NAD-C720BEE-rec-smp维修电路原理图.pdf

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1、PRELIMINARY NAD SERVICE MANUAL C720BEE STEREO RECEIVER STEREO RECEIVER RadioFans.CN 收音机爱 好者资料库 FACTORY DEFAULTS AND REGION SETTING PROCEDURES RESET FOR AH VERSION FM + DISC RESET FOR C VERSION FM + CD TEST PRESETS 3FM & 3AM AM + MEMORY VFD ALL DISPLAY AM + TAPE AM FREQ. STEP AM and then AM + FM MUTE

2、 VERSION CHECK FM + AM RadioFans.CN 收音机爱 好者资料库 C61 220p R61 220 R63 1M Q61 2SK369 R67 1K R69 430 2% Q63 A970 Q67 D667 C63 22p R611 1K Q64 B647 R613 10K D61 D62 R615 33 C65 0.1u 20% C66 0.1u 20% C69 100p R617 10 R619 10 C62 220p R62 220R64 1M Q62 2SK369 R68 1K R610 430 Q65 A970 Q68 D667 C64 22p R612

3、1K Q66 B647 R614 10K D63 D64 R616 33 C67 0.1u 20% C68 0.1u 20% C610 100p R618 10 R620 10 1 2 3 4 5 6 7 8 9 CB61 R621 120 C611 15pF GND +18V -18V LOUT ROUT RIN- RIN+ LIN+ LIN- C720BEE PREAMP OUT MODULE BOARD 1 2 3 4 5 6 7 8 9 CB31 Moto Pots Borad 37 28 RT33A POTALPS 36 45 RT33B POTALPS 910 RT33C POTA

4、LPS RCA31A DISC RCA31C CD RCA32A AUX RCA32C VIDEO R31 470 R33 470 R35 470 C31 100p,50V,20% C33 100p,50V,20% C35 100p,50V,20% R37 470 C37 100p,50V,20% 4 6 5 RL31B 4 6 5 RL32B 4 6 5 RL33B 4 6 5 RL34B R349 1M R351 1M R353 1M R355 1M L-CH INPUTS C720BEE INPUT SELECT CIRCUIT R39 470 C39 100p,50V,20% 4 6

5、5 RL35B R357 1M RCA31B DISC RCA31D CD RCA32B AUX RCA32D VIDEO R32 470 R34 470 R36 470 C32 100p,50V,20% C34 100p,50V,20% C36 100p,50V,20% R38 470 C38 100p,50V,20% 1 3 2 RL31A 1 3 2 RL32A 1 3 2 RL33A 1 3 2 RL34A R350 1M R352 1M R354 1M R356 1M R-CH INPUTS R310 470 C310 100p,50V,20% 1 3 2 RL35A R358 1M

6、 RCA33D RECORD R RCA33C RECORD L C325 47u/25 R321 3K3 MF R323 750 MF R319 N.I. R325 390 MF R327 180 MF C327 22n 5% C329 0.1u 5% 63V R329 1K5 MF R331 390 MF C331 0.22u 5% C333 0.97u 5% C335 470p,50V,20% 1 2 3 SW31A C339 1u/50 TONE DEFEAT SW R359 5K1 MF ON OFF TO VOLUME POT BALANCE POT BASS POT TREBLE

7、 POT 63V 63V 63V C337 0.1U C321 0.1U C720BEE TONE CONTROL CIRCUIT RT31A RT32A 10KA RT34A 4 5 6 SW31B C326 47u/25 R322 3K3 MF R324 750 MF R320 N.I. R326 390 MF R328 180 MF C328 22n 5% C330 0.1u 5% 63V R330 1K5 MF R332 390 MF C332 0.22u 5% C334 0.97u 5% C336 470p,50V,20% C340 1u/50 TONE DEFEAT SW R360

8、 5K1 MF OFF ON BALANCE POT BASS POT TREBLE POT 63V 63V 63V C338 0.1U C322 0.1U RT31B 10KA RT32B 10KA RT34B 20K MN R407 1K R402 10K R404 10K R403 1K R405 1K R406 1K C417 4u7/50V C418 4u7/50V Q402 C1815 Q401 A1015 Q404 C1815 Q403 A1015 VOLUME CONTROL MOTOR +5V C303 220p C302 220p C301 10uF/50V 78 RL31

9、C 78 RL32C 78 RL33C 78 RL34C 78 RL35C CD +12V RCA34A L PRE-OUT Q31 MMBJ108 C343 220p R338 10M R333 4.7K R335 68 C341 47u/25 R347 100K C345 0.1U RCA34B R PRE-OUT Q32 MMBJ108 C344 220p R339 10M R334 4.7K R336 68 C342 47u/25 R348 100K C346 0.1U PHONE1A IR OUT PHONE1B IR IN PHONE2 +12V Trigger R2 10 C3

10、0.1uF,63v,20% +12V RI1 1K QI1 2SC1815 RI2 1K QI2 2SA1015 RI3 33 +5V +5V C319 0.1u 10% C324 47u/25 C323 47u/25 C320 0.1u 10% 1 2 3 4 5 6 7 8 9 CB32 LOW NOISE AMP MODULE -18V +18V 1 2 3 4 5 6 7 8 9 CB33 LOW NOISE AMP MODULE +18V -18V R345 220K 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CZ36 CON17 GND S

11、TEREO TUNER PLL CLK1 PLL D1 PLL D0 PLL CE RDS CLK RDS DATA +12V L-OUT R-OUT 1 2 3 4 5 6 7 8 CZ37 CON8 STEREO TUNER PLL CLK1 PLL D1 PLL D0 PLL CE RDS CLK RDS DATA R311 470 C311 1n2,50V,10% 4 6 5 RL36B R337 1M TUNER L R346 220K R312 470 C312 1n2,50V,10% 1 3 2 RL36A R341 1M TUNER R RCA33B TAPE RCA33A T

12、APE 78 RL36C Q33 C1815 Q34 C1815 Q35 C1815 Q36 C1815 Q37 C1815 R369 4K7 R371 4K7 R373 4K7 R375 4K7 R377 4K7 C351 10n,63V,10% C352C353C354 CD SEL DISC SEL TAPE SEL AUX SEL TURNER SEL DISCTAPEAUXFM/AM R378 4K7 R376 4K7 R374 4K7 R372 4K7 R370 4K7 Q38 C1815 R379 4K7 R380 4K7 VIDEO STR 1 D 2 CLK 3 Q1 4 Q

13、2 5 Q3 6 Q4 7 VSS 8 QS 9 QS 10 Q8 11 Q7 12 Q6 13 Q5 14 OE 15 VCC 16 IC33 4094 STR 1 D 2 CLK 3 Q1 4 Q2 5 Q3 6 Q4 7 VSS 8 QS 9 QS 10 Q8 11 Q7 12 Q6 13 Q5 14 OE 15 VCC 16 IC32 4094 C357C358 +5V Q39 C1815R381 5K1 VOL- VOL+ IR OUT IR IN 11 1 1 1 1 1 1 1 1 10 9 8 7 6 5 4 3 2 9 8 7 6 5 4 3 2 1 CZ35 CON19 I

14、P SEL DATA IP SEL CLK IP SEL ST Standby +5V 12V VIDIO SEL C355C356 1 2 3 4 5 6 7 8 9 CZ34 -+ Vee 1 L1 2 L2 3 L3 4 L4 5 L-COM1 6 L5 7 L6 8 L-COM2 9 L7 10 L8 11 L-COM3 12 ST 13 Vss 14 CL 15 DATA 16 R-COM3 17 R8 18 R7 19 R-COM2 20 R6 21 R5 22 R-COM1 23 R4 24 R3 25 R2 26 R1 27 Vdd 28 IC31 NJU7313 OP SEL

15、 CLK OP SEL DATA L1 L2 L3 L4 L5 L6 L1 L2 L3 L4 L5 L6 R1 R2 R3 R4 R5 R6 R1 R2 R3 R4 R5 R6 D313 16V D314 16V R367 2K R368 2K +18V-18V SPK A SPK B SPK A SPK B VOL- VOL+ R382 22K CD SEL DISC SEL TAPE SEL AUX SEL TURNER SEL VIDIO SEL OP SEL ST OP SEL CLK OP SEL DATA OP SEL ST IP SEL DATA IP SEL CLK IP SE

16、L ST IP SEL CLK IP SEL ST RI6 100 RI4 4.7K VFD AC1 VFD AC2 + - R317 470 C317 100p C318 100p R318 470 IC34A RC4580IP IC34B RC4580IP R362 11K,MF,1% C347 1uF.63V,5% R365 10k RCA35 PRE-OUT R363 100C360 100p -18V +18V R361 11K,MF,1% C3482.2uF,50V,5% R364 10k R366 10K +5V R492 C441C438C442C440C439 -30V C4

17、44 0.1uF C350 820p R388 20k VR302 100 R386 1.8 R384 560 1% C349 1nF VR301 100 R387 20K R385 1.8 R383 560 1% C61 220p R61 220 R63 1M Q61 2SK369 R65 560 2% R67 1K R69 430 2% Q63 A970 Q67 D667 C63 22p R611 1K Q64 B647 R613 10K D61 D62 R615 33 C65 0.1u 20% C66 0.1u 20% C69 100p R617 10 R619 10 C62 220p

18、R62 220R64 1M Q62 2SK369 R66 560 2% R68 1K R610 430 Q65 A970 Q68 D667 C64 22p R612 1K Q66 B647 R614 10K D63 D64 R616 33 C67 0.1u 20% C68 0.1u 20% C610 100p R618 10 R620 10 1 2 3 4 5 6 7 8 9 CB61 R621 120 C611 40pF GND +18V -18V LOUT ROUT RIN- RIN+ LIN+ LIN- C720BEE PREAMP IN MODULE BOARD Q310 2SK363

19、 R340 10M D315 C361 N.I. D37D38D39D310D311D312 REMOTE MUTE CONTROL MUTE Q311 MMBJ108 Q312 MMBJ108 R389 10M R390 10M R392 100K R391 100K PRE MUTE C362 0.1uF R393 10K 1 2 3 4 5 6 7 8 9 10 CB34 1 2 3 4 5 6 7 8 9 10 CB34 MUTE BOARD SPK A SPK B PROTECTION C720BEE INPUT & PREAMPLIFIER RadioFans.CN 收音机爱 好者

20、资料库 IR OUT IR IN PROTECTION C712 10n C717 100u/16V 2 3 1 IC702 IS1U60L RED R739 15K GREEN Q702 C1815 R718 470 IR RECEIVER R717 330 V S A 1 K 2 A 3 DOUBLE LED G +5V PROTECTION POWER/PROTECTION IND. 513AW N8C320F08 N8C320F06 +5V +12V Q701 C1815 R719 2K2 Q703 C1815 +5V +5V STEREO TUNER PLL CLK1 PLL D1

21、R740 10K PLL D0 D707 1N4148 PLL CE C721 22p RDS CLK C722 4.7p RDS DATA Y701 12MHz R705 10K +5V +5V Standby R723 4.7K +5V R725 4.7K +12V R724 4.7K R726 4.7K C702 10n C701 10n speak a D709 GREEN 1 A 2 K D708 GREEN +5V Q704 C1815 Q705 C1815 speak a OP SEL DATA Q712 2SC1815 OP SEL CLK IP SEL DATA R742 4

22、70 IP SEL CLK IP SEL ST R743 10K IP SEL DATA IP SEL CLK IP SEL ST2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 CZ702 CON19 R711 10k R712 10k R710 10K R713 10K C706 0.1uF C707 0.1uF C708 0.1uF C705 0.1uF A0 1 A1 2 A2 3 Vss 4 SDA 5 SCL 6 WP 7 Vcc 8 IC705 24C64 C719 0.1uF C723 0.1u Standby C704 0.1

23、uF R706 10K S719 SW-PB OP SEL ST OP SEL DATA OP SEL CLK OP SEL ST VFD DOUT VFD DIN VFD CLK VFD STB IP SEL DATA IP SEL CLK IP SEL ST C720 10uF/50V +5V +5V R709 10K R708 10K R707 10K R714 10K R715 10K R716 10K A 1 C 2 B 3 IC706 ENCODE IP SEL CLK IP SEL DATA IP SEL ST2 VIDEO TUNER AUX TAPE CD IR OUT IR

24、 IN IR OUT C718 AUX Q706 C1815 VIDEO Q707 C1815 CD Q708 C1815 DISC Q709 C1815 TAPE Q710 C1815 Q711 C1815 R727 4K7 R729 4K7 R731 4K7 OP SEL CLK R733 4K7 OP SEL DATA R735 4K7 OP SEL ST R737 4K7 C710 10n speak b C711 10n Flash C713 10n speak b C714 10n C715 10n TUNER C716 10n DISC R738 4K7 R736 4K7 R73

25、4 4K7 R732 4K7 R730 4K7 R728 4K7 D715 GREEN 1 A 2 K D714 GREEN D713 GREEN R722 2.2K D712 GREEN D711 GREEN D710 GREEN STR 1 D 2 CLK 3 OE 15 VCC 16 Q1 4 Q2 5 Q3 6 Q4 7 Q5 14 Q6 13 Q7 12 Q8 11 QS 9 QS 10 GND 8 IC707 4094 PSEN 29 ALE/P 30 TXD 11 RXD 10 P27 28 P26 27 P25 26 P24 25 P23 24 P22 23 P21 22 P2

26、0 21 P00 39 P01 38 P02 37 P03 36 P04 35 P05 34 P06 33 P07 32 WR 16 RD 17 RESET 9 X2 18 X1 19 EA/VP 31 T0 14 T1 15 INT0 12 P10 1 P11 2 P12 3 P13 4 P14 5 P15 6 P16 7 P17 8 INT1 13 VCC 40 GND 20 IC704 AT89C55WD +12V A A K K D716 1N4148 +5 R748 8*10K IP SEL ST R749 10K IP SEL ST2 RDS CLK S715 ON/Standby

27、 S716 DISC S717 CD S718 TAPE S711 AUX S712 FM S713 AM S714 SpeakerA S707 SpeakerB S708 Preset down S709 Preset up S710 Tune down S703 Tune up S704 Display S705 Memory S706 Blend S701 FM Mute/Mode S702 video P1 P2 P3 P4 P5 D705 1N4148 D704 1N4148 D703 1N4148 D702 1N4148 D701 1N4148 1 2 3 4 5 6 7 8 9

28、10 11 12 13 14 15 16 17 18 CZ703 CON18 -30V -30V KEY1 KEY2 KEY3 KEY4 +5V VFD1 VFD2 VFD1 VFD2 KEY1 KEY2 KEY3 KEY4 P1 P2 P3 P4 P5 VFD DOUT VFD DIN VFD CLK VFD STB D718D719D717D720 R750 2k D721 5.6V Flash R751 2K C725C726C724 R720 2.2K R721 2.2K 13 2 IC708 TCM810MEND D706 DIODE P1 P2 P3 P4 P5 P6 P7 P8

29、P9 SW1 1 SW2 2 SW3 3 SW4 4 Dout 5 Din 6 IC 7 CLK 8 STB 9 KEY1 10 KEY2 11 KEY3 12 KEY4 13 Vdd 14 Seg1/KS1 15 Seg2/KS2 16 Seg3/KS3 17 Seg4/KS4 18 Seg5/KS5 19 Seg6/KS6 20 Seg7/KS7 21 Seg8/KS8 22 Seg9/KS9 23 Seg10/KS10 24 Seg11/KS11 25 Seg12/KS12 26 Seg13/Grid16 27 Seg14/Grid15 28 Seg15/Grid14 29 Seg16/

30、Grid13 30 Seg17/Grid12 31 Seg18/Grid11 32 Vdd 33 Vee 34 Seg19/Grid10 35 Seg20/Grid9 36 Grid8 37 Grid7 38 Grid6 39 Grid5 40 Grid4 41 Grid3 42 Grid2 43 Grid1 44 Vdd 45 LED5 46 LED4 47 LED3 48 LED2 49 LED1 50 Vss 51 OSC 52 IC703 UPD16311/S0791GC P10 P11 P12 P13 P14 P15 P16 P17 P18 G1 G2 G3 G4 G5 G6 G7

31、G8 G9 G10 +5V +5V C703 0.1uF R741 P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16 P17 P18 G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 F1 1 F1 2 P18 4 P17 5 P16 6 P15 7 P14 8 P13 9 P12 10 P11 11 P10 12 P9 13 P8 14 P7 15 P6 16 P5 17 P4 18 P3 19 P2 20 P1 21 G10 26 G9 27 G8 28 G7 29 G6 30 G5 31 G4 32 G3 33 G2

32、 34 G1 35 F2 37 F2 38 IC701 HNA-10SM12 +5V-30V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 CZ703 CON18 +5V -30V VFD1 VFD2 VFD2 VFD1 P5 P1 P2 P3 P4 R701R702R703R704R747R746R745R744 Din Dout VFD CLK VFD STB Key2 Key3 Key1 Key4 Key2 Key3 Key1 Key4 +5V STEREO TUNER PLL CLK1 PLL D1 PLL D0 PLL CE RDS CLK

33、 RDS DATA 1 2 3 4 5 6 7 8 CZ701 CON8 C720BEE KEYBOARD RadioFans.CN 收音机爱 好者资料库 R446 56K R445 56K D420 1N4148 D419 1N4148 +18V-37V+37V SUPPLY CIR. +5V C219 22n 10% 63V RCA34D MAIN-IN R-CH L OUT R OUT BINDING POSTS BINDING POSTS D412 1N4148 D413 1N4148 +37V R449 10K R450 10K R454 500 R455 500 +37V Q416

34、 C1815 Q417 C1815 2 3 1 84 IC3A TL082D R156 470K R157 470K C122 1uF,63V,5% R11 470 C121 1uF,63V,5% C11 10u/16V R15 22K R14 100 Q12 A970 R158 10K Q13 C2240 C12 470p -18V +18V R19 39K,MF,5% R111 82,MF,5% R112 82,MF,5% R110 39k,MF,5% C14 10u/35V C13 10u/35V Q14 C2240 Q15 A970 R115 33 R116 33 Q16 A1015

35、Q17 C1815 R119 82,MF,5% R120 82,MF,5% C18 22p C19 22p C15 220uF/63V C16 220uF/63V Q110 KSA1220 Q111 KSC2690 R124 3.3/0.5W FP R125 3.3/0.5W FP R128 330/0.5W FP R129 330/0.5W FP R123 47K,5%,1/4 C110 47u/25V C111 47u/25V R126 2K7/2W FP R127 2K7/2W FP R130 82/1W FS R131 82/1W FS R142 22,MF,5% R143 22,MF

36、,5% R136 10 R137 10 Q112 KSC2690 Q115 2SC5200 Q114 2SA1943 Q113 KSA1220 R144 0.068/3W CE R145 0.068/3W CE R139 470 R149 150/1/4W 1% MF C116 2200u/6.3V C117 0.1u 10% 63V L11 1uH R150 1/1W FP R151 10/1W FS C118 0.1u 10% 63V C115 0.1u 10% 63V C114 0.1u 10% Q19 D667 Q18 B647 D13 1N4148 D15 1N4148 D14 1N

37、4148 D16 1N4148 R121 100K,MF,5% R122 100K,MF,5% R21 470 R12 220K R22 220K C112 470p,100V,20% C113 470p,100V,20% R147 1K Q11 C1815 Q12/1 A1015 R152 22K R12/1 6K8 R148 15K C120 22n 10% D17 1N4148 RCA34C MAIN-IN L-CH R146 4K3 1W 1% R154 10 R155 10 Q116 KSC2690 R138 390 Q47 A1015 Q45 A1015 Q46 C1815 R41

38、7 100 R419 100 R418 100 R416 100 C415 10u/25V C416 10u/25V R422 1.1K R423 1.1K R424 1.3K R425 1.3K R420 36K R421 36K D411 20V D410 20V 1 2 3 S41A 4 5 6 S41B ON OFF TP4 TP3 FS FS C720BEE POWER AMP CIR. R 63V 63V -18V +18V+46V -46V +46V -46V D11 4.7V D12 4.7V R103 82,MF,5% Q103 C2240 C103 100uF/16V R1

39、01 39k,MF,5% R106 82,MF,5% Q104 A970 C104 100uF/16V R105 39k,MF,5% R104 220k,MF,5% R102 220k,MF,5% Q101 C2240 Q102 A970 R108 39,MF,5% R107 39,MF,5% Q48 C1815 C17 0.1uF/63V C12/1 47uF/25V R45 33/0.5W FS R41 680 R43 680 R47 680 C43 220u/50V C413 220u/35V Q41 2SD669A C45 22p R49 680 R411 680 R413 680 D

40、49 18V C47 47u/25V C49 47u/25V R414 2K2 R46 33 / 0.5W FS R42 680 R44 680 R48 680 C44 220u/50V C414 220u/35V Q43 C1815 C46 22p R410 680 C48 10u/25V C410 47u/25V R412 2K Q42 2SB649A Q44 A1015 C411 0.1uF C412 0.1u 10% 63V R428 2K2 R429 5K1 MF MF -37V +37V+18V -18V Q411 A1015 R436 56K R435 100K R489 100

41、K R457 220K R451 330K D423 1N4148 R448 100K C434 22n/63V R427 22/1W FP Q413 D669 Q414 C1815 +37V +12V +18V -46V R401 4K7 D403 1N4148 STANDBY Q421 C1815 R469 10K R468 22K R467 T0=80 degree C D428 1N4148 +18V R12/2 22K C422 330u/16V C421 4u7/50V C432 0.22u R441 15K R442 56K C420 100u/16V PROTECTION CI

42、R. 0V 0V +3.25V +2.16V 0V 0V +2.0V +46V 1 2 3 4 CB49 4PIN -46V+46V 1 2 3 CB45 R453 220/2W FP R452 220/2W FP R438 22K R439 T0=90 degree C Q412 C1815 POSISTOR +18V 1 2 3 4 5 6 7 8 IC44 UPC1237HA D42 1N4148 D43 1N4148 R437 47K STANDBY R440 2K2 +18V R478 100K 1 2 3 IC43A TL082D R480 6K2 R482 4K7 R479 10

43、0K C428 10u/25V C425 10u/25V R470 10K R471 10K D418 1N4148D417 1N4148 R477 47K R483 330K R473 47K R472 470K C426 10u/25V C429 10u/25V R488 39K R487 39K R486 560K R474 1K C430 10u/25V R476 1KC431 10u/25V R490 100K R491 100K 4 5 6 7 8 IC43B TL082D +18V +18V-18V ISC CIRCUIT VR12 300 1 1 2 2 3 3 4 4 SPK

44、OUTA 5 5 6 6 7 7 8 8 SPKOUTB 1 2 3 4 5 6 7 8 9 10 CB47 10PIN -30V I-V AC DET. TRIG VFD AC2 VFD AC1 VFD AC1 VFD AC2 6 6 5 5 4 4 3 3 2 2 1 1 RL12/2 6 6 5 5 4 4 3 3 2 2 1 1 RL12/1 C435 1nF C436 1nF R493 10k R494 10k C443 0.1uF R OUT L OUT HEADPHONE OUT L HEADPHONE OUT R JK41 1 2 3 CZ45 PHONES SOCKET N8

45、C320D03 R458 100,FP ,5%,2W R459 100,FP ,5%,2W C41 0.1uF C720BEE HEADPHONE BOARD PRE MUTE REMOTE MUTE CONTROL C119 22n 10% 63V 63V C21 10u/16V R25 22K R24 100 Q22 A970 Q23 C2240 C22 470p,50V,20% R29 39k,MF,5% R211 82,MF,5% R212 82,MF,5% R210 39k,MF,5% C24 10u/35V C23 10u/35V Q24 C2240 Q25 A970 R215 3

46、3 R216 33 R203 82,MF,5% Q26 A1015 Q27 C1815 R219 82,MF,5% R220 82,MF,5% C28 22p C29 22p C25 220uF/63V C26 220uF/63V Q210 KSA1220 Q211 KSC2690 R224 3.3/0.5W FP R225 3.3/0.5W R228 330/0.5W FP R229 330/0.5W R223 47K C210 47u/25V C211 47u/25V R226 2K7/2W R227 2K7/2W R230 82/1W FS R231 82/1W FS R242 22,M

47、F,5% R243 22,MF,5% R236 10 R237 10 Q212 KSC2690 Q215 2SC5200 Q214 2SA1943 Q213 KSA1220 R244 0.068/3W CE R245 0.068/3W CE R239 470 R249 160 1/4 1% MF C2162200u/6.3V C217 0.1u 10% 63V L211uH R250 1/1W FP R251 10/1W FS C218 0.1u 10% C215 0.1u 10% C214 0.1u 10% TP1 Q29 D667 Q28 B647 D23 1N4148 D25 1N414

48、8 D24 1N4148 D26 1N4148 R221 100K,MF,5% R222 100K,MF,5% C212 470p,100V,20% C213 470p,100V,20% R247 1K R248 15K R252 22K Q21 C1815 C220 22n 10% D27 1N4148 R246 4K3/1W 1% MF R254 10 R255 10 Q216 KSC2690 R238 390 FP TP2 FPFP FP FS FS 63V 63V 63V MF Q203 C2240 C203 100uF/16V R201 39K,MF,5% R206 82,MF,5%

49、 R205 39k,MF,5% C204 100uF/16V Q204 A970 +18V -18V +46V -46V R202 220k,MF,5% R204 220k,MF,5% D21 4.7V D22 4.7V Q201 C2240 Q202 A970 R207 39,MF,5% R208 39,MF,5% C27 0.1uF/63V 6 5 7 48 IC4B TL082D R256 470K R257 470K C222 1uF,63V,5% C2211uF,63V,5% R258 2.2k -18V +18V VR22 300 POWER AMP CIR. R SPK B SPK A PROTECTION C720BEE POWER AMPLIFIER SECTION RadioFans.CN 收音机爱 好者资料库 C720BEE PARTS LIST Version： VM3.3 Date： 2005-2-24 P/NDescriptionpart TypeDesignatorFootprintQtyManufacturer model no. 31-01220-00TransistorKSA1220Q110, Q113, Q210, Q213, Q42TO-1265KSA1220A-Y 31-02690-