GND 2 A1 3 Y 4 Vcc 5 S 6 U609 NC7SZ157 DGN
24、D M ISO Sel 3V3S C647 100N DGND 3V3S 3V3S 5 1 4 J60 5A S CJ3 51-D S S W C66 5 10 0nZ R67 4 33K J 232GND tri g i TRIG R67 1 10 0KJ 3V3S b ec Q 604 D TC114 232GND TRIG STER EO PLL_DO PLL_C E TUN ER D PLL_C LK PLL_DI R66 5A 120R R66 5B 120R R66 5C 120R R66 5D 120R R66 6 47K R66 9 47K3V3S R D S_D AT A R
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